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PMID |
Sentence |
1 |
17419990
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The regulatory circuits that control the activities of the two distinct target of rapamycin (TOR) complexes, TORC1 and TORC2, and of Akt have been a focus of intense research in recent years.
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2 |
18614546
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Cytoplasmic and nuclear distribution of the protein complexes mTORC1 and mTORC2: rapamycin triggers dephosphorylation and delocalization of the mTORC2 components rictor and sin1.
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3 |
19074679
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Activation of the mammalian target of rapamycin complex 1 (mTORC1) causes the dissociation of eukaryotic initiation factor 4E complex (eIF4E)-binding protein 1 (4E-BP1) from eIF4E, leading to increased eIF4F complex formation. mTORC1 positively regulates protein synthesis and is implicated in several diseases including cardiac hypertrophy, a potentially fatal disorder involving increased cardiomyocyte size.
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4 |
19074679
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The importance of 4E-BP1 in mTORC1-regulated protein synthesis was investigated by overexpressing 4E-BP1, which blocks eIF4F formation in isolated primary cardiomyocytes without affecting other targets for mTORC1 signaling.
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5 |
19074679
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Interestingly, blocking eIF4F formation did not impair the degree of activation of overall protein synthesis by the hypertrophic agent phenylephrine (PE), which, furthermore, remained dependent on mTORC1.
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6 |
19074679
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Overexpressing 4E-BP1 did diminish the PE-stimulated synthesis of luciferase encoded by structured mRNAs, confirming that such mRNAs do require eIF4F for their translation in cardiomyocytes.
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7 |
19074679
|
These data imply that the substantial inhibition of cardiomyocyte protein synthesis and growth caused by inhibiting mTORC1 cannot be attributed to the activation of 4E-BP1 or loss of eIF4F complexes.
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8 |
19074679
|
Activation of the mammalian target of rapamycin complex 1 (mTORC1) causes the dissociation of eukaryotic initiation factor 4E complex (eIF4E)-binding protein 1 (4E-BP1) from eIF4E, leading to increased eIF4F complex formation. mTORC1 positively regulates protein synthesis and is implicated in several diseases including cardiac hypertrophy, a potentially fatal disorder involving increased cardiomyocyte size.
|
9 |
19074679
|
The importance of 4E-BP1 in mTORC1-regulated protein synthesis was investigated by overexpressing 4E-BP1, which blocks eIF4F formation in isolated primary cardiomyocytes without affecting other targets for mTORC1 signaling.
|
10 |
19074679
|
Interestingly, blocking eIF4F formation did not impair the degree of activation of overall protein synthesis by the hypertrophic agent phenylephrine (PE), which, furthermore, remained dependent on mTORC1.
|
11 |
19074679
|
Overexpressing 4E-BP1 did diminish the PE-stimulated synthesis of luciferase encoded by structured mRNAs, confirming that such mRNAs do require eIF4F for their translation in cardiomyocytes.
|
12 |
19074679
|
These data imply that the substantial inhibition of cardiomyocyte protein synthesis and growth caused by inhibiting mTORC1 cannot be attributed to the activation of 4E-BP1 or loss of eIF4F complexes.
|
13 |
19074679
|
Activation of the mammalian target of rapamycin complex 1 (mTORC1) causes the dissociation of eukaryotic initiation factor 4E complex (eIF4E)-binding protein 1 (4E-BP1) from eIF4E, leading to increased eIF4F complex formation. mTORC1 positively regulates protein synthesis and is implicated in several diseases including cardiac hypertrophy, a potentially fatal disorder involving increased cardiomyocyte size.
|
14 |
19074679
|
The importance of 4E-BP1 in mTORC1-regulated protein synthesis was investigated by overexpressing 4E-BP1, which blocks eIF4F formation in isolated primary cardiomyocytes without affecting other targets for mTORC1 signaling.
|
15 |
19074679
|
Interestingly, blocking eIF4F formation did not impair the degree of activation of overall protein synthesis by the hypertrophic agent phenylephrine (PE), which, furthermore, remained dependent on mTORC1.
|
16 |
19074679
|
Overexpressing 4E-BP1 did diminish the PE-stimulated synthesis of luciferase encoded by structured mRNAs, confirming that such mRNAs do require eIF4F for their translation in cardiomyocytes.
|
17 |
19074679
|
These data imply that the substantial inhibition of cardiomyocyte protein synthesis and growth caused by inhibiting mTORC1 cannot be attributed to the activation of 4E-BP1 or loss of eIF4F complexes.
|
18 |
19074679
|
Activation of the mammalian target of rapamycin complex 1 (mTORC1) causes the dissociation of eukaryotic initiation factor 4E complex (eIF4E)-binding protein 1 (4E-BP1) from eIF4E, leading to increased eIF4F complex formation. mTORC1 positively regulates protein synthesis and is implicated in several diseases including cardiac hypertrophy, a potentially fatal disorder involving increased cardiomyocyte size.
|
19 |
19074679
|
The importance of 4E-BP1 in mTORC1-regulated protein synthesis was investigated by overexpressing 4E-BP1, which blocks eIF4F formation in isolated primary cardiomyocytes without affecting other targets for mTORC1 signaling.
|
20 |
19074679
|
Interestingly, blocking eIF4F formation did not impair the degree of activation of overall protein synthesis by the hypertrophic agent phenylephrine (PE), which, furthermore, remained dependent on mTORC1.
|
21 |
19074679
|
Overexpressing 4E-BP1 did diminish the PE-stimulated synthesis of luciferase encoded by structured mRNAs, confirming that such mRNAs do require eIF4F for their translation in cardiomyocytes.
|
22 |
19074679
|
These data imply that the substantial inhibition of cardiomyocyte protein synthesis and growth caused by inhibiting mTORC1 cannot be attributed to the activation of 4E-BP1 or loss of eIF4F complexes.
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23 |
19100909
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TOR is found in 2 structurally and functionally distinct multiprotein complexes, TORC1 and TORC2.
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24 |
19100909
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TORC1 in yeast and mammals mediates temporal control of cell growth by regulating several cellular processes, including translation, transcription, ribosome biogenesis, nutrient transport, and autophagy. mTORC2 is rapamycin insensitive and contains mTOR, rictor, mSIN1, PRR5, and mLST8.
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25 |
19100909
|
TOR is found in 2 structurally and functionally distinct multiprotein complexes, TORC1 and TORC2.
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26 |
19100909
|
TORC1 in yeast and mammals mediates temporal control of cell growth by regulating several cellular processes, including translation, transcription, ribosome biogenesis, nutrient transport, and autophagy. mTORC2 is rapamycin insensitive and contains mTOR, rictor, mSIN1, PRR5, and mLST8.
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27 |
19200882
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Analogous to the situation in yeast, mTOR forms two distinct functional complexes termed mTOR complex 1 and 2 (mTORC1 and mTORC2). mTORC1 activity is inhibited by rapamycin, a specific inhibitor of mTOR, whereas mTORC2 activity is resistant to short-term treatments with rapamycin.
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28 |
19260765
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Rictor/TORC2 regulates Caenorhabditis elegans fat storage, body size, and development through sgk-1.
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29 |
19260765
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The TOR kinase is found in two biochemically and functionally distinct complexes, termed TORC1 and TORC2.
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30 |
19260765
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Among potential targets of TORC2, the pro-survival kinase AKT has garnered much attention.
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31 |
19260765
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Within the context of intact animals, however, the physiological consequences of phosphorylation of AKT by TORC2 remain poorly understood.
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32 |
19260765
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These functions of CeRictor are not mediated through the regulation of AKT kinases or their major downstream target, the insulin-regulated FOXO transcription factor DAF-16.
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33 |
19260765
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These findings identify new physiological roles for TORC2, mediated by SGK, in regulation of C. elegans lipid accumulation and growth, and they challenge the notion that AKT is the primary effector of TORC2 function.
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34 |
19297425
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Elevated corticosterone associated with food deprivation upregulates expression in rat skeletal muscle of the mTORC1 repressor, REDD1.
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35 |
19297425
|
Previous studies have identified upregulated expression of the protein Regulated in DNA Damage and Development (REDD1) as an important mechanism in the regulation of mTORC1 activity in response to a variety of stresses.
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36 |
19297425
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Our goal in this investigation was to determine whether modulation of REDD1 expression occurs in response to food deprivation and refeeding, and, if it does, to ascertain if changes in REDD1 expression correlate with altered mTORC1 signaling.
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37 |
19297425
|
Although diabetic rats exhibited upregulated REDD1 expression compared with nondiabetic controls, there was no direct correlation between REDD1 mRNA expression and serum insulin levels, and insulin treatment of diabetic rats did not affect REDD1 expression.
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38 |
19297425
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Moreover, inhibiting corticosterone-mediated signaling via administration of the glucocorticoid receptor antagonist RU486 blocked both the food deprivation- and diabetes-induced increase in REDD1 mRNA expression.
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39 |
19297425
|
Overall, the results demonstrate that changes in REDD1 expression likely contribute to the regulation of mTORC1 signaling during food deprivation and refeeding.
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40 |
19297425
|
Elevated corticosterone associated with food deprivation upregulates expression in rat skeletal muscle of the mTORC1 repressor, REDD1.
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41 |
19297425
|
Previous studies have identified upregulated expression of the protein Regulated in DNA Damage and Development (REDD1) as an important mechanism in the regulation of mTORC1 activity in response to a variety of stresses.
|
42 |
19297425
|
Our goal in this investigation was to determine whether modulation of REDD1 expression occurs in response to food deprivation and refeeding, and, if it does, to ascertain if changes in REDD1 expression correlate with altered mTORC1 signaling.
|
43 |
19297425
|
Although diabetic rats exhibited upregulated REDD1 expression compared with nondiabetic controls, there was no direct correlation between REDD1 mRNA expression and serum insulin levels, and insulin treatment of diabetic rats did not affect REDD1 expression.
|
44 |
19297425
|
Moreover, inhibiting corticosterone-mediated signaling via administration of the glucocorticoid receptor antagonist RU486 blocked both the food deprivation- and diabetes-induced increase in REDD1 mRNA expression.
|
45 |
19297425
|
Overall, the results demonstrate that changes in REDD1 expression likely contribute to the regulation of mTORC1 signaling during food deprivation and refeeding.
|
46 |
19297425
|
Elevated corticosterone associated with food deprivation upregulates expression in rat skeletal muscle of the mTORC1 repressor, REDD1.
|
47 |
19297425
|
Previous studies have identified upregulated expression of the protein Regulated in DNA Damage and Development (REDD1) as an important mechanism in the regulation of mTORC1 activity in response to a variety of stresses.
|
48 |
19297425
|
Our goal in this investigation was to determine whether modulation of REDD1 expression occurs in response to food deprivation and refeeding, and, if it does, to ascertain if changes in REDD1 expression correlate with altered mTORC1 signaling.
|
49 |
19297425
|
Although diabetic rats exhibited upregulated REDD1 expression compared with nondiabetic controls, there was no direct correlation between REDD1 mRNA expression and serum insulin levels, and insulin treatment of diabetic rats did not affect REDD1 expression.
|
50 |
19297425
|
Moreover, inhibiting corticosterone-mediated signaling via administration of the glucocorticoid receptor antagonist RU486 blocked both the food deprivation- and diabetes-induced increase in REDD1 mRNA expression.
|
51 |
19297425
|
Overall, the results demonstrate that changes in REDD1 expression likely contribute to the regulation of mTORC1 signaling during food deprivation and refeeding.
|
52 |
19297425
|
Elevated corticosterone associated with food deprivation upregulates expression in rat skeletal muscle of the mTORC1 repressor, REDD1.
|
53 |
19297425
|
Previous studies have identified upregulated expression of the protein Regulated in DNA Damage and Development (REDD1) as an important mechanism in the regulation of mTORC1 activity in response to a variety of stresses.
|
54 |
19297425
|
Our goal in this investigation was to determine whether modulation of REDD1 expression occurs in response to food deprivation and refeeding, and, if it does, to ascertain if changes in REDD1 expression correlate with altered mTORC1 signaling.
|
55 |
19297425
|
Although diabetic rats exhibited upregulated REDD1 expression compared with nondiabetic controls, there was no direct correlation between REDD1 mRNA expression and serum insulin levels, and insulin treatment of diabetic rats did not affect REDD1 expression.
|
56 |
19297425
|
Moreover, inhibiting corticosterone-mediated signaling via administration of the glucocorticoid receptor antagonist RU486 blocked both the food deprivation- and diabetes-induced increase in REDD1 mRNA expression.
|
57 |
19297425
|
Overall, the results demonstrate that changes in REDD1 expression likely contribute to the regulation of mTORC1 signaling during food deprivation and refeeding.
|
58 |
19996311
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Insulin induces REDD1 expression through hypoxia-inducible factor 1 activation in adipocytes.
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59 |
19996311
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REDD1 (regulated in development and DNA damage responses) is essential for the inhibition of mTORC1 (mammalian target of rapamycin complex) signaling pathway in response to hypoxia.
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60 |
19996311
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However, the regulation of REDD1 expression in response to insulin remains unknown.
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61 |
19996311
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In the present study, we demonstrate that in murine and in human adipocytes, insulin stimulates REDD1 expression.
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62 |
19996311
|
Insulin-induced REDD1 expression occurs through phosphoinositide 3-kinase/mTOR-dependent pathways.
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63 |
19996311
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Moreover, using echinomycin, a hypoxia-inducible factor 1 (HIF-1) inhibitor, and HIF-1alpha small interfering RNA, we demonstrate that insulin stimulates REDD1 expression only through the transcription factor HIF-1.
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64 |
19996311
|
In conclusion, our study shows that insulin stimulates REDD1 expression in adipocytes.
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65 |
20138985
|
Phosphorylation of PRAS40 on Thr246 by PKB/AKT facilitates efficient phosphorylation of Ser183 by mTORC1.
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66 |
20138985
|
The proline-rich Akt substrate of 40-kDa (PRAS40) is a component of mTORC1, which has a regulatory function at the intersection of the PKB/Akt and mTORC1 signalling pathway.
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67 |
20138985
|
Phosphorylation of PRAS40-Thr246 by PKB/Akt, and PRAS40-Ser183 and PRAS40-Ser221 by mTORC1 results in dissociation from mTORC1, and its binding to 14-3-3 proteins.
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68 |
20138985
|
Insulin promoted PRAS40-Ser183 phosphorylation after a euglycaemic-hyperinsulinaemic clamp in human skeletal muscle.
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69 |
20138985
|
The insulin-induced PRAS40-Ser183 phosphorylation was further evidenced in vivo in rat skeletal and cardiac muscle, and in vitro in A14 fibroblasts, 3T3L1 adipocytes and L6 myotubes.
|
70 |
20138985
|
Inhibition of mTORC1 by rapamycin or amino acid deprivation partially abrogated insulin-mediated PRAS40-Ser183 phosphorylation in cultured cell lines.
|
71 |
20138985
|
However, lowering insulin-induced PRAS40-Thr246 phosphorylation using wortmannin or palmitate in cell lines, or by feeding rats a high-fat diet, completely abolished insulin-mediated PRAS40-Ser183 phosphorylation.
|
72 |
20138985
|
In addition, replacement of Thr246 by Ala reduced insulin-mediated PRAS40-Ser183 phosphorylation.
|
73 |
20138985
|
We conclude that PRAS40-Ser183 is a component of insulin action, and that efficient phosphorylation of PRAS40-Ser183 by mTORC1 requires the phosphorylation of PRAS40-Thr246 by PKB/Akt.
|
74 |
20138985
|
Phosphorylation of PRAS40 on Thr246 by PKB/AKT facilitates efficient phosphorylation of Ser183 by mTORC1.
|
75 |
20138985
|
The proline-rich Akt substrate of 40-kDa (PRAS40) is a component of mTORC1, which has a regulatory function at the intersection of the PKB/Akt and mTORC1 signalling pathway.
|
76 |
20138985
|
Phosphorylation of PRAS40-Thr246 by PKB/Akt, and PRAS40-Ser183 and PRAS40-Ser221 by mTORC1 results in dissociation from mTORC1, and its binding to 14-3-3 proteins.
|
77 |
20138985
|
Insulin promoted PRAS40-Ser183 phosphorylation after a euglycaemic-hyperinsulinaemic clamp in human skeletal muscle.
|
78 |
20138985
|
The insulin-induced PRAS40-Ser183 phosphorylation was further evidenced in vivo in rat skeletal and cardiac muscle, and in vitro in A14 fibroblasts, 3T3L1 adipocytes and L6 myotubes.
|
79 |
20138985
|
Inhibition of mTORC1 by rapamycin or amino acid deprivation partially abrogated insulin-mediated PRAS40-Ser183 phosphorylation in cultured cell lines.
|
80 |
20138985
|
However, lowering insulin-induced PRAS40-Thr246 phosphorylation using wortmannin or palmitate in cell lines, or by feeding rats a high-fat diet, completely abolished insulin-mediated PRAS40-Ser183 phosphorylation.
|
81 |
20138985
|
In addition, replacement of Thr246 by Ala reduced insulin-mediated PRAS40-Ser183 phosphorylation.
|
82 |
20138985
|
We conclude that PRAS40-Ser183 is a component of insulin action, and that efficient phosphorylation of PRAS40-Ser183 by mTORC1 requires the phosphorylation of PRAS40-Thr246 by PKB/Akt.
|
83 |
20138985
|
Phosphorylation of PRAS40 on Thr246 by PKB/AKT facilitates efficient phosphorylation of Ser183 by mTORC1.
|
84 |
20138985
|
The proline-rich Akt substrate of 40-kDa (PRAS40) is a component of mTORC1, which has a regulatory function at the intersection of the PKB/Akt and mTORC1 signalling pathway.
|
85 |
20138985
|
Phosphorylation of PRAS40-Thr246 by PKB/Akt, and PRAS40-Ser183 and PRAS40-Ser221 by mTORC1 results in dissociation from mTORC1, and its binding to 14-3-3 proteins.
|
86 |
20138985
|
Insulin promoted PRAS40-Ser183 phosphorylation after a euglycaemic-hyperinsulinaemic clamp in human skeletal muscle.
|
87 |
20138985
|
The insulin-induced PRAS40-Ser183 phosphorylation was further evidenced in vivo in rat skeletal and cardiac muscle, and in vitro in A14 fibroblasts, 3T3L1 adipocytes and L6 myotubes.
|
88 |
20138985
|
Inhibition of mTORC1 by rapamycin or amino acid deprivation partially abrogated insulin-mediated PRAS40-Ser183 phosphorylation in cultured cell lines.
|
89 |
20138985
|
However, lowering insulin-induced PRAS40-Thr246 phosphorylation using wortmannin or palmitate in cell lines, or by feeding rats a high-fat diet, completely abolished insulin-mediated PRAS40-Ser183 phosphorylation.
|
90 |
20138985
|
In addition, replacement of Thr246 by Ala reduced insulin-mediated PRAS40-Ser183 phosphorylation.
|
91 |
20138985
|
We conclude that PRAS40-Ser183 is a component of insulin action, and that efficient phosphorylation of PRAS40-Ser183 by mTORC1 requires the phosphorylation of PRAS40-Thr246 by PKB/Akt.
|
92 |
20491627
|
Current knowledge indicates that mTOR functions as two distinct multiprotein complexes, mTORC1 and mTORC2. mTORC1 phosphorylates p70 S6 kinase (S6K1) and eukaryotic initiation factor 4E (eIF4E) binding protein 1 (4E-BP1), and regulates cell growth, proliferation, and survival by integrating hormones, growth factors, nutrients, stressors and energy signals.
|
93 |
20585550
|
Akt represents a nodal point between the Insulin receptor and TOR signaling, and its activation by phosphorylation controls cell proliferation, cell size, and metabolism.
|
94 |
20585550
|
This feedback inhibition is switched from TORC1 to S6K only in the context of enhanced TORC1 activity, as triggered by mutations in tsc2.
|
95 |
20817607
|
SREBP-1c can be induced by mTORC1, bifurcating lipogenesis from AKT-activated gluconeogenesis.
|
96 |
21157483
|
Mammalian TOR complex 1 (mTORC1) and mTORC2 exert their actions by regulating other important kinases, such as S6 kinase (S6K) and Akt.
|
97 |
21426932
|
High glucose upregulation of early-onset Parkinson's disease protein DJ-1 integrates the PRAS40/TORC1 axis to mesangial cell hypertrophy.
|
98 |
21426932
|
We identified DJ-1 to increase in response to high glucose in renal glomerular mesangial cells concomitant with an increase in phosphorylation of Akt in a time-dependent manner.
|
99 |
21426932
|
Plasmid-derived overexpression as well as downregulation of DJ-1 by siRNA showed the requirement of this protein in high glucose-stimulated Akt phosphorylation.
|
100 |
21426932
|
The tumor suppressor protein PTEN acts as a negative regulator of Akt activation.
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101 |
21426932
|
Interestingly, DJ-1 was associated with PTEN and this interaction was significantly increased in response to high glucose.
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102 |
21426932
|
High glucose-induced increase in DJ-1 promoted phosphorylation of the PRAS40, a negative regulator of TORC1 kinase activity, resulting in activating and inactivating phosphorylation of S6 kinase and 4EBP-1, respectively.
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103 |
21426932
|
Our results provide evidence for a unique mechanism whereby DJ-1 induces Akt/PRAS40/TORC1-mediated hypertrophy in response to high glucose.
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104 |
21479224
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Evidence suggests that the insulin pathway bifurcates downstream of Akt to regulate these two processes.
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105 |
21479224
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Here, we generated mice with hepatocyte-specific deletion of Tsc1 to study the effects of constitutive mTORC1 activation in the liver.
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106 |
21479224
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Instead, Akt and mTORC1 have opposing effects on hepatic lipid accumulation such that mTORC1 protects against diet-induced steatosis.
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107 |
21606591
|
Genetic deletion of mTOR complex 1 (mTORC1) in mouse podocytes induced proteinuria and progressive glomerulosclerosis.
|
108 |
21606591
|
Furthermore, simultaneous deletion of both mTORC1 and mTORC2 from mouse podocytes aggravated the glomerular lesions, revealing the importance of both mTOR complexes for podocyte homeostasis.
|
109 |
21606591
|
Genetic deletion of mTOR complex 1 (mTORC1) in mouse podocytes induced proteinuria and progressive glomerulosclerosis.
|
110 |
21606591
|
Furthermore, simultaneous deletion of both mTORC1 and mTORC2 from mouse podocytes aggravated the glomerular lesions, revealing the importance of both mTOR complexes for podocyte homeostasis.
|
111 |
21606676
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One important strategy for stimulating protein synthesis involves the ser/thr kinase Akt, which subsequently triggers inactivation of the cap-dependent translational repressor 4E-BP1 by an mTOR-containing protein complex (mTORC1).
|
112 |
21606676
|
Importantly, preventing the virus Akt-imposter from triggering mTORC1 inhibited viral growth, suggesting a new way to block herpes simplex virus.
|
113 |
21606676
|
One important strategy for stimulating protein synthesis involves the ser/thr kinase Akt, which subsequently triggers inactivation of the cap-dependent translational repressor 4E-BP1 by an mTOR-containing protein complex (mTORC1).
|
114 |
21606676
|
Importantly, preventing the virus Akt-imposter from triggering mTORC1 inhibited viral growth, suggesting a new way to block herpes simplex virus.
|
115 |
21813874
|
In conditions of overnutrition, cardiac cells must cope with a multitude of extracellular signals generated by changes in nutrient load (glucose, amino acids, and lipids) and the hormonal milieu [increased insulin (INS), ANG II, and adverse cytokine/adipokine profile].
|
116 |
21813874
|
One adaptive mechanism present in the INS-resistant ZO, but absent in the diabetic ZDF heart, involves an interaction between the nutrient sensor kinase mammalian target of rapamycin complex 1 (mTORC1) and ANG II-type 2 receptor (AT2R).
|
117 |
21876130
|
Consequently, this kinase is implicated in metabolic diseases including cancer and diabetes, so there is great interest in understanding the complete spectrum of mTOR-regulated networks. mTOR exists in two functionally distinct complexes, mTORC1 and mTORC2, and whereas the natural product rapamycin inhibits only a subset of mTORC1 functions, recently developed ATP-competitive mTOR inhibitors have revealed new roles for both complexes.
|
118 |
22158625
|
High glucose stimulated mTORC1 to promote key events in the initiation and elongation phases of mRNA translation: binding of eIF4A to eIF4G, reduction in PDCD4 expression and inhibition of its binding to eIF4A, eEF2 kinase phosphorylation, and dephosphorylation of eEF2; these events were inhibited by NaHS.
|
119 |
22158625
|
NaHS induction of AMPK phosphorylation was inhibited by siRNA for calmodulin kinase kinase β, but not LKB1, upstream kinases for AMPK; STO-609, a calmodulin kinase kinase β inhibitor, had the same effect.
|
120 |
22266904
|
TOR complex 2 (TORC2) in Dictyostelium suppresses phagocytic nutrient capture independently of TORC1-mediated nutrient sensing.
|
121 |
22266904
|
The TOR protein kinase functions in two distinct complexes, TOR complex 1 (TORC1) and 2 (TORC2).
|
122 |
22266904
|
TORC1 is required for growth in response to growth factors, nutrients and the cellular energy state; TORC2 regulates AKT signaling, which can modulate cytoskeletal polarization.
|
123 |
22266904
|
However, loss of Dictyostelium TORC2 components Rictor/Pia, SIN1/RIP3 and Lst8 promotes nutrient particle uptake; inactivation of TORC2 leads to increased efficiency and speed of phagocytosis.
|
124 |
22266904
|
In contrast to phagocytosis, we show that macropinocytosis, an AKT-dependent process for cellular uptake of fluid phase nutrients, is not regulated by either of the TOR complexes.
|
125 |
22266904
|
The integrated and balanced regulation of TORC1 and TORC2 might be crucial in Dictyostelium to coordinate growth and energy needs with other essential TOR-regulated processes.
|
126 |
22266904
|
TOR complex 2 (TORC2) in Dictyostelium suppresses phagocytic nutrient capture independently of TORC1-mediated nutrient sensing.
|
127 |
22266904
|
The TOR protein kinase functions in two distinct complexes, TOR complex 1 (TORC1) and 2 (TORC2).
|
128 |
22266904
|
TORC1 is required for growth in response to growth factors, nutrients and the cellular energy state; TORC2 regulates AKT signaling, which can modulate cytoskeletal polarization.
|
129 |
22266904
|
However, loss of Dictyostelium TORC2 components Rictor/Pia, SIN1/RIP3 and Lst8 promotes nutrient particle uptake; inactivation of TORC2 leads to increased efficiency and speed of phagocytosis.
|
130 |
22266904
|
In contrast to phagocytosis, we show that macropinocytosis, an AKT-dependent process for cellular uptake of fluid phase nutrients, is not regulated by either of the TOR complexes.
|
131 |
22266904
|
The integrated and balanced regulation of TORC1 and TORC2 might be crucial in Dictyostelium to coordinate growth and energy needs with other essential TOR-regulated processes.
|
132 |
22266904
|
TOR complex 2 (TORC2) in Dictyostelium suppresses phagocytic nutrient capture independently of TORC1-mediated nutrient sensing.
|
133 |
22266904
|
The TOR protein kinase functions in two distinct complexes, TOR complex 1 (TORC1) and 2 (TORC2).
|
134 |
22266904
|
TORC1 is required for growth in response to growth factors, nutrients and the cellular energy state; TORC2 regulates AKT signaling, which can modulate cytoskeletal polarization.
|
135 |
22266904
|
However, loss of Dictyostelium TORC2 components Rictor/Pia, SIN1/RIP3 and Lst8 promotes nutrient particle uptake; inactivation of TORC2 leads to increased efficiency and speed of phagocytosis.
|
136 |
22266904
|
In contrast to phagocytosis, we show that macropinocytosis, an AKT-dependent process for cellular uptake of fluid phase nutrients, is not regulated by either of the TOR complexes.
|
137 |
22266904
|
The integrated and balanced regulation of TORC1 and TORC2 might be crucial in Dictyostelium to coordinate growth and energy needs with other essential TOR-regulated processes.
|
138 |
22266904
|
TOR complex 2 (TORC2) in Dictyostelium suppresses phagocytic nutrient capture independently of TORC1-mediated nutrient sensing.
|
139 |
22266904
|
The TOR protein kinase functions in two distinct complexes, TOR complex 1 (TORC1) and 2 (TORC2).
|
140 |
22266904
|
TORC1 is required for growth in response to growth factors, nutrients and the cellular energy state; TORC2 regulates AKT signaling, which can modulate cytoskeletal polarization.
|
141 |
22266904
|
However, loss of Dictyostelium TORC2 components Rictor/Pia, SIN1/RIP3 and Lst8 promotes nutrient particle uptake; inactivation of TORC2 leads to increased efficiency and speed of phagocytosis.
|
142 |
22266904
|
In contrast to phagocytosis, we show that macropinocytosis, an AKT-dependent process for cellular uptake of fluid phase nutrients, is not regulated by either of the TOR complexes.
|
143 |
22266904
|
The integrated and balanced regulation of TORC1 and TORC2 might be crucial in Dictyostelium to coordinate growth and energy needs with other essential TOR-regulated processes.
|
144 |
22328503
|
IQGAP1, a widely conserved effector and/or regulator of the GTPase CDC42, is a putative oncoprotein that controls cell proliferation; however, its mechanism in tumorigenesis is unknown.
|
145 |
22328503
|
Mammalian IQGAP1 binds mTORC1 and Akt1 and in response to epidermal growth factor (EGF), cells expressing the mTORC1-Akt1-binding region (IQGAP1(IR-WW)) contained attenuated phosphorylated ERK1/2 (ERK1/2-P) activity and inactive glycogen synthase kinase 3α/β (GSK3α/β), which control apoptosis.
|
146 |
22328503
|
Interestingly, these cells displayed a high level of Akt1 S473-P, but an attenuated level of the mTORC1-dependent kinase S6K1 T389-P and induced mTORC1-Akt1- and EGF-dependent transformed phenotypes.
|
147 |
22354785
|
Role of PRAS40 in Akt and mTOR signaling in health and disease.
|
148 |
22354785
|
The proline-rich Akt substrate of 40 kDa (PRAS40) acts at the intersection of the Akt- and mammalian target of rapamycin (mTOR)-mediated signaling pathways.
|
149 |
22354785
|
The protein kinase mTOR is the catalytic subunit of two distinct signaling complexes, mTOR complex 1 (mTORC1) and mTORC2, that link energy and nutrients to the regulation of cellular growth and energy metabolism.
|
150 |
22354785
|
Activation of mTOR in response to nutrients and growth factors results in the phosphorylation of numerous substrates, including the phosphorylations of S6 kinase by mTORC1 and Akt by mTORC2.
|
151 |
22354785
|
Although PRAS40 was first reported as substrate for Akt, investigations toward mTOR-binding partners subsequently identified PRAS40 as both component and substrate of mTORC1.
|
152 |
22354785
|
Phosphorylation of PRAS40 by Akt and by mTORC1 itself results in dissociation of PRAS40 from mTORC1 and may relieve an inhibitory constraint on mTORC1 activity.
|
153 |
22354785
|
Role of PRAS40 in Akt and mTOR signaling in health and disease.
|
154 |
22354785
|
The proline-rich Akt substrate of 40 kDa (PRAS40) acts at the intersection of the Akt- and mammalian target of rapamycin (mTOR)-mediated signaling pathways.
|
155 |
22354785
|
The protein kinase mTOR is the catalytic subunit of two distinct signaling complexes, mTOR complex 1 (mTORC1) and mTORC2, that link energy and nutrients to the regulation of cellular growth and energy metabolism.
|
156 |
22354785
|
Activation of mTOR in response to nutrients and growth factors results in the phosphorylation of numerous substrates, including the phosphorylations of S6 kinase by mTORC1 and Akt by mTORC2.
|
157 |
22354785
|
Although PRAS40 was first reported as substrate for Akt, investigations toward mTOR-binding partners subsequently identified PRAS40 as both component and substrate of mTORC1.
|
158 |
22354785
|
Phosphorylation of PRAS40 by Akt and by mTORC1 itself results in dissociation of PRAS40 from mTORC1 and may relieve an inhibitory constraint on mTORC1 activity.
|
159 |
22354785
|
Role of PRAS40 in Akt and mTOR signaling in health and disease.
|
160 |
22354785
|
The proline-rich Akt substrate of 40 kDa (PRAS40) acts at the intersection of the Akt- and mammalian target of rapamycin (mTOR)-mediated signaling pathways.
|
161 |
22354785
|
The protein kinase mTOR is the catalytic subunit of two distinct signaling complexes, mTOR complex 1 (mTORC1) and mTORC2, that link energy and nutrients to the regulation of cellular growth and energy metabolism.
|
162 |
22354785
|
Activation of mTOR in response to nutrients and growth factors results in the phosphorylation of numerous substrates, including the phosphorylations of S6 kinase by mTORC1 and Akt by mTORC2.
|
163 |
22354785
|
Although PRAS40 was first reported as substrate for Akt, investigations toward mTOR-binding partners subsequently identified PRAS40 as both component and substrate of mTORC1.
|
164 |
22354785
|
Phosphorylation of PRAS40 by Akt and by mTORC1 itself results in dissociation of PRAS40 from mTORC1 and may relieve an inhibitory constraint on mTORC1 activity.
|
165 |
22426206
|
Regulation of hepatic LDL receptors by mTORC1 and PCSK9 in mice.
|
166 |
22426206
|
Recent studies have also suggested that hepatic insulin signaling sustains LDLR levels.
|
167 |
22426206
|
We therefore sought to elucidate the mechanisms linking hepatic insulin signaling to regulation of LDLR levels.
|
168 |
22426206
|
In WT mice, insulin receptor knockdown by shRNA resulted in decreased hepatic mTORC1 signaling and LDLR protein levels.
|
169 |
22426206
|
It also led to increased expression of PCSK9, a known post-transcriptional regulator of LDLR expression.
|
170 |
22426206
|
Administration of the mTORC1 inhibitor rapamycin caused increased expression of PCSK9, decreased levels of hepatic LDLR protein, and increased levels of VLDL/LDL cholesterol in WT but not Pcsk9-/- mice.
|
171 |
22426206
|
Conversely, mice with increased hepatic mTORC1 activity exhibited decreased expression of PCSK9 and increased levels of hepatic LDLR protein levels.
|
172 |
22426206
|
Pcsk9 is regulated by the transcription factor HNF1α, and our further detailed analyses suggest that increased mTORC1 activity leads to activation of PKCδ, reduced activity of HNF4α and HNF1α, decreased PCSK9 expression, and ultimately increased hepatic LDLR protein levels, which result in decreased circulating LDL levels.
|
173 |
22426206
|
Regulation of hepatic LDL receptors by mTORC1 and PCSK9 in mice.
|
174 |
22426206
|
Recent studies have also suggested that hepatic insulin signaling sustains LDLR levels.
|
175 |
22426206
|
We therefore sought to elucidate the mechanisms linking hepatic insulin signaling to regulation of LDLR levels.
|
176 |
22426206
|
In WT mice, insulin receptor knockdown by shRNA resulted in decreased hepatic mTORC1 signaling and LDLR protein levels.
|
177 |
22426206
|
It also led to increased expression of PCSK9, a known post-transcriptional regulator of LDLR expression.
|
178 |
22426206
|
Administration of the mTORC1 inhibitor rapamycin caused increased expression of PCSK9, decreased levels of hepatic LDLR protein, and increased levels of VLDL/LDL cholesterol in WT but not Pcsk9-/- mice.
|
179 |
22426206
|
Conversely, mice with increased hepatic mTORC1 activity exhibited decreased expression of PCSK9 and increased levels of hepatic LDLR protein levels.
|
180 |
22426206
|
Pcsk9 is regulated by the transcription factor HNF1α, and our further detailed analyses suggest that increased mTORC1 activity leads to activation of PKCδ, reduced activity of HNF4α and HNF1α, decreased PCSK9 expression, and ultimately increased hepatic LDLR protein levels, which result in decreased circulating LDL levels.
|
181 |
22426206
|
Regulation of hepatic LDL receptors by mTORC1 and PCSK9 in mice.
|
182 |
22426206
|
Recent studies have also suggested that hepatic insulin signaling sustains LDLR levels.
|
183 |
22426206
|
We therefore sought to elucidate the mechanisms linking hepatic insulin signaling to regulation of LDLR levels.
|
184 |
22426206
|
In WT mice, insulin receptor knockdown by shRNA resulted in decreased hepatic mTORC1 signaling and LDLR protein levels.
|
185 |
22426206
|
It also led to increased expression of PCSK9, a known post-transcriptional regulator of LDLR expression.
|
186 |
22426206
|
Administration of the mTORC1 inhibitor rapamycin caused increased expression of PCSK9, decreased levels of hepatic LDLR protein, and increased levels of VLDL/LDL cholesterol in WT but not Pcsk9-/- mice.
|
187 |
22426206
|
Conversely, mice with increased hepatic mTORC1 activity exhibited decreased expression of PCSK9 and increased levels of hepatic LDLR protein levels.
|
188 |
22426206
|
Pcsk9 is regulated by the transcription factor HNF1α, and our further detailed analyses suggest that increased mTORC1 activity leads to activation of PKCδ, reduced activity of HNF4α and HNF1α, decreased PCSK9 expression, and ultimately increased hepatic LDLR protein levels, which result in decreased circulating LDL levels.
|
189 |
22426206
|
Regulation of hepatic LDL receptors by mTORC1 and PCSK9 in mice.
|
190 |
22426206
|
Recent studies have also suggested that hepatic insulin signaling sustains LDLR levels.
|
191 |
22426206
|
We therefore sought to elucidate the mechanisms linking hepatic insulin signaling to regulation of LDLR levels.
|
192 |
22426206
|
In WT mice, insulin receptor knockdown by shRNA resulted in decreased hepatic mTORC1 signaling and LDLR protein levels.
|
193 |
22426206
|
It also led to increased expression of PCSK9, a known post-transcriptional regulator of LDLR expression.
|
194 |
22426206
|
Administration of the mTORC1 inhibitor rapamycin caused increased expression of PCSK9, decreased levels of hepatic LDLR protein, and increased levels of VLDL/LDL cholesterol in WT but not Pcsk9-/- mice.
|
195 |
22426206
|
Conversely, mice with increased hepatic mTORC1 activity exhibited decreased expression of PCSK9 and increased levels of hepatic LDLR protein levels.
|
196 |
22426206
|
Pcsk9 is regulated by the transcription factor HNF1α, and our further detailed analyses suggest that increased mTORC1 activity leads to activation of PKCδ, reduced activity of HNF4α and HNF1α, decreased PCSK9 expression, and ultimately increased hepatic LDLR protein levels, which result in decreased circulating LDL levels.
|
197 |
22426206
|
Regulation of hepatic LDL receptors by mTORC1 and PCSK9 in mice.
|
198 |
22426206
|
Recent studies have also suggested that hepatic insulin signaling sustains LDLR levels.
|
199 |
22426206
|
We therefore sought to elucidate the mechanisms linking hepatic insulin signaling to regulation of LDLR levels.
|
200 |
22426206
|
In WT mice, insulin receptor knockdown by shRNA resulted in decreased hepatic mTORC1 signaling and LDLR protein levels.
|
201 |
22426206
|
It also led to increased expression of PCSK9, a known post-transcriptional regulator of LDLR expression.
|
202 |
22426206
|
Administration of the mTORC1 inhibitor rapamycin caused increased expression of PCSK9, decreased levels of hepatic LDLR protein, and increased levels of VLDL/LDL cholesterol in WT but not Pcsk9-/- mice.
|
203 |
22426206
|
Conversely, mice with increased hepatic mTORC1 activity exhibited decreased expression of PCSK9 and increased levels of hepatic LDLR protein levels.
|
204 |
22426206
|
Pcsk9 is regulated by the transcription factor HNF1α, and our further detailed analyses suggest that increased mTORC1 activity leads to activation of PKCδ, reduced activity of HNF4α and HNF1α, decreased PCSK9 expression, and ultimately increased hepatic LDLR protein levels, which result in decreased circulating LDL levels.
|
205 |
22442749
|
Dairy proteins and meat stimulate insulin/insulin-like growth factor 1 signaling and provide high amounts of leucine, a primary and independent stimulator for mTORC1 activation.
|
206 |
22442749
|
The downstream target of mTORC1, the kinase S6K1, induces insulin resistance by phosphorylation of insulin receptor substrate-1, thereby increasing the metabolic burden of β-cells.
|
207 |
22442749
|
Disturbances of β-cell mass regulation with increased β-cell proliferation and apoptosis as well as insulin resistance are hallmarks of T2D, which are all associated with hyperactivation of mTORC1.
|
208 |
22442749
|
Dairy proteins and meat stimulate insulin/insulin-like growth factor 1 signaling and provide high amounts of leucine, a primary and independent stimulator for mTORC1 activation.
|
209 |
22442749
|
The downstream target of mTORC1, the kinase S6K1, induces insulin resistance by phosphorylation of insulin receptor substrate-1, thereby increasing the metabolic burden of β-cells.
|
210 |
22442749
|
Disturbances of β-cell mass regulation with increased β-cell proliferation and apoptosis as well as insulin resistance are hallmarks of T2D, which are all associated with hyperactivation of mTORC1.
|
211 |
22442749
|
Dairy proteins and meat stimulate insulin/insulin-like growth factor 1 signaling and provide high amounts of leucine, a primary and independent stimulator for mTORC1 activation.
|
212 |
22442749
|
The downstream target of mTORC1, the kinase S6K1, induces insulin resistance by phosphorylation of insulin receptor substrate-1, thereby increasing the metabolic burden of β-cells.
|
213 |
22442749
|
Disturbances of β-cell mass regulation with increased β-cell proliferation and apoptosis as well as insulin resistance are hallmarks of T2D, which are all associated with hyperactivation of mTORC1.
|
214 |
22457328
|
By assembling with unique and shared partner proteins, mTOR forms the catalytic core of at least two complexes, mTOR complex 1 (mTORC1) and mTORC2, that show differential sensitivity to the allosteric mTOR inhibitor rapamycin and that phosphorylate distinct substrates to modulate cell growth, proliferation, survival, and metabolism in response to diverse environmental cues.
|
215 |
22496407
|
Inhibition of mTOR, using either rapamycin (which inhibits predominantly mTORC1) or "catalytic" inhibitors (which effectively inhibit both mTORC1 and mTORC2), provide exciting possibilities for novel forms of treatment of DN and PKD.
|
216 |
22851690
|
The combined deletion of S6K1 and Akt2 deteriorates glycemic control in a high-fat diet.
|
217 |
22851690
|
Signaling downstream of mechanistic target of rapamycin complexes 1 and 2 (mTORC1 and mTORC2) controls specific and distinct aspects of insulin action and nutrient homeostasis in an interconnected and as yet unclear way.
|
218 |
22973301
|
Rapamycin has a biphasic effect on insulin sensitivity in C2C12 myotubes due to sequential disruption of mTORC1 and mTORC2.
|
219 |
22973301
|
Rapamycin, an inhibitor of mTOR complex 1 (mTORC1), improves insulin sensitivity in acute studies in vitro and in vivo by disrupting a negative feedback loop mediated by S6 kinase.
|
220 |
22973301
|
We and others have recently observed that chronic rapamycin treatment induces insulin resistance in rodents, at least in part due to disruption of mTORC2, an mTOR-containing complex that is not acutely sensitive to the drug.
|
221 |
22973301
|
Instead, we found dramatic disruption of mTORC2, which coincided with the onset of insulin resistance.
|
222 |
22973301
|
Selective inhibition of mTORC1 or mTORC2 by shRNA-mediated knockdown of specific components (Raptor and Rictor, respectively) confirmed that mitochondrial effects of rapamycin are mTORC1-dependent, whereas insulin resistance was recapitulated only by knockdown of mTORC2.
|
223 |
22973301
|
Thus, mTORC2 disruption, rather than inhibition of mitochondria, causes insulin resistance in rapamycin-treated myotubes, and this system may serve as a useful model to understand the effects of rapamycin on mTOR signaling in vivo.
|
224 |
22973301
|
Rapamycin has a biphasic effect on insulin sensitivity in C2C12 myotubes due to sequential disruption of mTORC1 and mTORC2.
|
225 |
22973301
|
Rapamycin, an inhibitor of mTOR complex 1 (mTORC1), improves insulin sensitivity in acute studies in vitro and in vivo by disrupting a negative feedback loop mediated by S6 kinase.
|
226 |
22973301
|
We and others have recently observed that chronic rapamycin treatment induces insulin resistance in rodents, at least in part due to disruption of mTORC2, an mTOR-containing complex that is not acutely sensitive to the drug.
|
227 |
22973301
|
Instead, we found dramatic disruption of mTORC2, which coincided with the onset of insulin resistance.
|
228 |
22973301
|
Selective inhibition of mTORC1 or mTORC2 by shRNA-mediated knockdown of specific components (Raptor and Rictor, respectively) confirmed that mitochondrial effects of rapamycin are mTORC1-dependent, whereas insulin resistance was recapitulated only by knockdown of mTORC2.
|
229 |
22973301
|
Thus, mTORC2 disruption, rather than inhibition of mitochondria, causes insulin resistance in rapamycin-treated myotubes, and this system may serve as a useful model to understand the effects of rapamycin on mTOR signaling in vivo.
|
230 |
22973301
|
Rapamycin has a biphasic effect on insulin sensitivity in C2C12 myotubes due to sequential disruption of mTORC1 and mTORC2.
|
231 |
22973301
|
Rapamycin, an inhibitor of mTOR complex 1 (mTORC1), improves insulin sensitivity in acute studies in vitro and in vivo by disrupting a negative feedback loop mediated by S6 kinase.
|
232 |
22973301
|
We and others have recently observed that chronic rapamycin treatment induces insulin resistance in rodents, at least in part due to disruption of mTORC2, an mTOR-containing complex that is not acutely sensitive to the drug.
|
233 |
22973301
|
Instead, we found dramatic disruption of mTORC2, which coincided with the onset of insulin resistance.
|
234 |
22973301
|
Selective inhibition of mTORC1 or mTORC2 by shRNA-mediated knockdown of specific components (Raptor and Rictor, respectively) confirmed that mitochondrial effects of rapamycin are mTORC1-dependent, whereas insulin resistance was recapitulated only by knockdown of mTORC2.
|
235 |
22973301
|
Thus, mTORC2 disruption, rather than inhibition of mitochondria, causes insulin resistance in rapamycin-treated myotubes, and this system may serve as a useful model to understand the effects of rapamycin on mTOR signaling in vivo.
|
236 |
23124837
|
In cells, mTOR is the catalytic subunit of two complexes called mTORC1 and mTORC2, which have distinct upstream regulatory signals and downstream substrates. mTORC1 directly senses cellular nutrient availability while indirectly sensing circulating nutrients through growth factor signaling pathways.
|
237 |
23165769
|
In contrast, mTOR inhibition had no effect on serotonin transport. mTORC1 or mTORC2 silencing markedly decreased the plasma membrane expression of specific System A (SNAT2, SLC38A2) and System L (LAT1, SLC7A5) transporter isoforms without affecting global protein expression.
|
238 |
23165769
|
In conclusion, mTORC1 and mTORC2 regulate human trophoblast amino acid transporters by modulating the cell surface abundance of specific transporter isoforms.
|
239 |
23165769
|
In contrast, mTOR inhibition had no effect on serotonin transport. mTORC1 or mTORC2 silencing markedly decreased the plasma membrane expression of specific System A (SNAT2, SLC38A2) and System L (LAT1, SLC7A5) transporter isoforms without affecting global protein expression.
|
240 |
23165769
|
In conclusion, mTORC1 and mTORC2 regulate human trophoblast amino acid transporters by modulating the cell surface abundance of specific transporter isoforms.
|
241 |
23272222
|
Regulated in development and DNA damage responses -1 (REDD1) protein contributes to insulin signaling pathway in adipocytes.
|
242 |
23272222
|
REDD1 (Regulated in development and DNA damage response 1) is a hypoxia and stress response gene and is a negative regulator of mTORC1.
|
243 |
23272222
|
Since mTORC1 is involved in the negative feedback loop of insulin signaling, we have studied the role of REDD1 on insulin signaling pathway and its regulation by insulin.
|
244 |
23272222
|
In human and murine adipocytes, insulin transiently stimulates REDD1 expression through a MEK dependent pathway.
|
245 |
23272222
|
In HEK-293 cells, expression of a constitutive active form of MEK stabilizes REDD1 and protects REDD1 from proteasomal degradation mediated by CUL4A-DDB1 ubiquitin ligase complex.
|
246 |
23272222
|
In 3T3-L1 adipocytes, silencing of REDD1 with siRNA induces an increase of mTORC1 activity as well as an inhibition of insulin signaling pathway and lipogenesis.
|
247 |
23272222
|
Rapamycin, a mTORC1 inhibitor, restores the insulin signaling after downregulation of REDD1 expression.
|
248 |
23272222
|
This observation suggests that REDD1 positively regulates insulin signaling through the inhibition of mTORC1 activity.
|
249 |
23272222
|
In conclusion, our results demonstrate that insulin increases REDD1 expression, and that REDD1 participates in the biological response to insulin.
|
250 |
23272222
|
Regulated in development and DNA damage responses -1 (REDD1) protein contributes to insulin signaling pathway in adipocytes.
|
251 |
23272222
|
REDD1 (Regulated in development and DNA damage response 1) is a hypoxia and stress response gene and is a negative regulator of mTORC1.
|
252 |
23272222
|
Since mTORC1 is involved in the negative feedback loop of insulin signaling, we have studied the role of REDD1 on insulin signaling pathway and its regulation by insulin.
|
253 |
23272222
|
In human and murine adipocytes, insulin transiently stimulates REDD1 expression through a MEK dependent pathway.
|
254 |
23272222
|
In HEK-293 cells, expression of a constitutive active form of MEK stabilizes REDD1 and protects REDD1 from proteasomal degradation mediated by CUL4A-DDB1 ubiquitin ligase complex.
|
255 |
23272222
|
In 3T3-L1 adipocytes, silencing of REDD1 with siRNA induces an increase of mTORC1 activity as well as an inhibition of insulin signaling pathway and lipogenesis.
|
256 |
23272222
|
Rapamycin, a mTORC1 inhibitor, restores the insulin signaling after downregulation of REDD1 expression.
|
257 |
23272222
|
This observation suggests that REDD1 positively regulates insulin signaling through the inhibition of mTORC1 activity.
|
258 |
23272222
|
In conclusion, our results demonstrate that insulin increases REDD1 expression, and that REDD1 participates in the biological response to insulin.
|
259 |
23272222
|
Regulated in development and DNA damage responses -1 (REDD1) protein contributes to insulin signaling pathway in adipocytes.
|
260 |
23272222
|
REDD1 (Regulated in development and DNA damage response 1) is a hypoxia and stress response gene and is a negative regulator of mTORC1.
|
261 |
23272222
|
Since mTORC1 is involved in the negative feedback loop of insulin signaling, we have studied the role of REDD1 on insulin signaling pathway and its regulation by insulin.
|
262 |
23272222
|
In human and murine adipocytes, insulin transiently stimulates REDD1 expression through a MEK dependent pathway.
|
263 |
23272222
|
In HEK-293 cells, expression of a constitutive active form of MEK stabilizes REDD1 and protects REDD1 from proteasomal degradation mediated by CUL4A-DDB1 ubiquitin ligase complex.
|
264 |
23272222
|
In 3T3-L1 adipocytes, silencing of REDD1 with siRNA induces an increase of mTORC1 activity as well as an inhibition of insulin signaling pathway and lipogenesis.
|
265 |
23272222
|
Rapamycin, a mTORC1 inhibitor, restores the insulin signaling after downregulation of REDD1 expression.
|
266 |
23272222
|
This observation suggests that REDD1 positively regulates insulin signaling through the inhibition of mTORC1 activity.
|
267 |
23272222
|
In conclusion, our results demonstrate that insulin increases REDD1 expression, and that REDD1 participates in the biological response to insulin.
|
268 |
23272222
|
Regulated in development and DNA damage responses -1 (REDD1) protein contributes to insulin signaling pathway in adipocytes.
|
269 |
23272222
|
REDD1 (Regulated in development and DNA damage response 1) is a hypoxia and stress response gene and is a negative regulator of mTORC1.
|
270 |
23272222
|
Since mTORC1 is involved in the negative feedback loop of insulin signaling, we have studied the role of REDD1 on insulin signaling pathway and its regulation by insulin.
|
271 |
23272222
|
In human and murine adipocytes, insulin transiently stimulates REDD1 expression through a MEK dependent pathway.
|
272 |
23272222
|
In HEK-293 cells, expression of a constitutive active form of MEK stabilizes REDD1 and protects REDD1 from proteasomal degradation mediated by CUL4A-DDB1 ubiquitin ligase complex.
|
273 |
23272222
|
In 3T3-L1 adipocytes, silencing of REDD1 with siRNA induces an increase of mTORC1 activity as well as an inhibition of insulin signaling pathway and lipogenesis.
|
274 |
23272222
|
Rapamycin, a mTORC1 inhibitor, restores the insulin signaling after downregulation of REDD1 expression.
|
275 |
23272222
|
This observation suggests that REDD1 positively regulates insulin signaling through the inhibition of mTORC1 activity.
|
276 |
23272222
|
In conclusion, our results demonstrate that insulin increases REDD1 expression, and that REDD1 participates in the biological response to insulin.
|
277 |
23272222
|
Regulated in development and DNA damage responses -1 (REDD1) protein contributes to insulin signaling pathway in adipocytes.
|
278 |
23272222
|
REDD1 (Regulated in development and DNA damage response 1) is a hypoxia and stress response gene and is a negative regulator of mTORC1.
|
279 |
23272222
|
Since mTORC1 is involved in the negative feedback loop of insulin signaling, we have studied the role of REDD1 on insulin signaling pathway and its regulation by insulin.
|
280 |
23272222
|
In human and murine adipocytes, insulin transiently stimulates REDD1 expression through a MEK dependent pathway.
|
281 |
23272222
|
In HEK-293 cells, expression of a constitutive active form of MEK stabilizes REDD1 and protects REDD1 from proteasomal degradation mediated by CUL4A-DDB1 ubiquitin ligase complex.
|
282 |
23272222
|
In 3T3-L1 adipocytes, silencing of REDD1 with siRNA induces an increase of mTORC1 activity as well as an inhibition of insulin signaling pathway and lipogenesis.
|
283 |
23272222
|
Rapamycin, a mTORC1 inhibitor, restores the insulin signaling after downregulation of REDD1 expression.
|
284 |
23272222
|
This observation suggests that REDD1 positively regulates insulin signaling through the inhibition of mTORC1 activity.
|
285 |
23272222
|
In conclusion, our results demonstrate that insulin increases REDD1 expression, and that REDD1 participates in the biological response to insulin.
|
286 |
23395167
|
LRP6 enhances glucose metabolism by promoting TCF7L2-dependent insulin receptor expression and IGF receptor stabilization in humans.
|
287 |
23395167
|
Further investigations showed that the LRP6(R611C) mutation diminishes TCF7L2-dependent transcription of the IR while it increases the stability of IGFR and enhances mTORC1 activity.
|
288 |
23395167
|
These findings identify the Wnt/LRP6/TCF7L2 axis as a regulator of glucose metabolism and a potential therapeutic target for insulin resistance.
|
289 |
23400783
|
The model structure and parameters are identical in the normal and diabetic states of the model, except for three parameters that change in diabetes: (i) reduced concentration of insulin receptor, (ii) reduced concentration of insulin-regulated glucose transporter GLUT4, and (iii) changed feedback from mammalian target of rapamycin in complex with raptor (mTORC1).
|
290 |
23400783
|
Modeling reveals that at the core of insulin resistance in human adipocytes is attenuation of a positive feedback from mTORC1 to the insulin receptor substrate-1, which explains reduced sensitivity and signal strength throughout the signaling network.
|
291 |
23400783
|
The model structure and parameters are identical in the normal and diabetic states of the model, except for three parameters that change in diabetes: (i) reduced concentration of insulin receptor, (ii) reduced concentration of insulin-regulated glucose transporter GLUT4, and (iii) changed feedback from mammalian target of rapamycin in complex with raptor (mTORC1).
|
292 |
23400783
|
Modeling reveals that at the core of insulin resistance in human adipocytes is attenuation of a positive feedback from mTORC1 to the insulin receptor substrate-1, which explains reduced sensitivity and signal strength throughout the signaling network.
|
293 |
23624629
|
Deletion of mTOR reduced mTORC1 and mTORC2 signaling after in vivo insulin stimulation.
|
294 |
23624629
|
Consistent with reduced palmitate oxidation, expression of fatty acid metabolism genes fatty acid-binding protein 3, medium-chain acyl-CoA dehydrogenase, and hydroxyacyl-CoA dehydrogenase/3-ketoacyl-CoA thiolase/enoyl-CoA hydratase (trifunctional protein)-α and -β was reduced, and carnitine palmitoyl transferase-1 and -2 enzymatic activity was decreased.
|
295 |
23624629
|
However, mRNA for peroxisome proliferator-activated receptor-γ coactivator (PGC)-1α and -1β, protein levels of PGC-1α, and electron transport chain subunits, mitochondrial DNA, and morphology were unchanged.
|
296 |
23641065
|
This kinase, which is part of two protein complexes termed mTOR complex 1 (mTORC1) and 2 (mTORC2), has a fundamental role in coordinating anabolic and catabolic processes in response to growth factors and nutrients.
|
297 |
23641065
|
Here, we review the connections between mTORC1 and gene transcription by focusing on its impact in regulating the activation of specific transcription factors including including STAT3, SREBPs, PPARγ, PPARα, HIF1α, YY1–PGC1α and TFEB.
|
298 |
23641065
|
This kinase, which is part of two protein complexes termed mTOR complex 1 (mTORC1) and 2 (mTORC2), has a fundamental role in coordinating anabolic and catabolic processes in response to growth factors and nutrients.
|
299 |
23641065
|
Here, we review the connections between mTORC1 and gene transcription by focusing on its impact in regulating the activation of specific transcription factors including including STAT3, SREBPs, PPARγ, PPARα, HIF1α, YY1–PGC1α and TFEB.
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300 |
23698095
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The target of rapamycin (TOR) is an evolutionarily conserved protein kinase that regulates cell growth in response to various environmental as well as intracellular cues through the formation of 2 distinct TOR complexes (TORC), TORC1 and TORC2.
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301 |
23698095
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Dysregulation of TORC1 and TORC2 activity is closely associated with various diseases, including diabetes, cancer and neurodegenerative disorders.
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302 |
23698095
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Over the past few years, new regulatory mechanisms of TORC1 and TORC2 activity have been elucidated.
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303 |
23698095
|
The target of rapamycin (TOR) is an evolutionarily conserved protein kinase that regulates cell growth in response to various environmental as well as intracellular cues through the formation of 2 distinct TOR complexes (TORC), TORC1 and TORC2.
|
304 |
23698095
|
Dysregulation of TORC1 and TORC2 activity is closely associated with various diseases, including diabetes, cancer and neurodegenerative disorders.
|
305 |
23698095
|
Over the past few years, new regulatory mechanisms of TORC1 and TORC2 activity have been elucidated.
|
306 |
23698095
|
The target of rapamycin (TOR) is an evolutionarily conserved protein kinase that regulates cell growth in response to various environmental as well as intracellular cues through the formation of 2 distinct TOR complexes (TORC), TORC1 and TORC2.
|
307 |
23698095
|
Dysregulation of TORC1 and TORC2 activity is closely associated with various diseases, including diabetes, cancer and neurodegenerative disorders.
|
308 |
23698095
|
Over the past few years, new regulatory mechanisms of TORC1 and TORC2 activity have been elucidated.
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309 |
23747347
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AMPK is an αβγ heterotrimer controlled by allosteric regulation by AMP, ADP and ATP, auto-inhibitory features and phosphorylation, with the threonine-172 phosphorylation on the catalytic α-subunit by LKB1, CaMKKβ or Tak1 being essential for its fully activation.
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310 |
23747347
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In cancer, correction of the dysregulated metabolic pathway LKB1/AMPK/mTORC1 can lower the Warburg effect, suggesting AMPK as a potential target for cancer prevention and/or treatment.
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311 |
23858058
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Recently, we have found that insulin inhibits lipolysis and promotes triglyceride storage by decreasing transcription of adipose triglyceride lipase via the mTORC1-mediated pathway (P.
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312 |
23858058
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One member of the family, Egr1, is induced by insulin and nutrients and directly inhibits activity of the ATGL promoter in vitro and expression of ATGL in cultured adipocytes.
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313 |
23858058
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Feeding animals a high-fat diet increases the activity of mTORC1 and the expression of Egr1 while decreasing ATGL levels in epididymal fat.
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314 |
23901139
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Phosphatidylcholine transfer protein interacts with thioesterase superfamily member 2 to attenuate insulin signaling.
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315 |
23901139
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Phosphatidylcholine transfer protein (PC-TP) is a phospholipid-binding protein that is enriched in liver and that interacts with thioesterase superfamily member 2 (THEM2).
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316 |
23901139
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We found that PC-TP inhibited IRS2, as evidenced by insulin-independent IRS2 activation after knockdown, genetic ablation, or chemical inhibition of PC-TP.
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317 |
23901139
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In addition, IRS2 was activated after knockdown of THEM2, providing support for a role for the interaction of PC-TP with THEM2 in suppressing insulin signaling.
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318 |
23901139
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Additionally, we showed that PC-TP bound to tuberous sclerosis complex 2 (TSC2) and stabilized the components of the TSC1-TSC2 complex, which functions to inhibit mTORC1.
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319 |
23901139
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Preventing phosphatidylcholine from binding to PC-TP disrupted interactions of PC-TP with THEM2 and TSC2, and disruption of the PC-TP-THEM2 complex was associated with increased activation of both IRS2 and mTORC1.
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320 |
23901139
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In livers of mice with genetic ablation of PC-TP or that had been treated with a PC-TP inhibitor, steady-state amounts of IRS2 were increased, whereas those of TSC2 were decreased.
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