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PMID |
Sentence |
1 |
10940305
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The glucagon-like peptide-2 receptor mediates direct inhibition of cellular apoptosis via a cAMP-dependent protein kinase-independent pathway.
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2 |
10940305
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Because GLP-2 decreases mortality and reduces intestinal apoptosis in rodents after experimental injury, we examined whether GLP-2R signaling directly modifies the cellular response to external injury.
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3 |
10940305
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We show here that activation of GLP-2R signaling inhibits cycloheximide-induced apoptosis in baby hamster kidney fibroblasts expressing a transfected GLP-2 receptor.
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4 |
10940305
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GLP-2 reduced DNA fragmentation and improved cell survival, in association with reduced activation of caspase-3 and decreased poly(ADP-ribose) polymerase cleavage and reduced caspase-8 and caspase-9-like activities.
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5 |
10940305
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Both GLP-2 and forskolin reduced mitochondrial cytochrome c release and decreased the cycloheximide-induced cleavage of caspase-3 in the presence or absence of the PKA inhibitor H-89.
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6 |
10940305
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These findings provide evidence that signaling through G protein-coupled receptors of the glucagon superfamily is directly linked to regulation of apoptosis and suggest the existence of a cAMP-dependent protein kinase-, phosphatidylinositol 3-kinase-, and mitogen-activated protein kinase-independent pathway coupling GLP-2R signaling to caspase inhibition and cell survival.
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7 |
10996508
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During mitochondrial dysfunction, several essential players of apoptosis, including pro-caspases, cytochrome C, apoptosis-inducing factor (AIF), and apoptotic protease-activating factor-1 (APAF-1) are released into the cytosol.
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8 |
10996508
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The multimeric complex formation of cytochrome C, APAF-1 and caspase 9 activates downstream caspases leading to apoptotic cell death.
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9 |
11071652
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To explain why deoxyadenosine and its analogs are toxic to a cell that is not undergoing replicative DNA synthesis, several mechanisms have been proposed, including the direct binding of dATP to the pro-apoptotic factor Apaf-1 and the activation of the caspase-9 and -3 pathways.
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10 |
11071652
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The nucleoside-induced damage leads to the release of the pro-apoptotic mitochondrial proteins cytochrome c and apoptosis-inducing factor.
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11 |
11563854
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Stimulation of HAECs with gly-ox-HDL elicited a marked increase in caspase 3 activity and the expressions of active caspase 3 and caspase 9, whereas concomitant treatment with a caspase 3 inhibitor significantly blocked gly-ox-HDL-induced apoptosis of HAECs.
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12 |
11563854
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The increased expressions of Bax and Bad were detected in HAECs incubated for 24 h with gly-ox-HDL, but gly-ox-HDL failed to interfere with the expression of Bcl-2 and Bcl-x.
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13 |
11724785
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Mitochondrial cytochrome c release and activation of caspase-9 accompanied DN-HNF-1 alpha-induced apoptosis, suggesting the involvement of the mitochondrial apoptosis pathway.
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14 |
11724785
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In cells cultured at low glucose, DN-HNF-1 alpha induction also caused up-regulation of the cell cycle inhibitor p27(KIP1).
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15 |
14617576
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Insulin-like growth factor (IGF)-I/IGF-binding protein-3 complex: therapeutic efficacy and mechanism of protection against type 1 diabetes.
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16 |
14617576
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Administration of IGF-I either alone or as an IGF-I/IGFBP-3 complex reduced the severity of insulitis and delayed the onset of T1D in nonobese diabetic mice, but IGF-I/IGFBP-3 was significantly more effective.
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17 |
14617576
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Protection from T1D elicited by IGF-I/IGFBP-3 was mediated by up-regulated CCL4 and down-regulated CCL3 gene expression in pancreatic draining lymph nodes, activation of the phosphatidylinositol 3-kinase and Akt/protein kinase B signaling pathway of beta-cells, reduced beta-cell apoptosis, and stimulation of beta-cell replication.
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18 |
14617576
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Reduced beta-cell apoptosis resulted from elevated Bcl-2 and Bcl-X(L) activity and diminished caspase-9 activity, indicating a novel role for a mitochondrial-dependent pathway of beta-cell death.
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19 |
14617576
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Thus, IGF-I/IGFBP-3 affords more efficient protection from insulitis, beta-cell destruction, and T1D than IGF-I, and this complex may represent an efficacious therapeutic treatment for the prevention of T1D.
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20 |
15153522
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Role of calcium in pancreatic islet cell death by IFN-gamma/TNF-alpha.
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21 |
15153522
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We studied the intracellular events associated with pancreatic beta cell apoptosis by IFN-gamma/TNF-alpha synergism.
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22 |
15153522
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IFN-gamma/TNF-alpha treatment of MIN6N8 insulinoma cells increased the amplitude of high voltage-activated Ca(2+) currents, while treatment with IFN-gamma or TNF-alpha alone did not.
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23 |
15153522
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Cytosolic Ca(2+) concentration ([Ca(2+)](c)) was also increased by IFN-gamma/TNF-alpha treatment.
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24 |
15153522
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Blockade of L-type Ca(2+) channel by nifedipine abrogated death of insulinoma cells by IFN-gamma/TNF-alpha.
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25 |
15153522
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Diazoxide that attenuates voltage-activated Ca(2+) currents inhibited MIN6N8 cell death by IFN-gamma/TNF-alpha, while glibenclamide that accentuates voltage-activated Ca(2+) currents augmented insulinoma cell death.
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26 |
15153522
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A protein kinase C inhibitor attenuated MIN6N8 cell death and the increase in [Ca(2+)](c) by IFN-gamma/TNF-alpha.
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27 |
15153522
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Following the increase in [Ca(2+)](c), calpain was activated, and calpain inhibitors decreased insulinoma cell death by IFN-gamma/TNF-alpha.
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28 |
15153522
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As a downstream of calpain, calcineurin was activated and the inhibition of calcineurin activation by FK506 diminished insulinoma cell death by IFN-gamma/TNF-alpha.
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29 |
15153522
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BAD phosphorylation was decreased by IFN-gamma/TNF-alpha because of the increased calcineurin activity, which was reversed by FK506.
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30 |
15153522
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IFN-gamma/TNF-alpha induced cytochrome c translocation from mitochondria to cytoplasm and activation of caspase-9.
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31 |
15153522
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Effector caspases such as caspase-3 or -7 were also activated by IFN-gamma/TNF-alpha treatment.
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32 |
15153522
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These results indicate that IFN-gamma/TNF-alpha synergism induces pancreatic beta cell apoptosis by Ca(2+) channel activation followed by downstream intracellular events such as mitochondrial events and caspase activation and also suggest the therapeutic potential of Ca(2+) modulation in type 1 diabetes.
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33 |
15246841
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Caspase-3 activation was evident in the nuclear fraction of the cortex of diabetic rats after 3 days recovery and it was preceded by activation of caspase-9, but not activation of caspase-8.
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34 |
15246841
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These results suggest that a brief period of global ischemia in diabetic animals activates a neuronal cell death pathway involving cytochrome c release, caspase-9 activation, and caspase-3 cleavage, all of which are most likely initiated by early mitochondria damage.
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35 |
15246841
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Caspase-3 activation was evident in the nuclear fraction of the cortex of diabetic rats after 3 days recovery and it was preceded by activation of caspase-9, but not activation of caspase-8.
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36 |
15246841
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These results suggest that a brief period of global ischemia in diabetic animals activates a neuronal cell death pathway involving cytochrome c release, caspase-9 activation, and caspase-3 cleavage, all of which are most likely initiated by early mitochondria damage.
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37 |
15590648
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In vivo experiments established that CML-collagen but not unmodified collagen induced fibroblast apoptosis and that apoptosis was dependent upon caspase-3, -8, and -9 activity.
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38 |
15590648
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AGE-induced apoptosis was largely dependent on the effector caspase, caspase-3, which was activated through both cytoplasmic (caspase-8-dependent) and mitochondrial (caspase-9) pathways.
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39 |
15596134
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Inactivation of Akt was associated with dephosphorylation of BAD, increased cytochrome c release, and activation of caspase-3 and caspase-9.
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40 |
15642122
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Saturated free fatty acids and apoptosis in microvascular mesangial cells: palmitate activates pro-apoptotic signaling involving caspase 9 and mitochondrial release of endonuclease G.
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41 |
15705778
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We therefore generated a stable transfected beta-cell line (INS-1) overexpressing human TXNIP and found that TXNIP overexpression induced apoptosis as assessed by Bax, Bcl2, caspase-3, and cleaved caspase-9 as well as Hoechst staining.
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42 |
15705778
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Interestingly, islets of insulin-resistant/diabetic mice (AZIP-F1, BTBRob/ob) demonstrated elevated TXNIP expression, suggesting that TXNIP may play a role in glucotoxicity and the beta-cell loss observed under these conditions.
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43 |
15705778
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Thus, TXNIP is a novel proapoptotic beta-cell gene elevated in insulin resistance/diabetes and up-regulated by glucose through a unique ChoRE and may link glucotoxicity and beta-cell apoptosis.
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44 |
16799131
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Furthermore, the appearance of the active proteolytic subunits of caspase-3 and caspase-9 were detected in cell lysate from THP1 cells and also increased in a dose- and time-dependent manner following pioglitazone treatment.
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45 |
16951721
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American ginseng stimulates insulin production and prevents apoptosis through regulation of uncoupling protein-2 in cultured beta cells.
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46 |
16951721
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A mitochondrial protein, uncoupling protein-2 (UCP-2) has been found to play a critical role in insulin synthesis and beta cell survival.
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47 |
16951721
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Our preliminary studies found that the extracts of American ginseng inhibit UCP-2 expression which may contribute to the ability of ginseng protecting beta cell death and improving insulin synthesis.
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48 |
16951721
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Therefore, we hypothesized that ginseng extracts suppress UCP-2 in the mitochondria of pancreatic beta cells, promoting insulin synthesis and anti-apoptosis (a programmed cell-death mechanism).
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49 |
16951721
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We evaluated effects of ginseng on UCP-2 expression, insulin production, anti-/pro-apoptotic factors Bcl-2/caspase-9 expression and cellular ATP levels.
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50 |
16951721
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We found that ginseng suppresses UCP-2, down-regulates caspase-9 while increasing ATP and insulin production/secretion and up-regulates Bcl-2, reducing apoptosis.
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51 |
16951721
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These findings suggest that stimulation of insulin production and prevention of beta cell loss by American ginseng extracts can occur via the inhibition of mitochondrial UCP-2, resulting in increase in the ATP level and the anti-apoptotic factor Bcl-2, while down-regulation of pro-apoptotic factor caspase-9 occurs, lowering the occurrence of apoptosis, which support the hypothesis.
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52 |
16951721
|
American ginseng stimulates insulin production and prevents apoptosis through regulation of uncoupling protein-2 in cultured beta cells.
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53 |
16951721
|
A mitochondrial protein, uncoupling protein-2 (UCP-2) has been found to play a critical role in insulin synthesis and beta cell survival.
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54 |
16951721
|
Our preliminary studies found that the extracts of American ginseng inhibit UCP-2 expression which may contribute to the ability of ginseng protecting beta cell death and improving insulin synthesis.
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55 |
16951721
|
Therefore, we hypothesized that ginseng extracts suppress UCP-2 in the mitochondria of pancreatic beta cells, promoting insulin synthesis and anti-apoptosis (a programmed cell-death mechanism).
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56 |
16951721
|
We evaluated effects of ginseng on UCP-2 expression, insulin production, anti-/pro-apoptotic factors Bcl-2/caspase-9 expression and cellular ATP levels.
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57 |
16951721
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We found that ginseng suppresses UCP-2, down-regulates caspase-9 while increasing ATP and insulin production/secretion and up-regulates Bcl-2, reducing apoptosis.
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58 |
16951721
|
These findings suggest that stimulation of insulin production and prevention of beta cell loss by American ginseng extracts can occur via the inhibition of mitochondrial UCP-2, resulting in increase in the ATP level and the anti-apoptotic factor Bcl-2, while down-regulation of pro-apoptotic factor caspase-9 occurs, lowering the occurrence of apoptosis, which support the hypothesis.
|
59 |
16951721
|
American ginseng stimulates insulin production and prevents apoptosis through regulation of uncoupling protein-2 in cultured beta cells.
|
60 |
16951721
|
A mitochondrial protein, uncoupling protein-2 (UCP-2) has been found to play a critical role in insulin synthesis and beta cell survival.
|
61 |
16951721
|
Our preliminary studies found that the extracts of American ginseng inhibit UCP-2 expression which may contribute to the ability of ginseng protecting beta cell death and improving insulin synthesis.
|
62 |
16951721
|
Therefore, we hypothesized that ginseng extracts suppress UCP-2 in the mitochondria of pancreatic beta cells, promoting insulin synthesis and anti-apoptosis (a programmed cell-death mechanism).
|
63 |
16951721
|
We evaluated effects of ginseng on UCP-2 expression, insulin production, anti-/pro-apoptotic factors Bcl-2/caspase-9 expression and cellular ATP levels.
|
64 |
16951721
|
We found that ginseng suppresses UCP-2, down-regulates caspase-9 while increasing ATP and insulin production/secretion and up-regulates Bcl-2, reducing apoptosis.
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65 |
16951721
|
These findings suggest that stimulation of insulin production and prevention of beta cell loss by American ginseng extracts can occur via the inhibition of mitochondrial UCP-2, resulting in increase in the ATP level and the anti-apoptotic factor Bcl-2, while down-regulation of pro-apoptotic factor caspase-9 occurs, lowering the occurrence of apoptosis, which support the hypothesis.
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66 |
17131386
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Apoptotic signaling in methylglyoxal-treated human osteoblasts involves oxidative stress, c-Jun N-terminal kinase, caspase-3, and p21-activated kinase 2.
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67 |
17131386
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We further show that MG-induced apoptosis of osteoblasts involves specific apoptotic biochemical changes, including oxidative stress, c-Jun N-terminal kinase (JNK) activation, mitochondrial membrane potential changes, cytochrome C release, increased Bax/Bcl-2 protein ratios, and activation of caspases (caspase-9, caspase-3) and p21-activated protein kinase 2 (PAK2).
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68 |
17131386
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Treatment of osteoblasts with SP600125, a JNK-specific inhibitor, led to a reduction in MG-induced apoptosis and decreased activation of caspase-3 and PAK2, indicating that JNK activity is upstream of these events.
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69 |
17131386
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Experiments using anti-sense oligonucleotides against PAK2 further showed that PAK2 activation is required for MG-induced apoptosis in osteoblasts.
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70 |
17400580
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Using benzyloxycarbonyl-VAD-fluoromethyl ketone (VAD-FMK) as a pan-caspase inhibitor, we demonstrated that an initial cytochrome c release occurred independently of caspase activation and that only caspase-9 activation was partially caspase independent.
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71 |
17721990
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Co-treatment of HUVECs with 5 microM MG and 20 mM glucose significantly increased cytoplasmic free calcium levels, activation of nitric oxide synthase (NOS), caspase-3 and -9, cytochrome c release, and apoptotic cell death.
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72 |
17721990
|
Pretreatment with nitric oxide (NO) scavengers could inhibit 5 microM MG/20 mM glucose-induced cytochrome c release, decrease activation of caspase-9 and caspase-3, and increase the gene expression and protein levels of p53 and p21, which are known to be involved in apoptotic signaling.
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73 |
17721990
|
Inhibition of p53 protein expression using small interfering RNA (siRNA) blocked the activation of p21 and the cell apoptosis induced by 5 microM MG/20 mM glucose.
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74 |
17721990
|
In contrast, inhibition of p21 protein expression by siRNA prevented apoptosis in HUVECs but had no effect on p53 expression.
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75 |
18081694
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This study examined the effects of interleukin-1beta (IL-1beta), interferon-gamma (IFNgamma) and tumour necrosis factor alpha (TNFalpha) on a rat insulinoma cell line (RIN-r) in order to identify the core mechanism of cytokine-induced beta-cell death.
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76 |
18081694
|
Treatment of cells with a combination of IL-1beta and IFNgamma (IL-1beta/IFNgamma)induced apoptotic cell death.
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77 |
18081694
|
TNFalpha neither induced beta-cell death nor did it potentiate the effects of IL-1beta, IFNgamma or IL-1beta/IFNgamma .
|
78 |
18081694
|
The cytotoxic effect of IL-1beta/IFNgamma was associated with the expression of inducible nitric oxide synthase (iNOS) and production of nitric oxide.
|
79 |
18081694
|
The broad range caspase inhibitor, Boc-D-fmk, blocked IL-1beta/IFNgamma -induced caspase activity, but not nitric oxide production nor cell death.
|
80 |
18081694
|
IL-1beta/IFNgamma -induced apoptosis was accompanied by loss of mitochondrial membrane potential, release of cytochrome c and cleavage of pro-caspase-9, -7 and -3.
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81 |
18081694
|
Transduction of cells with Ad-Bcl-X(L) blocked both iNOS and cytokine-mediated mitochondrial changes and subsequent apoptosis, downstream of nitric oxide.
|
82 |
18813861
|
Therefore, we directly investigated exercise training to determine whether it was able to ameliorate the molecular pathogenic phenotypes in the brain using a neuron-specific enolase (NSE)/Swedish mutation of amyloid precursor protein (APPsw) transgenic (Tg) mice as a novel AD model.
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83 |
18813861
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The results indicated (i) that amyloid beta-42 (Abeta-42) peptides were significantly decreased in the NSE/APPsw Tg mice following exercise training; (ii) that exercise training inhibited the apoptotic biochemical cascades, including cytochrome c, caspase-9, caspase-3 and Bax; (iii) that the glucose transporter-1 (GLUT-1) and brain-derived neurotrophic factor (BDNF) proteins induced by exercise training protected the neurons from injury by inducing the concomitant expression of genes that encode proteins such as superoxide dismutase-1 (SOD-1), catalase and Bcl-2, which suppress oxidative stress and excitotoxic injury; (iv) that heat-shock protein-70 (HSP-70) and glucose-regulated protein-78 (GRP-78) were significantly increased in the exercise (EXE) group when compared to the sedentary (SED) group, and that these proteins may benefit the brain by making it more resistant to stress-induced neuron cell damage; (v) and that exercise training contributed to the restoration of normal levels of serum total cholesterol, insulin and glucose.
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84 |
18840766
|
However, the role of Bax and Bcl-2 in regulating palmitate-induced apoptosis has not been well studied.
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85 |
18840766
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Therefore, the purpose of this study was to determine whether palmitate-induced apoptosis in C(2)C(12) myotubes is dependent on Bax to Bcl-2 binding.
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86 |
18840766
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An additional purpose of this study was to determine whether the changes in Bax to Bcl-2 binding corresponded to decreases in Akt signaling in palmitate-treated myoblasts.
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87 |
18840766
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Bax to Bcl-2 binding was determined through a coimmunoprecipitation assay that was performed in myotubes after 2 h of serum starvation, followed by 10 min of serum reintroduction.
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88 |
18840766
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This experiment evaluated whether temporal Akt activity coincided with Bax to Bcl-2 binding.
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89 |
18840766
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Palmitate treatment increased apoptosis in C(2)C(12) myotubes as shown by a twofold increase in DNA fragmentation, an approximately fivefold increase in caspase-3 activity, and a 2.5-fold increase in caspase-9 activity.
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90 |
18840766
|
In addition, there was a fourfold reduction in Bax to Bcl-2 binding with palmitate treatment, which mirrored the reduction in Akt(Ser473) phosphorylation.
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91 |
19194987
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Inhibition of caspase-8 activity also reduced hyperglycemia-induced Bid activation and caspase-9 cleavage.
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92 |
19194987
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These data suggest that caspase-8 may control diabetic embryopathy-associated apoptosis via regulation of the Bid-stimulated mitochondrion/caspase-9 pathway.
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93 |
19194987
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Inhibition of caspase-8 activity also reduced hyperglycemia-induced Bid activation and caspase-9 cleavage.
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94 |
19194987
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These data suggest that caspase-8 may control diabetic embryopathy-associated apoptosis via regulation of the Bid-stimulated mitochondrion/caspase-9 pathway.
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95 |
19208856
|
The higher incidence of HIV-PI-induced cell death was associated with cleavage and, hence, activation of caspase-3 and poly(ADP)-ribose polymerase but not with activation of phospho-pancreatic endoplasmic reticulum (ER) kinase or induction of ER stress apoptotic factor C/EBP homologous protein.
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96 |
19208856
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Exposure to the HIV-PIs, however, led to activation of mitochondria-associated caspase-9, caused a loss in mitochondrial membrane potential, and promoted the release of cytochrome c, suggesting that HIV-PIs currently in clinically use can induce beta-cell apoptosis by activating the mitochondrial apoptotic pathway.
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97 |
19342653
|
Drak2 is a member of the death-associated protein family and a serine threonine kinase.
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98 |
19342653
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We established that inducible NO synthase was upstream and caspase-9 was downstream of Drak2 in its signaling pathway.
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99 |
19342653
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Purified Drak2 could phosphorylate ribosomal protein S6 (p70S6) kinase in an in vitro kinase assay.
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100 |
19467786
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We previously reported that high glucose can induce apoptosis in PC12 cells, as evidenced by DNA fragmentation and high Bax/Bcl-2 ratio.
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101 |
19467786
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The present study examined the involvement of caspase-3, the executioner, and two initiators of apoptosis, caspase-8 and caspase-9, during high glucose-induced apoptosis in PC12 cells, a neuronal cell line.
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102 |
19718675
|
Cardiac mitochondrial-dependent apoptotic pathways, such as Bad, cytosolic cytochrome c, activated caspase 9 and 3, and calcineurin-nuclear factor activation transcription 3 (NFAT3) hypertrophic pathway in DM were increased compared to Control and attenuated in DI group after 8 weeks whereas those were not found after 4 weeks.
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103 |
19718675
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Insulin-like growth factor-I receptor (IGFIR), phosphatidylinositol 3'-kinase (PI3K), and the protein kinase B (Akt) were significantly decreased in DM relative to Control and DI after 8 weeks whereas those were not found after 4 weeks.
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104 |
19718675
|
Insulin replacement not only prevents activation of the cardiac mitochondrial-dependent apoptotic pathway and calcineurin-related NFAT3 hypertrophic pathway in diabetes but it also enhances the cardiac insulin/IGFIR-PI3K-Akt survival pathway, all of which are attenuated with insulin therapeutic duration-dependent manners.
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105 |
19807652
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Insulin sensitizers such as biguanides or AMP-activated protein kinase activator, but not glitazones, afforded cytoprotection through preventing (Deltapsi(m) collapse and activation of caspase-9 that was independent of cellular GSH.
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106 |
19843876
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The adipocyte-specific protein FSP27, also known as CIDEC, is one of three cell death-inducing DFF45-like effector (CIDE) proteins.
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107 |
19843876
|
The apoptotic mechanism of FSP27, which we show involves caspase-9 and mitochondrial cytochrome c, also requires this 19-amino acid region.
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108 |
19966057
|
Ten weeks following injection, diabetic hearts displayed increased caspase-3 and caspase-9 activities, indicating enhanced apoptotic signaling (P < 0.05, for both).
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109 |
19966057
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Furthermore, diabetic IFM possessed lower cytochrome c and BcL-2 levels and increased Bax levels (P < 0.05, for all 3).
|
110 |
20200974
|
TNF-alpha mediates diabetes-enhanced chondrocyte apoptosis during fracture healing and stimulates chondrocyte apoptosis through FOXO1.
|
111 |
20200974
|
Tumor necrosis factor alpha (TNF-alpha) protein levels were assessed by ELISA and caspase-3 by bioactivity assay.
|
112 |
20200974
|
In vitro studies investigated the proapoptotic transcription factor FOXO1 in regulating TNF-induced apoptosis of chondrogenic ATDC5 and C3H10T1/2 cells as representative of differentiated chondrocytes, which are important during endochondral ossification. mRNA profiling revealed an upregulation of gene sets related to apoptosis in the diabetic group on day 16 when cartilage resorption is active but not day 12 or day 22.
|
113 |
20200974
|
This coincided with elevated TNF-alpha protein levels, chondrocyte apoptosis, enhanced caspase-3 activity, and increased FOXO1 nuclear translocation (p < .05).
|
114 |
20200974
|
Silencing FOXO1 using siRNA in vitro significantly reduced TNF-induced apoptosis and caspase activity in differentiated chondrocytes.
|
115 |
20200974
|
The mRNA levels of the proapoptotic genes caspase-3, caspase-8, caspase-9, and TRAIL were significantly reduced with silencing of FOXO1 in chondrocytic cells.
|
116 |
20200974
|
Inhibiting caspase-8 and caspase-9 significantly reduced TNF-induced apoptosis in chondrogenic cells.
|
117 |
20200974
|
Diabetes increased chondrocyte apoptosis through a mechanism that involved enhanced production of TNF-alpha, which stimulates chondrocyte apoptosis and upregulates mRNA levels of apoptotic genes through FOXO1 activation.
|
118 |
20200974
|
TNF-alpha mediates diabetes-enhanced chondrocyte apoptosis during fracture healing and stimulates chondrocyte apoptosis through FOXO1.
|
119 |
20200974
|
Tumor necrosis factor alpha (TNF-alpha) protein levels were assessed by ELISA and caspase-3 by bioactivity assay.
|
120 |
20200974
|
In vitro studies investigated the proapoptotic transcription factor FOXO1 in regulating TNF-induced apoptosis of chondrogenic ATDC5 and C3H10T1/2 cells as representative of differentiated chondrocytes, which are important during endochondral ossification. mRNA profiling revealed an upregulation of gene sets related to apoptosis in the diabetic group on day 16 when cartilage resorption is active but not day 12 or day 22.
|
121 |
20200974
|
This coincided with elevated TNF-alpha protein levels, chondrocyte apoptosis, enhanced caspase-3 activity, and increased FOXO1 nuclear translocation (p < .05).
|
122 |
20200974
|
Silencing FOXO1 using siRNA in vitro significantly reduced TNF-induced apoptosis and caspase activity in differentiated chondrocytes.
|
123 |
20200974
|
The mRNA levels of the proapoptotic genes caspase-3, caspase-8, caspase-9, and TRAIL were significantly reduced with silencing of FOXO1 in chondrocytic cells.
|
124 |
20200974
|
Inhibiting caspase-8 and caspase-9 significantly reduced TNF-induced apoptosis in chondrogenic cells.
|
125 |
20200974
|
Diabetes increased chondrocyte apoptosis through a mechanism that involved enhanced production of TNF-alpha, which stimulates chondrocyte apoptosis and upregulates mRNA levels of apoptotic genes through FOXO1 activation.
|
126 |
20490276
|
Insulin promotes survival of amyloid-beta oligomers neuroblastoma damaged cells via caspase 9 inhibition and Hsp70 upregulation.
|
127 |
20490276
|
Here we show an evidence that insulin is capable of reducing cytotoxicity induced by Amyloid-beta peptides (A-beta) in its oligomeric form in a dose-dependent manner.
|
128 |
20490276
|
By TUNEL and biochemical assays we demonstrate that the recovery of the cell viability is obtained by inhibition of intrinsic apoptotic program, triggered by A-beta and involving caspase 9 and 3 activation.
|
129 |
20490276
|
Furthermore, A-beta activates the stress inducible Hsp70 protein in LAN5 cells and an overexpression is detectable after the addition of insulin, suggesting that this major induction is the necessary condition to activate a cell survival program.
|
130 |
20490276
|
Insulin promotes survival of amyloid-beta oligomers neuroblastoma damaged cells via caspase 9 inhibition and Hsp70 upregulation.
|
131 |
20490276
|
Here we show an evidence that insulin is capable of reducing cytotoxicity induced by Amyloid-beta peptides (A-beta) in its oligomeric form in a dose-dependent manner.
|
132 |
20490276
|
By TUNEL and biochemical assays we demonstrate that the recovery of the cell viability is obtained by inhibition of intrinsic apoptotic program, triggered by A-beta and involving caspase 9 and 3 activation.
|
133 |
20490276
|
Furthermore, A-beta activates the stress inducible Hsp70 protein in LAN5 cells and an overexpression is detectable after the addition of insulin, suggesting that this major induction is the necessary condition to activate a cell survival program.
|
134 |
20933054
|
This study demonstrates that pro-inflammatory cytokines strongly modified the expression of the anti-apoptotic protein Bcl-2 and the pro-apoptotic BH3-only proteins Bad, Bim, and Bid in primary rat islets and insulin-producing RINm5F cells.
|
135 |
20933054
|
Overexpression of mitochondrially located catalase (MitoCatalase) specifically increased basal Bcl-2 and decreased basal Bax expression, suppressed cytokine-mediated reduction of Bcl-2, and thereby prevented the release of cytochrome c, Smac/DIABLO and the activation of caspase-9 and -3.
|
136 |
20933054
|
Thus, cytokine-mediated decrease of Bcl-2 expression and the sequentially changed Bax/Bcl-2 ratio are responsible for the release of pro-apoptotic mitochondrial factors, activation of caspase-9, and ultimately caspase-3.
|
137 |
20933054
|
These results indicate that activation of the intrinsic/mitochondrial apoptosis pathway is essential for cytokine-induced beta cell death and the mitochondrial generation of reactive oxygen species, in particular mitochondrial hydrogen peroxide, differentially regulates the Bax/Bcl-2 ratio.
|
138 |
20933054
|
This study demonstrates that pro-inflammatory cytokines strongly modified the expression of the anti-apoptotic protein Bcl-2 and the pro-apoptotic BH3-only proteins Bad, Bim, and Bid in primary rat islets and insulin-producing RINm5F cells.
|
139 |
20933054
|
Overexpression of mitochondrially located catalase (MitoCatalase) specifically increased basal Bcl-2 and decreased basal Bax expression, suppressed cytokine-mediated reduction of Bcl-2, and thereby prevented the release of cytochrome c, Smac/DIABLO and the activation of caspase-9 and -3.
|
140 |
20933054
|
Thus, cytokine-mediated decrease of Bcl-2 expression and the sequentially changed Bax/Bcl-2 ratio are responsible for the release of pro-apoptotic mitochondrial factors, activation of caspase-9, and ultimately caspase-3.
|
141 |
20933054
|
These results indicate that activation of the intrinsic/mitochondrial apoptosis pathway is essential for cytokine-induced beta cell death and the mitochondrial generation of reactive oxygen species, in particular mitochondrial hydrogen peroxide, differentially regulates the Bax/Bcl-2 ratio.
|
142 |
21060752
|
Glucagon like peptide-1 (GLP-1) has effects on preservation of β-cell mass and its insulin secretory function.
|
143 |
21060752
|
Also, Ex-4 treatment decreased GSK3β activation, JNK phosphorylation and caspase-9, -3 activation and recovered the expression of insulin2 mRNA in β-cell lines and secretion of insulin in human islet.
|
144 |
21076025
|
Activity of the intrinsic apoptosis pathway mediator caspase-9 was greater in diabetic atrial tissue, whereas activity of the extrinsic pathway mediator caspase-8 was unchanged between groups.
|
145 |
21667436
|
Immunohistochemical and Western blot analyses revealed the downregulation of Bcl-2, upregulation of Bax, and increased activation of caspase-9 and -3, in diabetic rats, indicating that the apoptosis of taste bud cells may be mediated via the intrinsic mitochondrial pathway in diabetics.
|
146 |
21691071
|
Caspase 3 is activated through caspase 8 instead of caspase 9 during H2O2-induced apoptosis in HeLa cells.
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147 |
21691071
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We measured the activation dynamics of caspase 3 and caspase 9 based on two reporter systems, SCAT 3 and SCAT 9.
|
148 |
21691071
|
We found that caspase 3 activation was earlier than that of caspase 9 following H(2)O(2) treatment.
|
149 |
21691071
|
Caspase 3 was activated rapidly, reaching a maximum in 12±3 min, while the average duration of caspase 9 activation was 21±3 min.
|
150 |
21691071
|
When cells were pretreated with Z-LEHD-fmk, a caspase 9 specific inhibitor, caspase 3 activation and apoptosis by H(2)O(2) treatment were little affected, although the caspase 9 activation was completely inhibited.
|
151 |
21691071
|
When cells were pretreated with Z-DEVD-fmk, a caspase 3 specific inhibitor, the activation of both caspase 3 and caspase 9, as well as apoptosis, were inhibited.
|
152 |
21691071
|
When cells were pretreated with Z-IETD-fmk, a caspase 8 specific inhibitor, the activation of caspase 3 and caspase 9 were significantly delayed.
|
153 |
21691071
|
Our results suggest that, during H H(2)O(2)-induced apoptosis, caspase 3 is activated directly through caspase 8 and is not through the mitochondria-dependent caspase 9 activation.
|
154 |
21691071
|
Caspase 3 is activated through caspase 8 instead of caspase 9 during H2O2-induced apoptosis in HeLa cells.
|
155 |
21691071
|
We measured the activation dynamics of caspase 3 and caspase 9 based on two reporter systems, SCAT 3 and SCAT 9.
|
156 |
21691071
|
We found that caspase 3 activation was earlier than that of caspase 9 following H(2)O(2) treatment.
|
157 |
21691071
|
Caspase 3 was activated rapidly, reaching a maximum in 12±3 min, while the average duration of caspase 9 activation was 21±3 min.
|
158 |
21691071
|
When cells were pretreated with Z-LEHD-fmk, a caspase 9 specific inhibitor, caspase 3 activation and apoptosis by H(2)O(2) treatment were little affected, although the caspase 9 activation was completely inhibited.
|
159 |
21691071
|
When cells were pretreated with Z-DEVD-fmk, a caspase 3 specific inhibitor, the activation of both caspase 3 and caspase 9, as well as apoptosis, were inhibited.
|
160 |
21691071
|
When cells were pretreated with Z-IETD-fmk, a caspase 8 specific inhibitor, the activation of caspase 3 and caspase 9 were significantly delayed.
|
161 |
21691071
|
Our results suggest that, during H H(2)O(2)-induced apoptosis, caspase 3 is activated directly through caspase 8 and is not through the mitochondria-dependent caspase 9 activation.
|
162 |
21691071
|
Caspase 3 is activated through caspase 8 instead of caspase 9 during H2O2-induced apoptosis in HeLa cells.
|
163 |
21691071
|
We measured the activation dynamics of caspase 3 and caspase 9 based on two reporter systems, SCAT 3 and SCAT 9.
|
164 |
21691071
|
We found that caspase 3 activation was earlier than that of caspase 9 following H(2)O(2) treatment.
|
165 |
21691071
|
Caspase 3 was activated rapidly, reaching a maximum in 12±3 min, while the average duration of caspase 9 activation was 21±3 min.
|
166 |
21691071
|
When cells were pretreated with Z-LEHD-fmk, a caspase 9 specific inhibitor, caspase 3 activation and apoptosis by H(2)O(2) treatment were little affected, although the caspase 9 activation was completely inhibited.
|
167 |
21691071
|
When cells were pretreated with Z-DEVD-fmk, a caspase 3 specific inhibitor, the activation of both caspase 3 and caspase 9, as well as apoptosis, were inhibited.
|
168 |
21691071
|
When cells were pretreated with Z-IETD-fmk, a caspase 8 specific inhibitor, the activation of caspase 3 and caspase 9 were significantly delayed.
|
169 |
21691071
|
Our results suggest that, during H H(2)O(2)-induced apoptosis, caspase 3 is activated directly through caspase 8 and is not through the mitochondria-dependent caspase 9 activation.
|
170 |
21691071
|
Caspase 3 is activated through caspase 8 instead of caspase 9 during H2O2-induced apoptosis in HeLa cells.
|
171 |
21691071
|
We measured the activation dynamics of caspase 3 and caspase 9 based on two reporter systems, SCAT 3 and SCAT 9.
|
172 |
21691071
|
We found that caspase 3 activation was earlier than that of caspase 9 following H(2)O(2) treatment.
|
173 |
21691071
|
Caspase 3 was activated rapidly, reaching a maximum in 12±3 min, while the average duration of caspase 9 activation was 21±3 min.
|
174 |
21691071
|
When cells were pretreated with Z-LEHD-fmk, a caspase 9 specific inhibitor, caspase 3 activation and apoptosis by H(2)O(2) treatment were little affected, although the caspase 9 activation was completely inhibited.
|
175 |
21691071
|
When cells were pretreated with Z-DEVD-fmk, a caspase 3 specific inhibitor, the activation of both caspase 3 and caspase 9, as well as apoptosis, were inhibited.
|
176 |
21691071
|
When cells were pretreated with Z-IETD-fmk, a caspase 8 specific inhibitor, the activation of caspase 3 and caspase 9 were significantly delayed.
|
177 |
21691071
|
Our results suggest that, during H H(2)O(2)-induced apoptosis, caspase 3 is activated directly through caspase 8 and is not through the mitochondria-dependent caspase 9 activation.
|
178 |
21691071
|
Caspase 3 is activated through caspase 8 instead of caspase 9 during H2O2-induced apoptosis in HeLa cells.
|
179 |
21691071
|
We measured the activation dynamics of caspase 3 and caspase 9 based on two reporter systems, SCAT 3 and SCAT 9.
|
180 |
21691071
|
We found that caspase 3 activation was earlier than that of caspase 9 following H(2)O(2) treatment.
|
181 |
21691071
|
Caspase 3 was activated rapidly, reaching a maximum in 12±3 min, while the average duration of caspase 9 activation was 21±3 min.
|
182 |
21691071
|
When cells were pretreated with Z-LEHD-fmk, a caspase 9 specific inhibitor, caspase 3 activation and apoptosis by H(2)O(2) treatment were little affected, although the caspase 9 activation was completely inhibited.
|
183 |
21691071
|
When cells were pretreated with Z-DEVD-fmk, a caspase 3 specific inhibitor, the activation of both caspase 3 and caspase 9, as well as apoptosis, were inhibited.
|
184 |
21691071
|
When cells were pretreated with Z-IETD-fmk, a caspase 8 specific inhibitor, the activation of caspase 3 and caspase 9 were significantly delayed.
|
185 |
21691071
|
Our results suggest that, during H H(2)O(2)-induced apoptosis, caspase 3 is activated directly through caspase 8 and is not through the mitochondria-dependent caspase 9 activation.
|
186 |
21691071
|
Caspase 3 is activated through caspase 8 instead of caspase 9 during H2O2-induced apoptosis in HeLa cells.
|
187 |
21691071
|
We measured the activation dynamics of caspase 3 and caspase 9 based on two reporter systems, SCAT 3 and SCAT 9.
|
188 |
21691071
|
We found that caspase 3 activation was earlier than that of caspase 9 following H(2)O(2) treatment.
|
189 |
21691071
|
Caspase 3 was activated rapidly, reaching a maximum in 12±3 min, while the average duration of caspase 9 activation was 21±3 min.
|
190 |
21691071
|
When cells were pretreated with Z-LEHD-fmk, a caspase 9 specific inhibitor, caspase 3 activation and apoptosis by H(2)O(2) treatment were little affected, although the caspase 9 activation was completely inhibited.
|
191 |
21691071
|
When cells were pretreated with Z-DEVD-fmk, a caspase 3 specific inhibitor, the activation of both caspase 3 and caspase 9, as well as apoptosis, were inhibited.
|
192 |
21691071
|
When cells were pretreated with Z-IETD-fmk, a caspase 8 specific inhibitor, the activation of caspase 3 and caspase 9 were significantly delayed.
|
193 |
21691071
|
Our results suggest that, during H H(2)O(2)-induced apoptosis, caspase 3 is activated directly through caspase 8 and is not through the mitochondria-dependent caspase 9 activation.
|
194 |
21691071
|
Caspase 3 is activated through caspase 8 instead of caspase 9 during H2O2-induced apoptosis in HeLa cells.
|
195 |
21691071
|
We measured the activation dynamics of caspase 3 and caspase 9 based on two reporter systems, SCAT 3 and SCAT 9.
|
196 |
21691071
|
We found that caspase 3 activation was earlier than that of caspase 9 following H(2)O(2) treatment.
|
197 |
21691071
|
Caspase 3 was activated rapidly, reaching a maximum in 12±3 min, while the average duration of caspase 9 activation was 21±3 min.
|
198 |
21691071
|
When cells were pretreated with Z-LEHD-fmk, a caspase 9 specific inhibitor, caspase 3 activation and apoptosis by H(2)O(2) treatment were little affected, although the caspase 9 activation was completely inhibited.
|
199 |
21691071
|
When cells were pretreated with Z-DEVD-fmk, a caspase 3 specific inhibitor, the activation of both caspase 3 and caspase 9, as well as apoptosis, were inhibited.
|
200 |
21691071
|
When cells were pretreated with Z-IETD-fmk, a caspase 8 specific inhibitor, the activation of caspase 3 and caspase 9 were significantly delayed.
|
201 |
21691071
|
Our results suggest that, during H H(2)O(2)-induced apoptosis, caspase 3 is activated directly through caspase 8 and is not through the mitochondria-dependent caspase 9 activation.
|
202 |
21691071
|
Caspase 3 is activated through caspase 8 instead of caspase 9 during H2O2-induced apoptosis in HeLa cells.
|
203 |
21691071
|
We measured the activation dynamics of caspase 3 and caspase 9 based on two reporter systems, SCAT 3 and SCAT 9.
|
204 |
21691071
|
We found that caspase 3 activation was earlier than that of caspase 9 following H(2)O(2) treatment.
|
205 |
21691071
|
Caspase 3 was activated rapidly, reaching a maximum in 12±3 min, while the average duration of caspase 9 activation was 21±3 min.
|
206 |
21691071
|
When cells were pretreated with Z-LEHD-fmk, a caspase 9 specific inhibitor, caspase 3 activation and apoptosis by H(2)O(2) treatment were little affected, although the caspase 9 activation was completely inhibited.
|
207 |
21691071
|
When cells were pretreated with Z-DEVD-fmk, a caspase 3 specific inhibitor, the activation of both caspase 3 and caspase 9, as well as apoptosis, were inhibited.
|
208 |
21691071
|
When cells were pretreated with Z-IETD-fmk, a caspase 8 specific inhibitor, the activation of caspase 3 and caspase 9 were significantly delayed.
|
209 |
21691071
|
Our results suggest that, during H H(2)O(2)-induced apoptosis, caspase 3 is activated directly through caspase 8 and is not through the mitochondria-dependent caspase 9 activation.
|
210 |
22138235
|
Moreover, it increased oxidative stress (decreased antioxidant enzyme activities and GSH/GSSG ratio, increased xanthine oxidase enzyme activity, lipid peroxidation, protein carbonylation and ROS generation) and enhanced the proinflammatory cytokines levels, activity of myeloperoxidase and nuclear translocation of NFκB in the cardiac tissue of the experimental animals.
|
211 |
22138235
|
In addition, taurine increased GLUT 4 translocation to the cardiac membrane by enhanced phosphorylation of IR and IRS1 at tyrosine and Akt at serine residue in the heart.
|
212 |
22138235
|
Results also suggest that taurine could protect cardiac tissue from ALX induced apoptosis via the regulation of Bcl2 family and caspase 9/3 proteins.
|
213 |
22155658
|
Further, western blot analysis revealed the activation of caspases family proteins viz., caspase 8, caspase-9 and caspase-3.
|
214 |
22155658
|
An increase in the expression of Bax mRNA concomitant with a decrease in mRNA of Bcl-2 in BEHP treated K562 cells was also observed.
|
215 |
22302365
|
In addition, hyperglycemia enhanced the levels of proinflammatory cytokins (TNF-α, IL-6, IL-1β) and Na(+)--K(+)-ATPase activity with a concomitant reduction in NO content and eNOS expression in diabetic kidney.
|
216 |
22302365
|
However, taurine administration decreased the elevated blood glucose and proinflammatory cytokine levels, reduced renal oxidative stress (via decrease in xanthine oxidase activity, AGEs formation and inhibition of p47phox/CYP2E1 pathways), improved renal function and protected renal tissue from alloxan-induced apoptosis via the regulation of Bcl-2 family and caspase-9/3 proteins.
|
217 |
22347430
|
To this end, we presently evaluated the role of the transcription factor CCAAT/enhancer binding protein delta (C/EBPδ) on β-cell apoptosis and production of inflammatory mediators in the rat insulinoma INS-1E cells, in purified primary rat β-cells and in human islets.
|
218 |
22347430
|
Small interfering RNA-mediated C/EBPδ silencing exacerbated IL-1β+IFN-γ-induced caspase 9 and 3 cleavage and apoptosis in these cells.
|
219 |
22347430
|
C/EBPδ deficiency increased the up-regulation of the transcription factor CHOP in response to cytokines, enhancing expression of the pro-apoptotic Bcl-2 family member BIM.
|
220 |
22347430
|
Interfering with C/EBPδ and CHOP or C/EBPδ and BIM in double knockdown approaches abrogated the exacerbating effects of C/EBPδ deficiency on cytokine-induced β-cell apoptosis, while C/EBPδ overexpression inhibited BIM expression and partially protected β-cells against IL-1β+IFN-γ-induced apoptosis.
|
221 |
22347430
|
Furthermore, C/EBPδ silencing boosted cytokine-induced production of the chemokines CXCL1, 9, 10 and CCL20 in β-cells by hampering IRF-1 up-regulation and increasing STAT1 activation in response to cytokines.
|
222 |
22796564
|
Furthermore, treatment with ALA down-regulated the Bax expression and the release of cytochrome c and AIF translocation, but up-regulated the Bcl-2 expression in SCs.
|
223 |
22796564
|
Treatment with ALA attenuated the activation of caspase-3 and caspase-9 and minimized the cleavage of PARP in SCs.
|
224 |
22940631
|
The protein levels of synaptophysin, a marker of synaptic integrity, and caspase 9 activity were also evaluated in cortical and hippocampal homogenates.
|
225 |
22940631
|
In addition, higher MDA levels and decreased GSH/GSSG, α-tocopherol levels, and aconitase, glutathione peroxidase and MnSOD activities were observed in both groups of animals.
|
226 |
23238821
|
The apoptosis and senescence of NP cells was investigated by terminal deoxyribonucleotidyl transferase (TDT)-mediated dUTP-digoxigenin nick end labeling (TUNEL) assay, immunohistochemistry, and Western blot for caspase3, caspase8, caspase9, and p16lnk4A (increased in cellular senescence).
|
227 |
23238821
|
The proteoglycan and collagen II in the extracellular matrix and the aggrecan and collagen II mRNA expression in NP cells of diabetic rats were decreased compared with the control group.
|
228 |
23238821
|
Diabetes increased apoptosis of NP cells and led to activations of initiators of intrinsic (caspases-9) and extrinsic (caspase-8) pathways as well as their common executioner (caspase-3).
|
229 |
14978257
|
Phorbol 12-myristate 13-acetate protects Jurkat cells from methylglyoxal-induced apoptosis by preventing c-Jun N-terminal kinase-mediated leakage of cytochrome c in an extracellular signal-regulated kinase-dependent manner.
|
230 |
14978257
|
We showed previously that Jurkat cells treated with MG rapidly undergo apoptosis via c-Jun N-terminal kinase (JNK) activation.
|
231 |
14978257
|
The results showed the following: 1) PMA can prevent MG-induced apoptosis; 2) triggering of this antiapoptotic signal depends on the mitogen-activated protein kinase kinase/extracellular signal-regulated kinase (ERK) pathway; 3) PMA inhibits MG-induced activation of caspase-3 and caspase-9, release of cytochrome c, and decline of mitochondrial membrane potential, but it does not affect MG-induced JNK activation; 4) the ERK pathway modulates outer mitochondrial membrane permeability and regulates the mitochondrial death machinery; and 5) activated ERK prevents JNK-induced leakage of cytochrome c from isolated mitochondria.
|
232 |
14978257
|
Taken together, these results suggest that PMA-induced ERK activation can protect Jurkat cells from methylglyoxal-induced apoptosis and that activated ERK exerts its antiapoptotic effects on mitochondria by inhibiting activated JNK-induced permeabilization of the outer mitochondrial membrane.
|