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PMID |
Sentence |
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12882905
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Insulin resistance in tetracycline-repressible Munc18c transgenic mice.
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12882905
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To investigate the physiological effects of modulating the abundance of Munc18c or syntaxin 4 (Syn4) proteins on the regulation of glucose homeostasis in vivo, we generated tetracycline-repressible transgenic mice that overexpress either Munc18c or Syn4 proteins in skeletal muscle, pancreas and adipose tissue seven-, five-, and threefold over endogenous protein, respectively.
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12882905
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Munc18c transgenic mice displayed whole-body insulin resistance during hyperinsulinemic-euglycemic clamp resulting from >41% reductions in skeletal muscle and white adipose tissue glucose uptake, but without alteration of hepatic insulin action.
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12882905
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Glucose intolerance in Munc18c transgenic mice was reversed by repression of transgene expression using tetracycline or by simultaneous overexpression of Syn4 protein.
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5 |
12882905
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In addition, Munc18c transgenic mice had depressed serum insulin levels, reflecting a threefold reduction in insulin secretion from islets isolated therefrom, thus uncovering roles for Munc18c and/or Syn4 in insulin granule exocytosis.
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6 |
12882905
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Taken together, these results indicate that balance, more than absolute abundance, of Munc18c and Syn4 proteins directly affects whole-body glucose homeostasis through alterations in insulin secretion and insulin action.
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7 |
12882905
|
Insulin resistance in tetracycline-repressible Munc18c transgenic mice.
|
8 |
12882905
|
To investigate the physiological effects of modulating the abundance of Munc18c or syntaxin 4 (Syn4) proteins on the regulation of glucose homeostasis in vivo, we generated tetracycline-repressible transgenic mice that overexpress either Munc18c or Syn4 proteins in skeletal muscle, pancreas and adipose tissue seven-, five-, and threefold over endogenous protein, respectively.
|
9 |
12882905
|
Munc18c transgenic mice displayed whole-body insulin resistance during hyperinsulinemic-euglycemic clamp resulting from >41% reductions in skeletal muscle and white adipose tissue glucose uptake, but without alteration of hepatic insulin action.
|
10 |
12882905
|
Glucose intolerance in Munc18c transgenic mice was reversed by repression of transgene expression using tetracycline or by simultaneous overexpression of Syn4 protein.
|
11 |
12882905
|
In addition, Munc18c transgenic mice had depressed serum insulin levels, reflecting a threefold reduction in insulin secretion from islets isolated therefrom, thus uncovering roles for Munc18c and/or Syn4 in insulin granule exocytosis.
|
12 |
12882905
|
Taken together, these results indicate that balance, more than absolute abundance, of Munc18c and Syn4 proteins directly affects whole-body glucose homeostasis through alterations in insulin secretion and insulin action.
|
13 |
12882905
|
Insulin resistance in tetracycline-repressible Munc18c transgenic mice.
|
14 |
12882905
|
To investigate the physiological effects of modulating the abundance of Munc18c or syntaxin 4 (Syn4) proteins on the regulation of glucose homeostasis in vivo, we generated tetracycline-repressible transgenic mice that overexpress either Munc18c or Syn4 proteins in skeletal muscle, pancreas and adipose tissue seven-, five-, and threefold over endogenous protein, respectively.
|
15 |
12882905
|
Munc18c transgenic mice displayed whole-body insulin resistance during hyperinsulinemic-euglycemic clamp resulting from >41% reductions in skeletal muscle and white adipose tissue glucose uptake, but without alteration of hepatic insulin action.
|
16 |
12882905
|
Glucose intolerance in Munc18c transgenic mice was reversed by repression of transgene expression using tetracycline or by simultaneous overexpression of Syn4 protein.
|
17 |
12882905
|
In addition, Munc18c transgenic mice had depressed serum insulin levels, reflecting a threefold reduction in insulin secretion from islets isolated therefrom, thus uncovering roles for Munc18c and/or Syn4 in insulin granule exocytosis.
|
18 |
12882905
|
Taken together, these results indicate that balance, more than absolute abundance, of Munc18c and Syn4 proteins directly affects whole-body glucose homeostasis through alterations in insulin secretion and insulin action.
|
19 |
12882905
|
Insulin resistance in tetracycline-repressible Munc18c transgenic mice.
|
20 |
12882905
|
To investigate the physiological effects of modulating the abundance of Munc18c or syntaxin 4 (Syn4) proteins on the regulation of glucose homeostasis in vivo, we generated tetracycline-repressible transgenic mice that overexpress either Munc18c or Syn4 proteins in skeletal muscle, pancreas and adipose tissue seven-, five-, and threefold over endogenous protein, respectively.
|
21 |
12882905
|
Munc18c transgenic mice displayed whole-body insulin resistance during hyperinsulinemic-euglycemic clamp resulting from >41% reductions in skeletal muscle and white adipose tissue glucose uptake, but without alteration of hepatic insulin action.
|
22 |
12882905
|
Glucose intolerance in Munc18c transgenic mice was reversed by repression of transgene expression using tetracycline or by simultaneous overexpression of Syn4 protein.
|
23 |
12882905
|
In addition, Munc18c transgenic mice had depressed serum insulin levels, reflecting a threefold reduction in insulin secretion from islets isolated therefrom, thus uncovering roles for Munc18c and/or Syn4 in insulin granule exocytosis.
|
24 |
12882905
|
Taken together, these results indicate that balance, more than absolute abundance, of Munc18c and Syn4 proteins directly affects whole-body glucose homeostasis through alterations in insulin secretion and insulin action.
|
25 |
15331531
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Syntaxin 4 transgenic mice exhibit enhanced insulin-mediated glucose uptake in skeletal muscle.
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26 |
15331531
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Insulin-stimulated translocation of GLUT4 vesicles from an intracellular compartment to the plasma membrane in 3T3L1 adipocytes is mediated through a syntaxin 4 (Syn4)- and Munc18c-dependent mechanism.
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27 |
15331531
|
Increases in Syn4 caused increases in Munc18c protein, indicating that Syn4 regulates Munc18c expression in vivo.
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28 |
15331531
|
Insulin-stimulated glucose uptake in skeletal muscle was increased by twofold in Syn4 transgenic mice compared with wild-type mice as assessed by hyperinsulinemic-euglycemic clamp analysis, consistent with a twofold increase in insulin-stimulated GLUT4 translocation in skeletal muscle.
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29 |
15331531
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Moreover, insulin content and glucose-stimulated insulin secretion by islets isolated from Syn4 transgenic mice did not differ from that of wild-type mice.
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30 |
15331531
|
In sum, these data suggest that increasing the number of Syn4-Munc18c "fusion sites" at the plasma membrane of skeletal muscle increases the amount of GLUT4 available to increase the overall rate of insulin-mediated glucose uptake in vivo.
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31 |
15331531
|
Syntaxin 4 transgenic mice exhibit enhanced insulin-mediated glucose uptake in skeletal muscle.
|
32 |
15331531
|
Insulin-stimulated translocation of GLUT4 vesicles from an intracellular compartment to the plasma membrane in 3T3L1 adipocytes is mediated through a syntaxin 4 (Syn4)- and Munc18c-dependent mechanism.
|
33 |
15331531
|
Increases in Syn4 caused increases in Munc18c protein, indicating that Syn4 regulates Munc18c expression in vivo.
|
34 |
15331531
|
Insulin-stimulated glucose uptake in skeletal muscle was increased by twofold in Syn4 transgenic mice compared with wild-type mice as assessed by hyperinsulinemic-euglycemic clamp analysis, consistent with a twofold increase in insulin-stimulated GLUT4 translocation in skeletal muscle.
|
35 |
15331531
|
Moreover, insulin content and glucose-stimulated insulin secretion by islets isolated from Syn4 transgenic mice did not differ from that of wild-type mice.
|
36 |
15331531
|
In sum, these data suggest that increasing the number of Syn4-Munc18c "fusion sites" at the plasma membrane of skeletal muscle increases the amount of GLUT4 available to increase the overall rate of insulin-mediated glucose uptake in vivo.
|
37 |
15331531
|
Syntaxin 4 transgenic mice exhibit enhanced insulin-mediated glucose uptake in skeletal muscle.
|
38 |
15331531
|
Insulin-stimulated translocation of GLUT4 vesicles from an intracellular compartment to the plasma membrane in 3T3L1 adipocytes is mediated through a syntaxin 4 (Syn4)- and Munc18c-dependent mechanism.
|
39 |
15331531
|
Increases in Syn4 caused increases in Munc18c protein, indicating that Syn4 regulates Munc18c expression in vivo.
|
40 |
15331531
|
Insulin-stimulated glucose uptake in skeletal muscle was increased by twofold in Syn4 transgenic mice compared with wild-type mice as assessed by hyperinsulinemic-euglycemic clamp analysis, consistent with a twofold increase in insulin-stimulated GLUT4 translocation in skeletal muscle.
|
41 |
15331531
|
Moreover, insulin content and glucose-stimulated insulin secretion by islets isolated from Syn4 transgenic mice did not differ from that of wild-type mice.
|
42 |
15331531
|
In sum, these data suggest that increasing the number of Syn4-Munc18c "fusion sites" at the plasma membrane of skeletal muscle increases the amount of GLUT4 available to increase the overall rate of insulin-mediated glucose uptake in vivo.
|