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PMID |
Sentence |
1 |
6257880
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When KK mice had been injected with IAP, they responded to epinephrine and isoproterenol more readily than did ddY mice in increasing plasma insulin and glycerol.
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2 |
3051005
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In skeletal muscle exposed to 120 nM amylin for 1 hr, there was a marked decrease in both basal and submaximally insulin-stimulated rates of glycogen synthesis, which resulted in significant reduction in the rates of insulin-stimulated glucose uptake.
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3 |
3051005
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In marked contrast, amylin had no effect on either basal or insulin-stimulated rates of glucose incorporation into either CO2 or triacylglycerol in isolated adipocytes.
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4 |
2655598
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Islet amyloid polypeptide inhibited the glucose-stimulated insulin secretion from isolated rat pancreatic islets, as calcitonin gene-related peptide did, but the fragments failed to inhibit the secretion.
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5 |
2690958
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In normal metabolism, amylin could act in concert with insulin as a signal for the body to switch the site of carbohydrate disposal from glycogen to longer-term stores in adipose tissue, by making skeletal muscle relatively insulin-resistant, whilst at the same time leaving rates of insulin-stimulated carbohydrate metabolism in adipose tissue unaltered.
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6 |
2690958
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As patients with insulin-treated IDDM frequently experience problems with hypoglycaemia, and as amylin acts to modulate the action of insulin in various tissues, it is possible that amylin deficiency may contribute to morbidity in insulin-treated IDDM, perhaps through the loss of a natural damping mechanism which guards against hypoglycaemia under conditions of normal physiology.
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7 |
2695283
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The prevalence of insulin-dependent diabetes in BB rats was increased in the IAP group as compared to controls.
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8 |
2695369
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We also suggest that in the presence of defective proinsulin processing and insulin release, as occurs in NIDDM, hyperglycemia stimulates amylin biosynthesis so that this peptide is deposited in increased quantities in the islet as amyloid.
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9 |
2491258
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Recent studies have also shown that both amylin and CGRP are potent inhibitors of insulin-stimulated glycogen synthesis in skeletal muscle in vitro.
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10 |
2179271
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Treatment with a borderline diabetogenic dose of streptozotocin reduced amylin response without significantly changing the insulin response.
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11 |
1970540
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We determined islet amyloid polypeptide (IAPP) response in plasma to oral and intravenous glucose administration and intravenous insulin injection in nondiabetic subjects.
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12 |
2204154
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Amylin, a novel pancreatic hormone, secreted along with insulin from the pancreatic beta-cells, can modulate insulin effects, to produce insulin resistance in skeletal muscle and liver.
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13 |
2226108
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Lowering fasting blood glucose to normal with a basal insulin supplement reduces endogenous insulin production, and this may be advantageous if accompanying production of islet amyloid polypeptide and islet amyloid formation are also reduced.
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14 |
2227135
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Therefore, amylin and CGRP can cause insulin resistance in vivo and may be implicated in insulin-resistant states such as type II diabetes mellitus.
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15 |
2022302
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During 180-min euglycemic insulin-clamp (21.5 pmol.kg-1.min-1) studies, amylin (50, 200, or 500 pmol.kg-1.min-1; plasma concentration from 3 x 10(-10) to 9 x 10(-9) M) infusion determined a 19-27% reduction in glucose uptake (117.8 +/- 7.0 vs. 145.8 +/- 11.0, 107.1 +/- 9.2 vs. 145.1 +/- 6.7, and 105.0 +/- 7.2 vs. 144.4 +/- 7.0 mumol.kg-1.min-1 at 50, 200, or 500 pmol.kg-1.min-1, respectively, P less than 0.01) versus insulin alone, whereas 10-pmol.kg-1.min-1 amylin infusion (plasma concn 5 x 10(-11) M) failed to affect insulin-mediated glucose disposal.
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16 |
2022302
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Suppression of hepatic glucose production by insulin was unaffected by a 50-pmol.kg-1.min-1 amylin infusion (18.5 +/- 4.3 vs. 21.7 +/- 2.9 mumol.kg-1.min-1), whereas it was slightly but significantly impaired by amylin infusion at 200 pmol.kg-1.min-1 (17.8 +/- 3.9 vs. 24.7 +/- 4.5 mumol.kg-1.min-1, P less than 0.05).
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17 |
2059220
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With all three experimental models, exposure to human amylin acid and human and rat amylin at concentrations as high as 100 nM had no significant effect on rates of insulin or glucagon secretion.
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18 |
2065848
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Fasting plasma islet amyloid polypeptide concentrations and their responses to an oral glucose load were determined in non-diabetic control subjects and patients with abnormal glucose tolerance in relation to the responses of insulin or C-peptide.
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19 |
2065857
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Applied amylin levels of 220 +/- 75 pmol/l (infusion rate of 12.5 pmol/min) antagonized only the insulin action on liver, resulting in a 100% increase of hepatic glucose output.
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20 |
2065857
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Amylin did not affect: 1) the metabolic clearance rate of insulin, 2) the levels of plasma glucagon, epinephrine, norepinephrine, and corticosterone, 3) in vitro insulin binding and insulin-stimulated receptor autophosphorylation.
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21 |
2065857
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This suggests that amylin antagonizes insulin action via binding to a yet unknown receptor.
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22 |
2065857
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In conclusion: amylin causes in vivo insulin resistance and the liver seems the predominant organ regulated by this hormone.
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23 |
2065857
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The in vivo effects of amylin mimic the pathophysiological abnormalities of insulin action in Type 2 diabetes.
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24 |
1860552
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The isolated perfused normal rat pancreas was used to evaluate the effects of glucose and insulin secretagogues, such as arginine, beta-hydroxybutyrate, and gliclazide, on amylin secretion.
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25 |
1950379
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Additionally, amylin can induce peripheral insulin resistance, which might also be a cause for type II diabetes mellitus.
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26 |
1787825
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Amylin decreases insulin-stimulated glucose uptake in skeletal muscle and counteracts the ability of insulin to suppress output of glucose from the liver.
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27 |
1788148
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Amylin also decreased feeding induced by insulin administration without significantly affecting blood glucose levels.
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28 |
18411183
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Islet amyloid polypeptide (IAPP or amylin), first identified as the peptide deposited as amyloid in type-2 diabetic pancreas and insulinoma, turns out to be a peptide produced in the pancreatic beta-cell secretory granule that is costored and coreleased with insulin.
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29 |
1311671
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Amylin significantly reduced insulin secretion in rat insulinoma cell lines (Rin m5F cells) that were stimulated by either isoproterenol and forskolin, but it did not affect insulin secretion stimulated by isobutyl-methylxanthine (IBMX) or dibutyryl cyclic-adenosine monophosphate (db-cAMP).
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30 |
1541236
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It has been reported that islet amyloid polypeptide (IAPP) has insulin antagonistic effects in vivo and in vitro.
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31 |
1563116
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Plasma amylin correlated closely with serum C-peptide (r = .764; p = 0.0001), and to a lesser extent with insulin (r = .595; p = 0.0001) underlining its postulated cosecretion with these peptides.
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32 |
1563587
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To study whether abnormal secretion of islet amyloid polypeptide is involved in the development of insulin resistance and impaired insulin secretion in Type 2 (non-insulin-dependent) diabetes mellitus, we measured islet amyloid polypeptide concentrations in 56 first-degree relatives of Type 2 diabetic subjects and in 10 healthy control subjects.
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33 |
1534057
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These findings suggest that amylin secretion may be preserved in diabetic rats with reduced beta-cell mass and that hyperglycemia may increase amylin production independently of that of insulin, which may be significant in the pathogenesis of non-insulin-dependent diabetes mellitus.
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34 |
1637089
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Islet amyloid polypeptide, or amylin, is co-localized with insulin to the beta-cell secretory granule and is synthesized and released in parallel with insulin in response to a range of physiological and pharmacological stimuli.
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35 |
1407245
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Furthermore, it has been shown that amylin has the potential to antagonize the action of insulin on glucose metabolism by increasing hepatic glucose production and by decreasing muscle, but not adipocyte glucose uptake.
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36 |
8477949
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These findings suggest that amylin may modulate the secretion of insulin from pancreatic beta-cells.
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37 |
8335181
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These findings suggest a mechanism for persistent islet amyloid polypeptide secretion and amyloid accumulation when regulated insulin release is impaired as in Type 2 (non-insulin-dependent) diabetes mellitus and insulinomas.
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38 |
8105694
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To determine if increased secretion of amylin can be implicated in the pathogenesis of non-insulin-dependent diabetes mellitus (NIDDM) in vitro and in vivo, we studied its relationships to insulin in insulin-resistant rats with and without NIDDM.
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39 |
8111613
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Amylin also reduces insulin secretion and induces insulin resistance.
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40 |
8307253
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Pharmacological doses of islet amyloid polypeptide have been shown to inhibit insulin secretion as well as insulin action on peripheral tissues (insulin resistance).
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41 |
8307253
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To examine the role of islet amyloid polypeptide in the pathogenesis of Type 2 diabetes, we have generated transgenic mice with the gene encoding either human islet amyloid polypeptide (which can form amyloid) or rat islet amyloid polypeptide, under control of an insulin promoter.
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42 |
8277951
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Islet amyloid polypeptide (IAPP), a hormonal factor secreted from the pancreatic beta cells, reduces insulin sensitivity in vivo and glycogen synthesis in vitro.
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43 |
8201968
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Moreover, insulin-treated nSTZ rats exhibited decreased amylin to insulin molar ratios compared with saline-treated nSTZ rats (P < .05), which had the same levels as normal rats.
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44 |
7929614
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While amylin induces insulin resistance in skeletal muscle, it does not oppose insulin action in fat and may therefore favor fuel deposition in this tissue.
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45 |
7929617
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This suggests that chronic overproduction of islet amyloid polypeptide "per se" does not cause insulin resistance.
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46 |
7705017
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There is suggestive evidence that amylin acts physiologically in an autocrine manner within the islet to restrain insulin secretion, but conversely there is little indication that this action of amylin plays any role in the development of NIDDM.
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47 |
7705017
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The potential exists for the development of amylin antagonists as pharmacological agents to enhance insulin secretion in NIDDM but antagonism of systematic CGRP would need to be avoided.
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48 |
8884847
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We have investigated whether a possible dysregulation of the storage and function of islet amyloid polypeptide (IAPP) in the endocrine pancreas of 4-month-old spontaneously diabetic Goto-Kakizaki (GK) rats might contribute to the impairment of glucose-induced insulin secretion previously reported in these rats.
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49 |
9421380
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The effect on gastric emptying of hypoglycemia induced by a 5 mU/min insulin infusion (t = 5-90 min) was assessed in conscious rats continuously infused with amylin (50 pmol x kg-1 x min-1; t = -30 to 90 min).
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50 |
12608111
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Amylin modulates insulin sensitivity of skeletal muscle, contributes to the regulation of blood pressure and causes vasodilatation.
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51 |
12941771
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We investigated the role of insulin-degrading enzyme (IDE) in amylin degradation, amyloid deposition, and cytotoxicity in RIN-m5F insulinoma cells.
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52 |
12941771
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The IDE inhibitor bacitracin inhibited amylin degradation by 78% and insulin degradation by 100%.
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53 |
16174639
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Amylin correlated positively with insulin (n = 42; r = 0.67; 95% CI 0.4 to 0.81), birth weight (r = 0.22; 95% CI 0.08 to 0.36), and gestation (r = 0.18; 95% CI 0.03 to 0.32).
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54 |
16492543
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The effect of amylin and amylin agonists (including pramlintide) to inhibit gastric emptying was reversed by insulin-induced hypoglycemia (Gedulin and Young, 1998; Gedulin et al., 1997b,c,d; Young et al., 1996a).
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55 |
16822955
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Although beta-cell-related gene expression (PDX-1, proinsulin I, GLUT2, glucokinase, amylin) and function (insulin content and secretion) are slightly reduced during p8 overexpression, removal of IPTG reverses beta-cell function within 24 h to normal levels.
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56 |
17495860
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We suggest that strict metabolic control and reversing insulin resistance in patients with diabetes may blunt the process of amylin deposition in the kidney and possibly protect renal function in these patients.
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57 |
18430365
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RhGLP-1 (7-36) stimulates the secretion and expression of amylin, and exerts a beneficial effect on the ratio of amylin to insulin mRNA.
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58 |
19146426
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Islet amyloid polypeptide (IAPP), a 37-amino acid polypeptide hormone of the calcitonin family, is colocalized and cosecreted with insulin in secretory granules of pancreatic islet beta cells.
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59 |
20042670
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The islet in type 2 diabetes mellitus (T2DM) is characterized by a deficit in beta cells and islet amyloid derived from islet amyloid polypeptide (IAPP), a protein co-expressed with insulin by beta cells.
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60 |
18370776
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Low Hsps make organs vulnerable to injury, impair the stress response, accelerate systemic inflammation, raise islet amyloid polypeptide, and increase insulin resistance.
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61 |
21218505
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the mechanism by which islet amyloid polypeptide (IAPP) inhibits insulin release is unclear.
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62 |
19456151
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Islet amyloid polypeptide (IAPP or amylin) is a 37-residue peptide hormone associated with glucose metabolism that is cosecreted with insulin by beta-cells in the pancreas.
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63 |
16921545
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However, when hepatocytes were allowed to reaggregate for 4 and 6 days in hydrophobic plates after transduction with NeuroD1, further increases of insulin 2 mRNA were found along with induction of PDX-1, IAPP, NeuroD1, Ngn3, Pax 4, Isl-1, PC1, PC2 and islet glucokinase.
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64 |
21589925
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Plasma amylin levels are elevated in individuals with obesity and insulin resistance.
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65 |
18763075
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In the present study, we investigate effect of amylin on the insulin sensitivity of rat skeletal muscle extensor digitorum longus (EDL) using in vitro intact muscle incubation in combination with metabolic radioactive labeling.
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66 |
18763075
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We found that amylin significantly decreased the insulin-stimulated glucose incorporation into glycogen (p < 0.01) and produced a protein spot of approximately 20 ku in size.
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