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PMID |
Sentence |
1 |
21801810
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Our data suggest that in 3T3-L1 adipocytes NPY inhibits insulin-stimulated glucose uptake in a GLUT4-dependent manner.
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2 |
21801810
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This study provides evidence that NPY impairs the insulin sensitivity of adipocytes and suggests that the Y1 receptor could be a potential therapeutic target for type 2 diabetes.
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3 |
2527701
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Alterations of hypothalamic neuropeptide Y, which has potent experimental effects on hypothalamo-pituitary function, may contribute to certain neuroendocrine disturbances in insulin-deficient diabetes.
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4 |
2097094
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Therefore, we examined the influence of NPY alone and together with noradrenaline (NA) on insulin release in the rat.
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5 |
2097094
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When infused alone for 30 min under basal conditions, NPY increased basal plasma insulin concentrations by 32 +/- 13 microU/ml at the highest dose level tested (68 pmol/min), as compared to +7 +/- 7 microU/ml in the controls (p less than 0.05).
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6 |
2097094
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In contrast, NPY at 17 pmol/min reduced the plasma insulin response to both glucose (by 11%; p less than 0.001) and to arginine (by 26%; p less than 0.001).
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7 |
2097094
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In isolated rat islets, both NPY (10(-6) M) and NA (10(-6) M) inhibited glucose-stimulated insulin secretion.
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8 |
2097094
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We conclude that, in the rat, NPY and NA both elevate basal plasma insulin levels and inhibit stimulated insulin secretion.
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9 |
2097094
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In combination, NPY also induces a more rapid onset of the inhibitory action of NA on glucose-induced insulin secretion.
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10 |
1551314
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Our results demonstrate that two models of insulin-deficient diabetes in the rat are associated with increased hypothalamic neuropeptide Y mRNA.
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11 |
1437714
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Untreated insulin-deficient diabetes causes hyperphagia and neuroendocrine disturbances that may be partly mediated by increased hypothalamic activity of neuropeptide Y (NPY), a potent central appetite stimulant.
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12 |
8335171
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When diabetic rats were treated for 20 h with s.c. insulin, there was decreased neuropeptide Y mRNA in the arcuate nucleus.
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13 |
8335171
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We conclude that neuropeptide Y mRNA in the arcuate nucleus is responsive to small changes in circulating insulin levels and the response occurs within 20 h.
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14 |
8284270
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Insulin-deficient diabetes and food deprivation markedly increase hypothalamic NPY and NPY mRNA levels, suggesting increased activity of NPYergic pathways in the hypothalamus, which could account for hyperphagia and neuroendocrine changes in these conditions.
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15 |
8194661
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NPY administration also resulted in a pronounced increase in the in vivo insulin-stimulated glucose uptake by adipose tissue but in a marked decrease in uptake by eight different muscle types.
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16 |
7840315
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We hypothesized that corticosteroids and insulin might serve as interacting, reciprocal signals for energy balance, acting on energy acquisition, in part through their effects on hypothalamic NPY, as well as on energy stores.
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17 |
7840315
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Glucocorticoids stimulated and insulin inhibited NPY mRNA and food intake.
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18 |
7840315
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The effects of corticosterone and insulin on food intake may be mediated, in part, through regulation of hypothalamic NPY synthesis and secretion.
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19 |
7479313
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NPY synthesis in the ARC is thought to be regulated by several factors, notably insulin, which may exert an inhibitory action.
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20 |
7479313
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The effects of NPY injected into the PVN and other sites include hyperphagia, reduced energy expenditure and enhanced weight gain, insulin secretion, and stimulation of corticotropin and corticosterone release.
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21 |
8719940
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The study aimed to assess vascular reactivity to noradrenaline with and without neuropeptide Y in diabetic rats, and to determine whether any abnormality could be attributed to insulin deficiency or to hyperglycaemia per se.
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22 |
16177033
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Conversely, insulin (10(-11) to 10(-9) M) significantly inhibited NPY expression stimulated by DEX, and the inhibitory action of insulin was abolished in the presence of TTX.
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23 |
16177033
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The GABAB agonist baclofen significantly inhibited NPY expression stimulated by DEX, and the inhibitory action of insulin was completely abolished in the presence of either the GABAA antagonist bicuculline or the GABAB antagonist CGP35348 (p-3-aminopropyl-p-diethoxymethyl phosphoric acid).
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24 |
16177033
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Experiments in vivo also demonstrated that increases in GAD65 mRNA expression in the arcuate nucleus preceded decreases in the NPY mRNA expression in a fasting-refeeding paradigm and that intracerebroventricular injection of insulin increased GAD65 mRNA expression in the arcuate nucleus in fasted rats.
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25 |
16177033
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These data suggest that insulin inhibits NPY gene expression in the arcuate nucleus through GABAergic systems.
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26 |
16210367
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In contrast, whereas insulin increased proopiomelanocortin mRNA and both insulin and glucose reduced NPY mRNA in arcuate nucleus neurons, neither prevented the fasting-induced suppression in hypophysiotropic TRH mRNA or circulating thyroid hormone levels.
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27 |
18638024
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Arcuate nucleus neuropeptide Y, but not pro-opiomelanocortin, mRNA expression was elevated by STZ treatment and all vagal manipulations; however, exogenous insulin treatment failed to prevent this, in keeping with their previously documented elevated caloric intake.
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28 |
21574956
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The age-related central resistance to leptin and insulin does not reduce their inhibitory effects on the activity of NPY and AgRP neurons.
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29 |
21760856
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We evaluated the effects of insulin-induced improved glycaemic control on leptin, adiponectin, ghrelin, neuropeptide Y (NPY) levels and patient characteristics.
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30 |
21760856
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In both genders, insulin therapy (Group A) was associated with significant (p = 0.003 to <0.001) increases in weight, body mass index and leptin levels and significant decreases in glucose, HbA(1c) and NPY levels.
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31 |
21760856
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Changes in leptin, adiponectin and NPY levels may occur after insulin-induced improved glycaemic control.
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32 |
11179781
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Insulin replacement was also associated with a return of hypothalamic AGRP mRNA (111.7+/-8.3% of controls) and NPY mRNA (125.0+/-8.9% of controls) from the elevated levels that were observed in untreated diabetic rats.
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