Aims: To clarify the relationship between depression and glucose metabolism using sensitive measures of insulin resistance, and to assess if remission of depression results in enhanced insulin sensitivity. Methods: An...Aims: To clarify the relationship between depression and glucose metabolism using sensitive measures of insulin resistance, and to assess if remission of depression results in enhanced insulin sensitivity. Methods: An intervention study to quantify changes in insulin sensitivity before and after treatment of depression was carried out. Twenty six Pakistani women with newly diagnosed depression underwent euglycemic insulin clamp to measure insulin sensitivity at inclusion and again after treatment of depression 6 - 8 weeks later. Twenty-three individuals completed both tests. Results: Significant improvement of insulin sensitivity was observed following the treatment of depression. The improved insulin sensitivity remained statistically significant after controlling for confounding factors. Conclusions: This study establishes a relationship between depression and insulin resistance. It demonstrated that insulin sensitivity can be improved by treating depression.展开更多
Aim To investigate the effects of milrinone (a selective phosphodiesteraseIII inhibitor PDE_3 ) on insulin secretion, blood glucose, plasma free fatty acids (FFA) anddose-response relationship, and assess possible eff...Aim To investigate the effects of milrinone (a selective phosphodiesteraseIII inhibitor PDE_3 ) on insulin secretion, blood glucose, plasma free fatty acids (FFA) anddose-response relationship, and assess possible effects of milrinone on glucose metabolism andinsulin sensitivity in conscious rats. Methods The catheterized nonstressed rats were administeredvarious doses of milrinone (1, 5, 25μmoL·kg^(-1)) and were compared with controls. Ahyperinsulinaemic-eugly-caemic clamp was established in counscious rats, andmilrinone(25μmoL·kg^(-1)) and 25% dimethyl sulfoxide (DMSO, as a control) were given at 120 minduring hyperinsulinaemic-euglycaemic clamping. Glucose turnover was determind with by gaschromatograph mass spectrometer (GC-MS). Results After dosing, plasma FFA levels in 3 milrinonegroups significantly increased, compared with the controls and before dosing. The percentages ofelevation of FFA by the different milrinone doses were very similar, 50%, and 52% , 55% for 1, 5,and 25 μmoL·kg^(-1), repectively, at 2 min after dosing. Plasma insulin levels were significantlyelevated in the 5 and 25 μmoL·kg^(-1) groups, and the effect of milrione on glucose concentrationwas detectable only in 25μmoL·kg^(-1) group. During hyperinsulinaemic clamping, there weresignificant increase, in plasma FFA (from 173 +- 15 to 634 +- 87μmoL·kg^(-1)) and hepatic glucoseproduction (HGP), and a significant decrease in glucose infusion rates (GIR) to about 21% and aslight increase in plasma insulin after milrinone treatment. Conclusion Milrinone impaires theability of insulin to suppress lipolysis and HGP, and insulin-mediated glucose utilization inperipheral tissue. Therefore, milrinone administration may induce an acute insulin resistance invivo.展开更多
Diabetes mellitus is a metabolic disease possible to treat via pancreas/islet transplantation but most immunosuppressive drugs are diabetogenic. In this letter, we review current up to date methods to assess insulin a...Diabetes mellitus is a metabolic disease possible to treat via pancreas/islet transplantation but most immunosuppressive drugs are diabetogenic. In this letter, we review current up to date methods to assess insulin action and secretion (using the surrogate indexes) suggesting their use in large studies in populations of pancreas/ islets transplanted patients.展开更多
文摘Aims: To clarify the relationship between depression and glucose metabolism using sensitive measures of insulin resistance, and to assess if remission of depression results in enhanced insulin sensitivity. Methods: An intervention study to quantify changes in insulin sensitivity before and after treatment of depression was carried out. Twenty six Pakistani women with newly diagnosed depression underwent euglycemic insulin clamp to measure insulin sensitivity at inclusion and again after treatment of depression 6 - 8 weeks later. Twenty-three individuals completed both tests. Results: Significant improvement of insulin sensitivity was observed following the treatment of depression. The improved insulin sensitivity remained statistically significant after controlling for confounding factors. Conclusions: This study establishes a relationship between depression and insulin resistance. It demonstrated that insulin sensitivity can be improved by treating depression.
文摘Aim To investigate the effects of milrinone (a selective phosphodiesteraseIII inhibitor PDE_3 ) on insulin secretion, blood glucose, plasma free fatty acids (FFA) anddose-response relationship, and assess possible effects of milrinone on glucose metabolism andinsulin sensitivity in conscious rats. Methods The catheterized nonstressed rats were administeredvarious doses of milrinone (1, 5, 25μmoL·kg^(-1)) and were compared with controls. Ahyperinsulinaemic-eugly-caemic clamp was established in counscious rats, andmilrinone(25μmoL·kg^(-1)) and 25% dimethyl sulfoxide (DMSO, as a control) were given at 120 minduring hyperinsulinaemic-euglycaemic clamping. Glucose turnover was determind with by gaschromatograph mass spectrometer (GC-MS). Results After dosing, plasma FFA levels in 3 milrinonegroups significantly increased, compared with the controls and before dosing. The percentages ofelevation of FFA by the different milrinone doses were very similar, 50%, and 52% , 55% for 1, 5,and 25 μmoL·kg^(-1), repectively, at 2 min after dosing. Plasma insulin levels were significantlyelevated in the 5 and 25 μmoL·kg^(-1) groups, and the effect of milrione on glucose concentrationwas detectable only in 25μmoL·kg^(-1) group. During hyperinsulinaemic clamping, there weresignificant increase, in plasma FFA (from 173 +- 15 to 634 +- 87μmoL·kg^(-1)) and hepatic glucoseproduction (HGP), and a significant decrease in glucose infusion rates (GIR) to about 21% and aslight increase in plasma insulin after milrinone treatment. Conclusion Milrinone impaires theability of insulin to suppress lipolysis and HGP, and insulin-mediated glucose utilization inperipheral tissue. Therefore, milrinone administration may induce an acute insulin resistance invivo.
文摘Diabetes mellitus is a metabolic disease possible to treat via pancreas/islet transplantation but most immunosuppressive drugs are diabetogenic. In this letter, we review current up to date methods to assess insulin action and secretion (using the surrogate indexes) suggesting their use in large studies in populations of pancreas/ islets transplanted patients.
