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Bromocriptine QR The Biologic Clock
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ADAPTIVE Insulin Resistance MAL-ADAPTIVE Insulin Resistance Insulin resistance begets insulin resistance: hyperinsulinemia in hypothalamus reduces nutrient sensing via increased NE/5HT, overcoming normal spring rise in dopa/decreasing dopa in spring Cincotta AH. et al. Taylor and Francis, Eds Hansen, B Shafrir, E London. 2002. 271-312. Meier AH, Cincotta AH et al. Diabetes Reviews. 1996. 4(4):464-86. Modern Insulin Resistant Man “Locked” Into Seasonal Insulin Resistance Syndrome Physiology (Neuroendocrinology; Winter Condition All Year Long)
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The Biologic Clock Integrator of Signals Uses DOPAMINE SCN Afferent signals to SCN that maintain low dopa set include 1. persistent hyperglycemia, 2. high fat/ high sugar diet, 3. no exercise 4. altered sleep/ wake cycle, 5. stress High Dopa Set AM-Summer Low IR Low Sympathetic tone Hyperglycemia, high fat/sugar diets, altered sleep/wake cycles, no exercise, stress Low Dopa Set PM-Winter High IR High Sympathetic tone Persistent Summer Winter patients with genetically susceptible b-cell Diabetes Mellitus Maladaptive
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Bromocriptine QR: Proposed mechanism of action Morning administration (within 2 hours of waking) of AGENT Corrects Restoration of morning peak in dopaminergic activity (via D2 receptor-mediated activity) Decreased postprandial glucose levels Reduction in insulin resistance Day-long reduction in plasma glucose, TGs and FFAs Sympathetic tone HPA axis tone Hepatic gluconeogenesis FFA and TG Insulin resistance Inflammation/hypercoagulation Low dopaminergic tone in hypothalamus in early morning in diabetes Sympathetic tone HPA axis tone Hepatic gluconeogenesis FFA and TG Insulin resistance Inflammation/hypercoagulation Impaired glucose metabolism, hyperglycemia and insulin resistance Adverse cardiovascular pathology 4 Fonseca. Use of Dopamine agonists in Type-2-Diabetes. Oxford American Pocket Cards. OUP, 2010 Cincotta. Hypothalamic role in Insulin Resistance and insulin Resistance Syndrome. Frontiers in Animal Diabetes Research Series. Taylor and Francis, Eds Hansen, B Shafrir, E London, pp 271-312, 2002
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Bromocriptine Effect on HbA1c in Combination with other OHAs
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