A model for the relationship between ionic and metabolic oscillations and plasma insulin oscillations is presented. It is argued that the pancreatic -cell in vivo displays two intrinsic frequencies that are important for the regulation of plasma insulin oscillations. The rapid oscillatory activity (2–7 oscillations [osc] per minute), which is evident in both ionic and metabolic events, causes t...

The purpose of this study was to investigate whether an amino acid mixture increases glucose uptake across perfused rodent hindlimb muscle in the presence and absence of a submaximal insulin concentration, and if the increase in glucose uptake is related to an increase in GLUT4 plasma membrane density. Sprague-Dawley rats were separated into one of four treatment groups: basal, amino acid mixtu...

In traditional practice medicine, plants are used in many countries to control diabetes mellitus. The hypoglycaemic actions of these medicinal plants are beings studied. Fenugreek (Trigonella foenum graecum) has been documented as a traditional treatment of diabetes. In the present study, oral administration of alcoholic fenugreek extract (0.1, 0.25, 0.5 g/kg body wt.) and glibenclamide (600 mg...

The rates of muscle glucose uptake of trained (TR) and untrained (UT) obese Zucker rats were assessed by hindlimb perfusion under basal conditions (no insulin) in the presence of a maximally stimulating concentration of insulin (10 mU/ml) and after muscle contraction elicited by electrical stimulation of the sciatic nerve. Perfusate contained 28 mM glucose and 7.5 microCi/mmol of 2-deoxy-D-[3H]...

In traditional practice medicine, plants are used in many countries to control diabetes mellitus. The hypoglycaemic actions of these medicinal plants are beings studied. Fenugreek (Trigonella foenum graecum) has been documented as a traditional treatment of diabetes. In the present study, oral administration of alcoholic fenugreek extract (0.1, 0.25, 0.5 g/kg body wt.) and glibenclamide (600 mg...

Intravenous infusion of 1· 5 mg adrenaline over 30 min into adult Merino wethers (50 kg body weight), increased glucose, lactate, and free fatty acid (FFA) concentrations in plasma much more than did a single rapid intravenous injection of the same amount. There was no increase in plasma insulin concentration during adrenaline infusion or after adrenaline injection. There was a logarithmic rela...

background: polycystic ovary syndrome (pcos), a common endocrine disorder, is associated with infertility, menstrual dysfunction, hirsutism and frequent miscarriages. insulin resistance, as a major cause of pcos, represents a disorder with increase in inflammatory markers and risk of type 2 diabetes. we aimed to investigate whether inflammatory markers, including c-reactive protein and c3 (comp...

OBJECTIVE: Some data are available on the association between components of the insulin resistance syndrome and serum ferritin. Insulin resistance is observed in patients with polycystic ovary syndrome (PCOS) We hypothesize that body iron stores might be increased in these women. MATERIALS AND METHODS: Two hundred and six people (103 PCOS patients and 103 healthy women who were matched for a...

In adults, glucose infusion results in a decreased glucose production rate (GPR) as a mechanism for maintaining euglycemia. To document the development of glucose homeostasis, we derived the GPR in 23 preterm appropriate for gestational age infants, 14 term appropriate for gestational age infants, and in 6 adults. After a 3-h fast, the average plasma glucose and insulin concentration was measur...