Hyperinsulinemia, is a condition in which there are excess levels of insulin circulating in the blood relative to the level of glucose. While it is often mistaken for diabetes or hyperglycaemia, hyperinsulinemia can result from a variety of metabolic diseases and conditions. While hyperinsulinemia is often seen in people with early stage type 2 diabetes mellitus, it is not the cause of the condition and is only one symptom of the disease. Type 1 diabetes only occurs when pancreatic beta-cell function is impaired. Hyperinsulinemia can be seen in a variety of conditions including diabetes mellitus type 2, in neonates and in drug induced hyperinsulinemia. It can also occur in congenital hyperinsulism, including nesidioblastosis.

Hyperinsulinemia is associated with hypertensionobesitydyslipidemia, and glucose intolerance.[1] These conditions are collectively known as Metabolic syndrome.[2] This close association between hyperinsulinemia and conditions of metabolic syndrome suggest related or common mechanisms of pathogenicity.[1] Hyperinsulinemia has been shown to “play a role in obese hypertension by increasing renal sodium retention”.[1]

In type 2 diabetes, the cells of the body become resistant to the effects of insulin as the receptors which bind to the hormone become less sensitive to insulin concentrations resulting in hyperinsulinemia and disturbances in insulin release.[3] With a reduced response to insulin, the beta cells of the pancreas secrete increasing amounts of insulin in response to the continued high blood glucose levels resulting in hyperinsulinemia. In insulin resistant tissues, a threshold concentration of insulin is reached causing the cells to uptake glucose and therefore decreases blood glucose levels. Studies have shown that the high levels of insulin resulting from insulin resistance might enhance insulin resistance.[3]

Studies on mice with genetically reduced circulating insulin suggest that hyperinsulinemia plays a causal role in high fat diet-induced obesity. In this study, mice with reduced insulin levels expended more energy and had fat cells that were reprogrammed to burn some energy as heat.[4]

Hyperinsulinemia in neonates can be the result of a variety of environmental and genetic factors. If the mother of the infant is a diabetic, and does not properly control her blood glucose levels, the hyperglycemic maternal blood can create a hyperglycemic environment in the fetus. To compensate for the increased blood glucose levels, fetal pancreatic beta cells can undergo hyperplasia. The rapid division of beta cells results in increased levels of insulin being secreted to compensate for the high blood glucose levels. Following birth, the hyperglycemic maternal blood is no longer accessible to the neonate resulting in a rapid drop in the newborn’s blood glucose levels. As insulin levels are still elevated this may result in hypoglycemia. To treat the condition, high concentration doses of glucose are given to the neonate as required maintaining normal blood glucose levels. The hyperinsulinemia condition subsides after one to two days.[5] -wiki

SCIENTIFIC STUDIES

  1. 1157-50 Hyperinsulinemia is associated with coronary endothelial dysfunction in obese and nondiabetic patients
  2.  130 DIFFERENTIAL EFFECTS OF ACUTE AND PROLONGED HYPERINSULINEMIA ON LEUCINE METABOLISM IN CIRRHOTIC AND NORMAL …
  3.  136 NARINGENIN PREVENTS THE DYSLIPIDEMIA, APOB OVERPRODUCTION AND HYPERINSULINEMIA IN LDL-RECEPTOR NULL MICE WITH DIET …
  4.  252 EFFECT OF HYPERINSULINEMIA ON AMINO ACID UTILIZATION INDEPENDENT OF GLUCOSE METABOLISM IN THE OVINE FETUS.
  5.  341 Prevention by Trimetazidine of the alterations induced by insulin dependence or hyperinsulinemia on mitochondrial respiration in permeabilized …
  6.  3530 Hyperinsulinemia as an independent risk factor for cardiovascular mortality in non-diabetic European men and women
  7.  3P-0787 Relationship between hyperinsulinemia and particle size of remnant-like lipoprotein particles in patients with impaired glucose tolerance
  8.  406 Effects of long term hyperinsulinemia and b‐blockade of left ventricular mass, structure, function and gene expression
  9.  A Positive Energy Balance in Lean Subjects Induces Hyperinsulinemia by Decreased Hepatic Clearance and Increased Insulin Secretion Which Is Not …
  10.  A Preterm Very Low Birth Weight Male Neonate with Refractory Hypoglycemia and Hyperinsulinemia and Hyperammonemia: A Rare Case Report
  11.  A truly deadly quartet: obesity, hypertension, hypertriglyceridemia, and hyperinsulinemia
  12.  Absence of severe hyperinsulinemia after pancreas/kidney transplantation with peripheral venous drainage
  13.  Acute elevation of NEFA causes hyperinsulinemia without effect on insulin secretion rate in healthy human subjects
  14.  Acute hyperinsulinemia is associated with increased circulating levels of adrenomedullin in patients with type 2 diabetes mellitus
  15.  Acute Hyperinsulinemia Restrains Endotoxin-induced Systemic Inflammatory ResponseAn Experimental Study in a Porcine Model
  16.  Additive effects of hyperinsulinemia and ischemia on myocardial GLUT1 and GLUT4 translocation in vivo
  17.  AICAR (5-aminoimidazole-4-carboxamide ribonucleoside) ameliorates hyperglycemia and hyperinsulinemia in type 2 diabetic mice
  18.  Alterations in cochlear function during induced acute hyperinsulinemia in an animal model
  19.  Angiotensin II receptor antagonism and ace inhibition ameliorate hyperinsulinemia and obesity in a murine model of polygenic obesity
  20.  Antidiabetogenic Effects of Chromium Mitigate Hyperinsulinemia-Induced Cellular Insulin Resistance via Correction of Plasma Membrane Cholesterol …
  21.  Application and nursing of euglycemic hyperinsulinemia clamp technique [J]
  22.  Attenuation of hyperinsulinemia in polycystic ovary syndrome: What are the options?
  23.  Chronic central hyperinsulinemia transiently decreases food intake without changing arterial pressure and heart rate in rats