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Insulin resistance in essential hypertension is characterized by impaired insulin stimulation of blood flow in skeletal muscle. 1998

H Laine, and M J Knuuti, and U Ruotsalainen, and M Raitakari, and H Iida, and J Kapanen, and O Kirvelä, and M Haaparanta, and H Yki-Järvinen, and P Nuutila
Department of Medicine, University of Turku, Finland.

OBJECTIVE To determine whether insulin-stimulated blood flow in patients with mild essential hypertension is altered. METHODS Eleven untreated mildly hypertensive patients [aged 35 +/- 2 years, body mass index 25.1 +/- 0.4 kg/m2, mean arterial pressure 110 +/- 2 mmHg (means +/- SEM) and 10 matched normotensive subjects (mean arterial pressure 94 +/- 3 mmHg). METHODS Blood flow was quantitated directly in skeletal muscle both basally and during supraphysiologic hyperinsulinemia (serum insulin approximately = 450 mU/l) using radiowater ([15O]H2O) and positron emission tomography. Whole-body and femoral muscle glucose uptakes were determined using the euglycemic insulin clamp technique, [18F]-2-fluoro-2-deoxy-D-glucose and positron emission tomography. RESULTS Rates of whole-body and femoral muscle glucose uptake were significantly lower in the hypertensive than in the normotensive group. Insulin increased muscle blood flow by 91% in the normotensive group, but only by 33% in the hypertensive group. CONCLUSIONS The ability of insulin to stimulate blood flow in patients with mild essential hypertension is impaired.

UI MeSH Term Description Entries
D006973 Hypertension Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more. Blood Pressure, High,Blood Pressures, High,High Blood Pressure,High Blood Pressures
D007328 Insulin A 51-amino acid pancreatic hormone that plays a major role in the regulation of glucose metabolism, directly by suppressing endogenous glucose production (GLYCOGENOLYSIS; GLUCONEOGENESIS) and indirectly by suppressing GLUCAGON secretion and LIPOLYSIS. Native insulin is a globular protein comprised of a zinc-coordinated hexamer. Each insulin monomer containing two chains, A (21 residues) and B (30 residues), linked by two disulfide bonds. Insulin is used as a drug to control insulin-dependent diabetes mellitus (DIABETES MELLITUS, TYPE 1). Iletin,Insulin A Chain,Insulin B Chain,Insulin, Regular,Novolin,Sodium Insulin,Soluble Insulin,Chain, Insulin B,Insulin, Sodium,Insulin, Soluble,Regular Insulin
D007333 Insulin Resistance Diminished effectiveness of INSULIN in lowering blood sugar levels: requiring the use of 200 units or more of insulin per day to prevent HYPERGLYCEMIA or KETOSIS. Insulin Sensitivity,Resistance, Insulin,Sensitivity, Insulin
D008297 Male Males
D012039 Regional Blood Flow The flow of BLOOD through or around an organ or region of the body. Blood Flow, Regional,Blood Flows, Regional,Flow, Regional Blood,Flows, Regional Blood,Regional Blood Flows
D001786 Blood Glucose Glucose in blood. Blood Sugar,Glucose, Blood,Sugar, Blood
D005947 Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Dextrose,Anhydrous Dextrose,D-Glucose,Glucose Monohydrate,Glucose, (DL)-Isomer,Glucose, (alpha-D)-Isomer,Glucose, (beta-D)-Isomer,D Glucose,Dextrose, Anhydrous,Monohydrate, Glucose
D006439 Hemodynamics The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM. Hemodynamic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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