Assays for Insulin, Proinsulin(S) and C-Peptide

Sensitive and specific two-site immunoradiometric assays for human insulin, proinsulin, 65-66 split and 32-33 split proinsulins.

Monoclonal antibody-based two-site immunoradiometric assays are described for human insulin, proinsulin, 65-66 split and 32-33 split proinsulin. The detection limits of the assays lie in the range 0.8-2.5 pM. The assays for 65-66 and 32-33 split proinsulins do not distinguish between these substances and their respective C-terminal di-desamino derivatives. The assay of 65-66 split proinsulin do...

study of comparative effects of harmine and ghrelin agonist on insulin and c-peptide secretion

Aim and Background: The ability to secrete insulin from the islets of Langerhans on the one hand and suppress the factors that increase serum glucose concentrations on the other; It is very important in patients with metabolic disorders such as diabetes. The aim of this study was to compare the effects of harmine with ghrelin agonist (as a suppressor of insulin secretion) on insulin secretion a...

Homogeneous Insulin and C-Peptide Sensors for Rapid Assessment of Insulin and C-Peptide Secretion by the Islets

OBJECTIVE Glucose-stimulated islet insulin or C-peptide secretion experiments are a fundamental tool for studying and assessing islet function. The goal of this work was to develop Ab-based fluorescent homogenous sensors that would allow rapid, inexpensive, near-instantaneous determinations of insulin and C-peptide levels in biological samples. RESEARCH DESIGN AND METHODS Our approach was to ...

Metabolism of proinsulin, insulin, and C-peptide in the rat.

The renal extraction and excretion of bovine proinsulin, insulin, and C-peptide and the contribution of the kidney to their total metabolic clearance rate (MCR) were studied in the rat. Metabolic clearance rates were measured by the constant infusion technique and plasma and urine concentrations of each polypeptide were determined by radioimmunoassay. The MCR of insulin (16.4+/-0.4 ml/min) was ...

Insulin, Glucagon, C-Peptide and Aminoacid Levels Following Liver Transplantation