Insulin—a hormone critical for the control of blood glucose—is first synthesized as a longer prohormone. During its maturation, a peptide, C-peptide, is cleaved from the protein, but has been thought to be biologically inert. [HN2], [HN3] Defying the rule that peptide hormones act only by binding to stereospecific receptors, Ido et al. (1) report on page 563 of this issue that C-peptide not onl...

Cardiorenal Research La , Rochester, Minnesota; a innesota. This work was O1 HL36634 and PO1 H tional Research (grant no lingham, Ms. Heublein, D the use of urinary C-type hey have no relationships pt received November 13 cepted December 5, 2012 his study was conducted to determine whether urinary excretion of C-type natriuretic peptide (CNP) is elevated in acute decompensated heart failure (AD...

Background Considering the increasing prevalence of type 1 diabetes mellitus (T1DM) as an autoimmune disease in recent years and the positive effects of vitamin D (VD) on this disease, especially the preventive effect of VD on progressive reduction of pancreatic β-cells, we aimed to investigate the effect of VD on pancreatic β-cell function in T1DM patients. Materials and Methods From Sep 2016 ...

A well-established approach for the estimation of insulin secretion in vivo is based on the measurement of plasma C-peptide. C-peptide is secreted by pancreatic -cells in equimolar amounts with insulin, but unlike insulin, C-peptide is not extracted by the liver and has a constant peripheral clearance. Thus, the systemic (venous) appearance of C-peptide equals the pancreatic release of insulin....

BACKGROUND This study aimed to investigate whether stimulated C-peptide is associated with microvascular complications in type 2 diabetes mellitus (DM). METHODS A cross-sectional study was conducted in 192 type 2 diabetic patients. Plasma basal C-peptide and stimulated C-peptide were measured before and 6 minutes after intravenous injection of 1 mg glucagon. The relationship between C-peptide...