Tags

Type your tag names separated by a space and hit enter

Effects of C-peptide on microvascular blood flow and blood hemorheology.
Exp Diabesity Res 2004 Jan-Mar; 5(1):51-64ED

Abstract

Beside functional and structural changes in vascular biology, alterations in the rheologic properties of blood cells mainly determines to an impaired microvascular blood flow in patients suffering from diabetes mellitus. Recent investigations provide increasing evidence that impaired C-peptide secretion in type 1 diabetic patients might contribute to the development of microvascular complications. C-peptide has been shown to stimulate endothelial NO secretion by activation of the Ca2+ calmodolin regulated enzyme eNOS. NO himself has the potency to increase cGMP levels in smooth muscle cells and to activate Na+K+ATPase activity and therefore evolves numerous effects in microvascular regulation. In type 1 diabetic patients, supplementation of C-peptide was shown to improve endothelium dependent vasodilatation in an NO-dependent pathway in different vascular compartments. In addition, it could be shown that C-peptide administration in type 1 diabetic patients, results in a redistribution of skin blood flow by increasing nutritive capillary blood flow in favour to subpapillary blood flow. Impaired Na+K+ATPase in another feature of diabetes mellitus in many cell types and is believed to be a pivotal regulator of various cell functions. C-peptide supplementation has been shown to restore Na+K+ATPase activity in different cell types during in vitro and in vivo investigations. In type 1 diabetic patients, C-peptide supplementation was shown to increase erythrocyte Na+K+ATPase activity by about 100%. There was found a linear relationship between plasma C-peptide levels and erythrocyte Na+K+ATPase activity. In small capillaries, microvascular blood flow is increasingly determined by the rheologic properties of erythrocytes. Using laser-diffractoscopie a huge improvement in erythrocyte deformability could be observed after C-peptide administration in erythrocytes of type 1 diabetic patients. Inhibition of the Na+K+ATPase by Obain completely abolished the effect of C-peptide on erythrocyte deformability. In conclusion, C-peptide improves microvascular function and blood flow in type 1 diabetic patients by interfering with vascular and rheological components of microvascular blood flow.

Authors+Show Affiliations

Institute for Clinical Research and Development, Mainz, Germany. thomasf@ikfe.deNo affiliation info available

Pub Type(s)

Journal Article
Review

Language

eng

PubMed ID

15198371

Citation

Forst, T, and T Kunt. "Effects of C-peptide On Microvascular Blood Flow and Blood Hemorheology." Experimental Diabesity Research, vol. 5, no. 1, 2004, pp. 51-64.
Forst T, Kunt T. Effects of C-peptide on microvascular blood flow and blood hemorheology. Exp Diabesity Res. 2004;5(1):51-64.
Forst, T., & Kunt, T. (2004). Effects of C-peptide on microvascular blood flow and blood hemorheology. Experimental Diabesity Research, 5(1), pp. 51-64.
Forst T, Kunt T. Effects of C-peptide On Microvascular Blood Flow and Blood Hemorheology. Exp Diabesity Res. 2004;5(1):51-64. PubMed PMID: 15198371.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of C-peptide on microvascular blood flow and blood hemorheology. AU - Forst,T, AU - Kunt,T, PY - 2004/6/17/pubmed PY - 2004/10/13/medline PY - 2004/6/17/entrez SP - 51 EP - 64 JF - Experimental diabesity research JO - Exp. Diabesity Res. VL - 5 IS - 1 N2 - Beside functional and structural changes in vascular biology, alterations in the rheologic properties of blood cells mainly determines to an impaired microvascular blood flow in patients suffering from diabetes mellitus. Recent investigations provide increasing evidence that impaired C-peptide secretion in type 1 diabetic patients might contribute to the development of microvascular complications. C-peptide has been shown to stimulate endothelial NO secretion by activation of the Ca2+ calmodolin regulated enzyme eNOS. NO himself has the potency to increase cGMP levels in smooth muscle cells and to activate Na+K+ATPase activity and therefore evolves numerous effects in microvascular regulation. In type 1 diabetic patients, supplementation of C-peptide was shown to improve endothelium dependent vasodilatation in an NO-dependent pathway in different vascular compartments. In addition, it could be shown that C-peptide administration in type 1 diabetic patients, results in a redistribution of skin blood flow by increasing nutritive capillary blood flow in favour to subpapillary blood flow. Impaired Na+K+ATPase in another feature of diabetes mellitus in many cell types and is believed to be a pivotal regulator of various cell functions. C-peptide supplementation has been shown to restore Na+K+ATPase activity in different cell types during in vitro and in vivo investigations. In type 1 diabetic patients, C-peptide supplementation was shown to increase erythrocyte Na+K+ATPase activity by about 100%. There was found a linear relationship between plasma C-peptide levels and erythrocyte Na+K+ATPase activity. In small capillaries, microvascular blood flow is increasingly determined by the rheologic properties of erythrocytes. Using laser-diffractoscopie a huge improvement in erythrocyte deformability could be observed after C-peptide administration in erythrocytes of type 1 diabetic patients. Inhibition of the Na+K+ATPase by Obain completely abolished the effect of C-peptide on erythrocyte deformability. In conclusion, C-peptide improves microvascular function and blood flow in type 1 diabetic patients by interfering with vascular and rheological components of microvascular blood flow. SN - 1543-8600 UR - https://www.unboundmedicine.com/medline/citation/15198371/Effects_of_C_peptide_on_microvascular_blood_flow_and_blood_hemorheology_ L2 - https://dx.doi.org/10.1080/15438600490424532 DB - PRIME DP - Unbound Medicine ER -