Copeptin and Estimated Insulin Sensitivity in Adults With and Without Type 1 Diabetes: The CACTI Study.

Abstract

OBJECTIVES:

Copeptin, a surrogate marker for vasopressin, is elevated in participants with insulin resistance (IR) and type 2 diabetes. Whereas adults with type 1 diabetes also demonstrate elevated copeptin concentrations and IR compared to controls without diabetes, the relationship between copeptin and IR in type 1 diabetes is unclear.

METHODS:

Participants with (n=209) and without (n=244) type 1 diabetes in the Coronary Artery Calcification in Type 1 Diabetes (CACTI) study were assessed for serum copeptin, vitals, estimated glomerular filtration rate, urinary albumin-to-creatinine ratio, glycated hemoglobin and lipid panels. Estimated insulin sensitivity (eIS) was calculated by validated equations in participants with and without type 1 diabetes. The relationships among copeptin, IR, waist circumference (WC) and body mass index (BMI) were examined with unadjusted and adjusted linear regression models.

RESULTS:

Copeptin was correlated with eIS (R=-0.17, R2=0.029), WC (R=0.16, R2=0.026) and BMI (R=0.22, R2=0.048) for type 1 diabetes and with eIS (R=-0.37, R2=0.14), WC (R=0.40, R2=0.16) and BMI (R=0.25, R2=0.063) in non-type 1 diabetes. In multivariable analysis, copeptin correlated with total cholesterol (beta±SE: -0.12±0.04, p=0.008) and low-density lipoprotein (beta±SE: -0.11±0.04, p=0.01) in type 1 diabetes. In non-type 1 diabetes, copeptin was associated with WC (beta±SE: 0.14±0.04, p=0.0024), BMI (beta±SE: 0.13±0.04, p=0.007) and eIS (beta±SE: -0.14±0.04, p=0.0013).

CONCLUSIONS:

Copeptin does not correlate with markers of IR in type 1 diabetes but strongly correlates in non-type 1 diabetes. Thus, elevated vasopressin activity and IR appear to be independent risk factors for vascular complications in type 1 diabetes.

• Authors: Thomas Jensen, Petter Bjornstad, Richard J Johnson, Rachel Sippl, Marian Rewers, Janet K Snell-Bergeon
• Journal: Canadian journal of diabetes (Can J Diabetes) Vol. 43 Issue 1 Pg. 34-39 (Feb 2019) ISSN: 2352-3840 [Electronic] Canada
• PMID: 30026043 (Publication Type: Clinical Trial, Comparative Study, Journal Article)
• Copyright: Copyright © 2018 Diabetes Canada. Published by Elsevier Inc. All rights reserved.

Chemical References

• Biomarkers
• Glycopeptides
• copeptins

Topics

• Adult
• Biomarkers (blood)
• Coronary Artery Disease (blood, diagnosis, epidemiology)
• Cross-Sectional Studies
• Diabetes Mellitus, Type 1 (blood, diagnosis, epidemiology)
• Female
• Glycopeptides (blood)
• Humans
• Insulin Resistance (physiology)
• Male
• Middle Aged