Elevated circulating adiponectin in type 1 diabetes is associated with long diabetes duration.

Abstract:

OBJECTIVE:To study circulating adiponectin concentrations in relation to diabetes duration and endogenous insulin secretion in patients with type 1 diabetes. PATIENTS:Patients with haemoglobin A1c (HbA1c) < 6% (reference range 3.6-5.4%) were selected for the study. Twenty-two men and 24 women [age 41.3 +/- 13.8 years (mean +/- SD), diabetes duration 4 months to 52 years] participated. Healthy controls (15 women and nine men, age 41.3 +/- 13.0 years) were also included. Overnight fasting serum samples were analysed for adiponectin, HbA1c, C-peptide and lipoproteins. RESULTS:Significant positive associations were found between adiponectin concentrations and diabetes duration in univariate and multiple regression analyses. Serum adiponectin averaged 9.7 +/- 5.3 [median 8.1, interquartile range (IQR) 3.6] mg/l in patients with diabetes duration less than 10 years and 17.8 +/- 10.7 (median 14.7, IQR 7.5) mg/l in patients with longer duration (P = 0.0001). Among the patients, 24 were without detectable (< 100 pmol/l) and 22 with detectable C-peptide levels (185 +/- 91 pmol/l). C-peptide levels in controls averaged 492 +/- 177 pmol/l. HbA1c was 5.7 +/- 0.6% in patients without detectable C-peptide and 5.6 +/- 0.4% in patients with detectable C-peptide (ns). Serum adiponectin was higher in patients without detectable C-peptide than in patients with detectable C-peptide [17.3 +/- 11.1 vs. 10.6 +/- 5.8 mg/l (P < 0.005)] and in the controls [10.1 +/- 2.9 mg/l (P < 0.001 vs. patients without detectable C-peptide)]. CONCLUSIONS:The increase in circulating adiponectin concentrations in patients with type 1 diabetes appears to be strongly associated with long diabetes duration, irrespective of the metabolic control. Among other factors, a putative role for residual beta-cell function in the regulation of circulating adiponectin levels can be considered but we did not find sufficient evidence for this in the present study.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Lindström T,Frystyk J,Hedman CA,Flyvbjerg A,Arnqvist HJ

doi

10.1111/j.1365-2265.2006.02666.x

subject

Has Abstract

pub_date

2006-12-01 00:00:00

pages

776-82

issue

6

eissn

0300-0664

issn

1365-2265

pii

CEN2666

journal_volume

65

pub_type

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