Compensatory responses to insulin resistance in obese African-American and Latina girls.

Abstract:

PURPOSE:Insulin responses to oral and intravenous glucose markedly differ by ethnicity. This study examined whether ethnic differences in pancreatic insulin secretion, hepatic insulin extraction and clearance explain these disparate findings in 35 obese African-American and 41 Latina girls (Tanner Stages: IV-V; ages: 14-18; body mass index percentile: 85.9-99.8%). METHODS:Pancreatic insulin secretion, hepatic insulin extraction and clearance were estimated by C-peptide and insulin modeling during an oral glucose tolerance test. Insulin sensitivity (SI), acute insulin response to glucose (AIRG ) and disposition index were derived from a frequently sampled intravenous glucose tolerance test. RESULTS:Compared to Latinas, obese African-American adolescents had lower pancreatic insulin secretion (21.3%; P < 0.01), glucose incremental area under the curve (IAUC) (41.7%, P = 0.02), C-peptide IAUC (25.1%, P < 0.01) and SI (33.7%; P < 0.01). There were no ethnic differences in hepatic insulin extraction and clearance (P's > 0.05). CONCLUSIONS:Compensatory mechanisms to insulin resistance do not appear to explain the ethnic differences in insulin responses to oral and intravenous glucose in obese African-American and Latina girls.

journal_name

Pediatr Obes

journal_title

Pediatric obesity

authors

Hasson RE,Adam TC,Davis JN,Watanabe RM,Goran MI

doi

10.1111/j.2047-6310.2013.00184.x

subject

Has Abstract

pub_date

2013-12-01 00:00:00

pages

e68-73

issue

6

eissn

2047-6302

issn

2047-6310

journal_volume

8

pub_type

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