当前位置： SCI文献检索 > Metabolic Syndrome and Related Disorders期刊下所有文献 > β-Cell dysfunction is associated with metabolic syndrome severity in adults.

β-Cell dysfunction is associated with metabolic syndrome severity in adults.

Abstract：

BACKGROUND:Metabolic syndrome is prevalent in adults characterized by increased visceral adiposity and insulin resistance (IR). However, the link between pancreatic β-cell function and metabolic syndrome severity in adults across the glucose spectrum is unknown. We hypothesized that poor β-cell function would independently predict a higher metabolic syndrome Z-score (i.e., severity). METHODS:Seventy (12 normal glucose tolerant, 37 prediabetic, 21 type 2 diabetic) obese adults [62.4±1.1 year; 34.6±0.6 kg/m(2); data are mean±standard error of the mean (SEM)] participated in this cross-sectional study. A 2-hr 75-gram oral glucose tolerance test (OGTT) was administered, and insulin and glucose area under the curve was determined for calculations of insulin action. Fasting and glucose-stimulated insulin secretion was calculated using homeostasis model assessment of insulin secretion (HOMA-B) and the insulinogenic index (i.e., I(0-30)/Glc(0-30) or I(60-120)/Glc(60-120)), respectively. Fasting and postprandial insulin sensitivity was assessed by HOMA-IR and the Matsuda Index, respectively. β-cell function was estimated using the disposition index via HOMA-B/HOMA-IR, I(0-30)/Glc(0-30) or I(60-120)/Glc(60-120) × Matsuda Index, which represents basal, first-, and second-phase insulin release, respectively. Body composition (via computerized tomography and dual X-ray absorptiometry) and sex-specific metabolic syndrome Z-scores were calculated from waist circumference, blood pressure, fasting glucose, triglycerides, and high-density lipoproteins. RESULTS:Compared to those with normal glucose tolerance, visceral fat and IR were higher and β-cell function was lower in adults with glucose intolerance and type 2 diabetes mellitus. Elevated visceral fat and IR (HOMA-IR and Matsuda Index) correlated with elevated Z-scores (r=0.51, r=0.54, r=-0.49; all P<0.002, respectively). Basal, first-, and second-phase β-cell function correlated with low Z-scores (r=-0.59, r=-0.51, and r=-0.43, all P<0.001). Insulin secretion significantly predicted the Z-score independent of sex, body fat, blood lipids, blood pressure, IR, and glucose metabolism (P<0.005). CONCLUSION:β-cell dysfunction is highly correlated with the severity of metabolic syndrome in adults. Future work is warranted to elucidate the mechanism by which cardiometabolic disturbances influence insulin secretion.

journal_name

Metab Syndr Relat Disord

journal_title

Metabolic syndrome and related disorders

authors

Malin SK,Finnegan S,Fealy CE,Filion J,Rocco MB,Kirwan JP

doi

10.1089/met.2013.0083

subject

Has Abstract

pub_date

2014-03-01 00:00:00

pages

79-85

issue

eissn

1540-4196

issn

1557-8518

journal_volume

pub_type

杂志文章

在线工具

β-Cell dysfunction is associated with metabolic syndrome severity in adults.