Heritability of plasma leptin levels: a twin study.

Abstract:

OBJECTIVE:To examine the influence of genetic factors on plasma leptin levels. SUBJECTS AND METHODS:We measured plasma leptin levels, body mass index and body fat distribution in healthy young female monozygotic (n = 19) and dizygotic (n = 14) twins. The twin zygosity was verified by determination of short tandem repeat and amplified fragment length polymorphism systems. The genetic analysis included analysis of variance-based and maximum likelihood-based methods. RESULTS:Plasma leptin levels were correlated significantly with body mass index (r = 0.59, P < 0.001), waist circumference (r = 0.54, P < 0.001) and hip circumference (r = 0.63, P < 0.001), but not with age (r = -0.17) or the waist:hip ratio (r = 0.02). The heritability estimates derived from intraclass correlations were significant for body mass index (P = 0.001), waist circumference (P = 0.004), hip circumference (P = 0.01) and plasma leptin levels (P = 0.005), but not for the waist:hip ratio (P = 0.22). In the maximum likelihood-based path analysis, heritability was estimated at 79% for body mass index and at 73% for plasma leptin levels. After adjustment for body mass index, the heritability estimate for leptin levels from the model-fitting approach was 55%. CONCLUSIONS:Genetic factors are major determinants of plasma leptin levels in humans and may account for as much as half of the variance in leptin levels.

journal_name

J Hypertens

journal_title

Journal of hypertension

authors

Narkiewicz K,Szczech R,Winnicki M,Chrostowska M,Pawlowski R,Lysiak-Szydlowska W,Choe I,Kato M,Sivitz WI,Krupa-Wojciechowska B,Somers VK

doi

10.1097/00004872-199917010-00005

subject

Has Abstract

pub_date

1999-01-01 00:00:00

pages

27-31

issue

1

eissn

0263-6352

issn

1473-5598

journal_volume

17

pub_type

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