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Twin models of environmental and genetic influences on pubertal development, salivary testosterone, and estradiol in adolescence.

Abstract：

OBJECTIVE:Research on sources of variation in adolescent's gonadal hormone levels is limited. We sought to decompose individual differences in adolescent testosterone, estradiol, and pubertal status, into genetic and environmental components. DESIGN:A sample of male and female adolescent twins from the greater Austin and Houston areas provided salivary samples, with a subset of participants providing longitudinal data at 2 waves. PARTICIPANTS:The sample included 902 adolescent twins, 49% female, aged 13-20 years (M = 15.91) from the Texas Twin Project. Thirty-seven per cent of twin pairs were monozygotic; 30% were same-sex dizygotic (DZ) pairs; and 33% were opposite-sex DZ pairs. MEASUREMENTS:Saliva samples were assayed for testosterone and estradiol using chemiluminescence immunoassays. Pubertal status was assessed using self-report. Biometric decompositions were performed using multivariate quantitative genetic models. RESULTS:Genetic factors contributed substantially to variation in testosterone in males and females in the follicular phase of their menstrual cycle (h2 = 60% and 51%, respectively). Estradiol was also genetically influenced in both sexes, but was predominately influenced by nonshared environmental factors. The correlation between testosterone and estradiol was mediated by a combination of genetic and environmental influences for males and females. Genetic and environmental influences on hormonal concentrations were only weakly correlated with self-reported pubertal status, particularly for females. CONCLUSIONS:Between-person variability in adolescent gonadal hormones and their interrelationship reflects both genetic and environmental processes, with both testosterone and estradiol containing sizeable heritable components.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Grotzinger AD,Mann FD,Patterson MW,Herzhoff K,Tackett JL,Tucker-Drob EM,Paige Harden K

doi

10.1111/cen.13522

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

243-250

issue

eissn

0300-0664

issn

1365-2265

journal_volume

pub_type

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Twin models of environmental and genetic influences on pubertal development, salivary testosterone, and estradiol in adolescence.