Gender differences of oligomers and total adiponectin during puberty: a cross-sectional study of 859 Danish school children

Kristian Kjaer Andersen, Jan Frystyk, Ole D Wolthers, Carsten Heuck, Allan Flyvbjerg

86 Citationer (Scopus)

Abstract

CONTEXT: Pubertal stages have been shown to influence total adiponectin (ADPN) levels. Furthermore, testosterone has been shown to alter the isomer distribution of ADPN.

OBJECTIVE: The goal of this study was to investigate whether pubertal stages and testosterone levels influenced total serum ADPN levels and the distribution of ADPN isomers.

DESIGN: This is a cross-sectional study.

PATIENTS: The study included 859 children and adolescents (396 males) aged 6-20 yr.

MAIN OUTCOME MEASURES: Total ADPN and ADPN isomers were measured using a validated in-house immunofluorometric assay. Fractioning of the ADPN into the three major molecular fractions was performed in representative subgroups of pre- and postpubertal males and females (n = 40, 10 in each group) using a validated fast protein liquid chromatography method.

RESULTS: Total ADPN levels before puberty were 13.4 (11.1-15.9) mg/liter (median and interquartile range) and 14.7 (12.3-18.1) mg/liter (P = not significant), in males and females, respectively. After puberty, ADPN levels were significantly reduced in males, 9.7 (8.2-12.0) mg/liter but remained unchanged in females, 12.1 (9.7-15.3) mg/liter (P < 0.0001). Concomitantly, a reduction was seen in the ratio of high-molecular-weight (HMW) isomers to total ADPN (HMW ratio) when comparing prepubertal and postpubertal males. Also, postpubertal males had lower HMW ratios than corresponding females (P = 0.038). Finally, a negative correlation was seen between HMW ratio and testosterone (r = -0.430, P = 0.007).

CONCLUSION: Serum total ADPN levels decrease through puberty in males. Also, a reduced HMW ratio is seen in males at the onset of puberty. We speculate that the suppression of HMW ADPN may be caused by testosterone.

OriginalsprogEngelsk
TidsskriftThe Journal of clinical endocrinology and metabolism
Vol/bind92
Udgave nummer5
Sider (fra-til)1857-62
Antal sider6
ISSN0021-972X
DOI
StatusUdgivet - maj 2007
Udgivet eksterntJa

Fingeraftryk

Dyk ned i forskningsemnerne om 'Gender differences of oligomers and total adiponectin during puberty: a cross-sectional study of 859 Danish school children'. Sammen danner de et unikt fingeraftryk.

Citationsformater