Marginal growth increase, altered bone quality and polycystic ovaries in female prepubertal rats after treatment with the aromatase inhibitor exemestane.

Abstract:

BACKGROUND:Aromatase inhibition has been proposed as a potential approach for growth enhancement in children with short stature, but detailed animal studies are lacking. AIM:To assess the effect and potential adverse effects of aromatase inhibition on growth in female rats. METHODS:Prepubertal Wistar rats received intramuscular injections with placebo or the aromatase inhibitor exemestane at a dose of 10, 30 or 100 mg/kg/week (E10, E30, E100) for 3 weeks. A control group was ovariectomized (OVX). Weight and length gain, tibia and femur length, growth plate width, organ weights, insulin-like growth factor I (IGF-I) levels, and histology of the ovaries, uterus and brain were analyzed. X-ray microtomography of femora was performed. RESULTS:E100 significantly increased weight gain and growth plate width, but less prominently than OVX. Trabecular number and thickness were decreased in E100 and OVX in the metaphysis and epiphysis. E100 significantly decreased ovarian weight and multiple cysts were seen upon histological evaluation. No significant effects were found on IGF-I levels and brain morphology in E100. E10 and E30 had no effects on growth. CONCLUSION:A high dose of exemestane marginally increases axial and appendicular growth in female rats, at the expense of osteopenia and polycystic ovaries.

journal_name

Horm Res Paediatr

authors

van Gool SA,Wit JM,De Schutter T,De Clerck N,Postnov AA,Kremer Hovinga S,van Doorn J,Veiga SJ,Garcia-Segura LM,Karperien M

doi

10.1159/000271916

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

49-60

issue

1

eissn

1663-2818

issn

1663-2826

pii

000271916

journal_volume

73

pub_type

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