このエントリーをはてなブックマークに追加
ID 48594
file
creator
Kawashima, Ikko
Tanaka, Katsuhiro
Okuda, Satoshi
Kitasaka, Hiroya
Richards, JoAnne S.
subject
estrus cycle
female fertility
gonadotropins
ovarian aging
ovarian stroma
steroidogenesis
abstract
Irregular menstrual cycles, reduced responses to exogenous hormonal treatments, and altered endocrine profiles (high FSH/high LH/low AMH) are observed in women with increasing age before menopause. In this study, because the granulosa cell-specific Nrg1 knockout mice (gcNrg1KO) presented ovarian and endocrine phenotypes similar to older women, we sought to understand the mechanisms of ovarian aging and to develop anewstrategy for improving fertility in older women prior to menopause. In the ovary of 6-month-old gcNrg1KO mice, follicular development was blocked in bilayer secondary follicles and heterogeneous cells accumulated in ovarian stroma. The heterogeneous cells in ovarian stroma were distinguished as two different types: (i) the LH receptor-positive endocrine cells and (ii) actin-rich fibrotic cells expressing collagen. Both the endocrine and fibrotic cells disappeared following long-term treatment with a GnRH antagonist, indicating that the high levels of serum LH induced the survival of both cell types and the abnormal endocrine profile to reduce fertility. Moreover, follicular development to the antral stages was observed with reduced LH and the disappearance of the abnormal stromal cells. Mice treated with the GnRH antagonist regained normal, recurrent estrous cycles and continuously delivered pups for at least for 3 months. We conclude that endocrine and matrix alternations occur within the ovarian stroma with increasing age and that abolishing these alternations resets the cyclical release of LH. Thus, GnRH antagonist treatments might provide a new, noninvasive strategy for improving fertility in a subset of aging women before menopause.
description
This work was supported in part by The Japan Society for the Promotion of Science (JSPS) KAKENHI, JP24688028, JP 16H05017 (to MS) and JP15J05331 (to TU), by Japan Agency for Medical Research and Development (AMED) 16gk0110015 h0001 (to MS), and by National Institute of Health (NIH)-HD-076980 (to JSR).
journal title
Aging Cell
volume
Volume 16
issue
Issue 6
start page
1288
end page
1299
date of issued
2017-08-31
publisher
The Anatomical Society and John Wiley & Sons Ltd.
issn
1474-9718
1474-9726
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
© 2017 The Authors. Aging Cell published by the Anatomical Society and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
relation
Aging Cell (2017) 16, pp1288–1299
relation url
department
Graduate School of Biosphere Science