Open AccessCutting the ovarian surface improves the responsiveness to exogenous hormonal treatment in aged mice
Author(s) -
Umehara Takashi,
Urabe Nao,
Obata Toshiki,
Yamaguchi Takashi,
Tanaka Atsushi,
Shimada Masayuki
Publication year - 2020
Publication title -
reproductive medicine and biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 22
eISSN - 1447-0578
pISSN - 1445-5781
DOI - 10.1002/rmb2.12345
Subject(s) - follicular phase , ovary , fibrosis , medicine , estrous cycle , hormone , premature ovarian failure , stroma , ovarian follicle , physiology , gynecology , andrology , immunohistochemistry
Purpose Ovarian vascular abnormality and ovarian fibrosis are observed in the low responder patients and aging mice. Vascularization and fibrosis are regulated by injury‐repair system, such as wound. Thus, in this study, the authors tried to investigate the effect of the surgical treatment to ovarian surface with cutting on the functions of ovary in aging mouse model, gc Nrg1 KO. Method The ovarian surface of gc Nrg1 KO was surgically cut, and then the ovary was returned inside of bursa ovarica. To assess the effect of cutting on fertility, mating test, smear analysis, and exogenous hormonal treatment were done. Additionally, the histological analysis was used for observing the remodeling of ovarian stroma after the surgical approach. Result Ovarian fibrosis disappeared at 7 days after surgery. With the abrogation of fibrosis, the blood vessels were fluently observed around the follicles, and the follicular development was re‐started. The responses against exogenous hormone were recovered at 21 days after the surgery, and estrous cycle and delivery were also recovered by the surgery and the fertility was maintained for 3 months. Conclusion This cutting method of ovarian surface becomes a good option against low responder patients.