PMID- 31887337 OWN - NLM STAT- MEDLINE DCOM- 20210104 LR - 20210104 IS - 1872-8057 (Electronic) IS - 0303-7207 (Linking) VI - 504 DP - 2020 Mar 15 TI - Rapamycin treatment maintains developmental potential of oocytes in mice and follicle reserve in human cortical fragments grafted into immune-deficient mice. PG - 110694 LID - S0303-7207(19)30396-X [pii] LID - 10.1016/j.mce.2019.110694 [doi] AB - The ovarian follicle pool size is limited; it decreases with age and following germ cell-damaging chemo- or radiation therapies. Due to a trend of delaying child-bearing age in the modern society, it is important to investigate the possibility to maintain the follicle reserve for middle-aged women and cancer-bearing patients subject to therapies. Earlier studies demonstrated the important role of the mammalian targets of the rapamycin (MTOR) signaling pathway in the activation of primordial follicles and suggested that treatment with the MTOR inhibitor rapamycin could maintain the follicle pool in rodents. Here, we confirmed the ability of rapamycin treatment for 3 weeks to suppress primordial follicle development and to maintain follicle pool size in mice. We further demonstrated that the developmental potential of oocytes was not affected by rapamycin treatment and the effect of rapamycin to decrease initial follicle recruitment is reversible. Using human ovarian cortical fragments grafted into immune-deficient mice, we demonstrated the ability of rapamycin to suppress follicle growth from the primordial stage. Our studies provide the basis for further studies on the possibility of using MTOR inhibitors to maintain follicle reserve in middle-aged women and cancer patients before/during germ cell-damaging therapies. CI - Copyright (c) 2019 Elsevier B.V. All rights reserved. FAU - Yorino Sato AU - Yorino Sato AD - Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kawasaki, Kanagawa, 216-8511, Japan. FAU - Kawamura, Kazuhiro AU - Kawamura K AD - Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kawasaki, Kanagawa, 216-8511, Japan. Electronic address: kazuhironanami@gmail.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20191227 PL - Ireland TA - Mol Cell Endocrinol JT - Molecular and cellular endocrinology JID - 7500844 RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Aging/physiology MH - Animals MH - Female MH - Germ Cells/drug effects/metabolism/transplantation MH - Heterografts MH - Humans MH - Male MH - Mice MH - Mice, Inbred ICR MH - Mice, SCID MH - Middle Aged MH - Oocytes/*drug effects/physiology MH - Oogenesis/*drug effects/physiology MH - Ovarian Follicle/*drug effects/physiology MH - Ovarian Reserve/*drug effects MH - Ovary/drug effects/metabolism/*transplantation MH - Pregnancy MH - Sirolimus/*pharmacology OTO - NOTNLM OT - MTOR OT - Oocyte developmental potential OT - Ovarian reserve OT - Primordial follicle OT - Rapamycin EDAT- 2019/12/31 06:00 MHDA- 2021/01/05 06:00 CRDT- 2019/12/31 06:00 PHST- 2019/08/13 00:00 [received] PHST- 2019/12/23 00:00 [revised] PHST- 2019/12/24 00:00 [accepted] PHST- 2019/12/31 06:00 [pubmed] PHST- 2021/01/05 06:00 [medline] PHST- 2019/12/31 06:00 [entrez] AID - S0303-7207(19)30396-X [pii] AID - 10.1016/j.mce.2019.110694 [doi] PST - ppublish SO - Mol Cell Endocrinol. 2020 Mar 15;504:110694. doi: 10.1016/j.mce.2019.110694. Epub 2019 Dec 27.