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Oral oyster polypeptides protect ovary against d ‐galactose‐induced premature ovarian failure in C57BL/6 mice
Author(s) -
Li Yunkun,
Qiu Wei,
Zhang Zhi,
Han Xingfa,
Bu Guixian,
Meng Fengyan,
Kong Fanli,
Cao Xiaohan,
Huang Anqi,
Feng Zhijiang,
Li Yun,
Zeng Xianyin,
Du Xiaogang
Publication year - 2019
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.9997
Subject(s) - oyster , premature ovarian failure , oxidative stress , medicine , endocrinology , luteinizing hormone , follicle , apoptosis , malondialdehyde , biology , follicle stimulating hormone , superoxide dismutase , andrology , ovarian follicle , folliculogenesis , ovary , hormone , biochemistry , gene , fishery , embryogenesis
BACKGROUND Oyster polypeptides have various biofunctions, such as anti‐cancer and anti‐oxidative stress, but whether it has the protective effects to primary ovarian failure (POF) remains poorly understand. To address this issue, daily gavage of oyster polypeptides was performed to investigate their protective effect, basing on d ‐galactose‐induced POF model in C57BL/6 female mice. RESULTS Oyster polypeptides restored the irregular estrous cycles and the abnormal serum follicle stimulating hormone (FSH), luteinizing hormone (LH) and progesterone (P) levels as well as the decreased mRNA expression level of Amh that were induced by d ‐galactose. The follicle development of POF mice was improved by increasing the primordial follicle ratio and decreasing the atretic follicle number after oral administration of oyster polypeptides. Moreover, in the oyster polypeptides treated mice, the total superoxide dismutase (T‐SOD) activity was significantly increased, while the malondialdehyde levels were significantly decreased. The mRNA expression levels of stress‐related genes ( SOD2 , SIRT1 and FOXO3a ) were remarkably up‐regulated after d ‐galactose induction, but the up‐regulation was weakened or disappeared by the gavage of oyster polypeptides. In addition, oyster polypeptides treatment also reduced the apoptosis of the ovarian granulosa cells and down‐regulated the mRNA expression levels of apoptosis‐related genes ( p53 and Bad but not Bcl‐2 ). CONCLUSION This study reveals that oyster polypeptides may protect ovary against d ‐galactose‐induced POF by their anti‐oxidative stress activity to rescue d ‐galactose‐induced ovarian oxidative damage and therefore to prevent ovarian cells apoptosis, thereby tipping the abnormality trigged by POF to get close to the normal levels. © 2019 Society of Chemical Industry