Oral oyster polypeptides protect ovary against d-galactose-induced premature ovarian failure in C57BL/6 mice

J Sci Food Agric. 2020 Jan 15;100(1):92-101. doi: 10.1002/jsfa.9997. Epub 2019 Sep 30.

Abstract

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.

Keywords: apoptosis; follicle; oxidative stress; oyster polypeptides; primary ovarian failure.

MeSH terms

  • Animals
  • Apoptosis / drug effects
  • Female
  • Galactose / adverse effects
  • Humans
  • Luteinizing Hormone / metabolism
  • Malondialdehyde / metabolism
  • Mice
  • Mice, Inbred C57BL
  • Ostreidae / chemistry*
  • Ovarian Follicle / drug effects
  • Ovarian Follicle / metabolism
  • Ovary / drug effects
  • Ovary / metabolism
  • Oxidative Stress / drug effects
  • Peptides / administration & dosage*
  • Primary Ovarian Insufficiency / chemically induced
  • Primary Ovarian Insufficiency / drug therapy*
  • Primary Ovarian Insufficiency / genetics
  • Primary Ovarian Insufficiency / metabolism
  • Progesterone / metabolism
  • Protective Agents / administration & dosage*
  • Sirtuin 1 / genetics
  • Sirtuin 1 / metabolism
  • Superoxide Dismutase / genetics
  • Superoxide Dismutase / metabolism

Substances

  • Peptides
  • Protective Agents
  • Progesterone
  • Malondialdehyde
  • Luteinizing Hormone
  • Superoxide Dismutase
  • Sirt1 protein, mouse
  • Sirtuin 1
  • Galactose