Involvement of Reactive Oxygen Species in Meiotic Cell Cycle Regulation and Apoptosis in Mammalian Oocytes

  • Meenakshi Tiwari Cell Physiology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
  • Shilpa Prasad Cell Physiology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
  • Anima Tripathi Cell Physiology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
  • Ashutosh N. Pandey Cell Physiology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
  • Arvind K. Singh Genetics Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
  • Tulsidas G. Shrivastav Department of Reproductive Biomedicine, National Institute of Health and Family Welfare, Baba Gang Nath Marg, Munirka, New Delhi 110067, India
  • Shail K. Chaube Cell Physiology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
Keywords: Apoptosis, Mammalian oocytes, Meiotic cell cycle arrest, Oxidative stress, Reactive oxygen species, Redox signaling

Abstract

The mammalian ovary is a metabolically active organ and generates a large amount of reactive oxygen species (ROS) during final stages of folliculogenesis. ROS modulate physiological arrest (i.e., diplotene arrest) in follicular oocytes as well as metaphase-II (M-II) arrest in ovulated oocytes in most of the mammalian species. A moderate increase in the level of ROS could be beneficial for meiotic resumption from diplotene and M-II arrest in oocytes. The increased production of ROS, decreased antioxidant system, drug treatment, pathological conditions, stress, and several other factors may lead to accumulation of ROS in the ovary. Increased levels of ROS may generate oxidative stress (OS), which could induce meiotic cell cycle arrest in oocytes. OS triggers granulosa cell apoptosis and thereby reduces the transfer of nutrients and survival factors to the oocytes, leading to apoptosis. In vitro culture conditions, reduced survival factors, and destabilized maturation promoting factor (MPF) may generate ROS and thereby OS in follicular and ovulated oocytes. OS induces apoptosis in diplotene- and M-II-arrested oocytes through mitochondria-mediated pathway. The deterioration in oocyte quality resulting from ROS-mediated apoptosis may negatively impact the outcome of assisted reproductive technology (ART) in several mammalian species, including humans.

Published
2016-03-01
How to Cite
Tiwari, M., Prasad, S., Tripathi, A., Pandey, A. N., Singh, A. K., Shrivastav, T. G., & Chaube, S. K. (2016). Involvement of Reactive Oxygen Species in Meiotic Cell Cycle Regulation and Apoptosis in Mammalian Oocytes. Reactive Oxygen Species, 1(2), 110‒116. Retrieved from https://www.aimsci.com/ros/index.php/ros/article/view/18
Section
Review Articles