Study summary · research use only
Epitalon protects against post-ovulatory aging-related damage of mouse oocytes in vitro
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
In this in vitro study of mouse oocytes, researchers tested whether Epitalon, a synthetic four-amino-acid peptide (alanine, glutamic acid, aspartic acid, and glycine) based on a natural pineal peptide, affects post-ovulatory aging. Epitalon at 0.1mM was added to culture medium, and oocyte quality was assessed at 6h, 12h, and 24h. The authors report that 0.1mM Epitalon reduced intracellular reactive oxygen species, decreased the frequency of spindle defects and abnormal cortical granule distribution at 12h and 24h, and increased mitochondrial membrane potential and mitochondrial DNA copy number, with reduced apoptosis by 24h. The authors state the results suggest Epitalon may delay in vitro oocyte aging through effects on mitochondrial activity and reactive oxygen species levels.
Abstract
The developmental potential of oocytes decreases with time after ovulation in vivo or in vitro. Epitalon is a synthetic short peptide made of four amino acids (alanine, glutamic acid, aspartic acid, and glycine), based on a natural peptide called epithalamion extracted from the pineal gland. It is a potent antioxidant, comparable to melatonin, that may confer longevity benefits. The current study aims to test the protective effects of Epitalon on the quality of post-ovulatory aging oocytes. Epitalon at 0.1mM was added to the culture medium, and the quality of oocytes was evaluated at 6h, 12h, and 24h of culture. We found that 0.1mM Epitalon reduced intracellular reactive oxygen species. Epitalon treatment significantly decreased frequency of spindle defects and abnormal distribution of cortical granules during aging for 12h and 24h, while increased mitochondrial membrane potential and DNA copy number of mitochondria, thus decreasing apoptosis of oocytes by 24h of in vitro aging. Our results suggest that Epitalon can delay the aging process of oocytes in vitro via modulating mitochondrial activity and ROS levels.
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