Early apoptosis detection in canine granulosa cells through the analysis of BCL-2 and BAX proteins during the follicular development associated with oocyte maturation

IF 2.2 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animal Reproduction Science Pub Date : 2024-11-02 DOI:10.1016/j.anireprosci.2024.107635

Michelle Salinger , Jaime Palomino , Oscar A Peralta , Victor H. Parraguez , Monica De los Reyes

{"title":"Early apoptosis detection in canine granulosa cells through the analysis of BCL-2 and BAX proteins during the follicular development associated with oocyte maturation","authors":"Michelle Salinger , Jaime Palomino , Oscar A Peralta , Victor H. Parraguez , Monica De los Reyes","doi":"10.1016/j.anireprosci.2024.107635","DOIUrl":null,"url":null,"abstract":"<div><div>The objective of this study was to investigate the early follicular apoptosis in canine ovarian follicles by examining the expression of anti-apoptotic BCL-2 and pro-apoptotic BAX proteins throughout the estrous cycle associated with oocyte maturation. Follicular cells from preantral and antral follicles of varying sizes were isolated and grouped based on follicle type and estrous phase. Antral follicles underwent flow cytometry analysis, whereas preantral follicles were subjected to Western blotting. The meiotic capacity of oocytes from these different follicle types was evaluated through in vitro maturation. Statistical analysis included ANOVA and Duncan’s test. Results showed fluctuations in BCL-2 and BAX levels across different follicular stages and estrous phases. BCL-2 levels increased (<em>P</em><0.05) with follicular development in antral follicles, particularly during estrus, while BAX exhibited variations peaking (<em>P</em><0.05) during estrus. The BCL-2/BAX ratio in antral follicles was higher (<em>P</em><0.05) in estrus and diestrus compared to anestrus and proestrus. Additionally, BCL-2 and BAX proteins were detected in preantral follicles, with varying expression levels (<em>P</em><0.05) across estrous phases. The BCL-2/BAX ratio in preantral follicles was highest (<em>P</em><0.05) during anestrus and estrus and decreased (<em>P</em><0.05) in proestrus and diestrus. Oocytes from preantral follicles did not reach the MII stage, regardless of the levels of BCL-2/BAX. Conversely, oocytes obtained from large follicles during estrus showed the highest (<em>P</em><0.05) maturation percentages, which were associated with the highest BCL-2/BAX ratio. These findings provide insights into the dynamic patterns of BCL-2 /BAX in canine follicles across the estrous cycle, shedding light on their potential roles in oocyte development.</div></div>","PeriodicalId":7880,"journal":{"name":"Animal Reproduction Science","volume":"271 ","pages":"Article 107635"},"PeriodicalIF":2.2000,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Animal Reproduction Science","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378432024002355","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRICULTURE, DAIRY & ANIMAL SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

The objective of this study was to investigate the early follicular apoptosis in canine ovarian follicles by examining the expression of anti-apoptotic BCL-2 and pro-apoptotic BAX proteins throughout the estrous cycle associated with oocyte maturation. Follicular cells from preantral and antral follicles of varying sizes were isolated and grouped based on follicle type and estrous phase. Antral follicles underwent flow cytometry analysis, whereas preantral follicles were subjected to Western blotting. The meiotic capacity of oocytes from these different follicle types was evaluated through in vitro maturation. Statistical analysis included ANOVA and Duncan’s test. Results showed fluctuations in BCL-2 and BAX levels across different follicular stages and estrous phases. BCL-2 levels increased (P<0.05) with follicular development in antral follicles, particularly during estrus, while BAX exhibited variations peaking (P<0.05) during estrus. The BCL-2/BAX ratio in antral follicles was higher (P<0.05) in estrus and diestrus compared to anestrus and proestrus. Additionally, BCL-2 and BAX proteins were detected in preantral follicles, with varying expression levels (P<0.05) across estrous phases. The BCL-2/BAX ratio in preantral follicles was highest (P<0.05) during anestrus and estrus and decreased (P<0.05) in proestrus and diestrus. Oocytes from preantral follicles did not reach the MII stage, regardless of the levels of BCL-2/BAX. Conversely, oocytes obtained from large follicles during estrus showed the highest (P<0.05) maturation percentages, which were associated with the highest BCL-2/BAX ratio. These findings provide insights into the dynamic patterns of BCL-2 /BAX in canine follicles across the estrous cycle, shedding light on their potential roles in oocyte development.

查看原文本刊更多论文

通过分析与卵母细胞成熟相关的卵泡发育过程中的 BCL-2 和 BAX 蛋白，检测犬颗粒细胞的早期凋亡。

本研究的目的是通过检测与卵母细胞成熟相关的整个发情周期中抗凋亡 BCL-2 蛋白和促凋亡 BAX 蛋白的表达，研究犬卵巢卵泡的早期卵泡凋亡。根据卵泡类型和发情期，从不同大小的前位卵泡和前位卵泡中分离出卵泡细胞并进行分组。对前位卵泡进行流式细胞术分析，而对前前位卵泡进行 Western 印迹分析。通过体外成熟，对来自这些不同卵泡类型的卵母细胞的减数分裂能力进行了评估。统计分析包括方差分析和邓肯检验。结果显示，BCL-2和BAX的水平在不同卵泡期和发情期有波动。BCL-2水平增加（P

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Animal Reproduction Science 农林科学-奶制品与动物科学

CiteScore

4.50

自引率

9.10%

发文量

136

审稿时长

54 days

期刊介绍： Animal Reproduction Science publishes results from studies relating to reproduction and fertility in animals. This includes both fundamental research and applied studies, including management practices that increase our understanding of the biology and manipulation of reproduction. Manuscripts should go into depth in the mechanisms involved in the research reported, rather than a give a mere description of findings. The focus is on animals that are useful to humans including food- and fibre-producing; companion/recreational; captive; and endangered species including zoo animals, but excluding laboratory animals unless the results of the study provide new information that impacts the basic understanding of the biology or manipulation of reproduction. The journal''s scope includes the study of reproductive physiology and endocrinology, reproductive cycles, natural and artificial control of reproduction, preservation and use of gametes and embryos, pregnancy and parturition, infertility and sterility, diagnostic and therapeutic techniques. The Editorial Board of Animal Reproduction Science has decided not to publish papers in which there is an exclusive examination of the in vitro development of oocytes and embryos; however, there will be consideration of papers that include in vitro studies where the source of the oocytes and/or development of the embryos beyond the blastocyst stage is part of the experimental design.