Chinese Journal of Tissue Engineering Research ›› 2025, Vol. 29 ›› Issue (19): 4069-4075.doi: 10.12307/2025.070

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Analysis of oocyte granulosa cell transcriptome data in aged women

Qin Lifeng1, Wang Jiaqiang1, Zhu Ling2   

  1. 1College of Life Science, Northeast Agricultural University, Harbin 150030, Heilongjiang Province, China; 2Key Laboratory of Human Embryo Engineering, Chongqing Maternal and Child Health Care Hospital, Chongqing 400013, China
  • Received:2023-10-11 Accepted:2024-04-28 Online:2025-07-08 Published:2024-09-13
  • Contact: Zhu Ling, Master, Key Laboratory of Human Embryo Engineering, Chongqing Maternal and Child Health Care Hospital, Chongqing 400013, China; Co-corresponding author: Wang Jiaqiang, MD, Professor, College of Life Science, Northeast Agricultural University, Harbin 150030, Heilongjiang Province, China
  • About author:Qin Lifeng, Master candidate, College of Life Science, Northeast Agricultural University, Harbin 150030, Heilongjiang Province, China
  • Supported by:
    Natural Science Foundation of Chongqing (General Project), No. cstc2021jcyj-msxmX0785 (to ZL)

Abstract: BACKGROUND: The granulosa cell state greatly affects the quality of oocytes. As the increased proportion of aged women in assisted reproduction, granulosa cells from patients of different ages are examined at transcript levels in order to better assess oocyte quality.
OBJECTIVE: To investigate the expression changes of mRNA and long non-coding RNA in granulosa cells from the young and aged patients.
METHODS: Waste cumulus granulosa cells obtained during the assisted reproductive cycle. Young group was in 25-35 years old, and the aged group was in 38-45 years old. Granulosa cells collected from the young and aged females were analyzed using RNA sequencing, three replications for each group.
RESULTS AND CONCLUSION: (1) The RNA sequencing analysis results showed that the average sequencing volume of samples was more than 14 G; the data quality Q30 after quality control was more than 93%; the average mapping rate of data was 98.4%, which indicates that the data had good quality. (2) The results of principal component analysis and correlation analysis showed that the samples of the aged group and the young group could be clearly distinguished. (3) The difference analysis results showed that compared with the young group, a total of 410 differentially expressed mRNAs were detected in the aged group (167 up-regulated and 243 down-regulated). GO analysis results showed that the down-regulated genes were mainly enriched in regulatedexocytosis and the emetabolicprocess. GSEA analysis results showed that secretion-related pathways in the aged group were down-regulated. (4) Compared with the young group, 662 differentially expressed long non-coding RNAs were detected in the aged group, and 1 772 protein-coding genes were directly regulated by these long non-coding RNAs, among which 59 genes overlaped with differentially expressed genes. The results showed that the expression of secretion-related genes and pathways in granulosa cells of the aged group was down-regulated, thus affecting oocyte quality. At the same time, these down-regulated genes were regulated by long non-coding RNA. Therefore, the expression of long non-coding RNA might be related to age.  

Key words: 年龄, 颗粒细胞, 卵母细胞, 全转录组, 差异基因, 长链非编码基因

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