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Transcriptomic Profiling of Peripheral Blood Identifies Candidate Genes for Early Pregnancy Diagnosis in Sika Deer

文献类型： 外文期刊

作者： Zhang, Yushi;Sun, Huimin;Fan, Bingfeng;Liu, Lixiang;Tang, Yu;Zhang, Ying;Zhang, Xulin;Chu, Xiaoyu;Peng, Feiyu;Cao, Jie;Xu, Baozeng

作者机构：

关键词： sika deer;pregnancy diagnosis;peripheral blood;RNA-Seq;time-series transcriptome;WGCNA

期刊名称： ANIMALS

ISSN： 2076-2615

年卷期： 2025 年 15 卷 20 期

页码：

收录情况： SCIE（2025版）

摘要： With estrus confined to three winter months, early pregnancy detection is essential for reproductive management in farmed sika deer. However, the development of reliable non-invasive early pregnancy detection techniques has been hindered by limited understanding of their reproductive physiology. To identify pregnancy-specific biomarkers in sika deer, we performed RNA-sequencing (RNA-Seq) on maternal peripheral blood collected on days 0, 7, 15, and 20 after artificial insemination. Using time-series clustering analysis and weighted gene co-expression network analysis (WGCNA), we identified key genes and pathways at each stage. Notably, maternal-fetal recognition-related interferon-stimulated genes (ISGs; IFNAR1/2, STAT1/2, MX1/2, and RSAD2), anti-apoptotic and immune-regulatory genes (BCL2, XIAP, and IL10), and cysteine metabolism genes (CTH, CBS, GCLC, and GCLM) were upregulated by day 7, suggesting their role in supporting corpus luteum development through immune regulation and redox homeostasis. By days 15-20, upregulated genes were enriched in pathways related to mitochondrial function, cell adhesion, and cell cycle regulation, indicating their involvement in embryo adhesion and syndesmochorial placentation. In conclusion, this study demonstrates that ISGs, immune-regulatory genes and cysteine metabolism genes are detectable as early as day 7 post-insemination, highlighting their promise as early pregnancy biomarkers and providing a molecular basis for non-invasive diagnostic development in sika deer.

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