Transcriptome Identification of Differential Mammary Genes of Kazakh Horses During Early Pregnancy.

This research study investigates the difference in mammary gland genes of Kazakh mares during early stages of pregnancy, through the use of transcriptome sequencing technology. The results offer significant foundational data necessary for understanding genes related to lactation regulation and breast development in these horses.

Objective of the Study

• The intent of the research was to explore the differences in mammary gland genes of Kazakh mares in early pregnancy. It aimed to provide insightful data that would be crucial in comprehending the molecular and biological regulation of lactation and breast development. The study was made possible by the use of transcriptome sequencing technology.

Methodology

• The study sample consisted of three pregnant and three non-pregnant Kazakh mares. Comparative analysis was conducted on the transcriptome data obtained from their mammary tissues.
• Transcriptome sequencing was done on the extracted mammary glands from the selected mares.

Findings of the Study

• The research identified 9 long non-coding RNAs (lncRNAs) and 122 mRNAs that were differentially expressed between the pregnant and non-pregnant groups.
• Gene Ontology (GO) enrichment analysis was carried out which displayed 175 molecular functions, 59 cellular components, and 555 biological processes including cellular hormone metabolic process, hormone catabolic process, and I-kappaB kinase/NF-kappaB signaling.
• Analysis also showed the differentially expressed genes were mainly enriched in the NF-kappa B signaling pathway, steroid hormone biosynthesis, breast cancer, ECM-receptor interaction, and MAPK signaling pathway.
• WNT4, DPP4, and NFKBIA were identified as key nodes involved in breast activation.

Conclusions of the Study

• The study supports the understanding of gene expression in Kazakh mares during the early stages of pregnancy.
• The research has offered useful insights and foundational data for identifying candidate genes that contribute to the regulation of lactation and breast development in these horses.