Mammary transcriptome profile during peak and late lactation reveals differentially expression genes related to inflammation and immunity in chinese holstein

Ziyin Han, Yongliang Fan, Zhangping Yang, Juan J. Loor, Yi Yang

Research output: Contribution to journalArticle

Abstract

Somatic cell count (SCC) in milk is widely used in the dairy industry, as an indicator of the health of mammary gland. While the SCC of dairy cattle was higher in late lactation than in peak lactation, its association with gene expressions of mammary gland were largely unknown. In this study, a transcriptomic sequencing approach and bioinformatics analysis were used to investigate the differential expressed genes (DEGs) associated with inflammation and immunity between peak and late periods of lactation in Chinese Holstein. A total of 446 DEGs (padj < 0.05 and fold change >2) were identified, 50 of which belonged to seven pathways and five terms related to inflammation and immunity. Our data suggested that the activation of nuclear transcription factor-κB (NF-κB) pathway and Toll-like receptor signaling pathway caused inflammatory response, and the activation of chemokine signaling pathway and cytokine–cytokine receptor interaction signaling pathway caused a protective immune response to ensure dairy cows health during late lactation. Our findings deepen the understanding of the molecular mechanism and physiological functions of mammary inflammation in Chinese Holstein during late lactation.

Original languageEnglish (US)
Article number510
JournalAnimals
Volume10
Issue number3
DOIs
StatePublished - Mar 2020

Keywords

  • Chinese Holstein
  • Differentially expressed genes
  • Lactation initiation
  • Mammary gland
  • Transcriptome

ASJC Scopus subject areas

  • Animal Science and Zoology
  • veterinary(all)

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