2. Academic Validation
  3. Antimicrobial peptide expression in swine granulosa cells in response to lipopolysaccharide

Antimicrobial peptide expression in swine granulosa cells in response to lipopolysaccharide

  • Theriogenology. 2018 Oct 1;119:80-90. doi: 10.1016/j.theriogenology.2018.06.011.
Xiaofeng Sun 1,  Fangming Xiu 2,  Bo Pan 3,  Yapeng Li 4,  James T Haskins 3,  Wei Shen 5,  Julang Li 6
Affiliations

Affiliations

  • 1 College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China; Department of Animal BioSciences, University of Guelph, Guelph, Ontario, Canada.
  • 2 Department of Animal BioSciences, University of Guelph, Guelph, Ontario, Canada; Translational Medicine, The SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada.
  • 3 Department of Animal BioSciences, University of Guelph, Guelph, Ontario, Canada.
  • 4 College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, 266109, China.
  • 5 College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China. Electronic address: shenwei427@163.com.
  • 6 Department of Animal BioSciences, University of Guelph, Guelph, Ontario, Canada. Electronic address: jli@uoguelph.ca.
PMID: 29982140 DOI: 10.1016/j.theriogenology.2018.06.011
Abstract

Antimicrobial Peptides (AMP) are host defense Peptides present in all species examined. The objective of the current study was to characterize the expression of a group of antimicrobial Peptides in ovarian cells, and to investigate their expression response to pathogen ligands. It was found that while PG1 transcript was not detected in the ovary, the expression of BD2 is the highest in small follicle derived granulosa cells (SGC), and its expression decreases during follicular development to large follicle stage (LGC; p < 0.05). The expression of BD2 in cumulus cells also decreased from GV to MII stage of oocyte maturation. ANG4 expression increased in granulosa cells during follicular development from SGC to LGC stage (p < 0.05), although no significant difference was observed in cumulus cells from different stages of oocyte maturation. We further examined AMP expression in follicle cells treated with different Toll-like Receptor (TLR) ligands which mimic pathogen exposure in the ovary. Of the four TLR ligands examined, lipopolysaccharide (LPS) exposure resulted in a 11.5 fold increase of BD2 expression, and a significant decrease of LYZ in LGC. A similar response pattern in BD2 and LYZ expression was also observed in SGC. These responses of AMP expression to LPS are associated with increased TLR4 signaling pathway component in mRNA and protein level, such as MyD88 and NFkB, and pro-inflammatory cytokines/chemokines, such as IL-6, TNFα and IL-8 (p < 0.05). Our data suggest that AMPs may play a role in innate defense as well as Other physiological functions during ovarian follicular development and oocyte maturation.

Keywords

Antimicrobial peptide; Defensin; Granulosa cell; Innate immunity; Ovary.

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