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Res Vet Sci. 2018 Dec;121:130-133. doi: 10.1016/j.rvsc.2018.10.015. Epub 2018 Oct 30.

Endometrial expression of the acute phase molecule SAA is more significant than HP in reflecting the severity of endometritis.

Author information

1
Chinese Academy of Agricultural Sciences, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Lanzhou 730050, China. Electronic address: sdzhang2006@126.com.
2
Chinese Academy of Agricultural Sciences, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Lanzhou 730050, China.
3
Department of Veterinary Obstetrics and Reproductive Diseases, University of Nigeria, Nsukka 410001, Nigeria.
4
Chinese Academy of Agricultural Sciences, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Lanzhou 730050, China. Electronic address: yanzuoting@caas.cn.

Abstract

This study investigated the correlation between endometrial local expressions of serum amyloid A (SAA) and haptoglobin (Hp) and severity of endometritis in 20 Chinese Holstein dairy cows at 40-60 days postpertum, aged 3-6, and 2-5 parities. Endometrial biopsies were collected and categorized into normal, mild endometritis, and severe endometritis based on clinical signs and histopathology. The protein and mRNA expression of SAA and Hp in endometrial tissue were measured using western blot and real-time PCR, respectively. Furthermore, bovine endometrial epithelial cells were isolated and cultured in vitro. The protein and mRNA expression of SAA and Hp were also determined in the cells treated with increasing concentrations of lipopolysaccharide (LPS; 0, 1, 5, 10 μg/ml). The results showed that both of protein and mRNA of SAA was increased in endometritis or in LPS-stimulated cells, and the increases were positively correlated with severity of endometritis in vivo or LPS stimulation strength in vitro. Meanwhile, protein expression of Hp were also increased in endometritis or in LPS-stimulated cells, but the increases were negatively correlative with severity of inflammation as well as mRNA expression of Hp in vivo or in vitro. Therefore, our results suggest that endometrial local expression of SAA is more significant than Hp as a potential biomarker to assess severity of endometritis in cows.

KEYWORDS:

Endometritis; Haptoglobin; Lipopolysaccharide; Serum amyloid a

PMID:
30408641
DOI:
10.1016/j.rvsc.2018.10.015
[Indexed for MEDLINE]

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