›› 2018, Vol. 45 ›› Issue (7): 1926-1932.doi: 10.16431/j.cnki.1671-7236.2018.07.025

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Methylation Analysis of CDH13 Gene in Mastitis Induced by Staphylococcus aureus in Chinese Holstein

WANG Mengqi, NI Wei, TANG Cheng, GUO Jiahe, ZHANG Huimin, LI Mingxun, YANG Zhangping, MAO Yongjiang   

  1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
  • Received:2017-12-13 Online:2018-07-20 Published:2018-07-20

Abstract:

In order to explore the regulatory mechanism of cadherin 13 (CDH13) gene methylation in mastitis caused by Staphylococcus aureus in dairy cows,the CDH13 gene methylation levels of healthy and mastitis infected mammary tissue were tested by bisulfite sequencing PCR (BSP),and the relationship between the level of CDH13 gene methylation and expression was analyzed.The results showed that,all of the CpG islands except the twelfth CpG of experimental group showed different levels of methylation.The methylation level was the highest in -259 (50% to 60%),and those at -144,-135 and -126 were low,which were all about 5%.The overall methylation level of experimen and control groups ware 10.13%±1.81% and 14.43%±0.55%,respectively,and there was no significant difference between different loci and overall methylation rate of this two groups (P>0.05).Compared with the healthy tissue,the expression of CDH13 gene in mammary tissue which were inflected by mastitis was up-regulation,the methylation level of -162 and -93 CpG islands were significantly negatively correlated with gene expression (P<0.05).The methylation of CDH13 gene affected its expression,thus affecting the occurrence of mastitis.These provided a reference for further exploring the pathogenesis of Staphylococcus aureus pathogenic mastitis.

Key words: CDH13 gene; mastitis; methylation; Chinese Holstein

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