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Genetic mutations potentially cause two novel NCF1 splice variants up-regulated in the mammary gland, blood and neutrophil of cows infected by Escherichia coli

文献类型： 外文期刊

作者： Zhang, Zijing 1 ; Wang, Xiuge 2 ; Li, Rongling 2 ; Ju, Zhihua 2 ; Qi, Chao 2 ; Zhang, Yan 2 ; Guo, Fang 1 ; Luo, Guojing; 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Anim Sci & Technol, Nanjing 210095, Jiangsu, Peoples R China

2.Shandong Acad Agr Sci, Dairy Cattle Res Ctr, Jinan 250131, Shandong, Peoples R China

3.Shandong Acad Agr Sci, Dairy Cattle Res Ctr, Jinan 250131, Shandong, Peoples R Chi

关键词： NCF1 gene;Aberrant splicing;Functional SNP;Mastitis;Cattle

期刊名称：MICROBIOLOGICAL RESEARCH （ 影响因子：5.415； 五年影响因子：6.038 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Neutrophil cytosolic factor I (NCF1) plays a crucial role in host defense against microbial pathogens. In this study, we investigated the potential alternative splicing patterns, expression and splice-relevant single nucleotide polymorphisms (SNPs) of the bovine NCF1 gene to increase insights into its potential role against bovine mastitis caused by Escherichia coli infection. Using RT-PCR and clone sequencing methods, we found two novel splice variants designed as NCF1-TV1 (retained intron 6) and NCF1-TV2 (retained part of intron 8), respectively, encoding two putative truncated proteins (239AA and 283AA). Two splice variants were drastically up-regulated in the mastitis-infected cows' mammary tissues, blood and neutrophils compared with these of healthy cows using real-time RT-PCR. Genomic sequencing analysis identified four novel SNPs g.10112 G>A, g.10766 T>C, SNPs g.12085 G>A and g.12430 T>C at the ends of intron 6 and intron 8 of NCF1. ESE motif predicted that the SNP (g.10766 T>C) might affect the binding with splicing-related factors and subsequently caused the production of aberrant splice variant NCF1-TV1, which is one of the potential reasons that the functional SNP was associated with increased milk somatic cell score in cow. Our results would help in better understanding the NCF1 gene function in the process against pathogen infection, and the effect of splicing-related SNP on the production of aberrant splice variant and careful functional characterization in dairy cattle. (C) 2015 Elsevier GmbH. All rights reserved.

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