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Mannose-binding lectin 1 haplotypes influence serum MBL-A concentration, complement activity, and milk production traits in Chinese Holstein cattle

文献类型： 外文期刊

作者： Liu, Jianbo 1 ; Ju, Zhihua 1 ; Li, Qiuling 1 ; Huang, Jinming 1 ; Li, Rongling 1 ; Li, Jiangbin 1 ; Ma, Lijuan 3 ; Zhong, 1 ;

作者机构： 1.Shandong Acad Agr Sci, Dairy Cattle Res Ctr, Jinan 250100, Shandong, Peoples R China

2.Jilin Agr Univ, Coll Chinese Med Mat, Changchun 130118, Peoples R China

3.Jilin Agr Sci & Technol Coll, Jinlin 132101, Peoples R China

关键词： Mannose-binding lectin;Haplotype;MBL-A level;Complement activity;Bovine

期刊名称：IMMUNOGENETICS （ 影响因子：2.846； 五年影响因子：2.814 ）

ISSN： 0093-7711

年卷期： 2011 年 63 卷 11 期

页码：

收录情况： SCI

摘要： Mannose-binding lectin (MBL) is a member of the collectin protein family that binds a broad range of microorganisms and activates the lectin-complement pathway of innate immunity. MBL deficiency is associated with an increased risk for various infections and arises from five polymorphisms in the promoter and first exon of the MBL gene in humans. In this study, three novel single-nucleotide polymorphisms (SNPs) in the promoter region and two previously reported SNPs in exon 2 of the MBL1 gene were detected using PCR single-strand conformation polymorphism, restriction fragment length polymorphism, and DNA sequencing in 537 cattle from three Chinese breeds. Analysis of the genotypes and haplotypes was used to investigate the polymorphisms and their possible implications, especially their association with serum MBL-A levels, complement activity (CH50 and ACH50), and milk production traits was investigated. The g. 2651G>A SNP in exon 2 affected the serum MBL-A concentrations and the serum CH50 values, whereas the g.-1330G>A SNP significantly affected CH50 and the somatic cell scores (SCSs). Statistical analysis revealed that cows with the ATGGC/ ACAAC combined genotype and those with the AAGGT/ ACGGT combined genotype exhibited the lowest and highest SCSs, respectively. Serum antibacterial activities were also conducted to verify the effect of the SNPs on resistance to mastitis pathogens. Results of real-time PCR showed that the liver of cows with clinical mastitis exhibited a higher MBL1 expression compared with healthy ones (P< 0.05). Findings of this study indicate that the MBL1 gene possibly contributes to bacterial infection resistance and can be used as a molecular marker of milk production traits to control mastitis.

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