Research Article

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ATP1A1 gene; Dairy cattle; Heat stress; K+-ATPase; Na+; SNP

Heat stress produces oxidative stress and affects the alternation of plasma K+ and Na+. Since Na+,K+-ATPase is sensitive to oxidative stress and critical for maintaining the homeostasis of these two ions, we examined the genetic polymorphism of the ATP1A1 gene in 160 Holstein cows using polymerase chain reaction low ionic strength ... more

Y.X. Liu; X. Zhou; D.Q. Li; Q.W. Cui; G.L. Wang
Mastitis; PCR-PIRA; PCR-RFLP; Percentage of fat; PGLYRP-2 gene; Polymorphism

Peptidoglycan recognition protein 2 (PGLYRP-2), which belongs to the PGRP family, is the only member that has no direct bactericidal activity but has N-acetylmuramoyl-l-alanine amidase activity. This feature of PGLYRP-2 indicates that it may play an important role in eliminating the pathogen associated molecular pattern (PAMP), such as peptidoglycan (PGN), which can reduce ... more

H.L. Wang; Z.X. Li; L. Chen; J. Yang; L.J. Wang; H. He; F.B. Niu; Y. Liu; J.Z. Guo; X.L. Liu
DNA; Extraction; Mastitis; Real-time polymerase chain reaction; Staphylococcus aureus

The aim of this study was to evaluate the repeatability and performance of 4 methods of extracting DNA from Staphylococcus aureus (SAU) and the gene encoding bovine mitochondrial cytochrome B (BMCB) in milk samples from cows with subclinical mastitis for use in amplification by real-time polymerase chain reaction. Two milk samples were obtained from cows naturally infected with ... more

A.G. Dibbern; B.G. Botaro; M.P. Viziack; L.F.P. Silva; M.V. Santos
Alternative splicing; Dairy cattle; Lactoferrin gene; Mastitis

Bovine lactoferrin (bLF) is a member of the transferrin family; it plays an important role in the innate immune response. We identified novel splice variants of the bLF gene in mastitis-infected and healthy cows. Reverse transcription-polymerase chain reaction (RT-PCR) and clone sequencing analysis were used to screen the splice variants of the bLF gene in the mammary ... more

J.M. Huang; Z.Y. Wang; Z.H. Ju; C.F. Wang; Q.L. Li; T. Sun; Q.L. Hou; S.Q. Hang; M.H. Hou; J.F. Zhong
Dairy cattle; Lactoferrin; Mastitis; TLR4

Mastitis remains a major cattle disease with great global economic implications. Various approaches are currently employed in attempts to improve understanding of mastitis resistance and develop phenotypic markers for use in breeding programs (e.g., somatic cell score), including QTL discovery, wide-genome association studies, and identification of candidate genes related to immune ... more

A.M. Carvajal; P. Huircan; A. Lepori
Alternative splicing; C4A gene; Dairy cattle; Mastitis; Transcription pattern

The complement system helps in the direct lysis of invading pathogens and modulates phagocytic, humoral and cellular immune responses. Complement 4 is a critical component in complement activity and protection against many bacterial pathogens because it is essential to classical and lectin activation pathways. We used reverse transcription and PCR to investigate alternative splicing and ... more

Y. Yang; J.M. Huang; Z.H. Ju; Q.L. Li; L. Zhou; R.L. Li; J.B. Li; F.X. Shi; J.F. Zhong; C.F. Wang
Mastitis; Milk proteins; Two-dimensional gel electrophoresis

Under the traditional grazing system on the Qinghai-Tibetan Plateau, the amount of milk in domesticated yak (Bos grunniens) with clinical mastitis decreases and the milk composition is altered. To understand the mechanisms of mammary gland secreted milk and disease infection, changes in the protein composition of milk during clinical mastitis were investigated using a proteomic ... more

X. Li; X.Z. Ding; Y.L. Wan; Y.M. Liu; G.Z. Du
Betaine; Dairy cow; Heat stress

This study aimed to determine whether feeding betaine to cows elevates their production performance during summer heat stress. Thirty-two lactating Holstein cows were randomly divided into 4 groups: the control group, which received a total mixed ration (TMR), and 3 experimental groups that received TMR blended with 10 g/day (group I), 15 g/day (group II), and 20 g/day (group III) betaine ... more

L. Zhang; S.J. Ying; W.J. An; H. Lian; G.B. Zhou; Z.Y. Han
Dairy cow; Lipid metabolism genes; Lipopolysaccharide; Primary hepatocyte; Toll-like receptor 4 signaling pathway

The influence of ruminal acidosis on ruminal microbiology and metabolite production has received considerable attention, but little is known regarding the systemic manifestations that arise from ruminal acidosis. Lipopolysaccharide (LPS) is released in the gastrointestinal tract upon ingestion of high-grain or high-fat diets, and it has been implicated in the etiology of multiple energy- ... more

Y.Y. Wang; H.P. Li; X.J. Wang; Q.D. Jiang; J. Geng; L.F. Wang; Y.J. Guo; W.F. Lu; H.S. Zhu; G.Y. Yang
Brangus; Carcass; DNA; Growth; Growth hormone; SNP

Sequence polymorphisms in the growth hormone (GH) gene and its transcriptional regulators, Pit-1 and Prop-1, were evaluated for associations with growth and carcass traits in two populations of Brangus bulls Chihuahuan Desert Rangeland Research Center (CDRRC, N = 248 from 14 sires) and a cooperating breeding program (COOP, N = 186 from 34 sires). Polymorphisms were SNP mutations in intron 4 (C ... more

M.G. Thomas; R.M. Enns; K.L. Shirley; M.D. Garcia; A.J. Garrett; G.A. Silver