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Zhang Z, Wang X, Li R, Ju Z, Qi C, Zhang Y, Guo F, Luo G, Li Q, Wang C, Zhong J, Xu Y, Huang J. Genetic mutations potentially cause two novel NCF1 splice variants up-regulated in the mammary gland, blood and neutrophil of cows infected by Escherichia coli. Microbiol Res 2015; 174:24-32. [PMID: 25946326 DOI: 10.1016/j.micres.2015.03.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/07/2015] [Accepted: 03/09/2015] [Indexed: 11/18/2022]
Abstract
Neutrophil cytosolic factor 1 (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.
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Affiliation(s)
- Zijing Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Xiuge Wang
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1)
| | - Rongling Li
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1)
| | - Zhihua Ju
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1)
| | - Chao Qi
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1)
| | - Yan Zhang
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1)
| | - Fang Guo
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Guojing Luo
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Qiuling Li
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1)
| | - Changfa Wang
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1)
| | - Jifeng Zhong
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1)
| | - Yinxue Xu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
| | - Jinming Huang
- Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, No. 159 North of Industry Road, Jinan, Shandong 250131, People's Republic of China(1).
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Variants of the lamin A/C (LMNA) gene in non-valvular atrial fibrillation patients: a possible pathogenic role of the Thr528Met mutation. Mol Diagn Ther 2012; 16:99-107. [PMID: 22413764 DOI: 10.1007/bf03256434] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
BACKGROUND AND OBJECTIVE Lamin A/C (LMNA) gene mutations cause dilated cardiomyopathy, often accompanied by conduction disturbances. Our aim was to search for LMNA mutations in individuals with atrial fibrillation. METHODS A cohort of Polish subjects (N = 103) with non-valvular atrial fibrillation with a high (48.5%) prevalence of conduction system disturbances was screened for LMNA variants by direct DNA sequencing. RESULTS We found a single non-synonymous variant (Thr528Met) in a 72-year-old patient with normal left ventricular function and episodes of advanced atrioventricular block. One of his two mutation-carrying daughters had episodes of type I second-degree atrioventricular block on a 24-hour Holter ECG and peak exercise arrhythmia. Interpretation of cardiac anomalies observed in the other daughter was complicated by thyroid insufficiency. A Thr528Met weak pathogenic effect was supported by transient transfections of C2C12 mouse myoblasts and computationally. Another interesting variant was Ile26Ile (c.78C>T), found in a New York Heart Association class III patient with a depressed left ventricular ejection fraction (30%), left bundle branch block, and a family history of heart disease. Ile26Ile was absent in 246 healthy individuals and was computationally predicted to interfere with splicing. CONCLUSION LMNA mutations are not a frequent cause of atrial fibrillation even when conduction disease is present. Unlike the majority of LMNA mutations clearly associated with a severe clinical phenotype and a poor prognosis, Thr528Met results in a more subtle pathogenic effect, while Ile26Ile should be considered as a variant of unknown significance.
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Chiba-Falek O, Nichols M, Suchindran S, Guyton J, Ginsburg GS, Barrett-Connor E, McCarthy JJ. Impact of gene variants on sex-specific regulation of human Scavenger receptor class B type 1 (SR-BI) expression in liver and association with lipid levels in a population-based study. BMC MEDICAL GENETICS 2010; 11:9. [PMID: 20085651 PMCID: PMC2822818 DOI: 10.1186/1471-2350-11-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2009] [Accepted: 01/19/2010] [Indexed: 02/03/2023]
Abstract
BACKGROUND Several studies have noted that genetic variants of SCARB1, a lipoprotein receptor involved in reverse cholesterol transport, are associated with serum lipid levels in a sex-dependent fashion. However, the mechanism underlying this gene by sex interaction has not been explored. METHODS We utilized both epidemiological and molecular methods to study how estrogen and gene variants interact to influence SCARB1 expression and lipid levels. Interaction between 35 SCARB1 haplotype-tagged polymorphisms and endogenous estradiol levels was assessed in 498 postmenopausal Caucasian women from the population-based Rancho Bernardo Study. We further examined associated variants with overall and SCARB1 splice variant (SR-BI and SR-BII) expression in 91 human liver tissues using quantitative real-time PCR. RESULTS Several variants on a haplotype block spanning intron 11 to intron 12 of SCARB1 showed significant gene by estradiol interaction affecting serum lipid levels, the strongest for rs838895 with HDL-cholesterol (p=9.2x10(-4)) and triglycerides (p=1.3x10(-3)) and the triglyceride:HDL cholesterol ratio (p=2.7x10(-4)). These same variants were associated with expression of the SR-BI isoform in a sex-specific fashion, with the strongest association found among liver tissue from 52 young women<45 years old (p=0.002). CONCLUSIONS Estrogen and SCARB1 genotype may act synergistically to regulate expression of SCARB1 isoforms and impact serum levels of HDL cholesterol and triglycerides. This work highlights the importance of considering sex-dependent effects of gene variants on serum lipid levels.
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Affiliation(s)
- Ornit Chiba-Falek
- Institute for Genome Sciences and Policy, Duke University Medical Center, Durham, NC 27710, USA
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