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Leukotriene B(4) receptor locus gene characterisation and association studies in asthma

BACKGROUND: Polymorphisms spanning genes involved in the production of leukotriene B(4) (LTB(4)) e.g. ALOX5AP and LTA4H are associated with asthma susceptibility, suggesting a role for LTB(4) in disease. The contribution of LTB(4)receptor polymorphism is currently unknown. The aim of this study was...

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Autores principales: Tulah, Asif S, Beghé, Bianca, Barton, Sheila J, Holloway, John W, Sayers, Ian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3607986/
https://www.ncbi.nlm.nih.gov/pubmed/23167751
http://dx.doi.org/10.1186/1471-2350-13-110
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author Tulah, Asif S
Beghé, Bianca
Barton, Sheila J
Holloway, John W
Sayers, Ian
author_facet Tulah, Asif S
Beghé, Bianca
Barton, Sheila J
Holloway, John W
Sayers, Ian
author_sort Tulah, Asif S
collection PubMed
description BACKGROUND: Polymorphisms spanning genes involved in the production of leukotriene B(4) (LTB(4)) e.g. ALOX5AP and LTA4H are associated with asthma susceptibility, suggesting a role for LTB(4) in disease. The contribution of LTB(4)receptor polymorphism is currently unknown. The aim of this study was to characterise the genes for the two pivotal LTB(4) receptors, LTB4R1 and LTB4R2 in lung tissue and determine if polymorphisms spanning these genes are associated with asthma and disease severity. METHODS: Rapid amplification of cDNA ends (RACE) was used to characterise the LTB4R1 and LTB4R2 gene structure in lung. The LTB4R1/2 locus on chromosome 14q11.2 was screened for polymorphic variation. Six LTB4R single nucleotide polymorphisms (SNPs) were genotyped in 370 Caucasian asthma families and 299 Adult Asthma Individuals (n=1877 total) and were evaluated for association with asthma and severity (BTS) outcome measures using Family Based Association Test, linear regression and chi square. RESULTS: LTB4R1 has complex mRNA arrangement including multiple 5′-untranslated exons, suggesting additional levels of regulation. Three potential promoter regions across the LTB4R1/2 locus were identified with some airway cell specificity. 22 SNPs (MAF>0.01) were validated across the LTB4R locus in the Caucasian population. LTB4R1 and LTB4R2 SNPs were not associated with asthma susceptibility, FEV(1) or severity. CONCLUSIONS: LTB4R1 and LTB4R2 shows splice variation in the 5′-untranslated region and multiple promoter regions. The functional significance of this is yet to be determined. Both receptor genes were shown to be polymorphic. LTB4R polymorphisms do not appear to be susceptibility markers for the development of asthma in Caucasian subjects.
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spelling pubmed-36079862013-03-27 Leukotriene B(4) receptor locus gene characterisation and association studies in asthma Tulah, Asif S Beghé, Bianca Barton, Sheila J Holloway, John W Sayers, Ian BMC Med Genet Research Article BACKGROUND: Polymorphisms spanning genes involved in the production of leukotriene B(4) (LTB(4)) e.g. ALOX5AP and LTA4H are associated with asthma susceptibility, suggesting a role for LTB(4) in disease. The contribution of LTB(4)receptor polymorphism is currently unknown. The aim of this study was to characterise the genes for the two pivotal LTB(4) receptors, LTB4R1 and LTB4R2 in lung tissue and determine if polymorphisms spanning these genes are associated with asthma and disease severity. METHODS: Rapid amplification of cDNA ends (RACE) was used to characterise the LTB4R1 and LTB4R2 gene structure in lung. The LTB4R1/2 locus on chromosome 14q11.2 was screened for polymorphic variation. Six LTB4R single nucleotide polymorphisms (SNPs) were genotyped in 370 Caucasian asthma families and 299 Adult Asthma Individuals (n=1877 total) and were evaluated for association with asthma and severity (BTS) outcome measures using Family Based Association Test, linear regression and chi square. RESULTS: LTB4R1 has complex mRNA arrangement including multiple 5′-untranslated exons, suggesting additional levels of regulation. Three potential promoter regions across the LTB4R1/2 locus were identified with some airway cell specificity. 22 SNPs (MAF>0.01) were validated across the LTB4R locus in the Caucasian population. LTB4R1 and LTB4R2 SNPs were not associated with asthma susceptibility, FEV(1) or severity. CONCLUSIONS: LTB4R1 and LTB4R2 shows splice variation in the 5′-untranslated region and multiple promoter regions. The functional significance of this is yet to be determined. Both receptor genes were shown to be polymorphic. LTB4R polymorphisms do not appear to be susceptibility markers for the development of asthma in Caucasian subjects. BioMed Central 2012-11-20 /pmc/articles/PMC3607986/ /pubmed/23167751 http://dx.doi.org/10.1186/1471-2350-13-110 Text en Copyright ©2012 Tulah et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Tulah, Asif S
Beghé, Bianca
Barton, Sheila J
Holloway, John W
Sayers, Ian
Leukotriene B(4) receptor locus gene characterisation and association studies in asthma
title Leukotriene B(4) receptor locus gene characterisation and association studies in asthma
title_full Leukotriene B(4) receptor locus gene characterisation and association studies in asthma
title_fullStr Leukotriene B(4) receptor locus gene characterisation and association studies in asthma
title_full_unstemmed Leukotriene B(4) receptor locus gene characterisation and association studies in asthma
title_short Leukotriene B(4) receptor locus gene characterisation and association studies in asthma
title_sort leukotriene b(4) receptor locus gene characterisation and association studies in asthma
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3607986/
https://www.ncbi.nlm.nih.gov/pubmed/23167751
http://dx.doi.org/10.1186/1471-2350-13-110
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