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SNPs Sets in Codifying Genes for Xenobiotics-Processing Enzymes Are Associated with COPD Secondary to Biomass-Burning Smoke. Curr Issues Mol Biol 2023; 45:799-819. [PMID: 36825998 PMCID: PMC9954820 DOI: 10.3390/cimb45020053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/11/2023] [Accepted: 01/11/2023] [Indexed: 01/19/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is the third leading cause of death worldwide; the main risk factors associated with the suffering are tobacco smoking (TS) and chronic exposure to biomass-burning smoke (BBS). Different biological pathways have been associated with COPD, especially xenobiotic or drug metabolism enzymes. This research aims to identify single nucleotide polymorphisms (SNPs) profiles associated with COPD from two expositional sources: tobacco smoking and BBS. One thousand-five hundred Mexican mestizo subjects were included in the study and divided into those exposed to biomass-burning smoke and smokers. Genome-wide exome genotyping was carried out using Infinium Exome-24 kit arrays v. 1.2. Data quality control was conducted using PLINK 1.07. For clinical and demographic data analysis, Rstudio was used. Eight SNPs were found associated with COPD secondary to TS and seven SNPs were conserved when data were analyzed by genotype. When haplotype analyses were carried out, five blocks were predicted. In COPD secondary to BBS, 24 SNPs in MGST3 and CYP family genes were associated. Seven blocks of haplotypes were associated with COPD-BBS. SNPs in the ARNT2 and CYP46A1 genes are associated with COPD secondary to TS, while in the BBS comparison, SNPs in CYP2C8, CYP2C9, MGST3, and MGST1 genes were associated with increased COPD risk.
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The Serpin Superfamily and Their Role in the Regulation and Dysfunction of Serine Protease Activity in COPD and Other Chronic Lung Diseases. Int J Mol Sci 2021; 22:ijms22126351. [PMID: 34198546 PMCID: PMC8231800 DOI: 10.3390/ijms22126351] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/01/2021] [Accepted: 06/04/2021] [Indexed: 12/21/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a debilitating heterogeneous disease characterised by unregulated proteolytic destruction of lung tissue mediated via a protease-antiprotease imbalance. In COPD, the relationship between the neutrophil serine protease, neutrophil elastase, and its endogenous inhibitor, alpha-1-antitrypsin (AAT) is the best characterised. AAT belongs to a superfamily of serine protease inhibitors known as serpins. Advances in screening technologies have, however, resulted in many members of the serpin superfamily being identified as having differential expression across a multitude of chronic lung diseases compared to healthy individuals. Serpins exhibit a unique suicide-substrate mechanism of inhibition during which they undergo a dramatic conformational change to a more stable form. A limitation is that this also renders them susceptible to disease-causing mutations. Identification of the extent of their physiological/pathological role in the airways would allow further expansion of knowledge regarding the complexity of protease regulation in the lung and may provide wider opportunity for their use as therapeutics to aid the management of COPD and other chronic airways diseases.
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Paci P, Fiscon G, Conte F, Licursi V, Morrow J, Hersh C, Cho M, Castaldi P, Glass K, Silverman EK, Farina L. Integrated transcriptomic correlation network analysis identifies COPD molecular determinants. Sci Rep 2020; 10:3361. [PMID: 32099002 PMCID: PMC7042269 DOI: 10.1038/s41598-020-60228-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 01/23/2020] [Indexed: 12/17/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a complex and heterogeneous syndrome. Network-based analysis implemented by SWIM software can be exploited to identify key molecular switches - called "switch genes" - for the disease. Genes contributing to common biological processes or defining given cell types are usually co-regulated and co-expressed, forming expression network modules. Consistently, we found that the COPD correlation network built by SWIM consists of three well-characterized modules: one populated by switch genes, all up-regulated in COPD cases and related to the regulation of immune response, inflammatory response, and hypoxia (like TIMP1, HIF1A, SYK, LY96, BLNK and PRDX4); one populated by well-recognized immune signature genes, all up-regulated in COPD cases; one where the GWAS genes AGER and CAVIN1 are the most representative module genes, both down-regulated in COPD cases. Interestingly, 70% of AGER negative interactors are switch genes including PRDX4, whose activation strongly correlates with the activation of known COPD GWAS interactors SERPINE2, CD79A, and POUF2AF1. These results suggest that SWIM analysis can identify key network modules related to complex diseases like COPD.
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Affiliation(s)
- Paola Paci
- Institute for Systems Analysis and Computer Science "Antonio Ruberti", National Research Council, Rome, Italy.
| | - Giulia Fiscon
- Institute for Systems Analysis and Computer Science "Antonio Ruberti", National Research Council, Rome, Italy
| | - Federica Conte
- Institute for Systems Analysis and Computer Science "Antonio Ruberti", National Research Council, Rome, Italy
| | - Valerio Licursi
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Rome, Italy
| | - Jarrett Morrow
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Craig Hersh
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Michael Cho
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Peter Castaldi
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Kimberly Glass
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Edwin K Silverman
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Lorenzo Farina
- Department of Computer, Control and Management Engineering, Sapienza University of Rome, Rome, Italy
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Li L, Li SY, Zhong X, Ren J, Tian X, Tuerxun M, Xie C, Li F, Zheng A, Aini P, Yasen M, Wang H, Zou X. SERPINE2 rs16865421 polymorphism is associated with a lower risk of chronic obstructive pulmonary disease in the Uygur population: A case-control study. J Gene Med 2019; 21:e3106. [PMID: 31215134 DOI: 10.1002/jgm.3106] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 05/12/2019] [Accepted: 06/05/2019] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The present study aimed to investigate the relationship between seven polymorphisms of the serine protease inhibitor-2 (SERPINE2) gene and the risk of chronic obstructive pulmonary disease (COPD) in the Uygur population via a case-control study. METHODS In total, 440 Uygur patients with COPD were included in the patient group and 384 healthy individuals were recruited in the matched control group. Data on demographic variables, smoking status, occupational dust exposure history and living conditions were collected. Polymorphism analysis was performed for seven loci of the SERPINE2 gene by mass spectrometry. RESULTS The genotype distribution of rs16865421 showed a significant difference between the patient and control groups (p < 0.05). Participants carrying the rs16865421-AG heterozygous mutant genotype had a lower risk of COPD compared to those with the rs16865421-A allele (odds ratio = 0.68, 95% confidence interval = 0.47-0.98, p = 0.041). However, no such association was found for rs1438831, rs6734100, rs6748795, rs7583463, rs840088 and rs975278. No significant interaction was observed between the genotypes and risk factors. CONCLUSIONS Polymorphisms of rs16865421-AG carried by the Uygur population may be protective against COPD.
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Affiliation(s)
- Li Li
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Shi Yue Li
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Guangzhou Medical University, Guangdong, Guangzhou, Guangdong, China
| | - Xuemei Zhong
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Jie Ren
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Xuwei Tian
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Maimaitiaili Tuerxun
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Chengxin Xie
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Feifei Li
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Aifang Zheng
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Paierda Aini
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Mukeremu Yasen
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Huaizhen Wang
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
| | - Xiaoguang Zou
- Department of Respiratory and Critical Care Medicine, First People's Hospital of Kashgar, Xinjiang, Kashgar, Xinjiang, China
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Ambrocio-Ortiz E, Pérez-Rubio G, Abarca-Rojano E, Montaño M, Ramos C, Hernández-Zenteno RD, Del Angel-Pablo AD, Reséndiz-Hernández JM, Ramírez-Venegas A, Falfán-Valencia R. Influence of proinflammatory cytokine gene polymorphisms on the risk of COPD and the levels of plasma protein. Cytokine 2018; 111:364-370. [DOI: 10.1016/j.cyto.2018.09.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 09/05/2018] [Accepted: 09/26/2018] [Indexed: 01/10/2023]
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Kim WJ, Park HJ, Choi YJ, Kwon EY, Kim BM, Lee JH, Chang JH, Lee Kang J, Choi JH. Association between Genetic Variations of MERTK and Chronic Obstructive Pulmonary Disease in Koreans. J Korean Med Sci 2018; 33:e56. [PMID: 29359540 PMCID: PMC5785628 DOI: 10.3346/jkms.2018.33.e56] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/12/2017] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) is a debilitating lung disease. To date, a large number of clinical studies have been conducted to investigate the association between genetic variations and COPD. However, little is known regarding the genetic susceptibility of Koreans to this disease. MER receptor tyrosine kinase (MERTK) plays important roles in the inhibition of inflammation and in the clearance of apoptotic cells. Here, we investigated the association between genetic variations in MERTK and the development of COPD in Koreans. METHODS We conducted genetic analysis of MERTK using genomic DNA samples from 87 patients with COPD and 88 healthy controls and compared the frequency of each variation or haplotype between the patient and control groups. Subsequently, the effect of each variation was evaluated using in vitro assays. RESULTS Ten variations were identified in this study, four of them for the first time. In addition, we found that the frequency of each variation or haplotype was comparable between the patient and control groups. However, we observed that the frequency for the wild-type haplotype was higher in the control group, compared to that in the group of patients with COPD, in the subgroup analysis of current smokers, although the difference was not statistically significant (P = 0.080). In in vitro assays, we observed that none of the variations affected the activity of the promoter or the expression of MERTK. CONCLUSION Our findings indicate that the susceptibility to COPD is not related to the genetic variations or haplotypes of MERTK in Koreans.
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Affiliation(s)
- Woo Jin Kim
- Department of Internal Medicine and Environmental Health Center, Kangwon National University, Chuncheon, Korea
| | - Hyo Jin Park
- Department of Pharmacology, Tissue Injury Defense Research Center, College of Medicine, Ewha Womans University, Seoul, Korea
| | - Yang Ji Choi
- Department of Pharmacology, Tissue Injury Defense Research Center, College of Medicine, Ewha Womans University, Seoul, Korea
| | - Eun Young Kwon
- Department of Pharmacology, Tissue Injury Defense Research Center, College of Medicine, Ewha Womans University, Seoul, Korea
| | - Bo Min Kim
- Department of Pharmacology, Tissue Injury Defense Research Center, College of Medicine, Ewha Womans University, Seoul, Korea
| | - Jin Hwa Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Korea
| | - Jung Hyun Chang
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Korea
| | - Jihee Lee Kang
- Department of Physiology, Tissue Injury Defense Research Center, College of Medicine, Ewha Womans University, Seoul, Korea
| | - Ji Ha Choi
- Department of Pharmacology, Tissue Injury Defense Research Center, College of Medicine, Ewha Womans University, Seoul, Korea.
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Solleti SK, Srisuma S, Bhattacharya S, Rangel-Moreno J, Bijli KM, Randall TD, Rahman A, Mariani TJ. Serpine2 deficiency results in lung lymphocyte accumulation and bronchus-associated lymphoid tissue formation. FASEB J 2016; 30:2615-26. [PMID: 27059719 DOI: 10.1096/fj.201500159r] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/28/2016] [Indexed: 11/11/2022]
Abstract
Serine proteinase inhibitor, clade E, member 2 (SERPINE2), is a cell- and extracellular matrix-associated inhibitor of thrombin. Although SERPINE2 is a candidate susceptibility gene for chronic obstructive pulmonary disease, the physiologic role of this protease inhibitor in lung development and homeostasis is unknown. We observed spontaneous monocytic-cell infiltration in the lungs of Serpine2-deficient (SE2(-/-)) mice, beginning at or before the time of lung maturity, which resulted in lesions that resembled bronchus-associated lymphoid tissue (BALT). The initiation of lymphocyte accumulation in the lungs of SE2(-/-) mice involved the excessive expression of chemokines, cytokines, and adhesion molecules that are essential for BALT induction, organization, and maintenance. BALT-like lesion formation in the lungs of SE2(-/-) mice was also associated with a significant increase in the activation of thrombin, a recognized target of SE2, and excess stimulation of NF-κB, a major regulator of chemokine expression and inflammation. Finally, systemic delivery of thrombin rapidly stimulated lung chemokine expression in vivo These data uncover a novel mechanism whereby loss of serine protease inhibition leads to lung lymphocyte accumulation.-Solleti, S. K., Srisuma, S., Bhattacharya, S., Rangel-Moreno, J., Bijli, K. M., Randall, T. D., Rahman, A., Mariani, T. J. Serpine2 deficiency results in lung lymphocyte accumulation and bronchus-associated lymphoid tissue formation.
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Affiliation(s)
- Siva Kumar Solleti
- Division of Neonatology, Department of Pediatrics, University of Rochester Medical Center, Rochester, New York, USA
| | - Sorachai Srisuma
- Department of Physiology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Soumyaroop Bhattacharya
- Division of Neonatology, Department of Pediatrics, University of Rochester Medical Center, Rochester, New York, USA
| | - Javier Rangel-Moreno
- Division of Allergy, Immunology, and Rheumatology, University of Rochester Medical Center, Rochester, New York, USA
| | - Kaiser M Bijli
- Division of Neonatology, Department of Pediatrics, University of Rochester Medical Center, Rochester, New York, USA; Division of Pulmonary, Allergy, and Critical Care Medicine, Emory University/Atlanta Veterans Affairs Medical Center, Atlanta, Georgia, USA
| | - Troy D Randall
- Division of Allergy, Immunology, and Rheumatology, University of Rochester Medical Center, Rochester, New York, USA; Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Arshad Rahman
- Division of Neonatology, Department of Pediatrics, University of Rochester Medical Center, Rochester, New York, USA
| | - Thomas J Mariani
- Division of Neonatology, Department of Pediatrics, University of Rochester Medical Center, Rochester, New York, USA;
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8
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Lee JY, Yoo SS, Kang HG, Jin G, Bae EY, Choi YY, Choi JE, Jeon HS, Lee J, Lee SY, Cha SI, Kim CH, Park JY. A functional polymorphism in the CHRNA3 gene and risk of chronic obstructive pulmonary disease in a Korean population. J Korean Med Sci 2012; 27:1536-40. [PMID: 23255854 PMCID: PMC3524434 DOI: 10.3346/jkms.2012.27.12.1536] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 10/24/2012] [Indexed: 11/30/2022] Open
Abstract
A genome-wide association study has identified the 15q25 region as being associated with the risk of chronic obstructive pulmonary disease (COPD) in Caucasians. This study intended as a confirmatory assessment of this association in a Korean population. The rs6495309C > T polymorphism in the promoter of nicotinic acetylcholine receptor alpha subunit 3 (CHRNA3) gene was investigated in a case-control study that consisted of 406 patients with COPD and 394 healthy control subjects. The rs6495309 CT or TT genotype was associated with a significantly decreased risk of COPD when compared to the rs6495309 CC genotype (adjusted odds ratio = 0.69, 95% confidence interval = 0.50-0.95, P = 0.023). The effect of the rs6495309C > T on the risk of COPD was more evident in moderate to very severe COPD than in mild COPD under a dominant model for the variant T allele (P = 0.024 for homogeneity). The CHRNA3 rs6495309C > T polymorphism on chromosome 15q25 is associated with the risk of COPD in a Korean population.
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Affiliation(s)
- Jae Yeon Lee
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Seung Soo Yoo
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Hyo-Gyoung Kang
- Department of Biochemistry and Cell Biology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Guang Jin
- Department of Biochemistry and Cell Biology, Kyungpook National University School of Medicine, Daegu, Korea
- Cancer Research Center, Yanbian University School of Basic Science, Yanji, Jilin, China
| | - Eun Young Bae
- Department of Biochemistry and Cell Biology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Yi Young Choi
- Department of Biochemistry and Cell Biology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Jin Eun Choi
- Department of Biochemistry and Cell Biology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Hyo-Sung Jeon
- Department of Biochemistry and Cell Biology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Jaehee Lee
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Shin Yup Lee
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Seung-Ick Cha
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Chang Ho Kim
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - Jae Yong Park
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea
- Department of Biochemistry and Cell Biology, Kyungpook National University School of Medicine, Daegu, Korea
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Abstract
A genetic contribution to develop chronic obstructive pulmonary disease (COPD) is well established. However, the specific genes responsible for enhanced risk or host differences in susceptibility to smoke exposure remain poorly understood. The goal of this review is to provide a comprehensive literature overview on the genetics of COPD, highlight the most promising findings during the last few years, and ultimately provide an updated COPD gene list. Candidate gene studies on COPD and related phenotypes indexed in PubMed before January 5, 2012 are tabulated. An exhaustive list of publications for any given gene was looked for. This well-documented COPD candidate-gene list is expected to serve many purposes for future replication studies and meta-analyses as well as for reanalyzing collected genomic data in the field. In addition, this review summarizes recent genetic loci identified by genome-wide association studies on COPD, lung function, and related complications. Assembling resources, integrative genomic approaches, and large sample sizes of well-phenotyped subjects is part of the path forward to elucidate the genetic basis of this debilitating disease.
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Affiliation(s)
- Yohan Bossé
- Centre de recherche Institut universitaire de cardiologie et de pneumologie de Québec, Quebec, Canada.
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Kukkonen MK, Tiili E, Hämäläinen S, Vehmas T, Oksa P, Piirilä P, Hirvonen A. SERPINE2 haplotype as a risk factor for panlobular type of emphysema. BMC MEDICAL GENETICS 2011; 12:157. [PMID: 22145704 PMCID: PMC3269992 DOI: 10.1186/1471-2350-12-157] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 12/07/2011] [Indexed: 12/02/2022]
Abstract
Background SERPINE2 (serpin peptidase inhibitor, clade E, member 2) has previously been identified as a positional candidate gene for chronic obstructive pulmonary disease (COPD) and has subsequently been associated to COPD and emphysema in several populations. We aimed to further examine the role of SERPINE2 polymorphisms in the development of pulmonary emphysema and different emphysema subtypes. Methods Four single nucleotide polymorphisms (SNPs) in SERPINE2 were analyzed from 951 clinically and radiologically examined Finnish construction workers. The genotype and haplotype data was compared to different emphysematous signs confirmed with high-resolution computed tomography (HRCT), forced vital capacity (FVC), forced expiratory volume in one second (FEV1), diffusing capacity (DLCO), and specific diffusing capacity (DLCO/VA). Results Three of the studied SERPINE2 SNPs (rs729631, rs975278, and rs6748795) were found to be in tight linkage disequilibrium. Therefore, only one of these SNPs (rs729631) was included in the subsequent analyses, in addition to the rs840088 SNP which was in moderate linkage with the other three studied SNPs. The rs729631 SNP showed a significant association with panlobular emphysema (p = 0.003). In further analysis, the variant allele of the rs729631 SNP was found to pose over two-fold risk (OR 2.22, 95% CI 1.05-4.72) for overall panlobular changes and over four-fold risk (OR 4.37, 95% CI 1.61-11.86) for pathological panlobular changes. A haplotype consisting of variant alleles of both rs729631 and rs840088 SNPs was found to pose an almost four-fold risk for overall panlobular (OR 3.72, 95% CI 1.56-8.90) and subnormal (OR 3.98, 95% CI 1.55-10.20) emphysema. Conclusions Our results support the previously found association between SERPINE2 polymorphisms and pulmonary emphysema. As a novel finding, our study suggests that the SERPINE2 gene may in particular be involved in the development of panlobular changes, i.e., the same type of changes that are involved in alpha-1-antitrypsin (AAT) -deficiency.
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