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Feng HH, Mao L, Pan K, Zhang L, Rui DS. Association between F+1 polymorphism in a disintegrin and metalloprotease 33 (ADAM33) gene and chronic obstructive pulmonary disease susceptibility: An evidence-based meta-analysis. Gene X 2019; 719:144009. [PMID: 31357020 DOI: 10.1016/j.gene.2019.144009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/24/2019] [Accepted: 07/24/2019] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND The F+1 (rs511898 G>A) polymorphism in a disintegrin and metalloprotease 33 (ADAM33) gene has been implicated in susceptibility of chronic obstruction pulmonary disease (COPD). However, a series of studies have reported inconclusive. The aim of this study is to explore the association between the F+1 (rs511898) of ADAM33 gene and COPD susceptibility by using the method of meta-analysis. METHOD PubMed, Embase, Cochrane Library, Chinese National Knowledge Infrastructure database (CNKI), Chongqing VIP database, Wanfang and China Biology Medicine (CBM) were searched comprehensively to obtain the related cohort studies and case-control studies. The included studies were selected according to inclusion criteria. The pooled odds ratios were performed respectively for allele comparison, additive model, dominant genetic model and recessive genetic model. The association between the F+1 polymorphism of ADAM33 gene and COPD susceptibility was measured by OR and 95%CI by STATA 12.0. The subgroup analysis was distinguished according to the ethnicity. The publication bias was tested by funnel plots and Egger's linear regression method. RESULTS Twelve case-control studies were included in the meta-analysis, which study is comprised of 6935 participants (2454 patients with COPD and 4481 controls). The meta results showed significant association between ADAM33 F+1 polymorphism and COPD susceptibility in allele model OR total = 1.16(95% CI 1.04-1.30, P = 0.007), OR Asian = 1.14(95% CI 1.02-1.27, P = 0.022), additive model OR total = 1.27 (95% CI 1.13-1.43, P = 0.000), OR Asian = 1.25 (95% CI 1.08-1.45, P = 0.003), recessive model OR total = 1.49 (95% CI 1.16-1.91, P = 0.002), OR Asian = 1.56(95% CI 1.09-2.22, P = 0.014), but not significant in Caucasians. CONCLUSION The ADAM33 F+1 mutant gene A may increase the risk of COPD among the Asian population, while it may not associate with the European population.
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Affiliation(s)
- Hong-Hong Feng
- Department of Public Health, Shihezi University School of Medicine, Shihezi, China
| | - Lu Mao
- Department of Public Health, Shihezi University School of Medicine, Shihezi, China
| | - Kai Pan
- Xinjiang Uighur Autonomous Region Center for Disease Control and Prevention, Wulumuqi, China
| | - Ling Zhang
- Xinjiang Uighur Autonomous Region Center for Disease Control and Prevention, Wulumuqi, China
| | - Dong-Sheng Rui
- Department of Public Health, Shihezi University School of Medicine, Shihezi, China.
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2
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Fang L, Wu J, Huang T, Zhang P, Xin X, Shi Y. TGF-β1 stimulates epithelial-mesenchymal transition mediated by ADAM33. Exp Ther Med 2017; 15:985-992. [PMID: 29399106 DOI: 10.3892/etm.2017.5478] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 08/17/2017] [Indexed: 12/12/2022] Open
Abstract
The present study aimed to determine the effects of transforming growth factor (TGF)-β1 on disintegrin and metalloproteinase domain-containing protein 33 (ADAM33) expression in airway epithelial cells in order to investigate the association between ADAM33 expression and TGF-β1-induced epithelial to mesenchymal transition (EMT), and to further explore the mechanisms underlying the role of ADAM33 in airway remodeling in asthma. The human bronchial epithelial cell line HBE was transfected with small interfering RNA targeting ADAM33 (siADAM33) and treated with different concentrations of TGF-β1 (10, 20 or 30 ng/ml), while untransfected cells were used as controls. At 72 h after treatment, cellular morphology and immunohistochemical staining were observed under a microscope. The protein and mRNA expression levels of ADAM33 and the EMT markers E-cadherin and vimentin were detected by western blot analysis and reverse-transcription quantitative polymerase chain reaction, respectively. In addition, a correlation analysis of ADAM33 expression and E-cadherin/vimentin expression was performed. A wound healing migration assay and a cell invasion assay were also performed. The results of the cellular morphology, migration and invasion studies suggested that TGF-β1 treatment induced typical EMT changes in HBE cells. In addition, treatment with various concentrations of TGF-β1 significantly increased the protein and mRNA expression levels of ADAM33 and vimentin compared with those in untreated cells. TGF-β1 treatment also decreased the protein and mRNA expression levels of E-cadherin in a dose-dependent manner. By contrast, transfection with siADAM33 promoted the protein expression of E-cadherin and decreased the protein expression of vimentin. Furthermore, ADAM33 and E-cadherin expression levels exhibited a significant negative correlation, whereas ADAM33 and vimentin were positively correlated. In conclusion, the results suggested that TGF-β1 enhances ADAM33 expression in airway epithelial cells, and that ADAM33 induces the EMT of airway epithelial cells, thus participating in airway remodeling in asthma.
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Affiliation(s)
- Liping Fang
- Department of Respiratory Medicine, Jinling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Jie Wu
- Cadre Department of Respiratory Medicine, Jinling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Tao Huang
- Department of Orthopedics, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, P.R. China
| | - Pengpeng Zhang
- Department of Respiratory Medicine, Jinling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Xiaofeng Xin
- Cadre Department of Respiratory Medicine, Jinling Hospital, Nanjing, Jiangsu 210002, P.R. China
| | - Yi Shi
- Department of Respiratory Medicine, Jinling Hospital, Nanjing, Jiangsu 210002, P.R. China
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Yuan C, Chang D, Lu G, Deng X. Genetic polymorphism and chronic obstructive pulmonary disease. Int J Chron Obstruct Pulmon Dis 2017; 12:1385-1393. [PMID: 28546746 PMCID: PMC5436778 DOI: 10.2147/copd.s134161] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a common chronic disease, and its morbidity and mortality are increasing. There are many studies that have tried to explain the pathogenesis of COPD from genetic susceptibility, to identify the susceptibility of COPD factors, which play a role in early prevention, early detection and the early treatment. However, it is well known that COPD is an inflammatory disease characterized by incomplete reversible airflow limitation in which genes interact with the environment. In recent years, many studies have proved gene polymorphisms and COPD correlation. However, there is less research on the relationship between COPD and genome-wide association study (GWAS), epigenetics and apoptosis. In this paper, we summarized the correlation between gene level and COPD from the following four aspects: the GWAS, the gene polymorphism, the epigenetics and the apoptosis, and the relationship between COPD and gene is summarized comprehensively.
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Affiliation(s)
| | - De Chang
- Department of Respiratory Medicine, General Hospital of Chinese People's Armed Police Forces
| | - Guangming Lu
- Institute of Health Management, Chinese PLA General Hospital, Beijing, People's Republic of China
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Crotty Alexander LE, Shin S, Hwang JH. Inflammatory Diseases of the Lung Induced by Conventional Cigarette Smoke: A Review. Chest 2016; 148:1307-1322. [PMID: 26135024 DOI: 10.1378/chest.15-0409] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Smoking-induced lung diseases were extremely rare prior to the 20th century. With commercialization and introduction of machine-made cigarettes, worldwide use skyrocketed and several new pulmonary diseases have been recognized. The majority of pulmonary diseases caused by cigarette smoke (CS) are inflammatory in origin. Airway epithelial cells and alveolar macrophages have altered inflammatory signaling in response to CS, which leads to recruitment of lymphocytes, eosinophils, neutrophils, and mast cells to the lungs-depending on the signaling pathway (nuclear factor-κB, adenosine monophosphate-activated protein kinase, c-Jun N-terminal kinase, p38, and signal transducer and activator of transcription 3) activated. Multiple proteins are upregulated and secreted in response to CS exposure, and many of these have immunomodulatory activities that contribute to disease pathogenesis. In particular, metalloproteases 9 and 12, surfactant protein D, antimicrobial peptides (LL-37 and human β defensin 2), and IL-1, IL-6, IL-8, and IL-17 have been found in higher quantities in the lungs of smokers with ongoing inflammation. However, many underlying mechanisms of smoking-induced inflammatory diseases are not yet known. We review here the known cellular and molecular mechanisms of CS-induced diseases, including COPD, respiratory bronchiolitis-interstitial lung disease, desquamative interstitial pneumonia, acute eosinophilic pneumonia, chronic rhinosinusitis, pulmonary Langerhans cell histiocytosis, and chronic bacterial infections. We also discuss inflammation induced by secondhand and thirdhand smoke exposure and the pulmonary diseases that result. New targeted antiinflammatory therapeutic options are currently under investigation and hopefully will yield promising results for the treatment of these highly prevalent smoking-induced diseases.
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Affiliation(s)
- Laura E Crotty Alexander
- Veterans Affairs San Diego Healthcare System; and University of California, San Diego, La Jolla, CA..
| | - Stephanie Shin
- Veterans Affairs San Diego Healthcare System; and University of California, San Diego, La Jolla, CA
| | - John H Hwang
- Veterans Affairs San Diego Healthcare System; and University of California, San Diego, La Jolla, CA
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Kim JY, Kim Y, Chae SC, Lee SS, Lim MK, Sheen DH, Chung HT, Shim SC. ADAM33Polymorphisms Are Associated with Susceptibility to Systemic Lupus Erythematosus in a Korean Population. JOURNAL OF RHEUMATIC DISEASES 2016. [DOI: 10.4078/jrd.2016.23.2.88] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Ji-Young Kim
- Division of Rheumatology, Department of Medicine, Daejeon Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Daejeon, Korea
| | - Young Kim
- Division of Rheumatology, Department of Medicine, Daejeon Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Daejeon, Korea
| | - Soo-Cheon Chae
- Department of Pathology, Wonkwang University School of Medicine, Iksan, Korea
| | - Shin-Seok Lee
- Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Mi-Kyoung Lim
- Department of Medicine, Eulji Medi-Bio Research Institute, Eulji University, Daejeon, Korea
| | - Dong-Huyk Sheen
- Department of Medicine, Eulji Medi-Bio Research Institute, Eulji University, Daejeon, Korea
| | - Hun-Taeg Chung
- School of Biological Sciences, University of Ulsan, Ulsan, Korea
| | - Seung-Cheol Shim
- Division of Rheumatology, Department of Medicine, Daejeon Rheumatoid and Degenerative Arthritis Center, Chungnam National University Hospital, Daejeon, Korea
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Shah S, Rashid A, Shah ZA, Jan RA, Khan UH, Bhat IA, Mantoo S, Shah TH, Koul PA. A disintegrin and metalloprotease 33 polymorphism association with COPD in long-term tobacco smokers of the ethnic Kashmiri population of India. Lung India 2015; 32:220-4. [PMID: 25983406 PMCID: PMC4429382 DOI: 10.4103/0970-2113.156222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background: Chronic obstructive pulmonary disease (COPD) is characterized by an interaction of various environmental influences especially cigarette smoking and genetic determinants. The prevalence of this disease is ever increasing and characterization of the genetic determinants of the disease has been undertaken globally. The ‘A disintegrin and metalloprotease 33’ (ADAM 33) gene is one candidate gene that has been studied. Objective: Our objective was to investigate whether single nucleotide polymorphisms in ADAM33 gene are associated with COPD in long-term tobacco smokers in the ethnic Kashmiri population of northern India. Materials and Methods: This was a randomized case-control study, which included 78 stable COPD (GOLD stage11-IV) patients, who were compared with 77 age- and sex-matched long-term tobacco smokers (>20 pack years) without any evidence of COPD. Polymorphic analysis for three single nucleotide polymorphisms (SNPs), (T1, T2, and Q1) of the ADAM33 gene was done by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) followed by sequencing. The data were analyzed by descriptive statistics and comparative evaluation was done by parametric/non-parametric tests. Results: The analysis of the T1, T2, and Q1 SNPs, revealed that the frequencies of the T2GG, T1GG, and the Q1AG genotypes were significantly higher in patients with COPD in comparison with the controls (P < 0.001). Similarly, the T1G and T2G allele frequency was higher in the patients than in the controls (p = 0.177 and 0.43, respectively). Conclusion: Three SNPs of the ADAM33 gene were significantly associated with COPD in the Kashmiri population of India. This study establishes the possible role of ADAM33 SNPS in the causation of COPD. Further studies across different geographical areas in the country will unravel the contribution of this gene in the causation of COPD in India.
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Affiliation(s)
- Sonaullah Shah
- Department of Internal and Pulmonary Medicine, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Amir Rashid
- Department of Internal and Pulmonary Medicine, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Zaffar A Shah
- Department of Immunology, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Rafi Ahmad Jan
- Department of Internal and Pulmonary Medicine, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Umar Hafiz Khan
- Department of Internal and Pulmonary Medicine, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Imtiyaz A Bhat
- Department of Immunology, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Suhail Mantoo
- Department of Internal and Pulmonary Medicine, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Tajamul H Shah
- Department of Internal and Pulmonary Medicine, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Parvaiz A Koul
- Department of Internal and Pulmonary Medicine, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
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Zhou DC, Zhou CF, Toloo S, Shen T, Tong SL, Zhu QX. Association of a disintegrin and metalloprotease 33 (ADAM33) gene polymorphisms with the risk of COPD: an updated meta-analysis of 2,644 cases and 4,804 controls. Mol Biol Rep 2014; 42:409-22. [DOI: 10.1007/s11033-014-3782-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Accepted: 09/27/2014] [Indexed: 12/26/2022]
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Zhang R, Li H, Zhao H, Chen W, Cheng D. Polymorphisms in a disintegrin and metalloprotease 33 gene and the risk of chronic obstructive pulmonary disease: A meta-analysis. Respirology 2014; 19:312-20. [PMID: 24422987 DOI: 10.1111/resp.12235] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 08/06/2013] [Accepted: 10/31/2013] [Indexed: 02/05/2023]
Affiliation(s)
- Rui Zhang
- Department of Respiratory Medicine; West China Hospital; Sichuan University; Chengdu China
| | - He Li
- Department of Respiratory Medicine; West China Hospital; Sichuan University; Chengdu China
| | - Haiming Zhao
- Department of Respiratory Medicine; West China Hospital; Sichuan University; Chengdu China
| | - Wangyue Chen
- Department of Respiratory Medicine; West China Hospital; Sichuan University; Chengdu China
| | - Deyun Cheng
- Department of Respiratory Medicine; West China Hospital; Sichuan University; Chengdu China
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9
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Wu X, Yuan B, López E, Bai C, Wang X. Gene polymorphisms and chronic obstructive pulmonary disease. J Cell Mol Med 2013; 18:15-26. [PMID: 24256364 PMCID: PMC3916114 DOI: 10.1111/jcmm.12159] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2013] [Accepted: 09/09/2013] [Indexed: 02/06/2023] Open
Abstract
The genetic component was suggested to contribute to the development of chronic obstructive pulmonary disease (COPD), a major and growing public health burden. The present review aims to characterize the evidence that gene polymorphisms contribute to the aetiology of COPD and related traits, and explore the potential relationship between certain gene polymorphisms and COPD susceptibility, severity, lung function, phenotypes, or drug effects, even though limited results from related studies lacked consistency. Most of these studies were association studies, rather than confirmatory studies. More large-sized and strictly controlled studies are needed to prove the relationship between gene polymorphisms and the reviewed traits. More importantly, prospective confirmatory studies beyond initial association studies will be necessary to evaluate true relationships between gene polymorphisms and COPD and help individualized treatment for patients with COPD.
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Affiliation(s)
- Xiaodan Wu
- Department of Respiratory Medicine, Zhongshan Hospital, Fudan University, Shanghai, China; Shanghai Respiratory Research Institute, Shanghai, China
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10
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Aierken H, Wang J, Wushouer Q, Shayhidin E, Hu X, Syed I, Wufuer D. Polymorphisms of the ADAM33 gene and chronic obstructive pulmonary disease risk: a meta-analysis. CLINICAL RESPIRATORY JOURNAL 2013; 8:108-15. [PMID: 23902466 DOI: 10.1111/crj.12046] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 04/25/2013] [Accepted: 07/25/2013] [Indexed: 12/22/2022]
Abstract
BACKGROUND The T1 (rs2280091), S1 (rs3918396) and S2 (rs528557) polymorphisms in a disintegrin and metalloprotease (ADAM33) gene has been implicated in susceptibility of chronic obstructive pulmonary disease (COPD). But, a number of studies have reported inconclusive results. The aim of this study is to investigate the relationship between T1 (rs2280091), S1 (rs3918396) and S2 (rs528557) polymorphisms in ADAM33 gene and COPD risk by meta-analysis. METHODS We searched PubMed database, Embase database, Chinese National Knowledge Infrastructure database and Wanfang database, covering all studies till September 5, 2012. Statistical analysis was performed using software METAGEN (STATA 12.0) and Revman5.0. RESULTS A total of 2139 COPD cases and 3765 controls in 10 case-control studies were included in this study. The results showed that S2 (rs528557) and T1 (rs2280091) polymorphisms did not result in an increased or a decreased risk of COPD. The analysis described in this report demonstrated that S1 (rs3918396) polymorphism (GG + AG vs AA) was significantly associated with the total and Asian. Odds ratio (OR)total = 1.27 [95% confidence interval (CI) 1.03-1.56, P = 0.03], ORAsian = 1.44 (95% CI 1.13-1.83, P = 0.003) but not with Caucasians. CONCLUSIONS This meta-analysis suggested that S1 (rs3918396) polymorphism of ADAM33 is associated with increased risk of COPD in Asian (China) but not in Caucasians. Future studies are needed to validate our conclusions.
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Affiliation(s)
- Haidiya Aierken
- Department of Respiratory Medicine, First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
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Tan J, Liu AP, Sun C, Bai YF, Lv F. Association of ADAM33 gene polymorphisms with COPD in the Mongolian population of China. Ann Hum Biol 2013; 41:9-14. [PMID: 24191661 DOI: 10.3109/03014460.2013.821165] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) is a respiratory disorder with increasing prevalence and mortality, influenced by both environmental and genetic factors. ADAM33 gene has been found to be associated with asthma, declined lung function and COPD. AIM The aim of this study was to find out if SNPs in ADAM33 (V4, T+1, T1, T2, S1, S2, Q-1 and F+1) play any role in genetic susceptibility to COPD in the Mongolian population of China. SUBJECTS AND METHODS Two hundred and fifteen Mongolian COPD patients and 223 Mongolian healthy individuals were recruited for the study. Eight polymorphic loci (V4, T+1, T2, T1, S2, S1, Q-1, and F+1) of ADAM33 were selected for genotyping. Genotyping was carried out using the Polymerase Chain Reaction and Restriction Fragment Length polymorphism (PCR-RFLP) method. RESULTS Seven SNPs in ADAM33 were associated with COPD (T+1, p = 0.014; T2, p = 0.018; T1, p = 0.048; S2, p = 0.003; S1, p = 0.000; Q-1, p = 0.000 and F+1, p = 0.000), even after Bonferroni correction, SNPs S2, S1, Q-1 and F+1 remained significant. Haplotype analysis showed that the frequencies of haplotype H1 (GGAGGGT), H5 (GGAGGGC) and H10 (GGGGAGT) were significantly higher in the COPD group than in the control group (p = 0.002, 0.031 and 0.009, respectively). In contrast, the haplotype H11 (GGACAGC) was more common in the control group than in the case group (p = 0.015). CONCLUSIONS Seven SNPs in ADAM33 were associated with COPD in the Mongolian population of China.
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Affiliation(s)
- Jie Tan
- Department of Respiratory, The Second Affiliated Hospital of Harbin Medical University , Harbin 150081 , PR China
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12
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Yang Y, Wicks J, Haitchi HM, Powell RM, Manuyakorn W, Howarth PH, Holgate ST, Davies DE. Regulation of a disintegrin and metalloprotease-33 expression by transforming growth factor-β. Am J Respir Cell Mol Biol 2012; 46:633-40. [PMID: 22227561 PMCID: PMC3359905 DOI: 10.1165/rcmb.2011-0030oc] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Accepted: 12/21/2011] [Indexed: 11/24/2022] Open
Abstract
The asthma susceptibility gene, a disintegrin and metalloprotease-33 (ADAM33), is selectively expressed in mesenchymal cells, and the activity of soluble ADAM33 has been linked to angiogenesis and airway remodeling. Transforming growth factor (TGF)-β is a profibrogenic growth factor, the expression of which is increased in asthma, and recent studies show that it enhances shedding of soluble ADAM33. In this study, we hypothesized that TGF-β also affects ADAM33 expression in bronchial fibroblasts in asthma. Primary fibroblasts were grown from bronchial biopsies from donors with and those without asthma, and treated with TGF-β(2) to induce myofibroblast differentiation. ADAM33 expression was assessed using quantitative RT-PCR and Western blotting. To examine the mechanisms whereby TGF-β(2) affected ADAM33 expression, quantitative methylation-sensitive PCR, chromatin immunoprecipitation, and nuclear accessibility assays were conducted on the ADAM33 promoter. We found that TGF-β(2) caused a time- and concentration-dependent reduction in ADAM33 mRNA expression in normal and asthmatic fibroblasts, affecting levels of splice variants similarly. TGF-β(2) also induced ADAM33 protein turnover and appearance of a cell-associated C-terminal fragment. TGF-β(2) down-regulated ADAM33 mRNA expression by causing chromatin condensation around the ADAM33 promoter with deacetylation of histone H3, demethylation of H3 on lysine-4, and hypermethylation of H3 on lysine-9. However, the methylation status of the ADAM33 promoter did not change. Together, these data suggest that TGF-β(2) suppresses expression of ADAM33 mRNA in normal or asthmatic fibroblasts. This occurs by altering chromatin structure, rather than by gene silencing through DNA methylation as in epithelial cells. This may provide a mechanism for fine regulation of levels of ADAM33 expression in fibroblasts, and may self-limit TGF-β(2)-induced ectodomain shedding of ADAM33.
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Affiliation(s)
- Youwen Yang
- Southampton General Hospital, Southampton, UK
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An L, Yang T, Zhang Y, Lin Y, Zhang H, Jiao X, Hua L, Dai H, Wang C. Association of SERPINE2 gene with the risk of chronic obstructive pulmonary disease and spirometric phenotypes in northern Han Chinese population. Mol Biol Rep 2011; 39:1427-33. [PMID: 21611750 DOI: 10.1007/s11033-011-0877-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Accepted: 05/14/2011] [Indexed: 12/23/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a complex human disease influenced by multiple genes and environmental factors. The SERPINE2 gene has recently been demonstrated to be associated with COPD onset in a non-East Asian population. In this study, we genotyped 20 single nucleotide polymorphisms (SNPs) in SERPINE2 from 310 cases and 203 controls, all of which belong to the Han from North China. Genotype frequencies were compared between the cases and the controls and analyzed for statistical significance. Two SNPs (rs729631 and rs975278), which are in strong linkage disequilibrium (LD) and locate in block 1 on the LD map of our samples, showed significant association both with the risk of COPD and decline in baseline lung function after Bonferroni correction (P < 0.05). This study provides further evidences for SERPINE2 gene as a COPD susceptible gene, and block 1 of SERPINE2 appears to be the genetic variant region that affects the Han Chinese.
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Affiliation(s)
- Li An
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Beijing Institute of Respiratory Medicine, Department of Respiratory and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, No 8, Gongren Tiyuchang Nanlu, Chao-yang District, Beijing 100020, China
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