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Shen Y, Huang Q, Ji M, Hsueh CY, Zhou L. Smoking-mediated nicotinic acetylcholine receptors (nAChRs) for predicting outcomes for head and neck squamous cell carcinomas. BMC Cancer 2022; 22:1093. [PMID: 36284268 PMCID: PMC9594873 DOI: 10.1186/s12885-022-10161-x] [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] [Received: 07/14/2022] [Accepted: 09/30/2022] [Indexed: 11/10/2022] Open
Abstract
Background As a human tumor disease, head and neck squamous cell carcinoma (HNSCC) is associated with a high mortality rate worldwide. Nicotinic acetylcholine receptors (nAChRs) are transmembrane receptor proteins and exert their biological effects following activation by nicotine. We aimed to construct a prognostic signature based on the expression of nAChRs among smokers with HNSCC. Methods The transcriptome profile of nAChRs was obtained from The Cancer Genome Atlas (TCGA). Following the integration of survival information, univariate Cox regression and least absolute shrinkage and selection operator (LASSO) analyses were performed to screen the prognosis-related nAChRs and construct a prognostic signature. Kaplan–Meier (KM), receiver operating characteristic (ROC), principal component analysis (PCA), and independent prognostic analysis were utilized to verify the predictive power of the nAChR-associated prognostic signature. The expression of α5 nAChR in clinical samples was verified by quantitative reverse transcriptase PCR. Results Subunits α2, α5, α9, and β4 were related to the prognosis. The prognostic signature comprised the expression of subunits α5, α9, and β4. The nAChR-associated signature showed high sensitivity and specificity for prognostic prediction and was an independent factor for overall survival. Based on the clinical variables and expression of nAChRs, a nomogram was constructed for predicting the outcomes of HNSCC patients who were smokers in the clinical settings. In clinical specimens, α5 nAChR showed high expression in HNSCC tissues, especially among smokers. Conclusions The nAChR-associated signature constructed in this study may provide a better system for the classification of HNSCC patients and facilitate personalized treatment according to their smoking habits. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-10161-x.
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Affiliation(s)
- Yujie Shen
- Department of Otorhinolaryngology Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Fudan University, Shanghai, China
| | - Qiang Huang
- Department of Otorhinolaryngology Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Fudan University, Shanghai, China
| | - Mengyou Ji
- Department of Otorhinolaryngology Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Fudan University, Shanghai, China
| | - Chi-Yao Hsueh
- Department of Otorhinolaryngology Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Fudan University, Shanghai, China.
| | - Liang Zhou
- Department of Otorhinolaryngology Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital, Fudan University, Shanghai, China.
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2
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Sammad A, Zhang H, Shi R, Dong Y, Luo H, Chen Z, Liu L, Guo G, Liu A, Wang Y. A Post-GWAS Functional Analysis Confirming Effects of Three BTA13 Genes CACNB2, SLC39A12, and ZEB1 on Dairy Cattle Reproduction. Front Genet 2022; 13:882951. [PMID: 35754833 PMCID: PMC9216173 DOI: 10.3389/fgene.2022.882951] [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] [Received: 02/24/2022] [Accepted: 05/18/2022] [Indexed: 11/26/2022] Open
Abstract
In our previous GWAS of Chinese and Nordic dairy cattle, genes CACNB2, SLC39A12, and ZEB1 locating on BTA 13 were suggested as candidate genes for reproduction. In this study, validation of these associations was performed in an independent population with records of nine reproductive traits. More importantly, functions of these genes in the reproductive process were verified by employing the expression data of ovarian follicles. The potential variants within the three genes were firstly detected in 68 Chinese Holstein bulls, and then screened in 1,588 Chinese Holstein cows using the KASP (Kompetitive allele-specific PCR) method. There were nine variants with polymorphisms in CACNB2, five in SLC39A12, and four in ZEB1, respectively, of which one SNP was in the upstream regulatory region, two in exon region, four in downstream regulatory region, and 11 SNPs in intronic regions. Amongst the 18 variants, g.33267056T/G in CACNB2 explained the largest phenotypic variance for age at first calving (0.011%), interval from first to last insemination (0.004%), and calving ease (0.002%), while g.32751518G/A in SLC39A12 contributed the most to stillbirth in heifers (0.038%). Two haplotype blocks were constructed for CACNB2 while one each for SLC39A12 and ZEB1, which were significantly associated with five reproductive traits, including age at the first service, age at the first calving, calving ease in heifers and cows, and the interval from calving to the first insemination. We then studied the profile of gene expression in granulosa cells isolated from four developmental stages of ovarian follicles from eight dairy cows. All three genes were differentially expressed between ovarian follicles with different sizes (p < 0.05), indicating their potential roles in the reproductive process of dairy cows. This study successfully demonstrated the associations of three BTA 13 genes CACNB2, SLC39A12, and ZEB1 with reproduction and further examined their expression levels in ovarian follicles directly. These findings can be beneficial for the ongoing genomic selection program for reproductive traits which have long been considered as traits that are difficult to achieve genetic improvement due to the lack of efficient genetic markers.
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Affiliation(s)
- Abdul Sammad
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Hailiang Zhang
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Rui Shi
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yixin Dong
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Hanpeng Luo
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Ziwei Chen
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Lin Liu
- Beijing Dairy Cattle Center, Beijing, China
| | - Gang Guo
- Beijing Sunlon Livestock Development Co. Ltd., Beijing, China
| | - Aoxing Liu
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China.,Center for Quantitative Genetics and Genomics, Aarhus University, Aarhus, Denmark
| | - Yachun Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Pérez‐Morales R, González‐Zamora A, González‐Delgado MF, Calleros Rincón EY, Olivas Calderón EH, Martínez‐Ramírez OC, Rubio J. CHRNA3
rs1051730 and
CHRNA5
rs16969968 polymorphisms are associated with heavy smoking, lung cancer, and chronic obstructive pulmonary disease in a mexican population. Ann Hum Genet 2018; 82:415-424. [DOI: 10.1111/ahg.12264] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 06/01/2018] [Accepted: 06/05/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Rebeca Pérez‐Morales
- Laboratorio de Biología Celulary Molecular Facultad de Ciencias Químicas, Universidad Juárez del Estado de Durango Durango México
| | - Alberto González‐Zamora
- Laboratorio de Biología Evolutiva. Facultad de Ciencias Biológicas Universidad Juárez del Estado de Durango Durango México
| | - María Fernanda González‐Delgado
- Laboratorio de Biología Celulary Molecular Facultad de Ciencias Químicas, Universidad Juárez del Estado de Durango Durango México
| | - Esperanza Y. Calleros Rincón
- Laboratorio de Biología Celulary Molecular Facultad de Ciencias Químicas, Universidad Juárez del Estado de Durango Durango México
| | - Edgar H. Olivas Calderón
- Laboratorio de Biología Celulary Molecular Facultad de Ciencias Químicas, Universidad Juárez del Estado de Durango Durango México
| | | | - Julieta Rubio
- Departamento de Medicina Genómica y Toxicología Ambiental Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México Ciudad de México México
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4
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Zhang J, Peng S, Cheng H, Nomura Y, Di Narzo AF, Hao K. Genetic Pleiotropy between Nicotine Dependence and Respiratory Outcomes. Sci Rep 2017; 7:16907. [PMID: 29203782 PMCID: PMC5715160 DOI: 10.1038/s41598-017-16964-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 11/20/2017] [Indexed: 01/04/2023] Open
Abstract
Smoking is a major cause of respiratory conditions. To date, the genetic pleiotropy between smoking behavior and lung function/chronic obstructive pulmonary disease (COPD) have not been systematically explored. We leverage large data sets of smoking behavior, lung function and COPD, and addressed two questions, (1) whether the genetic predisposition of nicotine dependence influence COPD risk and lung function; and (2) the genetic pleiotropy follow causal or independent model. We found the genetic predisposition of nicotine dependence was associated with COPD risk, even after adjusting for smoking behavior, indicating genetic pleiotropy and independent model. Two known nicotine dependent loci (15q25.1 and 19q13.2) were associated with smoking adjusted lung function, and 15q25.1 reached genome-wide significance. At various suggestive p-value thresholds, the smoking adjusted lung function traits share association signals with cigarettes per day and former smoking, substantially greater than random chance. Empirical data showed the genetic pleiotropy between nicotine dependence and COPD or lung function. The basis of pleiotropic effect is rather complex, attributable to a large number of genetic variants, and many variants functions through independent model, where the pleiotropic variants directly affect lung function, not mediated by influencing subjects' smoking behavior.
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Affiliation(s)
- Jushan Zhang
- Department of Respiratory Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai 200072, China.,School of Life Sciences and Technology, Tongji University, Shanghai 200092, China
| | - Shouneng Peng
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.,Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Haoxiang Cheng
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.,Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Yoko Nomura
- Department of Psychology, Queens College & Graduate Center, the City University of New York, New York, NY 10016, USA.,Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Antonio Fabio Di Narzo
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Ke Hao
- Department of Respiratory Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai 200072, China. .,Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA. .,Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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5
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Zhao Z, Jiang C, Zhao D, Li Y, Liang C, Liu W, Wei S, Zhou Y, Zhao Z, Ran P. Two CHRN susceptibility variants for COPD are genetic determinants of emphysema and chest computed tomography manifestations in Chinese patients. Int J Chron Obstruct Pulmon Dis 2017; 12:1447-1455. [PMID: 28553097 PMCID: PMC5439970 DOI: 10.2147/copd.s134010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Quantitative computed tomography (CT) measures of emphysema have been shown to be associated with increased mortality in humans, but genetic variants affecting the quantitative parameters of chest CT that measure degree of emphysema have not yet been examined. In this study, using available chest CT data from a total of 344 emphysema patients, we assessed the correlations between five chronic obstructive pulmonary disease (COPD) susceptibility variants in the cholinergic receptor nicotinic (CHRN) genes and the degree of emphysema and chest CT manifestations. We verified that most of the parameters were significantly correlated with the degree of emphysema. Compared to rs76071148AA and TT genotype carriers, the rs76071148AT genotype carriers exhibited a decreased probability of having severe emphysema (odds ratio [OR] =0.63, 95% confidence interval [CI] =0.40–0.99), whereas the variant rs8040868C allele was negatively correlated with the emphysema index (P=0.002). Interestingly, further stratification analysis grouped by spirometry-diagnosed COPD status revealed that the variant rs8040868C (CT + CC) genotypes exerted a protective effect against severe emphysema with borderline significance (OR =0.41, 95% CI =0.16–1.05) and affected the mean lung density, emphysema index, ratio of airway wall thickness to airway dimensions (AWT/AD), and AWT grade in spirometry-diagnosed non-COPD subjects. The rs76071148 variant was also significantly associated with AWT/AD and AWT grade in those individuals. In summary, we determined that rs8040868 and rs76071148 are promising indicators of the degree of emphysema and chest CT manifestations, especially in spirometry-diagnosed non-COPD subjects.
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Affiliation(s)
- Zhuxiang Zhao
- The State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou.,The Pulmonary Medicine,Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Changbin Jiang
- The State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou
| | - Dongxing Zhao
- The State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou
| | - Yujun Li
- The Pulmonary Medicine,Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Chunxiao Liang
- The State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou
| | - Weifeng Liu
- The Pulmonary Medicine,Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Shuquan Wei
- The Pulmonary Medicine,Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Yumin Zhou
- The State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou
| | - Ziwen Zhao
- The Pulmonary Medicine,Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Pixin Ran
- The State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou
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6
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Qiu F, Li Y, Lu X, Xie C, Nong Q, Wu D, Chen J, Yang L, Zhou Y, Lu J. Rare variant ofMAP2K7is associated with increased risk of COPD in southern and eastern Chinese. Respirology 2017; 22:691-698. [DOI: 10.1111/resp.12976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 09/11/2016] [Accepted: 09/29/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Fuman Qiu
- Biomedicine Research Center of The Third Affiliated Hospital of GMU, The State Key Lab of Respiratory Disease, The Institute for Chemical Carcinogenesis, Collaborative Innovation Center for Environmental Toxicity; Guangzhou Medical University; Guangzhou China
| | - Yinyan Li
- Biomedicine Research Center of The Third Affiliated Hospital of GMU, The State Key Lab of Respiratory Disease, The Institute for Chemical Carcinogenesis, Collaborative Innovation Center for Environmental Toxicity; Guangzhou Medical University; Guangzhou China
| | - Xiaoxiao Lu
- School of Arts and Sciences; Colby-Sawyer College; New London New Hampshire USA
| | - Chenli Xie
- Biomedicine Research Center of The Third Affiliated Hospital of GMU, The State Key Lab of Respiratory Disease, The Institute for Chemical Carcinogenesis, Collaborative Innovation Center for Environmental Toxicity; Guangzhou Medical University; Guangzhou China
| | - Qingqing Nong
- Department of Environmental Health; Guangxi Medical University; Nanning China
| | - Di Wu
- Biomedicine Research Center of The Third Affiliated Hospital of GMU, The State Key Lab of Respiratory Disease, The Institute for Chemical Carcinogenesis, Collaborative Innovation Center for Environmental Toxicity; Guangzhou Medical University; Guangzhou China
| | - Jiansong Chen
- Biomedicine Research Center of The Third Affiliated Hospital of GMU, The State Key Lab of Respiratory Disease, The Institute for Chemical Carcinogenesis, Collaborative Innovation Center for Environmental Toxicity; Guangzhou Medical University; Guangzhou China
| | - Lei Yang
- Biomedicine Research Center of The Third Affiliated Hospital of GMU, The State Key Lab of Respiratory Disease, The Institute for Chemical Carcinogenesis, Collaborative Innovation Center for Environmental Toxicity; Guangzhou Medical University; Guangzhou China
| | - Yifeng Zhou
- Department of Genetics; Medical College of Soochow University; Suzhou China
| | - Jiachun Lu
- Biomedicine Research Center of The Third Affiliated Hospital of GMU, The State Key Lab of Respiratory Disease, The Institute for Chemical Carcinogenesis, Collaborative Innovation Center for Environmental Toxicity; Guangzhou Medical University; Guangzhou China
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7
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Zhao Z, Zhou Y, Li Y, Jiang C, Zhao D, Zhao Z, Liu Z, Ran P. An efficient method to genotype the polymorphisms of cholinergic nicotinic receptor subunit genes and their associations with COPD onset risk. Exp Lung Res 2016; 42:267-74. [PMID: 27462996 DOI: 10.1080/01902148.2016.1197346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND Single-nucleotide polymorphisms (SNPs) in the cholinergic nicotinic receptor subunit genes on chromosome 15q25.1, including CHRNA3, CHRNB4 and CHRNA5, are well-established biomarkers of chronic obstructive pulmonary disease (COPD) and lung cancer. Thus, there is great demand for a rapid, easy and inexpensive method to detect these variations for purpose of risk prediction in large populations. AIM OF THE STUDY The aim of this study was to establish an accurate and efficient method for genotyping CHRN SNPs and testing their association with age at onset of COPD in Chinese population as well as the clinical stage in COPD patients. MATERIALS AND METHODS We designed a method to specifically genotype 5 SNPs of CHRN genes based on a modified high-resolution melt (HRM) method and then validated the genotyping results by direct sequencing of 120 samples. We further used the HRM method to genotype these 5 SNPs in 1,013 COPD patients. RESULTS Requiring little time, few material costs and only a simplified protocol, the modified HRM method could accurately distinguish the genotypes of CHRN SNPs, demonstrating kappa coefficients >0.96 based on the results from direct sequencing. Furthermore, the data showed that the GG genotype of SNP rs56218866 was associated with a significantly earlier age of COPD onset than A (AA+AG) genotypes (61.0 ± 8.93 vs. 67.8 ± 9.88; P = 0.031), which was not found for the other SNPs. No significant association was observed between the COPD stages and any of the above SNPs. CONCLUSION A simple, rapid and efficient HRM method was introduced for CHRN SNP genotyping and a suggestion that the SNP rs56218866A>G is associated with early-onset COPD in a Chinese population was found.
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Affiliation(s)
- Zhuxiang Zhao
- a The First Affiliated Municipal Hospital , Guangzhou Medical University , Guangzhou , Guangdong , China
| | - Yumin Zhou
- b The State Key Laboratory of Respiratory Diseases , Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University , Guangzhou , Guangdong , China
| | - Yujun Li
- a The First Affiliated Municipal Hospital , Guangzhou Medical University , Guangzhou , Guangdong , China
| | - Changbin Jiang
- b The State Key Laboratory of Respiratory Diseases , Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University , Guangzhou , Guangdong , China
| | - Dongxing Zhao
- b The State Key Laboratory of Respiratory Diseases , Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University , Guangzhou , Guangdong , China
| | - Ziwen Zhao
- a The First Affiliated Municipal Hospital , Guangzhou Medical University , Guangzhou , Guangdong , China
| | - Zhaohui Liu
- a The First Affiliated Municipal Hospital , Guangzhou Medical University , Guangzhou , Guangdong , China
| | - Pixin Ran
- b The State Key Laboratory of Respiratory Diseases , Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital, Guangzhou Medical University , Guangzhou , Guangdong , China
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8
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Grainge C, Thomas PS, Mak JCW, Benton MJ, Lim TK, Ko FWS. Year in review 2015: Asthma and chronic obstructive pulmonary disease. Respirology 2016; 21:765-75. [PMID: 27028730 DOI: 10.1111/resp.12771] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 02/15/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Chris Grainge
- School of Medicine and Public Health, Centre for Asthma and Respiratory Disease, The University of Newcastle.,Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle
| | - Paul S Thomas
- Inflammation and Infection Research Centre and Prince of Wales' Hospital Clinical School, Faculty of Medicine, University of New South Wales, Kensington.,Department of Respiratory Medicine, Prince of Wales' Hospital, Randwick, New South Wales, Australia
| | - Judith C W Mak
- Department of Medicine and Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Melissa J Benton
- Helen and Arthur E. Johnson Beth-El College of Nursing and Health Sciences, University of Colorado Colorado Springs, Colorado, USA
| | - Tow Keang Lim
- Department of Medicine, National University Hospital, Singapore
| | - Fanny W S Ko
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China
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9
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UBXN2A regulates nicotinic receptor degradation by modulating the E3 ligase activity of CHIP. Biochem Pharmacol 2015; 97:518-530. [PMID: 26265139 DOI: 10.1016/j.bcp.2015.08.084] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/05/2015] [Indexed: 12/13/2022]
Abstract
Neuronal nicotinic acetylcholine receptors (nAChRs) containing the α3 subunit are known for their prominent role in normal ganglionic transmission while their involvement in the mechanisms underlying nicotine addiction and smoking-related disease has been emerging only in recent years. The amount of information available on the maturation and trafficking of α3-containing nAChRs is limited. We previously showed that UBXN2A is a p97 adaptor protein that facilitates the maturation and trafficking of α3-containing nAChRs. Further investigation of the mechanisms of UBXN2A actions revealed that the protein interacts with CHIP (carboxyl terminus of Hsc70 interacting protein), whose ubiquitin E3 ligase activity regulates the degradation of several disease-related proteins. We show that CHIP displays E3 ligase activity toward the α3 nAChR subunit and contributes to its ubiquitination and subsequent degradation. UBXN2A interferes with CHIP-mediated ubiquitination of α3 and protects the nicotinic receptor subunit from endoplasmic reticulum associated degradation (ERAD). UBXN2A also cross-talks with VCP/p97 and HSC70/HSP70 proteins in a complex where α3 is likely to be targeted by CHIP. Overall,we identify CHIP as an E3 ligase for α3 and UBXN2A as a protein that may efficiently regulate the stability of CHIP's client substrates.
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