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Langlois AWR, Pouget JG, Knight J, Chenoweth MJ, Tyndale RF. Associating CYP2A6 structural variants with ovarian and lung cancer risk in the UK Biobank: replication and extension. Eur J Hum Genet 2024; 32:357-360. [PMID: 38097766 PMCID: PMC10923790 DOI: 10.1038/s41431-023-01518-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 10/27/2023] [Accepted: 11/28/2023] [Indexed: 03/10/2024] Open
Abstract
CYP2A6 is a polymorphic enzyme that inactivates nicotine; structural variants (SVs) include gene deletions and hybrids with the neighboring pseudogene CYP2A7. Two studies found that CYP2A7 deletions were associated with ovarian cancer risk. Using their methodology, we aimed to characterize CYP2A6 SVs (which may be misidentified by prediction software as CYP2A7 SVs), then assess CYP2A6 SV-associated risk for ovarian cancer, and extend analyses to lung cancer. An updated reference panel was created to impute CYP2A6 SVs from UK Biobank array data. Logistic regression models analyzed the association between CYP2A6 SVs and cancer risk, adjusting for covariates. Software-predicted CYP2A7 deletions were concordant with known CYP2A6 SVs. Deleterious CYP2A6 SVs were not associated with ovarian cancer (OR = 1.06; 95% CI: 0.80-1.37; p = 0.7) but did reduce the risk of lung cancer (OR = 0.44; 95% CI: 0.29-0.64; p < 0.0001), and a lung cancer subtype. Replication of known lung cancer associations indicates the validity of array-based SV analyses.
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Affiliation(s)
- Alec W R Langlois
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, 100 Stokes Street, Toronto, ON, M6J 1H4, Canada
| | - Jennie G Pouget
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, 100 Stokes Street, Toronto, ON, M6J 1H4, Canada
- Department of Psychiatry, University of Toronto, 250 College Street, Toronto, ON, M5T 1R8, Canada
| | - Jo Knight
- Data Science Institute and Medical School, Lancaster University, Lancaster, UK
| | - Meghan J Chenoweth
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, 100 Stokes Street, Toronto, ON, M6J 1H4, Canada
- Department of Psychiatry, University of Toronto, 250 College Street, Toronto, ON, M5T 1R8, Canada
| | - Rachel F Tyndale
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada.
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, 100 Stokes Street, Toronto, ON, M6J 1H4, Canada.
- Department of Psychiatry, University of Toronto, 250 College Street, Toronto, ON, M5T 1R8, Canada.
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2
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Ferrari E, Cornali C, Fiorindi A, Agosti E, Gallone S, Rubino E, Ponzio F, Fontanella MM, De Maria L. Cigarette Smoking and Intracranial Aneurysms: A Pilot Analysis of SNPs in the CYP2A6 Gene in the Italian Population. World Neurosurg 2023; 179:e492-e499. [PMID: 37689358 DOI: 10.1016/j.wneu.2023.08.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/28/2023] [Accepted: 08/31/2023] [Indexed: 09/11/2023]
Abstract
BACKGROUND Cigarette smoking is a modifiable risk factor associated with formation and rupture of intracranial aneurysms (IAs). Cytochrome P450 2A6 (CYP2A6) is the main enzyme implied in catabolism of nicotine and xenobiotics, giving rise to oxidative stress products. Our study investigated the associations between specific single-nucleotide polymorphisms (SNPs) in the CYP2A6 gene and the presence of sporadic IAs in a cluster of Italian patients, as well as their rupture regarding cigarette smoking habit. METHODS Three hundred and thirty-one Italian patients with sporadic IAs were recruited in a single institution. We recorded data on clinical onset with subarachnoid hemorrhage (SAH) and smoking habit. Genetic analysis was performed with a standard procedure on peripheral blood samples: CYP2A6 ∗1B2, CYP2A6 ∗2, and CYP2A6 ∗14 SNPs were analyzed in the study group along with 150 healthy control subjects. Statistical analysis was conducted according to genetic association study guidelines. RESULTS In the patient cohort, the frequency of aSAH was significantly higher in current smokers (P < 0.001; OR=17.45), regardless of the pattern of CYP2A6 SNPs. There was a correlation between IA rupture and cigarette smoking in patients with the heterozygous CYP2A6 ∗1B2 allele (P < 0.001; OR=15.47). All patients carrying the heterozygous CYP2A6 ∗14 allele had an aSAH event (100%), regardless of smoking habit, although this correlation was not statistically significant (P = 1). CONCLUSIONS According to our findings, a cigarette smoker carrying a fully active CYP2A6 enzyme (heterozygous ∗1B2 allele) may have an increased risk of IA rupture compared to those with functionally less active variants: further investigation on a larger sample is needed to verify this result. The role of the heterozygous CYP2A6 ∗14 allele in aSAH is yet to be clarified.
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Affiliation(s)
- Erika Ferrari
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Claudio Cornali
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Alessandro Fiorindi
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Edoardo Agosti
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Salvatore Gallone
- Department of Neuroscience "Rita Levi Montalcini", University of Torino, Turin, Italy
| | - Elisa Rubino
- Department of Neuroscience "Rita Levi Montalcini", University of Torino, Turin, Italy
| | - Francesco Ponzio
- Interuniversity Department of Regional and Urban Studies and Planning, Politecnico di Torino, Turin, Italy
| | - Marco Maria Fontanella
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy
| | - Lucio De Maria
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy.
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Association between CYP2E1 polymorphisms and colorectal cancer risk: a systematic review and meta-analysis. Sci Rep 2022; 12:20149. [PMID: 36418904 PMCID: PMC9684517 DOI: 10.1038/s41598-022-24398-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 11/15/2022] [Indexed: 11/24/2022] Open
Abstract
CYP2E1 encodes an enzyme that participates in the activation of several carcinogenic substances. Thus, numerous studies have investigated the association between CYP2E1 polymorphisms and colorectal cancer (CRC) risk, but inconclusive results have been obtained. We performed a meta-analysis to precisely evaluate the relationship of CYP2E1 rs2031920, rs3813867, and rs6413432 polymorphisms with the susceptibility to CRC. Scopus, Web of Science and PubMed databases were searched to identify eligible studies, and the association between the polymorphisms and CRC risk was then quantitatively synthesized using different genetic models. Eighteen studies with 23,598 subjects were selected for inclusion into the analysis. Significant association between rs2031920 and an increased CRC risk was observed in homozygous (OR = 1.496, 95% CI 1.177-1.901, P = 0.001), recessive (OR = 1.467, 95% CI 1.160-1.857, P = 0.001) and allele (OR = 1.162, 95% CI 1.001-1.349, P = 0.048) models. Significant association was not found for rs3813867 and rs6413432 (P > 0.05). In conclusion, our results suggest that rs2031920, but not rs3813867 and rs6413432, is associated with the risk of CRC.
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Ohnami S, Naruoka A, Isaka M, Mizuguchi M, Nakatani S, Kamada F, Shimoda Y, Sakai A, Ohshima K, Hatakeyama K, Maruyama K, Ohde Y, Kenmotsu H, Takahashi T, Akiyama Y, Nagashima T, Urakami K, Ohnami S, Yamaguchi K. Comparison of genetic susceptibility to lung adenocarcinoma and squamous cell carcinoma in Japanese patients using a novel panel for cancer-related drug-metabolizing enzyme genes. Sci Rep 2022; 12:17928. [PMID: 36289279 PMCID: PMC9606290 DOI: 10.1038/s41598-022-22914-6] [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: 08/01/2022] [Accepted: 10/20/2022] [Indexed: 01/20/2023] Open
Abstract
The differences in genetic susceptibility to lung adenocarcinoma and squamous cell carcinoma remain unclear. We developed a customized, targeted gene sequencing panel for efficient and sensitive identification of germline variants, including whole-gene deletion types for cancer-related drug-metabolizing enzyme genes in lung adenocarcinoma and squamous cell carcinoma. The minor allele frequencies of the variants, confirmed as clinically significant in the Japanese population, did not differ significantly from those of normal participants listed in the public database. Genotype analysis comparing lung adenocarcinoma (n = 559) and squamous cell carcinoma (n = 151) indicated that the variants of DPYD (rs190771411, Fisher's exact test, P = 0.045; rs200562975, P = 0.045) and ALDH2 (rs568781254, P = 0.032) were associated with an increased risk of squamous cell carcinoma compared to adenocarcinoma. Conversely, whole-gene deletion of CYP2A6 was associated with adenocarcinoma but not squamous cell carcinoma. Notably, whole-gene deletion of CYP2A6 was confirmed in 22 patients with lung adenocarcinoma but not in any patients with squamous cell carcinoma. Most patients with whole-gene deletion of CYP2A6 were female non-smokers. The discovery of a whole-gene deletion of CYP2A6 in patients with lung adenocarcinoma may have an important role in clinical practice and advance our understanding of CYP2A6 germline variants and their association with carcinogenesis or their susceptibility to lung adenocarcinoma.
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Affiliation(s)
- Sumiko Ohnami
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan
| | - Akane Naruoka
- grid.415797.90000 0004 1774 9501Drug Discovery and Development Division, Shizuoka Cancer Center Research Institute, Nagaizumi, Shizuoka Japan
| | - Mitsuhiro Isaka
- grid.415797.90000 0004 1774 9501Division of Thoracic Surgery, Shizuoka Cancer Center Hospital, Nagaizumi, Shizuoka Japan
| | - Maki Mizuguchi
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan
| | - Sou Nakatani
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan
| | - Fukumi Kamada
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan
| | - Yuji Shimoda
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan
| | - Ai Sakai
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan ,grid.410830.eSRL, Inc, Tokyo, Japan
| | - Keiichi Ohshima
- grid.415797.90000 0004 1774 9501Medical Genetics Division, Shizuoka Cancer Center Research Institute, Nagaizumi, Shizuoka Japan
| | - Keiichi Hatakeyama
- grid.415797.90000 0004 1774 9501Cancer Multiomics Division, Shizuoka Cancer Center Research Institute, Nagaizumi, Shizuoka Japan
| | - Kouji Maruyama
- grid.415797.90000 0004 1774 9501Experimental Animal Facility, Shizuoka Cancer Center Research Institute, Nagaizumi, Shizuoka Japan
| | - Yasuhisa Ohde
- grid.415797.90000 0004 1774 9501Division of Thoracic Surgery, Shizuoka Cancer Center Hospital, Nagaizumi, Shizuoka Japan
| | - Hirotsugu Kenmotsu
- grid.415797.90000 0004 1774 9501Division of Thoracic Oncology, Shizuoka Cancer Center Hospital, Nagaizumi, Shizuoka Japan
| | - Toshiaki Takahashi
- grid.415797.90000 0004 1774 9501Division of Thoracic Oncology, Shizuoka Cancer Center Hospital, Nagaizumi, Shizuoka Japan
| | - Yasuto Akiyama
- grid.415797.90000 0004 1774 9501Immunotherapy Division, Shizuoka Cancer Center Research Institute, Nagaizumi, Shizuoka Japan
| | - Takeshi Nagashima
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan ,grid.410830.eSRL, Inc, Tokyo, Japan
| | - Kenichi Urakami
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan
| | - Shumpei Ohnami
- grid.415797.90000 0004 1774 9501Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, 1007 Shimonagakubo, Nagaizumi-Cho, Shizuoka Japan
| | - Ken Yamaguchi
- grid.415797.90000 0004 1774 9501Shizuoka Cancer Center, Nagaizumi, Shizuoka Japan
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Babu G, Bin Islam S, Khan MA. A review on the genetic polymorphisms and susceptibility of cancer patients in Bangladesh. Mol Biol Rep 2022; 49:6725-6739. [PMID: 35277785 DOI: 10.1007/s11033-022-07282-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/14/2022] [Accepted: 02/16/2022] [Indexed: 10/18/2022]
Abstract
Cancer is one of the major health burdens worldwide, and genetic polymorphisms in individuals are closely associated with cancer susceptibility. Like in many other developing countries, the risk of cancer is increasing among Bangladeshi population. Genetic polymorphisms in xenobiotic metabolic enzymes (CYP1A1, CYP2A6, CYP3A4, CYP3A5, NAT2, SULT1A), cell cycle regulatory proteins (TP53, HER2, MDM2, miR-218-2, TGFB), cell signaling protein (CDH1), DNA repair proteins (BRCA1, BRCA2, EXO1, RAD51, XRCC2, ECCR1, ERCC4, XPC, ERCC2), and others (HLA-DRB1, INSIG2, GCNT1P5) have been found to be associated with various cancers like cancers of breast, bladder, cervix, colon, lung, prostate, etc. in different studies with Bangladeshi population. In this review article, we have discussed these gene polymorphisms associated with cancers in the Bangladeshi population, and also made a comparison with other ethnic groups. This will probably be helpful in understanding drug effects, drug resistance, and personalized medicine in the population of this region.
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Affiliation(s)
- Golap Babu
- Department of Biochemistry and Molecular Biology, Jahangirnagar University, 1342, Dhaka, Bangladesh
| | - Shad Bin Islam
- Bachelor in Medicine and Surgery Program, Affiliated hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Md Asaduzzaman Khan
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, 646000, Luzhou, Sichuan, China.
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Soeroso N, Zain-Hamid R, Bihar S, Tarigan SP, Ananda FR. Genetic Polymorphism of Cyp2a6 and Cyp2a13 Genes and Environmental Tobacco Smoke Induced Lung Cancer Risk in Indonesian Female Never Smokers. Open Access Maced J Med Sci 2021. [DOI: 10.3889/oamjms.2021.6069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: The presence of nicotine metabolite in the urine of subjects exposed to tobacco smoke represents the nicotine metabolism activity in environmental tobacco smokers. CYP2A6 and CYP2A13 are known as the main enzymes responsible for nicotine metabolism and xenobiotic activity in tobacco smoke-related lung cancer.
AIM: The aim of this study is to analyze the relationship between genetic polymorphism of CYP26 and CYP2A13 genes and environmental tobacco smoke-induced lung cancer risk in Indonesian females never smoker.
METHODS: This is a case-control study with two-stage of distinguishing polymorphism detection. Restriction fragment length polymorphism polymerase chain reaction from venous blood extraction was performed to examine the CYP2A6 and CYP2A13 polymorphism. Logistic regression test in Epi Info-7 software was carried out to examine genetic polymorphism of CYP2A6 and CYP2A13 genes and environmental tobacco smoke-induced lung cancer risk in Indonesian female never smokers.
RESULTS: A total of 203 participants enrolled in this study with the first stage of CYP2A6 polymorphism involved 101 subjects showed no significant correlation between the genotypes of CYP2A6 and the incidence of lung cancer. On the other hand, there was a significant correlation between genotypes of CYP2A13 and the incidence of lung cancer (p < 0.05). People with the genotype CT have a 2.7 higher risk for developing lung cancer compare with genotype CC. Allele *1B was the most common allele in CYP2A6. Allele C has more frequencies and has 0.62 times the risk for developing lung cancer compared with allele T with a wide range of confidence intervals (0.73–3.52).
CONCLUSIONS: There was a significant correlation between polymorphism CYP213 with the incidence of lung cancer among female lung cancer never smoker. However, the results show no significant relationship between CYP2A6 genetic polymorphism and lung cancer incidence.
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Murphy SE. Biochemistry of nicotine metabolism and its relevance to lung cancer. J Biol Chem 2021; 296:100722. [PMID: 33932402 PMCID: PMC8167289 DOI: 10.1016/j.jbc.2021.100722] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 12/27/2022] Open
Abstract
Nicotine is the key addictive constituent of tobacco. It is not a carcinogen, but it drives smoking and the continued exposure to the many carcinogens present in tobacco. The investigation into nicotine biotransformation has been ongoing for more than 60 years. The dominant pathway of nicotine metabolism in humans is the formation of cotinine, which occurs in two steps. The first step is cytochrome P450 (P450, CYP) 2A6–catalyzed 5′-oxidation to an iminium ion, and the second step is oxidation of the iminium ion to cotinine. The half-life of nicotine is longer in individuals with low P450 2A6 activity, and smokers with low activity often decrease either the intensity of their smoking or the number of cigarettes they use compared with those with “normal” activity. The effect of P450 2A6 activity on smoking may influence one's tobacco-related disease risk. This review provides an overview of nicotine metabolism and a summary of the use of nicotine metabolite biomarkers to define smoking dose. Some more recent findings, for example, the identification of uridine 5′-diphosphoglucuronosyltransferase 2B10 as the catalyst of nicotine N-glucuronidation, are discussed. We also describe epidemiology studies that establish the contribution of nicotine metabolism and CYP2A6 genotype to lung cancer risk, particularly with respect to specific racial/ethnic groups, such as those with Japanese, African, or European ancestry. We conclude that a model of nicotine metabolism and smoking dose could be combined with other lung cancer risk variables to more accurately identify former smokers at the highest risk of lung cancer and to intervene accordingly.
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Affiliation(s)
- Sharon E Murphy
- Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA.
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