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Zhang F, Wu X, Niu J, Kang X, Cheng L, Lv Y, Wu M. GSTM1 polymorphism is related to risks of nasopharyngeal cancer and laryngeal cancer: a meta-analysis. Onco Targets Ther 2017; 10:1433-1440. [PMID: 28331336 PMCID: PMC5348073 DOI: 10.2147/ott.s131611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Accumulating data have reported that GSTM1 polymorphism may be related to nasopharyngeal cancer (NPC) and laryngeal cancer (LC). This meta-analysis was performed to investigate the relationship between GSTM1 polymorphism and risks of NPC and LC. Methods Pubmed, Embase, and China National Knowledge Infrastructure (CNKI) databases were searched for potential articles. Odds ratios (ORs) and 95% confidence intervals (CIs) were used to evaluate the relationship of GSTM1 polymorphism with the risks of NPC and LC. I2>50% or P<0.05 indicates significant heterogeneity. When heterogeneity existed, the random-effects model was used to pool data, otherwise, the fixed-effects model was adopted. Publication bias was detected by Begg’s funnel plot and Egger’s regression. Quality of each study was evaluated by Newcastle-Ottawa Scale. Results Thirty-two eligible articles were included. Pooled outcome suggested the significant relationship of GSTM1 null genotype with increased risk of LC (OR =1.28, 95% CI =1.05–1.54). Compared with hospital-based (HB) population, GSTM1 null genotype was also related to increased risk of LC (OR =1.38, 95% CI =1.06–1.80). Positive relationship of GSTM1 null genotype with enhanced risk of NPC was observed (OR =1.43, 95% CI =1.26–1.63). A similar trend was also observed in the subgroup analysis by source of control (population-based [PB]: OR =1.39, 95% CI =1.18–1.63; HB: OR =1.52, 95% CI =1.22–1.89). Conclusion GSTM1 null genotype is related to increased risk of NPC and LC.
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Affiliation(s)
- Fengying Zhang
- Otorhinolaryngological Department, Wei Fang Traditional Chinese Hospital, Weifang, Shandong Province, China
| | - Xijiang Wu
- Otorhinolaryngological Department, Shouguang Peoples Hospital, Shouguang, Shandong Province, China
| | - Jinming Niu
- Otorhinolaryngological Department, Wei Fang Traditional Chinese Hospital, Weifang, Shandong Province, China
| | - Xiufeng Kang
- Medical insurance office, Shouguang Peoples Hospital, Shouguang, Shandong Province, China
| | - Liya Cheng
- Otorhinolaryngological Department, Wei Fang Traditional Chinese Hospital, Weifang, Shandong Province, China
| | - Yanchun Lv
- Otorhinolaryngological Department, Wei Fang Traditional Chinese Hospital, Weifang, Shandong Province, China
| | - Meimei Wu
- Otorhinolaryngological Department, Wei Fang Traditional Chinese Hospital, Weifang, Shandong Province, China
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2
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GSTM1 null polymorphisms is associated with laryngeal cancer risk: a meta-analysis. Tumour Biol 2014; 35:6303-9. [DOI: 10.1007/s13277-014-1828-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 03/05/2014] [Indexed: 11/26/2022] Open
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Masood N, Yasmin A, Kayani MA. Genetic Deletions of GSTM1 and GSTT1 in Head and Neck Cancer: Review of the Literature from 2000 to 2012. Asian Pac J Cancer Prev 2013; 14:3535-9. [DOI: 10.7314/apjcp.2013.14.6.3535] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Masood N, Kayani MA. Protection against laryngeal and pharyngeal carcinoma: Heterozygous vs. homozygous deletions of GSTM1 and GSTT1. Genet Mol Biol 2013; 36:1-6. [PMID: 23569401 PMCID: PMC3615511 DOI: 10.1590/s1415-47572013005000006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 08/03/2012] [Indexed: 11/22/2022] Open
Abstract
Deletions in GSTM1 and GSTT1 genes are considered to be a risk factor for cancer development but the exact location of these deletions in the genome was unknown. Three main objectives of the current study were to: (a) identify the boundaries of these deletions in the human genome, (b) screen homozygous (−/−) and heterozygous (+/−) deleted, as well as homozygous present (+/+) individuals using PCR assays, (c) detect associations of pharyngeal (PC) and laryngeal cancer (LC) with the respective genotypes. In total, 102 PC and 92 LC patients were screened and compared with 150 controls. PCR mapping and sequencing revealed a 6 kbp deletion for GSTM1 and a 9 kbp deletion for the GSTT1 gene. The mean age of PC cases was 48.1 (±16.7) years; for LC cases it was 48.5 (±17.4) years and for controls 46 (±17.7) years. The OR (odds ratio) for the GSTM1 null genotype in PC and LC cases was 10.2 and 1.0 (95% CI 5.04–20.7 and 1.1–1.7) respectively. Similarly, for GSTT1 the OR was 4.02 with a 95% CI of 2.3–7.1 in PC cases. For LC cases the OR was 0.8 with 95% CI of 0.4–1.7. A non-significant number of LC and PC patients had heterozygous deletions of GSTM1 compared to controls (OD 0.5, 95% CI 0.2– 1.6 and OR 0.5, 95% CI 0.2– 1.5 respectively). The GSTT1 gene also showed a non-significant association in PC (OD 0.9, 95% CI 0.4–1.9), as well as in LC patients (OD 0.7, 95% CI 0.3–1.7). The homozygous genotype was significantly associated with PC and LC, whereas the heterozygous was not so. The GSTM1 (−/−) and GSTT1 (−/−) genotypes are a risk factor for LC and PC, whereas the (+/−) genotypes are not.
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Affiliation(s)
- Nosheen Masood
- Cancer Genetics Laboratory, Department of Biosciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
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5
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Quantitative assessment of the association between GSTM1 null genotype and laryngeal cancer risk. Eur Arch Otorhinolaryngol 2012; 270:615-22. [PMID: 22972496 DOI: 10.1007/s00405-012-2148-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 07/31/2012] [Indexed: 12/11/2022]
Abstract
Previous studies investigating the association between glutathione S-transferase M1 (GSTM1) null genotype and laryngeal cancer risk reported controversial results. Thus, a meta-analysis was performed to clarify the effect of GSTM1 null genotype on laryngeal cancer risk. A literature search was performed for all possible studies. We estimated summary odd ratio (OR) with its 95 % confidence interval (95 % CI) to assess the association. Subgroup analyses were performed by ethnicity or the sample size. 24 individual case-control studies involving a total of 2,809 laryngeal cancer cases and 4,478 controls were finally included into this meta-analysis. Meta-analyses of total 24 studies showed the GSTM1 null genotype was significantly associated with increased laryngeal cancer risk (random-effects OR = 1.44, 95 % CI 1.19-1.73, P < 0.001). Subgroup analyses by ethnicity showed that the GSTM1 null genotype was associated with increased laryngeal cancer risk in both Caucasians (fixed-effects OR = 1.17, 95 % CI 1.04-1.33, P = 0.012) and Asians (random-effects OR = 1.89, 95 % CI 1.28-2.77, P = 0.001). Also, subgroup analyses by sample size also further identified this association above. The cumulative meta-analyses showed a trend of more obvious association between GSTM1 null genotype and increased risk of laryngeal cancer as information accumulated by year. Meta-analysis of available data suggests that GSTM1 null genotype contributes to increased laryngeal cancer risk in both Caucasians and East Asians.
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6
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Ying XJ, Dong P, Shen B, Xu CZ, Xu HM, Zhao SW. Glutathione S-transferase M1 gene polymorphism and laryngeal cancer risk: a meta-analysis. PLoS One 2012; 7:e42826. [PMID: 22900055 PMCID: PMC3416752 DOI: 10.1371/journal.pone.0042826] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Accepted: 07/12/2012] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Studies investigating the association between glutathione S-transferase M1 (GSTM1) gene polymorphism and laryngeal cancer risk have reported conflicting results. The aim of the present study was to conduct a meta-analysis assessing the possible associations of GSTM1 gene polymorphism with laryngeal cancer risk. METHODS The relevant studies were identified through a search of PubMed, Embase, ISI Web of Knowledge and Chinese National Knowledge Infrastructure until May 2011 and selected on the basis of the established inclusion criteria for publications, then a meta-analysis was performed to quantitatively summarize association of GSTM1 polymorphism with laryngeal cancer susceptibility. RESULTS Seventeen studies were included in the present meta-analysis (2,180 cases and 2,868 controls). The combined results based on all studies showed that GSTM1 null genotype was associated with increased laryngeal cancer risk (OR = 1.17, 95% CI = 1.04∼1.31). When stratifying for race, GSTM1 null genotype exhibited increased laryngeal cancer risk in Caucasians (OR = 1.15, 95% CI = 1.01∼1.31), while no significant association was detected in Asians (OR = 1.25, 95% CI = 0.80∼1.96). In the subgroup analysis based on source of controls, significant associations were observed in the population-based studies (OR = 1.15, 95% CI = 1.01∼1.31) yet not in the hospital-based studies (OR = 1.25, 95% CI = 0.93∼1.67). Furthermore, in the subgroup analysis based on sample size, significant associations were also found in studies with at least 50 cases and 50 controls (OR = 1.15, 95% CI = 1.02∼1.30) but not in studies with fewer than 50 cases or 50 controls (OR = 1.46, 95% CI = 0.87∼2.46). CONCLUSIONS This meta-analysis supported that the GSTM1 gene polymorphism was associated with laryngeal cancer, particularly in Caucasians, and these associations varied in different subgroup, which indicated that population-based study with larger sample size was more appropriate in design of future study.
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Affiliation(s)
- Xin-Jiang Ying
- Department of Otolaryngology-Head and Neck Surgery, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Pin Dong
- Department of Otolaryngology-Head and Neck Surgery, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Bin Shen
- Department of Otolaryngology-Head and Neck Surgery, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Cheng-Zhi Xu
- Department of Otolaryngology-Head and Neck Surgery, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hong-Ming Xu
- Department of Otolaryngology-Head and Neck Surgery, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Shu-Wei Zhao
- Department of Otolaryngology, Changzheng Hospital, Second Military Medical University, Shanghai, China
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7
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CADONI G, BOCCIA S, PETRELLI L, DI GIANNANTONIO P, ARZANI D, GIORGIO A, DE FEO E, PANDOLFINI M, GALLÌ P, PALUDETTI G, RICCIARDI G. A review of genetic epidemiology of head and neck cancer related to polymorphisms in metabolic genes, cell cycle control and alcohol metabolism. ACTA OTORHINOLARYNGOLOGICA ITALICA : ORGANO UFFICIALE DELLA SOCIETA ITALIANA DI OTORINOLARINGOLOGIA E CHIRURGIA CERVICO-FACCIALE 2012; 32:1-11. [PMID: 22500060 PMCID: PMC3324962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 12/20/2011] [Indexed: 11/18/2022]
Abstract
The purpose of this report is to review the relationship between genetic polymorphisms involved in carcinogen metabolism, alcohol metabolism and cell-cycle control with the risk of head and neck cancer. The review was performed on available studies on genetic polymorphisms and head and neck cancer (HNC) published in PubMed up to September 2011. 246 primary articles and 7 meta-analyses were published. Among these, a statistically significant association was reported for glutathione S-transferases (GSTM1), glutathione S-transferases (GSTT1) and human microsomal epoxide hydrolase (EPHX1) genes. An increased risk for HNC was also associated reported for P53 codon 72 Pro/Pro, ALDH2 and three variants of the ADH gene: ADH1B (rs1229984), ADH7 (rs1573496) and ADH1C (rs698).
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Affiliation(s)
- G. CADONI
- Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy;,Address for correspondence: Gabriella Cadoni, Ist. Otorinolaringoiatria, Università Cattolica Sacro Cuore, Policlinico A. Gemelli, largo A. Gemelli 8, 00168 Roma, Italy. Tel. +39 06 30154439.
| | - S. BOCCIA
- Institute of Hygiene, Università Cattolica del Sacro Cuore, Rome, Italy;, IRCCS, San Raffaele Pisana, Rome, Italy
| | - L. PETRELLI
- Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | | | - D. ARZANI
- Institute of Hygiene, Università Cattolica del Sacro Cuore, Rome, Italy
| | - A. GIORGIO
- Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - E. DE FEO
- Institute of Hygiene, Università Cattolica del Sacro Cuore, Rome, Italy
| | - M. PANDOLFINI
- Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - P. GALLÌ
- Institute of Hygiene, Università Cattolica del Sacro Cuore, Rome, Italy
| | - G. PALUDETTI
- Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - G. RICCIARDI
- Institute of Hygiene, Università Cattolica del Sacro Cuore, Rome, Italy
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Moreno-Luna R, Abrante A, Esteban F, González-Moles MA, Delgado-Rodríguez M, Sáez ME, González-Pérez A, Ramírez-Lorca R, Real LM, Ruiz A. Calpain 10 gene and laryngeal cancer: a survival analysis. Head Neck 2011; 33:72-6. [PMID: 20848425 DOI: 10.1002/hed.21404] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Laryngeal carcinoma is a common upper respiratory tract cancer with different environmental and genetic factors involved in its development. Calpains are Ca2+-dependent cysteine proteases that modulate cellular function. A novel association between calpain 10 (CAPN10) haplotypes and laryngeal cancer has been found recently. Therefore, the goal of this study was to analyze the contribution of CAPN10 alleles to laryngeal cancer survival. METHODS Patients were recruited from southern Spain. Genotypes were determined using pyrosequencing technology. We analyzed CAPN10 UCSNP-44, UCSNP-43, UCSNP-19, and UCSNP-63 allelic distributions in 199 patients with unrelated laryngeal cancer. Survival curves were calculated from the date of the intervention to the date of death. Multivariate analyses were done using the Cox proportional risk model. RESULTS UCSNP-19, UCSNP-43, and UCSNP-44 were unrelated to survival in both univariate and multivariate analyses. However, for UCSNP-63 genotype 12 a significant relationship was observed in multivariate analysis (hazard ratio [HR] = 2.73; 95% confidence interval [CI], 1.21-6.20). CONCLUSION CAPN10 UCSNP-63 genotype 12 seems to be related with a worse prognosis in laryngeal cancer.
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Affiliation(s)
- Ramón Moreno-Luna
- Servicio de Otorrinolaringología, Hospital Universitario Virgen del Rocío, Avda Manuel Siurot s/n, 41013 Sevilla, Spain.
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9
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Zhuo WL, Wang Y, Zhuo XL, Zhu B, Zhu Y, Chen ZT. Polymorphisms of CYP1A1 and GSTM1 and laryngeal cancer risk: evidence-based meta-analyses. J Cancer Res Clin Oncol 2009; 135:1081-90. [PMID: 19252926 DOI: 10.1007/s00432-009-0548-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Accepted: 01/04/2009] [Indexed: 11/29/2022]
Abstract
PURPOSE Previous evidence implicates CYP1A1 and GSTM1 polymorphisms as risk factors for various cancers. A number of studies have been devoted to the association of CYP1A1 or GSTM1 polymorphism with susceptibility to laryngeal carcinoma, with the results inconsistent and inconclusive. The aim of the present study was to assess the possible associations of laryngeal cancer risk with CYP1A1 genetic variation and GSTM1 null genotype respectively. METHODS The associated literature was acquired through deliberate searching and selected based on the established inclusion criteria for publications, then the extracted data were further analyzed using systematic meta-analyses. RESULTS The results showed that the overall odds ratio (OR) was 1.32 (95% CI = 1.08-1.61) for CYP1A1 Mspl polymorphism. Using subgroup analysis, the pooled ORs were 1.38 (95% CI = 0.98-1.95) in Asians and 1.29 (95% CI = 1.01-1.65) in Caucasians. For CYP1A1 exon7 polymorphism, the overall OR was 1.38 (95% CI = 0.98-1.95). The overall OR was 1.24 (95% CI = 1.03-1.49) for GSTM1 polymorphism and the pooled ORs were 1.36 (95% CI = 0.75-2.48) in Asians, 1.16 (95% CI = 0.94-1.44) in Caucasians and 1.52 (95% CI = 1.05-2.19) in Turkey population. CONCLUSIONS The data suggest CPY1A1 MspI polymorphism as a risk factor for laryngeal cancer in Caucasians but not in Asians. However, the results suggest a marked correlation of GSTM1 polymorphism with laryngeal cancer risk in Turkey population but not Caucasians and Asians.
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Affiliation(s)
- Wen-Lei Zhuo
- Institute of Cancer, Xinqiao Hospital, Third Military Medical University, 400038 Chongqing, China
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Esteban F, Royo JL, González-Moles MA, Gonzalez-Perez A, Redondo M, Moreno-Luna R, Rodríguez-Sola M, Gonzalez A, Real LM, Ruiz A, Ramírez-Lorca R. CAPN10 alleles modify laryngeal cancer risk in the Spanish population. Eur J Surg Oncol 2008; 34:94-9. [PMID: 17382509 DOI: 10.1016/j.ejso.2007.02.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2007] [Accepted: 02/06/2007] [Indexed: 01/24/2023] Open
Abstract
AIMS Laryngeal carcinoma is a common upper respiratory tract cancer with different environmental and genetic factors involved in its development. To date, CAPN10 has been found to be extensively associated with hyperinsulinaemia and type 2 diabetes mellitus, by different groups. In addition, some reports have shown evidence that hyperinsulinaemia exerts a protective effect on laryngeal cancer risk. On the other hand, low circulating levels of IGF-1 have been recently found in patients with laryngeal carcinoma. Our objective was to examine the contribution of CAPN10 alleles to the development of laryngeal cancer. METHODS Cases and controls were recruited from central and southern Spain. Genotypes were determined using pyrosequencing technology. We analysed CAPN10 UCSNP-44, -43, -19, and -63 allelic distribution in 218 unrelated laryngeal cancer patients and 606 controls from the general population. RESULTS We found that the UCSNP-44 allele-C is significantly under-represented among patients with laryngeal cancer (OR=0.685, p=0.02). CONCLUSION These results indicate that some CAPN10 alleles may be exerting a protective effect on laryngeal cancer risk in the Spanish population.
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Affiliation(s)
- F Esteban
- Servicio de Otorrinolaringologia, Hospital Universitario Virgen del Rocío, Avda Manuel Siurot s/n, 41013 Sevilla, Spain
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11
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Concolino P, Cecchetti F, D'Autilia C, Santonocito C, Di Stasio E, Zuppi C, Arcuri C, Deli G, Giardina B, Capoluongo E, Ameglio F. Association of periodontitis with GSTM1/GSTT1-null variants—A pilot study. Clin Biochem 2007; 40:939-45. [PMID: 17524385 DOI: 10.1016/j.clinbiochem.2007.04.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2007] [Revised: 04/10/2007] [Accepted: 04/18/2007] [Indexed: 01/09/2023]
Abstract
OBJECTIVES To analyze a possible association between glutathione-S-transferase T1 (GSTM1) and/or glutathione-S-transferase M1 (GSTM1) polymorphisms and chronic or aggressive forms of periodontitis in a Caucasian ethnic group. DESIGN AND METHODS Sixty-nine chronic, 14 aggressive periodontitis and 61 controls, deeply analyzed from a clinical point of view, were studied for their GSTM1 and GSTT1 polymorphisms by allelic specific PCR techniques. As a second control group, 64 blood donors were also included. RESULTS A significant association was found between GSTM1-null genotype and both chronic and aggressive periodontitis. The aggressive forms were associated with the double null GSTM1 and GSTT1 combination. These results were independent of the patients' age, gender, hygienic habits and smoke (evaluated as tobacco smoking yes/no, cigarettes/day and pack years) as confirmed by multivariate logistic regression analysis. CONCLUSIONS The GSTM1-null variant is statistically associated with the two forms of periodontitis, while the aggressive one also presents a second null variant: GSTT1.
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Affiliation(s)
- Paola Concolino
- Institute of Biochemistry and Clinical Biochemistry, Catholic University of Rome, Italy
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12
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Capoluongo E, Almadori G, Concolino P, Bussu F, Santonocito C, Vendittelli F, Galli J, Zuppi C, Ameglio F, Paludetti G, Giardina B. GSTT1 and GSTM1 allelic polymorphisms in head and neck cancer patients from Italian Lazio Region. Clin Chim Acta 2006; 376:174-8. [PMID: 17005168 DOI: 10.1016/j.cca.2006.08.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2006] [Revised: 08/08/2006] [Accepted: 08/15/2006] [Indexed: 11/19/2022]
Abstract
BACKGROUND The association between head and neck squamous cell carcinoma (HNSCC) and allelic variants of glutathione S-transferase M1 (GSTM1) and -T1 (GSTT1) is currently controversial. The present study investigates the prevalences of GSTT1 and GSTM1 polymorphism in a cohort of 100 head and neck cancer patients, 100 healthy donors and 200 controls with non-neoplastic head and neck diseases from Italian Lazio Region. METHODS The patients with benign head and neck pathologies, as well as the healthy donors were matched for age, sex, cigarette smoke (yes/no) and alcohol consumption (yes/no). Molecular definition of GSTT1 and GSTM1 genotype has been performed by means of allele-specific PCR technique. RESULTS A significant association between head and neck cancer and GSTM1 null genotype was observed both considering benign disease controls (p=0.001, OR=2.613; 95% C.I.=1.48-4.62), and healthy donors (p=0.0003, OR=3.35; 95% C.I. 1.69-6.67) while no significant association was found with GSTT1 null genotype (p>or=0.14). No interactive association was observed when combining the different genotypes of the two polymorphisms. These results were confirmed after correction for daily number of cigarettes and period of tobacco exposure. CONCLUSIONS The present study confirms a role for genetic alterations of GSTM1 detoxifying enzyme as a risk factor for the development of HNSCC in patients from the Italian Lazio Region, independently of age, sex and other confounding variables.
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Affiliation(s)
- Ettore Capoluongo
- Laboratory of Molecular Biology, Department of Biochemistry and Clinical Biochemistry-Catholic University, Rome, Italy.
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