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Polycyclic aromatic hydrocarbon exposure in oesophageal tissue and risk of oesophageal squamous cell carcinoma in north-eastern Iran

Abedi-Ardekani, B. and Kamangar, F. and Hewitt, S.M. and Hainaut, P. and Sotoudeh, M. and Abnet, C.C. and Taylor, P.R. and Boffetta, P. and Malekzadeh, R. and Dawsey, S.M. (2010) Polycyclic aromatic hydrocarbon exposure in oesophageal tissue and risk of oesophageal squamous cell carcinoma in north-eastern Iran. Gut, 59 (9). pp. 1178-1183.

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Abstract

Objective: To evaluate the association between polycyclic aromatic hydrocarbon (PAH) exposure in oesophageal epithelial tissue and oesophageal squamous cell carcinoma (ESCC) case status in an ESCC case - control study in a high-risk population in north-eastern Iran. Methods: Tissue microarrays (TMAs) of non-tumoral oesophageal biopsies from patients with biopsy-proven ESCC and gastrointestinal clinic patients with no endoscopic or biopsy evidence of ESCC (control subjects) in a rural region in north-eastern Iran were immunohistochemically stained. Immunohistochemistry was performed using monoclonal antibodies 8E11 and 5D11 raised against benzoapyrene (BaP) diol epoxide (BPDE)-I-modified guanosine and BPDE-I-modified DNA, respectively. Staining intensity was quantified by image analysis and the average staining in three replicates was calculated. The main outcome measure was adjusted ORs with 95% CIs for the association between antibody staining intensity and ESCC case status. Results: Cultured ESCC cells exposed to BaP in vitro showed dose-dependent staining with 8E11 but not with 5D11. With 8E11, sufficient epithelial tissue was available in the TMA cores to analyse 91 cases and 103 controls. Compared with the lowest quintile of 8E11 staining in the controls, adjusted ORs for the 2nd to 5th quintiles were 2.42, 5.77, 11.3 and 26.6 (95% CI 5.21 to 135), respectively (p for trend <0.001). With 5D11, 89 cases and 101 controls were analysed. No association between staining and case status was observed (ORs for the 2nd to 5th quintiles were 1.26, 0.88, 1.06 and 1.63 (95% CI 0.63 to 4.21), p for trend=0.40). Conclusions Dramatically higher levels of 8E11 staining were observed in non-tumoral oesophageal epithelium from patients with ESCC than from control subjects. This finding strengthens the evidence for a causal role for PAHs in oesophageal carcinogenesis in north-eastern Iran.

Item Type: Article
Additional Information: cited By 24
Uncontrolled Keywords: benzoapyrene; guanosine; polycyclic aromatic hydrocarbon; polycyclic aromatic hydrocarbon, adult; aged; article; cancer risk; carcinogenesis; controlled study; DNA modification; esophageal squamous cell carcinoma; esophagus; esophagus biopsy; esophagus mucosa; female; high risk population; human; human tissue; immunohistochemistry; Iran; major clinical study; male; priority journal; tissue microarray; biopsy; case control study; chemically induced; chemistry; dose response; esophagus tumor; image processing; middle aged; pathology; squamous cell carcinoma; toxicity; tumor cell culture, Adult; Aged; Biopsy; Carcinoma, Squamous Cell; Case-Control Studies; Dose-Response Relationship, Drug; Esophageal Neoplasms; Female; Humans; Image Processing, Computer-Assisted; Male; Middle Aged; Polycyclic Hydrocarbons, Aromatic; Tumor Cells, Cultured
Subjects: کهورت
مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
موارد کلی
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 20 Apr 2015 08:46
Last Modified: 05 Apr 2017 10:17
URI: http://eprints.goums.ac.ir/id/eprint/2569

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