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Reduced Fhit protein expression and loss of heterozygosity at FHIT gene in tumours from smoking and asbestos-exposed lung cancer patients.

Abstract：

:The FHIT gene, at 3p14.2, has been suggested to form a molecular target to damage induced by human lung carcinogens. We examined aberrant expression of the Fhit protein and allele loss at the FHIT gene in a series of lung cancer cases, mainly of non-small cell carcinoma (NSCLC) histology. We had detailed data on tobacco smoke exposure and occupational asbestos exposure available for the cases. The principal aim of the present study was to investigate whether absent or reduced Fhit expression or FHIT allele loss was associated with exposure to these pulmonary carcinogens. We detected reduced Fhit expression in 62% (33/53) of the cases analysed. Prevalence of allele loss at the FHIT locus was 22% (20/89). Reduced protein expression was common both in the asbestos-exposed (67%) and non-exposed cases (59%); [odds ratio (OR) 1.4, 95% confidence interval (CI) 0.4-4.9]. LOH frequencies differed somewhat between the two groups and were 25% vs. 16%, respectively (OR 1.8; 95% CI 0.5-5.9). Absent or reduced expression was common in smokers, with no significant difference found between current smokers and non-smokers (mainly former smokers) (OR 1.4, 95% CI 0.5-4.5). NSCLCs with squamous cell histology exhibited both aberrant expression (OR 3.1, 95% CI 0.9-10.3) and allele loss (OR 3.3, 95% CI 0.9-12.7) more frequently than adenocarcinoma. Finally, we found that FHIT allele loss was increased in stage II or more advanced disease (OR 2.5, 95% CI 0.9-7.4), and in poorly differentiated tumours (grade 3, OR 2.6, 95% CI 0.8-8.1). In conclusion, our present data support significance of FHIT inactivation in development of lung cancer.

journal_name

Int J Oncol

journal_title

International journal of oncology

authors

Pylkkanen L,Wolff H,Stjernvall T,Tuominen P,Sioris T,Karjalainen A,Anttila S,Husgafvel-Pursiainen K

keywords:

subject

Has Abstract

pub_date

2002-02-01 00:00:00

pages

285-90

issue

2

eissn

1019-6439

issn

1791-2423

journal_volume

20

pub_type

杂志文章

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