Higher glutathione transferase GSTM1 0/0 genotype frequency in young thyroid carcinoma patients.
OBJECTIVE
Glutathione S-transferases (GSTs) comprise a large supergene family and detoxify a variety of endogenous and exogenous electrophilic compounds. Since many GSTs are polymorphic, there has been considerable interest in determining whether particular allelic variants are associated with altered risk for various disorders.


METHODS
In this study the association between the variant GSTM1 0/0 genotype and thyroid carcinoma was investigated. A hospital-based, case-controlled study was carried out. Polymorphisms of GSTM1 0/0 (i.e. the null allele of GSTM1) in samples from 32 cases and 44 controls were detected by polymerase chain reaction (PCR) methodology. The proportions of GSTM1 deleted genotype in cases and controls were 59.4% and 54.5%, respectively.


RESULTS
There were significant increments of GSTM 0/0 genotype frequency in a group of patients aged under 40 (p = 0.033, odds ratio (OR) = 4.78, 95% confidence interval (CI) = 1.30-7.13) and in former smokers compared with controls (p = 0.039, OR 2.45, 95% CI 0.216-4.72).


CONCLUSIONS
GSTM1 deleted genotype may be a useful genetic biomarker for thyroid carcinoma susceptibility in young subjects. The absence of this enzyme seems to have a role in the development of thyroid carcinoma; however, the mechanism still needs further study.
Canbay
Emel
E
Department of General Surgery, Cumhuriyet University Hospital, Sivas, Turkey. canbay@cumhuriyet.edu.tr
Dokmetas
Sebila
S
Canbay
Ercan Ismet
EI
Sen
Metin
M
Bardakci
Fevzi
F
D000328:Adult; D016022:Case-Control Studies; D005260:Female; D017353:Gene Deletion; D005819:Genetic Markers; D020022:Genetic Predisposition to Disease; D005982:Glutathione Transferase / Q000235:genetics* / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D013964:Thyroid Neoplasms / Q000235:genetics* / Q000378:metabolism
D005819:Genetic Markers; D005982:Glutathione Transferase