Abstract：
OBJECTIVES:Modern data on endometrial cancer (EC) incidence demonstrate that it is one of the most prevalent gynecologic malignancies. It is possible that some allelic polymorphisms of the genes involved in steroidogenesis or steroid metabolism differently contribute into susceptibility to described types of this disease, namely to type I (which is considered to be hormone dependent) and type II. METHODS:Distribution of allelic polymorphisms of CYP17 (17alpha-hydroxylase/17,20-lyase), CYP19 (aromatase), catechol-O-methyltransferase (COMT) and CYP1B1 (primarily, estrogen 4-hydroxylase) genes was compared totally in 156 endometrial cancer patients, approximately two-third of who belonged (on the basis of case history and some characteristics of host and tumor) to type I of the disease, and one-third to type II. Blood leukocytes were used as source of normal DNA for PCR-genotyping. RESULTS:No differences were found in distribution of CYP17 and CYP1B1 genotypes between patients belonging to type I or II of the disease. On the other side, in case of CYP19, the ratio of incidence of A6A6 genotype to the frequency of A1A6 and A3A6 genotypes was higher in type II patients (1.0) than in type I patients (0.3). Besides, incidence of high activity (HH) COMT genotype was higher among patients with type I of disease than in patients with type II of it (33.3% versus 14.7%, OR=2.9, z=1.96, p=0.05) revealing tendency to the lower inactivation of catecholestrogens in the latter group. CONCLUSION:It may be suggested that more aggressive clinically and frequently receptor-negative type II of endometrial cancer is associated with indirect signs of mainly intratumoral hyperproduction of estrogens (excess of CYP19 A6A6 genotype) without their sufficient inactivation into methoxyderivatives that warrants further study.
journal_name
Maturitasjournal_title
Maturitasauthors
Berstein L,Zimarina T,Imyanitov E,Kovalevskij A,Maximov S,Pujol P,Thijssen Jdoi
10.1016/j.maturitas.2006.04.017subject
Has Abstractpub_date
2006-07-20 00:00:00pages
352-5issue
4eissn
0378-5122issn
1873-4111pii
S0378-5122(06)00140-Xjournal_volume
54pub_type
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