Association of GSTM1 and GSTT1 null genotypes with risk of non-Hodgkin malignant lymphoma
The null genotypes of glutathione S-transferases M1 and T1 ( GSTM1 0/0 and GSTT1 0/0 ) lead to a decrease in gene expression and a significant decrease in enzymatic activity, and can mediate a susceptibility to non-Hodgkin malignant lymphomas (NHL).Aim: to determine the role of the “null” genotypes of glutathione-S-transferases M1 and T1 in creating a risk of developingdiffuse B-large cell, diffuse B-small cell (B-CLL phenotype) lymphomas and follicular lymphoma (grade 1 and 2).Methods. 88 patients (42 men and 46 women; average age 52,6±12,5 years) with a diagnosis of NHL were examined,of which 56 people (63,6%) were verified aggressive NHL - diffuse B-large cell lymphoma, immunoblastic variant, in 32patients, indolent NHCL: diffuse B-small cell lymphoma (B-CLL phenotype) - 17 (19,3%) patients, and follicular lymphomagrade 1 and grade 2 - 15 (17,1%) patients. The control group consisted of 177 residents of Novosibirsk, the average age was31,0±12,02 years. The deletions in the GSTM1 and GSTT1 genes were detected by the method of real-time polymerase chainreaction (Real-time PCR) with intercalating fluorescent dye SYBR GreenI and analysis of melting curves.Results. In the present study we investigated the connection with risks of development of individual variants of NHL:diffuse B-large cell lymphoma, diffuse B-small cell (B-CLL) lymphoma and follicular lymphoma grade 1 and grade 2. Itwas revealed the association of GSTM1 0/0 with an increased risk of follicular lymphoma (OR = 3.06, C.I. [1.01-9.32], p<0.039).Conclusion. This data indicate that the xenobiotic metabolizing gene GSTM1 and GSTT1 may play a role in thepathogenesis of certain variants of NHL.