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Increased Risk of Acute Lymphoblastic Leukemia in Adult Patients with GSTM1 Null Genetic Polymorphism

Author name : FEHAID MAZYAD AWADH ALANAZI
Publication Date : 2019-11-22
Journal Name : DOVE MEDICAL PRESS LTD

Abstract

Purpose: Glutathione S-transferases (GSTT1 and GSTM1) detoxify various endogenous and exogenous compounds and provide
cytoprotective role against reactive species. This study aimed to assess the frequency of GSTT1, and GSTM1 polymorphisms in newly
diagnosed Sudanese adult patients with acute lymphoblastic leukemia (ALL) and to evaluate the association of these polymorphisms
with age, gender and type of ALL.
Patients and Methods: This case–control study included 128 adult Sudanese, untreated newly diagnosed patients with ALL, aged
18 to 74 years and 128 age-gender matched healthy controls. Deletional polymorphisms of GSTT1 and GSTM1 genes were genotyped
through a multiplex polymerase chain reaction (PCR) assay using β-globin gene as an internal positive control.
Results: The genotypic frequency of GSTT1 null polymorphism was 22.7% in cases and 14.8% in controls (OR = 1.68, P = 0.111).
Statistically significant differences were noted in the frequencies of GSTM1 null polymorphism in cases and controls (OR = 3.7, P = <0.001).
Combined GSTT1 null and GSTM1 null gene polymorphisms showed statistically significant difference in patients with ALL as compared to
controls (OR = 6.5, CI 95% = 1.42–29.74, P < 0.001).
Conclusion: Irrespective of age at diagnosis, gender, and phenotype of ALL, GSTM1 null polymorphism either alone or in
combination with GSTT1 null polymorphism poses significantly increased risk of developing ALL in adults.

Keywords

Keywords: GSTT1, GSTM1, polymorphism, acute lymphoblastic leukemia

Publication Link

https://doi.org/10.2147/PGPM.S356302

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