Abstract
Multiple drug resistance 1 (MDR1) gene encodes P-glycoprotein (P-gp), an ATP-dependent drug efflux pump that protects the cells from a wide range of drugs. Several single nucleotide polymorphisms (SNPs) have been linked with the structural and functional aspect of P-gp and with the predisposition to multiple myeloma. Two hundred thirty-one MM patients and 244 healthy controls were included in the present investigation. MDR1 gene polymorphisms (rs1045642, rs1128503 and rs2032582) were genotyped by TaqMan SNP detection assay. Relative expression of the MDR1 gene was quantified by RT-PCR. Distribution of genotypes and alleles of MDR1 gene polymorphisms (rs1045642, rs1128503 and rs2032582) among the MM patients and healthy controls were comparable. TT genotype and minor allele “T” of MDR1 rs1045642 polymorphism were more frequent in survivors than those who died during the follow-up period of 5 years (TT: OR = 0.37, p = 0.01, T: OR = 0.59, p = 0.007). Relative expression of the MDR1 gene was higher in MM patients than in controls (p < 0.0001). MDR1 polymorphisms (rs1045642) were associated with the expression of MDR1 in MM patients and controls. Survival analysis revealed a significant association of the TT genotype with protection from MM death with standard treatment compared to those with the CC genotype. TT genotype of MDR1 rs1045642 polymorphism is associated with lower MDR1 expression and a protective genotype against MM patients’ mortality.
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Cai, H., Xu, X., Ji, H. et al. MDR1 rs1045642 Variant Is Linked with Lower Expression and Extends Overall Survival of Multiple Myeloma: A Hospital-Based Case-Control Study. Russ J Genet 59, 1233–1240 (2023). https://doi.org/10.1134/S1022795423110121
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DOI: https://doi.org/10.1134/S1022795423110121