ABCB1 (MDR1) rs1045642 is associated with increased overall survival in plasma cell myeloma.
Multi-drug resistance (MDR) may compromise the successful management of haematological malignancies, impairing the effectiveness of chemotherapy. The P-glycoprotein (P-gp) drug efflux pump, encoded by the gene ABCB1 (MDR1), is the most widely studied component in MDR. A single nucleotide polymorphism (SNP) has been identified within ABCB1, rs1045642 (C3435T), which may alter P-gp substrate specificity and have an impact on the effectiveness of treatment, and hence overall survival (OS). We estimated the frequency of this SNP in the Northern Irish population and investigated its impact on the OS of patients with plasma cell myeloma (PCM). There was no significant difference in the frequency of rs1045642 between the PCM cohort and an age- and gender-matched control population. Findings within the PCM cohort suggest that rs1045642 genotype influences OS (p = 2 x 10(-2)). If confirmed in larger studies, these results suggest that genotyping rs1045642 may be a useful predictor of outcome in PCM and could indicate modified treatment modalities in certain individuals.
Department of Haematology, Haemato-Oncology Laboratory, Belfast HSC Trust, Belfast City Hospital, Belfast, Northern Ireland, UK.
Stephen
S
Drain
Mark A
MA
Catherwood
Nick
N
Orr
Leeona
L
Galligan
I Maeve
IM
Rea
Clare
C
Hodkinson
Mary B
MB
Drake
Paul J
PJ
Kettle
T C M Curly
TC
Morris
H Denis
HD
Alexander
D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics*; D000483:Alleles; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D009101:Multiple Myeloma / Q000235:genetics* / Q000473:pathology; D009660:Northern Ireland; D020641:Polymorphism, Single Nucleotide
D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1