title: The role of ABC-transporter gene polymorphisms in chemotherapy induced immunosuppression, a retrospective study in childhood acute lymphoblastic leukaemia.
abstract: We examined the association of functional ABCB1 (MDR1) and ABCG2 (BCRP) polymorphisms with acute side effects of chemotherapy. Analyses were performed on clinical data from 138 patients treated with the ALL-BFM-95 protocol implying several substrates of these transporters. ABCB1 3435T>C, 2677G>T/A 1236C>T and ABCG2 421C>A genotypes were determined. A higher proportion of ABCB1 3435TT patients suffered excessive infectious complications than those harbouring at least one C allele (OR=2.5, p=0.03) during the whole half-year-long intensive phase of chemotherapy. Weaker associations were calculated when ABCB1 1236T-2677T-3435T haplotype homozygotes were tested against the remaining part of the population (OR=2.3, p=0.09). During the reinduction phase of therapy, the occurrence of severe leukocytopenia was similar among ABCB1 genotype groups. The frequency of any toxicities were not shown to differ according to the ABCG2 421C>A genotype. Our data suggest that the ABCB1 3435T>C genotype is associated with the infectious complications of the applied chemotherapy regimen.
authors: Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary.
authors: Dániel J
authors: DJ
authors: Erdélyi
authors: Eniko
authors: E
authors: Kámory
authors: Anna
authors: A
authors: Zalka
authors: Agnes F
authors: AF
authors: Semsei
authors: Béla
authors: B
authors: Csókay
authors: Hajnalka
authors: H
authors: Andrikovics
authors: Attila
authors: A
authors: Tordai
authors: Gábor
authors: G
authors: Borgulya
authors: Edina
authors: E
authors: Magyarosy
authors: Ilona
authors: I
authors: Galántai
authors: György
authors: G
authors: Fekete
authors: András
authors: A
authors: Falus
authors: Csaba
authors: C
authors: Szalai
authors: Gábor T
authors: GT
authors: Kovács
mesh_terms: D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters / Q000235:genetics* / Q000276:immunology*; D000293:Adolescent; D000970:Antineoplastic Agents / Q000009:adverse effects* / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D005838:Genotype; D006801:Humans; D007223:Infant; D009363:Neoplasm Proteins / Q000235:genetics* / Q000276:immunology*; D009894:Opportunistic Infections / Q000276:immunology; D027361:Organic Anion Transporters / Q000235:genetics* / Q000276:immunology*; D020641:Polymorphism, Single Nucleotide; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000188:drug therapy* / Q000235:genetics / Q000276:immunology*; D012189:Retrospective Studies
chemical_list: C513055:ABCB1 protein, human; C116614:ABCG2 protein, human; D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters; D000970:Antineoplastic Agents; D009363:Neoplasm Proteins; D027361:Organic Anion Transporters