title: [Impact of donor KIR2DS5 genotype on outcome following haploidentical hematopoietic stem cell transplantation].
abstract: The aim of this study was to evaluate the impact of donor killer cell immunoglobulin-like receptor (KIR) and recipient HLA genotypes on outcome following haploidentical hematopoietic stem cell transplantation (HSCT). 26 patients with hematologic diseases received non T-cell-depleted (TCD) in vitro transplant from haploidentical donor. Donor/recipient HLA and donor KIR genotypes were determined by polymerase chain reaction-sequence-specific primer (PCR-SSP). Donor/recipient KIR/HLA subgroup was assessed by donors KIR and recipients HLA-Bw4, Cw1 group and Cw2 group alleles. Hematopoietic reconstitution, incidence of graft versus host disease (GVHD), disease-free survival (DFS), infection and transplant-related mortality (TRM) were analyzed between every two groups. The influence of donor activating KIR on outcome following haploidentical HSCT also has been studied. The results showed that hematopoietic reconstitution, incidence of GVHD, DFS, infection and TRM were not significantly different between every two groups (p>0.05). There were 4 cases of severe GVHD in C2 mismatched group. The donor activating KIR2DS5 positive group had higher 2-year DFS compared with the negative group [(85.7+/-13.2)% vs (31.2+/-12.8)%, p<0.05]. It is concluded that KIR/HLA genotypes between donor and recipient influence the outcome following haploidentical HSCT. Donor activating KIR2DS5 may improve DFS in non TCD haploidentical HSCT.
authors.affiliation: Institute of Hematology & Blood Disease Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: He
authors.forename: He-Hua
authors.initials: HH
authors.lastname: Wang
authors.forename: Mei
authors.initials: M
authors.lastname: Wang
authors.forename: Wen-Jing
authors.initials: WJ
authors.lastname: Zhai
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zhou
authors.forename: Rong-Li
authors.initials: RL
authors.lastname: Zhang
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Zhai
authors.forename: Si-Zhou
authors.initials: SZ
authors.lastname: Feng
authors.forename: Ming-Zhe
authors.initials: MZ
authors.lastname: Han
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D018572:Disease-Free Survival; D005260:Female; D005838:Genotype; D006086:Graft vs Host Disease / Q000235:genetics; D006238:Haploidy; D018380:Hematopoietic Stem Cell Transplantation / Q000379:methods*; D006801:Humans; D007938:Leukemia / Q000628:therapy*; D008297:Male; D054340:Receptors, KIR / Q000235:genetics*; D014019:Tissue Donors; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: C531595:KIR2DS5 protein, human; D054340:Receptors, KIR