Impact of hHLA-DPB1 matching on clinical outcomes after haploidentical-related hematopoietic stem cell transplantation
Rev. invest. clín
; 72(2): 69-79, Mar.-Apr. 2020. tab, graf
Article
in En
| LILACS
| ID: biblio-1251837
Responsible library:
BR1.1
ABSTRACT
ABSTRACT Background:
The impact of HLA-DPB1 compatibility and its role as a transplantation antigen in haploidentical-related hematopoietic stem cell transplant (haplo-R-HSCT) have not been established, and a negative effect on survival has been suggested.Objective:
The objective of the determine was to study the frequency and clinical effects of incompatibility at the HLA-DPB1 locus in the haplo-R-HSCT setting.Methods:
Clinical records and electronic files of 91 patients with a hematological disease who underwent haplo-HSCT from January 2009 to October 2017 in a university medical center were scrutinized. Overall survival (OS) was estimated by the Kaplan-Meier method; the cumulative incidence of transplant-related mortality (TRM) and relapse rates was determined. Acute graft-versus-host disease was assessed by binary logistic regression. Cox regression model with a 95% confidence interval was used to examine the association between the different variables and their effect on OS.Results:
Of the 91 donor-recipient pairs, 24 (26.37%) shared complete DPB1 identity, 60 (65.93%) had a mismatch at one allele, and 7 (7.70%) were mismatched at two alleles. Twenty-four different HLA-DPB1 alleles were found; the most frequent were DPB1*0401 (34.1%) and DPB1*0402 (27.5%). Two-year OS, the cumulative incidence of TRM and relapse was 51.3 ± 6.8%, 28 ± 6% and 60 ± 7.8% for all haplo-related transplants, respectively, with no statistical difference between HLA-DPB1 matched and partially matched patients. In Cox regression analysis, no risk factors associated with OS, TRM, or relapses were identified.Conclusion:
HLA-DPB1 mismatching in the haplo-R-HSCT setting did not influence transplant outcomes and was clinically tolerable. A high degree of homozygosity was found.Key words
Full text:
1
Index:
LILACS
Main subject:
Hematopoietic Stem Cell Transplantation
/
HLA-DP beta-Chains
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Transplantation, Haploidentical
/
Hematologic Diseases
Type of study:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limits:
Adolescent
/
Adult
/
Child
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Child, preschool
/
Female
/
Humans
/
Infant
/
Male
Language:
En
Journal:
Rev. invest. clín
Journal subject:
MEDICINA
Year:
2020
Type:
Article