PMID- 33166416 OWN - NLM STAT- MEDLINE DCOM- 20210714 LR - 20210714 IS - 1537-2995 (Electronic) IS - 0041-1132 (Linking) VI - 61 IP - 3 DP - 2021 Mar TI - Minor impact of patient alloantibodies against human platelet antigen (HPA)-15 in the effectiveness of platelet transfusion: A pilot study. PG - 738-743 LID - 10.1111/trf.16181 [doi] AB - BACKGROUND: Alloantibodies against human platelet antigen (HPA)-15 are sometimes detected in patients with platelet transfusion refractoriness (PTR); however, little is known about their impact on PTR. STUDY DESIGN AND METHODS: Two patients who possessed HPA-15 alloantibodies (Patient 1, anti-HPA-15b; Patient 2, anti-HPA-15a) and human leukocyte antigen (HLA) antibodies were enrolled. The efficacy of HPA-15-compatible vs -incompatible platelet transfusion was compared by focusing on ABO- and HLA-matched transfusions on the basis of the 24-hour corrected count increment (CCI-24 hours) for platelets. The titers of HPA-15 antibodies in the patients' sera were also monitored. RESULTS: The patients received 71 and 12 ABO-compatible, HLA-matched platelet transfusions, respectively, during the monitoring periods. Among these transfusions, CCI-24 hours could be calculated in 27 and 10 transfusions, respectively, and the HPA-15 genotype of the donors was determined. There were no significant differences in the CCI-24 hours between the HPA-15 compatible and incompatible transfusions in both patients (P = .30 and .56, respectively, Mann-Whitney U test). There was no significant change in the HPA-15b antibody titer in Patient 1 during the monitoring period, while the HPA-15a antibody level in Patient 2 was undetectable at the end of the monitoring period, although the titer was low at the beginning. CONCLUSION: The efficacy of HPA-15-incompatible platelet transfusions was not necessarily inferior to that of HPA-15 compatible ones. Although the case number was limited, our results suggest that HPA-15 antibodies do not have a significant impact on the effects of platelet transfusion. CI - (c) 2020 AABB. FAU - Inoue, Hiroko AU - Inoue H AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Sakamoto, Rumi AU - Sakamoto R AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Nishimiya, Hiroko AU - Nishimiya H AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Sakamoto, Hiroe AU - Sakamoto H AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Terasu, Shota AU - Terasu S AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Aminaka, Ryota AU - Aminaka R AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Koh, Yangsook AU - Koh Y AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Takihara, Yoshihiro AU - Takihara Y AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Hirayama, Fumiya AU - Hirayama F AUID- ORCID: 0000-0001-6518-2085 AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. FAU - Kuroishi, Ayumu AU - Kuroishi A AUID- ORCID: 0000-0002-5940-0071 AD - Japanese Red Cross Kinki Block Blood Center, Ibaraki, Japan. LA - eng PT - Case Reports PT - Journal Article DEP - 20201109 PL - United States TA - Transfusion JT - Transfusion JID - 0417360 RN - 0 (Antigens, CD) RN - 0 (Antigens, Human Platelet) RN - 0 (CD109 protein, human) RN - 0 (GPI-Linked Proteins) RN - 0 (Isoantibodies) RN - 0 (Neoplasm Proteins) SB - IM MH - Aged MH - Antigens, CD/blood/*immunology MH - Antigens, Human Platelet/*immunology MH - Blood Group Incompatibility MH - Female MH - GPI-Linked Proteins/blood/immunology MH - Humans MH - Isoantibodies/*blood/immunology MH - Japan MH - Leukemia, Myeloid, Acute/blood/*immunology MH - Male MH - Middle Aged MH - Myelodysplastic Syndromes/blood/*immunology MH - Neoplasm Proteins/blood/*immunology MH - Pilot Projects MH - *Platelet Transfusion/adverse effects MH - Statistics, Nonparametric OTO - NOTNLM OT - human platelet antigen-15 OT - platelet transfusion OT - refractoriness EDAT- 2020/11/10 06:00 MHDA- 2021/07/15 06:00 CRDT- 2020/11/09 17:13 PHST- 2020/10/12 00:00 [revised] PHST- 2020/08/15 00:00 [received] PHST- 2020/10/12 00:00 [accepted] PHST- 2020/11/10 06:00 [pubmed] PHST- 2021/07/15 06:00 [medline] PHST- 2020/11/09 17:13 [entrez] AID - 10.1111/trf.16181 [doi] PST - ppublish SO - Transfusion. 2021 Mar;61(3):738-743. doi: 10.1111/trf.16181. Epub 2020 Nov 9.