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【Objective】 To analyze the allele frequencies of the human platelet antigens 1-29 system (HPA-1-29bw) in Nanjing Han platelet donors, so as to provide references for compatible platelet transfusion. 【Methods】 HPA genotyping was performed by Sanger sequencing method in 900 Nanjing Han regular platelet donors who donated at Jiangsu Province Blood Center from February to September 2019. The frequencies of alleles and genotype were calculated using direct counting method. 【Results】 The HPA allele frequencies in Nanjing Han platelet donors were HPA-1a 0.9950, 1b 0.0050, 2a 0.9467, 2b 0.0533, 3a 0.5850, 3b 0.4150, 4a 0.9989, 4b 0.0011, 5a 0.9822, 5b 0.0178, 6a 0.9828, 6b 0.0172, 11a 0.9994, 11b 0.0006, 15a 0.5317, 15b 0.4683, 21a 0.9928 and 21b 0.0072, respectively. Only a allele was detected in HPA-7-10w, -12-14w, -16-20w and -22-29bw systems.The highest mismatch rate of HPA genes in 900 platelet donors was HPA-15 system, followed by HPA-3 system, with the rate of 37.40%(337/900) and 36.77%(331/900), respectively. One heterozygote was detected in HPA-11w system. 【Conclusion】 The chracteristics of HPA alleles frequencies in Nanjing Han platelet donors is that HPA-15 and HPA-3 are the most common heterozygotes, which should be paid attention to in local clinical transfusion.
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Objective To investigate the effect of HPA gene polymorphism and its alleles on platelet transfusion.Methods From January 2015 to January 2017,50 patients suffered from Platelet transfusion refractoriness were collected as an observation group while 50 patients without Platelet transfusion refractoriness were collected as a control group.The HPA gene polymorphism of the both groups were compared.Results When compared with the control group,the HPA type coincidence rate of Donor and recipient in the observation group decreased significantly (4.00％ vs.82.00％,P =0.000).And patients in the observation group got decreased levels of percent platelet recovery and platelet corrected growth index.(HPA16,9,15) were common in both groups.However,aa,ab and bb of the HPA-2 allele got 37,8 and 5 cases in the observation group,while there were 48,2 and 0 cases in the control group (P=0.007).And aa,ab and bb of the HPA-3 allele got 33,9 and 8 cases in the observation group,while there were 46,3 and 1 cases in the control group (P =0.005).Moreover,aa,ab and bb of the HPA-15 allele got 35,8 and 7 cases in the observation group,while there were 47,2 and 1 cases in the control group (P =0.007).Homozygous aa were the most common gene type in the donors of the both groups,and the difference was no statistically significant (P＞0.05).As aa,ab and bb of the HPA-2,3 change,the percent platelet recovery and platelet corrected growth index both decreased (P＜0.05).Conclusion Platelet transfusion refractoriness is related to HPA gene polymorphism,and allele b may be the cause of platelet transfusion refractoriness.
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Objective To investigate the allele polymorphism and characteristic of HPA-1-17 genotyping of Li ethnic on Hainan island,and to evaluate the HPA mismatched ratio between donor and recipient in randomly chosen cases of blood transfusion,in order to investigate the platelet transfusion refractoriness in Li population.Methods Genotyping tests of A-1—17 allele of the blood sample from 180 Lis were conducted with PCR-SSP.Results A total of 180 blood samples were genotyped successfully in HPA genetic system,among which 0.9972 were HPA-2a,0.0028 were HPA-2b,0.4889 were HPA-3a,0.5111 were HPA-3b,0.9667 were HPA-5a,0.0333were HPA-5b,0.9972 were HPA-6a,00028 were HPA-6b,0.4250 were HPA-15a,0.05750 were HPA-15b,and they all showed polymorphism. But polymorphism was not detected out in other allelic genes,such as HPA-1,-4,-7—14,-16,and -17. The bb homozygous were detected in two alleles,among which 0.2834 was HPA-3 and 0.3667 was HPA-15,but it wasn't detected in the others systems. In the randomly chosen cases of blood transfusion,the mismatch rate of HPA-3 ,HPA-15 and HPA-5 was 37.49%,36.93% and 6.23%,respectively.Conclusion This research revealed the distribution of HPA gene in Li population on Hainan island,and found the allelic frequency and thier characteristics. According to our findings,HPA-2,HPA-3,HPA-5 and HPA-15 genes between donor and recipient should be matched in order to avoid platelet transfusion refractoriness.