Gene frequencies of the HPA-15 (Gov) platelet alloantigen system in Brazilians

The HPA‐15 (Gov) alloantigen is a biallelic co‐dominant system on human platelets, and its allele HPA‐15a and HPA‐15b differ by an A→C single nucleotide polymorphism at nucleotide 2108 of the coding sequence resulting in a Tyr682Ser substitution in the mature CD109 glycoprotein. Employing the polyme...

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Published in:	Transfusion medicine (Oxford, England) Vol. 14; no. 6; pp. 433 - 437
Main Authors:	Cardone, J. D. B., Chiba, A. K., Boturão-Neto, E., Vieira-Filho, J. P. B., Bordin, J. O.
Format:	Journal Article
Language:	English
Published:	Oxford, UK; Malden, USA Blackwell Science Ltd 01-12-2004
Subjects:	Alleles alloimmunization Amazon Indians Amino Acid Substitution - genetics Antigens, CD - genetics Antigens, Human Platelet - genetics blood donors Brazil Gene Frequency - genetics genotyping GPI-Linked Proteins Humans Neoplasm Proteins platelet antigens Polymorphism, Single Nucleotide - genetics Brazil
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Summary:	The HPA‐15 (Gov) alloantigen is a biallelic co‐dominant system on human platelets, and its allele HPA‐15a and HPA‐15b differ by an A→C single nucleotide polymorphism at nucleotide 2108 of the coding sequence resulting in a Tyr682Ser substitution in the mature CD109 glycoprotein. Employing the polymerase chain reaction‐restriction fragment length polymorphism technique, we determined the HPA‐15 gene frequencies among 276 subjects of distinct Brazilian ethnic groups including, 15 Caucasians, 15 African Brazilians, 15 Orientals, 106 Amazon Xikrin Indians, 31 Amazon Gaviões Indians and 94 blood donors. The calculated HPA‐15a and HPA‐15b allele frequencies found in Caucasians (0.53/0.47), African Brazilians (0.57/0.43), Orientals (0.57/0.43) and Brazilian blood donors (0.52/0.48) did not differ significantly. However, the HPA‐15a and HPA‐15b gene frequencies of Xikrin Indians (0.78/0.22) were significantly different from that of all other groups (P < 0·01). The HPA‐15a/a, HPA‐15a/b and HPA‐15b/b genotype frequencies observed in Gaviões Indians were significantly different from those seen in African Brazilians (P = 0·04) and blood donors (P = 0·017). The present data showed that the distribution of the HPA‐15 (Gov) system alleles observed among the Brazilian population is quite similar to the distributions already reported among Asian, Canadian and European populations. Moreover, the data indicated differences in the frequency of the HPA‐15 system between Amazon Indians and other distinct Brazilian ethnic groups suggesting that Amerindians would be at higher risk of HPA‐15 alloimmunization in the need of receiving blood components collected from blood donors of other ethnic groups.
Bibliography:	ArticleID:TME539 istex:044532E599DF8A5AAA43140EA1DCA3EF7E75F05A ark:/67375/WNG-GHDVLWZM-K ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0958-7578 1365-3148
DOI:	10.1111/j.1365-3148.2004.00539.x