Frequency of human platelet antigens (HPA)-1, -2, -5 and -15 in Brazilian blood donors and establishment of a panel of HPA-typed donors

C M B Mangerona, F B Garcia, H Moraes-Souza
Transfusion Medicine 2015, 25 (3): 189-94

OBJECTIVES: The aim of this study is to keep a record of regular human platelet antigens (HPA)-typed blood donors and to compare their allele frequencies with those reported in other populations.

BACKGROUND: HPA are polymorphisms expressed on platelet membrane glycoproteins. They can generate an immune response leading to platelet alloimmunisation that may show clinical manifestations, such as neonatal alloimmune thrombocytopenia, post-transfusion purpura and platelet refractoriness. Platelet alloimmunisation is not uncommon, therefore, for an optimum management, it is advantageous to establish a panel of typed platelets to help matched platelets selection in HPA-alloimmunised patients transfusion.

METHODS: The polymerase chain reaction (PCR)-allele-specific primers and PCR-restriction fragment length polymorphism methods were used to determine the genotypes of HPA-1, -2, -5 and -15 systems of 337 blood donors.

RESULTS: The three genotypes (AA, AB and BB) were found in all HPA systems analysed, and the most frequent genotypes were AA for HPA-1, -2 and -5 systems (mean: 0·732) and AB for HPA-15 system (mean: 0·523). Allele frequencies were 0·148, 0·155, 0·140 and 0·430 for HPA-1b, -2b, -5b and -15b, respectively, and they were similar to those found in Caucasian populations, especially for HPA-1. However, the B allele was more frequent in all HPA systems when compared with Amazon Indians, and the frequency of the B allele in our study was higher in HPA-1 and -15 systems and lower in HPA-2 and -5 systems in comparison with sub-Saharan African populations.

CONCLUSIONS: A record of HPA-typed donors would enable rapid identification and selection of donors when HPA-compatible platelets are required for transfusion.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"