en عمومى General پژوهشي Research <div><strong>Background: </strong>Human platelet antigens (HPAs) are part of platelet GP complexes have the potential to contribute to the autoantibody production. Moreover, these antigens demonstrate different patterns of distribution on different ethnic groups and variation in some types of diseases. This study was objected to determine the incidence of HPA-1 to -5 and -15 polymorphisms in the Iranians suffering from primary Immune thrombocytopenic purpura (ITP).&nbsp;<br> <strong>Materials and Methods: </strong>In this case-control investigation, 30 patients by definite primary ITP were randomly selected and enrolled in the study. HPA genotyping was performed implicating by the Single Specific Primer PCR (SSP-PCR). For the control group, data of recently published gene polymorphism among Iranian Blood donors were deployed for comparison.&nbsp;<br> <strong>Results: </strong>The incidence of HPA-1 to -5 and -15 polymorphisms in the Iranian patients with primary ITP was found to be: HPA-1a/1a: 0.933, HPA-1a/1b: 0.067, HPA-2a/2a: 0.133, HPA-2a/2b: 0.867, HPA-3a/3a: 0.2, HPA-3a/3b: 0.533, HPA-3b/3b: 0.267, HPA-4a/4a: 1, HPA-5a/5a: 0.967, HPA-5a/5b: 0.330, HPA-15a/15a: 0.166, HPA-15a/15b: 0.667 & HPA-15b/15b: 0.167.&nbsp;&nbsp;<br> <strong>Conclusion: </strong>This study provides special new data on the distribution of HPA allele among the Iranians ITP patients.Furthermore, it might useful toccharacterize understanding more presizely about ITP and HPA distribution. However, further studies concerning platelet immunology are needed to do help on best practice on management of immune diseases triggered by platelet antibodies.&nbsp;&nbsp;&nbsp;</div> Antigens, Blood Platelets, Human Platelet, Purpura, Thrombocytopenic 41 50 http://ijpho.ssu.ac.ir/browse.php?a_code=A-10-106-1&slc_lang=en&sid=1 Mojgan Shaiegan mojganshaiegan@yahoo.com 0000-0002-9564-1390 No Blood Transfusion Research Center /High Institute for Research & Education in Transfusion Medicine, Immunohematology Department, Tehran, Iran Blood Transfusion Research Center /High Institute for Research & Education in Transfusion Medicine, Immunohematology Department, Tehran, Iran Ali Ghasemi a.qasemi2012@yahoo.com No Department of Biochemistry and Hematology, Faculty of Medicine Semnan University of Medical Sciences, Semnan, Iran Department of Biochemistry and Hematology, Faculty of Medicine Semnan University of Medical Sciences, Semnan, Iran Maryam Zadsar maryam.zad@gmail.com 0000-0001-9519-4853 Yes Blood Transfusion Research Center/High Institute for Research & Education in Transfusion Medicine/Microbiology Department, Tehran, Iran Blood Transfusion Research Center/High Institute for Research & Education in Transfusion Medicine/Microbiology Department, Tehran, Iran Jahangir Ahmadi maryam_zad@yahoo.com No Iranian Blood Transfusion Organization Research Center, Tehran, Iran Iranian Blood Transfusion Organization Research Center, Tehran, Iran Shahram Samiee shsamie@yahoo.com No Iranian Blood Transfusion Organization Research Center, Tehran, Iran Iranian Blood Transfusion Organization Research Center, Tehran, Iran Tahereh Madani trth-madani@yahoo.com 0000-0003-0159-1853 No Iranian Blood Transfusion Organization Research Center, Tehran, Iran Iranian Blood Transfusion Organization Research Center, Tehran, Iran