PMID- 8696448 OWN - NLM STAT- MEDLINE DCOM- 19960904 LR - 20191101 IS - 0958-7578 (Print) IS - 0958-7578 (Linking) VI - 6 IP - 1 DP - 1996 Mar TI - Blood group A antigen expression in platelets is prominently associated with glycoprotein Ib and IIb. Evidence for an A1/A2 difference. PG - 51-9 AB - Blood group ABH antigens are associated with platelets as intrinsic determinants and extrinsically adsorbed antigens, and exist both on glycosphingolipids and on glycoproteins (GPs). We now provide direct evidence that the blood group ABH antigens are prominently associated with platelet GPIb and GPIIb. By immunoprecipitation, a murine monoclonal anti-A antibody precipitated surface-biotin-labelled blood group A1 platelet membrane proteins with electrophoretic characteristics identical to those of GPIb/IX and GPIIb/IIIa. By immunoblotting of SDS-PAGE separated blood group A1 platelet proteins the monoclonal anti-A antibody bound to proteins with electrophoretic characteristics identical to those of GPIb and GPIIb. When immunoaffinity purified GPIb/IX and GPIIb/IIIa, derived from blood group O, A1 and A2 platelets, were employed for immunoblotting, GPIb and GPIIb only from A1 platelets bound the monoclonal anti-A antibody. By ELISA, wherein monoclonal antibodies specific for GPIb (APl) and the GPIIb/IIIa complex (AP2) were used to capture and hold antigens from platelet lysate, human anti-A antibodies reacted with these proteins derived from blood group A1 platelets; proteins from blood group A2, O and B platelets showed no reactivity. These results indicate that blood group A antigen is associated with GPIb and GPIIb derived from blood group A1 but not A2 platelets. FAU - Hou, M AU - Hou M AD - Department of Medicine, Sahlgrenska University Hospital, University of Goteborg, Sweden. FAU - Stockelberg, D AU - Stockelberg D FAU - Rydberg, L AU - Rydberg L FAU - Kutti, J AU - Kutti J FAU - Wadenvik, H AU - Wadenvik H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Transfus Med JT - Transfusion medicine (Oxford, England) JID - 9301182 RN - 0 (ABO Blood-Group System) RN - 0 (Antigens, Human Platelet) RN - 0 (Isoantigens) RN - 0 (Platelet Glycoprotein GPIIb-IIIa Complex) RN - 0 (Platelet Glycoprotein GPIb-IX Complex) SB - IM MH - ABO Blood-Group System/*immunology MH - *Antigens, Human Platelet MH - Blotting, Western MH - Enzyme-Linked Immunosorbent Assay MH - Humans MH - Isoantigens/*blood MH - Platelet Glycoprotein GPIIb-IIIa Complex/*immunology MH - Platelet Glycoprotein GPIb-IX Complex/*immunology MH - Precipitin Tests EDAT- 1996/03/01 00:00 MHDA- 1996/03/01 00:01 CRDT- 1996/03/01 00:00 PHST- 1996/03/01 00:00 [pubmed] PHST- 1996/03/01 00:01 [medline] PHST- 1996/03/01 00:00 [entrez] AID - 10.1046/j.1365-3148.1996.d01-52.x [doi] PST - ppublish SO - Transfus Med. 1996 Mar;6(1):51-9. doi: 10.1046/j.1365-3148.1996.d01-52.x.