| 摘要 |
A method of inhibiting platelet transfusion refractoriness comprising administering third-party platelets to a patient whose platelet glycoprotein Ib alpha polypeptides expressed from the patient's DNA have been determined to have either threonine or methionine residues, or both, at amino acid residue position 145 thereof, the third-party platelets having expressed at residue position 145 of the glycoprotein Ib alpha polypeptide thereof amino acids that are the same as those expressed on the glycoprotein Ib alpha polypeptides of the patient's platelets. Also, an antibody, or a fragment thereof, in substantially pure form having as its target epitope a domain of glycoprotein Ib alpha , the affinity of the antibody, or fragment thereof, for said epitope being dependent on the identity of the amino acid residue at position 145 of the glycoprotein. In addition, in a process for storing a supply of platelets for therapeutic use in a patient, the improvement comprising segregating the platelets into three stocks dependent upon whether residue 145 of glycoprotein Ib alpha polypeptides of the platelets includes: (A) threonine; (B) methionine; or (C) both threonine and methionine. Also, a method of immunoassay comprising contacting a sample of blood, or a composition derived therefrom, with alloantigenic Thr or Met145 form of glycoprotein Ib alpha , or a fragment thereof, containing the Thr/Met145 locus, and determining whether there is present a complex of antibody and a form of the glycoprotein or a fragment thereof. |
