The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 1989
Filed:
Dec. 01, 1986
Robert McMillan, Del Mar, CA (US);
Scripps Clinic and Research Foundation, La Jolla, CA (US);
Abstract
Chronic immune thrombocytopenic purpura is due to platelet destruction by circulating anti-platelet antibody. Although autoantibodies against the platelet glycoprotein IIb/IIIa complex and glycoprotein Ib have been demonstrated using various methods, practical assays for detection of platelet-associated or plasma autoantibodies have not been available. I studied 44 patients with chronic immune thrombocytopenic purpura where platelet-associated and plasma autoantibodies against the glycoprotein IIb/IIIa complex and glycoprotein Ib were measured using a newly developed immunobead assay and a previously reported microtiter well assay. Platelet-associated autoantibody was detected using the immunobead assay in nine of 11 patients (81.8%; seven with anti-GPIIb/IIIa, two with anti-GPIb). Plasma autoantibodies were noted in 28 of 44 patients (63.6%; 19 with anti-GPIIb/IIIa, seven with anti-GPIb and two with both). Positive results were noted in 24 of 44 patients using the immunobead assay and in only 12 of 44 using the microtiter well assay, suggesting that solubilization of the platelets prior to antibody addition, as in the microtiter well assay, alters epitope stability. Of the 20 thrombocytopenic control patients studied, all gave negative results using both assays. I conclude that these assays allow detection of autoantibodies in the majority of patients with chronic immune thrombocytopenic purpura confirming the presence of an autoimmune process. In addition, the two assays may differentiate between epitope types.