The Presence of the li Blood Group System on Human Platelets
Open Access
- 1 July 1984
- journal article
- research article
- Published by Oxford University Press (OUP) in American Journal of Clinical Pathology
- Vol. 82 (1), 74-77
- https://doi.org/10.1093/ajcp/82.1.74
Abstract
To examine platelets for the Ii antigens, high-titer human IgM anti-I and anti-i antibodies were affinity purified, radiolabeled with 125I, and incubated with adult and cord platelets. Saturation binding curves were performed by incubating adult platelets with serial dilutions of concentrated 125I-anti-I. Inhibition binding curves were performed by incubating adult platelets with doubling dilutions of concentrated unlabeled anti-I mixed with 125I-labeled anti-I. Adult platelets bound significantly more anti-I than antii, while cord platelets bound more anti-i than anti-I (P < 0.025). Both anti-I and anti-i show a temperature-dependent dose-response curve of maximum binding at 4°C. Binding of 125I-labeled anti-I was inhibited by preincubation with 100-fold concentration of unlabeled anti-I. The authors conclude that platelets express I/i antigens in parallel with that of red blood cells.Keywords
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