Preparation of Monoclonal Antibody Specific for Incompatible Antibodies Causing Equine Neonatal Isoerythrolysis

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Equine neonatal isoerthrolysis (ENI) caused by incompatibilty of blood group alloantigens between a mare and foal has been detected by the indirect antiglobulin test (coombs test) with polyclonal anti-horse γ-globulinan tibody (pAb). However, since this pAb recognizes not only the incompatible antibodies causing ENI (ENI-causing antibody), but other antibodies specific for blood group as specific antigens, the positivity for antibodies in mare serum becomes higher in routine testing.<br>Although newborn foals of positive mares have been prevented from developing serious icterus diseases by withholding the colostrum for a certain period of time, failure of passive antibody transfer (FPT) is a problem. Accordingly, monoclonalanti-horser-globulinantibodies(MonoclonalAbs) with higher specificity for the ENI-causing antibodies were developed by a cell fusion technique.<br>Forty cell lines which produce Monoclonal Abs specific to horse r-globulin were cloned. The Monoclonal Abs from 19 of these cell lines could specifically hemagglutinate the erthrocytes sensitized with the ENI-causing antibodies. The following panel names were given to the 19 Monoclonal Abs : TS-1-TS-5, TS-8-TS-12, A-1-A-3 and G-1-G-6, respectively. The panel of Monoclonal Abs which showed the strongest affinity for the ENI-causing antibodies were TS-4, TS-10, A-1, A-2 and G -1. As a result of clinical testing to prevent ENI in the past three years, the positive rate for mares in the coombs test with Monoclonal Abs (Monoclonal Ab reagents mixed with TS-4 and TS-10 panels) has been significantly decreased in comparison with the results by pAb. These Monoclonal Abs are available for prohylactic for ENI

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  • 日本畜産学会報

    日本畜産学会報 70 (6), 399-407, 1999

    公益社団法人 日本畜産学会

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