Serological Studies on the Major Histocompatibility Complex of New Inbred Strains of the Guinea Pig1

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  • CHIBA Joe
    Department of Pathology and Veterinary Science National Institute of Health
  • OTOKAWA Minoru
    Department of Pathology and Veterinary Science National Institute of Health
  • NAKAGAWA Masao
    Department of Pathology and Veterinary Science National Institute of Health
  • EGASHIRA Yasuyuki
    Department of Pathology and Veterinary Science National Institute of Health

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  • Serological Studies on the Major Histocompatibility Complex of New Inbred Strains of the Guinea Pig
  • Serological Studies on the Major Histoc

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New inbred strains of guinea pigs, JY 1, JY 2, JY 3, JY 6, JY 9 and JY 10 have been established in this Institute. Serologic studies of guinea pig leukocyte antigens (GPLA antigens) were carried out in order to examine their major histocompatibility complex (GPLA complex). Antisera specific for Ia antigens were raised by cross-immunization of NIH strain 2 (NIH 2) and NIH strain 13 (NIH 13) guinea pigs, well known inbred guinea pigs. The sera identified four distinct Ia specificities, which were designated as Ia.2a, Ia.2b, Ia.13a and Ia.13b. Six antigenic specificities different from the above Ia specificities were identified by sera obtained by appropriate immunization of the inbred guinea pigs and were designated as P.1, P.2, P.3, P.4, P.5 and P.6. Antigenic specificities of GPLA antigens recognized in inbred guinea pigs were : NIH 2 (Ia.2a, Ia.2b, P.1, P.2, P.3, P.4), NIH 13 (Ia.13a, Ia.13b, P.1, P.2, P.3, P.4), JY 1 (Ia.13a, Ia.13b, P.5), JY 2 (Ia.2b, Ia.13b, P.3, P.4, P.6), JY 3 (Ia.13a, Ia.13b, P.2, P.4, P.5), JY 6 (Ia.2b, Ia.13b, P.3, P.6), JY 9 (Ia.13a, Ia.13b, P.4, P.5), JY 10 (Ia.13a, Ia.13b, P.2, P.3, P.4, P.6). The correspondence of these specificities to those already reported was discussed and the P.2 or P.4 was considered to be an additional specificity of GPLA antigens that have not been reported yet. As the new inbred strains of guinea pigs were thus found to possess characteristic GPLA complex, which differ from each other and from those of NIH 2 and NIH 13 strain, they should be useful for studies of roles of the major histocompatibility complex in the immune system.

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