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A detailed serological analysis of a xenogeneic anti-Ia serum

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Abstract

Rabbit anti-mouse-Ia serum was raised against Ia specificities present in CBAJH (H-2 k) serum. This xenogeneic antiserum was considered to react with similar specificities to those detected by mouse anti-Iak alloantisera and more evidence is now presented for this contention. By absorption, the xenogeneic antiserum was found to react with spleen, lymph node, bone marrow, and thymus, reactions similar to that found with the allogeneic anti-Iak antiserum. Furthermore, red cells, platelets, brain, kidney, and liver could not absorb the activity from the xenogeneic antiserum, demonstrating the selective tissue distribution of the antigens reactive with this serum. This reactive population was previously shown to consist of B cells and a subpopulation of T cells. In a backcross study of (C57BL/6 × A)F1 × C57BL/6, the rabbit anti-Ia and mouse anti-Ia reactions were found to segregate together, and some evidence for the genetic regulation of the expression of Ia specificities was also found. By direct testing, and by absorption testing using a number of strains, the xenogeneic antiserum was shown to contain high titers of antibody to Ia.1′, 3′, 7′, 15′, and 17′; lower titers to Ia.19′, and 22′; little antibody to Ia.18′, and no reaction for the private specificity Ia. 2, although the multiple absorptions required to define these specificities may have observed some reactions. The data indicate that the xenogeneic and allogeneic anti-Iak antisera recognize similar Ia determinants, which map to theLA, IE andIC subregions of theH-2 complex. These have been given the same specificity designation as the allogeneic specificities, but they are separately identified by a prime (').

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Authors and Affiliations

  1. Department of Microbiology, John Curtin School of Medical Research, Australian National University, ACT 2601, Canberra, Australia

    Christopher R. Parish

  2. Department of Medicine, Austin Hospital, 3084, Heidelberg, Victoria, Australia

    Ian F. C. McKenzie

Authors
  1. Christopher R. Parish
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  2. Ian F. C. McKenzie
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Parish, C.R., McKenzie, I.F.C. A detailed serological analysis of a xenogeneic anti-Ia serum. Immunogenetics 6, 183–196 (1978). https://doi.org/10.1007/BF01563908

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  • DOI: https://doi.org/10.1007/BF01563908

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