Partial chemical characterization of Ia antigens derived from murine thymocytes

B. D. Schwartz, A. M. Kask, S. O. Sharrow, C. S. David, R. H. Schwartz

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Previous chemical studies attempting to demonstrate Ia antigens on mouse thymocytes have given contradictory results. The authors attempted to resolve the question of whether Ia antigens exist on thymocytes (defined as thymus cells that bear a T cell marker) by isolating strain C3H thymocytes free of other contaminating cells using the fluorescence-activated cell sorter, and then chemically testing the purified populations for culture antigens. Immunoglobulin-negative thymus cells and thymus cells selected with a rabbit antiserum to mouse brain were the two populations of thymocytes labeled with [ 3H]leucine after sorting. Radiolabeled proteins were solubilized with the non-ionic detergent Nonidet P-40, reacted with anti-Ia antiserum, and analyzed by electrophoresis on discontinuous sodium dodecyl sulfate/polyacrylamide gels. Ia antigens were recovered from both cell populations. These antigens were synthesized by thymocytes and were found on molecules composed of two chains of molecular weight 33,000 and 25,000, respectively, similar to Ia antigens derived from spleen cells. Assuming that all thymocytes bear similar amounts of Ia antigens, the authors estimated that they have approximately 1/50 the amount of Ia antigens that spleen cells do.

Original languageEnglish (US)
Pages (from-to)1195-1199
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume74
Issue number3
StatePublished - 1977
Externally publishedYes

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Histocompatibility Antigens Class II
Thymocytes
Thymus Gland
Immune Sera
Spleen
Population
Antigens
Leucine
Sodium Dodecyl Sulfate
Detergents
Electrophoresis
Immunoglobulins
Molecular Weight
Fluorescence
Rabbits
T-Lymphocytes
Brain

ASJC Scopus subject areas

  • Genetics
  • General

Cite this

Schwartz, B. D., Kask, A. M., Sharrow, S. O., David, C. S., & Schwartz, R. H. (1977). Partial chemical characterization of Ia antigens derived from murine thymocytes. Proceedings of the National Academy of Sciences of the United States of America, 74(3), 1195-1199.

Partial chemical characterization of Ia antigens derived from murine thymocytes. / Schwartz, B. D.; Kask, A. M.; Sharrow, S. O.; David, C. S.; Schwartz, R. H.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 74, No. 3, 1977, p. 1195-1199.

Research output: Contribution to journalArticle

Schwartz, B. D. ; Kask, A. M. ; Sharrow, S. O. ; David, C. S. ; Schwartz, R. H. / Partial chemical characterization of Ia antigens derived from murine thymocytes. In: Proceedings of the National Academy of Sciences of the United States of America. 1977 ; Vol. 74, No. 3. pp. 1195-1199.
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