Increased expression of CD40 on thymocytes and peripheral T cells in autoimmunity: a mechanism for acquiring changes in the peripheral T cell receptor repertoire.

  • Authors:
    • D H Wagner
    • E Newell
    • R J Sanderson
    • J H Freed
    • M K Newell
  • View Affiliations

  • Published online on: September 1, 1999     https://doi.org/10.3892/ijmm.4.3.231
  • Pages: 231-273
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Abstract

CD40, a cell surface molecule found on B lymphocytes and other antigen presenting cells, can, when engaged by CD40 ligand (CD40L), induce gene rearrangements and isotype switching. We report here that CD40 is also expressed on thymocytes and on up to 50% of peripheral T cells from autoimmune prone strains of mice. In normal animals, CD40 is present on a small population of T cells and thymocytes. CD40 is expressed on most T cell hybridomas. We demonstrate that CD40 engagement on peripheral T cells, T cell hybridomas and thymocytes results in altered TCRValpha expression. That induced expression of different Valpha's results from the activity of the recombinase gene is implied by the observation that CD40 does not induce TCR changes in RAG knock-out mice. Total cell numbers remained unchanged between anti-CD40 treated and untreated populations of thymocytes or T cells indicating that treatment does not induce cell proliferation or cell death. The data presented here suggest a mechanism by which self reactive T cells accumulate peripherally and independently of selective processes of the thymus.

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Sep 1999
Volume 4 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Wagner D, Newell E, Sanderson R, Freed J and Newell M: Increased expression of CD40 on thymocytes and peripheral T cells in autoimmunity: a mechanism for acquiring changes in the peripheral T cell receptor repertoire.. Int J Mol Med 4: 231-273, 1999
APA
Wagner, D., Newell, E., Sanderson, R., Freed, J., & Newell, M. (1999). Increased expression of CD40 on thymocytes and peripheral T cells in autoimmunity: a mechanism for acquiring changes in the peripheral T cell receptor repertoire.. International Journal of Molecular Medicine, 4, 231-273. https://doi.org/10.3892/ijmm.4.3.231
MLA
Wagner, D., Newell, E., Sanderson, R., Freed, J., Newell, M."Increased expression of CD40 on thymocytes and peripheral T cells in autoimmunity: a mechanism for acquiring changes in the peripheral T cell receptor repertoire.". International Journal of Molecular Medicine 4.3 (1999): 231-273.
Chicago
Wagner, D., Newell, E., Sanderson, R., Freed, J., Newell, M."Increased expression of CD40 on thymocytes and peripheral T cells in autoimmunity: a mechanism for acquiring changes in the peripheral T cell receptor repertoire.". International Journal of Molecular Medicine 4, no. 3 (1999): 231-273. https://doi.org/10.3892/ijmm.4.3.231