| Autor: |
Arenz, Monika, Herzog-Hauff, Sabine, Meyer zum Büschenfelde, Karl-Hermann, Löhr, H. F. |
| Zdroj: |
Journal of Molecular Medicine; Sep1997, Vol. 75 Issue 9, p678-686, 9p |
| Abstrakt: |
Analysis of the variable chains (Vα/Vβ) of the specific T cell receptor (TCR) of organ-infiltrating T cells may provide further insights into the pathogenesis of many infectious diseases, malignancies, and autoimmune disorders. To determine the TCR Vβ repertoire of these small T cell populations antigen-independent in vitro expansion is necessary but may select for certain T cell subpopulations. In this study various antigen independent T cell activation protocols were used to stimulate peripheral blood mononuclear cells (PBMC) of six healthy blood donors, and TCR Vβ molecules were analyzed by flow cytometry and semiquantitative reverse-transcriptase polymerase chain reaction. In addition, the analysis of in vitro expanded liver-infiltrating T cells and autologous peripheral blood T cells derived from five patients with autoimmune hepatitis but none of six controls revealed a selective overexpression of single TCR Vβ molecules in the liver tissue. In contrast to freshly isolated PBMC, no preferential expansion of single TCR Vβ families was observed using phytohemagglutinin, anti-CD3 antibodies, or oxidative stress for antigen-independent T cell activation. In conclusion, antigen-independent T cell activation offers the chance to analyze small populations of organ-infiltrating T cells without skewing the TCR Vβ repertoire. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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