Antigen-independent in vitro expansion of T cells does not affect the T cell receptor V beta repertoire - PubMed (original) (raw)
Comparative Study
Antigen-independent in vitro expansion of T cells does not affect the T cell receptor V beta repertoire
M Arenz et al. J Mol Med (Berl). 1997 Sep.
Abstract
Analysis of the variable chains (V alpha/V beta) 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 V beta 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 V beta 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 V beta molecules in the liver tissue. In contrast to freshly isolated PBMC, no preferential expansion of single TCR V beta 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 V beta repertoire.
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