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[Immunologic, alloantigen-dependent factors in chronic graft rejection]
C Barth1, J Stachowski, A von Menges
1Klinik IV für Medizin, Universitätsklinik Köln.
Medizinische Klinik (Munich, Germany : 1983)
|March 20, 1998
Summary
A restricted T-cell repertoire in kidney allografts suggests an immune basis for chronic rejection. Targeting dominant T-cell receptor V beta clones may offer selective immunosuppression for rejection.
Area of Science:
- Immunology
- Transplantation immunology
- Renal transplantation
Context:
- Chronic renal allograft rejection pathogenesis remains unclear.
- Immune-mediated graft injury is a proposed mechanism.
- T-cell receptor (TCR) variable (V) alpha and beta chains recognize allo-antigens.
Purpose:
- To investigate the T-cell receptor (TCR) V beta repertoire in renal allograft biopsies.
- To compare intragraft and peripheral blood T-cell repertoires in acute and chronic rejection.
Summary:
- A restricted T-cell repertoire, limited to 1-3 dominant V beta families, was observed intragraft in both acute and chronic renal allograft rejection.
- This intragraft restriction was individual and did not correlate with HLA mismatches.
- The T-cell repertoire in peripheral blood mononuclear cells (PBMC) was polyclonal and did not mirror the intragraft immune response.
Impact:
- Findings suggest an immunological basis for both acute and chronic renal allograft rejection.
- Targeting dominant V beta clones with tailor-made antibodies could enable selective immunosuppression.
- This approach may specifically target T cells activated by allo-antigens, offering a novel therapeutic strategy.