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pubmed-article:10640774pubmed:abstractTextChronic rejection represents a major cause of long-term kidney graft loss. T cells that are predominant in long-term rejected kidney allografts (35 +/- 10% of area infiltrate) may thus be instrumental in this phenomenon, which is likely to be dependent on the indirect pathway of allorecognition only. We have analyzed the variations in T cell repertoire usage of the V beta chain at the complementary determining region 3 (CDR3) level in 18 human kidney grafts lost due to chronic rejection. We observed a strongly biased intragraft TCR V beta usage for the majority of V beta families and also a very high percentage (55%) of V beta families exhibiting common and oligoclonal V beta-C beta rearrangements in the grafts of patients with chronic rejection associated with superimposed histologically acute lesions. Furthermore, V beta 8 and V beta 23 families exhibited common and oligoclonal V beta-J beta rearrangements in 4 of 18 patients (22%). Several CDR3 amino acid sequences were found for the common and oligoclonal V beta 8-J beta 1.4 rearrangement. Quantitative PCR showed that biased V beta transcripts were also overexpressed in chronically rejected kidneys with superimposed acute lesions. In contrast, T lymphocytes infiltrating rejected allografts with chronic rejection only showed an unaltered Gaussian-type CDR3 length distribution. This pattern suggests that late graft failure associated with histological lesions restricted to Banff-defined chronic rejection does not involve T cell-mediated injury. Thus, our observation suggests that a limited number of determinants stimulates the recipient immune system in long-term allograft failure. The possibility of a local response against viral or parenchymatous cell-derived determinants is discussed.lld:pubmed
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pubmed-article:10640774pubmed:articleTitleHighly altered V beta repertoire of T cells infiltrating long-term rejected kidney allografts.lld:pubmed
pubmed-article:10640774pubmed:affiliationInstitut National de la Santé et de la Recherche Médicale, Unité 437, "Immunointervention dans les Allo et Xénotransplantations" Nantes, France.lld:pubmed
pubmed-article:10640774pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10640774pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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