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Journal articles
Human TCR {alpha}/{beta}+ CD4-CD8- Double-Negative T Cells in Patients with Autoimmune Lymphoproliferative Syndrome Express Restricted V{beta} TCR Diversity and Are Clonally Related to CD8+ T Cells.
Abstract : The peripheral expansion of alpha/beta(+)-CD4(-)CD8(-) double negative (DN) T cells in patients with autoimmune lymphoproliferative syndrome (ALPS) is a consistent feature of this disease, and part of the diagnostic criteria of ALPS. The origin of these cells remains undetermined. They could derive from mature T cells that have lost coreceptor expression, or represent a special minor cell lineage. To investigate relationship of DN and single positive (SP) T cells in ALPS, we used Immunoscope technology to analyze the TCRVbeta repertoire diversity of sorted DN and SP T cells, and we performed CDR3 sequence analyses of matching clonotypes. We show that DN T cells express all the Vbeta gene families that are used by their SP counterparts, though they dominantly use some Vbeta genes. Analysis of CDR3 length distribution revealed a diverse polyclonal TCR repertoire for sorted CD4(+) T cells, whereas both DN and CD8(+) T cells showed a skewed TCR repertoire with oligoclonal expansions throughout most of the Vbeta families. CDR3 sequencing of matching clonotypes revealed a significant sharing of CDR3 sequences from selected Vbeta-Jbeta transcripts between DN and CD8(+) T cells. Altogether, these data strongly argue for a CD8 origin of DN T cells in ALPS.
https://hal-pasteur.archives-ouvertes.fr/pasteur-00293060
Contributor : Marie-Lise Gougeon Connect in order to contact the contributor
Submitted on : Saturday, January 3, 2009 - 7:00:01 AM
Last modification on : Friday, May 20, 2022 - 9:06:06 AM
Long-term archiving on: : Friday, May 28, 2010 - 7:49:12 PM
Contributor : Marie-Lise Gougeon Connect in order to contact the contributor
Submitted on : Saturday, January 3, 2009 - 7:00:01 AM
Last modification on : Friday, May 20, 2022 - 9:06:06 AM
Long-term archiving on: : Friday, May 28, 2010 - 7:49:12 PM
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JI_ALPS.pdf
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