Human TCR alpha/beta+ CD4-CD8- double-negative T cells in patients with autoimmune lymphoproliferative syndrome express restricted Vbeta TCR diversity and are clonally related to CD8+ T cells.
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.
Bristeau-Leprince
Anne
A
Antiviral Immunity, Biotherapy and Vaccine Unit, Infection and Epidemiology Department, Institut Pasteur, Paris, France.
Mateo
Véronique
V
Lim
Annick
A
Magerus-Chatinet
Aude
A
Solary
Eric
E
Fischer
Alain
A
Rieux-Laucat
Frédéric
F
Gougeon
Marie-Lise
ML
D000328:Adult; D000595:Amino Acid Sequence; D001324:Autoantigens / Q000737:chemistry / Q000235:genetics / Q000276:immunology; D001327:Autoimmune Diseases / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D001483:Base Sequence; D015704:CD4 Antigens / Q000276:immunology; D016827:CD8 Antigens / Q000276:immunology; D002469:Cell Separation; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008232:Lymphoproliferative Disorders / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D008297:Male; D008969:Molecular Sequence Data; D010641:Phenotype; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D020539:Sequence Analysis, Protein; D013601:T-Lymphocytes / Q000276:immunology*; D014158:Transcription, Genetic / Q000235:genetics
D001324:Autoantigens; D015704:CD4 Antigens; D016827:CD8 Antigens; D016693:Receptors, Antigen, T-Cell, alpha-beta