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Defective synthesis or association of T-cell receptor chains underlies loss of surface T-cell receptor–CD3 expression in enteropathy-associated T-cell lymphoma

Authors :
Tjon, Jennifer M.L.
Verbeek, Wieke H.M.
Kooy-Winkelaar, Yvonne M.C.
Nguyen, Binh H.
van der Slik, Arno R.
Thompson, Allan
Heemskerk, Mirjam H.M.
Schreurs, Marco W.J.
Dekking, Liesbeth H.A.
Mulder, Chris J.
van Bergen, Jeroen
Koning, Frits
Source :
Blood; December 2008, Vol. 112 Issue: 13 p5103-5110, 8p
Publication Year :
2008

Abstract

Enteropathy-associated T-cell lymphoma, an often fatal complication of celiac disease, can result from expansion of aberrant intraepithelial lymphocytes in refractory celiac disease type II (RCD II). Aberrant intraepithelial lymphocytes and lymphoma cells are intracellularly CD3ϵ+but lack expression of the T-cell receptor (TCR)–CD3 complex on the cell surface. It is unknown what causes the loss of TCR-CD3 expression. We report the isolation of a cell line from an RCD II patient with the characteristic phenotype of enteropathy-associated T-cell lymphoma. We demonstrate that in this cell line the TCR-α and -β chains as well as the CD3γ, CD3δ, CD3ϵ, and ζ-chains are present intracellularly and that assembly of the CD3γϵ, CD3δϵ, and ζζ-dimers is normal. However, dimerization of the TCR chains and proper assembly of the TCR-CD3 complex are defective. On introduction of exogenous TCR-β chains, but not of TCR-α chains, assembly and functional cell surface expression of the TCR-CD3 complex were restored. Defective synthesis of both TCR chains was found to underlie loss of TCR expression in similar cell lines isolated from 2 additional patients. (Pre)malignant transformation in RCD II thus correlates with defective synthesis or defective association of the TCR chains, resulting in loss of surface TCR-CD3 expression.

Details

Language :
English
ISSN :
00064971 and 15280020
Volume :
112
Issue :
13
Database :
Supplemental Index
Journal :
Blood
Publication Type :
Periodical
Accession number :
ejs56992059
Full Text :
https://doi.org/10.1182/blood-2008-04-150748