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Early onset combined immunodeficiency and autoimmunity in patients with loss-of-function mutation in LAT
University of Medical Centre, Germany; University of Freiburg, Germany.
Ruth Rappaport Childrens Hospital, Israel.
University of Medical Centre, Germany; University of Freiburg, Germany; University of Freiburg, Germany; University of Freiburg, Germany.
Rambam Health Care Campus, Israel.
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2016 (English)In: Journal of Experimental Medicine, ISSN 0022-1007, E-ISSN 1540-9538, Vol. 213, no 7, 1185-1199 p.Article in journal (Refereed) Published
Abstract [en]

The adapter protein linker for activation of T cells (LAT) is a critical signaling hub connecting T cell antigen receptor triggering to downstream T cell responses. In this study, we describe the first kindred with defective LAT signaling caused by a homozygous mutation in exon 5, leading to a premature stop codon deleting most of the cytoplasmic tail of LAT, including the critical tyrosine residues for signal propagation. The three patients presented from early childhood with combined immunodeficiency and severe autoimmune disease. Unlike in the mouse counterpart, reduced numbers of T cells were present in the patients. Despite the reported nonredundant role of LAT in Ca2+ mobilization, residual T cells were able to induce Ca2+ influx and nuclear factor (NF) kappa B signaling, whereas extracellular signal-regulated kinase (ERK) signaling was completely abolished. This is the first report of a LAT-related disease in humans, manifesting by a progressive combined immune deficiency with severe autoimmune disease.

Place, publisher, year, edition, pages
ROCKEFELLER UNIV PRESS , 2016. Vol. 213, no 7, 1185-1199 p.
National Category
Cell and Molecular Biology
Identifiers
URN: urn:nbn:se:liu:diva-131197DOI: 10.1084/jem.20151110ISI: 000380849800009PubMedID: 27242165OAI: oai:DiVA.org:liu-131197DiVA: diva2:971894
Note

Funding Agencies|German Federal Ministry of Education and Research [BMBF 01EO1303]; Deutsche Forschungsgemeinschaft [DFG WA 1597/4-1]; Hebrew University; Hadassah Medical Center; Excellence Initiative of the German Research Foundation (Spemann Graduate School) [GSC-4]

Available from: 2016-09-19 Created: 2016-09-12 Last updated: 2016-09-19

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Sigvardsson, Mikael
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Division of Microbiology and Molecular MedicineFaculty of Medicine and Health Sciences
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