Abstract:
:The molecular mechanisms that underlie T-cell quiescence are poorly understood. In the present study, we report a primary immunodeficiency phenotype associated with MST1 deficiency and primarily characterized by a progressive loss of naive T cells. The in vivo consequences include recurrent bacterial and viral infections and autoimmune manifestations. MST1-deficient T cells poorly expressed the transcription factor FOXO1, the IL-7 receptor, and BCL2. Conversely, FAS expression and the FAS-mediating apoptotic pathway were up-regulated. These abnormalities suggest that increased cell death of naive and proliferating T cells is the main mechanism underlying this novel immunodeficiency. Our results characterize a new mechanism in primary T-cell immunodeficiencies and highlight a role of the MST1/FOXO1 pathway in controlling the death of human naive T cells.
journal_name
Bloodjournal_title
Bloodauthors
Nehme NT,Schmid JP,Debeurme F,André-Schmutz I,Lim A,Nitschke P,Rieux-Laucat F,Lutz P,Picard C,Mahlaoui N,Fischer A,de Saint Basile Gdoi
10.1182/blood-2011-09-378364subject
Has Abstractpub_date
2012-04-12 00:00:00pages
3458-68issue
15eissn
0006-4971issn
1528-0020journal_volume
119pub_type
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