Rasal3-mediated T cell survival is essential for inflammatory responses.
Biochem Biophys Res Commun
; 496(1): 25-30, 2018 01 29.
Article
in En
| MEDLINE
| ID: mdl-29291408
ABSTRACT
Fine regulation of the Ras/mitogen-activating protein kinase (MAPK) pathway is crucial in controlling the survival, proliferation, and development of various types of cells. Ras-activating protein-like 3 (Rasal3) is a T cell-specific Ras GTPase-activating protein that negatively regulates T cell receptor (TCR)-induced activation of Ras/MAPK pathway. Rasal3-deficient mice showed a decreased number of naive T cells because Rasal3 is required for the survival of naive T cells. In the current study, we observed ameliorated Type1 T helper (Th1) cell- and Type2 T helper (Th2) cell-dependent contact hypersensitivity reactions in Rasal3-deficient mice, along with a marked shortage of T cells at regional lymph node. Activated Rasal3-deficient T cells showed an increased cell death with reduced Bcl2 expression, suggesting that Rasal3 is required for the survival of not only naïve T cells but also activated T cells. Collectively, Rasal3 controls the magnitude of inflammatory responses through the survival of both naive T cells and activated T cells in vivo.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Lymphocyte Activation
/
T-Lymphocytes
/
Cell Survival
/
Ras GTPase-Activating Proteins
/
Dermatitis, Contact
Limits:
Animals
Language:
En
Journal:
Biochem Biophys Res Commun
Year:
2018
Document type:
Article
Affiliation country:
Japan