Swiprosin-1 Expression Is Up-Regulated through Protein Kinase C-theta and NF-kappaB Pathway in T Cells
Immune Network
;
: 55-62, 2013.
Article
in English
| WPRIM
| ID: wpr-147332
ABSTRACT
Swiprosin-1 exhibits the highest expression in CD8+ T cells and immature B cells and has been proposed to play a role in lymphocyte biology through actin remodeling. However, regulation of swiprosin-1 gene expression is poorly understood. Here we report that swiprosin-1 is up-regulated in T cells by PKC pathway. Targeted inhibition of the specific protein kinase C (PKC) isotypes by siRNA revealed that PKC-theta is involved in the expression of swiprosin-1 in the human T cells. In contrast, down-regulation of swiprosin-1 by A23187 or ionomycin suggests that calcium-signaling plays a negative role. Interestingly, swiprosin-1 expression is only reduced by treatment with NF-kappaB inhibitors but not by NF-AT inhibitor, suggesting that the NF-kappaB pathway is critical for regulation of swiprosin-1 expression. Collectively, these results suggest that swiprosin-1 is a PKC-theta-inducible gene and that it may modulate the late phase of T cell activation after antigen challenge.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Protein Kinases
/
Biology
/
Protein Kinase C
/
Lymphocytes
/
T-Lymphocytes
/
Down-Regulation
/
Gene Expression
/
Ionomycin
/
NF-kappa B
/
Calcimycin
Limits:
Humans
Language:
English
Journal:
Immune Network
Year:
2013
Type:
Article
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