TY - JOUR
T1 - Proinflammatory effects of Tweak/Fn14 interactions in glomerular mesangial cells
AU - Campbell, Sean
AU - Burkly, Linda C.
AU - Gao, Hua Xin
AU - Berman, Joan W.
AU - Su, Lihe
AU - Browning, Beth
AU - Zheng, Timothy
AU - Schiffer, Lena
AU - Michaelson, Jennifer S.
AU - Putterman, Chaim
PY - 2006/2/1
Y1 - 2006/2/1
N2 - TNF-like weak inducer of apoptosis, or TWEAK, is a relatively new member of the TNF-ligand superfamily. Ligation of the TWEAK receptor Fn14 by TWEAK has proinflammatory effects on fibroblasts, synoviocytes, and endothelial cells. Several of the TWEAK-inducible cytokines are important in the pathogenesis of kidney diseases; however, whether TWEAK can induce a proinflammatory effect on kidney cells is not known. We found that murine mesangial cells express cell surface TWEAK receptor. TWEAK stimulation of mesangial cells led to a dose-dependent increase in CCL2/MCP-1, CCL5/RANTES, CXCL10/IFN-γ-induced protein 10 kDa, and CXCL1/KC. The induced levels of chemokines were comparable to those found following mesangial cell exposure to potent proinflammatory stimuli such as TNF-α + IL-1β. CXCL11/interferon-inducible T cell α chemoattractant, CXCR5, mucosal addressin cell adhesion molecule-1, and VCAM-1 were up-regulated by TWEAK as well. TWEAK stimulation of mesangial cells resulted in an increase in phosphorylated Iκ-B, while pretreatment with an Iκ-B phosphorylation inhibitor significantly blocked chemokine induction, implicating activation of the NF-κB signaling pathway in TWEAK-induced chemokine secretion. Importantly, the Fn14-mediated proinflammatory effects of TWEAK on kidney cells were confirmed using mesangial cells derived from Fn14-deficient mice and by injection in vivo of TWEAK into wild-type vs Fn14-deficient mice. Finally, TWEAK-induced chemokine secretion was prevented by treatment with novel murine anti-TWEAK Abs. We conclude that TWEAK induces mesangial cells to secrete proinflammatory chemokines, suggesting a prominent role for TWEAK in the pathogenesis of renal injury. Our results support Ab inhibition of TWEAK as a potential new approach for the treatment of chemokine-dependent inflammatory kidney diseases.
AB - TNF-like weak inducer of apoptosis, or TWEAK, is a relatively new member of the TNF-ligand superfamily. Ligation of the TWEAK receptor Fn14 by TWEAK has proinflammatory effects on fibroblasts, synoviocytes, and endothelial cells. Several of the TWEAK-inducible cytokines are important in the pathogenesis of kidney diseases; however, whether TWEAK can induce a proinflammatory effect on kidney cells is not known. We found that murine mesangial cells express cell surface TWEAK receptor. TWEAK stimulation of mesangial cells led to a dose-dependent increase in CCL2/MCP-1, CCL5/RANTES, CXCL10/IFN-γ-induced protein 10 kDa, and CXCL1/KC. The induced levels of chemokines were comparable to those found following mesangial cell exposure to potent proinflammatory stimuli such as TNF-α + IL-1β. CXCL11/interferon-inducible T cell α chemoattractant, CXCR5, mucosal addressin cell adhesion molecule-1, and VCAM-1 were up-regulated by TWEAK as well. TWEAK stimulation of mesangial cells resulted in an increase in phosphorylated Iκ-B, while pretreatment with an Iκ-B phosphorylation inhibitor significantly blocked chemokine induction, implicating activation of the NF-κB signaling pathway in TWEAK-induced chemokine secretion. Importantly, the Fn14-mediated proinflammatory effects of TWEAK on kidney cells were confirmed using mesangial cells derived from Fn14-deficient mice and by injection in vivo of TWEAK into wild-type vs Fn14-deficient mice. Finally, TWEAK-induced chemokine secretion was prevented by treatment with novel murine anti-TWEAK Abs. We conclude that TWEAK induces mesangial cells to secrete proinflammatory chemokines, suggesting a prominent role for TWEAK in the pathogenesis of renal injury. Our results support Ab inhibition of TWEAK as a potential new approach for the treatment of chemokine-dependent inflammatory kidney diseases.
UR - http://www.scopus.com/inward/record.url?scp=31144452060&partnerID=8YFLogxK
U2 - 10.4049/jimmunol.176.3.1889
DO - 10.4049/jimmunol.176.3.1889
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C2 - 16424220
AN - SCOPUS:31144452060
SN - 0022-1767
VL - 176
SP - 1889
EP - 1898
JO - Journal of Immunology
JF - Journal of Immunology
IS - 3
ER -