4.7 Article

Anti-TNF-α monoclonal antibody reverses psoriasis through dual inhibition of inflammation and angiogenesis

Journal

INTERNATIONAL IMMUNOPHARMACOLOGY
Volume 28, Issue 1, Pages 731-743

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.intimp.2015.07.036

Keywords

Tumor necrosis factor-alpha (INF-alpha); Anti-psoriatic therapy; K14-VEGF transgenic mice; Inflammation; Angiogenesis

Funding

  1. State Key Development Program of Basic Research of China Program [2012CB917104]
  2. New Century Excellent Talents in University of China [NCET-11-0342]

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Tumor necrosis factor-alpha (TNF-alpha) antagonists have shown remarkable efficacy in psoriasis; however, the precise mechanisms of action of TNF-alpha blocking agents mainly focus on their neutralizing TNF-alpha and its anti-inflammatory effects. In this study, we generated a humanized anti-TNF-alpha monoclonal antibody (IBI303) and suggested a potential mechanism of anti-TNF-alpha therapy for psoriasis. The results of SPR and ELISA indicated that IBI303 has a good affinity to TNF-alpha. In vitro, it could suppress TNF-alpha-induced cytotoxicity in WEHI164 cells. In vivo, administration of IBI303 to K14-VEGF transgenic mice led to a significant treatment efficiency in psoriasis in a dose-dependent manner. IHC staining and cytokines-ELISA indicated that TNF-alpha inhibition strongly reduced inflammatory cells infiltration and pro-inflammatory cytokines release, accompanied by suppression of inflamed dermal blood vessels. Mechanistically, in order to explain the anti-angiogenesis effect of anti-TNF-alpha antibody, the production of cytokine in macrophage conditional medium was measured by ELISA. The result indicated that the massive secretion of TNF-alpha stimulated by LPS in RAW264.7 cell supernatant was markedly neutralized in a dose-response manner by IBI303, moreover, the expression of NF-kappa B p65 was downregulated. Mouse endothelial cell tube formation assay showed that anti-TNF-alpha could inhibit blood vessels formation directly and indirectly. Collectively, our study suggested a kind of antipsoriatic mechanism of TNF-alpha inhibitors that is the dual inhibition of inflammation and angiogenesis. (C) 2015 Published by Elsevier B.V.

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