Anti-inflammatory effect of IL-6 receptor blockade in corneal alkali burn
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Sakimoto, Tohru
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Nihon Univ, Sch Med, Dept Visual Sci, Div Ophthalmol,Itabashi Ku, Tokyo 1738610, JapanNihon Univ, Sch Med, Dept Visual Sci, Div Ophthalmol,Itabashi Ku, Tokyo 1738610, Japan
Sakimoto, Tohru
[1
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Sugaya, Satoshi
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Nihon Univ, Sch Med, Dept Visual Sci, Div Ophthalmol,Itabashi Ku, Tokyo 1738610, JapanNihon Univ, Sch Med, Dept Visual Sci, Div Ophthalmol,Itabashi Ku, Tokyo 1738610, Japan
Sugaya, Satoshi
[1
]
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Ishimori, Akiko
[1
]
Sawa, Mitsuru
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Nihon Univ, Sch Med, Dept Visual Sci, Div Ophthalmol,Itabashi Ku, Tokyo 1738610, JapanNihon Univ, Sch Med, Dept Visual Sci, Div Ophthalmol,Itabashi Ku, Tokyo 1738610, Japan
Sawa, Mitsuru
[1
]
机构:
[1] Nihon Univ, Sch Med, Dept Visual Sci, Div Ophthalmol,Itabashi Ku, Tokyo 1738610, Japan
We investigated the effect of soluble IL-6R (sIL-6R) blockade on corneal inflammation. Topical instillation of either anti-IL-6R antibody (MR16-1) or phosphate buffered saline (PBS) was applied after wounding BALB/c mice corneas with alkali burn. The vascularized area was significantly reduced in the MR16-1 group. The immunoreactivity of phosphorylated STAT3, Gr-1, and F4/80 diminished significantly in the MR16-1 group. Laser capture microdissection resulted in a significant down-regulation of the mRNA expressions of ICAM-1, MCP-1, and VEGF-A in the corneal stroma of the MR16-1 group. Adding a combination of recombinant IL-6 and sIL-6R resulted in a significant increase in the release of VEGF from human corneal fibroblasts. As the infiltration of inflammatory cells, the expression of phosphorylated STAT3, and the expressions of inflammatory-related molecules in the experimental model of corneal inflammation were significantly inhibited by topical instillation of MR16-1, we deduce that IL-6 trans-signaling plays a significant role in ocular surface inflammation and that the blockade of IL-6R contributes to the reduction in corneal inflammation. (C) 2012 Elsevier Ltd. All rights reserved.