Details

Autor(en) / Beteiligte

• Zandi, Souska
• Nakao, Shintaro
• Chun, Kwang-Hoon
• Fiorina, Paolo
• Sun, Dawei
• Arita, Ryoichi
• Zhao, Ming
• Kim, Enoch
• Schueller, Olivier
• Campbell, Stewart
• Taher, Mahdi
• Melhorn, Mark Ivan
• Schering, Alexander
• Gatti, Francesca
• Tezza, Sara
• Xie, Fang
• Vergani, Andrea
• Yoshida, Shigeo
• Ishikawa, Keijiro
• Yamaguchi, Muneo
• Sasaki, Fumiyuki
• Schmidt-Ullrich, Ruth
• Hata, Yasuaki
• Enaida, Hiroshi
• Yuzawa, Mitsuko
• Yokomizo, Takehiko
• Kim, Young-Bum
• Sweetnam, Paul
• Ishibashi, Tatsuro
• Hafezi-Moghadam, Ali

Titel

ROCK-Isoform-Specific Polarization of Macrophages Associated with Age-Related Macular Degeneration

Ist Teil von

• Cell reports (Cambridge), 2015-02, Vol.10 (7), p.1173-1186

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2015

Quelle

MEDLINE

Beschreibungen/Notizen

• Age is a major risk factor in age-related macular degeneration (AMD), but the underlying cause is unknown. We find increased Rho-associated kinase (ROCK) signaling and M2 characteristics in eyes of aged mice, revealing immune changes in aging. ROCK isoforms determine macrophage polarization into M1 and M2 subtypes. M2-like macrophages accumulated in AMD, but not in normal eyes, suggesting that these macrophages may be linked to macular degeneration. M2 macrophages injected into the mouse eye exacerbated choroidal neovascular lesions, while M1 macrophages ameliorated them, supporting a causal role for macrophage subtypes in AMD. Selective ROCK2 inhibition with a small molecule decreased M2-like macrophages and choroidal neovascularization. ROCK2 inhibition upregulated M1 markers without affecting macrophage recruitment, underlining the plasticity of these macrophages. These results reveal age-induced innate immune imbalance as underlying AMD pathogenesis. Targeting macrophage plasticity opens up new possibilities for more effective AMD treatment. [Display omitted] •ROCK isoforms determine macrophage polarization•M2-like macrophages are critical in age-related macular degeneration (AMD)•Age-induced macrophage polarization explains the angiogenic switch in exudative AMD•Targeting ROCK2 restores the normal macrophage balance found in the young eye How age is linked to age-related macular degeneration (AMD) is unknown. Zandi et al. now describe altered ROCK signaling and macrophage polarization in the aging eye. The ensuing imbalance toward M2 macrophages explains the angiogenic switch in AMD. Selective ROCK2 inhibition restores the balanced condition found in the young eye.