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JNK inhibition reduces apoptosis and neovascularization in a murine model of age-related macular degeneration

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单位: [1]Fourth Mil Med Univ, Xijing Hosp, Dept Ophthalmol, Xian 710032, Peoples R China [2]Univ Calif San Diego, Inst Genom Med, La Jolla, CA 92093 USA [3]Univ Calif San Diego, Shiley Eye Ctr, La Jolla, CA 92093 USA [4]W China Hosp, Mol Med Res Ctr, Chengdu 610064, Peoples R China [5]W China Hosp, Dept Ophthalmol, State Key Lab Biotherapy, Chengdu 610064, Peoples R China [6]Sichuan Univ, Chengdu 610064, Peoples R China [7]Huazhong Univ Sci & Technol, Tongji Med Coll, Tongji Hosp, Wuhan 430030, Peoples R China [8]Univ Calif San Diego, Lab Gene Regulat & Signal Transduct, Sch Med, La Jolla, CA 92093 USA [9]Univ Calif San Diego, Dept Pharmacol, Sch Med, La Jolla, CA 92093 USA [10]Univ Calif San Diego, Dept Pathol, Sch Med, La Jolla, CA 92093 USA [11]Vet Adm Healthcare Syst, La Jolla, CA 92161 USA
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Age-related macular degeneration (AMD) is the leading cause of registered blindness among the elderly and affects over 30 million people worldwide. It is well established that oxidative stress, inflammation, and apoptosis play critical roles in pathogenesis of AMD. In advanced wet AMD, although, most of the severe vision loss is due to bleeding and exudation of choroidal neovascularization (CNV), and it is well known that vascular endothelial growth factor (VEGF) plays a pivotal role in the growth of the abnormal blood vessels. VEGF suppression therapy improves visual acuity in AMD patients. However, there are unresolved issues, including safety and cost. Here we show that mice lacking c-Jun N-terminal kinase 1 (JNK1) exhibit decreased inflammation, reduced CNV, lower levels of choroidal VEGF, and impaired choroidal macrophage recruitment in a murine model of wet AMD (laser-induced CNV). Interestingly, we also detected a substantial reduction in choroidal apoptosis of JNK1-deficient mice. Intravitreal injection of a pan-caspase inhibitor reduced neovascularization in the laser-induced CNV model, suggesting that apoptosis plays a role in laser-induced pathological angiogenesis. Intravitreal injection of a specific JNK inhibitor decreased choroidal VEGF expression and reduced pathological CNV. These results suggest that JNK1 plays a key role in linking oxidative stress, inflammation, macrophage recruitment apoptosis, and VEGF production in wet AMD and pharmacological JNK inhibition offers a unique and alternative avenue for prevention and treatment of AMD.

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出版当年[2012]版:
大类 | 1 区 综合性期刊
小类 | 1 区 综合性期刊
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大类 | 1 区 综合性期刊
小类 | 1 区 综合性期刊
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出版当年[2011]版:
Q1 MULTIDISCIPLINARY SCIENCES
最新[2023]版:
Q1 MULTIDISCIPLINARY SCIENCES

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第一作者单位: [1]Fourth Mil Med Univ, Xijing Hosp, Dept Ophthalmol, Xian 710032, Peoples R China [2]Univ Calif San Diego, Inst Genom Med, La Jolla, CA 92093 USA [3]Univ Calif San Diego, Shiley Eye Ctr, La Jolla, CA 92093 USA [4]W China Hosp, Mol Med Res Ctr, Chengdu 610064, Peoples R China [5]W China Hosp, Dept Ophthalmol, State Key Lab Biotherapy, Chengdu 610064, Peoples R China [6]Sichuan Univ, Chengdu 610064, Peoples R China
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通讯机构: [8]Univ Calif San Diego, Lab Gene Regulat & Signal Transduct, Sch Med, La Jolla, CA 92093 USA [9]Univ Calif San Diego, Dept Pharmacol, Sch Med, La Jolla, CA 92093 USA
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