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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Han, Longhui Huang, Jingwen Cheng, Xiaokang Dai, Ye Chen, Xiaoqing Su, Wenru Liang, Dan |
| Description | Country affiliation: China Author Affiliation: Huang J ( State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China 2Department of Ophthalmology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.); Su W ( State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.); Chen X ( State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.); Cheng X ( State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.); Dai Y ( State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.); Han L ( State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.); Liang D ( State Key Laboratory of Ophthalmology Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.) |
| Abstract | PURPOSE: We explored the anti-inflammatory effects of doxycycline in experimental uveitis and the underlying mechanisms. METHODS: Rats with endotoxin-induced uveitis (EIU) received doxycycline (1.5 mg/kg) or the control vehicle via intraperitoneal injection. Clinical scores were graded under a slit lamp. Rat peritoneal macrophages were used in vitro to further explore the anti-inflammatory mechanisms of doxycycline. The levels of nitric oxide (NO), TNF- , IL-1ß, prostaglandin E2 (PGE2), cyclooxygenase (COX)-2, I kappa B- (IκB- ), inducible nitric oxide synthase (iNOS), Akt, caspase-3, and nuclear factor-kappa B (NF-κB) were analyzed. RESULTS: Treatment with doxycycline dramatically reduced the clinical scores of EIU (P < 0.001), with significant decreases in inflammatory cell infiltration, protein concentrations, and the production of NO, TNF- , and IL-1ß in the aqueous humor (AqH). In vitro, doxycycline significantly inhibited the production of NO, IL-1ß, and TNF- in peritoneal macrophages by modulating the PI3K/Akt/IκB- /NF-κB pathway. Importantly, we found that doxycycline significantly enhanced COX2 expression and PGE2 production both in vivo and in vitro. More importantly, blockade of the EP4 receptor of PGE2 significantly reversed the doxycycline-mediated inhibition of macrophages and the PI3K/Akt pathway in vitro. Furthermore, simultaneous injection of an EP4 antagonist and doxycycline significantly blocked the doxycycline-mediated attenuation of EIU. CONCLUSIONS: Doxycycline can ameliorate EIU, and PGE2-EP4 signaling is essential for the anti-inflammatory effects of doxycycline in vitro and in vivo. |
| ISSN | 01460404 |
| e-ISSN | 15525783 |
| Journal | Investigative Opthalmology & Visual Science |
| Issue Number | 11 |
| Volume Number | 56 |
| Language | English |
| Publisher | Association for Research in Vision and Ophthalmology |
| Publisher Date | 2015-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Anti-inflammatory Agents Therapeutic Use Dinoprostone Physiology Doxycycline Uveitis Drug Therapy Animals Aqueous Humor Chemistry Caspase 3 Cyclooxygenase 2 Endotoxins Pharmacology I-kappa B Proteins Macrophages Drug Effects Nf-kappa B Nitric Oxide Synthase Nitric Oxide Synthase Type Ii Nitroglycerin Proto-oncogene Proteins C-akt Rats, Wistar Receptors, Prostaglandin E, Ep4 Subtype Signal Transduction Slit Lamp Chemically Induced Research Support, Non-u.s. Gov't Discipline Ophthalmology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ophthalmology Sensory Systems Cellular and Molecular Neuroscience |
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