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Zhao TT, Wen-Fei W, Kun G, Si-Ming L, Ye J, Yang ZF, Jian-Nan L, Yan-Li W, Shao-Min P. Fibroblast growth factor-21 alleviates phenotypic characteristics of dry age-related macular degeneration in mice. Exp Eye Res 2022; 218:109014. [PMID: 35245515 DOI: 10.1016/j.exer.2022.109014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 02/13/2022] [Accepted: 02/22/2022] [Indexed: 11/16/2022]
Abstract
Age-related macular degeneration (AMD) is the main cause of blindness in elderly individuals. As a metabolic regulator, fibroblast growth factor 21 (FGF-21) has been proven indicated to have an effect on wet AMD, but whether this cytokine has a therapeutic effect on dry AMD is unclear. The current study aimed to evaluate the preventive effects of FGF-21 against retinal degeneration in mice and provide mechanistic insights. FGF-21-/- mice were raised to 10 months of age. Then, the morphological changes in the retinal pigment epithelium (RPE)/choroid of the mice were observed by transmission electron microscopy (TEM), and iTRAQ was used to detect the variations in the protein profile. Next, FGF-21-/- and wild-type mice of the same age were fed hydroquinone to generate a dry AMD mouse model to examine whether exogenous FGF-21 can interfere with the occurrence and development of dry AMD. In vivo studies revealed that following FGF-21 knockout, there was an increase in the expression of complement in the RPE/choroid concomitant with the occurrence of dry AMD-like pathological changes. Furthermore, exogenous FGF-21 administration effectively reversed this phenomenon. FGF-21 also demonstrated strong anti-inflammatory effects in the RPE/choroid by inhibiting the NF-κB pathway. In conclusion, the present study demonstrates that FGF-21 treatment presents a novel therapeutic approach for the prevention and development of dry AMD by reducing complement.
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Affiliation(s)
- Ting-Ting Zhao
- Aier School of Ophthalmology, Central South University, Changsha, 410015, China; Harbin Aier Eye Hospital, Harbin, 150016, China.
| | - Wang Wen-Fei
- School of Life Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Gao Kun
- School of Life Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Li Si-Ming
- Harbin University of Commerce, Harbin, 150076, China.
| | - Jiang Ye
- School of Life Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Zhi-Feng Yang
- School of Life Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Liu Jian-Nan
- Aier School of Ophthalmology, Central South University, Changsha, 410015, China; Harbin Aier Eye Hospital, Harbin, 150016, China.
| | - Wang Yan-Li
- School of Life Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Peng Shao-Min
- Aier School of Ophthalmology, Central South University, Changsha, 410015, China; Harbin Aier Eye Hospital, Harbin, 150016, China; Aier Retina Institute, Changsha, 410015, China.
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