Role of complement factor MASP-1/3 in age-related macular degeneration and therapeutic effect of novel complement inhibitors
Project/Area Number |
17K16975
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Ophthalmology
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Research Institution | Fukushima Medical University |
Principal Investigator |
Omori Tomoko 福島県立医科大学, 医学部, 助教 (50754222)
|
Project Period (FY) |
2017-04-01 – 2020-03-31
|
Project Status |
Completed (Fiscal Year 2019)
|
Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
|
Keywords | 加齢黄斑変性 / 補体 / 免疫学 |
Outline of Final Research Achievements |
We aimed to clarify the role of complement factor MASP-1/3 of the lectin and alternative pathways in the development of neovascular age-related macular degeneration (nAMD). In patients with nAMD, the ratios of aqueous humor levels of C4a/C4 and C3a/C3 were significantly higher than in cataract patients, providing conclusive evidence for intraocular activation of the lectin and/or classical pathway in nAMD eyes. Furthermore, using mouse model of laser-induced choroidal neovascularization, which has been used extensively studies of nAMD, we found that the nAMD-like lesion was alleviated in mice deficient for MASP-1/3 compared to wild-type mice, although there was no significant difference between them. Our results strongly suggest the contribution of MASP-1/3 in the development of nAMD.
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Academic Significance and Societal Importance of the Research Achievements |
本研究の結果、第二経路に加え、眼内におけるレクチン経路と古典経路の一方または両方の活性化が滲出型加齢黄斑変性の病態に関与することが明らかとなった。よって、MASP-1/3を標的とする治療法が有効である可能性が強く示唆された。これらの成果は、滲出型加齢黄斑変性の病態における補体の関与への理解を深め、滲出型加齢黄斑変性の新規治療法や新規診断法の開発に繋がると期待される。
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Report
(4 results)
Research Products
(10 results)
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[Journal Article] Evidence for Activation of Lectin and Classical Pathway Complement Components in Aqueous Humor of Neovascular Age-Related Macular Degeneration.2020
Author(s)
Omori T, Oguchi Y, Machida T, Kato Y, Ishida Y, Ojima A, Itagaki K, Shintake H, Tomita R, Kasai A, Sugano
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Journal Title
Ophthalmic Res
Volume: 63
Issue: 3
Pages: 252-258
DOI
Related Report
Peer Reviewed
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[Journal Article] A novel complement inhibitor sMAP-FH targeting both the lectin and alternative complement pathways2020
Author(s)
Takasumi M, Omori T, Machida T, Ishida Y, Hayashi M, Suzuki T, Homma Y, Endo Y, Takahashi M, Ohira H, Fujita T, Sekine H
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Journal Title
FASEB J
Volume: 34
Issue: 5
Pages: 6598-6612
DOI
Related Report
Peer Reviewed
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[Journal Article] Cutting Edge: Role of MASP-3 in the physiological activation of factor D of the alternative complement pathway2019
Author(s)
Manabu Hayashi, Takeshi Machida, Yumi Ishida, Yusuke Ogata, Tomoko Omori, Mika Takasumi, Yuichi Endo, Toshiyuki Suzuki, Masayuki Sekimata, Yoshimi Homma, Masahito Ikawa, Hiromasa Ohira, Teizo Fujita, and Hideharu Sekine
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Journal Title
The Journal of Immunology
Volume: 203
Issue: 6
Pages: 1411-1416
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] MASP-1 and MASP-3 play independent roles in activation of the lectin and alternative complement pathways2018
Author(s)
Manabu Hayashi, Yumi Ishida, Takeshi Machida, Yusuke Ogata, Tomoko Omori, Mika Takasumi, Yuishi Endo, Masahiko Ikawa, Hiromasa Ohira, Teizo Fujita, Hideharu Sekine
Organizer
XXVII International Complement Workshop
Related Report
Int'l Joint Research
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