Analysis of the mechanism of exacerbation of psoriasis by the epidermal basal cell proliferation-enhancing effect of diet-derived oxidized sterols
Project/Area Number |
18K16026
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 53050:Dermatology-related
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Research Institution | Osaka University |
Principal Investigator |
Saga Ayami 大阪大学, 医学系研究科, 特任研究員(常勤) (10535925)
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Project Period (FY) |
2018-04-01 – 2021-03-31
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Project Status |
Completed (Fiscal Year 2020)
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Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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)
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Keywords | 7-ketocholesterol / 乾癬 / IL-23 / IL-17 / 酸化コレステロール / 酸化ステロール / コレステロール / T細胞 |
Outline of Final Research Achievements |
We analyzed whether 7-ketocholesterol (7-KC), a dietary exogenous oxidized sterol, exacerbate psoriasis-like dermatitis in mice. After mice fed with high-fat, high-cholesterol bile acid ± 7-KC for 3 weeks, which induced psoriasis-like dermatitis by treated with imiquimod cream to the auricle and back skin for 4 days. At 7-KC (+), the auricular thickness increased and the epidermal layer of the back skin thickened. The amount of IL-23a and IL-17 mRNA increased in the 7-KC (+) in the back skin. These suggest that 7-KC contributed to the acceleration of psoriasis-like dermatitis.
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Academic Significance and Societal Importance of the Research Achievements |
乾癬、動脈硬化、非アルコール性脂肪肝炎 (NASH) は、疫学的に重複して発症すると示唆されているが、共通する特定の背景は報告されていない。食餌由来の外因性酸化ステロールである7-ketocholesterol (7-KC)は、様々な慢性炎症性疾患を惹起する可能性があることが報告されている。しかし、7-KCが乾癬を促進させるとの報告はなかった。今回の研究で、7-KCの摂取・蓄積により乾癬様皮膚炎の病態が悪化すること、並びにその分子メカニズムが明らかになれば、腸管での吸収に着目した新しい食事・薬物療法を提案できると考える。
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Report
(4 results)
Research Products
(13 results)
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[Journal Article] Dietary oxysterol, 7-Ketocholesterol accelerates hepatic lipid accumulation and macrophage infiltration in obese Mice2021
Author(s)
J. Chang, M. oseki, A. Saga, K. Kanno, T. Higo, D. Okuzaki, T. Okada, H. Inui, K. Tanaka, M. Asaji, Y. Zhu, K. Yamada, M. Ono, T. Saibara, I Ichi, T. Ohama, M. Nishida, S. Yamashita, Y. Sakata
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Journal Title
Front Endocrinol (Lausanne)
Volume: 11
Pages: 614692-614692
DOI
Related Report
Peer Reviewed / Open Access
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[Presentation] The dietary 7-ketocholesterol accelerated steatohepatitis in ob/ob mice.2020
Author(s)
Chang J, Koseki M, Saga A, Kanno K, Okada T, Saito S, Kamada Y, Inui H, Asaji M, Zhu Y, Ohama T, Nishida M, Yamashita S, Sakata Y.
Organizer
第62回日本脂質生化学会
Related Report
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[Presentation] Prevalence of Coronary Artery Disease and Achievement of Low-density Lipoprotein Cholesterol Management Targets in Familial Hypercholesterolemia Patients at Osaka University Hospital2020
Author(s)
Koseki M, Kanno K, Saga A, Chang J, Inui H, Okada T, Ohama T, Nishida M, Kamada Y, Miyoshi E, Yamashita S, Sakata Y.
Organizer
88th European Atherosclerosis Congress
Related Report
Int'l Joint Research
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[Presentation] A dietary oxysterol, 7-ketocholesterol, exacerbates imiquimod-induced psoriasis-like dermatitis in steatohepatitis mice2020
Author(s)
Saga A, Koseki M, Kanno K, Chang J, Asaji M, Okada T, Inui H, Zhu Y, Ohama T, Nishida M, Yamashita S, Sakata Y.
Organizer
日本研究皮膚科学会 第45回年次学術大会・総会
Related Report
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