Elucidation of Epigenome network for regulating inflammation memory
Project/Area Number |
20K07328
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 48040:Medical biochemistry-related
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Research Institution | Kumamoto University |
Principal Investigator |
KOGA Tomoaki 熊本大学, 発生医学研究所, 講師 (30615092)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Project Status |
Completed (Fiscal Year 2022)
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Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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Keywords | 炎症メモリー / エピゲノム / 細胞記憶 / マクロファージ / ヒストンメチル化 / ヒストン修飾 / 脂質 / ヒストン脱メチル化酵素 / 代謝 |
Outline of Research at the Start |
免疫記憶は、T細胞やB細胞などに特化した機能であると考えられてきましたが、近年、自然免疫細胞や組織肝細胞、線維芽細胞などの非免疫細胞も炎症刺激を記憶しその後の応答に備えることが明らかになっています。しかしながらこの炎症メモリーは、どの細胞にどのような分子メカニズムで記憶されるかなど、不明な点が多く残されています。そこで本研究では、炎症メモリーの構築・維持・消去に関わる分子メカニズムの解明に着目し、「炎症メモリーを獲得した炎症細胞サブセットが、個体の表現型のバランスを規定する」という仮説を検証し、炎症メモリー細胞の除去や、炎症メモリーの維持・消去など炎症疾患の新規創薬概念の提起に繋げていきます。
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Outline of Final Research Achievements |
Immunological memory has been thought to be restricted to acquired immunity for a long time, but recent reports showed that innate immune cells and non-immune cells also remember their experience to be exposed to inflammation. Now it is called "Inflammatory memory". In inflammatory memory, what kinds of cells can remember, how they can remember, and what is the meaning of memory, those questions remain to be elucidated. In the present study, we focused on macrophages to reveal the molecular mechanisms of inflammatory memory. As a result, we found mevalonate pathway is important for the regulation of inflammatory memory. In addition, we identified a histone demethylase KDM7A as a novel negative regulator for M2 macrophage polarization. These results indicate new insights into the understanding of inflammatory memory.
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Academic Significance and Societal Importance of the Research Achievements |
本研究ではマクロファージを用いて炎症メモリーの分子機構の一端を解明した。炎症メモリーは慢性炎症の増悪化に寄与するなど、難治性病態に深く関わる。今回、炎症メモリーのメカニズムとしてメバロン酸経路を同定したことは、学術的に興味深いだけでなく、既に臨床で使われているスタチンなどの薬剤が慢性炎症の治療に使える可能性を示唆するものである。また、M2マクロファージ極性化の新たな分子機構を解明したことについては、KDM7Aというあまり機能が知られていない分子の機能を明らかにしたというだけではなく、肺線維症の治療標的を提起した上でも非常に意義深い。
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Report
(4 results)
Research Products
(31 results)
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[Journal Article] Expression of leukotriene B4 receptor 1 defines functionally distinct DCs that control allergic skin inflammation.2020
Author(s)
Tomoaki Koga, Fumiyuki Sasaki, Kazuko Saeki, Soken Tsuchiya, Toshiaki Okuno, Mai Ohba, Takako Ichiki, Satoshi Iwamoto, Hirotsugu Uzawa, Keiko Kitajima, Chikara Meno, Eri Nakamura, Norihiro Tada, Yoshinori Fukui, Junichi Kikuta, Masaru Ishii, Yukihiko Sugimoto, and Mitsuyoshi Nakao, Takehiko Yokomizo.
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Journal Title
Cellular & Molecular Immunology
Volume: 8
Issue: 6
Pages: 1-13
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Leukotriene A4 hydrolase deficiency protects mice from diet-induced obesity by increasing energy expenditure through neuroendocrine axis.2020
Author(s)
Uzawa H, Kohno D, Koga T, Sasaki T, Fukunaka A, Okuno T, Jo-Watanabe A, Kazuno S, Miyatsuka T, Kitamura T, Fujitani Y, Watada H, Saeki K*, Yokomizo T
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Journal Title
FASEB J
Volume: 34(10)
Issue: 10
Pages: 13949-13958
DOI
Related Report
Peer Reviewed
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[Journal Article] Leukotriene B4 receptor 1 exacerbates inflammation following myocardial infarction.2020
Author(s)
Horii Y, Nakaya M, Ohara H, Nishihara H, Watari K, Nagasaka A, Nakaya T, Sugiura Y, Okuno T, Koga T, Tanaka A, Yokomizo T, Kurose H.
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Journal Title
FASEB Journal
Volume: 印刷中
Issue: 6
Pages: 8749-8763
DOI
Related Report
Peer Reviewed / Open Access
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[Presentation] Leukotriene B4 receptor 1 defines functionally and epigenetically distinct DCs that control allergic skin inflammation.2022
Author(s)
Koga T, Sasaki F, Saeki K, Tsuchiya S, Okuno T, Fukui, Y, Kikuta J, Ishii M, Sugimoto Y, Yokomizo T, Nakao M.
Organizer
第51回日本免疫学会学術集会
Related Report
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