2023 Fiscal Year Final Research Report
Exploring the relationship between changes in cellular metabolism within the pancreatic islet environment and the progression of autoimmune diabetes
Project/Area Number |
21K08558
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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 54040:Metabolism and endocrinology-related
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Research Institution | Nagasaki University |
Principal Investigator |
Niri Tetsuro 長崎大学, 医歯薬学総合研究科(医学系), 助教 (10782550)
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Co-Investigator(Kenkyū-buntansha) |
阿比留 教生 長崎大学, 医歯薬学総合研究科(医学系), 客員研究員 (00380981)
赤澤 諭 長崎大学, 原爆後障害医療研究所, 助教 (50549409)
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Project Period (FY) |
2021-04-01 – 2024-03-31
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Keywords | NODマウス / 1型糖尿病 / 膵島自己免疫 |
Outline of Final Research Achievements |
In adoptive transfer experiments using CD4+ T cells harvested from IRF4-deficient BDC2.5Tg NOD mice, analysis of the islet-infiltrating cells of adoptively transferred recipients revealed new insights into IRF4 dose-dependent T cell proliferation and promotion of differentiation into Th1/Th17 double-positive cells. Furthermore, in vitro stimulation experiments with strong antigens showed a slight decrease in T-cell proliferation capacity in the IRF4-deficient group, although extreme cell proliferation and T-cell differentiation dependent on IRF4 dosage were not observed. Additionally, under TCR stimulation conditions, the aerobic glycolysis capability of IRF4-deficient CD4+ T cells was reduced.
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Free Research Field |
内分泌・代謝学
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Academic Significance and Societal Importance of the Research Achievements |
抗原特異的BDC2.5 CD4+ T細胞におけるIRF4発現用量依存性の糖尿病進展形成の要因として、活性化T細胞の機能変化と、解糖系優位の代謝変化の関連性が示唆された。IRF4発現調整そのものを目的とした治療は、広範な免疫不全などの副作用が危惧される。しかし、今回我々が示したT細胞代謝活性化の抑制など、IRF4関連の免疫細胞を標的とした1型糖尿病治療開発や、T細胞マーカーとしてのIRF4発現モニタリングによる機能的T細胞診断など、今後の臨床応用への展望が期待される。
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