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2023 Fiscal Year Final Research Report

Pathological analysis of severe asthma focusing on innate lymphoid cells and lipid mediators

Research Project

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Project/Area Number 21K08160
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53030:Respiratory medicine-related
Research InstitutionKagoshima University

Principal Investigator

Inoue Hiromasa  鹿児島大学, 医歯学域医学系, 教授 (30264039)

Co-Investigator(Kenkyū-buntansha) 高木 弘一  鹿児島大学, 医歯学総合研究科, 特任助教 (40707866)
町田 健太朗  鹿児島大学, 医歯学総合研究科, 客員研究員 (90597569)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywords喘息 / 自然免疫 / 脂質代謝 / PLA2
Outline of Final Research Achievements

We studied the association between innate lymphoid cells and lipid metabolism in asthma, focusing on sPLA2G3. In an ovalbumin (OVA)-induced asthma model, sPLA2G3 deficient mice exhibited enhanced airway hyperresponsiveness and eosinophilia compared to wild-type mice. We elucidated that LPA, the final metabolic product of sPLA2g3, suppresses cytokines derived from airway epithelial cells involved in innate immunity and negatively regulates allergen-induced asthmatic responses. In addition, we also studied the role of Death receptor 2 in the pathophysiology of asthma.

Free Research Field

喘息・COPD

Academic Significance and Societal Importance of the Research Achievements

これまでに喘息との関与が明らかにされていなかった脂質代謝に関わるsPLA2G3が、その最終代謝産物であるLPAを介して、喘息における自然免疫反応を抑制することを明らかにした。喘息における自然免疫反応はステロイド抵抗性を誘導し、喘息の難治化に関わることが示されており、今回の研究成果によりsPLA2G3やLPAが難治性喘息における新規治療標的となりうることが示唆され、新規治療薬の開発につながる可能性がある。

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Published: 2025-01-30  

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