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2023 Fiscal Year Final Research Report

Elucidation of the mechanism of aggravation of infectious diseases in diabetic patients

Research Project

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Project/Area Number 22K20934
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0905:Surgery of the organs maintaining homeostasis and related fields
Research InstitutionTohoku University

Principal Investigator

Sampei So  東北大学, 大学病院, 助教 (60966646)

Project Period (FY) 2022-08-31 – 2024-03-31
Keywords敗血症 / 血管内皮グリコカリックス / 糖尿病
Outline of Final Research Achievements

Inflammation was induced in diabetic model mice and control wild-type mice using LPS, and 6 hours later, the lungs, hearts, kidneys, and livers of both mice were removed and immunohistostained using an anti-IL-1β antibody.Almost no IL-1β positive cells were observed in the lungs and heart, but accumulation of positive cells was observed in the kidney and liver. Next, to evaluate pyroptosis in vascular endothelial cells, we performed double fluorescence staining using anti-CD31 antibody, anti-caspase-1 antibody, and anti-NLRP3 antibody. Caspase-1 and NLRP3 were detected in vascular endothelial cells in the lungs and kidneys. It was found that they colocalized.

Free Research Field

救急医学

Academic Significance and Societal Importance of the Research Achievements

糖尿病患者は感染症に罹患すると重症化することが多く、死亡率が高いが、重症化予防のための治療法は確立していない。重症化や転帰不良の機序として、免疫機能低下が報告されているが、感染急性期の過剰炎症による臓器障害もその一因であることが示唆されている。
本研究では過剰炎症の原因について血管内皮細胞に着目し、その傷害がpyroptosisを起こし炎症を持続させると仮定し、IL-1β産生細胞やpyroptosisを起こす細胞の同定を試みたところ、臓器によって障害の程度に差異がありそうなことが判明した。即ち障害されやすい臓器にアプローチすることで、過剰炎症を改善し、転帰を完全する足がかりとなる可能性がある。

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Published: 2025-01-30  

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