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2021 Fiscal Year Final Research Report

Development of a treatment for septic AKI using microRNAs and adipose stem cell-derived exosomes.

Research Project

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Project/Area Number 19K08676
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53040:Nephrology-related
Research InstitutionNagoya University

Principal Investigator

Noritoshi Kato  名古屋大学, 医学部附属病院, 講師 (90716052)

Co-Investigator(Kenkyū-buntansha) 前田 佳哉輔  名古屋大学, 医学部附属病院, 助教 (00836306)
丸山 彰一  名古屋大学, 医学系研究科, 教授 (10362253)
古橋 和拡  名古屋大学, 医学部附属病院, 病院講師 (50835121)
勝野 敬之  愛知医科大学, 医学部, 准教授 (60642337)
Project Period (FY) 2019-04-01 – 2022-03-31
KeywordsmiRNA / リポソーム / 敗血症 / 腎線維化
Outline of Final Research Achievements

In our previous studies, we have succeeded in suppressing hypercytokinemia and improving survival in sepsis model mice by systemic administration of a plasmid expressing miR-146a, which was mainly taken up by the spleen.
In this study, we focused on the spleen as a target for the treatment of sepsis and investigated the therapeutic effect of local injection into the spleen. We found that most of the nucleic acids after administration were taken up by the spleen, especially by splenic macrophages. While the therapeutic effect was protective against organ damage such as kidney and liver damage, this did not improve the survival rate. Therefore, the target disease and therapeutic miRNAs were changed, and the inhibitory effect on renal fibrosis caused by folic acid nephropathy was examined, and a certain inhibitory effect on fibrosis was confirmed.

Free Research Field

miRNA

Academic Significance and Societal Importance of the Research Achievements

核酸医薬は、細胞治療や抗体医薬と異なり安価に合成できること、また一度治療に関わるプロトコールが完成すれば、疾患ごとに治療ターゲットを変えて、核酸を載せ替えることで、プラットフォームの汎用性が高いことが特徴である。昨今のSARS-CoV-2感染の病態に、SIRSといった全身性の高サイトカイン血症の関与がうたわれているが、我々の既報から、SepsisによるSIRSの治療ターゲット臓器として脾臓をあげている点は新しく、今後議論が広まることを期待している。またリポソームと成熟miRNAによる治療実験の報告は散見されるが、知見を蓄積していく必要があり、本研究もそれに役立てて行きたい。

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Published: 2023-01-30  

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