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2021 Fiscal Year Final Research Report

A novel strategy to expand regulatory T cells by topical application of active vitamin D3

Research Project

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Project/Area Number 20K23014
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0907:Oral science and related fields
Research InstitutionTohoku University

Principal Investigator

Tanaka Yukinori  東北大学, 大学病院, 講師 (60637958)

Project Period (FY) 2020-09-11 – 2022-03-31
Keywords制御性 T 細胞 / 樹状細胞 / 活性型ビタミン D3 / 皮膚免疫
Outline of Final Research Achievements

Regulatory T cells (Tregs) function to suppress excessive immune responses, and therapeutic strategies to augment Tregs are promising for the treatment of autoimmune and inflammatory diseases. In this study, we aimed to elucidate the mechanism underlying systemic Treg proliferation by topical application of active vitamin D3 to establish this method as a new Treg-based therapy. We found that topical application of active vitamin D3 stimulates skin dendritic cells in a TSLP-dependent manner and they promote Treg proliferation in the skin-draining lymph nodes.

Free Research Field

免疫学

Academic Significance and Societal Importance of the Research Achievements

Treg 増殖を促進し過剰な免疫応答を抑制する治療法としては、慢性移植片対宿主病(GVHD)に対する低用量 IL-2 療法が代表的である。皮膚への活性型ビタミン D3 塗布による Treg 増殖誘導法は、皮膚を利用して全身の免疫バランスを調節するという新しい発想に基づいており、低用量 IL-2 ほど強力ではないものの、簡便かつ安価である。本研究はその臨床応用に向け、マウスモデルで Treg 増殖機構を明らかにしたものである。

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Published: 2023-01-30  

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