Daurinol Attenuates Autoimmune Arthritis Via Stabilization of Nrp1-PTEN-Foxp3 Signaling in Regulatory T Cells

Overview

Journal Front Immunol

Specialty Allergy & Immunology

Date 2019 Aug 6

PMID 31379809

Citations 8

Authors

Min-Jung Park

Su-Jin Moon

Eun-Jung Lee

Eun-Kyung Kim

Jin-Ah Baek

Se-Young Kim

Kyung Ah Jung

Seung Hoon Lee

Jeong Won Choi

Da-Som Kim

Jun-Ki Min

Sung-Hwan Park

Dongyun Shin

Mi-La Cho

Affiliations

Soon will be listed here.

Abstract

Optimizing Treg function and improving Treg stability are attractive treatment strategies for treating autoimmune rheumatoid arthritis (RA). However, the limited number of circulating Tregs and questions about the functional stability of -expanded Tregs are potential limitations of Treg-based cell therapy. The aim of this study was to analyze the regulatory effect of daurinol, a catalytic inhibitor of topoisomerase IIα, on Th cell differentiation and to evaluate their therapeutic potential in a preclinical experimental model of RA. We investigated the effect of daurinol on T cell differentiation by flow cytometry. Foxp3 stability and methylation were analyzed by suppression assays and bisulfite pyrosequencing. Daurinol was treated in the collagen-induced arthritis (CIA) model, and the effects were determined. We found that daurinol can promote Treg differentiation and reciprocally inhibit Th17 differentiation. This Treg-inducing property of daurinol was associated with decreased activity of Akt-mTOR and reciprocally increased activity of neuropilin-1 (Nrp1)-PTEN. Daurinol treatment inhibited aerobic glycolysis in Th17 conditions, indicating the metabolic changes by daurinol. We found that the daurinol increase the Treg stability was achieved by Foxp3 hypomethylation. daurinol treatment in CIA mice reduced the clinical arthritis severity and histological inflammation. The Treg population frequency increased and the Th17 cells decreased in the spleens of arthritis mice treated with daurinol. These results showed the anti-arthritic and immunoregulating properties of daurinol is achieved by increased differentiation and stabilization of Tregs. Our study provides first evidence for daurinol as a treatment for RA.

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