 The study evaluates the ability of transplanted mesenchymal stem cells, MSCs, to regulate TH17 TREG interactions in a rat Hashimoto's thyroiditis, HT, model system, showing that MSCs can reduce thyroid autoantibody levels, thyroid lesions, and lymphoid infiltration of the thyroid, as well as increase TREG cells and decrease TH17 cells, suggesting that MSCs could be a potential immunotherapy strategy for the treatment of Hashimoto's thyroiditis. This article was authored by Yeng Jingkou, Xiao Wenjin, Yu Mengsun, and others.