TGFB1 and Parkinson disease: The regulatory impact of TGF-β1-mediated hOM-MSCs on inflammatory factors in the SN of the PD mouse model was evaluated by assessing the levels of both proinflammatory cytokines (IL-1β and TNF-α) and anti-inflammatory cytokines (IL-4 and IL-10) in the SN tissues from each experimental group.