N,N'-Dimethylthiourea (DMTU), isolated from Allii Sativi Bulbus, is an orally active scavenger of hydroxyl radical (•OH) and blocks •OH production by activated neutrophils in vitro. N,N'-Dimethylthiourea protects against water-immersion restraint stress (WIRS)-induced gastric mucosal lesions in rats by exerting its antioxidant action including •OH scavenging and anti-inflammatory action[1][2].
N,N'-Dimethylthiourea (DMTU; 1, 2.5, or 5 mmol/kg; orally) administered at 0.5 h before the onset of WIRS reduces the severity of gastric mucosal lesions with attenuation of the changes in the levels of gastric mucosal MPO, pro-inflammatory cytokines, LPO, NOx, nonprotein SH, and vitamin C and gastric adherent mucus found at 3 h after the onset of WIRS in a dose-dependent manner in Male Wistar rats aged 6 weeks[1].
[1]. Yoshiji Ohta, et al. Protective effect of N,N'-dimethylthiourea against stress-induced gastric mucosal lesions in rats. Fundam Clin Pharmacol. 2017 Jun;31(3):319-328. [2]. Zhongyi Zhang, et al. Analysis of volatile compounds in fermented black garlic by GC-MS.