OBJECTIVES: To investigate the inhibitory effect of FER-1 on methylglyoxal-induced ferroptosis in cultured mouse alveolar macrophages. METHODS: MH-S cells derived from mouse alveolar macrophages treated with 90 μg/mL methylglyoxal, 10 μmol/mL FER-1MG+FER-1, or both were examined for intracellular reactive oxygen species (ROS), malondialdehyde (MDA) and ferrous ion (Fe²⁺) levels and changes in mitochondrial membrane potential. Western blotting was performed to detect the protein expression levels of glutathione peroxidase 4 (GPX4) and long-chain acyl-CoA synthase 4 (ACSL4). RESULTS: Methylglyoxal treatment of MH-S cells for 24 h significantly decreased the protein expression level of GPX4, upregulated the protein expression of ACSL4, increased intracellular concentrations of ferrous ions, ROS and MDA, caused loss of mitochondrial membrane potential, and decreased cell viability. Treatment of the cells with FER-1 effectively attenuated these detrimental effects of methylglyoxal in MH-S cells by increasing GPX4 expression, reducing ACSL4 expression and intracellular ferrous ions, ROS and MDA levels, and restoring the mitochondrial membrane potential. CONCLUSIONS Methylglyoxal can induce ferroptosis in MH-S cells in a dose-dependent manner, and FER-1 can rescue the cells from methylglyoxal-induced ferroptosis.
Animals ; Ferroptosis/drug effects* ; Mice ; Pyruvaldehyde ; Macrophages, Alveolar/drug effects* ; Reactive Oxygen Species/metabolism* ; Phospholipid Hydroperoxide Glutathione Peroxidase/metabolism* ; Membrane Potential, Mitochondrial/drug effects* ; Coenzyme A Ligases/metabolism* ; Malondialdehyde/metabolism* ; Cell Survival/drug effects*

Objective:To investigate the clinical curative effect of Titanoreine suppositories combined with hypertonic magnesium sulfate solutions in the treatment of postpartum hemorrhoids acute attack. Methods:Totally 58 patients with postpartum hemorrhoids a-cute attack in our hospital from August 2012 to August 2013 were randomly divided into the observation group and the control group, 29 cases in each. The control group was treated with Titanoreine suppositories combined with hemorrhoids suppositories, and the observa-tion group was treated with Titanorein suppositories combined with hot compress using 50% sulfur acid magnesium liquids on the basis of sitz bath with potassium permanganate liquids. After the 7-day treatment, the clinical curative effect and adverse reactions were com-pared between the two groups. Results:The total effective rate in the observation group was 89. 7%(26/29), which was significantly higher than that in the control group 58. 6%(17/29). The pain relief rate on the first day was 93. 1% (27/29) in the observation group, which was also significantly higher than that in the control group 58. 6%(17/29) with statistically significant difference ( P<0. 01). Conclusion: Titanoreine suppositories combined with hypertonic magnesium sulfate solutions in the treatment of postpartum hemorrhoids acute attack is with rapid onset of action and obvious curative effect.