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Troxerutin Abrogates Ischemic/Reperfusion-Induced Brain Injury through Ameliorating Oxidative Stress and Neuronal Inflammation by Inhibiting the Expression of NLRP3 in Sprague Dawley Rats.

Cerebral ischemic reperfusion (I/R) infarction is mostly associated with serious brain injury, cognitive damage, and neurological deficits. The oxidative stress mechanisms in the neurological region lead to higher reactive oxygen species production followed by oxidative stress, inflammation of neurons, and death of brain cells. The current work aims to evaluate the effect of troxerutin (TXN) on cerebral injury stimulated by I/R-induced ischemic stroke and examines the mechanistic effect of TXN on neuroinflammation in the Sprague Dawley model. The experimental rats were randomized in to four groups: (i) sham control, (ii) I/R + vehicle, (iii) I/R + 10 mg/kg bw TXN, and (iv) I/R + 20 mg/kg bw TXN. In the TXN administration and control, groups were injected intraperitoneally 15 min before reperfusion and every day for 7 days, except the sham group. Orally administered TXN (10 and 20 mg/kg/bw) modulated the water content, lowered the infarct volume, and abrogated score defects of neuron and changes in the brain tissue sample. In our study, the TXN-stimulated cerebral injury exhibited leakage of thiobarbituric acid reactive substances (TBARS), lipid hydroperoxides (LOOH) of the neuronal sample of tissues and showed higher antioxidant enzymes superoxide dismutase, catalase, the oxidized form of glutathione peroxidase, and the reduced form of glutathione levels. This biochemical result was additionally proved by histopathological assessment. Changes were made in antioxidant and inflammatory markers expressions interleukin-6 (IL-6), IL-4, IL-10, vascular endothelial growth factor, and cerebral induced rats. The overall findings showed that TXN protected the brain tissues from neuroinflammatory oxidative stress by reducing cerebral injury in Sprague Dawley rats. Further, the messenger RNA expression of cerebral I/R-induced animal tissues down-regulated NLRP3, caspase-1, tumor necrosis factor-α, ASC, IL-1β, and Toll-like receptor 3 (TLR3). Therefore, the TXN action on TLR3 induced brain stroke is an excellent therapeutic approach for brain damage.