RESUMEN
ObjectiveAfter the brain and heart injuries were simulated by myocardial injury caused by acute cerebral ischemia， this study explored the mechanism of Naoxintong capsules in treating brain and heart injuries under cerebral ischemia state with Toll-like receptor （TLR） 2/TLR4 as the breakthrough point. MethodC57BL/6 male mice were randomly assigned into the sham operation， model， Naoxintong， and Ginaton groups. The middle cerebral artery occlusion （MCAO） method was used to establish a mouse model of cerebral ischemia. The neuroethological score， cerebral infarction area， cell apoptosis， ionized calcium-binding adaptor molecule 1 （IBA-1）-positive microglia proportion， and serum levels of N-terminal pro-brain natriuretic peptide （NT-proBNP）， creatine kinase-MB （CK-MB）， and lactic dehydrogenase （LDH） were determined to evaluate the pharmacodynamic effects of Naoxintong capsules on heart and brain injuries after cerebral ischemia in mice. Western blotting was employed to determine the expression of TLR2/TLR4 protein in the brain and heart of mice. ResultCompared with the sham operation group， the model group showed increased cerebral infarction area， neuroethological score， apoptosis rate， IBA-1-positive microglia proportion， and serum levels of NT-proBNP， CK-MB， and LDH （P<0.01）. Naoxintong capsules reduced the cerebral infarction area， neuroethological score， apoptosis rate， IBA-1-positive microglia proportion （P<0.01）， and serum NT-proBNP and CK-MB levels （P<0.05） in mice compared with the model group. Western blotting results showed that Naoxintong Capsules down-regulated the expression levels of TLR2 （P<0.05） in the brain and TLR2 （P<0.01） and TLR4 （P<0.05） in the heart. ConclusionCerebral ischemia can cause myocardial damage， reflecting the pathological process of cardiac injury after cerebral ischemia. Naoxintong capsules can mitigate brain and heart injuries after cerebral ischemia and achieve the simultaneous treatment of the brain and the heart， in which TLR2/TLR4 plays a role.