Objective To investigate the protective effect of valeric acid on Doxorubicin-induced myocardial injury in mice.Methods C57BL/6J mice and AC16 cells were randomly divided into control group,injury group,and low-,medium-,and high-dose valeric acid groups.Doxorubicin was used to treat mice and myocardial cells to establish myocardial injury models.Hematoxylin-eosin(HE)staining was used to analyze the pathological changes of myocardial tissue in mice,and enzyme-linked immunosorbent assay(ELISA)was used to detect the levels of myocardial injury markers and inflammatory factors in mice from each group.Cell counting kit was used to detect the viability of myocardial cells in each group,and spectrophotometry was used to detect the levels of superoxide dismutase(SOD)and malondialdehyde(MDA)in the serum and myocardial cells in mice from each group.Reactive oxygen species(ROS)fluorescence probe was used to detect the levels of reactive oxygen species in each group,and flow cytometry was used to detect the apoptosis rate of each group.Western blot was used to detect the expression levels of nuclear factor erythroid 2-related factor 2(Nrf2)and heme oxygenase 1(HO-1)proteins in myocardial tissue and myocardial cells of mice from each group.Results Compared with the injury group,the myocardial injury in the low-,medium-,and high-dose valeric acid groups was ameliorated,the levels of myocardial injury markers gradually decreased,the levels of SOD in the body,and the expression levels of Nrf2 and HO-1 proteins gradually increased,and the levels of inflammatory factors,MDA,and apoptosis rate gradually decreased(P<0.05).Compared with myocardial cells in the injury group,the viability of myocardial cells,the levels of SOD,and the expression levels of Nrf2 and HO-1 proteins in the low-,medium-,and high-dose valeric acid groups gradually increased,while the levels of inflammatory factors,MDA,and apoptosis rate gradually decreased(P<0.05).Conclusion Valeric acid can inhibit inflammation and oxidative stress to improve Doxorubicin-induced myocardial injury,which may be related to the activation of Nrf2/HO-1 signaling pathway by valeric acid.

Objective To investigate the protective effect of valeric acid on Doxorubicin-induced myocardial injury in mice.Methods C57BL/6J mice and AC16 cells were randomly divided into control group,injury group,and low-,medium-,and high-dose valeric acid groups.Doxorubicin was used to treat mice and myocardial cells to establish myocardial injury models.Hematoxylin-eosin(HE)staining was used to analyze the pathological changes of myocardial tissue in mice,and enzyme-linked immunosorbent assay(ELISA)was used to detect the levels of myocardial injury markers and inflammatory factors in mice from each group.Cell counting kit was used to detect the viability of myocardial cells in each group,and spectrophotometry was used to detect the levels of superoxide dismutase(SOD)and malondialdehyde(MDA)in the serum and myocardial cells in mice from each group.Reactive oxygen species(ROS)fluorescence probe was used to detect the levels of reactive oxygen species in each group,and flow cytometry was used to detect the apoptosis rate of each group.Western blot was used to detect the expression levels of nuclear factor erythroid 2-related factor 2(Nrf2)and heme oxygenase 1(HO-1)proteins in myocardial tissue and myocardial cells of mice from each group.Results Compared with the injury group,the myocardial injury in the low-,medium-,and high-dose valeric acid groups was ameliorated,the levels of myocardial injury markers gradually decreased,the levels of SOD in the body,and the expression levels of Nrf2 and HO-1 proteins gradually increased,and the levels of inflammatory factors,MDA,and apoptosis rate gradually decreased(P<0.05).Compared with myocardial cells in the injury group,the viability of myocardial cells,the levels of SOD,and the expression levels of Nrf2 and HO-1 proteins in the low-,medium-,and high-dose valeric acid groups gradually increased,while the levels of inflammatory factors,MDA,and apoptosis rate gradually decreased(P<0.05).Conclusion Valeric acid can inhibit inflammation and oxidative stress to improve Doxorubicin-induced myocardial injury,which may be related to the activation of Nrf2/HO-1 signaling pathway by valeric acid.