Tanshinone IIA is a lipophilic
abietane diterpene compound, which exhibits protective effects against ischaemia/
reperfusion injury; however, the pathways responsible for the myocardial protective activities of
tanshinone IIA remain to be elucidated. The aim of the present study was to investigate the effect of
tanshinone IIA on the Janus‑activated
kinase (JAK)/signal transducer and activator of transcription (STAT) signaling pathway, which is associated with cardiac dysfunction during
ischemia/reperfusion. The results demonstrated that
tanshinone IIA protected myocardial cells from
hypoxia/ischemia‑induced injury in vitro and recovered decreased cell viability due to activation of the JAK2/STAT3 pathway, with 10 µM
tanshinone IIA exhibiting the most potent protective effects. Flow cytometric analysis revealed that
tanshinone IIA reversed the apoptotic aggravation induced by JAK2/STAT3 inhibitors following hypoxic
ischemia. However, JAK2 inhibitors promoted the myocardial protective effect of
tanshinone IIA from hypoxic‑ischemic injury. Furthermore,
tanshinone IIA and JAK2/STAT3 inhibitors in combination augmented the protection of myocardial cells from apoptosis induced by
ischemia/reperfusion preconditioning in vivo. In conclusion, the results of the present study indicated that JAK2/STAT3 inhibitors may enhance the protective effect of
tanshinone IIA on cardiac myocytes from hypoxic
ischemia-induced injury, therefore suggesting that JAK2/STAT3 inhibitors may have a potential application in combination
therapies with
tanshinone IIA.