[CAS NO. 69659-80-9]  Tanshinone IIA sulfonate sodium

Sodium tanshinone IIA sulfonate (STS) inhibits the activity of CYP3A4 in a dose-dependent manner in the HLMs and CYP3A4 isoform. Other CYP isoforms, including CYP1A2, CYP2A6, CYP2C9, CYP2D6, CYP2E1, and CYP2C19, show minimal or no effect on the metabolism of STS. Thus, STS is a potent inhibitor for CYP3A4. STS upregulates the protein expression of Bcl-2 and downregulates the proteins expression of Bax and Caspase-3. Sodium tanshinone IIA sulfonate (STS) inhibits store-operated Ca2+ entry (SOCE) through store-operated Ca2+ channels (SOCC) via downregulating the expression of transient receptor potential canonical proteins (TRPC). STS treatment can effectively prevent the hypoxia-mediated inhibition of the PKG-PPAR-γ signaling axis in rat distal pulmonary arterial smooth muscle cells (PASMCs) and distal pulmonary arteries. It can also prevent hypoxia-mediated increases in intracellular calcium homeostasis and cell proliferation, by targeting and restoring the hypoxia-inhibited PKG-PPAR-γ signaling pathway in PASMCs.