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描述 | Tetrandrine is a high-affinity blocker of the type II, maxi-Ca(2+)-activated K+ channel of the rat neurohypophysial terminals. The non-inactivating component of ICa was inhibited by external tetrandrine in a voltage- and dose-dependent manner, with an IC50 = 10.1 microM. IKCa was elicited by depolarizations when approximately 10 microM Ca2+ was present on the cytoplasmic side. Only externally applied tetrandrine, at 1 microM, decreased the amplitude of IKCa, whereas the fast inward Na+ current and transient outward K+ current were not affected[3]. Tetrandrine enhanced the ubiquitination and degradation of Syk (spleen tyrosine kinase) and consequently repressed the osteoclastogenesis and bone destruction through the AhR-c-src-c-Cbl (aryl hydrocarbon receptor) pathway[4]. Furthermore, Tetrandrine is a bisbenzylisoquinoline alkaloid known to exhibit anticancer activity against different cancers. Dose- and time-dependant cytotoxic effect of tetradrine on both MDA-MB-231 and PANC-1 cells (pancreatic PANC-1 and breast MDA-MB-231 cancer cells) with IC50 values ranging between 51 and 54 μM and 22 and 27 μM for 24 h and 48 h of incubation respectively[5]. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
1.61mL 0.32mL 0.16mL |
8.03mL 1.61mL 0.80mL |
16.06mL 3.21mL 1.61mL |
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