生物活性 | |||
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描述 | Sennoside B can inhibit PDGF-stimulated cell proliferation by binding to PDGF(platelet-derived growth factor)-BB and its receptor and by down-regulating the PDGFR-beta signaling pathway[3]. The 50% inhibitory concentrations of the four sennosides (A, B, E and F) were 17, 9, 24 and 13 microM, respectively, and the type of inhibition by seenosides A and B with respect to allylamine as the substrate was non-competitive[4]. Intracaecal administration of rhein anthrone, the intraluminally active metabolite of sennosides A and B, to mice quickly induced severe diarrhoea[5]. From acute studies, sennosides could be classified as only slightly toxic in rats and mice after a single oral dose. The LD50 values were about 5,000 mg/kg in both species. In subacute studies with rats (max. 20 mg/kg) and dogs (max. 500 mg/kg), sennosides caused no specific local or systemic toxicity[6]. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
1.16mL 0.23mL 0.12mL |
5.80mL 1.16mL 0.58mL |
11.59mL 2.32mL 1.16mL |
参考文献 |
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