Qingyangshengenin B 是一种分离自 Qingyangshen 的 C-21 甾体苷。它能够在 mRNA 水平上抑制 Aβ 的表达来减少 Aβ 的沉积，对 Aβ 的毒性有保护作用。它具有抗癫痫作用。

Qingyangshengenin B is a C-21 steroidal glycoside isolated from Qingyangshen. Qingyangshengenin B protects against Aβ toxicity, which decreases Aβ deposition by decreasing the expression of Aβ at the mRNA level. Qingyangshengenin B has antiepileptic and anti-aging effects, it can extend lifespan, increase heat stress-resistance, delay body paralysis, and increase the chemotaxis response in C. elegans models of Alzheimer's disease. Otophylloside B can suppress the seizure-like locomotor activity caused by pentylenetetrazole in zebrafish.

Otophylloside B (Ot B)?could modestly extend the lifespan of C. elegans, delay the age-related decline of body movement and improve the stress resistance.?Further investigating the molecular mechanism of lifespan extension effect revealed that Ot B could activate the FOXO transcription factor DAF-16.?Ot B could not further extend the lifespan of long-lived mutant of insulin/IGF-1-like receptor (daf-2).?In addition, Ot B also requires SIR-2.1 and CLK-1 which is an enzyme in ubiquinone synthesis, for lifespan extension.

106758-54-7

C49H78O16

923.13

青阳参甙元B;Otophylloside B;青阳参苷元B

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