xestospongin c

Xestospongin C ((-)-Xestospongin C) 是一种具有选择性的肌醇 1，4，5-三磷酸受体 (IP3R) 抑制剂，也是肌膜 内质网 Ca2+ ATP 酶 (SERCA) 的抑制剂，对 APP PS1 AD 小鼠认知行为和病理学具有神经保护作用，可减轻阿尔茨海默病 APP PS1 小鼠的认知和病理障碍。

Xestospongins and araguspongins, marine natural products originally isolated from sponges in the Pacific basin, exhibit vasodilatory effects. Inositol phosphates (IP) serve as crucial signal transduction messengers, activating IP3 receptors to facilitate Ca2+ release from intracellular stores. Araguspongin B specifically hinders the calcium-releasing function of inositol 1,4,5-trisphosphate at the receptor level within cerebral microsomes, demonstrating an inhibition concentration (IC50) of 0.6 µM. This potency places it nearly on par with xestospongin C in obstructing the IP3 receptor's activity.