1,4,5-ip3

BHPI is a potent inhibitor of nuclear estrogen–ERα-regulated gene expression. Elicits sustained ERα-dependent activation of the endoplasmic reticulum (EnR) stress sensor, the unfolded protein response (UPR), and persistent inhibition of protein synthesis.

D-myo-Inositol 1,4,5-trisphosphate hexapotassium salt is a second messenger that promotes the release of calcium ions from the endoplasmic reticulum.

ARN 11391是ITPR1 (Inositol 1,4,5-trisphosphate (IP3) receptor type 1)的增效剂，它直接作用于ITPR1，从而增强细胞内钙离子信号。ARN 11391还能增强表达突变型ITPR1细胞中的钙信号，这与SCA29型脊髓小脑共济失调有关。

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.