Steroidal saponins from Calamus insignis, and their cell growth and cell cycle inhibitory activities
Related Experiment Video
Updated: Aug 15, 2026

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach
Published on: June 23, 2026
Takashi Ohtsuki1, Masaaki Sato, Takashi Koyano
1Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 263-8522, Japan.
Abstract:
Three novel spirostanol-type (2, 3, and 5) and a furostanol-type (4) steroidal saponins were isolated from the stems of Calamus insignis (Palmae), along with a known steroidal saponin (1) by bioassay guided purification. The chemical structures of 1-5 were established on the basis of spectroscopic analysis and the result of acidic hydrolysis. Compounds 1, 2, 3, and 5 showed cell growth inhibitory activity against HeLa cells at a concentration of less than 10 microM, and 1 exhibited a cell cycle inhibitory effect at the G2/M stage at concentrations of 1.5 and 2.9 microM by flow cytometric analysis. This effect seems to be correlated with large expression of p21 and inhibition of dephosphorylation of cdc2 according to the result of Western blotting analysis.
More Related Videos
11:13Exploring the Pharmacological Action and Molecular Mechanism of Salidroside in Inhibiting MCF-7 Cell Proliferation and Migration
Published on: June 9, 2023
09:20Preclinical Assessment of the Bioactivity of the Anticancer Coumarin OT48 by Spheroids, Colony Formation Assays, and Zebrafish Xenografts
Published on: June 26, 2018
Related Concept Videos
Inhibition of Cdk Activity
Inhibition of CDK Activity
Molecular Factors Affecting Cell Division
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...
Calmodulin-dependent Signaling
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...