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Bufadienolides and polyhydroxycholestane derivatives from Bufo bufo gargarizans.

Yan-Min Wang¹, Zong-Yun Li, Jing-Jing Wang

¹a Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences , Beijing 100700 , China.

Journal of Asian Natural Products Research

|March 31, 2015

Summary

Researchers isolated a novel polyhydroxycholestane sulfate ester from toad skin. Steroidal metabolite profiles reveal significant chemical differences across various toad body parts, including venom and skin.

Keywords:

Bufo bufo gargarizans bufadienolide polyhydroxycholestane sulfate toad skin toad venom

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Reproductive Techniques for Ovarian Monitoring and Control in Amphibians

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Published on: May 12, 2019

Area of Science:

Natural Product Chemistry
Marine Biology
Biochemistry

Background:

Toad skin and venom are sources of diverse bioactive compounds.
Steroidal metabolites play crucial roles in biological functions.
Understanding chemical diversity in amphibians is important for drug discovery.

Purpose of the Study:

To isolate and characterize novel steroidal compounds from toad skin.
To compare the steroidal metabolite profiles of different toad tissues.
To investigate the chemical composition of Bufo bufo gargarizans Cantor.

Main Methods:

Isolation of compounds using chromatographic techniques.
Structure elucidation using Nuclear Magnetic Resonance (NMR) spectroscopy (1D and 2D).
High-Resolution Electrospray Ionization Mass Spectrometry (HR-ESI-MS) for molecular formula determination.
High-Performance Liquid Chromatography (HPLC) and Liquid Chromatography-Mass Spectrometry (LC-MS) for metabolite profiling.

Main Results:

A new polyhydroxycholestane sulfate ester, 3α,12β,25,26-tetrahydroxy-7-oxo-5β-cholestane 26-O-sulfate (1), was successfully isolated and characterized.
Steroidal metabolite profiles differed significantly between toad venom, skin, and stratum corneum.
HPLC and LC-MS analyses confirmed distinct chemical compositions in different tissues.

Conclusions:

The study identified a novel steroidal compound from Bufo bufo gargarizans Cantor skin.
Significant chemical divergence exists in steroidal metabolites across different toad tissues.
These findings contribute to the understanding of amphibian chemical ecology and potential pharmaceutical applications.