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Transient Expression in Nicotiana Benthamiana Leaves for Triterpene Production at a Preparative Scale

Transient Expression in Nicotiana Benthamiana Leaves for Triterpene Production at a Preparative Scale

Published on: August 16, 2018

Sesquiterpenes from Laurencia similis.

Hua Su¹, Da-Yong Shi, Jing Li

¹Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China. qdshua@sina.com

Molecules (Basel, Switzerland)

|May 28, 2009

Summary

Researchers isolated sixteen sesquiterpenes, including one new compound, from the marine red alga Laurencia similis. None of the isolated sesquiterpenes showed significant cytotoxicity against a human liver adenocarcinoma cell line.

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A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products

A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products

Published on: October 4, 2019

Area of Science:

Marine Natural Products Chemistry
Phytochemistry
Organic Chemistry

Background:

Marine red algae, particularly from the Laurencia genus, are known sources of diverse bioactive secondary metabolites.
Sesquiterpenes are a class of terpenoids derived from isoprene units, often exhibiting complex structures and biological activities.

Purpose of the Study:

To isolate and characterize sesquiterpenes from the marine red alga Laurencia similis.
To evaluate the cytotoxic potential of the isolated compounds against a human liver adenocarcinoma cell line.

Main Methods:

Extraction and isolation of compounds from Laurencia similis using chromatographic techniques.
Structure elucidation of isolated compounds utilizing Nuclear Magnetic Resonance (NMR) spectroscopy and comparison with existing literature.
Cytotoxicity assay performed on the BEL7402 tumor cell line.

Main Results:

One novel sesquiterpene, (4E)-1-bromo-5-[(1'S*,3'R*)-3'-bromo-2',2'-dimethyl-6'-methylenecyclohexyl]-3-methylpent-4-ene-2,3-diol (1), was identified.
Fifteen known sesquiterpenes (2-16) were isolated, with compounds 2-9 and 16 being reported from this species for the first time.
All sixteen isolated sesquiterpenes exhibited no significant cytotoxicity against the BEL7402 cell line, with IC(50) values greater than 10 microg/mL.

Conclusions:

The marine red alga Laurencia similis yielded a rich profile of sesquiterpenes, including a new brominated derivative.
Despite the structural diversity, the isolated sesquiterpenes did not demonstrate cytotoxic activity against the tested human liver cancer cell line.
This study contributes to the chemical understanding of Laurencia species and highlights the need for further investigation into the bioactivity of marine natural products.