Related Experiment Video
Updated: May 5, 2026

Collecting Marine Gnathiid Isopod Fish Parasites with Light Traps
Published on: September 25, 2023
Biscembranoids from the marine sponge Petrosia nigricans
Nguyen Xuan Nhiem1, Ngo Van Quang, Chau Van Minh
1lnstitute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam.
Abstract:
One new biscembranoid, petronigrione (1), and five known compounds, methyl tortuoate B (2), lobophytone U (3), lobophytone H (4), (24S)-ergostane 3beta, 5alpha, 6beta, 25 tetraol-25-monoacetate (5), and (24S)-ergostane-1beta, 3beta, 5alpha, 6beta, 25-pentaol-25-monoacetate (6), were isolated from the methanol extract of the marine sponge Petrosia nigricans. Their structures were established on the basis of spectral and chemical evidence. The cytotoxicity of all compounds was evaluated by MTT assay on four human cancer cell lines, HepG2, KB, LU-1, and MCF-7. Compounds 1 and 2 exhibited moderate cytotoxic activities on the four human cancer cell lines with IC50 values ranging of 20.7 - 28.9 microg/mL.
More Related Videos
11:55Streamlined Sampling and Cultivation of the Pelagic Cosmopolitan Larvacean, Oikopleura dioica
Published on: June 16, 2020
16:03A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms
Published on: January 11, 2015
Related Concept Videos
Diversity of Protists III
Diversity of Protists II
Bacterial Phylum Spirochaetes
Other Algae
Red Algae
Diversity of Protists I