Ubiquitin-Proteasome Modulating Dolabellanes and Secosteroids from Soft Coral Clavularia flava.

Abstract:

:We performed a high-content screening (HCS) assay aiming to discover bioactive molecules with proteasome inhibitory activity. By structural elucidation, we identified six compounds purified from soft coral Clavularia flava, which potentiates proteasome inhibition. Chemical structure elucidation revealed they are dolabellane- and secosteroid-based compounds including a new dolabellane, clavinflol C (1), three known dolabellanes, stolonidiol (2), stolonidiol-17-acetate (3), and clavinflol B (4) as well as two new secosteroids, 3,11-dihydroxy-24-methyl-9,11-secocholest-5-en-9,23-dione (5) and 3,11-dihydroxy-24-methylene-9,11-secocholest-5-en-9,23-dione (6). All six compounds show less cytotoxicity than those of known proteasome inhibitors, bortezomib and MG132. In summary, the high-content measurements of control inhibitors, bortezomib and MG132, manifest the highest ratio >2 in high-content measurement. Of the isolated compounds, 2 and 5 showed higher activity, followed by 3 and 6, and then 1 and 4 exhibited moderate inhibition.

journal_name

Mar Drugs

journal_title

Marine drugs

authors

Chiu CY,Ling XH,Wang SK,Duh CY

doi

10.3390/md18010039

subject

Has Abstract

pub_date

2020-01-03 00:00:00

issue

1

issn

1660-3397

pii

md18010039

journal_volume

18

pub_type

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