Aspergillus candidus is a newly recognized source of sphaeropsidin A: Isolation, semi-synthetic derivatization and anticancer evaluation.

Abstract:

:This report details a search for alternative strains that produce the diterpenoid sphaeropsidin A (SphA) among A. candidus strains from the USDA Northern Regional Research Laboratories Culture Collection. We identified two strains that produced SphA using a limited set of test media. An initial scaled-up fermentation of NRRL 313 and isolation effort led to the procurement of sufficient quantities of SphA to prepare five semi-synthetic analogues (1-5) and evaluate their anticancer effects against glioblastoma cells D423 and Gli56 grown in 2D and 3D cultures. Although, the effectiveness of the synthetic analogues varied depending on the cell line and the type of cell culture, compound 5, bearing an aromatic ring at C16, displayed a stronger toxicity towards both D423 and Gli56 cell lines in 2D cultures and D423 spheroids in 3D culture than either SphA or compounds 1-4.

journal_name

Bioorg Med Chem Lett

authors

Li Y,Scott R,Hooper AR,Bartholomeusz GA,Kornienko A,Bills GF

doi

10.1016/j.bmcl.2017.11.001

subject

Has Abstract

pub_date

2017-12-15 00:00:00

pages

5436-5440

issue

24

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(17)31077-6

journal_volume

27

pub_type

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