Isolation and characterisation of a prenylated p-terphenyl metabolite of Aspergillus candidus possessing potent and selective cytotoxic activity; Studies on mechanism of action

Citation
P. Stead et al., Isolation and characterisation of a prenylated p-terphenyl metabolite of Aspergillus candidus possessing potent and selective cytotoxic activity; Studies on mechanism of action, J ANTIBIOT, 52(2), 1999, pp. 89-95
Citations number
10
Categorie Soggetti
Microbiology
Journal title
JOURNAL OF ANTIBIOTICS
ISSN journal
00218820 → ACNP
Volume
52
Issue
2
Year of publication
1999
Pages
89 - 95
Database
ISI
SICI code
0021-8820(199902)52:2<89:IACOAP>2.0.ZU;2-1
Abstract
We describe the discovery and proper-ties of a prenylated p-terphenyl metab olite of the fungus Aspergillus candidus. The compound (1) possesses potent cytotoxic activity against a range of tumour and other hyper-proliferative cell lines. Cell cycle analysis shows that in mouse keratinocyte (BALB/MK) cells treated with 1, the cell cycle is arrested in early S phase, indicat ive of an antimetabolite effect. Furthermore, cellular cytotoxicity can be reversed by addition of exogenous pyrimidine but not purine nucleosides to the cell culture medium. It is therefore likely that compound 1 selectively inhibits pyrimidine biosynthesis, and it is this property which accounts f or its potent cytotoxic properties.