title: New bioactive peroxides from marine sponges of the family plakiniidae.
abstract: In our continuing program to identify compounds with antifungal properties, the ethanol extracts of two sponges of the family Plakinidae were found to inhibit the growth of the fungal pathogens Candida albicans and Aspergillus fumigatus. From these organisms three new compounds and five known compounds have been identified. A new 1,2-dioxane ring peroxide acid, 1, has been isolated from the sponge Plakortis halichondrioides along with five known compounds. Two new 1,2-dioxolane peroxide acids, 3 and 4, have been isolated from the sponge Plakinastrella onkodes. The structures were established by interpretation of spectral data. The three new compounds exhibit moderate activity against the fungal pathogen C. albicans with MICs of 5, 1.6, and 1.6 microg/mL respectively, for 1, 3, and 4. Compound 1 also showed in vitro inhibition of the fungal pathogen A. fumigatus with an IC(90) value of 5.6 microg/mL.
authors.affiliation: Division of Biomedical Marine Research, Harbor Branch Oceanographic Institution, Inc., 5600 US 1 North, Ft. Pierce, Florida 34946, USA.
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen
authors.forename: Peter J
authors.initials: PJ
authors.lastname: McCarthy
authors.forename: Dedra K
authors.initials: DK
authors.lastname: Harmody
authors.forename: Rebecca
authors.initials: R
authors.lastname: Schimoler-O'Rourke
authors.forename: Katherine
authors.initials: K
authors.lastname: Chilson
authors.forename: Claude
authors.initials: C
authors.lastname: Selitrennikoff
authors.forename: Shirley A
authors.initials: SA
authors.lastname: Pomponi
authors.forename: Amy E
authors.initials: AE
authors.lastname: Wright
mesh_terms: D000818:Animals; D001232:Aspergillus fumigatus / Q000187:drug effects; D002176:Candida albicans / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D010545:Peroxides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D011161:Porifera / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D010545:Peroxides