Antiproliferative effect of extract from endophytic fungus Curvularia trifolii isolated from the "Veracruz Reef System" in Mexico.
BACKGROUND
It is well known that marine fungi are an excellent source of biologically active secondary metabolites, and by 2011, it was reported that over 400 bioactive metabolites were derived from marine fungi.


OBJECTIVE
This study establishes the basis for future research on antiproliferative compounds of marine endophytes inhabited in the Veracruz Reef System.


METHODS
Isolation of the 34 fungal strains was carried out by microbiological method from samples of sponges, corals, and other biological material from the Veracruz Reef System. The fungal biomass and broth were separated and extracted with a mixture of solvents MeOH:CHCl3. Characterization and molecular identification of the fungal strains were performed through microbiological methods and the analysis of the ITS-rDNA regions. Antiproliferative activity was tested at a dose of 250 μg/mL on human solid tumor cell lines HBL-100, HeLa, SW1573, T-47D, and WiDr by the SRB assay after 48 h-exposure to the fungal extracts.


RESULTS
The extracts from five isolates showed an antiproliferative effect against one or more of the tested cell lines (percentage growth < 50%). The mycelial extract from the isolate LAEE 03 manifested the highest activity against the five cell lines (% PG of 17 HBL-100, 19 HeLa, 23 SW1573, -6 T-47D, and 10 WiDr) and the strain was identified as Curvularia trifolii (Kauffman) Boedijn (Pleosporaceae).


CONCLUSIONS
The results obtained indicate that the extract from a marine derived C. trifolii has the antiproliferative effect, thus suggesting that this organism is a good candidate for further analysis of its metabolites.
a Doctorado en Ciencias Biomédicas , Universidad Veracruzana , Xalapa-Veracruz , México ;
Alan
A
Couttolenc
b Laboratorio de Alta Tecnología de Xalapa , Universidad Veracruzana , Xalapa-Veracruz , México ;
Cesar
C
Espinoza
c Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna , La Laguna, Spain ;
José J
JJ
Fernández
c Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna , La Laguna, Spain ;
Manuel
M
Norte
c Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna , La Laguna, Spain ;
Gabriela B
GB
Plata
c Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna , La Laguna, Spain ;
José M
JM
Padrón
d Department of Mycology and Algology, Faculty of Biology , Moscow Lomonosov State University , Moscow , Russia.
Alla
A
Shnyreva
b Laboratorio de Alta Tecnología de Xalapa , Universidad Veracruzana , Xalapa-Veracruz , México ;
Ángel
Á
Trigos
D000970:Antineoplastic Agents / Q000302:isolation & purification / Q000494:pharmacology*; D049109:Cell Proliferation / Q000187:drug effects*; D057894:Coral Reefs; D060026:Endophytes / Q000145:classification / Q000235:genetics / Q000378:metabolism*; D005658:Fungi / Q000145:classification / Q000235:genetics / Q000378:metabolism*; D006367:HeLa Cells; D006801:Humans; D010802:Phylogeny; D021521:Ribotyping; D012623:Seawater / Q000382:microbiology*; D014871:Water Microbiology
D000970:Antineoplastic Agents
Antitumor activity; bioactive natural products; bioprospecting; marine fungi