Bioactive Metabolites Produced by Penicillium sp.1 and sp.2, Two Endophytes Associated with Alibertia macrophylla (Rubiaceae)

• Autor(a) principal: Oliveira, Camila M. [UNESP]
• Data de Publicação: 2009
• Outros Autores: Silva, Geraldo H., Regasini, Luis O. [UNESP], Zanardi, Lisineia M. [UNESP], Evangelista, Alana H. [UNESP], Young, Maria C. M., Bolzani, Vanderlan da Silva [UNESP], Araújo, Angela Regina [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.znaturforsch.com/ac/v64c/c64c.htm; http://hdl.handle.net/11449/26059
• topic: Penicillium; Alibertia macrophylla; Endophytic Fungi; Acetylcholinesterase

In the course of our continuous search for bioactive metabolites from endophytic fungi living in plants from the Brazilian flora, leaves of Alibertia macrophylla (Rubiaceae) were submitted to isolation of endophytes, and two species of Penicillium were isolated. The acetonitrile fraction obtained in corn from a culture of Penicillium sp.1 afforded orcinol (1). on the other hand, Penicillium sp.1 cultivated in potato-dextrose-broth furnished two different compounds, cyclo-(L-Pro-L-Val) (2) and uracil (3). The chromatographic fractionation of the acetonitrile fraction obtained from Penicillium sp.2 led to three dihydroisocoumarins, 4-hydroxymellein (4), 8-methoxymellein (5) and 5-hydroxymellein (6). Compounds 5 and 6 were obtained from the Penicillium genus for the first time. Additionally, metabolites 1-6 were evaluated for their antifungal and acetylcholinesterase (AChE) inhibitory activities. The most active compounds 1. and 4 exhibited detection limits of 5.00 and 10.0 mu g against Cladosporium. cladosporioides and C. sphaerospermum, respectively. Compound 2 showed a detection limit of 10.0 mu g, displaying potent AChE inhibitory activity.