Título:	Antioxidant and Antimicrobial Activities of 7-Hydroxy-calamenene-Rich Essential Oils from Croton cajucara Benth.
Autoria:	AZEVEDO, M. M. B. CHAVES, F. C. M. ALMEIDA, C. A. BIZZO, H. R. DUARTE, R. S. CAMPOS-TAKAKI, G. M. ALVIANO, C. S. ALVIANO, D. S.
Afiliação:	Mariana M. B. Azevedo, UFRJ; FRANCISCO CELIO MAIA CHAVES, CPAA; Catia A. Almeida, IMPG-UFRJ; HUMBERTO RIBEIRO BIZZO, CTAA; Rafael S. Duarte, IMPG-UFRJ; Galba M. Campos-Takaki, Catholic University of Pernambuco; Celuta S. Alviano, IMPG-UFRJ; Daniela S. Alviano, IMPG-UFRJ.
Ano de publicação:	2013
Referência:	Molecules, v. 18, n. 1, p. 1128-1137, jan. 2013.
Conteúdo:	Croton cajucara is a shrub native to the Amazon region locally known as ?sacaca?. Two morphotypes are known: white and red ?sacaca?. The essential oils (EO) obtained by hydrodistillation from leaves of the red morphotype were, in general, rich in 7-hydroxycalamenene (28.4%?37.5%). The effectiveness of these EO regarding the antimicrobial activity against pathogenic microorganisms was initially investigated by the drop test method, showing significant inhibition zones. Among the microorganisms tested, the essential oils rich in 7-hydroxycalamenene were more effective against methicillin resistant Staphylococcus aureus (MRSA), Enterococcus faecalis, Mycobacterium tuberculosis, M. smegmatis, Mucor circinelloides and Rhizopus oryzae. The minimum inhibitory concentrations (MIC) of the oils were determined using the broth dilution assay. It was possible to observe that 7-hydroxycalamenene-rich oils presented high antimicrobial activity, with MIC of 4.76 × 10−3 μg/mL for MRSA, 4.88 μg/mL for M. tuberculosis, 39.06 μg/mL for M. smegmatis, and 0.152 μg/mL for R. oryzae and 3.63 × 10−8 μg/mL for M. circinelloides. The antioxidant activity of this EO suggests that 7-hydroxycalamenene provides more antioxidant activity according with EC50 less than 63.59 μg/mL. Considering the bioactive potential of EOs and 7-hydroxycalamenene could be of great interest for development of antimicrobials for therapeutic use in treatment of bacterial and fungal infections in humans and/or veterinary practice.
Thesagro:	Óleo Essencial
NAL Thesaurus:	Croton cajucara
Palavras-chave:	Sacaca
ISSN:	1420-3049
Digital Object Identifier:	10.3390/molecules18011128
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAA)