Inhibition of cyclooxygenase activity by standardized hydroalcoholic extracts of four Asteraceae species from the Argentine Puna

 

Autores
Isla, Maria Ines; Alberto, Maria Rosa; Zampini, Iris Catiana
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2009
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
We determined the anti-inflammatory activity of standardized extracts of four medicinal plant species (Baccharis incarum, B. boliviensis, Chuquiraga atacamensis, Parastrephia lucida) that grow in the Argentine Puna (3800 m above sea level) and that are used to reduce oxidative stress and alleviate gout and arthritic pain. The extracts of plant aerial parts were standardized in terms of total phenolic compounds and flavone/flavanone content and free radical scavenging activity. All extracts showed high phenolic compound concentration (0.5-1.6 mg/mL), mainly flavones and flavonols (0.1-0.8 mg/mL). The extracts showed hydrogen donating ability (DPPH and ABTS) and reactive oxygen species scavenging activity (O2 •-, OH-, H 2O2). The ability of the extracts to inhibit cyclooxygenase enzymes (COX-1 and COX-2) was determined by calculating percent inhibition of PGE2 production measured by enzyme immunoassay. All extracts inhibited both enzymes with IC50 values of 2.0 to 16.7 μg/mL. The anti-inflammatory activity of B. incarum and C. atacamensis extracts was higher than that of B. boliviensis and P. lucida. The IC 50 values obtained for indomethacin were 0.11 and 0.78 μM for COX-1 and COX-2, respectively. The present results are consistent with the anecdotal use of these species in phytotherapic preparations.
Idioma
inglés
OAI Identifier
oai:ri.conicet.gov.ar:11336/54677
Enlace del recurso
http://hdl.handle.net/11336/54677
Nivel de acceso
Acceso abierto
Materia
ANTI-INFLAMMATORY ACTIVITY
BACCHARIS BOLIVIENSIS
BACCHARIS INCARUM
CHUQUIRAGA ATACAMENSIS
CYCLOOXYGENASE
PARASTREPHIA LUCIDA
Otras Ciencias Biológicas
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS