ABSTRACT
Abstract Propolis is a resinous substance collected and processed by Apis mellifera from parts of plants, buds and exudates. In Minas Gerais (MG) state, Brazil, green propolis is produced from the collection of resinous substance found in shoot apices of Baccharis dracunculifolia. This paper aims to investigate the chemical composition and in vitro antioxidant, anti-Helicobacter pylori, antimycobacterial and antiproliferative activities of essential oil (EO) from Brazilian green propolis (BGP-EO). The oil showed high antibacterial activity against H. pylori (MIC = 6.25 µg/mL), Mycobacterium avium (MIC = 62.5 µg/mL) and M. tuberculosis (MIC = 64 µg/mL). Its antioxidant activity was evaluated in vitro by both DPPH (IC50 = 23.48 µg/mL) and ABTS (IC50 = 32.18 µg/mL) methods. The antiproliferative activity in normal (GM07492A, lung fibroblasts) and tumor cell lines (MCF-7, HeLa and M059J) was analyzed by the XTT assay. BGP-EO showed inhibition of normal cell growth at 68.93 ± 2.56 µg/mL. Antiproliferative activity was observed against human tumor cell lines, whose IC50 values were 56.17, 66.43 and -65.83 µg/mL for MCF-7, HeLa and M059J cells, respectively. Its major constituents, which were determined by GC-FID and GC-MS, were carvacrol (20.7 %), acetophenone (13.5 %), spathulenol (11.0 %), (E)-nerolidol (9.7 %) and β-caryophyllene (6.2 %). These results showed the effectiveness of BGP-EO as a natural product which has promising biological activities.
Subject(s)
Propolis/chemistry , Anti-Infective Agents/pharmacology , Antioxidants/pharmacology , Brazil , Oils, Volatile/therapeutic use , Helicobacter pylori/drug effects , Mycobacterium avium/drug effects , Mycobacterium tuberculosis/drug effectsABSTRACT
A case of Mycobacterium avium arthritis in a 39-year-old female patient with mixed connective tissue disease (MCTD) was reported. An extra-articular abscess had formed outside the knee joint and extended down the calf. A culture was taken of the abscess and synovial fluid disclosed Mycobacteriun avium. This was resistant to most anti-tuberculosis agents. A combination of anti-tuberculosis drugs followed a total resection of the abscess. We concluded that M avium septic arthritis could insidiously develop into an extra-articular abscess. A combination of anti-tuberculosis drugs with a total resection of the abscess was an effective treatment.
Subject(s)
Adult , Female , Humans , Antitubercular Agents/therapeutic use , Arthritis, Infectious/microbiology , Knee Joint/microbiology , Mixed Connective Tissue Disease/complications , Mycobacterium avium/drug effects , Mycobacterium avium-intracellulare Infection/complicationsABSTRACT
La evaluación de la susceptibilidad de micobacterias tiene tres objetivos fundamentales: medir resistencia primaria, resistencia secundaria y ayudar a la toma de mejores decisiones terapéuticas en algunos pacientes. El estudio de resistencia mediante el método convencional está vigente pero adolece de lentitud en la obtención de resultados. Los métodos automatizados Bacte y permiten acortar esta espera a 7 a 10 días. Otros métodos en desarrollo para el estudio de la resistencia a fármacos antiturbeculosos son la epsilometría (E-test), detección mediante fagos, citometría de flujo y análisis genotípico. Se revisa someramente el principio biológico de cada uno y su utilidad clínico epidemiológica