High Performance Liquid Chromatography Method for the Determination of Anethole in Rat Plasma

Purpose: To identify and quantify anethole in the essential oil of fruits of Illicium verum Hook (star anise) and in vivo in rat plasma using reverse-phase liquid chromatography.Methods: Anethole was identified in the essential oil of the fruits of Star anise and determined by gas chromatography-tandem mass spectrometry (GC-MS), nuclear magnetic resonance (NMR), ultraviolet visible spectrophotometry (UV-VIS). A simple, sensitive and validated high performance liguid chromatography (HPLC) technique with UV-VIS detection method was developed for the determination of the compound in rat plasma using: methanol-water (85:15, v/v) as mobile phase at a flow rate of 0.2 ml/min Hypersil ODS Thermo (150 mm x 2.1 mm x 3.0 μM) as column with wavelength detection at 259 nm.Results: GC determination showed that anethole in the essential oil of star anise exhibited a retention time of 21.02 min. The validation results for anethole in plasma were satisfactory, with coefficient of determination (R2) of 0.9945 and relative standard deviation of < 3 %. HPLC run time of 4 min with a retention time of 2.73 min was the faster method to determine anethole when compared to a previously reported method which had a run time of 15 min.Conclusion: Anethole in the essential oil of Illicium verum Hook can be identified and determined by GC-MS, NMR and UV-VIS, and a superior HPLC method has been developed for the determination of the compound in rat plasma.Keywords: Anethole, High performance liguid chromatography, Star anise, Essential oil, Rat plasma, Illicium verum Hook

Ginger Essential Oil Ameliorates Cisplatin-Induced Nephrotoxicity in Mice

Purpose: To investigate the effect of ginger essential oil (GEO) in an experimental model of cisplatininduced nephrotoxicity.Methods: Male mice were divided into treatment six groups (n = 7), namely: Groups I (saline), II and III (cisplatin, 10 mg/kg, i.p.) euthanized in 3th and 6th days, respectively, and IV, V and IV (GEO, 100, 200 and 400 mg/kg/day, respectively, by gavage 3, 4, 5 and 6 days after cisplatin injection). Creatinine levels and protein/creatinine ratio were determined in plasma and urine, respectively. Bone morphogenic protein (BMP-7) and tumor necrosis factor (TNF-α) levels of kidney tissues were determined while mRNA expression levels were obtained using real-time polymerase chain reaction.Results: GEO treatment reduced significantly creatinine levels to 0.53 ± 0.02; 0.48 ± 0.008 and 0.46 ± 0.02 at 100, 200 and 400 mg/kg, respectively, compared with control (0.70 ± 0.01) [p<0.05] but increased protein : creatinine ratio to 0.21 ± 0.01, 0.22 ± 0.01, 0.24 ± 0.02 compared with control (0.06 ± 0.008) [p<0.05]. Pro-inflammatory TNF-α mRNA expression was decreased to 1.46 ± 0.21, 1.39 ± 0.19 and 1.36 ± 0.09, at GEO doses of 100, 200 and 400 mg/kg, respectively, while anti-fibrotic BMP-7 mRNA expression increased to 2.05 ± 0.26 and 2.44 ± 0.42 at doses of 200 and 400 mg/kg, respectively, compared with control (0.59 ± 0.39, p < 0.05).Conclusion: GEO treatment attenuates cisplatin-induced nephrotoxicity, in part, by modulating some inflammatory cytokines.Keywords: Zingiber officinale, Ginger, Roscoe, Essential oil, Nephrotoxicity, Cisplati

Anti-inflammatory Activity of Ocimum americanum L. Essential Oil in Experimental Model of Zymosan-Induced Arthritis

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Essential oils are potential sources of novel components for medicinal use. The present study was performed to investigate the composition and anti-inflammatory activity of Ocimum americanum L. essential oil (OEO) and its components in an experimental model of zymosan-induced arthritis and paw edema. The essential oil was obtained by hydro-distillation and analyzed by gas chromatography-mass spectrometry. Twenty-six components, representing 98.9% of the total oil, were characterized, with linalool (19.63%) and 1,8-cineole (17.27%) as the main components. The OEO and its two constituents inhibited leukocyte influx into the synovial space and reduced paw edema induced by zymosan. The OEO also inhibited interferon-gamma levels but did not reduce transforming growth factor-beta levels. Additionally, the OEO protected against leukocyte influx into the synovial membrane and cartilage destruction in knee joints in arthritic mice. These findings indicate that the essential oil of Ocimum americanum L. exerted significant anti-inflammatory effects, likely related to its main compounds.414913926Coordenadoria de Aperfeicoamento de Pessoal de Nivel SuperiorFundacao AraucariaConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Effect of Camphor on the Behavior of Leukocytes In vitro and In vivo in Acute Inflammatory Response

Purpose: To evaluate the effect of camphor on acute inflammatory  response by leukocytes on chemotaxis, antiedematogenic and phagocytic activities.Methods: The effect of camphor in acute inflammatory response evaluated by neutrophil chemotaxis, ear edema induced by croton oil, activity of the enzyme myeloperoxidase (MPO) and phagocytic activity of macrophages in Swiss mice.Results: Camphor treatment did not show any cytotoxicity. Camphor at 3, 10, and 30 ìg/ml doses exhibited significant (p < 0.01) reduction on leukocyte migration toward N-formyl methionyl leucyl phenylalanine fMLP. Topical treatment with camphor did not reduce significant ear edema or MPO activity at any of the doses tested. However, in contrast, oral treatment with 100 and 200 mg/kg camphor significantly (p < 0.01) reduced ear edema and myeloperoxidase (MPO) activity. Additionally, the phagocytic activity of macrophages was not affected by camphor.Conclusions: These results indicate that the anti-inflammatory activity of camphor may be related to the inhibition of leukocyte migration and antiedematogenic activity.Keywords: Camphor, Inflammatory response, Chemotaxis, Macrophages, Phagocytic, Leukocytes, Edem