Candidiasis is an infectious disease caused by some fungi of the genus Candida. In Brazil, the incidence rate is higher than in European countries and the United States, and health problems occur mainly due to the virulence factors of the fungi, which have made treatment with commercial drugs difficult. Considering the context, plants rich in phenolic compounds, such as those of the genus Piper, have been studied due to their antimicrobial properties. Thus, the objective of this study was to isolate and characterize the essential oil of Piper rivinoides Kunth, as well as to analyze the bioactivity of this essential oil and the myristicin and elemicin isolates against opportunistic fungal pathogens. The broth microdilution method was used to identify the intrinsic activity of the isolated natural products alone and combined with fluconazole to obtain the 50% inhibitory concentration of the fungi (IC). Microdilution subculture assays were performed to determine the minimum fungicidal concentration. The results revealed moderate antifungal activity of P. rivinoides oil against C. tropicalis (512 μg/mL), C. albicans (1024 μg/mL), and P. kudriavzevii (512 μg/mL). Myristicin also showed moderate activity against C. albicans, C. tropicalis and P. kudriavzevii at 1024 μg/mL. As for elemicin, inhibition occurred at a concentration of 512 μg/mL for both strains, except against P. kudriavzevii, which was from 128 μg/mL. Combined with fluconazole, the products modified the drug's action, increasing its efficacy at concentrations ranging from 0.007 to 20.78 μg/mL, except for elemicin, which antagonized the drug's effect, modifying its action from 32.17 to 74.18 μg/mL against P. kudriavzevii. The antifungal effect of compounds, alone or in combination with fluconazole, was fungistatic, except for P. kudriavzevii, which was fungicidal in the isolated test with elemicin at concentrations starting from 128 μg/mL. Therefore, P. rivinoides and its isolated compounds have the potential for combination therapy with antifungals.
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http://dx.doi.org/10.1016/j.micpath.2024.107242 | DOI Listing |
Int J Environ Health Res
December 2024
Laboratory of Natural Resources and Management of Sensitive Environments, University of Oum El Bouaghi, Oum El Bouaghi, Algeria.
This study investigated the chemical composition and biological activities of essential oils extracted from Daucus biseriatus collected from the Algerian Sahara. Gas chromatography-mass spectrometry identified 57 compounds, constituting 97.09% of the oils, with myristicin (23.
View Article and Find Full Text PDFJ Dairy Sci
December 2024
Department of Animal and Dairy Sciences, University of Wisconsin - Madison, Madison, WI. Electronic address:
The objective of this study was to evaluate the effects of supplementing an essential oil blend (0.16 g/kg DM of carvacrol, eugenol, thymol, and capsaicin) and monensin (17.6 mg/kg DM TMR) on lactation performance, feeding behavior, and rumen fermentation of high-producing dairy cows.
View Article and Find Full Text PDFJ Dairy Sci
December 2024
Ruminant Nutrition and Emissions, Agroscope, 1700 Posieux, Switzerland. Electronic address:
Exhaled breath offers an interesting matrix of low invasive sampling of potentially relevant information about the organism's metabolism in the form of volatile organic compounds (VOC). The VOC can be exhaled by the ructus (Islam et al., 2023) or passed the blood-lung barrier for expiration through the lungs.
View Article and Find Full Text PDFFood Chem
December 2024
College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, PR China. Electronic address:
The processing techniques of camellia oil, containing freshly squeezed (FSCO), refined (DFCO), cold-pressed (OFCO), and hot-pressed (RFCO), significantly influence flavor compounds and organoleptic properties. In this study, the preference for FSCO and RFCO was revealed by sensory evaluation due to the "fruity" and "roasted" flavors, respectively. Flavor differences among oils were accurately distinguished by the E-nose.
View Article and Find Full Text PDFNat Prod Res
December 2024
Interdisciplinary Centre for Innovations in Biotechnology and Neuroscience, Faculty of Medical Sciences, University of Sri Jayewardenepura, Sri Lanka.
Cinnamon is a spice that is renowned for its several medicinal and cosmetic benefits. The research study examined the essential oil content, antioxidant, and anti-inflammatory properties of seven species native to Sri Lanka. Cinnamon bark and leaf samples were used to extract essential oils, methanol, and hexane.
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