RESUMEN
Blau syndrome (BS) is a rare autoinflammatory disorder characterized by the clinical triad of arthritis, uveitis, and dermatitis due to heterozygous gain-of-function mutations in the NOD2 gene. BS can mimic juvenile idiopathic arthritis (JIA)-associated uveitis, rheumatoid arthritis, and ocular tuberculosis. We report a family comprising a mother and her two children, all presenting with uveitis and arthritis. A NOD2 mutation was confirmed in all the three patients - the first such molecularly proven case report of familial BS from India.
Asunto(s)
Artritis/diagnóstico , ADN/genética , Técnicas de Diagnóstico Molecular/métodos , Mutación , Proteína Adaptadora de Señalización NOD2/genética , Sinovitis/diagnóstico , Uveítis/diagnóstico , Adulto , Artritis/genética , Artritis/metabolismo , Análisis Mutacional de ADN , Femenino , Humanos , India , Proteína Adaptadora de Señalización NOD2/metabolismo , Sarcoidosis , Microscopía con Lámpara de Hendidura , Sinovitis/genética , Sinovitis/metabolismo , Uveítis/genética , Uveítis/metabolismoRESUMEN
Excessive production and restricted elimination of free radicals like superoxide, hydroxyl radical (·OH), anion radical (O2 ·-), and non-radical hydrogen peroxide (H2O2) are related to the development of cancer, arteriosclerosis, arthritis and neurodegenerative diseases. According to a report of World Health Organisation, about 80% of the population living in the developing countries predominantly depends on the traditional medicine for their primary healthcare. Plants possess innate ability to synthesize a wide variety of enzymatic and non-enzymatic antioxidants capable of attenuating ROS-induced oxidative damage. The ethanolic leaf extracts of Syzygium jambos L. and Terminalia citrina Roxb. exhibited a significant in vitro antioxidant activity when compared with natural antioxidant, ascorbic acid. The extracts also provided strong cellular protection against the damaging effects of H2O2 induced oxidative stress in the mutant strains (tsa1Δ and sod1Δ) of Saccharomyces cerevisiae. The GC-MS analysis of the leaf extracts revealed the presence of phytoconstituents majorly constituting of terpenes, vitamin and fatty acids contributing to the antioxidant property. The plant extracts may serve as a potential source of exogenous antioxidants to combat the undesirable effects of oxidative stress.
RESUMEN
Wild edible mushrooms are one of the most fascinating nutraceuticals because of their pleasant texture, peculiar aroma, and tremendous therapeutic potential; they have been used since ancient times. In this study we evaluated the antioxidant potential of 4 wild edible mushrooms-Cantharellus tropicalis, C. cibarius, Lentinus edodes, and Russula delica-collected from Mizoram, India. We performed in vitro and in vivo studies using a Saccharomyces cerevisiae stress response mechanism as the model system. Among the 4 mushrooms, C. cibarius exhibited the most significant antioxidant activity both in vitro and in vivo, followed by L. edodes, R. delica, and C. tropicalis. Gas chromatography-mass spectrometry analysis of methanolic extracts of the mushrooms revealed the presence of substantial amounts of fatty acids, fatty acid esters, and other bioactive constituents. The in vitro antioxidant activity was corroborated by in vivo studies using an S. cerevisiae oxidative stress response mechanism. In spot assays, the C. cibarius methanolic extract showed the highest scavenging potential in wild and mutant (sodlΔ and tsalΔ) strains of S. cerevisiae. These results were confirmed further by determining the level of reactive oxygen species through the use of fluorescent microscopy and intensity studies. The results suggested the efficacy of wild edible mushrooms as prominent therapeutic agents and that they have tremendous nutraceutical properties.
Asunto(s)
Agaricales/química , Antioxidantes/metabolismo , Dieta , Saccharomyces cerevisiae/metabolismo , Agaricales/metabolismo , Antioxidantes/química , Antioxidantes/aislamiento & purificación , Ácidos Grasos/análisis , Depuradores de Radicales Libres/metabolismo , Cromatografía de Gases y Espectrometría de Masas , India , Oxidación-Reducción/efectos de los fármacos , Estrés Oxidativo/efectos de los fármacos , Especies Reactivas de Oxígeno/análisis , Verduras/química , Verduras/metabolismoRESUMEN
BACKGROUND: From ancient times, plants and plant-derived products have been used as folkloric medicines for a variety of health disorders owing to their tremendous therapeutic potential. The present study aimed to determine the antioxidant efficacy of crude Acacia nilotica extract in the oxidative stress response system of Saccharomyces cerevisiae as a model organism. RESULTS: Acacia nilotica showed significant antioxidant activity, with IC50 values of 75.157 and 159.57 µg mL-1 for 2,2-diphenyl-1-picrylhydrazyl radical and hydroxyl radical scavenging activities respectively at a concentration of 500 µg mL-1 . The total antioxidant activity of A. nilotica showed an ascorbic acid equivalent of 152.79 ± 7.43 µg mL-1 . The presence of phytoconstituents such as phytol and α-tocopherol from gas chromatography/mass spectrometry analysis confirmed the potential of A. nilotica as an antioxidant. The results were validated using the stress response mechanism in S. cerevisiae wild type and its isogenic deletion strains sod1Δ and tsa1Δ. Acacia nilotica substantially neutralized reactive oxygen species generated by hydrogen peroxide in mutant strains, as evident from spot assay and fluorescence assay using fluorescence microscopy and intensity studies. CONCLUSION: The results suggested the efficacy of A. nilotica as a potent antioxidant in the S. cerevisiae system for the first time and its use in neutraceuticals/therapeutics. © 2017 Society of Chemical Industry.