Antioxidant activity and phenolic content of leaf infusions of Myrtaceae species from Cerrado (Brazilian Savanna)

Takao, Leandro Kenji; Imatomi, Maristela; Gualtieri, Sônia Cristina Juliano

doi:10.1590/1519-6984.03314

Cited by 61 publications

(46 citation statements)

References 26 publications

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“…The percentage of DPPH sequestration was 88.33% and the IC50 was 2.80 for the essential oil, while those values were 94.58% and 1.39, respectively, for BHT . (TAKAO et al, 2015) as did M. oblongata in this study.…”

Section: Antioxidant Activitysupporting

confidence: 52%

Chemical composition of essential oil from Myrcia oblongata DC and potencial antimicrobial, antioxidant and acaricidal activity against Dermanyssus gallinae (Degeer, 1778)

Santana¹,

Souza²,

Coracini³

et al. 2018

Biosci. J.

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ABSTRACT:Essential oils have aroused interest in the industrial sector due to the multitude of potential applications, especially with respect their antimicrobial and antioxidant properties, among others. The objective of this study was to determine the chemical composition of the essential oil from the leaves of Myrcia oblongata DC by gas chromatography coupled to mass spectrometry (GC-MS). To evaluate the antioxidant potential of the oil by using the free radical capture method with 2,2-diphenyl-1-picryl hydrazyl (DPPH); to test the oil antimicrobial activity using the broth microdilution method; and to evaluate the repellency and fumigant potential of the oil on Dermanyssus gallinae (Degeer, 1778). The GC-MS analysis resulted in the identification of 30 oil constituents, with the bulk of the composition identified as caryophyllene oxide (22.03%) and trans-verbenol (11.94%). The oil presented moderate antioxidant activity compared to the synthetic antioxidant 2,6-di-tert-butyl-4-hydroxytoluene (BHT). Antimicrobial activity of the essential oil showed an inhibitory activity on Gram-positive bacteria, Enterococcus faecalis, Staphylococcus aureus, Bacillus subtilis and Staphylococcus epidermidis and for the yeast Candida albicans, and showed no activity against Gram-negative bacteria. All concentrations of the essential oil used in the fumigation test on D. gallinae resulted in mortality below 20%. For the repellency test, significant potential was observed for the concentration of 10%.

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Section: Antioxidant Activitysupporting

confidence: 52%

Chemical composition of essential oil from Myrcia oblongata DC and potencial antimicrobial, antioxidant and acaricidal activity against Dermanyssus gallinae (Degeer, 1778)

Santana¹,

Souza²,

Coracini³

et al. 2018

Biosci. J.

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show abstract

“…The treatment of ulcers, wounds, diarrhea, lesions, diabetes mellitus, hypertension, obesity, and cholera can be achieved by different parts of guava tree (El Sohafy, Metwalli, Harraz, & Omar, 2009). Ethanolic guava leaf extract has been reported to possess the excellent antioxidant activity including metal chelating, ABTS and DPPH radical scavenging activities (Tachakittirungrod, Okonogi, & Chowwanapoonpohn, 2007;Takao, Imatomi, & Gualtieri, 2015). Furthermore, it showed antimicrobial activity.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant and antibacterial properties of guava leaf extracts as affected by solvents used for prior dechlorophyllization

2018

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The impacts of different solvents used for removing chlorophyll in guava leaf powder on antioxidant and antibacterial properties of resulting ethanolic extracts were studied. Among all solvents, acetone was the most effective in chlorophyll removal, followed by chloroform as indicated by the lowest chlorophyll a and b contents in resulting extract. However, the ethanolic extract from leaf powder dechlorophyllized using acetone (ACE) showed the lowest antioxidant activities, except for H2O2 scavenging activities (744.12 µmol TE/g), which exhibited the highest value (p < 0.05). Extract from chloroform dechlorophyllized leaf powder (CHL) had the highest antioxidant activities (240.78, 2327.42, and 2598.41 µmol TE/g for DPPH, ABTS, and FRAP assays, respectively), compared to other extracts. For antibacterial activity, ACE had the highest MIC (≥2.5 mg/mL) and MBC (≥5 mg/mL) against all tested microorganisms (p < 0.05). Chloroform was the appropriate solvent for dechlorophyllization, and the resulting extract had higher antioxidant and antibacterial properties than others. Practical applications Oxidative processes and microbial spoilage are responsible for deterioration and safety of perishable food. Phenolic compounds extracted from plant materials are gaining more attention because of their remarkable antioxidant and antibacterial properties. Plant extracts can serve as a natural additive that can replace synthetic chemical additives in foods. However, the application of ethanolic plant extract in food is limited because of their characteristic green color. Dechlorophyllization of leaf extract before extraction could be a means for eliminating this limitation. To the best of our knowledge, this is the first report on the effect of solvents used in dechlorophyllization of leaf powder on the antioxidant and antibacterial properties of their resulting extract. The provided information would serve as background knowledge for preparing the plant extracts without discoloration problem. As a consequence, wider use of leaf extracts can be achieved.

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“…It mainly originates from high blood glucose levels, where the reactive oxygen species (ROS) and the free radicals (FR) production exceeds the defense capacity of the organism and disrupt the cellular reduction-oxidation balance (Dowling and Simmons, 2009;Cansian et al, 2015;Takao et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Phytotherapy in reducing glycemic index and testicular oxidative stress resulting from induced diabetes: a review

Oliveira

Silva

2017

Braz. J. Biol.

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Oxidative stress plays a main role in the development of diabetes complications. The impairment of gonadal antioxidant potential and endocrine disturbance in diabetic males causes testicular damage and failure in sperm production. Plants have been widely used to control diabetes due their hypoglycemic and antioxidant potential, contributing towards the recovery of testicular function. Current study comprises a review of the literature on the main medicinal plants used in the recovery of testicular oxidative damage in animals with experimental diabetes. Eighteen plant species in the nineteen studies selected from the search strategy were evaluated. Plant extracts were evaluated according to their effects on blood glucose and insulin levels, antioxidant enzymes and oxidant levels, lipid peroxidation, total protein, testosterone levels, gonadosomatic index, diameter of seminiferous tubules, seminiferous epithelium height and integrity, number of germ cells at stage VII and apoptosis in the seminiferous epithelium, sperm production, motility, viability and morphology. After the analysis of the studies, it was observed that plant species, used alone or in combination, may control testicular oxidative damage triggered by diabetes. The antioxidant potential varies among species, with some plants proving to have a better performance in the recovery of reproduction parameters than others.Keywords: testis, medicinal plants, antioxidants, spermatogenesis. Fitoterapia na redução da glicemia e do estresse oxidativo testicular resultantes do diabetes experimental: uma revisãoResumo O estresse oxidativo desempenha um dos principais papéis no desenvolvimento das complicações do diabetes. Em machos diabéticos, as alterações ao potencial antioxidante gonadal e os distúrbios endócrinos resultam em danos testiculares e falhas na produção de espermatozoides. Plantas têm sido amplamente utilizadas como um método de controle do diabetes devido aos seus potenciais hipoglicemiante e antioxidante, contribuindo para a recuperação da função testicular. Assim, o objetivo deste estudo é fazer uma revisão da literatura sobre as principais plantas medicinais utilizadas na recuperação de danos oxidativos testiculares em animais induzidos ao diabetes experimental. Nos dezenove estudos selecionados a partir da estratégia de busca, dezoito espécies de plantas foram utilizadas. Os extratos das espécies vegetais foram avaliados de acordo com os seus efeitos nas concentrações de glicose e insulina, níveis das enzimas antioxidantes e dos oxidantes, peroxidação lipídica, quantidade de proteínas totais, níveis de testosterona, índice gonadossomático, diâmetro dos túbulos seminíferos, altura e integridade do epitélio seminífero, número de células germinativas no estágio VII, número de células em apoptose no epitélio seminífero, produção, motilidade, viabilidade e morfologia espermática. Depois das análises aos estudos, foi observado que as espécies vegetais, sozinhas ou em combinação, podem ajudar a controlar os danos oxidativos testiculares dese...

show abstract

Antioxidant activity and phenolic content of leaf infusions of Myrtaceae species from Cerrado (Brazilian Savanna)

Cited by 61 publications

References 26 publications

Chemical composition of essential oil from Myrcia oblongata DC and potencial antimicrobial, antioxidant and acaricidal activity against Dermanyssus gallinae (Degeer, 1778)

Chemical composition of essential oil from Myrcia oblongata DC and potencial antimicrobial, antioxidant and acaricidal activity against Dermanyssus gallinae (Degeer, 1778)

Antioxidant and antibacterial properties of guava leaf extracts as affected by solvents used for prior dechlorophyllization

Phytotherapy in reducing glycemic index and testicular oxidative stress resulting from induced diabetes: a review

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