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1.
Braz. J. Pharm. Sci. (Online) ; 58: e21154, 2022. tab, graf
Article in English | LILACS | ID: biblio-1420438

ABSTRACT

Abstract Because it promotes the lightening of pigment spots, tyrosinase inhibition is one of the mechanisms of depigmenting cosmetic products. Considering the adverse effects produced by synthetic depigmenting actives, the search for new therapeutic options is desirable, and plant extracts are possible candidates for hyperpigmentation treatment. Glycolic extracts of Cecropia pachystachya Trécul are, therefore, the focus of this study. Its chemical characterization, antioxidant activity, tyrosinase inhibition, and cell viability were evaluated. Glycolic extracts were obtained by macerating the leaves of C. pachystachya in grain alcohol and glycerin or propylene glycol. Both had a similar chemical constitution, the glycerin being more efficient in concentrating phenolic compounds and flavonoids. Analyses by UHPLC-MS detected quinic acid, chlorogenic acid isomers, proanthocyanidin dimers type B and C, catechin/epicatechin, orientin/isoorientin, isoorientin 2"-O-xyloside, vitexin/isovitexin, and rutin. 5-O-caffeoylquinic acid was then quantified was then quantified, with predominance in the extract produced with propylene glycol. These extracts showed a high antioxidant capacity by the method of DPPH, ß-carotene, and nitric oxide. As for depigmenting activity, both extracts were able to inhibit tyrosinase. Cell viability assay also revealed that the extracts could safely be used in concentrations of ≤ 125 µg/mL. Thus, this study demonstrated for the first time that the glycolic extracts of C. pachystachya have promising chemical and biological characteristics for the development of a multifunctional cosmetic with antioxidant and tyrosinase-inhibition activities


Subject(s)
Cosmetics/classification , Cecropia Plant/adverse effects , Bleaching Agents/classification , Skin Cream/analysis , Plant Extracts/adverse effects , Antioxidants/pharmacology
2.
An. acad. bras. ciênc ; 89(3,supl): 2053-2073, 2017. tab, graf
Article in English | LILACS | ID: biblio-886784

ABSTRACT

ABSTRACT This study aimed to further investigate the cytotoxicity against tumor cell lines and several bacterial strains of Annona squamosa and its mode of action. Methanol extracts of A. squamosa leaves (ASL) and seeds (ASS) were used. ASL showed significant antibacterial activity against S. aureus, K. pneumoniae and E. faecalis with MIC values of 78, 78 and 39 µg/mL respectively. Moreover, ASL exhibited significant biofilm disruption, rapid time dependent kinetics of bacterial killing, increased membrane permeability and significantly reduced the cell numbers and viability. Regarding the cytotoxicity against tumor cell lines, ASS was more active against Jurkat and MCF-7 cells, with CI50 1.1 and 2.1 µg/mL, respectively. ASL showed promising activity against Jurkat and HL60, with CI50 4.2 and 6.4 µg/mL, respectively. Both extracts showed lower activity against VERO cells and reduced the clonogenic survival at higher concentrations (IC90) to MCF-7 and HCT-116 lineages. The alkaloids anonaine, asimilobine, corypalmine, liriodenine nornuciferine and reticuline were identified in extracts by UPLC-ESI-MS/MS analysis. This study reinforced that A. squamosa presents a remarkable phytomedicinal potential and revealed that its antimicrobial mechanism of action is related to bacterial membrane destabilization.


Subject(s)
Humans , Animals , Staphylococcus aureus/drug effects , Plant Extracts/pharmacology , Enterococcus faecalis/drug effects , Annona/chemistry , Klebsiella pneumoniae/drug effects , Anti-Bacterial Agents/pharmacology , Microbial Sensitivity Tests , Cell Membrane/drug effects , Chlorocebus aethiops , Cell Line, Tumor/drug effects
3.
Rev. bras. farmacogn ; 23(3): 488-496, May-June 2013. ilus, graf, tab
Article in English | LILACS | ID: lil-676282

ABSTRACT

The anti-inflammatory and apoptotic activity of the essential oil of Syzygium cumini (L.) Skeels, Myrtaceae, leaves was investigated in vivo. The anti-inflammatory action and chronic granulomatous inflammation in BALB/c mice, intravenously infected with Mycobacterium bovis, BCG, (Bacillo Calmet Guerim), was judged by measuring and classifying the granulomas formed in the hepatic parenchyma. The degree of apoptosis in the inflammatory cells was also measured. A reduction in the granulomatous area and a change in the pattern of the granulomas were found. Anti-mycobacterial activity of the essential oil against M. bovis was detected in vitro by an interferometric method in liquid culture medium. The chemical constituents of the essential oil were determined by GC/MS. Higher yields of the essential oil of S. cumini leaves were obtained by extraction in a Clevenger apparatus when the fresh leaves were previously frozen as a pre-processing step. The essential oil obtained from this plant demonstrated a statistically significant and dramatic effect in the chosen model system.

4.
HU rev ; 38(3/4): 203-206, abr.-jun. 2012.
Article in Portuguese | LILACS | ID: biblio-1993

ABSTRACT

Dentre as muitas morbidades que acometem as crianças, os acidentes domésticos representam uma importante causa de morbimortalidade e de invalidez, constituindo-se assim em um grave problema de saúde pública. Portanto, além da identificação dos fatores envolvidos na ocorrência\ dos acidentes e do encaminhamento de suas consequências, faz-se necessário criar estratégias para sua prevenção. Neste contexto, este artigo relata uma experiência vivenciada por acadêmicos do curso de Enfermagem da Universidade Federal de Juiz de Fora, participantes do projeto "Brincando e Aprendendo Saúde", no qual utilizou-se o lúdico para abordagem do tema "prevenção de acidentes na infância". Tendo como público-alvo crianças de quatro a seis anos assistidas por uma Escola Municipal situada no município de Juiz de Fora ­ MG, o tema foi abordado ao longo de três oficinas nas quais estabeleceu-se um processo de ensino e aprendizagem por meio da utilização do lúdico. Foram utilizadas metodologias dinâmicas, participativas e com uma linguagem acessível, sempre valorizando o conhecimento prévio dos participantes e o seu contexto social, o que gerou grande interesse das crianças em aprender e dividir experiências.


Subject(s)
Child , Pediatric Nursing , Health Education , Accidents , Accidents, Home , Education, Nursing , Accident Prevention
5.
HU rev ; 38(1/2): 61-65, jan.-mar. 2012.
Article in Portuguese | LILACS | ID: biblio-2013

ABSTRACT

A espécie Chamomilla recutita L., conhecida popularmente por camomila, camomila-dos-alemães ou matricária, é uma planta herbácea anual, aromática, pertencente à família Asteraceae. Neste trabalho, o extrato metanólico de camomila teve sua atividade antioxidante determinada pelo método do sequestro do radical 2,2'-difenil-1-picrilhidrazilo (DPPH·), apresentando CI50 de 13,7 ± 1,0µg/mL. A atividade antimicrobiana foi avaliada pelo teste de microdiluição em caldo para determinação da concentração inibitória mínima (CIM) contra sete cepas de microorganismos. Os microorganismos mais sensíveis ao extrato foram Bacillus cereus (CIM = 0,625 mg/mL), Pseudomonas aeruginosa (CIM = 1,25mg/mL) e Cryptococcus neoformans (CIM = 0,156mg/mL). A concentração bactericida mínima (CBM) foi de 0,625mg/mL para B. cereuse de 5,0mg/mL para P. aeruginosa. Este trabalho relata, pela primeira vez, a atividade anticriptocócica do extrato metanólico de camomila e mostra que, apesar de extensivamente estudada, ainda existem novas propriedades biológicas que podem ser identificadas para a camomila.


Subject(s)
Chamomile , Antioxidants , Plants , Plants, Medicinal , Asteraceae , Matricaria , Anti-Infective Agents , Anti-Bacterial Agents
6.
HU rev ; 37(3): 347-352, set. 2011.
Article in Portuguese | LILACS | ID: lil-648180

ABSTRACT

Este estudo teve como objetivos avaliar o potencial antioxidante e verificar o perfil fitoquímico do extrato bruto metanólico e das partições hexânica, diclorometânica, em acetato de etila e hidrometanólica das folhas de Lacistema pubescens. A atividade antioxidante foi avaliada pelos métodos do DPPH e TBA. Pelo método do DPPH, todas as amostras foram efetivas em sequestrar o radical livre e, pelo ensaio com TBA, todas as amostras, com exceção da partição hexânica, inibiram significativamente a peroxidação lipídica. A partição hidrometanólica foi a que apresentou a melhor atividade antioxidante e também o maior conteúdo de substâncias fenólicas. Estas, portanto, parecem ser as responsáveis pela atividade encontrada.


Subject(s)
Lipid Peroxidation , Antioxidants , Phenols , Plants, Medicinal , Flavonoids
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