Results: 39

Poly(methylene blue)-modified electrode for indirect electrochemical sensing of OH radicals and radical scavengers

An. acad. bras. ciênc; 89 (3), 2017
ABSTRACT A new modified electrode for indirect sensing of OH· and radical scavengers was described. The electrochemical polymerization of methylene blue in aqueous solutions and the properties of the resulting films on a glassy carbon electrode were carried out using cyclic voltammetry. A surface covera...

In vitro and cellular activities of the selected fruits residues for skin aging treatment

An. acad. bras. ciênc; 89 (1,supl), 2017
ABSTRACT Peel extracts of litchi and rambutan, and that of tamarind seed coat were investigated in relation to their utility in skin-aging treatments. Standardized extracts of tamarind were significantly (p < 0.05) more efficient at O2 •- scavenging (IC50 = 27.44 ± 0.09) than those of litchi an...

Antioxidant effect of quinoline derivatives containing or not selenium: Relationship with antinociceptive action quinolines are antioxidant and antinociceptive

An. acad. bras. ciênc; 89 (1,supl), 2017
ABSTRACT The present study investigated the antioxidant effect of a new class of quinoline derivatives (a-d) on assays in vitro. Lipid peroxidation, thiol peroxidase-like and free radical scavenging activities were determined to evaluate antioxidant activity of compounds. Thiol oxidase-like and δ-am...

N-acetyl-cysteine inhibits liver oxidative stress markers in BALB/c mice infected with Leishmania amazonensis

Mem. Inst. Oswaldo Cruz; 112 (2), 2017
BACKGROUND Leishmaniasis is a parasitosis caused by several species of the genus Leishmania. These parasites present high resistance against oxidative stress generated by inflammatory cells. OBJECTIVES To investigate oxidative stress and molecular inflammatory markers in BALB/c mice infected with L. a...

Protective effects of deferasirox and N-acetyl-L-cysteine on iron overload-injured bone marrow

Braz. j. med. biol. res; 50 (12), 2017
Using an iron overload mouse model, we explored the protective effect of deferasirox (DFX) and N-acetyl-L-cysteine (NAC) on injured bone marrow hematopoietic stem/progenitor cells (HSPC) induced by iron overload. Mice were intraperitoneally injected with 25 mg iron dextran every 3 days for 4 weeks to est...

In vitro antioxidant activity and qualitative phytochemical analysis of two Vismia (Hypericaceae) species collected in Los Andes, Venezuela

Rev. biol. trop; 64 (4), 2016
Abstract:Vismia genus is distributed mainly in tropical and subtropical regions of Central, South America and some areas of Africa. According to previous investigations, antioxidant potential of Vismia species might be related to anthrones, anthraquinones, flavonoids and phenol derivatives biosynthesized...

The effects of supplemental melatonin administration on the healing of bone defects in streptozotocin-induced diabetic rats

J. appl. oral sci; 24 (3), 2016
ABSTRACT Diabetes mellitus (DM) causes an increased production of free radicals that can impair bone healing. Melatonin is a hormone secreted mainly by the pineal gland, which participates in the neutralization process of free radicals. Objective The aim of this study was to investigate histologic and ...

Uso de N-acetilcisteína tópica en ictiosis: experiencia clínica en una serie de casos
Use of topical N-acetylcysteine ​​in ichthyosis: clinic experience in a series of cases

Rev. chil. dermatol; 32 (1), 2016
Las ictiosis son trastornos generalizados de la queratinización, que se caracterizan por presentar hiperqueratosis y/o descamación. El tratamiento es sintomático e incluye terapias tópicas y sistémicas. La N-Acetilcisteína (NAC) tópica ha mostrado utilidad en algunos reportes. Se describirá la ex...

Extraction optimization of total triterpenoids from Jatropha curcas leaves using response surface methodology and evaluations of their antimicrobial and antioxidant capacities

Electron. j. biotechnol; 18 (2), 2015
Background Triterpenoids are multifunctional secondary metabolites in plants. But little information is available concerning the actual yield, optimal extraction method and pharmacologic activity with regard to triterpenoids from Jatropha curcas leaves (TJL). Hence, response surface methodology (RSM) was...

In vitro antioxidant properties, free radicals scavenging activities of extracts and polyphenol composition of a non-timber forest product used as spice: Monodora myristica

Biol. Res; 48 (), 2015
BACKGROUND: Excessive production of free radicals causes direct damage to biological molecules such as DNA, proteins, lipids, carbohydrates leading to tumor development and progression. Natural antioxidant molecules from phytochemicals of plant origin may directly inhibit either their production or limit...