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Alkaloids extracted from Pterogyne nitens induce apoptosis in malignant breast cell line
(Tumor Biology, 2010-10-01) [Artigo]
In the present study, two alkaloids isolated from Pterogyne nitens, a plant native to Brazil, have been shown to induce apoptosis in human breast cancer cells. These compounds, pterogynine (PGN) and pterogynidine (PGD), ...
Caffeic Acid Phenethyl Ester: Consequences of Its Hydrophobicity in the Oxidative Functions and Cytokine Release by Leukocytes
(Evidence-based Complementary And Alternative Medicine, 2014-01-01) [Artigo]
Numerous anti-inflammatory properties have been attributed to caffeic acid phenethyl ester (CAPE), an active component of propolis. NADPH oxidases are multienzymatic complexes involved in many inflammatory diseases. Here, ...
The reactivity of oytho-methoxy-substituted catechol radicals with sulfhydryl groups: Contribution for the comprehension of the mechanism of inhibition of NADPH oxidase by apocynin
(Biochemical Pharmacology, 2007-08-01) [Artigo]
Redox processes are involved in the mechanism of action of NADPH oxidase inhibitors such as diphenyleneiodonium and apocynin. Here, we studied the structure-activity relationship for apocynin and analogous ortho-methoxy- ...
Oxidation of acetylacetone catalyzed by horseradish peroxidase in the absence of hydrogen peroxide
(Biochimica et Biophysica Acta: General Subjects, 2006-12-01) [Artigo]
Horseradish peroxidase (HRP) is a plant enzyme widely used in biotechnology, including antibody-directed enzyme prodrug therapy (ADEPT). Here, we showed that HRP is able to catalyze the autoxidation of acetylacetone in the ...
Light emission from tryptophan oxidation by hypobromous acid
(Luminescence, 2012-10-08) [Artigo]
The emission of ultraweak light from cells is a phenomenon associated with the oxidation of biomolecules by reactive oxygen species. The indole moiety present in tryptophan, serotonin and melatonin is frequently associated ...
The triad indole-3-acetic acid ethyl ester/esterase/horseradish peroxidase as a new cytotoxic prodrug/enzyme combination
(Applied Cancer Research, 2010) [Artigo]
The antibody-directed enzyme prodrug therapy (ADEPT) is a means of restricting the action of toxic drugs to the tumor site. The enzyme/prodrug pair horseradish peroxidase (HRP)/indole-3-acetic acid (IAA) has been studied ...
Investigation of Human Albumin-Induced Circular Dichroism in Dansylglycine
(PLOS ONE, 2013-10-16) [Artigo]
Induced circular dichroism (ICD), or induced chirality, is a phenomenon caused by the fixation of an achiral substance inside a chiral microenvironment, such as the hydrophobic cavities in proteins. Dansylglycine belongs ...
The effect of pyrazinamide and rifampicin on isoniazid metabolism in rats
(Biopharmaceutics & Drug Disposition, 2007-09-01) [Artigo]
Hepatotoxicity is the main concern during tuberculosis chemotherapy with the first-line drugs isoniazid (INH), rifampicin (RMP) and pyrazinamide (PYR). Since these hepatotoxic events have been associated with INH metabolites, ...
The effect of rifampicin and pyrazinamide on isoniazid pharmacokinetics in rats
(Biopharmaceutics & Drug Disposition, 2007-11-01) [Artigo]
Tuberculosis chemotherapy involves combination of the drugs isoniazid (INH), rifampicin (RMP) and pyrazinamide (PYR) for a 6-month period. The present work investigated the influence of RMP and PYR on the pharmacokinetic ...
Serum myeloperoxidase level is Increased in heavy smokers
(Open Journal of Clinical Diagnostics, 2013) [Artigo]
Raised myeloperoxidase (MPO) serum levels are associated with endothelial dysfunction and cigarette smoking is a risk factor for cardiovascular diseases. Since myocardial infarction is associated with leukocytosis and ...