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9 resultados
Properties of Ca2+-activated protease specific for the intermediate-sized filament protein vimentin in Ehrlich-ascites-tumour cells.
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A Ca2+-activated neutral protease is described which, when tested against various native proteins, appears to be specific for vimentin, the 58,000-Mr subunit protein of intermediate-sized (7--11 nm) filaments in Ehrlich-ascites-tumour cells. The protein subunits of other classes of
Anti-tumor promoting potential of naturally occurring diarylheptanoids structurally related to curcumin.
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In recent years, there have been considerable efforts to search for naturally occurring substances for intervention of carcinogenesis. Many components from medicinal or dietary plants have been identified to possess potential chemopreventive properties. For instance, curcumin, a yellow colouring
An analysis on the suppression of NO and PGE2 by diphenylheptane A and its effect on glycerophospholipids of lipopolysaccharide-induced RAW264.7 cells with UPLC/ESI-QTOF-MS.
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Diarylheptanoid A, 5-hydroxy-7-(4'-hydroxy-3'-methoxyphenyl)-1-phenyl-3-heptanone, is a naturally occurring phytochemical ingredient isolated from the rhizome of Alpinia officinarum. In order to confirm the anti-inflammatory activity of diphenylheptane A, we investigated its effects on
Effects of yakuchinone A and yakuchinone B on the phorbol ester-induced expression of COX-2 and iNOS and activation of NF-kappaB in mouse skin.
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Certain medicinal plants contain anti-inflammatory and antioxidative substances that can exert chemopreventive effects. Our previous studies have demonstrated that the methanol extract of Alpinia oxyphylla Miquel (Zingiberaceae) inhibits tumor promotion in mouse skin. Two major diarylheptanoids
In vitro and ex vivo antitubercular activity of diarylheptanoids from the rhizomes of Alpinia officinarum Hance.
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Phytochemical investigation of methanol extract of the rhizomes of Alpinia officinarum Hance afforded four known diarylheptanoids 1,7-diphenylhept-4-en-3-one (1), 5-hydroxy-1,7-diphenyl-3-heptanone (2), 5-hydroxy-7-(4″-hydroxy-3″-methoxyphenyl)-1-phenyl-3-heptanone (3), and
Molecular mechanisms of chemopreventive effects of selected dietary and medicinal phenolic substances.
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Recently, considerable attention has been focused on identifying naturally occurring chemopreventive substances capable of inhibiting, retarding, or reversing the multi-stage carcinogenesis. A wide array of phenolic substances, particularly those present in dietary and medicinal plants, have been
Antioxidative activity of diarylheptanoids from the bark of black alder (Alnus glutinosa) and their interaction with anticancer drugs.
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Diarylheptanoids belong to polyphenols, a group of plant secondary metabolites with multiple biological properties. Many of them display antioxidative, cytotoxic, or anticancer actions and are increasingly recognized as potential therapeutic agents. The aim of this study was to evaluate antioxidant
Isolates of Alpinia officinarum Hance as COX-2 inhibitors: Evidence from anti-inflammatory, antioxidant and molecular docking studies.
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BACKGROUND
Inflammation triggered by oxidative stress can cause various ailments, such as cancer, rheumatoid arthritis, asthma, diabetes etc. In the last few years, there has been a renewed interest in studying the antioxidant and anti-inflammatory action of plant constituents such as flavonoids and
Diarylheptanoids from the rhizomes of Alpinia officinarum and their anticancer activity.
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Two new diarylheptanoids (1, 2), together with two known analogs (3, 4), were isolated from the rhizomes of Alpinia officinarum. The new compounds were elucidated to be (5S)-5-hydroxy-7-(3, 4-dihydroxyphenyl)-1-phenyl-3-heptanone (1) and (5R)-5-hydroxy-7-(3-methoxy-4,
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