rubiadin/rubia

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Carcinogenic potential of alizarin and rubiadin, components of madder color, in a rat medium-term multi-organ bioassay.

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Madder color (MC), a food coloring extracted from roots of Rubia tinctorum L., has been proven to exert carcinogenicity in the rat kidney and liver. Furthermore, it induces DNA adducts in the kidney, liver, and colon. MC is in fact composed of anthraquinones such as lucidin-3-O-primeveroside and

Comparison of the antioxidant action of the alcoholic extract of Rubia cordifolia with rubiadin.

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The inhibition of FeSO4 induced lipid peroxidation in rat liver by alcoholic extract of Rubia cordifolia and by one of its constituent rubiadin (1, 3-dihydroxy-2-methyl anthraquinone) (pure form) has been compared. Both have been found to inhibit lipid peroxidation in a dose dependent manner.

Hepatoprotective effects of rubiadin, a major constituent of Rubia cordifolia Linn.

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The hepatoprotective effects of rubiadin, a major constituent isolated from Rubia cordifolia Linn., were evaluated against carbon tetrachloride (CCl4)-induced hepatic damage in rats. Rubiadin at a dose of 50, 100 and 200 mg/kg was administered orally once daily for 14 days. The substantially

Rubiadin, a new antioxidant from Rubia cordifolia.

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Rubiadin, a dihydroxy anthraquinone, isolated from alcoholic extract of Rubia cordifolia, possesses potent antioxidant property. It prevents lipid peroxidation induced by FeSO4 and t-butylhydroperoxide (t-BHP) in a dose dependent manner. The per cent inhibition was more in the case of Fe2+ induced

Chemical structure determination of DNA bases modified by active metabolites of lucidin-3-O-primeveroside.

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Lucidin-3-O- primeveroside (LuP) is one of the components of madder root (Rubia tinctorum L.; MR) which is reported to be carcinogenic in the kidney and liver of rats. Since metabolism of LuP generates genotoxic compounds such as lucidin (Luc) and rubiadin (Rub), it is likely that LuP plays a key

Targeted tumor therapy by Rubia tinctorum L.: analytical characterization of hydroxyanthraquinones and investigation of their selective cytotoxic, adhesion and migration modulator effects on melanoma cell lines (A2058 and HT168-M1).

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BACKGROUND Alizarin and purpurin are di- and trihydroxyanthraquinones derived from Rubia tinctorum L. Previous pharmacological studies have demonstrated that they exhibit certain degree of selective inhibitory effects towards cancer cells suggesting their application as a targeted drug for cancer.

[New quinones in Rubia cordifolia L. Roots, III].

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From roots of Rubia cordifolia L. four anthraquinones are isolated: 1-hydroxy 2-methoxy anthraquinone; 1,4-dihydroxy 2-methyl 5-methoxy anthraquinone or 1,4-dihydroxy 2-methyl 8-methoxy anthraquinone; 1,3-dimethoxy 2-carboxy anthraquinone and rubiadin.

The mutagenic constituents of Rubia tinctorum.

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Twenty compounds were isolated from the roots of Rubia tinctorum which are used as a commercial source of madder color. Among these compounds, mollugin (1), 1-hydroxy-2-methylanthraquinone (2), 2-ethoxymethylanthraquinone(11), rubiadin (13), 1,3-dihydroxyanthraqunone (14),

Formation of genotoxic metabolites from anthraquinone glycosides, present in Rubia tinctorum L.

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Rubia tinctorum L., a medicinal plant used for the treatment of kidney and bladder stones, contains a characteristic spectrum of 9,10-anthraquinone derivatives, which are substituted in only one of the aromatic benzo rings. The majority of the anthraquinones present in the plant itself or in plant

Evaluation of analgesic and anti-inflammatory activities of Rubia cordifolia L. by spectrum-effect relationships.

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The objective of the current work was to evaluate the spectrum-effect relationships between high-performance liquid chromatography fingerprints and analgesic and anti-inflammatory effects of Rubia cordifolia L. extract (RCE), and to identify active components of RCE. Chemical fingerprints of ten

Anthraquinone distribution in the hypogeal apparatus of Rubia peregrina L. growing wild in Sardinia.

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The isolation, characterisation and quantification of anthraquinones, from hypogeal apparatus of Rubia peregrina L. (Wild Madder) growing wild in Sardinia (Italy) are described. The present study allowed us to perform an easy and fast HPLC analytical method for the detection of anthraquinones in all

A multivariate study of the performance of an ultrasound-assisted madder dyes extraction and characterization by liquid chromatography-photodiode array detection.

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An extraction method of madder (Rubia tinctorum) roots dyes is established and optimized to obtain the original chemical composition. A central composite design (CCD) was developed to specify the importance of the three major factors studied (time, temperature and solvent composition) affecting the

Investigation of the colourants used in icons of the Cretan School of iconography.

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The red shades of 13 icons (15th-17th century) of the Cretan School of iconography are investigated in detail to identify the inorganic and organic colouring materials comprising the paint layers. Examination of sample cross-sections is performed with optical microscopy. Micro-Raman spectroscopy and

Comparison of extraction methods for the analysis of natural dyes in historical textiles by high-performance liquid chromatography.

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Different methods for the extraction of Dactylopius coccus Costa, Rubia tinctorum L., Isatis tinctoria L., Reseda luteola L., Curcuma longa L. and Cotinus coggygria Scop. from wool fibres are investigated using high-performance liquid chromatography with diode array detector (HPLC-DAD). The

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