meso dihydroguaiaretic acid/machilus

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meso-dihydroguaiaretic acid from Machilus thunbergii down-regulates TGF-beta1 gene expression in activated hepatic stellate cells via inhibition of AP-1 activity.

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meso-dihydroguaiaretic acid (DGA), naturally occurring in plants such as Machilus thunbergii and Myristica fragrans, exhibits a neuroprotective effect and also exerts cytotoxicity to certain cancer cells. Activated hepatic stellate cells (HSCs) play an important role in liver fibrogenesis through

Effect of meso-dihydroguaiaretic acid from Machilus thunbergii Sieb et Zucc on MMP-1 expression in heat shock-induced cultured primary human fibroblasts.

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Ethanol and aqueous extracts of Machilus thunbergii Sieb et Zucc (Lauraceae) used traditionally for the treatment of a variety of diseases were screened in vitro for MMP-1 inhibitory actions. Meso-dihydroguaiaretic acid (MDGA) from the stem bark of M. thunbergii showed a significant inhibition of

Suppression of the SOS-Inducing Activity of Trp-P-1 and Aflatoxin B1 by Meso-dihydroguaiaretic Acid from Machilus thunbergii in the Salmonella typhimurium TA1535/pSK1002 umu Test.

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The methanol extract from Machilus thunbergii showed a suppressive effect on umu gene expression of the SOS response in Salmonella typhimurium TA1535/pSK1002 against the mutagen, 3-amino-1,4-dimethyl-5H-pyrido[4,3-b]indole (Trp-P-1), which requires liver metabolizing enzymes. The methanol extract

Suppression of the SOS-inducing activity of Trp-P-1 and aflatoxin B1 by meso-dihydroguaiaretic acid from Machilus thunbergii in the Salmonella typhimurium TA1535/pSK1002 umu test.

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Meso-dihydroguaiaretic acid from Machilus thunbergii SIEB et ZUCC., and its effects on the expression of matrix metalloproteinase-2, 9 cause by ultraviolet irradiated cultured human keratinocyte cells (HaCaT).

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Ethanol and aqueous extracts of Machilus thunbergii used traditionally for the treatments a wide variety of diseases were screened in vitro for the matrix metalloproteinase (MMP)-9 inhibitor actions. Meso-dihydroguaiaretic acid from the stems bark of Machilus thunbergii showed significant MMP-9

Metabolic characterization of meso-dihydroguaiaretic acid in liver microsomes and in mice.

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meso-Dihydroguaiaretic acid (MDGA) is a major component of Myristica fragrans and Machilus thunbergii that is traditionally used as a spice and for medicinal purposes. Despite reports of various biological activities exerted by MDGA, there is no information regarding its metabolic properties. The

Meso-dihydroguaiaretic acid and licarin A of Machilus thunbergii protect against glutamate-induced toxicity in primary cultures of a rat cortical cells.

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1 We previously reported that four lignans isolated from the bark of Machilus thunbergii Sieb. et Zucc. (Lauraceae) protected primary cultures of rat cortical neurons from neurotoxicity induced by glutamate. 2 Among the lignans, meso-dihydroguaiarectic acid (MDGA) and licarin A significantly

Retracted: Effect of meso-dihydroguaiaretic acid from Machilus thunbergii Sieb et Zucc on MMP-1 expression in heat shock-induced cultured primary human fibroblasts. (Phytother Res 2006; 20(8): 714-716).

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Neuroprotective lignans from the bark of Machilus thunbergii.

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The CH (2)Cl (2) fraction of the bark of Machilus thunbergii Sieb. et Zucc. (Lauraceae) significantly protected primary cultures of rat cortical cells exposed to the excitotoxic amino acid, L-glutamate. (-)-Isoguaiacin, meso-dihydroguaiaretic acid, machilin A, (+)-galbelgin, licarin A, (-)-sesamin,

Stimulatory activity of lignans from Machilus thunbergii on osteoblast differentiation.

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Phytoestrogens are naturally occurring compounds exerting estrogenic activity, and include isoflavonoids, flavonoids and lignans. In the present study, we evaluated the stimulating activity of six lignans, meso-dihydroguaiaretic acid, nordihydroguaiaretic acid, machilin A, guaiacin, isoguaiacin and

Increase of caspase-3 activity by lignans from Machilus thunbergii in HL-60 cells.

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Nine lignans and two butanolides were isolated from the stem bark of Machilus thunbergii and their structures were identified as machilin A (1), licarin B (2), zuonin B (3), macelignan (4), secoisolancifolide (5), isolancifolide (6), oleiferin C (7), meso-dihydroguaiaretic acid (8), licarin A (9),

Antioxidant lignans from Machilus thunbergii protect CCl4-injured primary cultures of rat hepatocytes.

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Eleven lignans (1-11) were isolated from the CH2Cl2 fraction of the bark of Machilus thunbergii Sieb. et Zucc. (Lauraceae). These were identified as (-)-acuminatin (1), (-)-isoguaiacin (2), meso-dihydroguaiaretic acid (3), (+)-galbacin (4), (-)-sesamin (5), (+)-galbelgin (6), machilin A (7),

Lignans from the bark of Machilus thunbergii and their DNA topoisomerases I and II inhibition and cytotoxicity.

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Activity-guided fractionation based on topoisomerase I inhibitory activity lead to the isolation of ten lignans (1-10) from the methylene chloride extract of the bark of Machilus thunbergii SIEB. et ZUCC. (Lauraceae). These were identified as machilin A (1), erythro-austrobailignan-6 (2),

Chemical constituents of the bark of Machilus wangchiana and their biological activities.

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Eleven new metabolites, butanolides 1-6, lignan derivatives 7-9, sesquiterpene 10, and 3',4'-seco-flavane derivative 11, have been isolated from an ethanol extract of Machilus wangchiana. Twenty known compounds, including ginkgolides A and B (16 and 17), were also isolated. Their structures and

[Lignans from Machilus robusta].

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Eighteen lignans were isolated from an ethanol extract of Machilus robusta by a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20 and reversed-phase HPLC. Their structures were identified by spectroscopic data analysis as

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