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PubMed2002

Inhibitory activity of diacylglycerol acyltransferase by tanshinones from the root of Salvia miltiorrhiza.

The inhibitory activity of tanshinones from Salvia miltiorrhiza was tested on rat liver diacylglycerol acyltransferase (DGAT). Cryptotanshinone (1) and 15,16-dihydrotanshinone I (3) exhibited potent DGAT inhibitory activities dose-dependently with IC50 values of 10.5 microg/ml and 11.1 microg/ml. However, tanshinone IIA (2) and tanshinone I (4) showed very weak inhibition (IC50 value: > 250 microg/ml). A dihydrofuran moiety was seemed to be responsible for the stronger inhibitory activity.

Abietanes↗
PubMed2003

Further isolation of antioxidative (+)-1-hydroxypinoresinol-1-O-beta-D-glucoside from the rhizome of Salvia miltiorrhiza that acts on peroxynitrite, total ROS and 1,1-diphenyl-2-picrylhydrazyl radical.

A furanofuranoid lignan glycoside, with radical scavenging on peroxynitrite, total reactive oxygen species (ROS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, was isolated from the rhizome of Salvia miltiorrhiza and characterized as (+)-1-hydroxypinoresinol-1-O-beta-D-glucoside based on spectroscopic evidence. The compound exhibited peroxynitrite, total ROS and DPPH radical scavenging activities with IC50 values of 3.23 +/- 0.04, 2.26 +/- 0.07 and 32.3 +/- 0.13 microM, respectively. Penicillamine, Trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid) and L-ascorbic acid, acting as positive controls, showed radical scavenging activities with IC50 values of 6.72 +/- 0.25, 1.43 +/- 0.04 and 11.4 +/- 0.07 microM, respectively.

Antioxidants↗
PubMed2005

Induction and potentiation of diterpenoid tanshinone accumulation in Salvia miltiorrhiza hairy roots by beta-aminobutyric acid.

The non-protein amino acid beta-aminobutyric acid (BABA) is a proven inducer of plant defense against pathogens. This work examines its effect on the production of diterpenoid tanshinones in Salvia miltiorrhiza hairy root cultures, both separately and in combination with a yeast elicitor (YE, the carbohydrate fraction of yeast extract). In the absence of YE, BABA at 0.1, 1 and 2 mM caused a dose-dependent enhancement of tanshinone accumulation, with up to a 4.5-fold increase (from 0.24 to 1.09 mg/g DW) in total content of three major tanshinones (cryptotanshinone, tanshinone I and tanshinone IIA) in the hairy roots. The combination of BABA with YE treatment further enhanced tanshinone production, but only when the BABA treatment was applied to the culture a few days before the YE treatment. Compared with methyl jasmonate, BABA was more effective in enhancing tanshinone production. A 3-day pretreatment with 1 mM BABA followed by YE-treatment, increased the total tanshinone content of roots by 9.4 times to 2.26 mg/g cells, and the volumetric tanshinone yield of culture by 6.3 times (from 3.2 to 20.1 mg/l). The results suggest that BABA can strongly potentiate elicitor-induced secondary metabolism in plant tissue cultures.

Abietanes↗
PubMed2005

Allelopathic effects of volatile monoterpenoids produced by Salvia leucophylla: Inhibition of cell proliferation and DNA synthesis in the root apical meristem of Brassica campestris seedlings.

Salvia leucophylla, a shrub observed in coastal south California, produces several volatile monoterpenoids (camphor, 1,8-cineole, beta-pinene, alpha-pinene, and camphene) that potentially act as allelochemicals. The effects of these were examined using Brassica campestris as the test plant. Camphor, 1,8-cineole, and beta-pinene inhibited germination of B. campestris seeds at high concentrations, whereas alpha-pinene and camphene did not. Root growth was inhibited by all five monoterpenoids in a dose-dependent manner, but hypocotyl growth was largely unaffected. The monoterpenoids did not alter the sizes of matured cells in either hypocotyls or roots, indicating that cell expansion is relatively insensitive to these compounds. They did not decrease the mitotic index in the shoot apical region, but specifically lowered mitotic index in the root apical meristem. Moreover, morphological and biochemical analyses on the incorporation of 5-bromo-2'-deoxyuridine into DNA demonstrated that the monoterpenoids inhibit both cell-nuclear and organelle DNA synthesis in the root apical meristem. These results suggest that the monoterpenoids produced by S. leucophylla could interfere with the growth of other plants in its vicinity through inhibition of cell proliferation in the root apical meristem.

Brassica↗
PubMed2006

Salviae Miltiorrhizae BGE Radix increases rat striatal K(+)-stimulated dopamine release and activates the dopamine release with protection against hydrogen peroxide-induced injury in rat pheochromocytoma PC12 cells.

The present study investigated the effect of the medicinal plant Salviae miltiorrhizae radix (SMR) on dopaminergic neurotransmission in comparison with amphetamine. The effect of SM (0.1 g/ml) on K(+) (20 mM)-stimulated dopamine (DA) release from rat striatal slices was compared with amphetamine (10(-4) M). Amphetamine and SMR significantly increased K(+)-stimulated DA release (P<0.001) from rat striatal slices when compared with K(+)-stimulated alone. On the other hand, to examine whether in vitro SMR treatment induces DA release in PC12 cells, the role of protein kinases has been investigated in the induction of the SMR-mediated events by using inhibitors of protein kinase C (PKC), mitogen activated protein kinase (MAP kinase) or protein kinase A (PKA). PKC inhibitors chelerythrine (50 and 100 nM), Ro31-8220 (100 nM) and the MAP kinase inhibitor, PD98059 (20 microM) inhibited the ability of SMR to elicit the SMR-stimulated DA release. The direct-acting PKC activator, 12-O-tetradecanoyl phorbol 13-acetate (TPA, 100 nM) mimicked the ability of SMR to elicit DA release. On the contrary, a selective PKA inhibitor, 50 microM Rp-8-Br-cAMP, blocked the development of SMR-stimulated DA release. The results demonstrated that SMR may stimulate DA release and that SMR-induced increases in MAP kinase and PKC are important for induction of the enhancement in transporter-mediated DA release and PKA was also required for the enhancement in SMR-stimulated DA release. SMR treatment (0.1-10 microg/ml) to the hydrogen peroxide (H(2)O(2))-treated PC12 cells activated the enzyme activities such as catalase, superoxide dismutase and glutathione peroxidase, and decreased the malondialdehyde level, indicating that SMR has also protective effects against free radical-induced cell toxicity. Therefore, the mechanism by which SMR induces the enhancement in SMR-stimulated DA release is apparent. It remains to be determined whether the effect of SMR on DA function is important in its therapeutic use in the treatment of drug addiction.

Amphetamines↗
PubMed2005

Antifibrotic effects of Salvia miltiorrhiza on dimethylnitrosamine-intoxicated rats.

Excessive oxidative stress is implicated in hepatic fibrogenesis. Extracts of Salvia miltiorrhiza (Sm) have been shown to protect cells against oxidative stress. In this study we investigated the in vitro and in vivo effects of Sm on hepatic fibrosis. A cell line of rat hepatic stellate cells (HSC-T6) was stimulated with transforming growth factor-beta1 (TGF-beta1). The inhibitory effects of Sm (50-400 microg/ml) on TGF-beta1-induced alpha-smooth muscle actin (alpha-SMA) secretion and the mRNA expressions of fibrosis-related genes, including alpha-SMA, connective tissue growth factor (CTGF), and tissue inhibitor of metalloproteinase-1 (TIMP-1), were assessed. Fibrosis was induced by dimethylnitrosamine (DMN) administration in rats. DMN-treated rats were randomly assigned to 1 of 4 groups: saline, Sm (20 mg/kg), Sm (100 mg/kg), or silymarin (100 mg/kg), each given by gavage twice daily for 5 weeks starting from the onset of DMN administration. Sm (200 and 400 microg/ml) significantly inhibited TGF-beta1-stimulated alpha-SMA secretion and the mRNA expressions of alpha-SMA, CTGF, and TIMP-1 in HSC-T6 cells. Fibrosis scores of livers from DMN-treated rats with either a low (1.8 +/- 0.2) or high (1.8 +/- 0.1) dose of Sm, or silymarin (1.4 +/- 0.2) were significantly reduced in comparison with DMN-treated rats receiving saline (3.1 +/- 0.1). Hepatic collagen contents were also significantly reduced by either Sm or silymarin treatment. The mRNA expression levels of alpha-SMA, TGF-beta1, and procollagen I were all attenuated in Sm- and silymarin-treated rats. Moreover, levels of plasma aspartate transaminase activities were reduced by Sm and silymarin treatment. In conclusion, our results show that Sm exerted antifibrotic effects in both HSC-T6 cells and in rats with DMN-induced fibrosis.

Actins↗
PubMed2005

Lectinochemical studies on the glyco-recognition factors of a Tn (GalNAcalpha1-->Ser/Thr) specific lectin isolated from the seeds of Salvia sclarea.

The lectin extracted from the seeds of Salvia sclarea (SSL) recognizes the Tn antigen (GalNAc alpha1-->Ser/Thr) expressed in certain human carcinomas. In previous studies, knowledge of the binding properties of SSL was restricted to GalNAcalpha1--> related oligosaccharides and glycopeptides. Thus, the requirements of functional groups in monosaccharide and high-density polyvalent carbohydrate structural units for SSL binding and an updated affinity profile were further evaluated by enzyme-linked lectinosorbent (ELLSA) and inhibition assays. Among the glycoproteins (gps) tested for interaction, a high density of exposed Tn-containing glycoproteins such as in the armadillo salivary Tn glycoprotein and asialo ovine salivary glycoprotein reacted best with SSL. When the gps were tested for inhibition of SSL binding, which was expressed as 50% nanogram inhibition, the high density polyvalent Tn present in macromolecules was the most potent inhibitor. Among the monosaccharide and carbohydrate structural units studied, which were expressed as nanomole inhibition, GalNAc alpha1-->3GalNAc beta1-->3Gal alpha1-->4Gal beta1-->4Glc (Fp), GalNAc alpha1-->3Gal beta1-->4Glc (A(L)), GalNAc alpha1-->3GalNAc beta1-->Me (F beta), GalNAc alpha1-->3GalNAc alpha1-->Me (F alpha) and GalNAc alpha1--> Ser/Thr (Tn) were the most active ligands, being 2.5-5.0 x 10(3) and 1.25-2.5 times more active than Gal and GalNAc, respectively. From the results, it is suggested that the combining site of SSL is a shallow groove type, recognizing the monosaccharide of GalNAc as the major binding site or Tn up to the Forssman pentasaccharide (Fp). It can be concluded that the three critical factors for SSL binding are the -NH CH(3)CO at carbon-2 in Gal, the configuration of carbon-3 in GalNAc, and the polyvalent Tn (GalNAc alpha1-->Ser/Thr) present in macromolecules. These results should assist in understanding the glyco-recognition factors involved in carbohydrate-lectin interactions in biological processes. The effect of the polyvalent F alpha, F beta and GalNAc beta1-->3Gal alpha1--> (P alpha) glycotopes on binding should be examined. However, this is hampered by the lack of availability of suitable reagents.

Antigens, Tumor-Associated, Carbohydrate↗
PubMed2005

Tanshinone IIA isolated from Salvia miltiorrhiza elicits the cell death of human endothelial cells.

Tanshinone IIA, a major component extracted from the traditional herbal medicine, Salvia miltiorrhiza Bunge, is known to exhibit potent cytotoxicity against various human carcinoma cells in vitro. However, the mechanism by which tanshinone IIA produces this anti-tumor effect remains unknown. Since anti-neovascularization has generally been regarded as an effective strategy for anti-cancer therapy, we decided to investigate the mechanism underlying tanshinone IIA-mediated death of human endothelial cells. In this study, we demonstrate that tanshinone IIA elicits human endothelial cell death independent of oxidative stress. These events are partially calcium-dependent and actually dependent upon NAD(P)H: quinone oxidoreductase (NQO1) activity. Tanshinone IIA induces an increase in intracellular calcium, which triggers the release of cytochrome c, thus causing loss of the mitochondrial membrane potential (MMP), resulting in the subsequent activation of caspases. Blocking the induction of Ca2+ perturbation with BAPTA-AM partially rescued cells from tanshinone IIA-induced cytotoxicity. Additionally, blocking NQO1 activity with dicoumoral or inhibiting caspase activities with the general caspase inhibitor, z-VAD-fmk, prevented cell death induced by tanshinone IIA. Therefore, our results imply that tanshinone IIA-mediated cytotoxicity against human endothelial cells may occur through activation of NQO1, which induces a calcium imbalance and mitochondrial dysfunction, thus stimulating caspase activity.

Abietanes↗
PubMed2006

A novel icetexane diterpene, 5-epi-icetexone from Salvia gilliessi is active against Trypanosoma cruzi.

In this work the effect of a novel compound, 5-epi-icetexone (ICTX) obtained from Salvia gilliessi Benth. (Labiatae), is studied on cultured epimastigotes of Trypanosoma cruzi (Tulahuen). It was found that the compound exerts an antiproliferative effect on the parasites at concentrations between 2.8 and 4.2 microM, and similar sensitivity in other strains (Dm28c, CL-Brener and Y-strain). The compound was deleterious at concentrations higher than 4.2 microM, with an estimated IC50 of 6.5+/-0.75 microM, but with low cytotoxicity to mammalian cells. These effects were irreversible, even at short times of exposure to the drug. In solution, ICTX showed to be stable for at least 96 h at 29 degrees C. With cytostatic dose a little percentage of parasites was resistant to the action of ICTX, and they continued growing although with different kinetic. By electron transmission microscopy, at dose of 4.2 microM an external vesiculization was observed on the first day of exposure to the compound, but the parasite cytoplasm became plenty of vacuoles and exhibited nuclear disorganization from the second day of exposure. It was concluded that ICTX is active against T. cruzi and may act by multiple mechanisms. In future, this novel icetexane diterpene may be a good candidate for therapeutic use against Chagas' disease.

Animals↗
PubMed2004

Inhibition of osteoclast differentiation and bone resorption by tanshinone IIA isolated from Salvia miltiorrhiza Bunge.

Osteoclasts, multinuclear cells specialized for bone resorption, differentiate from the monocyte/macrophage lineage of hematopoietic cells. Intervention in osteoclast differentiation is considered an effective therapeutic approach to the treatment of bone diseases involving osteoclasts. In this study, we found that tanshinone IIA, originating from Salvia miltiorrhiza Bunge, inhibited the differentiation of osteoclasts. Addition of tanshinone IIA to the osteoclast precursor culture caused a significant decrease in the level of calcitonin receptor, c-Src, and integrin beta3 mRNA, which are normally upregulated during the osteoclast differentiation dependent on RANKL (receptor activator of nuclear factor kappa B ligand). RANKL activated the ERK, Akt, and NF-kappaB signal transduction pathways in osteoclast precursor cells, and tanshinone IIA suppressed this activation. Tanshinone IIA also inhibited the bone resorptive activity of differentiated osteoclasts, which was accompanied with the disruption of the actin ring. Thus, tanshinone IIA has the potential to ameliorate bone-resorption diseases in vivo by reducing both the number and activity of osteoclasts.

Abietanes↗
PubMed2006

Cryptotanshinone from Salvia miltiorrhiza BUNGE has an inhibitory effect on TNF-alpha-induced matrix metalloproteinase-9 production and HASMC migration via down-regulated NF-kappaB and AP-1.

Matrix metalloproteinases (MMP-9 and MMP-2) production and smooth muscle cell (SMC) migration may play key roles in the phathogenesis of neointima formation and atherosclerosis. Especially inducible MMP-9 expression was directly involved in the cancer cell invasion and SMC migration through vascular wall. In this study, we reveal that cryptotanshinone (CT) purified from Salvia miltiorrhiza BUNGE had an inhibitory effect on MMP-9 production and migration of human aortic smooth muscle cells treated with TNF-alpha in a dose-dependent manner. The down regulation of transcription of MMP-9 mRNA was evidenced by RT-PCR and MMP-9 promoter assay using luciferase reporter gene. Eletrophoretic mobility shift assay showed NF-kappaB and AP-1 nuclear translocations were suppressed. In addition, Western blot analysis indicated that extracellular signal regulated kinase 1 and 2, p38 and JNK MAP kinase signaling pathways were inhibited. From the results, it is suggested that CT has anti-atherosclerosis and anti-neointimal formation activity.

Cell Movement↗
PubMed2005

New neoclerodane diterpenoids isolated from the leaves of Salvia divinorum and their binding affinities for human kappa opioid receptors.

Bioactivity-guided fractionation of the leaves of Salvia divinorum has resulted in the isolation of three new neoclerodane diterpenoids: divinatorin D (1), divinatorin E (2), and salvinorin G (3), together with 10 known terpenoids, divinatorin C (4), hardwickiic acid (5), salvinorin-A (6), -B (7), -C (8), -D (9), -E (10), and -F (11), presqualene alcohol (12), and (E)-phytol (13). The structures of these three new compounds were characterized by spectroscopic methods. All these compounds were evaluated for their binding affinities to the human kappa opioid receptors. In comparison with divinatorin D (1), divinatorin E (2), and salvinorin G (3), salvinorin A (6) is still the most potent kappa agonist.

Binding, Competitive↗
PubMed2004

Capillary gas chromatography-mass spectrometry of volatile and semi-volatile compounds of Salvia officinalis.

The essential oil and infusion of Salvia officinalis leaves have been widely applied in traditional medicine since ancient times and nowadays subjected to extensive research of their antibacterial, antiviral and cytotoxic properties. This paper shows chemical composition data of S. officinalis leaves essential oil isolated by steam distillation using a Clevenger-type apparatus. Also, the paper presents the chemical content of volatile and semi-volatile compounds of S. officinalis leaves infusion. The volatile and semi-volatile compounds of S. officinalis leaves infusion were isolated by solid-phase extraction (SPE) and liquid-liquid extraction with hexane and dichloromethane. SPE was carried out on 500 mg octadecylsilane (C18) cartridges and elution with dichloromethane. Liquid-liquid extraction was performed with hexane and dichloromethane. The essential oil in dichloromethane and infusion extracts in hexane and dichloromethane were analyzed by gas chromatography coupled with mass spectrometry. The quantitative results obtained by solid-phase extraction and liquid-liquid extraction showed that SPE on C18 performed the highest recovery of the volatile compounds from infusion sample.

Gas Chromatography-Mass Spectrometry↗
PubMed2004

Identification of major active constituents in the fingerprint of Salvia miltiorrhiza Bunge developed by high-speed counter-current chromatography.

High-speed counter-current chromatography was applied as a method to develop fingerprinting of Salvia miltiorrhiza Bunge, a popular traditional Chinese medicine, in our previous study. Important active constituents that were directly related to the therapy effect should be identified. Each effluent fraction and standard samples (cryptotanshinone, tanshinoneI and tanshinoneIIA) were analyzed by ultraviolet spectroscopy and liquid chromatography-mass spectroscopy. It was concluded from the UV-Vis spectrograms, retention times in LC analysis and mass spectrograms, that fractions 7, 8 and 11 were respectively cryptotanshinone (Mr 296), tanshinone I (Mr 276) and tanshinone IIA (Mr 294).

Abietanes↗
PubMed2004

Chemical composition of the essential oil of Salvia multicaulis Vahl. var. simplicifolia Boiss. growing wild in Lebanon.

The essential oil of aerial parts of Salvia multicaulis Vahl. var. simplicifolia Boiss. (Lamiaceae) growing wild in Lebanon was obtained by hydrodistillation and was analysed by GC and GC-MS. 67 compounds constituting 95.2% of the oil were identified, the major components being alpha-copaene (8.0%), alpha-pinene (6.6%), myrtenol (5.7%), trans-sabinyl acetate (5.3%).

Gas Chromatography-Mass Spectrometry↗
PubMed2004

Fingerprinting of Salvia miltiorrhiza Bunge by non-aqueous capillary electrophoresis compared with high-speed counter-current chromatography.

The component of the traditional Chinese medicine (TCM) can be influenced by soil, climate, and growth stage, and fingerprint is an important means in its quality control. Our previous studies showed that high-speed counter-current chromatography (HSCCC) was helpful in the development of fingerprint of TCM. Since the HSCCC method is new, it is necessary to compare it with conventional ones, such as high-performance liquid chromatography (HPLC), thin-layer chromatography (TLC) and high-performance capillary electrophoresis (HPCE). Comparison with HPLC was conducted in our previous study. In this study, HSCCC was compared with non-aqueous capillary electrophoresis (NACE). With NACE, seven stable components were separated within 55 min, respectively, from three crude samples of Salvia miltiorrhiza Bunge from different growth locations. In HSCCC separation, 12 components were separated, respectively, with good correspondence and precision within 13 h. Both NACE and HSCCC were effective in showing whole concentration distribution of all kinds of constituents. Principles of these two methods were very different, which led to different elution sequences and relative contents of peaks. HSCCC showed better performance in analysis of tanshinones, which made its fingerprint containing more chemical information than that of NACE. It was further proven that HSCCC could be a feasible and cost-effective method in the development of the fingerprint of TCM.

Countercurrent Distribution↗
PubMed2006

Salvianolic acid B, an aqueous component of danshen (Salvia miltiorrhiza), relaxes rat coronary artery by inhibition of calcium channels.

In this study, we have investigated the mechanism of action through which salvianolic acid, a constituent of the medicinal herb danshen (Salvia miltiorrhiza), causes relaxation of isolated coronary artery rings precontracted with 1 microM 5-hydroxytryptamine (5-HT). The vasorelaxant effects of salvianolic acid B were also compared with the aqueous extract of danshen. Extraction of the water-soluble fraction from danshen provided a yield of 17.5%. The amount of salvianolic acid B determined in this aqueous extract was 3.9%, and the extract was 6.3 times less potent than salvianolic acid B in relaxing 5-HT-precontracted coronary artery rings; IC(50) values were 930.3+/-133.5 microg/ml and 147.9+/-17.4 microg/ml, respectively. Removal of the endothelium did not significantly affect their vasodilator potencies; IC(50) values were 842.1+/-123.8 mictog/ml and 160.3+/-25.9 microg/ml. On the other hand, a potassium channel inhibitor tetraethylammonium (TEA, 10 mM) shifted their concentration-response curves by 1.7 and 2.9 folds. The possible involvement of Ca(2+) channels was investigated in artery rings incubated with Ca(2+)-free buffer and primed with 1 microM 5-HT or 60 mM KCl for 5 min prior to adding CaCl(2) to elicit contraction. In 5-HT-primed preparations, 2 mg/ml danshen aqueous extract and 0.72 mg/ml salvianolic acid B abolished the CaCl(2)-induced vasoconstriction, whereas, in KCl-primed preparations, 10 mg/ml danshen aqueous extract and 1.44 mg/ml salvianolic acid B produced 90% inhibition. These findings suggest the vasorelaxant effects of danshen aqueous extract and salvianolic acid B were produced by inhibition of Ca(2+) influx in the vascular smooth muscle cells. The opening of K(+) channels had a minor contribution to their effects, but endothelium-dependent mechanisms were not involved. The high vasodilator potency and the quantity of salvianolic acid B contained in danshen aqueous extract suggest it is an important vasodilator constituent in this medicinal herb.

Animals↗
PubMed2006

Drinking of Salvia officinalis tea increases CCl(4)-induced hepatotoxicity in mice.

In a previous study, the drinking of a Salvia officinalis tea (prepared as an infusion) for 14 days improved liver antioxidant status in mice and rats where, among other factors, an enhancement of glutathione-S-transferase (GST) activity was observed. Taking in consideration these effects, in the present study the potential protective effects of sage tea drinking against a situation of hepatotoxicity due to free radical formation, such as that caused by carbon tetrachloride (CCl(4)), were evaluated in mice of both genders. Contrary to what was expected, sage tea drinking significantly increased the CCl(4)-induced liver injury, as seen by increased plasma transaminase levels and histology liver damage. In accordance with the previous study, sage tea drinking enhanced significantly GST activity. Additionally, glutathione peroxidase was also significantly increased by sage tea drinking. Since CCl(4) toxicity results from its bioactivation mainly by cytochrome P450 (CYP) 2E1, the expression level of this protein was measured by Western Blot. An increase in CYP 2E1 protein was observed which may explain, at least in part, the potentiation of CCl(4)-induced hepatotoxicity conferred by sage tea drinking. The CCl(4)-induced hepatotoxicity was higher in females than males. In conclusion, our results indicate that, although sage tea did not have toxic effects of its own, herb-drug interactions are possible and may affect the efficacy and safety of concurrent medical therapy with drugs that are metabolized by phase I enzymes.

Animals↗