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13 resultater
Isolation of saponins with the inhibitory effect on nitric oxide, prostaglandin E2 and tumor necrosis factor-alpha production from Pleurospermum kamtschaticum.
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As an attempt to search for bioactive natural products exerting antiinflammatory activity, we have isolated two saponins were isolated from the aerial portion of Pleurospermum kamtschaticum (Umbelliferae) by nitrite assay activity-directed chromatographic fractionation. They were identified as
C21-steroidal pregnane sapogenins and their derivatives as anti-inflammatory agents.
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During the screening of natural anti-inflammatory agent, we identified some C21-steroidal pregnane sapogenins or the derivatives to inhibit TLR2, TLR3, and TLR4-initiatedinflammatory responses respectively. Treatment with active compounds 10, 2j and 3p failed to impact tumor necrosis factor-α
Accumulation of sapogenin conjugates and histological changes in the liver and kidneys of lambs suffering from alveld, a hepatogenous photosensitization disease of sheep grazing Narthecium ossifragum.
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Sixteen lambs exhibiting hepatogenous photosensitization (alveld) after grazing pasture containing Narthecium ossifragum and seven nonphotosensitized lambs grazing the same pastures were studied. All the alveld-affected lambs revealed liver damage dominated by single cell necrosis, portal
Diosgenin ameliorates palmitate-induced endothelial dysfunction and insulin resistance via blocking IKKβ and IRS-1 pathways.
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OBJECTIVE
We investigated whether diosgenin, a widely used steroidal sapogenin, exerted protection against palmitate (PA)-induced inflammation and insulin resistance in the endothelium.
METHODS
Human umbilical vein endothelial cells (HUVECs) were pretreated with diosgenin for 30 min, and then
Toxicity testing of saponin-containing Yucca schidigera Roetzl. juice in relation to hepato- and nephrotoxicity of Narthecium ossifragum (L.) Huds.
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Yucca schidigera juice in doses of 1.5 g (63 mg sapogenin) and 3.0 g (126 mg sapogenin) per kg live weight was administered intraruminally to 30 lambs for 21 days to investigate whether the saponins in Y. schidigera were toxic to lambs and whether they could cause hepatogenous photosensitisation.
Triterpene saponins from Vietnamese ginseng (Panax vietnamensis) and their hepatocytoprotective activity.
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The methanol extract of Vietnamese ginseng (Panax vietnamensis) was found to possess hepatocytoprotective effects on D-galactosamine (D-GalN)/tumor necrosis factor-alpha (TNF-alpha)-induced cell death in primary cultured mouse hepatocytes. Further chemical investigation of the extract afforded two
Diosgenin Protects Rats from Myocardial Inflammatory Injury Induced by Ischemia-Reperfusion.
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BACKGROUND Diosgenin, a phytosteroid sapogenin, has anti-inflammatory properties shown to reduce myocardial ischemia-reperfusion injury (MIRI). However, the specific mechanism by which this is achieved is not clear. This study investigated the protective effects of diosgenin on myocardial
Possible mechanism of the anti-inflammatory activity of ruscogenin: role of intercellular adhesion molecule-1 and nuclear factor-kappaB.
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Ruscogenin (RUS), first isolated from Ruscus aculeatus, also a major steroidal sapogenin of traditional Chinese herb Radix Ophiopogon japonicus, has been found to exert significant anti-inflammatory and anti-thrombotic activities. Our previous studies suggested that ruscogenin remarkably inhibited
Synthesis and selective anticancer activity of steroidal glycoconjugates.
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The synthesis of glucosamine derivatives of the steroidal sapogenins diosgenin and hecogenin using the N-phthaloyl protected trichloroacetimidate of d-glucosamine as donor and TMSOTf as promoter is reported. The corresponding glycoconjugates were transformed into their acetamido derivatives and the
25-OCH3-PPD induces the apoptosis of activated t-HSC/Cl-6 cells via c-FLIP-mediated NF-κB activation.
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25-OCH(3)-PPD is a dammarane-type triterpene sapogenin isolated from the roots, leaves and seeds of Panax notoginseng, which has shown anti-tumor effects in several human cancer lines. In this study, we evaluated the effects of 25-OCH(3)-PPD on apoptosis of activated t-HSC/Cl-6 cells induced by
Ruscogenin reduces cerebral ischemic injury via NF-κB-mediated inflammatory pathway in the mouse model of experimental stroke.
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Transient cerebral ischemia initiates a complex series of inflammatory events, which has been associated with an increase in behavioral deficits and secondary brain damage. Ruscogenin is a major steroid sapogenin in the traditional Chinese herb Ophiopogon japonicus that have multiple bioactivities.
Diosgenin, an Activator of 1,25D3-MARRS Receptor/ERp57, Attenuates the Effects of TNF-α by Causing ADAM10-Dependent Ectodomain Shedding of TNF Receptor 1.
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OBJECTIVE
We investigated how diosgenin, a steroidal sapogenin, has anti-tumor necrosis factor-α (TNF-α) effects in human aortic endothelial cells (HAECs).
METHODS
Tumor necrosis factor receptor 1 (TNFR1) was assessed by Western blot analysis. Intracellular Ca2+ was measured using Fluo-4 AM.
Potent therapeutic effects of ruscogenin on gastric ulcer established by acetic acid.
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