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Page 1 de 18 résultats
Betulinic acid and betulin ameliorate acute ethanol-induced fatty liver via TLR4 and STAT3 in vivo and in vitro.
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Ethanol consumption leads to many kinds of liver injury and suppresses innate immunity, but the molecular mechanisms have not been fully delineated. The present study was conducted to determine whether betulinic acid (BA) or betulin (BT) would ameliorate acute ethanol-induced fatty liver in mice,
Betulin, betulinic acid and butein are inhibitors of acetaldehyde-induced activation of liver stellate cells.
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Liver fibrosis has been reported to be inhibited in vivo by oleanolic and ursolic acids; however, the activity of other triterpenes like betulin and betulinic acid has not been examined. Butein has also been reported to prevent and partly reverse liver fibrosis in vivo, although its mechanism of
Betulin inhibits lipopolysaccharide/D-galactosamine-induced acute liver injury in mice through activating PPAR-γ.
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Betulin is a phenolic flavonoid which has been reported to possess a mass of pharmacological properties, especially anti-inflammatory activity. The purpose of this study was to explore the protective effects and possible mechanism of betulin against lipopolysaccharide/D-galactosamine
Betulin attenuates lung and liver injuries in sepsis.
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Sepsis is a complex condition with unacceptable mortality. Betulin is a natural extract with multiple bioactivities. This study aims to evaluate the potential effects of betulin on lung and liver injury in sepsis. Cecal ligation and puncture was used to establish the rat model of sepsis. A single
Induction of apoptotic cell death by betulin in multidrug-resistant human renal carcinoma cells.
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Betulin, a triterpene from the bark of various species of birch tree, has various biological effects, including antiviral, antifungal and anticancer activities. The aim of the present study was to elucidate the mechanisms underlying the apoptotic effect of betulin in RCC4 multidrug-resistant human
Betulin protects mice from bacterial pneumonia and acute lung injury.
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Betulin, a naturally occurring triterpene, has shown anti-HIV activity, but details on the anti-inflammatory activity are scanty. In this study, we sought to investigate the effect of Betulin on LPS-induced activation of cell lines with relevance for lung inflammation in vitro and on lung
Protective effect of betulin on cognitive decline in streptozotocin (STZ)-induced diabetic rats.
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Betulin is extracted from birch tree bark and exerts diverse pharmacological activities. The present study was designed to investigate the protective effect of betulin (BE) on cognitive decline in streptozotocin (STZ)-induced diabetic rats. The diabetic model was built by streptozotocin (STZ)
Betulin and betulinic acid attenuate ethanol-induced liver stellate cell activation by inhibiting reactive oxygen species (ROS), cytokine (TNF-α, TGF-β) production and by influencing intracellular signaling.
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OBJECTIVE
Liver fibrosis has been reported to be inhibited in vivo by oleanolic and ursolic acids. However, the mechanisms of the action of those triterpenoids are poorly understood. In this study, we aimed to determine the antifibrotic potential of other triterpenes, betulin and betulinic acid, and
Betulin inhibited cigarette smoke-induced COPD in mice.
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The purpose of the present study was to evaluate the protective effect of betulin (BE) on CS (cigarette smoke)-induced COPD in mice and explore its underlying mechanisms. 60 male ICR mice were randomly assigned to five groups: control group, model group, dexamethasone (2mg/kg) group, BE (20mg/kg)
Antileishmanial activity of semisynthetic lupane triterpenoids betulin and betulinic acid derivatives: synergistic effects with miltefosine.
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Leishmaniasis is a neglected tropical disease (NTDs), endemic in 88 countries, affecting more than 12 million people. The treatment consists in pentavalent antimony compounds, amphotericin B, pentamidine and miltefosine, among others. However, these current drugs are limited due to their toxicity,
A novel caffeoyl triterpene attenuates cerebral ischemic injury with potent anti-inflammatory and hypothermic effects.
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Despite the intense efforts in searching for stroke therapies, an urgent need still exists to explore novel neuroprotective agents for ischemic stroke that have high efficacy and wide therapeutic time-window. Here, we provide the first demonstration that 28-O-caffeoyl betulin (B-CA), a novel
The ameliorative effect of Homalium nepalense on carbon tetrachloride-induced hepatocellular injury in rats.
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The purpose of this study was to evaluate ameliorative effects of Homalium nepalense Benth. (Flacourtiaceae) on CCl4-induced hepatocellular injury in rats. Oxygen-radical absorbance-capacity (ORAC) and cell-based-antioxidant-protection-in-erythrocytes (CAP-e) were performed and found that the ethyl
In vitro cytotoxicity of cyclodextrin-bonded birch bark extract.
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Triterpenoids from birch bark, like betulin, seem to have an anticancer potential which needs to be further investigated. Aim of this study was first to explore whether a cyclodextrin-solubilised triterpenoid extract (STE) from birch bark induces selective cytotoxic effects in primary liver cancer
A derivative of betulinic acid protects human Retinal Pigment Epithelial (RPE) cells from cobalt chloride-induced acute hypoxic stress.
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The Retinal Pigment Epithelium (RPE) is a monolayer of cells located above the choroid. It mediates human visual cycle and nourishes photoreceptors. Hypoxia-induced oxidative stress to RPE is a vital cause of retinal degeneration such as the Age-related Macular Degeneration. Most of these retinal
Inhibition of the sterol regulatory element-binding protein pathway suppresses hepatocellular carcinoma by repressing inflammation in mice.
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Obesity is a critical risk factor for hepatocellular carcinoma (HCC). However, it remains unknown whether inhibition of de novo lipid biosynthesis can suppress HCC. In this study, we blocked the sterol regulatory element-binding protein (SREBP) pathway, one of the key determinants of lipid
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