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terpene trilactone/hõlmikpuu
Link salvestatakse lõikelauale
Leht 1 alates 54 tulemused
Molecular Cloning, Characterization, and Functional Analysis of Acetyl-CoA C-Acetyltransferase and Mevalonate Kinase Genes Involved in Terpene Trilactone Biosynthesis from Ginkgo biloba.
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Ginkgolides and bilobalide, collectively termed terpene trilactones (TTLs), are terpenoids that form the main active substance of Ginkgo biloba. Terpenoids in the mevalonate (MVA) biosynthetic pathway include acetyl-CoA C-acetyltransferase (AACT) and mevalonate kinase (MVK) as core enzymes. In this
VERIFICATION OF AUTHENTICITY OF GINKGO BILOBA L. LEAF EXTRACT AND ITS PRODUCTS PRESENT ON THE CROATIAN MARKET BY ANALYSIS OF QUANTITY AND RATIO OF GINKGO FLAVONE GLYCOSIDES (QUERCETIN, KAEMPFEROL AND ISORHAMNETIN) TO TERPENE TRILACTONES TO THE EFFECT OF UNMASKING COUNTERFEIT DRUGS ENDANGERING PATIENT HEALTH
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Ginkgo biloba L. is the eldest plant growing on the Earth; preparations made of its leaves and seeds represent an integral part of the Chinese medicine for over a millennium. The plant species was first discovered by Linnaeus in 1771, its name thereby originating from the Latin words
Spectroscopic investigation of Ginkgo biloba terpene trilactones and their interaction with amyloid peptide Abeta(25-35).
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The beneficial effects of Ginkgo biloba extract in the "treatment" of dementia are attributed to its terpene trilactone (TTL) constituents. The interactions between TTLs and amyloid peptide are believed to be responsible in preventing the aggregation of peptide. These interactions have been
Selective dissolution and one step separation of terpene trilactones in ginkgo leaf extracts for GC-FID determination.
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Under ultrasonication, the ginkgo terpene trilactones, ginkgolides and bilobalide, in ginkgo extracts can be selectively dissolved in 10% aqueous NaH(2)PO(4) solution at a temperature of 50-60 degrees C and separated from the solution by extraction with a mixture of ethyl acetate/tetrahydrofuran in
Preparative isolation of terpene trilactones from Ginkgo biloba leaves.
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This study investigated and compared some techniques for the preparative isolation of terpene trilactones, including ginkgolides (GA and GB, etc.) and bilobalide (BB), from Ginkgo biloba leaves. The crude Ginkgo biloba L. extracts (GBE) were prepared using an extractor with solvent refluxing
Validation of an LC-MS/MS assay of terpene trilactones in Ginkgo biloba extracts and pharmaceutical formulations through standard addition method.
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A chromatographic column packed with 1.8 microm particle size octadecyl modified silicagel was used to separate terpene trilactones from Ginkgo biloba extracts/pharmaceutical formulations. Gradient elution was applied, using acidic methanol and water as mobile phase components (0.1% formic acid
Sample preparation and determination of ginkgo terpene trilactones in selected beverage, snack, and dietary supplement products by liquid chromatography with evaporative light-scattering detection.
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Ginkgo biloba leaf extract has been widely used in dietary supplements and more recently in some foods and beverages. Sample preparation procedures for determination of ginkgo terpene trilactones (including bilobalide and ginkgolides A, B, C, and J) in various sample matrixes were developed in this
Effects of single intraperitoneal injections of an extract of Ginkgo biloba (EGb 761) and its terpene trilactone constituents on barbital-induced narcosis in the mouse.
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A mouse model of barbital-induced narcosis was used to examine the effects of single intraperitoneal injections of an extract of Ginkgo biloba (EGb 761), an extract devoid of terpene trilactones (CP 205), and three terpene trilactone constituents of the extract (ginkgolides A and B, bilobalide).
Determination of terpene trilactones in Ginkgo biloba solid oral dosage forms using HPLC with evaporative light scattering detection.
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A reversed phase high performance liquid chromatographic method with evaporative light scattering detection (RP-HPLC-ELSD) was developed for the quantitative determination of the terpene trilactones, ginkgolide A, B, C and J and the sesquiterpene, bilobalide in Ginkgo biloba solid oral dosage forms.
Terpene trilactones from Ginkgo biloba are antagonists of cortical glycine and GABA(A) receptors.
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Glycine and gamma-aminobutyric acid, type A (GABA(A)) receptors are members of the ligand-gated ion channel superfamily that mediate inhibitory synaptic transmission in the adult central nervous system. During development, the activation of these receptors leads to membrane depolarization. Ligands
A method for extraction and quantification of Ginkgo terpene trilactones.
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A method was developed for the extraction and quantification of pharmacologically active terpene trilactones (ginkgolides, bilobalide) from the tissues of Ginkgo biloba L. and pharmaceutical ginkgo products by RP-HPLC, based on the theory of terpene trilactones ionization. Four ginkgolides (GA, GB,
Qualitative and quantitative analyses of ginkgo terpene trilactones by liquid chromatography/sonic spray ionization ion trap mass spectrometry.
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A liquid chromatography/sonic spray ionization mass spectrometry method (LC/SSI-MS) was developed for qualitative and quantitative analyses of ginkgo terpene trilactones. Five ginkgo terpene trilactones were successfully protonated for qualitative and quantitative analyses under the study
Effect of Enzyme Inhibitors on Terpene Trilactones Biosynthesis and Gene Expression Profiling in Ginkgo biloba Cultured Cells.
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The biosynthetic pathway of terpene trilactones of Ginkgo biloba is unclear. In this present study, suspension cultured cells of G. biloba were used to explore the regulation of the mevalonic acid (MVA) and methylerythritol 4-phosphate (MEP) pathways in response to specific enzyme inhibitors
Optimization of extraction technique and validation of developed RP-HPLC-ELSD method for determination of terpene trilactones in Ginkgo biloba leaves.
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Terpene trilactones are potent and selective antagonists of platelet activating factor. The present study deals with standardization of efficient extraction method and validation of newly developed simple, sensitive and rapid reversed phase high performance liquid chromatographic method with
Neurotherapeutic effects of Ginkgo biloba extract and its terpene trilactone, ginkgolide B, on sciatic crush injury model: A new evidence.
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Ginkgo biloba leaves extract (GBE) was subjected to neuroprotective-guided fractionation to produce eleven fractions with different polarities and constituents. The intermediate polar fraction was shown to be terpene trilactones-enriched fraction (TEGBE). Out of this fraction, pure ginkgolide B
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