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adhyperforin/υπερικό
Ο σύνδεσμος αποθηκεύεται στο πρόχειρο
Σελίδα 1 από 37 Αποτελέσματα
Mass spectral characterization of phloroglucinol derivatives hyperforin and adhyperforin.
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Σύνδεση εγγραφή
Active phloroglucinol constituents of Hypericum perforatum (St. John's wort) extracts, hyperforin and adhyperforin, have been studied following ion activation using tandem mass spectrometry (MS/MS) and complemented by accurate mass measurements. These two compounds were readily analyzed as
Biosynthesis of hyperforin and adhyperforin from amino acid precursors in shoot cultures of Hypericum perforatum.
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Σύνδεση εγγραφή
Hyperforin and adhyperforin contribute to the antidepressant effects of Hypericum perforatum. The involvement of branched-chain amino acids in the biosynthesis of hyperforin and adhyperforin was demonstrated in H. perforatum shoot cultures. L-[U-(13)C(5)]Valine and L-[U-(13)C(6)]isoleucine, upon
Adhyperforin as a contributor to the effect of Hypericum perforatum L. in biochemical models of antidepressant activity.
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Σύνδεση εγγραφή
The present paper describe investigations which demonstrate that hyperforin is not the only phloroglucinol derivative in extracts of the medicinal plant Hypericum perforatum L., which possess a biological activity. Hyperforin was the major lipophilic constituent in two different extracts, whereas
Antidepressant-like activity of adhyperforin, a novel constituent of Hypericum perforatum L.
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Adhyperforin is a novel constituent of Hypericum perforatum L., but its antidepressant-like activity remains unclear. To explore that, several well-validated animal models of depression as well as neurotransmitter reuptake and transporter binding assays were conducted. The results showed
Adhyperforin: A Homologue of Hyperforin from Hypericum perforatum.
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Antidepressant activity of hyperforin conjugates of the St. John's wort, Hypericum perforatum Linn.: an experimental study.
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Nine extracts of H. perforatum, containing hyperforin in conjugated forms, but devoid of free hyperforin and adhyperforin, were subjected to antidepressant screening using the forced swim test (FST). The observed activity was compared with that of SJW extracts containing hyperforin and adhyperforin
High performance liquid chromatography/electrospray mass spectrometry of Hypericum perforatum extracts.
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Σύνδεση εγγραφή
Hypericum perforatum L. (St. John's Wort) is a widely distributed herbaceous perennial plant which has been well known as a medicinal plant since antiquity. In recent years, H. perforatum has received increasing attention for the treatment of depression and other neuralgic disorders. The main
Determination of naphthodianthrones and phloroglucinols from Hypericum perforatum extracts by liquid chromatography/tandem mass spectrometry.
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Σύνδεση εγγραφή
Hypericum perforatum L. (St. John's Wort) has long been known as a medicinal plant, and has been used for the treatment of depression and neuralgic disorders. Its main active constituents are believed to be a naphthodianthrone, hypericin, and a phloroglucinol, hyperforin. A sensitive high
Improved procedure for the quality control of Hypericum perforatum L.
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Σύνδεση εγγραφή
A new, fast and reliable procedure for the quantification of the major compounds of Hypericum perforatum L. has been developed. Four naphthodianthrones (protopseudohypericin, pseudohypericin, protohypericin, hypericin) and two phloroglucinols (hyperforin, adhyperforin) were assayed by HPLC using a
Fast high-performance liquid chromatographic analysis of naphthodianthrones and phloroglucinols from Hypericum perforatum extracts.
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Σύνδεση εγγραφή
Hypericum perforatum L. (St. John's Wort) has been used in modern medicine for treatments of depression and neuralgic disorders. An HPLC method with photodiode array detection for the rapid determination of the major active compounds, naphthodianthrones and phloroglucinols, has been developed. The
Characterization of supercritical fluid extracts of St. John's wort (Hypericum perforatum L.) by HPLC-MS and GC-MS.
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Supercritical fluid extracts (carbon dioxide without modifiers) of St. John's Wort (Hypericum perforatum L., Clusiaceae) were analyzed by GC-MS, HPLC-DAD and HPLC-DAD-MS. Besides the dominating phloroglucinols hyperforin (36.5 +/- 1.1%) and adhyperforin (4.6 +/- 0.1%), the extracts mainly contained
Separation of hypericins and hyperforins in extracts of Hypericum perforatum L. using non-aqueous capillary electrophoresis with reversed electro-osmotic flow.
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The separation of the lipophilic compounds in extracts of Hypericum perforatum L. is demonstrated in a non-aqueous capillary electrophoresis system with reversed electro-osmotic flow. Solvent mixtures of methanol, dimethylsulfoxide and N-methylformamide were used for the electrophoresis media, with
Molecular cloning and tissue-specific expression of two cDNAs encoding polyketide synthases from Hypericum perforatum.
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Two previously uncharacterized cDNAs encoding for polyketide synthases (PKSs), designated as HpPKS1 and HpPKS2, were isolated from Hypericum perforatum. The full-length HpPKS1 was 1573bp containing an open reading frame (ORF) of 1161bp encoding for a 386 amino acid protein. The full-length cDNA of
Enrichment of hyperforin from St. John's wort (Hypericum perforatum) by pilot-scale supercritical carbon dioxide extraction.
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St. John's Wort (Hypericum perforatum L.) was extracted with supercritical carbon dioxide using a pilot batch extraction plant. The effects of pressure, temperature, flow rate and extraction time were examined with respect to extraction yield and hyperforin content. Supercritical carbon dioxide
Identification of the major constituents of Hypericum perforatum by LC/SPE/NMR and/or LC/MS.
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The newly established hyphenated instrumentation of LC/DAD/SPE/NMR and LC/UV/(ESI)MS techniques have been applied for separation and structure verification of the major known constituents present in Greek Hypericum perforatum extracts. The chromatographic separation was performed on a C18 column.
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