hypericum perforatum/tyrosine

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Biochemical activities of extracts from Hypericum perforatum L. 2nd Communication: inhibition of metenkephaline- and tyrosine-dimerization.

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Extracts from the herb "St. John's wort" (Hypericum perforatum L.), besides other activities such as wound healing, antigout, antirheumatic and diuretic properties, are widely used to counteract neurological disorders such as depressive situations, nervousness and sleeplessness. The characteristic

[Cellular and molecular effects of the antidepressant hyperforin on brain cells: Review of the literature].

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BACKGROUND Hypericum perforatum is, with Ginkgo biloba, one of the most frequently prescribed medicinal plants in the world. Its popular name, St. John's wort (SJW), is due to the fact that its flowers, yellow, are gathered around the feast of St. John the Baptist (24th June) whereas "wort" is an

Hypericum Perforatum Hydroalcoholic Extract Mitigates Motor Dysfunction and is Neuroprotective in Intrastriatal 6-Hydroxydopamine Rat Model of Parkinson's Disease.

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Parkinson's disease is the second most common neurodegenerative disorder with selective and progressive decline of nigral dopaminergic neurons. Hypericum perforatum L. (H. perforatum, St. John's wort) has been traditionally used for management of different disorders, especially mild-to-moderate

Biochemical activities of extracts from Hypericum perforatum L. 3rd Communication: modulation of peroxidase activity as a simple method for standardization.

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Alcoholic extracts from the herb "St. John's wort" (Hypericum perforatum L.) are widely used to counteract depressive situations, where the question on the mainly active principle is still under discussion. Thus, standardization of the drug on the basis of dry matter has been chosen instead of the

Effect of Hypericum perforatum L. extract on insulin resistance and lipid metabolic disorder in high-fat-diet induced obese mice.

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Natural product Hypericum perforatum L. has been used in folk medicine to improve mental performance. However, the effect of H. perforatum L. on metabolism is still unknown. In order to test whether H. perforatum L. extract (EHP) has an effect on metabolic syndrome, we treated diet induced obese

Hypericum polyanthemum cyclohexane extract potentiates behavioral effects and neurodegeneration induced by nigral infusions of 6-hydroxydopamine in rats.

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BACKGROUND Parkinson's Disease (PD) is a progressive neurodegenerative disorder, hallmark of which is loss of nigral dopaminergic neurons. Since a Hypericum polyanthemum extract inhibits monoamine reuptake and some of its constituents present cytotoxic properties, the aim of this study was to

Polycyclic phloroglucinols as PTP1B inhibitors from Hypericum longistylum: Structures, PTP1B inhibitory activities, and interactions with PTP1B.

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Protein tyrosine phosphatase 1B (PTP1B) has been regarded asa target for the research and development of new drugs to treat type II diabetes and PTP1B inhibitors are potential lead compounds for this type of new drugs. A phytochemical investigation to obtain new PTP1B inhibitors resulted in the

Inhibition of neutrophil superoxide generation by hypericin, an antiretroviral agent.

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We previously reported that phorbol 12-myristate 13-acetate (PMA)-induced superoxide (O2.-) generation of neutrophils was inhibited by hypericin, a photosensitizing pigment found in St. Johnswort (herb Hypericin triquetrifolium Turra), via a mechanism involving protein kinase C (PKC). To obtain

[Review of pharmacological interactions of oral anticancer drugs provided at pharmacy department].

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OBJECTIVE To identify the pharmacologic interactions of oral anti-cancer drugs provided at an outpatient clinic. METHODS Anti-cancer drugs included in the Phamacotherapeutic Guideline of the Hospital were identified. A literature search was carried out on the pharmacologic interactions in MEDLINE®

Biochemical activities of extracts from Hypericum perforatum L. 1st Communication: inhibition of dopamine-beta-hydroxylase.

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Extracts from the herb "St. John's wort" (Hypericum perforatum L.) are used for the treatment of mental depression, nervousness, sleeplessness and for their wound healing, diuretic and antirheumatic properties. As one biochemical mechanism for depression lack of catecholamine neurotransmitters has

The main components of St John's Wort inhibit low-density lipoprotein atherogenic modification: a beneficial "side effect" of an OTC antidepressant drug?

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Hypericin and pseudohypericin are polycyclic-phenolic structurally related compounds found in Hypericum perforatum L. (St John's wort). As hypericin has been found to bind to LDL one may assume that it can act as antioxidant of LDL lipid oxidation, a property which is of prophylactic/therapeutic

Effects of Hypericum Perforatum, in a rodent model of periodontitis.

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BACKGROUND Hypericum perforatum is a medicinal plant species containing many polyphenolic compounds, namely flavonoids and phenolic acids. In this study we evaluate the effect of Hypericum perforatum in animal model of periodontitis. METHODS Periodontitis was induced in adult male Sprague-Dawley

Phytochemical Profiling and Evaluation of Pharmacological Activities of Hypericum scabrum L.

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Phytochemical investigations of ethyl acetate-soluble part of the aerial part of Hypericum scabrum L. delivered eight pure phenolic compounds 1-8. The pure compounds were identified through physico-chemical, NMR (1D, 2D) and mass spectrometric studies as: 3-8''-bisapigenin (1), quercetin (2),

Hyperoside exhibits anticancer activity in non‑small cell lung cancer cells with T790M mutations by upregulating FoxO1 via CCAT1.

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Acquired epidermal growth factor receptor (EGFR) T790M mutation is the most common mechanism that accounts for EGFR‑TKI (tyrosine kinase inhibitor) resistance of non‑small cell lung cancer (NSCLC). High expense and acquired resistance weaken support for the use of osimertinib for T790M‑positive

Metabolic engineering of the phenylpropanoid pathway in Saccharomyces cerevisiae.

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Flavonoids are valuable natural products derived from the phenylpropanoid pathway. The objective of this study was to create a host for the biosynthesis of naringenin, the central precursor of many flavonoids. This was accomplished by introducing the phenylpropanoid pathway with the genes for

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