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Biological evaluation of hyperforin and its hydrogenated analogue on bacterial growth and biofilm production.

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Bacterial biofilms are organized communities of microorganisms, embedded in a self-produced matrix, growing on a biotic surface and resistant to many antimicrobial agents when associated with a medical device. These biofilms require the development of new strategies for the prevention and treatment

Hyperforin in St. John's wort drug interactions.

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Recently, interactions of herbal medicines with synthetic drugs came into focus of particular interest. In the past 3 years, more than 50 papers were published regarding interactions between St. John's wort (Hypericum perforatum L.; SJW) and prescription drugs. Co-medication with SJW resulted in

Mass spectral characterization of phloroglucinol derivatives hyperforin and adhyperforin.

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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

Hypericin and hyperforin production in St. John's wort in vitro culture: influence of saccharose, polyethylene glycol, methyl jasmonate, and Agrobacterium tumefaciens.

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Influence of saccharose in the presence or absence of polyethylene glycol (PEG), methyl jasmonate, and an inactivated bacterial culture of Agrobacterium tumefaciens in cultivation medium on morphology of Hypericum perforatum L. and production of hypericin and hyperforin was studied under in vitro

Hyperforin as a possible antidepressant component of hypericum extracts.

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We demonstrate that the phloroglucinol derivative hyperforin is not only the major lipophilic chemical constituent of the medicinal plant Hypericum perforatum (St. John's wort) but also a potent uptake inhibitor of serotonin (5-HT), dopamine (DA), noradrenaline (NA), GABA and L-Glutamate with IC50

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

Hyperforin depletes synaptic vesicles content and induces compartmental redistribution of nerve ending monoamines.

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Hyperforin, a phloroglucinol derivative found in Hypericum perforatum (St. John's wort) extracts has antidepressant properties in depressed patients. Hyperforin has a unique pharmacological profile and it inhibits uptake of biogenic monoamines as well as amino acid transmitters. We have recently

Hyperforin down-regulates effector function of activated T lymphocytes and shows efficacy against Th1-triggered CNS inflammatory-demyelinating disease.

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Hyperforin (Hyp) is an active compound contained in the extract of Hypericum perforatum, well known for its antidepressant activity. However, Hyp has been found to possess several other biological properties, including inhibitory effects on tumor invasion, angiogenesis, and inflammation. In this

Potential antidepressant properties of IDN 5491 (hyperforin-trimethoxybenzoate), a semisynthetic ester of hyperforin.

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Hyperforin is one of the possible active principles mediating the antidepressant activity of Hypericum perforatum L. extracts. The ester derivative IDN 5491 (hyperforin-trimethoxybenzoate) showed antidepressant-like properties in the forced swimming test (FST) in rats, with no effect on open-field

Hyperforin blocks neutrophil activation of matrix metalloproteinase-9, motility and recruitment, and restrains inflammation-triggered angiogenesis and lung fibrosis.

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Hyperforin (Hyp), a polyphenol-derivative of St. John's wort (Hypericum perforatum), has emerged as key player not only in the antidepressant activity of the plant but also as an inhibitor of bacteria lymphocyte and tumor cell proliferation, and matrix proteinases. We tested whether as well as

St. John's wort (Hypericum perforatum) and breastfeeding: plasma and breast milk concentrations of hyperforin for 5 mothers and 2 infants.

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BACKGROUND Herbal preparations for depression, such as St. John's wort, are often preferred over pharmaceutical preparations by mothers and midwives after childbirth because these preparations are available to patients as over-the-counter "natural" treatments and are popularly assumed to be safe.

Stimulation of glutamate, aspartate and gamma-aminobutyric acid release from synaptosomes by hyperforin.

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Hyperforin is one pharmacologically active constituent of the medicinal herb Hypericum perforatum. The mechanism of its antidepressant-like activity is currently considered to be the inhibition of synaptic reuptake of neurotransmitters. Here, we will demonstrate that it also stimulates the release

In vitro effects of the dicyclohexylammonium salt of hyperforin on interleukin-6 release in different experimental models.

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Cytokine hypersecretion might be involved in the onset and maintenance of depressive disorders and it has been suggested that St. John's wort extracts (Hypericum perforatum, SJW) might exert their antidepressant-like effects by affecting peripheral interleukin-6 (IL6) expression. We found that

Mechanisms of Hyperforin as an anti-angiogenic angioprevention agent.

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Hyperforin, the major lipophilic compound contained in extracts of Hypericum perforatum, is responsible for the antidepressant activity associated with the extract. Recently, several other biological properties of Hyperforin have been unveiled including inhibition of tumour invasion and

Inhibition of vesicular uptake of monoamines by hyperforin.

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Hyperforin is the major active ingredient of Hypericum perforatum (St John's Wort), a traditional antidepressant medication. This study evaluated its inhibitory effects on the synaptic uptake of monoamines in rat forebrain homogenates, comparing the nature of the inhibition at synaptic and vesicular

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