keyword
MENU ▼
Read by QxMD icon Read
search

Hyperforin

keyword
https://www.readbyqxmd.com/read/28990659/persistence-of-stat-1-inhibition-and-induction-of-cytokine-resistance-in-pancreatic-%C3%AE-cells-treated-with-st-john-s-wort-and-its-component-hyperforin
#1
Michela Novelli, Pascale Beffy, Alex Gregorelli, Svetlana Porozov, Fabrizio Mascia, Chiara Vantaggiato, Pellegrino Masiello, Marta Menegazzi
OBJECTIVES: St John's wort extract (SJW) and its component hyperforin (HPF) were shown to potently inhibit cytokine-induced STAT-1 and NF-κB activation in pancreatic β cells and protect them against injury. This study aimed at exploring the time course of STAT-1 inhibition afforded by these natural compounds in the β-cell line INS-1E. METHODS: INS-1E cells were pre-incubated with SJW extract (2-5 μg/ml) or HPF (0.5-2 μm) and then exposed to a cytokine mixture...
October 9, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28982580/stimulation-of-transient-receptor-potential-m3-trpm3-channels-increases-interleukin-8-gene-promoter-activity-involving-ap-1-and-extracellular-signal-regulated-protein-kinase
#2
Sandra Rubil, Andrea Lesch, Naofumi Mukaida, Gerald Thiel
Stimulation of Ca(2+) permeable TRPM3 (transient receptor potential melastatin-3) channels with the steroid ligand pregnenolone sulfate activates stimulus-responsive transcription factors, including the transcription factor AP-1 (activator protein-1). As part of a search for AP-1-regulated target genes we analyzed the gene encoding interleukin-8 (IL-8) in HEK293 cells expressing TRPM3 channels. Here, we show that stimulation of TRPM3 channels activated transcription of an IL-8 promoter-controlled reporter gene that was embedded into the chromatin of the cells...
October 2, 2017: Cytokine
https://www.readbyqxmd.com/read/28961505/hyperforin-attenuates-aluminum-induced-a%C3%AE-production-and-tau-phosphorylation-via-regulating-akt-gsk-3%C3%AE-signaling-pathway-in-pc12-cells
#3
Wanyue Huang, Ping Cheng, Kaiyuan Yu, Yanfei Han, Miao Song, Yanfei Li
Aluminum (Al) is a neurotoxicant and cause β-amyloid (Aβ) peptides aggregation and tau hyperphosphorylation. Hyperforin (HF) is one of the major active constituents of the extracts of St. John's Wort (Hypericum perforatum), can treat Alzheimer's disease (AD) and other diseases involving peptide accumulation and cognition impairment. To determine the effects of HF on Al-induced Aβ formation and tau hyperphosphorylation, PC12 cells were cultured and treated with Al-malt (500μM) and/or HF (1μM). The results showed that HF treatment significantly attenuated Al-malt-induced Aβ1-42 production by reducing the expressions of APP, BACE1 and PS1, while increasing the expressions of sAPPα, ADAM9/10/17, and tau phosphorylation in PC12 cells...
September 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28943862/the-chemical-and-antibacterial-evaluation-of-st-john-s-wort-oil-macerates-used-in-kosovar-traditional-medicine
#4
James T Lyles, Austin Kim, Kate Nelson, Angelle L Bullard-Roberts, Avni Hajdari, Behxhet Mustafa, Cassandra L Quave
Hypericum perforatum L. (Hypericaceae), or St. John's Wort, is a well-known medicinal herb often associated with the treatment of anxiety and depression. Additionally, an oil macerate (Oleum Hyperici) of its flowering aerial parts is widely used in traditional medicine across the Balkans as a topical wound and ulcer salve. Other studies have shown that Oleum Hyperici reduces both wound size and healing time. Of its active constituents, the naphthodianthrone hypericin and phloroglucinol hyperforin are effective antibacterial compounds against various Gram-positive bacteria...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28885074/clinical-risks-of-st-john-s-wort-hypericum-perforatum-co-administration
#5
REVIEW
Samaneh Soleymani, Roodabeh Bahramsoltani, Roja Rahimi, Mohammad Abdollahi
St. John's wort (SJW) is a common medicinal herb used for the treatment of mild to moderate depression. Hyperforin, one of the chief components of SJW, plays an important role in the induction of cytochrome P450 enzymes (CYP) and P-glycoprotein transporter (P-gp), and therefore, affects the pharmacokinetics of various drugs. There are several clinical studies demonstrating the interaction of SJW with the metabolism of conventional drugs which may cause life-threatening events. Areas covered: This review focuses on human studies that have evaluated pharmacokinetic alterations of conventional drugs in concomitant use with different SJW preparations...
October 2017: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/28870826/hyperforin-protects-against-acute-cerebral-ischemic-injury-through-inhibition-of-interleukin-17a-mediated-microglial-activation
#6
Li Ma, Xia Pan, Fang Zhou, Kang Liu, Long Wang
Hyperforin, a pharmacologically active component of the medicinal plant Hypericum perforatum (St. John's wort), has been shown to be neuroprotective against acute ischemic stroke. However, the underlying mechanisms are still unclear and need to be fully elucidated. C57BL/6 wildtype (WT) mice or interleukin (IL)-17A knock-out mice were subjected to middle cerebral artery occlusion (60 minutes) followed by reperfusion for 72 hours. Hyperforin (0.5 μg) was injected slowly into the right ventricle of WT mice 1, 24 and 48 hours after middle cerebral artery occlusion (MCAO) onset...
September 1, 2017: Brain Research
https://www.readbyqxmd.com/read/28870756/stabilization-of-hyperforin-dicyclohexylammonium-salt-with-dissolved-albumin-and-albumin-nanoparticles-for-studying-hyperforin-effects-on-2d-cultivation-of-keratinocytes-in-vitro
#7
J Füller, T Kellner, M Gaid, L Beerhues, C C Müller-Goymann
Due to the limited chemical stability of the natural hyperforin molecule, a more stable form of hyperforin, i.e., the hyperforin dicyclohexylammonium salt (HYP-DCHA) has been used for ex vivo and in vitro experiments in recent years, but its actual stability under typical cell culture conditions has never been studied before. In this contribution the stability of HYP-DCHA was examined under typical cell culture conditions. Different cell culture media with and without fetal calf serum (FCS) supplementation were studied with regard to further stabilization of HYP-DCHA determined with HPLC analysis...
September 1, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28722156/chemometric-evaluation-of-hypericin-and-related-phytochemicals-in-17-in-vitro-cultured-hypericum-species-hairy-root-cultures-and-hairy-root-derived-transgenic-plants
#8
Katarína Nigutová, Souvik Kusari, Selahaddin Sezgin, Linda Petijová, Jana Henzelyová, Miroslava Bálintová, Michael Spiteller, Eva Čellárová
OBJECTIVES: The objective of this study was to ascertain the presence and correlations among eight important secondary metabolites viz. hypericin, pseudohypericin, emodin, hyperforin, rutin, hyperoside, quercetin and quercitrin in different organs of 17 in vitro cultured Hypericum species, along with H. tomentosum and H. tetrapterum hairy root cultures, and hairy root-derived transgenic plants of H. tomentosum. METHODS: Samples were extracted and analysed by LC-MS...
July 19, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28696436/reduced-trpc6-mrna-levels-in-the-blood-cells-of-patients-with-alzheimer-s-disease-and-mild-cognitive-impairment
#9
R Lu, J Wang, R Tao, J Wang, T Zhu, W Guo, Y Sun, H Li, Y Gao, W Zhang, C J Fowler, Q Li, S Chen, Z Wu, C L Masters, C Zhong, N Jing, Y Wang, Y Wang
Transient receptor potential canonical 6 (TRPC6) inhibits β-amyloid (Aβ) production. Hyperforin, the TRPC6 agonist, reduces Aβ levels and improves cognitive performance in Alzheimer's disease (AD) models. However, it's unknown whether TRPC6 expression is changed in AD patients. In this case-control study, we measured TRPC6 expression levels in the peripheral blood cells of four independent AD sets from five hospitals and one mild cognitive impairment (MCI) set from a local community (229 AD, 70 MCI, 40 Parkinson disease and 359 controls from China, total n=698) using quantitative real-time PCR assay...
July 11, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28669795/downstream-processing-of-hyperforin-from-hypericum-perforatum-root-cultures
#10
Paul Haas, Mariam Gaid, Ajmal Zarinwall, Ludger Beerhues, Stephan Scholl
Hyperforin is a major metabolite of the medicinal plant Hypericum perforatum (St. John's Wort) and has recently been found in hormone induced root cultures. The objective of this study is to identify a downstream process for the production of a hyperforin-rich extract with maximum extraction efficiency and minimal decomposition. The maximum extraction time was found to be 60min. The comparison of two equipment concepts for the extraction and solvent evaporation was performed employing two different solvents...
June 29, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28472287/optimized-and-validated-hplc-analysis-of-st-john-s-wort-extract-and-final-products-by-simultaneous-determination-of-major-ingredients
#11
Konstantina Zeliou, Nikos I Kontaxis, Evangelia Margianni, Christos Petrou, Fotini N Lamari
Aim of this work was to develop a validated high performance liquid chromatography method for the analysis of extracts and final products of St. John's wort, according to international guidelines for bioanalytical method validation. Chromatographic separation was performed on a C18 column with a combination of gradient and isocratic steps; the mobile phase composed of ammonium acetate solution (pH 4.5; 10 mM), acetonitrile and methanol. Quantification and method validation was performed using extract spiked with external reference standards of chlorogenic acid, rutin, hyperoside, isoquercitrin, quercetin and hypericin...
September 1, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28432535/exploring-the-carbamazepine-interaction-with-human-pregnane-x-receptor-and-effect-on-abcc2-using-in-vitro-and-in-silico-approach
#12
Gurpreet K Grewal, Khuraijam D Singh, Neha Kanojia, Chitra Rawat, Samiksha Kukal, Ajay Jajodia, Anshika Singhal, Richa Misra, Selvaraman Nagamani, Karthikeyan Muthusamy, Ritushree Kukreti
PURPOSE: Over expression of ATP-binding cassette transporters is considered one of the major reasons for non-responsiveness to antiepileptic drugs. Carbamazepine (CBZ), one of first line antiepileptic drug is known to influence ABCC2 expression but its exact molecular mechanism is unknown. METHODS: We investigated the effect of CBZ on expression of ABCC2 and pregnane X receptor (PXR) in HepG2 cell line and compared with hyperforin (agonist of PXR) and ketoconazole (antagonist of PXR) through realtime PCR and western blot assay...
April 21, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28377273/biotechnological-production-of-hyperforin-for-pharmaceutical-formulation
#13
REVIEW
Mariam Gaid, Eline Biedermann, Jendrik Füller, Paul Haas, Sönke Behrends, Rainer Krull, Stephan Scholl, Ute Wittstock, Christel Müller-Goymann, Ludger Beerhues
Hyperforin is a major active constituent of Hypericum perforatum (St. John's wort). It has amazing pharmacological activities, such as antidepressant properties, but it is labile and difficult to synthesize. Its sensitivity and lipophilicity are challenges for processing and formulation. Its chemical complexity provokes approaches of biotechnological production and modification. Dedifferentiated H. perforatum cell cultures lack appropriate storage sites and hence appreciable hyperforin levels. Shoot cultures are capable of forming hyperforin but less suitable for biomass up-scaling in bioreactors...
April 2, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28288835/anti-proliferative-and-anti-migratory-effects-of-hyperforin-in-2d-and-3d-artificial-constructs-of-human-dermal-fibroblasts-a-new-option-for-hypertrophic-scar-treatment
#14
J Füller, C C Müller-Goymann
No abstract text is available yet for this article.
March 10, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28216196/hypericum-perforatum-st-john-s-wort-beyond-depression-a-therapeutic-perspective-for-pain-conditions
#15
REVIEW
Nicoletta Galeotti
ETHNOPHARMACOLOGICAL RELEVANCE: Hypericum perforatum L. (Hypericaceae), popularly called St. John's wort (SJW), has a rich historical background being one of the oldest used and most extensively investigated medicinal herbs. Many bioactivities and applications of SJW are listed in popular and in scientific literature, including antibacterial, antiviral, anti-inflammatory. In the last three decades many studies focused on the antidepressant activity of SJW extracts. However, several studies in recent years also described the antinociceptive and analgesic properties of SJW that validate the traditional uses of the plant in pain conditions...
March 22, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28210627/hyperforin-hp-%C3%AE-cyclodextrin-enhances-mechanosensitive-ca-2-signaling-in-hacat-keratinocytes-and-in-atopic-skin-ex-vivo-which-accelerates-wound-healing
#16
Hiroya Takada, Jun Yonekawa, Masami Matsumoto, Kishio Furuya, Masahiro Sokabe
Cutaneous wound healing is accelerated by mechanical stretching, and treatment with hyperforin, a major component of a traditional herbal medicine and a known TRPC6 activator, further enhances the acceleration. We recently revealed that this was due to the enhancement of ATP-Ca(2+) signaling in keratinocytes by hyperforin treatment. However, the low aqueous solubility and easy photodegradation impede the topical application of hyperforin for therapeutic purposes. We designed a compound hydroxypropyl-β-cyclodextrin- (HP-β-CD-) tetracapped hyperforin, which had increased aqueous solubility and improved photoprotection...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28147885/bioactive-compounds-from-hypericum-humifusum-and-hypericum-perfoliatum-inhibition-potential-of-polyphenols-with-acetylcholinesterase-and-key-enzymes-linked-to-type-2-diabetes
#17
Afef Béjaoui, Issam Ben Salem, Nesrine Rokbeni, Yassine M'rabet, Mohamed Boussaid, Abdennacer Boulila
CONTEXT: Natural products are reported to have a wide spectrum of pharmacological properties such as antimicrobial, anti-inflammatory and anti-cholinesterase. The genus Hypericum (Hypericaceae) is a source of a variety of molecules with different biological activities, notably hypericin and various phenolics. OBJECTIVES: The goals of the present work were the determination of total phenolic and flavonoid content, hypericin and hyperforin concentration as well as the evaluation of biological of Hypericum humifusum L...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28117734/hyperforin-exhibits-antigenotoxic-activity-on-human-and-bacterial-cells
#18
Petronela Imreova, Jana Feruszova, Stanislav Kyzek, Kristina Bodnarova, Martina Zduriencikova, Katarina Kozics, Pavel Mucaji, Eliska Galova, Andrea Sevcovicova, Eva Miadokova, Ivan Chalupa
Hyperforin (HF), a substance that accumulates in the leaves and flowers of Hypericum perforatum L. (St. John's wort), consists of a phloroglucinol skeleton with lipophilic isoprene chains. HF exhibits several medicinal properties and is mainly used as an antidepressant. So far, the antigenotoxicity of HF has not been investigated at the level of primary genetic damage, gene mutations, and chromosome aberrations, simultaneously. The present work is designed to investigate the potential antigenotoxic effects of HF using three different experimental test systems...
January 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28110963/hyperforin-activates-gene-transcription-involving-transient-receptor-potential-c6-channels
#19
Gerald Thiel, Oliver G Rössler
Hypericum perforatum is one of the most prominent medical plants. Hyperforin, a main ingredient of H. perforatum, has been shown to activate transient receptor potential canonical C6 (TRPC6) channels. Alternatively, it has been proposed that hyperforin functions as a protonophore in a TRPC6-independent manner. Here, we show that hyperforin stimulation activates the transcription factor AP-1 in HEK293 cells expressing TRPC6 (T6.11 cells), but did not substantially change the AP-1 activity in HEK293 cells lacking TRPC6...
April 1, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28064110/clinical-use-of-hypericum-perforatum-st-john-s-wort-in-depression-a-meta-analysis
#20
REVIEW
Qin Xiang Ng, Nandini Venkatanarayanan, Collin Yih Xian Ho
INTRODUCTION: St John's wort is a popular herbal remedy recommended by Traditional Chinese Medicine (TCM) practitioners and licensed and widely prescribed for depression in many European countries. However, conflicting data regarding its benefits and risks exist, and the last large meta-analysis on St John's wort use for depression was done in 2008, with no updated meta-analysis available. METHODS: Using the keywords [St John's Wort OR Hypericum perforatum OR hypericin OR hyperforin OR johanniskraut OR] AND [depression OR antidepressant OR SSRI], a preliminary search (without language restriction) on the PubMed, Ovid, Clinical Trials Register of the Cochrane Collaboration Depression, Anxiety and Neurosis Group, Cochrane Field for Complementary Medicine, China National Knowledge Infrastructure and WanFang database yielded 5428 papers between 1-Jan-1960 and 1-May-2016...
March 1, 2017: Journal of Affective Disorders
keyword
keyword
43818
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"