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Planta Medica

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https://www.readbyqxmd.com/read/28628927/curcumin-promotes-apoptosis-of-activated-hepatic-stellate-cells-by-inhibiting-protein-expression-of-the-myd88-pathway
#1
Ya-Jun He, Kenny Kuchta, Yan-Mei Deng, Silke Cameron, Yu Lin, Xu-You Liu, Guo-Ron Ye, Xia Lv, Yuta Kobayashi, Jian-Chang Shu
Activation and proliferation of hepatic stellate cells (HSC) play an important role in the progress of liver fibrosis. HSC activation occurs in response to inflammatory cytokines, cellular interactions with immune cells, and morphogenetic signals. The literature hints to a role of the adaptor protein MyD88 in fibrosis. Although curcumin has been shown to exert inhibitory effects on the proliferation of HSC in vitro, its influence on the MyD88 pathway in HSC has remained unclear. Here, we investigated whether curcumin accelerates apoptosis of HSC through the MyD88 pathway...
June 19, 2017: Planta Medica
https://www.readbyqxmd.com/read/28614869/a-rosa-canina-urtica-dioica-harpagophytum-procumbens-zeyheri-combination-significantly-reduces-gonarthritis-symptoms-in-a-randomized-placebo-controlled-double-blind-study
#2
Margret Moré, Joerg Gruenwald, Ute Pohl, Ralf Uebelhack
The special formulation MA212 (Rosaxan) is composed of rosehip (Rosa canina L.) puree/juice concentrate, nettle (Urtica dioica L.) leaf extract, and devil's claw (Harpagophytum procumbens DC. ex Meisn. or Harpagophytum zeyheri Decne.) root extract and also supplies vitamin D. It is a food for special medical purposes ([EU] No 609/2013) for the dietary management of pain in patients with gonarthritis.This 12-week randomized, placebo-controlled double-blind parallel-design study aimed to investigate the efficacy and safety of MA212 versus placebo in patients with gonarthritis...
June 14, 2017: Planta Medica
https://www.readbyqxmd.com/read/28597454/inhibition-of-human-cancer-cell-growth-by-analogues-of-antimycin-a
#3
Yanmin Zhang, Arnaud Chevalier, Omar M Khdour, Larisa Morales Soto, Sidney M Hecht
In a recent study, several new derivatives of antimycin A (AMA) were produced by means of a novel transacylation reaction, and these were shown to mediate selective toxicity toward cultured A549 human lung epithelial adenocarcinoma cells, as compared with WI-38 normal human lung fibroblasts. The purpose of our study was to investigate whether the analogues all expressed their cytotoxicity by the same mechanism. This was done by studying the effects of the compounds in several types of cell lines. In comparison with 2-O-methylantimycin, which acts at the locus of Bcl-2, none of the new derivatives exhibited a difference in cytotoxicity toward cells expressing different levels of Bcl-2...
June 8, 2017: Planta Medica
https://www.readbyqxmd.com/read/28575911/rapid-transient-production-of-a-monoclonal-antibody-neutralizing-the-porcine-epidemic-diarrhea-virus-pedv-in-nicotiana-benthamiana-and-lactuca-sativa
#4
Kaewta Rattanapisit, Anchalee Srijangwad, Taksina Chuanasa, Suchada Sukrong, Angkana Tantituvanont, Hugh S Mason, Dachrit Nilubol, Waranyoo Phoolcharoen
Porcine epidemic diarrhea virus (PEDV) causes acute diarrhea, vomiting, dehydration, weight loss, and high mortality rate in neonatal piglets. Porcine epidemic diarrhea (PED) has been reported in Europe, America, and Asia including Thailand. The disease causes substantial losses to the swine industry in many countries. Presently, there is no effective PEDV vaccine available. In this study, we developed a plant-produced monoclonal antibody (mAb) 2C10 as a prophylactic candidate to prevent the PEDV infection...
June 2, 2017: Planta Medica
https://www.readbyqxmd.com/read/28571080/bioactive-bafilomycins-and-a-new-n-arylpyrazinone-derivative-from-marine-derived-streptomyces-sp-hzp-2216e
#5
Zhizhen Zhang, Lu Chen, Xiufang Zhang, Ying Liang, Komal Anjum, Lei Chen, Xiao-Yuan Lian
A MeOH extract prepared from culture of an actinomycete Streptomyces sp. HZP-2216E isolated from marine green algae Ulva pertusa was found to significantly inhibit proliferation of human glioma cells. Two different media were applied to culture this marine actinomycete, which produced two new compounds of 23-O-butyrylbafilomycin D and streptoarylpyrazinone A, together with known bafilomycin D, 9-hydroxybafilomycin D, and bafilomycin A1. Structures of new compounds were determined by extensive NMR spectroscopic analyses and HRESIMS data...
June 1, 2017: Planta Medica
https://www.readbyqxmd.com/read/28561205/treatment-with-mountain-cultivated-ginseng-alleviates-trimethyltin-induced-cognitive-impairments-in-mice-via-il-6-dependent-jak2-stat3-erk-signaling
#6
Thu-Hien Thi Tu, Naveen Sharma, Eun-Joo Shin, Hai-Quyen Tran, Yu Jeung Lee, Seung-Yeol Nah, Hoang-Yen Phi Tran, Ji Hoon Jeong, Jung Hwan Jeong, Sung Kwon Ko, Jae Kyung Byun, Hyoung-Chun Kim
Panax ginseng is the most widely used herbal medicine for improving cognitive functions. The pharmacological activity and underlying mechanisms of mountain-cultivated ginseng, however, have yet to be clearly elucidated, in particular, against trimethyltin-induced cognitive dysfunction. We previously reported that interleukin-6 plays a protective role against trimethyltin-induced cognitive dysfunction. Because of this, we have implemented a study system that uses interleukin-6 null (-/-) and wild-type mice. Interestingly, mountain-cultivated ginseng significantly upregulated interleukin-6 expression...
May 30, 2017: Planta Medica
https://www.readbyqxmd.com/read/28561204/oral-administration-of-s-allyl-l-cysteine-and-aged-garlic-extract-to-rats-determination-of-metabolites-and-their-pharmacokinetics
#7
Taehoon Park, Ju-Hee Oh, Joo Hyun Lee, Sang Cheol Park, Young Pyo Jang, Young-Joo Lee
(S)-Allyl-l-cysteine is the major bioactive compound in garlic. (S)-Allyl-l-cysteine is metabolized to (S)-allyl-l-cysteine sulfoxide, N-acetyl-(S)-allyl-l-cysteine, and N-acetyl-(S)-allyl-l-cysteine sulfoxide after oral administration. An accurate LC-MS/MS method was developed and validated for the simultaneous quantification of (S)-allyl-l-cysteine and its metabolites in rat plasma, and the feasibility of using it in pharmacokinetic studies was tested. The analytes were quantified by multiple reaction monitoring using an atmospheric pressure ionization mass spectrometer...
May 30, 2017: Planta Medica
https://www.readbyqxmd.com/read/28561159/new-constituents-from-gymnocarpos-decander
#8
Houria Bechlem, Teresa Mencherini, Mohamed Bouheroum, Samir Benayache, Roberta Cotugno, Alessandra Braca, Nunziatina De Tommasi
The phytochemical investigation of Gymnocarpos decander aerial parts extract afforded two new saponins, 3-O-β-D-glucuronopyranosyl-2β,3β,16α,23-tetrahydroxyolean-12-en-28-O-β-D-apiofuranosyl-(1 → 3)-β-D-xylopyranosyl-(1 → 4)-α-L-rhamnopyranosyl-(1 → 2)-α-L-arabinopyranosyl ester (1), 3-O-β-D-glucuronopyranosyl-2β,3β,16α-trihydroxyolean-12-en-28-O-α-L-rhamnopyranosyl-(1 → 3)-β-D-xylopyranosyl-(1 → 4)-α-L-rhamnopyranosyl-(1 → 2)-α-L-arabinopyranosyl ester (2), and three new flavonol glycosides, isorhamnetin 3-O-2''''-O-acetyl-β-D-xylopyranosyl-(1 → 6)-[β-D-apiofuranosyl-(1 → 2)]-β-D-glucopyranoside (3), isorhamnetin 3-O-2‴-O-acetyl-β-D-xylopyranosyl-(1 → 6)-β-D-glucopyranoside (4), and quercetin 3-O-2‴-O-acetyl-β-D-xylopyranosyl-(1 → 6)-β-D-glucopyranoside (5), together with three known compounds...
May 29, 2017: Planta Medica
https://www.readbyqxmd.com/read/28561136/the-foxgloves-digitalis-revisited
#9
Wolfgang Kreis
This review provides a renewed look at the genus Digitalis. Emphasis will be put on those issues that attracted the most attention or even went through paradigmatic changes since the turn of the millennium. PubMed and Google Scholar were used ("Digitalis" and "Foxglove" were the key words) to identify research from 2000 till 2017 containing data relevant enough to be presented here. Intriguing new results emerged from studies related to the phylogeny and taxonomy of the genus as well as to the biosynthesis and potential medicinal uses of the key active compounds, the cardiac glycosides...
May 23, 2017: Planta Medica
https://www.readbyqxmd.com/read/28521370/salvia-plebeia-extract-inhibits-xanthine-oxidase-activity-in-vitro-and-reduces-serum-uric-acid-in-an-animal-model-of-hyperuricemia
#10
Jin Kyu Kim, Woo Jung Kim, Jung Mi Hyun, Jong Suk Lee, Jin Gwan Kwon, Changon Seo, Myung-Jin Song, Chun Whan Choi, Seong Su Hong, Kyuhee Park, Pansoo Kim, Hachang Sung, Jin Koo Lee, Yongmun Choi
Hyperuricemia is a clinical condition characterized by an elevated level of serum uric acid and is a key risk factor for the development of gout and metabolic disorders. The existing urate-lowering therapies are often impractical for certain patient populations, providing a rationale to explore new agents with improved safety and efficacy. Here, we discovered that Salvia plebeia extract inhibited the enzyme activity of xanthine oxidase, which is a key enzyme generating uric acid in the liver. In an animal model of hyperuricemia, S...
May 18, 2017: Planta Medica
https://www.readbyqxmd.com/read/28511229/hplc-based-activity-profiling-for-gabaa-receptor-modulators-in-searsia-pyroides-using-a-larval-zebrafish-locomotor-assay
#11
Fahimeh Moradi-Afrapoli, Hannes van der Merwe, Maria De Mieri, Anke Wilhelm, Marco Stadler, Pieter C Zietsman, Steffen Hering, Kenneth Swart, Matthias Hamburger
A dichloromethane extract from leaves of Searsia pyroides potentiated gamma aminobutyric acid-induced chloride currents by 171.8 ± 54% when tested at 100 µg/mL in Xenopus oocytes transiently expressing gamma aminobutyric acid type A receptors composed of α1β2γ2s subunits. In zebrafish larvae, the extract significantly lowered pentylenetetrazol-provoked locomotion when tested at 4 µg/mL. Active compounds of the extract were tracked with the aid of HPLC-based activity profiling utilizing a previously validated zebrafish larval locomotor activity assay...
May 16, 2017: Planta Medica
https://www.readbyqxmd.com/read/28499305/aristolic-acid-derivatives-from-the-bark-of-antidesma-ghaesembilla
#12
Sibylle Schäfer, Stefan Schwaiger, Hermann Stuppner
Antidesma ghaesembilla is an important medicinal and food plant in many Asian countries. Ten substances could be isolated from the dichloromethane and methanol extract: sitostenone (3), daucosterol (4), chavibetol (5), asperphenamate (6), protocatechuic acid (7), vanillic acid-4-O-β-D-glucoside (8), 1-O-β-D-glucopyranosyl-3-O-methyl-phloroglucinol (9), and aristolic acid II-8-O-β-D-glucoside (10), and two new aristolic acid derivatives, 10-amino-5,7-dimethoxy-aristolic acid II (= 6-amino-9,11-dimethoxyphenanthro[3,4-d]-1,3-dioxole-5-carboxylic acid; 1) and 5,7-dimethoxy-aristolochic acid II (= 9,11-dimethoxy-6-nitrophenantro[3,4-d]-1,3-dioxole-5-carboxylic acid; 2)...
May 12, 2017: Planta Medica
https://www.readbyqxmd.com/read/28499304/isolation-and-structure-characterization-of-cytotoxic-phorbol-esters-from-the-seeds-of-croton-tiglium
#13
Qizhen Du, Yongchun Zhao, Hongchun Liu, Chunping Tang, Minmin Zhang, Changqiang Ke, Yang Ye
Nine new and eleven known phorbol esters were isolated from an acetone extract of the seeds of Croton tiglium. Their structures were determined by extensive analysis of spectroscopic data. Eleven of these compounds were evaluated for their inhibition activity on human tumor cell lines HL-60 and lung carcinoma A549. 12-O-Tiglylphorbol-13-acetate (11), 12-O-(2-methyl)-butyrylphorbol-13-aetate (12), and 12-O-tiglylphorbol-13-isobutyrate (13) exhibited strong inhibition activity against both HL-60 and A549 cell lines with IC50 values ≤ 0...
May 12, 2017: Planta Medica
https://www.readbyqxmd.com/read/28486743/production-of-the-cytotoxic-cardenolide-glucoevatromonoside-by-semisynthesis-and-biotransformation-of-evatromonoside-by-a-digitalis-lanata-cell-culture
#14
Jennifer Munkert, Marina Santiago Franco, Elke Nolte, Izabella Thaís Silva, Rachel Oliveira Castilho, Flaviano Melo Ottoni, Naira F Z Schneider, Mônica C Oliveira, Helge Taubert, Walter Bauer, Saulo F Andrade, Ricardo J Alves, Cláudia M O Simões, Fernão C Braga, Wolfgang Kreis, Rodrigo Maia de Pádua
Recent studies demonstrate that cardiac glycosides, known to inhibit Na(+)/K(+)-ATPase in humans, have increased susceptibility to cancer cells that can be used in tumor therapy. One of the most promising candidates identified so far is glucoevatromonoside, which can be isolated from the endangered species Digitalis mariana ssp. heywoodii. Due to its complex structure, glucoevatromonoside cannot be obtained economically by total chemical synthesis. Here we describe two methods for glucoevatromonoside production, both using evatromonoside obtained by chemical degradation of digitoxin as the precursor...
May 9, 2017: Planta Medica
https://www.readbyqxmd.com/read/28486742/from-pharmacognosia-to-dna-based-medicinal-plant-authentication-pharmacognosy-through-the-centuries
#15
Michael Heinrich, Sabine Anagnostou
For centuries, pharmacognosy was essential for the identification, quality, purity, and, until the end of the 18th century, even for the efficacy of medicinal plants. Since the 19th century, it concentrated on authenticity, purity, quality and the analysis of active substances, and was established as an academic branch discipline within pharmacy and continuously developed into a modern, highly sophisticated science. Even though the paradigm in pharmacy changed in the 19th century with the discovery of morphine and concentrated on single substances that could be synthesized fast by the upcoming industry, medicinal plants always remained an important element of the Materia medica, and during the last decades, medicinal plants continue to be a source of remedies, and natural products are an inspiration for new medicine...
May 9, 2017: Planta Medica
https://www.readbyqxmd.com/read/28476067/erratum-antidiabetic-activities-of-an-lc-ms-fingerprinted-aqueous-extract-of-fagonia-cretica-l-in-preclinical-models
#16
Imran Nazir, Nisar Ur Rahman, Zunaira Alvi, M Hafizur Rahman, Jandirk Sendker, Tao Zhang, Neil Frankish, Helen Sheridan
No abstract text is available yet for this article.
May 5, 2017: Planta Medica
https://www.readbyqxmd.com/read/28472842/diterpene-lipo-alkaloids-with-selective-activities-on-cardiac-k-channels
#17
Tivadar Kiss, Botond Borcsa, Péter Orvos, László Tálosi, Judit Hohmann, Dezső Csupor
Aconitum diterpene alkaloids are known for their remarkable toxicity, which is due to their effect on ion channels. Activation of voltage-gated Na(+) channels is the major cause of their cardiotoxicity, however, influence on K(+) channels may also play a role in the overall effect.Here we report the synthesis of a series of lipo-alkaloids, including four new compounds, based on the 14-benzoylaconine structure, which is the core of a vast number of diterpene alkaloids naturally occurring in Aconitum species...
May 4, 2017: Planta Medica
https://www.readbyqxmd.com/read/28472841/denudatin-a-a-dimeric-acylphloroglucinol-from-hypericum-denudatum-presents-an-antinociceptive-effect-in-mice
#18
Henrique Bridi, Gabriela de Carvalho Meirelles, Sérgio Augusto de Loreto Bordignon, Stela Maris Kuze Rates, Gilsane Lino von Poser
A new dimeric acylphloroglucinol, denudatin A (1), was isolated from the flowering aerials parts of Hypericum denudatum, along with the known phloroglucinols selancin A (2), hyperbrasilol A (3), uliginosin B (4), and isouliginosin B (5). The structure of 1 was elucidated using 1D, 2D NMR, and MS experiments, and by comparison with previously reported data for Hypericum dimeric acylphloroglucinols. Denudatin A (1) and selancin A (2) were administered orally to mice displaying antinociceptive activity in the hot plate test...
May 4, 2017: Planta Medica
https://www.readbyqxmd.com/read/28472840/prediction-of-permeation-and-cellular-transport-of-silybum-marianum-extract-formulated-in-a-nanoemulsion-by-using-pampa-and-caco-2-cell-models
#19
Vieri Piazzini, Chiara Rosseti, Elisabetta Bigagli, Cristina Luceri, Anna Rita Bilia, Maria Camilla Bergonzi
The present study explores the potential of nanoemulsion, a lipid drug delivery system, to improve solubility and oral absorption of Silybum marianum extract. The optimized formulation contained 40 mg/mL of commercial extract (4 % w/w) and it was composed of 2.5 g labrasol (20 %) as the oil phase, 1.5 g cremophor EL as the surfactant, and 1 g labrafil as the cosurfactant (mixture surfactant/cosurfactant, 20 %).The system was characterized by dynamic light scattering, transmission electron microscopy, and HPLC-DAD analyses in order to evaluate size, homogeneity, morphology, and encapsulation efficiency...
May 4, 2017: Planta Medica
https://www.readbyqxmd.com/read/28454190/evaluation-of-the-effect-of-epilobium-angustifolium-aqueous-extract-on-lncap-cell-proliferation-in-in-vitro-and-in-vivo-models
#20
Jakub P Piwowarski, Barbara Bobrowska-Korczak, Iwona Stanisławska, Wojciech Bielecki, Robert Wrzesien, Sebastian Granica, Katarzyna Krupa, Anna K Kiss
Epilobium sp. are commonly used in traditional medicine in the treatment of early stages of benign prostatic hyperplasia and inflammation. It is suggested that a dominating constituent, oenothein B, is responsible for the extracts therapeutic effects. Several bioactivities were established for extracts and oenothein B in various in vitro models, but due to the questionable bioavailability of this dimeric macrocyclic ellagitannin, their significance in the in vivo effects remains unresolved. We have thus focused our attention on a complex comparative investigation of the in vitro and in vivo activities of phytochemically characterized Epilobium angustifolium aqueous extract and oenothein B on prostate cancer cells proliferation...
April 28, 2017: Planta Medica
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