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Planta Medica

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https://www.readbyqxmd.com/read/28219095/kaempferol-attenuates-cardiac-hypertrophy-via-regulation-of-ask1-mapk-signaling-pathway-and-oxidative-stress
#1
Hong Feng, Jianlei Cao, Guangyu Zhang, Yanggan Wang
Kaempferol has been demonstrated to provide benefits for the treatment of atherosclerosis, coronary heart disease, hyperlipidemia, and diabetes through its antioxidant and anti-inflammatory properties. However, its role in cardiac hypertrophy remains to be elucidated. The aim of our study was to investigate the effects of kaempferol on cardiac hypertrophy and the underlying mechanism. Mice subjected to aorta banding were treated with or without kaempferol (100 mg/kg/d, p. o.) for 6 weeks. Echocardiography was performed to evaluate cardiac function...
February 20, 2017: Planta Medica
https://www.readbyqxmd.com/read/28196382/bromelain-loading-and-release-from-a-hydrogel-formulated-using-alginate-and-arabic-gum
#2
Janaína Artem Ataide, Letícia Caramori Cefali, Marcia de Araujo Rebelo, Lívia Genovez Spir, Elias Basile Tambourgi, Angela Faustino Jozala, Marco Vinícius Chaud, Edgar Silveira, Xiaochen Gu, Priscila Gava Mazzola
An ideal wound dressing ensures a moist environment around the wound area and absorbs exudates from the wound surface. Topical application of bromelain to incised wounds has been shown to reprogram the wound microenvironment to promote effective tissue repair. Combining the characteristics of hydrogels and bromelain is therefore of great interest. Herein, we describe the development of a hydrogel, formulated using alginate and Arabic gum, for bromelain loading and release. The hydrogel formulation was evaluated using response surface methodology, considering the pH value and the concentration of alginate and Arabic gum...
February 14, 2017: Planta Medica
https://www.readbyqxmd.com/read/28192813/passive-intestinal-absorption-of-representative-plant-secondary-metabolites-a-physicochemical-study
#3
Charlotte Petit, Martina Ceccarelli, Sylvian Cretton, Joëlle Houriet, Krystyna Skalicka-Woźniak, Philippe Christen, Pierre-Alain Carrupt, Laura Goracci, Jean-Luc Wolfender
Natural products are generally ingested as part of traditional herbal decoctions or in the current diet. However, in natural product research, the bioavailability of secondary metabolites is often poorly investigated. In this work, a systematic study was carried out in order to highlight the physicochemical parameters that mainly influence the passive intestinal absorption of natural products. For this, a representative set of natural products including alkaloids, coumarins, flavonoid aglycones and glycosides, and carboxylic acids was selected and their physicochemical properties were predicted using relevant Volsurf+ descriptors...
February 13, 2017: Planta Medica
https://www.readbyqxmd.com/read/28187468/development-of-an-enzyme-linked-immunosorbent-assay-for-determination-of-miroestrol-using-an-anti-miroestrol-monoclonal-antibody
#4
Tharita Kitisripanya, Supaluk Krittanai, Orapin Udomsin, Kamonthip Jutathis, Jukrapun Komaikul, Thaweesak Juengwatanatrakul, Seiichi Sakamoto, Hiroyuki Tanaka, Satoshi Morimoto, Waraporn Putalun
Miroestrol is a chromene with potent estrogenic activity present in Pueraria candollei, commonly known as White Kwao Krua. Although this compound is only present in low amounts in the plant, it plays an important role in the estrogenic action of P. candollei products. As a tool for further studies about the efficacy and safety of P. candollei as a phytoestrogenic supplement, we generated a novel monoclonal antibody against miroestrol. This anti-miroestrol monoclonal antibody was used to develop an immunoassay for the determination of miroestrol content, which can be used for quality control purposes of P...
February 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28187467/protective-effects-of-ellagic-acid-on-cardiovascular-injuries-caused-by-hypertension-in-rats
#5
Juliana Bahia Reis Jordão, Hellen Karine Paes Porto, Flávio Marques Lopes, Aline Carvalho Batista, Matheus Lavorenti Rocha
Ellagic acid is described as having antioxidant and antiproliferative properties. Hence, it was hypothesized that ellagic acid could improve cardiovascular damage caused by hypertension. In this work, hypertension was induced in rats with Nω-Nitro-L-arginine methyl ester hydrochloride (60 mg/kg/day in drinking water) for 6 weeks. Ellagic acid was coadministered (10 or 30 mg/kg/day by gavage) between the second and sixth week. Blood pressure was recorded every week by tail-cuff plethysmography. After 6 weeks, the rats were sacrificed, the hearts and kidneys were weighed, and blood was collected...
February 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28187466/effects-of-mangifera-indica-careless-on-microcirculation-and-glucose-metabolism-in-healthy-volunteers
#6
Sybille Buchwald-Werner, Christiane Schön, Sonja Frank, Claudia Reule
A commercial Mangifera indica fruit powder (Careless) showed beneficial acute effects on microcirculation in a randomized, double-blind, crossover pilot study. Here, long-term effects on microcirculation and glucose metabolism were investigated in a double-blind, randomized, placebo-controlled, 3-arm parallel-design study in healthy individuals. A daily dose of 100 mg or 300 mg of the fruit powder was compared to placebo after supplementation for 4 weeks. Microcirculation and endothelial function were assessed by the Oxygen-to-see System and pulse amplitude tonometry, respectively...
February 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28178749/improving-on-nature-the-role-of-nanomedicine-in-the-development-of-clinical-natural-drugs
#7
Anna Rita Bilia, Vieri Piazzini, Clizia Guccione, Laura Risaliti, Martina Asprea, Giada Capecchi, Maria Camilla Bergonzi
Natural products have been used as a major source of drugs for millennia, and about half of the pharmaceuticals in use today are derived from natural products. However, their efficacy can be limited because of their low hydrophilicity and intrinsic dissolution rate(s), or physical/chemical instability. In addition, they can present scarce absorption, poor pharmacokinetics and bioavailability, scarce biodistribution, first-pass metabolism, trivial penetration and accumulation in the organs of the body, or low targeting efficacy...
February 8, 2017: Planta Medica
https://www.readbyqxmd.com/read/28158891/four-new-xanthones-from-cratoxylum-cochinchinense-and-their-in-vitro-antiproliferative-effects
#8
Chihiro Ito, Takuya Matsui, Ai Niimi, Hugh T-W Tan, Masataka Itoigawa
The study of the chemical constituents of branches and twigs of Cratoxylum cochinchinense collected in Singapore led to the isolation and structural elucidation of four new xanthones, named cratoxanthone A (1), B (2), C (3), and D (4), together with six known xanthones (5-10) and one known dihydroanthracenone (11). Eight xanthones (including 1 and 2) and 11 were tested for their antiproliferative activity in three human carcinoma cell lines (lung adenocarcinoma A549, colorectal carcinoma Colo205, and epidermoid carcinoma KB) and a human acute lymphoblastic leukemia B cell line (NALM-6), and the mitochondrial membrane potential was determined in KB cells...
February 3, 2017: Planta Medica
https://www.readbyqxmd.com/read/28152554/in-vitro-and-in-vivo-study-of-the-gastrointestinal-absorption-and-metabolisation-of-hymenocardine-a-cyclopeptide-alkaloid
#9
Emmy Tuenter, Sebastiaan Bijttebier, Kenn Foubert, Annelies Breynaert, Sandra Apers, Nina Hermans, Luc Pieters
Hymenocardine is a cyclopeptide alkaloid present in the root bark of Hymenocardia acida. In traditional African medicine, the leaves and roots of this plant are used to treat malaria, and moderate in vitro antiplasmodial activity has been reported for hymenocardine. However, in view of its peptide-like nature, potential metabolisation after oral ingestion has to be taken into account when considering in vivo experiments. In this study, the stability and small intestinal absorption of hymenocardine was assessed using an in vitro gastrointestinal dialysis model...
February 2, 2017: Planta Medica
https://www.readbyqxmd.com/read/28135738/in-vitro-and-in-vivo-anti-inflammatory-effects-of-struthanthus-vulgaris
#10
Franciane Martins Marques, Maycow Rodrigues da Costa, Cátia Vittorazzi, Luciane De Souza Dos Santos Gramma, Thiago Barth, Tadeu Uggere de Andrade, Denise Coutinho Endringer, Rodrigo Scherer, Marcio Fronza
Struthanthus vulgaris is probably the most common medicinal mistletoe plant in Brazil, and has been used in folk medicine as an anti-inflammatory agent and for cleaning skin wounds. Our proposal was to evaluate the anti-inflammatory activity of S. vulgaris ethanol leaf extract and provide further insights of how this biological action could be explained using in vitro and in vivo assays. In vitro anti-inflammatory activity was preliminarily investigated in lipopolysaccharide/interferon gamma-stimulated macrophages based on their ability to inhibit nitric oxide production and tumor necrosis factor-alpha...
January 30, 2017: Planta Medica
https://www.readbyqxmd.com/read/28118673/an-appraisal-of-drug-drug-interactions-with-green-tea-camellia-sinensis
#11
Ahmed A Albassam, John S Markowitz
This review summarizes published in vitro, animal, and clinical studies investigating the effects of green tea (Camellia sinensis) extract and associated catechins on drug-metabolizing enzymes and drug transporters. In vitro studies suggest that green tea extract and its main catechin, (-)-epigallocatechin-3-gallate, to varying degrees, inhibit the activity of CYP1A1, CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2D6, and CYP3A4. UGT1A1 and UGT1A4 isoforms were also inhibited by (-)-epigallocatechin-3-gallate. Animal studies suggest green tea extract and/or (-)-epigallocatechin-3-gallate significantly increase the bioavailability of diltazem, verapamil, tamoxifen simvastatin, 5-fluorouracil, and nicardipine...
January 24, 2017: Planta Medica
https://www.readbyqxmd.com/read/28095587/quantitative-determination-of-lactones-in-piper-methysticum-kava-kava-by-supercritical-fluid-chromatography
#12
Adele Murauer, Markus Ganzera
A fast and validated supercritical fluid chromatography method for the quantitative determination of major lactones in Piper methysticum, a plant used against nervous anxiety, stress, and restlessness, was developed. The baseline separation of dihydrokavain, demethoxyyangonin, kavain, yangonin, dihydromethysticin, and methysticin was possible in less than 4 min on an Aquity UPC(2) BEH 1.7 µm column, in combination with a mobile phase comprising CO2 and methanol with diethylamine. The column temperature had a great impact on the results because only at 70 °C could kavain and yangonin be fully resolved...
January 17, 2017: Planta Medica
https://www.readbyqxmd.com/read/28095586/antichlamydial-dimeric-indole-derivatives-from-marine-actinomycete-rubrobacter-radiotolerans
#13
Jian Lin Li, Dandan Chen, Lei Huang, Min Ni, Yu Zhao, Huizhou Fan, Xiaofeng Bao
Chlamydiae are widely distributed pathogens of human populations, which can lead to serious reproductive and other health problems. In our search for novel antichlamydial metabolites from marine derived-microorganisms, one new (1) and two known (2, 3) dimeric indole derivatives were isolated from the sponge-derived actinomycete Rubrobacter radiotolerans. The chemical structures of these metabolites were elucidated by NMR spectroscopic data as well as CD calculations. All three metabolites suppressed chlamydial growth in a concentration-dependent manner...
January 17, 2017: Planta Medica
https://www.readbyqxmd.com/read/28081580/biosynthetic-studies-on-acetosellin-and-structure-elucidation-of-a-new-acetosellin-derivative
#14
Peter Hufendiek, Simon Stephan Martin Stölben, Stefan Kehraus, Nicole Merten, Henrik Harms, Max Crüsemann, Idris Arslan, Michael Gütschow, Tanja Schneider, Gabriele Maria König
Natural products from fungi, especially Ascomycota, play a major role in therapy and drug discovery. Fungal strains originating from marine habitats offer a new avenue for finding unusual molecular skeletons. Here, the marine-derived fungus Epicoccum nigrum (strain 749) was found to produce the azaphilonoid compounds acetosellin and 5',6'-dihydroxyacetosellin. The latter is a new natural product. The biosynthesis of these polyketide-type compounds is intriguing, since two polyketide chains are assembled to the final product...
January 12, 2017: Planta Medica
https://www.readbyqxmd.com/read/28073120/nano-pelargonidin-protects-hyperglycemic-induced-l6-cells-against-mitochondrial-dysfunction
#15
Asmita Samadder, Debojyoti Tarafdar, Suresh K Abraham, Kumaresh Ghosh, Anisur Rahman Khuda-Bukhsh
Nano-encapsulation of several natural products has become an important tool in enhancing the bioavailability of some modern drugs against many diseases. Pelargonidin is an anthocyanidin found in many fruits and vegetables. Pelargonidin is loaded with poly-lactide-co-glycolic-acid, a non-toxic biodegradable polymer, to produce nano-pelargonidin. Size, morphology, zeta potential, and planar uniformity of formulated nano-pelargonidin were determined by atomic force microscopy and dynamic light scattering. The time required for cellular entry, folds of nano-pelargonidin, and drug encapsulation efficiency of poly-lactide-co-glycolic-acid were also ascertained...
January 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28073119/in-vitro-inhibition-of-human-cyp450s-1a2-2c9-3a4-5-2d6-and-2e1-by-grandisin
#16
Maísa Daniela Habenschus, Fernanda de Lima Moreira, Norberto Peporine Lopes, Anderson R M de Oliveira
Grandisin, a lignan isolated from many species of plants, such as Virola surinamensis, is a potential drug candidate due to its biological properties, highlighted by its antitumor and trypanocidal activities. In this study, the inhibitory effects of grandisin on the activities of human cytochrome P450 enzymes were investigated by using human liver microsomes. Results showed that grandisin is a competitive inhibitor of CYP2C9 and a competitive and mechanism-based inhibitor of CYP3A4/5. The apparent Ki value for CYP2C9 was 50...
January 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28073118/in-vitro-metabolism-of-artepillin-c-by-rat-and-human-liver-microsomes
#17
Daniel Blascke Carrão, Nayara Cristina Perez de Albuquerque, Lucas Maciel Mauriz Marques, Antônio Eduardo Miller Crotti, Alan Cesar Pilon, Vanderlan Da Silva Bolzani, Andresa Aparecida Berretta, Anderson Rodrigo Moraes de Oliveira
Artepillin C, a natural product present in the Brazilian green propolis, has several biological properties. Among these properties, the antitumor action of this product is noteworthy and makes it a promising drug candidate for the treatment of several types of cancer. This paper describes the in vitro metabolism of Artepillin C in rat and human liver microsomes. The rat model suggested a sigmoidal profile for the metabolism, adapted to the Hill's kinetic model. The enzymatic kinetic parameters were as follows: maximal velocity = 0...
January 10, 2017: Planta Medica
https://www.readbyqxmd.com/read/28068726/erratum-naphthoquinones-from-onosma-paniculatum-with-potential-anti-inflammatory-activity
#18
Miao Dong, Dan Liu, Yan-Hong Li, Xuan-Qin Chen, Kai Luo, Yong-Min Zhang, Rong-Tao Li
No abstract text is available yet for this article.
January 9, 2017: Planta Medica
https://www.readbyqxmd.com/read/28010025/evodiamine-prevents-isoproterenol-induced-cardiac-fibrosis-by-regulating-endothelial-to-mesenchymal-transition
#19
Xiao-Han Jiang, Qing-Qing Wu, Yang Xiao, Yuan Yuan, Zheng Yang, Zhou-Yan Bian, Wei Chang, Qi-Zhu Tang
Evodiamine, a major component of Evodia rutaecarpa, can protect the myocardium against injury induced by atherosclerosis and ischemia-reperfusion. However, the effect of evodiamine against cardiac fibrosis remains unclear. This study aims to investigate the possible effect and mechanism involved in the function of evodiamine on isoproterenol-induced cardiac fibrosis and endothelial-to-mesenchymal transition. Isoproterenol was used to induce cardiac fibrosis in mice, and evodiamine was gavaged simultaneously...
December 23, 2016: Planta Medica
https://www.readbyqxmd.com/read/28006833/triterpenoids-with-antiplatelet-aggregation-activity-from-the-roots-of-ilex-pubescens
#20
Qinglong Tan, Maosong Qiu, Di Cao, Tianqin Xiong, Lei Zhang, Lian Zhou, Li Rong, Jinsong Zhou, Jing Jin, Zhongxiang Zhao
Two new triterpenes and five new triterpene saponins, named ilexpusons A-G (1-7), as well as eight known compounds were isolated from Ilex pubescens. The structures of the new compounds were established by a combination of chemical and spectroscopic methods, including HRESIMS, (1)H-NMR, (13)C-NMR, (1)H-(1)H COSY, HSQC, HMBC, and NOESY. Additionally, the biological activity of compounds 1 - 15 against adenosine diphosphate-induced platelet aggregation in rabbit plasma was determined. Among the tested compounds, 1, 2, 5, 6, 8, 13, 14, and 15 exhibited significant inhibition of platelet aggregation in vitro...
December 22, 2016: Planta Medica
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