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Pterostilbene

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https://www.readbyqxmd.com/read/28629731/pterostilbene-ameliorates-insulin-sensitivity-glycemic-control-and-oxidative-stress-in-fructose-fed-diabetic-rats
#1
Ramoji Kosuru, Sanjay Singh
AIMS: The present investigation was designed to explore the effectiveness of pterostilbene (PT) on insulin resistance, metabolic syndrome and oxidative stress in fructose-fed insulin resistant rats. MAIN METHODS: Age-matched, male Sprague-Dawley rats (330±30g body weight) were allocated into five groups (n=10). Control (C) group received 65% cornstarch, and the diabetic (D) group received 65% fructose for eight weeks. The third group (D+PT20) received 65% fructose and PT 20mg/kg/day for eight weeks...
June 16, 2017: Life Sciences
https://www.readbyqxmd.com/read/28627722/pterostilbene-inhibits-lipogenic-activity-similar-to-resveratrol-or-caffeine-but-differently-modulates-lipolysis-in-adipocytes
#2
Saioa Gomez-Zorita, Chloé Belles, Anaïs Briot, Alfredo Fernández-Quintela, Maria P Portillo, Christian Carpéné
The anti-obesity effects of resveratrol shown in rodents are not transposed into an efficient therapy of human obesity. Consequently, the search for molecules mimicking or surpassing resveratrol actions is ongoing. The natural phenolic compound pterostilbene exhibits beneficial health effects and has the capacity to limit fat mass in animal models. In this study, we tested whether pterostilbene modulates triacylglycerol accumulation/breakdown. Prolonged exposure to pterostilbene or resveratrol inhibited adipocyte differentiation in 3T3-F442A preadipocytes...
June 19, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28607633/pterostilbene-4-%C3%AE-glucoside-protects-against-dss-induced-colitis-via-induction-of-tristetraprolin
#3
Yingqing Chen, Jeongmin Park, Yeonsoo Joe, Hyeok-Jun Park, Seung-Joo Jekal, Daisuke Sato, Hiroki Hamada, Hun Taeg Chung
Pterostilbene, a dimethyl ester analog of resveratrol, has anti-inflammatory and antioxidative effects and alters cell proliferation. Tristetraprolin (TTP) promotes the degradation of proinflammatory mediators via binding to adenosine and uridine- (AU-) rich elements (ARE) located in the 3'-untranslated regions of mRNAs. Here, we utilized pterostilbene 4'-β-glucoside (4-PG), a compound derived from pterostilbene, to investigate whether it has anti-inflammatory effects on dextran sulfate sodium- (DSS-) induced colitis via TTP enhancement...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28595835/the-effect-of-resveratrol-its-naturally-occurring-derivatives-and-tannic-acid-on-the-induction-of-cell-cycle-arrest-and-apoptosis-in-rat-c6-and-human-t98g-glioma-cell-lines
#4
Małgorzata Zielińska-Przyjemska, Mariusz Kaczmarek, Violetta Krajka-Kuźniak, Michał Łuczak, Wanda Baer-Dubowska
Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a potent chemopreventive and potentially cancer therapeutic agent. Since rapid metabolism limits resveratrol bioavailability, derivatives less prone to metabolic transformation are being sought and tested. We evaluated the effect of resveratrol, and its analogs (pterostilbene and 3,5,4'-trimethoxystilbene) along with tannic acid, on cell cycle and apoptosis in rat C6 and human T98G glioma cells. At concentration ranges both lower and higher than IC50 calculated based on MTT assay, all these polyphenols affected the cell cycle distribution...
June 6, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28570053/correlative-analysis-of-fluorescent-phytoalexins-by-mass-spectrometry-imaging-and-fluorescence-microscopy-in-grapevine-leaves
#5
Loïc Becker, Sébastien Bellow, Vincent Carré, Gwendal Latouche, Anne Poutaraud, Didier Merdinoglu, Spencer C Brown, Zoran G Cerovic, Patrick Chaimbault
Plant response to their environment stresses is a complex mechanism involving secondary metabolites. Stilbene phytoalexins, namely resveratrol, pterostilbene, piceids and viniferins play a key role in grapevine (Vitis vinifera) leaf defense. Despite their well-established qualities, conventional analyses such as HPLC-DAD or LC-MS lose valuable information on metabolite localization during the extraction process. To overcome this issue, a correlative analysis combining mass spectroscopy imaging (MSI) and fluorescence imaging was developed to localize in situ stilbenes on the same stressed grapevine leaves...
June 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28560392/the-blueberry-component-pterostilbene-has-potent-anti-myeloma-activity-in-bortezomib-resistant-cells
#6
Gege Chen, Zhijian Xu, Gaomei Chang, Jun Hou, Liangning Hu, Yiwen Zhang, Dandan Yu, Bo Li, Shuaikang Chang, Yongsheng Xie, Yong Zhang, Rong Wei, Huiqun Wu, Wenqin Xiao, Xi Sun, Yi Tao, Lu Gao, Bojie Dai, Jumei Shi, Weiliang Zhu
Multiple myeloma (MM) is an incurable hematologic malignancy because of its drug resistance. Pterostilbene (Pter) is found mainly in blueberries and grapes. The effects of Pter and its exact pharmacologic mechanisms on chemoresistant myeloma are not known. Herein, we investigated the anti-myeloma activity of Pter in bortezomib-resistant cell line H929R and explored the related mechanism of action for the first time. We found that Pter inhibited proliferation of H929R cells and promoted apoptosis of the cells through a caspase-dependent pathway, loss of mitochondrial membrane potential, and activation of Akt and p38 mitogen-activated protein kinase (MAPK) signaling pathways...
May 30, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28552912/pterostilbene-suppresses-human-endometrial-cancer-cells-in-vitro-by-down-regulating-mir-663b
#7
Ya-Ling Wang, Yuan Shen, Jian-Ping Xu, Kun Han, Yan Zhou, Su Yang, Jun-Yi Yin, Da-Liu Min, Hai-Yan Hu
Resveratrol has long been known as an antioxidant and a chemopreventive agent. Similar to resveratrol, pterostilbene (PT) is also a phenolic compound extracted from the Vitis species. However, there are few studies on the antitumor effect of PT. Thus, we investigated the effects of PT on the endometrial cancer (EC) cells in vitro and the related molecular mechanisms. Treatment of EC cell lines HTB-111 and Ishikawa with PT (25-100 μmol/L) dose-dependently suppressed the cell viability and induced apoptosis...
May 29, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28550734/pterostilbene-alleviates-polymicrobial-sepsis-induced-liver-injury-possible-role-of-sirt1-signaling
#8
Xiaojing Liu, Xueliang Yang, Lingna Han, Feng Ye, Min Liu, Wanhu Fan, Kai Zhang, Ying Kong, Jian Zhang, Lei Shi, Yunru Chen, Xi Zhang, Shumei Lin
Liver injury occurs frequently during sepsis. Pterostilbene (Pte), a natural dimethylated analog of resveratrol from blueberries, exerts anti-inflammatory and anti-apoptotic effects in various diseases. However, the role of Pte in sepsis-induced liver injury and its underlying mechanisms remain unknown. The current study aimed to evaluate the protective effects of Pte on sepsis-induced liver injury and its potential mechanisms. Sepsis was induced using cecal ligation and puncture (CLP) in C57BL/6 mice. Mice were administered Pte (5, 10, 15mg/kg, i...
May 24, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28532341/pterostilbene-protects-against-uvb-induced-photo-damage-through-a-phosphatidylinositol-3-kinase-dependent-nrf2-are-pathway-in-human-keratinocytes
#9
Huaping Li, Na Jiang, Bihua Liang, Qing Liu, Erting Zhang, Liqian Peng, Huiyan Deng, Runxiang Li, Zhenjie Li, Huilan Zhu
OBJECTIVE: Ultraviolet B (UVB) irradiation is the initial etiological factor for various skin disorders, including erythema, sunburn, photoaging, and photocarcinogenesis. Pterostilbene (Pter) displayed remarkable antioxidant, anti-inflammatory, and anticarcinogenic activities. This study aimed to investigate the effective mechanism of Pter against UVB-induced photodamage in immortalized human keratinocytes. METHODS: Human keratinocytes were pretreated with Pter (5 and 10 μM) for 24 h prior to UVB irradiation (300 mJ/cm(2))...
May 22, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28433778/novel-lipid-mimetic-prodrugs-delivering-active-compounds-to-adipose-tissue
#10
Andrea Mattarei, Andrea Rossa, Veronica Bombardelli, Michele Azzolini, Martina La Spina, Cristina Paradisi, Mario Zoratti, Lucia Biasutto
Obesity and associated pathologies are a dramatically growing problem. New therapies to prevent and/or cure them are strongly needed. Adipose tissue is a logical target for pharmacological intervention, since it is now recognized to exert an important endocrine function, secreting a variety of adipokines affecting, for example, adiposity and insulin resistance. This proof of principle work focuses on the development of novel lipid-mimetic prodrugs reaching fat deposits by the same lymphatic absorption route followed by dietary triglycerides...
April 13, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28415020/simultaneous-determination-of-ten-bioactive-constituents-of-sanjie-zhentong-capsule-in-rat-plasma-by-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry-and-its-application-to-a-pharmacokinetic-study
#11
Jiachun Li, Dongpo Li, Youzhi Pan, Jun-Hua Hu, Wenzhe Huang, Zhen-Zhong Wang, Wei Xiao, Yu Wang
Sanjie Zhentong capsule, a well-known traditional Chinese medicine prescription, are used for the treatment of endometriosis-related diseases. In this study, a simple, rapid and sensitive ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method was developed for the simultaneous determination of ten bioactive constituents, including peimine, peiminine, peimisine, loureirin A, loureirin B, 7,4'-dihydroxyflavone, pterostilbene, ginsenoside Rg1, ginsenoside Rb1, and notoginsenoside R1 in rat plasma after oral administration of Sanjie Zhentong capsule...
June 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28410217/pterostilbene-inhibits-inflammation-and-ros-production-in-chondrocytes-by-activating-nrf2-pathway
#12
En-Xing Xue, Jian-Ping Lin, Yu Zhang, Sun-Ren Sheng, Hai-Xiao Liu, Yu-Long Zhou, Hui Xu
Pterostilbene has been reported as a potential drug to inhibit oxidative stress and inflammation. However, the effect of pterostilbene on chondrocytes and osteoarthritis remains to be elucidated. We sought to investigate whether pterostilbene could protect chondrocytes from inflammation and ROS production through factor erythroid 2-related factor 2 (Nrf2) activation. The pterostilbene toxicity on chondrocytes collected from cartilages of Sprague-Dawley rats was assessed by CCK-8 test. Immunofluorescence and Western blotting explored the nuclear translocation of Nrf2...
March 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28375488/a-combination-of-pterostilbene-with-autophagy-inhibitors-exerts-efficient-apoptotic-characteristics-in-both-chemosensitive-and-chemoresistant-lung-cancer-cells
#13
Ming-Ju Hsieh, Chiao-Wen Lin, Shun-Fa Yang, Gwo-Tarng Sheu, Ya-Yen Yu, Mu-Kuan Chen, Hui-Ling Chiou
No abstract text is available yet for this article.
April 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28345676/bioconversion-of-stilbenes-in-genetically-engineered-root-and-cell-cultures-of-tobacco
#14
Diego Hidalgo, Ascensión Martínez-Márquez, Elisabeth Moyano, Roque Bru-Martínez, Purificación Corchete, Javier Palazon
It is currently possible to transfer a biosynthetic pathway from a plant to another organism. This system has been exploited to transfer the metabolic richness of certain plant species to other plants or even to more simple metabolic organisms such as yeast or bacteria for the production of high added value plant compounds. Another application is to bioconvert substrates into scarcer or biologically more interesting compounds, such as piceatannol and pterostilbene. These two resveratrol-derived stilbenes, which have very promising pharmacological activities, are found in plants only in small amounts...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28343084/role-of-pterostilbene-in-attenuating-immune-mediated-devastation-of-pancreatic-beta-cells-via-nrf2-signaling-cascade
#15
Dornadula Sireesh, Munuswamy-Ramanujam Ganesh, Umapathy Dhamodharan, Murugesan Sakthivadivel, Srinivasan Sivasubramanian, Palani Gunasekaran, Kunka Mohanram Ramkumar
Nrf2 (nuclear factor erythroid 2-related factor-2) is a transcription factor that regulates oxidative/xenobiotic stress response and also suppress inflammation. Nrf2 signaling is associated with an increased susceptibility to various kinds of stress. Nrf2 has been shown as a promising therapeutic target in various human diseases including diabetes. Our earlier studies showed Pterostilbene (PTS) as a potent Nrf2 activator, and it protects the pancreatic β-cells against oxidative stress. In this study, we investigated PTS confer protection against cytokine-induced β-cell apoptosis and its role on insulin secretion in streptozotocin (STZ)-induced diabetic mice...
June 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28332842/generation-of-antifungal-stilbenes-using-the-enzymatic-secretome-of-botrytis-cinerea
#16
Katia Gindro, Sylvain Schnee, Davide Righi, Laurence Marcourt, Samad Nejad Ebrahimi, Josep Massana Codina, Francine Voinesco, Emilie Michellod, Jean-Luc Wolfender, Emerson Ferreira Queiroz
The protein secretome of Botrytis cinerea was used to perform the biotransformation of resveratrol, pterostilbene, and a mixture of both. Metabolite profiling by UHPLC-HRMS revealed the presence of compounds with unusual molecular formula, suggesting the existence of new products. To isolate these products, the reactions were scaled-up, and 21 analogues were isolated and fully characterized by NMR and HRESIMS analyses. The reaction with pterostilbene afforded five new compounds, while the reaction with a mixture of pterostilbene and resveratrol afforded seven unusual stilbene dimers...
March 23, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28327179/pterostilbene-prevents-akt-erk-axis-mediated-polymerization-of-surface-fibronectin-on-suspended-lung-cancer-cells-independently-of-apoptosis-and-suppresses-metastasis
#17
Ying-Jan Wang, Jing-Fang Lin, Li-Hsin Cheng, Wen-Tsan Chang, Ying-Hsien Kao, Ming-Min Chang, Bour-Jr Wang, Hung-Chi Cheng
BACKGROUND: Polymeric fibronectin (polyFN) assembled on suspended breast cancer cells is required for metastasis. Conceivably, drugs that target such polyFN may fight against cancer metastasis. While stilbene analogs trigger pro-apoptotic effect on attached cancer cells, whether they prevent polyFN assembly and metastasis of suspended cancer cells via an apoptosis-independent manner remains unexplored. METHODS: We depleted suspended Lewis lung carcinoma (LLC) cells of polyFN by silencing the endogenous FN expression or pterostilbene (PS) to examine whether metastasis of lung cancer cells could thus be suppressed...
March 21, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28319852/pterostilbene-a-dimethylated-analog-of-resveratrol-promotes-energy-metabolism-in-obese-rats
#18
Koji Nagao, Tomoyuki Jinnouchi, Shunichi Kai, Teruyoshi Yanagita
Pterostilbene (trans-3,5-dimethoxy-4-hydroxystilbene) is a dimethylated analog of resveratrol and has been reported to exert various pharmacological effects. In this study, we evaluated the effect of pterostilbene on the pathogenesis of obesity and energy metabolism in obese rats. Pterostilbene significantly activates silent mating type information regulation 2 homolog-1 and peroxisome proliferator-activated receptor-alpha in vitro. At 4 weeks a 0.5% pterostilbene diet markedly suppressed the abdominal white adipose tissue (WAT) accumulation in obese rats...
May 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28315700/exploiting-the-aglycon-promiscuity-of-glycosyltransferase-bs-yjic-from-bacillus-subtilis-and-its-application-in-synthesis-of-glycosides
#19
Longhai Dai, Jiao Li, Peiyuan Yao, Yueming Zhu, Yan Men, Yan Zeng, Jiangang Yang, Yuanxia Sun
Glycosylation is a prominent biological mechanism for structural and functional diversity of natural products. Uridine diphosphate-dependent glycosyltransferases with aglycon promiscuity are generally recognised as effective biocatalysts for glycodiversification of natural products for practical applications. In this study, the aglycon promiscuity of glycosyltransferase Bs-YjiC from Bacillus subtilis 168 was explored. Bs-YjiC, with uridine diphosphate glucose (UDPG) as sugar donor, exhibited robust capabilities to glycosylate 19 structurally diverse types of drug-like scaffolds with regio- and stereospecificities and form O-, N- and S-linkage glycosides...
March 16, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28304328/bactericidal-effect-of-pterostilbene-alone-and-in-combination-with-gentamicin-against-human-pathogenic-bacteria
#20
Wee Xian Lee, Dayang Fredalina Basri, Ahmad Rohi Ghazali
The antibacterial activity of pterostilbene in combination with gentamicin against six strains of Gram-positive and Gram-negative bacteria were investigated. The minimum inhibitory concentration and minimum bactericidal concentration of pterostilbene were determined using microdilution technique whereas the synergistic antibacterial activities of pterostilbene in combination with gentamicin were assessed using checkerboard assay and time-kill kinetic study. Results of the present study showed that the combination effects of pterostilbene with gentamicin were synergistic (FIC index < 0...
March 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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