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Leonardo Bocchi, Monia Savi, Valeria Naponelli, Rocchina Vilella, Gianluca Sgarbi, Alessandra Baracca, Giancarlo Solaini, Saverio Bettuzzi, Federica Rizzi, Donatella Stilli
BACKGROUND/AIMS: Dietary polyphenols from green tea have been shown to possess cardio-protective activities in different experimental models of heart diseases and age-related ventricular dysfunction. The present study was aimed at evaluating whether long term in vivo administration of green tea extracts (GTE), can exert positive effects on the normal heart, with focus on the underlying mechanisms. METHODS: The study population consisted of 20 male adult Wistar rats...
June 15, 2018: Cellular Physiology and Biochemistry
Abdelmeniem El-Bakoush, Olumayokun A Olajide
Formononetin is a bioactive non-steroidal polyphenol found in a variety of plants. In this study we evaluated the effects of formononetin on neuroinflammation in LPS-stimulated BV2 microglia. Results showed that formononetin significantly reduced the production of TNF-α, IL-6 and IL-1β, nitrite and PGE2 , as well as protein levels of iNOS and COX-2. Reporter gene assays showed that formononetin produced inhibition of NF-κB luciferase activity in HEK293 cells stimulated with TNF-α. Immunoblotting experiments revealed an inhibition of IKKα phosphorylation, with the resultant attenuation of phosphorylation and degradation of IκBα following LPS stimulation...
June 15, 2018: International Immunopharmacology
Shakila Sabir, Ammara Saleem, Muhammad Furqan Akhtar, Muhammad Saleem, Moosa Raza
Finding a radical cure for diabetes has reached paramount importance in medicine due to the widespread prevalence of the disease. A substantial reduction in insulin-secreting beta cells is evident in diabetes. The failure of cyclin-dependent kinases (CDKs) and cyclins to access the nucleus is responsible for quiescence or senescence in human and rodent beta cells. The augmentation of beta cell proliferation is supposed to reverse diabetes. This concept has inspired the discovery of newer drugs that encourage the proliferation of beta cells...
June 18, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Kazuyuki Sogawa, Mika Kobayashi, Jun Suzuki, Akihiro Sanda, Yoshio Kodera, Masafumi Fukuyama
 Group A streptococcus is a bacterium that resides in the throat and skin and causes respiratory infection and occasionally glomerulonephritis and rheumatic fever. Streptolysin O (SLO) produced by Streptococcus pyogenes (S. pyogenes) binds to the cell membrane, particularly to that of white and red blood cells, and is toxic to the cells and tissue. In this study, we evaluated the inhibitory activity of water-soluble polyphenols in olives (Olea europaea) against SLO-induced hemolysis. Hydroxytyrosol inhibited SLO-induced hemolytic activity, and the amount required for 50% inhibition of hemolysis was 1...
2018: Biocontrol Science
Hari Madhuri Doss, Snigdha Samarpita, Ramamoorthi Ganesan, Mahaboobkhan Rasool
AIMS: Bone erosion induced by enhanced osteoclast formation is a debilitating pathological phenomenon in rheumatoid arthritis (RA). Recent finding has revealed that ferulic acid is associated with reduced osteoclast differentiation and bone erosion. However, the underlying mechanism through which ferulic acid inhibited osteoclast differentiation and bone erosion still remains to be elucidated. This study assessed the therapeutic effects of ferulic acid on osteoclast differentiation and bone erosion by targeting RANKL dependent NF-κB pathway...
June 14, 2018: Life Sciences
Katrine Nøhr-Meldgaard, Armen Ovsepian, Hanne Ingmer, Martin Vestergaard
Development of new antibiotics is costly and time-consuming and therefore it is highly attractive if the efficacy of conventional antibiotics can be expanded. For the human pathogen, Staphylococcus aureus, we recently demonstrated that inactivation of the ATP synthase increases the susceptibility of the pathogen 16-fold to the aminoglycoside, gentamicin. Aminoglycosides are rarely used as monotherapy against S. aureus due to the risk of resistance development and toxic effects. Here we have explored the possibility of enhancing the efficacy of aminoglycosides against S...
June 12, 2018: International Journal of Antimicrobial Agents
Cesar H E C Poli, Kara J Thornton-Kurth, Jerrad F Legako, Carolina Bremm, Viviane S Hampel, Jeffery Hall, Ignacio R Ipharraguerre, Juan J Villalba
Plant bioactives can potentially benefit herbivores through their effects on health and nutrition. The objective of this study was to determine the importance of polyphenols and terpenes on the ability of lambs to self-select these compounds when challenged by a parasitic infection and the subsequent impact on their health and productivity. Thirty-five lambs were housed in individual pens and assigned to five treatment groups (7 animals/group), where they received: 1) A basal diet of beet pulp:soybean meal (90:10) (CONTROL); 2) The same diet, but containing 0...
June 12, 2018: Physiology & Behavior
D Crisan, K Scharffetter-Kochanek, M Crisan, S Schatz, H Hainzl, L Olenic, A Filip, L A Schneider, A Sindrilaru
New biomaterials based on nanoparticles (NPs) carrying polyphenols-rich extracts (Cornus mas) recently showed promising anti-inflammatory activity in psoriasis. We aimed to understand how topically delivered silver and gold nanoparticles complexed with Cornus mas (Ag-NPs-CM, Au-NPs-CM) modulate inflammation in psoriasis at cellular and molecular level. The impact on psoriatic inflammation was assessed in vitro on pro-inflammatory macrophages, by clinical score, high-frequency ultrasonography and immunohistology of psoriasis plaques treated with Ag-NPs-CM, Au-NPs-CM or control...
June 15, 2018: Experimental Dermatology
Andreas Zimmermann, Sebastian Hofer, Tobias Pendl, Katharina Kainz, Frank Madeo, Didac Carmona-Gutierrez
In the search for interventions against aging and age-related diseases, biological screening platforms are indispensable tools to identify anti-aging compounds among large substance libraries. The budding yeast, Saccharomyces cerevisiae, has emerged as a powerful chemical and genetic screening platform, as it combines a rapid workflow with experimental amenability and the availability of a wide range of genetic mutant libraries. Given the amount of conserved genes and aging mechanisms between yeast and human, testing candidate anti-aging substances in yeast gene-deletion or overexpression collections, or de novo derived mutants, has proven highly successful in finding potential molecular targets...
September 1, 2018: FEMS Yeast Research
Maryam Abtin, Mohammad R Alivand, Mahmoud S Khaniani, Milad Bastami, Mohammad Zaeifizadeh, Sima M Derakhshan
Breast cancer (BC) is the leading cause of cancer mortality in women worldwide. It recently was proven that miRNAs play a critical role in BC development. The use of natural agents for control of cancer by modulating miRNAs is promising. Oleuropein is a natural polyphenolic agent with anti-neoplastic properties and is well tolerated by humans. This study was undertaken to determine the therapeutic effects of oleuropein through modulation of master oncomiRs (miR-21 and miR-155) in BC cells. The present study provides the first link between miRNA and oleuropein as a mechanism in BC...
June 15, 2018: Journal of Cellular Biochemistry
Huashu Ma, Zongxu Qiao
Scarred uterus is caused by cesarean section surgery, and this condition affects further gestation and delivery in patients. Previous evidence suggested that resveratrol, a polyphenol compound, presents beneficial outcomes for patients with scarred uterus. Therefore, the aim of the present study was to analyze the efficacy of resveratrol in the treatment of patients with scarred uterus. The efficacy of resveratrol in the formation of new vessels and re-epithelialization of the endometrium was analyzed. The present results demonstrated that resveratrol treatment reduced uterus scarring in the majority of patients (87...
June 2018: Experimental and Therapeutic Medicine
Wenzhe Yu, Mengru Tao, Yueliang Zhao, Xiaoqian Hu, Mingfu Wang
Advanced glycation end products (AGEs) could interact with the receptor for AGE (RAGE) as a sterile danger signal to induce inflammation. 4′-methoxyresveratrol (4′MR), a polyphenol derived from Dipterocarpaceae, has not been studied for its anti-inflammation effects. In the present study, we sought to explore the protective role of 4′MR in AGEs-induced inflammatory model using RAW264.7 macrophages. 4′MR significantly inhibited gene expression of pro-inflammatory cytokines and chemokines, such as interleukin 1β (IL-1β), interleukin 6 (IL-6), tumor necrosis factor-alpha (TNF-α) and monocyte chemoattractant protein-1 (MCP-1), as well as two typical pro-inflammatory enzymes, inducible nitric oxide synthase (iNOS) and cyclooxygenase 2 (COX2)...
June 14, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Chunli Song, Huanhuan Yang, Xiaochao Song, Deming Li, Xinli Li
OBJECTIVE: To investigate the effects of apple polyphenol on cell proliferation and migration of breast cancer cell line MDA-MB-231, and explore the potential mechanism. METHODS: The breast cancer cells in the logarithmic phase were treated with 0, 50, 100, 200, 400 and 800 μg/m L of apple polyphenol for 24, 48 and 72 h, then Trypan blue staining was employed to detect cell vitality; CCK8 kit was used to determine cell growth and proliferation; cell migration ability was observed by scratch experiment, and the change of proteins expression level was assessed by Western blot...
November 2017: Wei Sheng Yan Jiu, Journal of Hygiene Research
Mohsen Hanana, Hajer Mezghenni, Rayda Ben Ayed, Ali Ben Dhiab, Slim Jarradi, Bassem Jamoussi, Lamia Hamrouni
BACKGROUND: Argan oil is traditionally produced by cold pressing in South-western Morocco where rural population uses it as edible oil as well as for its therapeutic properties which give them in counterpart valuable income. Given the economical interest of this oil, several attempts of fraudulency have been registered in the world global market leading to loss of authenticity. Our purpose is to launch a program of Tunisian Argan oil valorization since trees from this species have been introduced sixty years ago in Tunisia...
June 15, 2018: Lipids in Health and Disease
Claudia Albrecht, María Laura Guzmán, María Cecilia Cittadini, Alejandra Mariel Canalis, Mirta Ana Valentich, María Eugenia Olivera, Elio Andrés Soria
BACKGROUND: Plant extracts can be obtained to carry bioactive compounds, useful for prevention and treatment of different illnesses. This also supports the intake of teas as functional beverages. Nonetheless, it is incompletely known whether these extracts can act as effective sources and vehicles de phenolic compounds (phenolics/polyphenols) to reach their targets. OBJECTIVE: To establish whether phytoextract ingestion modified in a sex-dependent manner the phenolic bioavailability and redox response in liver and kidney...
March 26, 2018: Revista de la Facultad de Ciencias Médicas
Xiaoxia Ye, Le Ke, Yaping Wang, Kaiyang Gao, Yiwen Cui, Xiaoling Wang, Xin Huang, Bi Shi
Superhydrophobic materials hold great promise in emulsion separation, while they have inherent mechanical weakness and are ineffective to separate mixed surfactant-stabilized emulsions. Herein, we combined the adhesion ability of polyphenol-Fe3+ bis-complexes with high mechanical strength of carbon nanotubes (CNTs) to construct a mechanically robust and superhydrophobic coating on collagen fiber membrane (CFM). We demonstrated that both CNTs and polyphenolic complexes competed with the surfactants adsorbed onto emulsion droplets, serving as efficient demulsifiers to various mixed surfactant-stabilized emulsions...
June 14, 2018: Chemistry: a European Journal
Marcela Bucekova, Monika Buriova, Ladislav Pekarik, Viktor Majtan, Juraj Majtan
Honeydew honey is increasingly valued due to its pronounced antibacterial potential; however, the underlying mechanism and compounds responsible for the strong antibacterial activity of honeydew honey are still unknown. The aim of this study was to investigate the inhibition of bacterial growth of 23 honeydew honey samples. Activity of bee-derived glucose oxidase (GOX) enzyme, the content of defensin-1 (Def-1) and hydrogen peroxide (H2 O2 ), and total polyphenol content were determined in the 23 honey samples...
June 13, 2018: Scientific Reports
Lifeng Zhu, Zhisong Yang, Ran Yao, Liangliang Xu, Hua Chen, Xiaodong Gu, Tonggui Wu, Xuyu Yang
Gut microbes can enhance the ability of hosts to consume secondary plant compounds and, therefore, expand the dietary niche breadth of mammalian herbivores. The giant and red pandas are bamboo-eating specialists within the mammalian order Carnivora. Bamboo contains abundant plant secondary metabolites (e.g., cyanide-containing compounds). However, Carnivora species, including the giant panda, have deficient levels of rhodanese (one of the essential cyanide detoxification enzymes) in their tissues compared with the same tissues of herbivores...
June 27, 2018: MSphere
Daniel González-Mendoza, Rosalba Troncoso-Rojas, Tania Gonzalez-Soto, Onecimo Grimaldo-Juarez, Carlos Ceceña-Duran, Dagoberto Duran-Hernandez, Federico Gutierrez-Miceli
The aim of the present work is to evaluate the changes on the phenylalanine ammonia lyase (PAL) activity, phenolic compounds accumulation and photochemical efficiency in leaves of P. glandulosa treated with Cd2+ (0.001 M) and Cu2+ (0.52 M) concentrations for 96 h under hydroponic conditions. The results showed that only leaves treated with copper had a decrease in photochemical efficiency and leaf epidermal polyphenols in P. glandulosa leaves after 96 h of exposure. On the other hand the reverse-phase HPLC analysis revealed higher levels of phenolic compound (gallic, vanillic and caffeic acids) and flavonoids (rutin and kaempferol-3-O-glucosides) in plant leaves from Cu and Cd-treatments with respect to control plants...
April 2018: Anais da Academia Brasileira de Ciências
Jaime Laqui-Estaña, Remigio López-Solís, Álvaro Peña-Neira, Marcela Medel-Marabolí, Elías Obreque-Slier
BACKGROUND: This study characterized the flavonoid and non-flavonoid phenolic composition of Carménère and Cabernet Sauvignon wines that were in contact with barrels, chips and staves during a 12-month aging period. The wines were evaluated by spectrophotometric (for total phenols, anthocyanins and tannins, colorant intensity, hue, CIElab parameters and fractionation into mono-, oligo- and polymer of proanthocyanidins) and HPLC-DAD analyses (for ellagitannins, gallotannins, anthocyanins and low molecular weight phenols)...
June 13, 2018: Journal of the Science of Food and Agriculture
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