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https://www.readbyqxmd.com/read/28650631/effect-of-the-biphenyl-neolignan-honokiol-on-a%C3%AE-42-induced-toxicity-in-caenorhabditis-elegans-a%C3%AE-42-fibrillation-cholinesterase-activity-dpph-radicals-and-iron-ii-chelation
#1
Srinivas Kantham, Stephen Chan, Gawain McColl, Jared Miles, Suresh Kumar Veliyath, Girdhar Singh Deora, Satish N Dighe, Samira Khabbazi, Marie-Odile Parat, Benjamin P Ross
The biphenyl neolignan honokiol is a neuroprotectant which has been proposed as a treatment for central nervous system disorders such as Alzheimer's disease (AD). The death of cholinergic neurons in AD is attributed to multiple factors, including: accumulation and fibrillation of amyloid beta peptide (Aβ) within the brain; metal ion toxicity; and oxidative stress. In this study, we used a transgenic Caenorhabditis elegans model expressing full length Aβ42 as a convenient in vivo system for examining the effect of honokiol against Aβ-induced toxicity...
June 26, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28642806/the-efficacy-of-epigallocatechin-3-gallate-green-tea-in-the-treatment-of-alzheimer-s-disease-an-overview-of-pre-clinical-studies-and-translational-perspectives-in-clinical-practice
#2
REVIEW
Marco Cascella, Sabrina Bimonte, Maria Rosaria Muzio, Vincenzo Schiavone, Arturo Cuomo
Alzheimer's disease (AD) is a neurodegenerative disorder and the most common form of dementia characterized by cognitive and memory impairment. One of the mechanism involved in the pathogenesis of AD, is the oxidative stress being involved in AD's development and progression. In addition, several studies proved that chronic viral infections, mainly induced by Human herpesvirus 1 (HHV-1), Cytomegalovirus (CMV), Human herpesvirus 2 (HHV-2), and Hepatitis C virus (HCV) could be responsible for AD's neuropathology...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/28561817/epigallocatechin-3-gallate-attenuates-cerebral-cortex-damage-and-promotes-brain-regeneration-in-acrylamide-treated-rats
#3
Yin He, Dehong Tan, Yan Mi, Qian Zhou, Shujuan Ji
Acrylamide (ACR) is a neurotoxic industrial chemical intermediate, which is also present in food and water. We investigated the neuroprotective effects of epigallocatechin-3-gallate (EGCG), the most abundant polyphenol in green tea, on ACR-treated rat brain. Rats were pre-treated with EGCG for 4 d and then administered ACR and EGCG for 14 d. EGCG increased acetylcholinesterase (AChE) activity and the rate of Nissl-positive cells in ACR-treated rats. Senescence-associated β-galactosidase (SA-β-gal) staining indicated that EGCG attenuated ACR-induced senescence...
May 31, 2017: Food & Function
https://www.readbyqxmd.com/read/28440509/modulation-of-mmp-2-and-9-secretion-by-cytokines-inducers-and-inhibitors-in-human-melanoma-a-2058-cells
#4
M Waheed Roomi, Tatiana Kalinovsky, Aleksandra Niedzwiecki, Matthias Rath
Melanoma, an extremely aggressive cancer, causes the most skin cancer-related deaths, due to metastasis to other areas of the body, such as lymph nodes, lungs, liver, brain or bone. It is characterized by high levels of matrix metalloproteinase (MMP)-2 and -9 secretions that degrade the extracellular matrix and basement membrane, allowing cancer cells to spread to distal organs. Various cytokines, mitogens, growth factors, inducers and inhibitors control MMP activities. We investigated the roles of these in regulation of MMP-2 and -9 in human melanoma A-2058 cells...
April 24, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28377597/dyrk1a-overexpression-leads-to-increase-of-3r-tau-expression-and-cognitive-deficits-in-ts65dn-down-syndrome-mice
#5
Xiaomin Yin, Nana Jin, Jianhua Shi, Yanchong Zhang, Yue Wu, Cheng-Xin Gong, Khalid Iqbal, Fei Liu
Alternative splicing of tau exon 10 generates tau isoforms with three or four microtubule-binding repeats, 3R-tau and 4R-tau, which is equally expressed in adult human brain. Imbalanced expression in 3R-tau and 4R-tau has been found in several sporadic and inherited tauopathies, suggesting that dysregulation of tau exon 10 is sufficient to cause neurodegenerative diseases. We previously reported that Dyrk1A, which is overexpressed in Down syndrome brains, regulates alternative splicing of exogenous tau exon 10...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28356027/natural-polyphenols-in-the-treatment-of-alzheimer-s-disease
#6
Syed Badrul Syarifah Noratiqah, Isa Naina-Mohamed, Mohamed S Zulfarina, H M S Qodriyah
Neurodegenerative disease is an incurable disease which involves the degeneration or death of the nerve cells. Alzheimer's Disease (AD) is a neurodegenerative disease discovered in 1906 by Alois Alzheimer, a German clinical psychiatrist and neuroanatomist. The main pathological hallmarks of this disease are the formation of extracellular amyloid β (Aβ) plaques and intracellular neurofibrillary tangle (NFT). The accumulation of the amyloid protein aggregates in the brain of AD patients leads to oxidative stress and inflammation...
March 28, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28203607/epigallocatechin-gallate-a-useful-therapy-for-cognitive-disability-in-down-syndrome
#7
Fiorenza Stagni, Andrea Giacomini, Marco Emili, Sandra Guidi, Elisabetta Ciani, Renata Bartesaghi
Neurodevelopmental alterations and cognitive disability are constant features of Down syndrome (DS), a genetic condition due to triplication of chromosome 21. DYRK1A is one of the triplicated genes that is thought to be strongly involved in brain alterations. Treatment of Dyrk1A transgenic mice with epigallocatechin gallate (EGCG), an inhibitor of DYRK1A, improves cognitive performance, suggesting that EGCG may represent a suitable treatment of DS. Evidence in the Ts65Dn mouse model of DS shows that EGCG restores hippocampal development, although this effect is ephemeral...
2017: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/28177724/dose-dependent-decrease-in-mortality-with-no-cognitive-or-muscle-function-improvements-due-to-dietary-egcg-supplementation-in-aged-mice
#8
Brandt D Pence, Tushar K Bhattacharya, Pul Park, Jennifer L Rytych, Jacob M Allen, Yi Sun, Robert H McCusker, Keith W Kelley, Rodney W Johnson, Justin S Rhodes, Jeffrey A Woods
We have previously shown that a diet containing epigallocatechin gallate (EGCG) and beta-alanine is not effective in improving either cognitive or muscle function in aged (18 month) mice (Gibbons et al., Behav. Brain Res., 2014, 272:131-140; Pence et al., Appl. Physiol. Nutr. Metab., 2016, 41(2): 181-190). However, this diet reduced oxidative stress in the brain, and previous studies using longer term interventions and other doses have documented beneficial effects in cognitive and muscle function, especially with EGCG...
May 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28112361/modulation-of-mmp-2-and-mmp-9-secretion-by-cytokines-inducers-and-inhibitors-in-human-glioblastoma-t-98g-cells
#9
M Waheed Roomi, Tatiana Kalinovsky, Matthias Rath, Aleksandra Niedzwiecki
Brain tumors are highly aggressive, characterized by the secretion of high levels of matrix metalloproteinase (MMP)-2 and MMP-9 that degrade the extracellular matrix and basement membrane, allowing cancer cells to spread to distal organs. Various cytokines, mitogens, growth factors, inducers and inhibitors control MMP activity. We investigated the roles of these in the regulation of MMP-2 and MMP-9 in human glioblastoma T-98G cells. Human T-98G cells were grown in DME supplemented with 15% fetal bovine serum and antibiotics in 24-well tissue culture plates...
March 2017: Oncology Reports
https://www.readbyqxmd.com/read/28056735/effect-of-green-tea-phytochemicals-on-mood-and-cognition
#10
Christina Dietz, Matthijs Dekker
BACKGROUND: Green tea is traditionally known to induce mental clarity, cognitive function, physical activation and relaxation. Recently, a special green tea, matcha tea, is rapidly gaining popularity throughout the world and is frequently referred to as a mood- and brain food. Matcha tea consumption leads to much higher intake of green tea phytochemicals compared to regular green tea. Previous research on tea constituents caffeine, L-theanine, and epigallocatechin gallate (EGCG) repeatedly demonstrated benefits on mood and cognitive performance...
January 5, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28049055/synergistic-effects-of-negatively-charged-hydrophobic-nanoparticles-and-epigallocatechin-3-gallate-on-inhibiting-amyloid-%C3%AE-protein-aggregation
#11
Hongchen Liu, Linling Yu, Xiaoyan Dong, Yan Sun
Fibrillogenesis of amyloid β-protein (Aβ) in human brain has been implicated as the main cause of Alzheimer's disease. A few small molecules from natural sources have been discovered for their inhibition effects on Aβ fibrillation, of which (-)-epigallocatechin-3-gallate (EGCG) is one of the most broadly investigated compounds for its potent inhibitory activity. However, in vivo applicability of the inhibitors is largely limited by their low transmembrane efficiency. Hence, it is of great significance to develop inhibition systems that function at low concentrations...
April 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27941526/epigallocatechin-gallate-extends-therapeutic-window-of-recombinant-tissue-plasminogen-activator-treatment-for-brain-ischemic-stroke-a-randomized-double-blind-and-placebo-controlled-trial
#12
RANDOMIZED CONTROLLED TRIAL
Xue-Hui Wang, Yi-Ping You
OBJECTIVES: Recombinant tissue plasminogen activator (rt-PA) is a safe and effective treatment for acute brain ischemia stroke, albeit with a narrow therapeutic window. We aimed to assess the effect of epigallocatechin gallate (EGCG) in extending the rt-PA treatment window in this clinical trial among stroke patients. METHODS: Patients were randomly assigned according to their onset-to-treatment time (OTT) and were then treated with rt-PA simultaneously with EGCG or placebo...
January 2017: Clinical Neuropharmacology
https://www.readbyqxmd.com/read/27846826/natural-product-htp-screening-for-antibacterial-e-coli-0157-h7-and-anti-inflammatory-agents-in-lps-from-e-coli-o111-b4-activated-macrophages-and-microglial-cells-focus-on-sepsis
#13
Elizabeth A Mazzio, Nan Li, David Bauer, Patricia Mendonca, Equar Taka, Mohammed Darb, Leeshawn Thomas, Henry Williams, Karam F A Soliman
BACKGROUND: Acute systemic inflammatory response syndrome arising from infection can lead to multiple organ failure and death, with greater susceptibility occurring in immunocompromised individuals. Moreover, sub-acute chronic inflammation is a contributor to the pathology of diverse degenerative diseases (Parkinson's disease, Alzheimer's disease and arthritis). Given the known limitations in Western medicine to treat a broad range of inflammatory related illness as well as the emergence of antibiotic resistance, there is a renewed interest in complementary and alternative medicines (CAMs) to achieve these means...
November 15, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27844057/combined-treatment-with-environmental-enrichment-and-epigallocatechin-3-gallate-ameliorates-learning-deficits-and-hippocampal-alterations-in-a-mouse-model-of-down-syndrome
#14
Silvina Catuara-Solarz, Jose Espinosa-Carrasco, Ionas Erb, Klaus Langohr, Juan Ramon Gonzalez, Cedric Notredame, Mara Dierssen
Intellectual disability in Down syndrome (DS) is accompanied by altered neuro-architecture, deficient synaptic plasticity, and excitation-inhibition imbalance in critical brain regions for learning and memory. Recently, we have demonstrated beneficial effects of a combined treatment with green tea extract containing (-)-epigallocatechin-3-gallate (EGCG) and cognitive stimulation in young adult DS individuals. Although we could reproduce the cognitive-enhancing effects in mouse models, the underlying mechanisms of these beneficial effects are unknown...
September 2016: ENeuro
https://www.readbyqxmd.com/read/27829351/recent-updates-in-imperative-natural-compounds-for-healthy-brain-and-nerve-function-a-systematic-review-of-implications-for-multiple-sclerosis
#15
Nima Sanadgol, Shahram Shahraki Zahedani, Mohammad Sharifzadeh, Roghayeh Khalseh, Gullam Reza Barbari, Mohammad Abdollahi
BACKGROUND: The evolution of the 'Green' movement in western society has changed attitudes in the general population who now perceive natural compounds as being inherently harmless and more desirable than artificial chemical products. OBJECTIVE: Considering the growing interest towards introducing naturally emerged medicines, the purpose of this review was to overview the ongoing research into prevention and treatment of multiple sclerosis (MS) lesions. METHOD: This review was carried out by searching bibliographic databases such as PubMed and Scopus for studies reported between 1th January 2008 to 30rd January 2016 on MS patients or animal models of MS, investigating the beneficial effects of natural compounds in MS treatment...
November 8, 2016: Current Drug Targets
https://www.readbyqxmd.com/read/27659729/chronic-infusion-of-epigallocatechin-3-o-gallate-into-the-hypothalamic-paraventricular-nucleus-attenuates-hypertension-and-sympathoexcitation-by-restoring-neurotransmitters-and-cytokines
#16
Qiu-Yue Yi, Hong-Bao Li, Jie Qi, Xiao-Jing Yu, Chan-Juan Huo, Xiang Li, Juan Bai, Hong-Li Gao, Bo Kou, Kai-Li Liu, Dong-Dong Zhang, Wen-Sheng Chen, Wei Cui, Guo-Qing Zhu, Xiao-Lian Shi, Yu-Ming Kang
Reactive oxygen species (ROS) in the brain are involved in the pathogenesis of hypertension. Epigallocatechin-3-O-gallate (EGCG), one of the active compounds in green tea, has anti-oxidant, anti-inflammatory and vascular protective properties. This study was designed to determine whether chronic infusion of EGCG into the hypothalamic paraventricular nucleus (PVN) attenuates ROS and sympathetic activity and delays the progression of hypertension by up-regulating anti-inflammatory cytokines, reducing pro-inflammatory cytokines (PICs) and decreasing nuclear factor-kappa B (NF-κB) activity, as well as restoring the neurotransmitters balance in the PVN of spontaneously hypertensive rats (SHR)...
November 16, 2016: Toxicology Letters
https://www.readbyqxmd.com/read/27639810/potential-for-brain-accessibility-and-analysis-of-stability-of-selected-flavonoids-in-relation-to-neuroprotection-in-vitro
#17
Lea Pogačnik, Katja Pirc, Inês Palmela, Mihaela Skrt, Kwang S Kim, Dora Brites, Maria Alexandra Brito, Nataša Poklar Ulrih, Rui F M Silva
Natural food sources constitute a promising source of new compounds with neuroprotective properties, once they have the ability to reach the brain. Our aim was to evaluate the brain accessibility of quercetin, epigallocatechin gallate (EGCG) and cyanidin-3-glucoside (C3G) in relation to their neuroprotective capability. Primary cortical neuron cultures were exposed to oxidative insult in the absence and presence of the selected compounds, and neuroprotection was assessed through evaluation of apoptotic-like and necrotic-like cell death...
November 15, 2016: Brain Research
https://www.readbyqxmd.com/read/27457036/short-and-long-term-effects-of-neonatal-pharmacotherapy-with-epigallocatechin-3-gallate-on-hippocampal-development-in-the-ts65dn-mouse-model-of-down-syndrome
#18
Fiorenza Stagni, Andrea Giacomini, Marco Emili, Stefania Trazzi, Sandra Guidi, Martina Sassi, Elisabetta Ciani, Roberto Rimondini, Renata Bartesaghi
Cognitive disability is an unavoidable feature of Down syndrome (DS), a genetic disorder due to the triplication of human chromosome 21. DS is associated with alterations of neurogenesis, neuron maturation and connectivity that are already present at prenatal life stages. Recent evidence shows that pharmacotherapies can have a large impact on the trisomic brain provided that they are administered perinatally. Epigallocatechin-3-gallate (EGCG), the major polyphenol of green tea, performs many actions in the brain, including inhibition of DYRK1A, a kinase that is over-expressed in the DS brain and contributes to the DS phenotype...
October 1, 2016: Neuroscience
https://www.readbyqxmd.com/read/27400086/the-antioxidant-effect-of-green-tea-mega-egcg-against-electromagnetic-radiation-induced-oxidative-stress-in-the-hippocampus-and-striatum-of-rats
#19
Nawal A Ahmed, Nasr M Radwan, Heba S Aboul Ezz, Noha A Salama
Electromagnetic radiation (EMR) of cellular phones may affect biological systems by increasing free radicals and changing the antioxidant defense systems of tissues, eventually leading to oxidative stress. Green tea has recently attracted significant attention due to its health benefits in a variety of disorders, ranging from cancer to weight loss. Thus, the aim of the present study was to investigate the effect of EMR (frequency 900 MHz modulated at 217 Hz, power density 0.02 mW/cm(2), SAR 1.245 W/kg) on different oxidative stress parameters in the hippocampus and striatum of adult rats...
2017: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/27268025/potential-neuroprotective-properties-of-epigallocatechin-3-gallate-egcg
#20
REVIEW
Neha Atulkumar Singh, Abul Kalam Azad Mandal, Zaved Ahmed Khan
Neurodegenerative diseases such as Alzheimer's disease (AD) and Parkinson's disease (PD) enforce an overwhelming social and economic burden on society. They are primarily characterized through the accumulation of modified proteins, which further trigger biological responses such as inflammation, oxidative stress, excitotoxicity and modulation of signalling pathways. In a hope for cure, these diseases have been studied extensively over the last decade to successfully develop symptom-oriented therapies. However, so far no definite cure has been found...
June 7, 2016: Nutrition Journal
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