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https://www.readbyqxmd.com/read/27909727/anti%C3%A2-proliferative-activity-of-epigallocatechin%C3%A2-3%C3%A2-gallate-and-silibinin-on-soft-tissue-sarcoma-cells
#1
Kamran Harati, Björn Behr, Christoph Wallner, Adrien Daigeler, Tobias Hirsch, Frank Jacobsen, Marcus Renner, Ali Harati, Marcus Lehnhardt, Mustafa Becerikli
Disseminated soft tissue sarcomas (STS) present a therapeutic dilemma. The first-line cytostatic doxorubicin demonstrates a response rate of 30% and is not suitable for elderly patients with underlying cardiac disease, due to its cardiotoxicity. Well‑tolerated alternative treatment options, particularly in palliative situations, are rare. Therefore, the present study assessed the anti‑proliferative effects of the natural compounds epigallocatechin-3-gallate (EGCG), silibinin and noscapine on STS cells. A total of eight different human STS cell lines were used in the study: Fibrosarcoma (HT1080), liposarcoma (SW872, T778 and MLS‑402), synovial sarcoma (SW982, SYO1 and 1273) and pleomorphic sarcoma (U2197)...
November 28, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27904095/synthesis-of-effective-food-constituents-toward-the-development-of-chemical-biology-investigations
#2
Tomohiro Asakawa
 This article describes the development of various probes and immunogens for chemical-biological investigations of food flavonoids. We accomplished a large (gram)-scale asymmetric synthesis of a key intermediate, 5-aminopentyl deoxy epigallocatechin-3-gallate (APDOEGCg; 3), an analogue of green tea polyphenol EGCg, in which the key step was cationic cyclization utilizing neighboring group participation of the gallate carbonyl group. The synthetic APDOEGCg (3) was efficiently converted to a fluorescent probe 18 and an immunogen 19 by utilizing the high reactivity of the amine functional group...
2016: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/27902918/recovery-of-chicken-growth-plate-by-heat-shock-protein-90-inhibitors-epigallocatechin-3-gallate-and-apigenin-in-thiram-induced-tibial-dyschondroplasia
#3
Muhammad Kashif Iqbal, Jingying Liu, Fazul Nabi, Mujeeb Ur Rehman, Hui Zhang, Adnan Hassan Tahir, Jiakui Li
Tibial dyschondroplasia (TD) is an important tibiotarsal bone disorder characterized by an avascular and nonmineralized growth plate; it is attributed to abnormal differentiation of chondrocytes and causes lameness. Heat-shock protein 90 (Hsp90) is a proangiogenic factor in animal tissues; however, its gene expression increases in cases of chicken TD. The objective of this study was to evaluate the efficacy of epigallocatechin-3-gallate (EGCG) and apigenin in thiram-induced TD birds; these substances were used because of their Hsp90 inhibitory activities...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27896922/-epigallocatechin-3-gallate-antihyperalgesic-effect-associates-with-reduced-cx3cl1-chemokine-expression-in-spinal-cord
#4
Marc Bosch-Mola, Judit Homs, Beltrán Álvarez-Pérez, Teresa Puig, Francisco Reina, Enrique Verdú, Pere Boadas-Vaello
(-)-Epigallocatechin-3-gallate (EGCG) is a major polyphenol in green tea with beneficial effects on the neuropathic pain alleviation in animal models. Because chemokine fractalkine (CX3CL1) has been suggested as an important signal during neuropathic pain development, this study aimed to investigate whether CX3CL1 expression may be modulated by EGCG treatment reducing hyperalgesia in chronic constriction injured mice. To this end, Balb/c mice were subjected to a chronic constriction injury of sciatic nerve (CCI) and treated with EGCG or vehicle once a day during the first week following surgery...
November 29, 2016: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/27890776/epigallocatechin-3-gallate-alleviates-paraquat-induced-acute-lung-injury-and-inhibits-upregulation-of-toll-like-receptors
#5
Haitao Shen, Na Wu, Zhenning Liu, Hongyu Zhao, Min Zhao
AIMS: To evaluate the detoxifying effect of epigallocatechin-3-gallate (EGCG) on paraquat (PQ)-induced acute lung injury in mice, and to explore the action mechanisms. MAIN METHODS: Following administration of PQ, the mice received a low, a medium or a high dose of EGCG daily for three days. Histopathology of the lungs were examined by H&E staining. The levels of inflammatory cytokines, such as TNF-α, IL-1β and IL-6, in the bronchoalveolar lavage fluid were measured by enzyme-linked immunosorbent assay...
November 24, 2016: Life Sciences
https://www.readbyqxmd.com/read/27889855/epigallocatechin-gallate-attenuates-%C3%AE-amyloid-generation-and-oxidative-stress-involvement-of-ppar%C3%AE-in-n2a-app695-cells
#6
Zhao-Xu Zhang, Yan-Bing Li, Rui-Ping Zhao
The accumulation of β-amyloid (Aβ) peptide plaques is a major pathogenic event in Alzheimer's disease (AD). Aβ is a cleaved fragment of APP via BACE1, which is the rate-limiting enzyme in APP processing and Aβ generation. Nuclear receptor peroxisome proliferator-activated receptor gamma (PPARγ) is considered to be a potential target for AD treatment, because of its potent antioxidant and inhibitory effects on Aβ production by negatively regulating BACE1. Epigallocatechin gallate (EGCG), a highly active catechin found in green tea, is known to enhance metabolic activity and cognitive ability in the mice model of AD...
November 26, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27886147/emerging-phytochemicals-for-the-prevention-and-treatment-of-head-and-neck-cancer
#7
REVIEW
Santosh K Katiyar
Despite the development of more advanced medical therapies, cancer management remains a problem. Head and neck squamous cell carcinoma (HNSCC) is a particularly challenging malignancy and requires more effective treatment strategies and a reduction in the debilitating morbidities associated with the therapies. Phytochemicals have long been used in ancient systems of medicine, and non-toxic phytochemicals are being considered as new options for the effective management of cancer. Here, we discuss the growth inhibitory and anti-cell migratory actions of proanthocyanidins from grape seeds (GSPs), polyphenols in green tea and honokiol, derived from the Magnolia species...
November 24, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27883924/physiological-effects-of-epigallocatechin-3-gallate-egcg-on-energy-expenditure-for-prospective-fat-oxidation-in-humans-a-systematic-review-and-meta-analysis
#8
REVIEW
Mahendra P Kapoor, Masaaki Sugita, Yoshitaka Fukuzawa, Tsutomu Okubo
Green tea catechins (GTCs) are known to improve fat oxidation (FOX) during fasted, rested and exercise conditions wherein epigallocatechin-3-gallate (EGCG) is thought to be the most pharmacologically active and has been studied extensively. From the available data of randomized controlled trials (RCTs) on EGCG, we carried out a systematic review and meta-analysis to elucidate whether EGCG consumption indeed increase energy expenditure (EE) and promote FOX. A systematic review of the literature was conducted using electronic databases (PubMed, Embase, Cochrane Library, CINAHL, JICST, JSTPLUS, and JMEDPLUS and others) and eight RCTs were included...
November 2, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27881069/anti-influenza-virus-effects-of-catechins-a-molecular-and-clinical-review
#9
Kazuke Ide, Yohei Kawasaki, Koji Kawakami, Hiroshi Yamada
Influenza infection and associated epidemics represent a serious public health problem. Several preventive and curative measures exist against its spread including vaccination and therapeutic agents such as neuraminidase inhibitors (e.g., oseltamivir, zanamivir, as well as peramivir and laninamivir, which are licensed in several countries) and adamantanes (e.g., amantadine and rimantadine). However, neuraminidase inhibitor- and adamantane-resistant viruses have been detected, whereas vaccines exhibit strain-specific effects and are limited in supply...
November 22, 2016: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/27881007/egcg-sensitizes-human-nasopharyngeal-carcinoma-cells-to-trail-mediated-apoptosis-by-activation-nf-%C3%AE%C2%BAb
#10
P Li, S Li, D Yin, J Li, L Wang, C Huang, X Yang
Aim of presented study was to investigate whether EGCG could sensitize TRAIL resistant NPC cells to TRAIL-mediated apoptosis. Three human NPC cell-lines CNE-1, CNE-2, C666-1 and a non-transformed nasopharyngeal epithelium cell-line NP-69 were treated with EGCG or/and TRAIL. The apoptosis and TRAIL receptors were determined by flow cytometric analysis. The protein expression was determined by western blotting. Mitochondrial transmembrane potential was dertemined by DiOC6 (3). C666-1 cell-line was the only one that resistant to TRAIL and selected to be treated with EGCG...
November 24, 2016: Neoplasma
https://www.readbyqxmd.com/read/27869750/biophysical-approach-to-mechanisms-of-cancer-prevention-and-treatment-with-green-tea-catechins
#11
REVIEW
Masami Suganuma, Atsushi Takahashi, Tatsuro Watanabe, Keisuke Iida, Takahisa Matsuzaki, Hiroshi Y Yoshikawa, Hirota Fujiki
Green tea catechin and green tea extract are now recognized as non-toxic cancer preventives for humans. We first review our brief historical development of green tea cancer prevention. Based on exciting evidence that green tea catechin, (-)-epigallocatechin gallate (EGCG) in drinking water inhibited lung metastasis of B16 melanoma cells, we and other researchers have studied the inhibitory mechanisms of metastasis with green tea catechins using biomechanical tools, atomic force microscopy (AFM) and microfluidic optical stretcher...
November 18, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27867269/platyphylloside-isolated-from-betula-platyphylla-inhibit-adipocyte-differentiation-and-induce-lipolysis-via-regulating-adipokines-including-ppar%C3%AE-in-3t3-l1-cells
#12
Mina Lee, Sang Hyun Sung
BACKGROUND: Obesity causes or aggravates many health problems, both independently and in association with several pathological disorders, including Type II diabetes, hypertension, atherosclerosis, and cancer. Therefore, we screened small compounds isolated from natural products for the development of anti-obesity drugs. OBJECTIVE: The purpose of this study was to investigate the anti-adipogenic activities of platyphylloside, diarylheptanoid isolated from Betula platyphylla, which was selected based on the screening using 3T3-L1 cells...
October 2016: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/27864105/epigallocatechin-3-gallate-prevents-cardiac-apoptosis-by-modulating-the-intrinsic-apoptotic-pathway-in-isoproterenol-induced-myocardial-infarction
#13
Azza I Othman, Magda M Elkomy, M A El-Missiry, Mohammed Dardor
(-)Epigallocatechin-gallate (EGCG) is an emerging natural therapy. This study examined the cardioprotective effect of EGCG on isoproterenol-induced myocardial damage and apoptosis and EGCG's role in modulating the expression of apoptotic signaling proteins. Experimental myocardial infarction was induced in albino Westar rats by isoproterenol (ISO) administration (100mg/kg, s.c.) at an interval of 24h on the 6th and 7th day. EGCG (15mg/kg, i.p.) was administered seven days before ISO. EGCG pretreatment significantly showed an anti-lipidemic effect and protected the cell membrane integrity, as shown by the blocking of changes in serum levels of CK-MB, LDH, ALP, ALT and troponin T...
November 15, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27855934/variation-of-theanine-phenolic-and-methylxanthine-compounds-in-21-cultivars-of-camellia-sinensis-harvested-in-different-seasons
#14
Rui Fang, Sally P Redfern, Don Kirkup, Elaine A Porter, Geoffrey C Kite, Leon A Terry, Mark J Berry, Monique S J Simmonds
This is the first study to use chemometric methods to differentiate among 21 cultivars of Camellia sinensis from China and between leaves harvested at different times of the year using 30 compounds implicated in the taste and quality of tea. Unique patterns of catechin derivatives were observed among cultivars and across harvest seasons. C. sinensis var. pubilimba (You 510) differed from the cultivars of C. sinensis var. sinensis, with higher levels of theobromine, (+)-catechin, gallocatechin, gallocatechin gallate and theasinensin B, and lower levels of (-)-epicatechin, (-)-epigallocatechin (EGC) and (-)-epigallocatechin gallate (EGCG), respectively...
April 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27855324/green-tea-polyphenol-epigallocatechin-3-gallate-differentially-induces-apoptosis-in-cll-b-and-t-cells-but-not-in-healthy-b-and-t-cells-in-a-dose-dependant-manner
#15
Scott Cornwall, Gavin Cull, David Joske, Reza Ghassemifar
B-cell chronic lymphocytic leukaemia (CLL) is characterized by an accumulation of CD5-positive monoclonal B-cells due in large part to a failure of apoptosis. The ability to study CLL B-cells in vitro has always been a challenge and hampered by the low viability of the CLL B-cells in cell culture systems. In this study, we present a multicellular cell culture system to maintain CLL B-cells viable in culture for 60h in the presence of a stromal cell feeder layer in combination with a whole white blood cell preparation...
November 2, 2016: Leukemia Research
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
#16
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
#17
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/27836540/wnt-%C3%AE-catenin-pathway-mediates-epigallocatechin-3-gallate-egcg-inhibition-of-lung-cancer-stem-cells
#18
Jianyun Zhu, Ye Jiang, Xue Yang, Shijia Wang, Chunfeng Xie, Xiaoting Li, Yuan Li, Yue Chen, Xiaoqian Wang, Yu Meng, Mingming Zhu, Rui Wu, Cong Huang, Xiao Ma, Shanshan Geng, Jieshu Wu, Caiyun Zhong
Cancer stem cells (CSCs) play essential role in the progression of many tumors. Wnt/β-catenin pathway is crucial in maintaining the stemness of CSCs. (-)-Epigallocatechin-3-gallate (EGCG), the major bioactive component in green tea, has been shown to possess anti-cancer activity. To date, the interventional effect of EGCG on lung CSCs has not been elucidated yet. In the present study, tumorsphere formation assay was used to enrich lung CSCs from A549 and H1299 cells. We revealed that Wnt/β-catenin pathway was activated in lung CSCs, and downregulation of β-catenin, abolished lung CSCs traits...
November 9, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27832636/inhibition-of-emmprin-and-mmp-9-expression-by-epigallocatechin-3-gallate-through-67-kda-laminin-receptor-in-pma-induced-macrophages
#19
Qi-Ming Wang, Hao Wang, Ya-Fei Li, Zhi-Yong Xie, Yao Ma, Jian-Jun Yan, Yi Fan Wei Gao, Ze-Mu Wang, Lian-Sheng Wang
BACKGROUND/AIMS: It is well documented that overexpression of EMMPRIN (extracellular matrix metalloproteinase inducer) and MMPs (matrix metalloproteinases) by monocytes/macrophages plays an important role in atherosclerotic plaque rupture. Green tea polyphenol epigallocatechin-3-gallate (EGCG) has a variety of pharmacological properties and exerts cardiovascular protective effects. Recently, the 67-kD laminin receptor (67LR) has been identified as a cell surface receptor of EGCG. The aim of the present study was to evaluate the effects of EGCG on the expression of EMMPRIN and MMP-9 in PMA-induced macrophages, and the potential mechanisms underlying its effects...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27830147/fbs-or-bsa-inhibits-egcg-induced-cell-death-through-covalent-binding-and-the-reduction-of-intracellular-ros-production
#20
Yin Zhang, Yu-Ying Xu, Wen-Jie Sun, Mo-Han Zhang, Yi-Fan Zheng, Han-Ming Shen, Jun Yang, Xin-Qiang Zhu
Previously we have shown that (-)-epigallocatechin gallate (EGCG) can induce nonapoptotic cell death in human hepatoma HepG2 cells only under serum-free condition. However, the underlying mechanism for serum in determining the cell fate remains to be answered. The effects of fetal bovine serum (FBS) and its major component bovine serum albumin (BSA) on EGCG-induced cell death were investigated in this study. It was found that BSA, just like FBS, can protect cells from EGCG-induced cell death in a dose-dependent manner...
2016: BioMed Research International
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