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Green tea and cancer

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https://www.readbyqxmd.com/read/29230104/metformin-sensitizes-non-small-cell-lung-cancer-cells-to-an-epigallocatechin-3-gallate-egcg-treatment-by-suppressing-the-nrf2-ho-1-signaling-pathway
#1
Chenxiao Yu, Yang Jiao, Jiao Xue, Qi Zhang, Hongying Yang, Ligang Xing, Guangxia Chen, Jinchang Wu, Shuyu Zhang, Wei Zhu, Jianping Cao
Non-small cell lung cancer (NSCLC) is the most common type of lung cancer. (-)-Epigallocatechin-3-gallate (EGCG), a major polyphenol in green tea, is widely studied as a cancer chemopreventive agent with potential anti-cancer effects. The NF-E2-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) signaling pathway is considered to mediate cellular resistance to EGCG. Metformin, a classical antidiabetic drug, has been shown to prevent cancer progression. Researchers have not reported whether metformin potentiates the anti-cancer efficacy of EGCG...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/29228755/long-term-supplementation-of-decaffeinated-green-tea-extract-does-not-modify-body-weight-or-abdominal-obesity-in-a-randomized-trial-of-men-at-high-risk-for-prostate-cancer
#2
Nagi B Kumar, Roshni Patel, Julio Pow-Sang, Philippe E Spiess, Raoul Salup, Christopher R Williams, Michael J Schell
Background: Evidence continues to demonstrate the role of obesity in prostate carcinogenesis and prognosis, underscoring the need to identify and continue to evaluate the effective interventions to reduce obesity in populations at high risk. The aim of the study was to determine the effect of daily consumption of decaffeinated green tea catechins (GTC) formulation (Polyphenon E® (PolyE)) for 1 year on biomarkers of obesity in men who are at high risk for prostate cancer. Materials and Methods: A randomized, double-blinded trial was conducted targeting 97 men diagnosed with HGPIN or ASAP...
November 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29200719/anti-cancer-effects-of-polyphenolic-compounds-in-epidermal-growth-factor-receptor-tyrosine-kinase-inhibitor-resistant-non-small-cell-lung-cancer
#3
Hyungmin Jeong, Ai N H Phan, Jong-Whan Choi
Background: Polyphenolic phytochemicals are natural compounds, easily found in fruits and vegetables. Importantly, polyphenols have been intensively studied as excellent antioxidant activity which contributes to anticancer function of the natural compounds. Lung cancer has been reported to mainly account for cancer-related deaths in the world. Moreover, epidermal growth factor receptor tyrosine kinase inhibitor (TKI) resistance is one of the biggest issues in cancer treatment, especially in nonsmall cell lung cancer (NSCLC)...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29168653/utilizing-biomarkers-in-colorectal-cancer-an-interview-with-ajay-goel
#4
Ajay Goel
Ajay Goel, PhD, is a Professor and Director, Center for Gastrointestinal Research, and Director, Center for Translational Genomics and Oncology, at the Baylor Scott & White Research Institute, Baylor University Medical Center in Dallas, Texas. Dr Goel has spent more than 20 years researching cancer and has been the lead author or contributor to over 240 scientific articles published in peer-reviewed international journals and several book chapters. He is also a primary inventor on more than 15 international patents aimed at developing various biomarkers for the diagnosis, prognosis and prediction of gastrointestinal cancers...
November 23, 2017: Future Oncology
https://www.readbyqxmd.com/read/29137307/reversal-of-5-fluorouracil-resistance-by-egcg-is-mediate-by-inactivation-of-tfap2a-vegf-signaling-pathway-and-down-regulation-of-mdr-1-and-p-gp-expression-in-gastric-cancer
#5
Hongsheng Tang, Lisi Zeng, Jiahong Wang, Xiangliang Zhang, Qiang Ruan, Jin Wang, Shuzhong Cui, Dinghua Yang
The effect of 5-fluorouracil (5-FU) chemotherapy for gastric cancer (GC) is limited by drug-resistance. To conquer this drug-resistance, various treatments including combination therapy have been used, but the overall survival has not been improved yet. In our current study, 5-FU resistant GC cells, SGC7901/FU and MGC803/FU, were established by long term exposure to 5-FU, and the proliferation capability of these resistant cells was verified to be reduced. The drug related proteins, MDR1 and P-gp were up-regulated in resistant cells compared to the parental cells...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29113871/oxidative-stress-and-dietary-phytochemicals-role-in-cancer-chemoprevention-and-treatment
#6
Shireen Chikara, Lokesh Dalasanur Nagaprashantha, Jyotsana Singhal, David Horne, Sanjay Awasthi, Sharad S Singhal
Several epidemiological observations have shown an inverse relation between consumption of plant-based foods, rich in phytochemicals, and incidence of cancer. Phytochemicals, secondary plant metabolites, via their antioxidant property play a key role in cancer chemoprevention by suppressing oxidative stress-induced DNA damage. In addition, they modulate several oxidative stress-mediated signaling pathways through their anti-oxidant effects, and ultimately protect cells from undergoing molecular changes that trigger carcinogenesis...
January 28, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29103966/an-update-of-research-evidence-on-nutrition-and-prostate-cancer
#7
REVIEW
Pao-Hwa Lin, William Aronson, Stephen J Freedland
BACKGROUND: Prostate cancer (PCa) remains a leading cause of mortality in US and other countries. Preclinical and clinical studies have examined the role of nutrition and dietary intake on the incidence and progression of PCa with mixed results. OBJECTIVE: The objective of this chapter is to provide an update of recent published literature and highlight progress in the field. MAIN FINDINGS: Low carbohydrate intake, soy protein, ω3 fat, green teas, tomatoes and tomato products and the herbal mixture-zyflamend showed promise in reducing PCa risk or progression...
November 2, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/29101735/a-potential-role-for-green-tea-as-a-radiation-sensitizer-for-prostate-cancer
#8
Andrew C Schroeder, Huaping Xiao, Ziwen Zhu, Qing Li, Qian Bai, Mark R Wakefield, Jeffrey D Mann, Yujiang Fang
Prostate cancer (PCa) is the most common non-cutaneous cancer in the United States. There is currently a lack of safe and effective radiosensitizers that can enhance the effectiveness of radiation treatment (RT) for Pca. Clonogenic assay, PCNA staining, Quick Cell Proliferation assay, TUNEL staining and caspase-3 activity assay were used to assess proliferation and apoptosis in DU145 Pca cells. RT-PCR/IHC were used to investigate the mechanisms. We found that the percentage of colonies, PCNA staining intensity, and the optical density value of DU145 cells were decreased (RT/GT vs...
November 3, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/29095434/a-new-molecular-mechanism-underlying-the-egcg-mediated-autophagic-modulation-of-afp-in-hepg2-cells
#9
Lin Zhao, Shengtang Liu, Jiaying Xu, Wei Li, Guangxin Duan, Haichao Wang, Huilin Yang, Zaixing Yang, Ruhong Zhou
Epigallocatechingallate (EGCG) is a major bioactive component of green tea and is associated with health benefits against multiple diseases including cancer. As an indicator of hepatocellular carcinoma (HCC), high levels of α-fetal protein (AFP) are related to malignant differentiation and poor prognosis of cancer cells. In this study, EGCG can effectively reduce AFP secretion and simultaneously induce AFP aggregation in human HCC HepG2 cells. EGCG-stimulated autophagy induces the degradation of AFP aggregates in HepG2 cells...
November 2, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29076523/coffee-and-green-tea-consumption-and-subsequent-risk-of-acute-myeloid-leukemia-and-myelodysplastic-syndromes-in-japan
#10
Tomotaka Ugai, Keitaro Matsuo, Norie Sawada, Motoki Iwasaki, Taiki Yamaji, Taichi Shimazu, Atsushi Goto, Manami Inoue, Yoshinobu Kanda, Shoichiro Tsugane
Although coffee and green tea are suggested to reduce the risk of some types of cancers, only a few epidemiological studies have investigated their effect on the risk of acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS). Here, we investigated the association of coffee and green tea consumption and the risk of AML and MDS in a large-scale population-based cohort study in Japan. A total of 95,807 Japanese subjects (45,937 men and 49,870 women; age 40-69 years at baseline) were followed to the end of 2012, for an average of 18 years...
October 27, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29072829/actual-daily-intakes-of-tea-catechins-and-thier-estimation-according-to-four-season-3-day-weighed-dietary-records-and-a-short-food-frequency-questionnaire-among-japanese-men-and-women
#11
Kaori Endoh, Yuji Matsui, Masao Takeshita, Mitsuhiro Katashima, Koichi Yasunaga, Kiyonori Kuriki
Background: Tea catechins are considered to be important preventive factors of cancer on several organs; however, the relationships of the actual daily intakes (ADIs) on the preventive effects have not been adequately addressed. We measured the ADIs of tea catechins as annual averages derived from every their ingested cups recorded by each subject, and the estimation models were established considering tea origin. Methods: Fifty-nine Japanese men and women completed four season 3 day weighed dietary records (WDRs) and a food frequency questionnaire (FFQ), and samples of green, oolong and black teas, ingested during a total 12 days were collected for the analysis...
October 26, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29072397/the-dna-methyltransferase-3b-149-genetic-polymorphism-modulates-lung-cancer-risk-from-smoking
#12
Chung Yu Lai, Chia Chen Huang, Chin Hung Tsai, Jiun Yao Wang, Chih Ling Kerr, Yi Yu Chen, Yan Wei Cai, Ruey Hong Wong
Background: Smoking can cause increase of DNA methylation and hypermethylation of tumor suppressor genes, this possible contributing to subsequent lung cancer development. DNA methyltransferase 3B (DNMT3B) is crucial in regulation of DNA methylation and it has been proposed that green tea might lower cancer risk through inhibiting its activity. Here, we designed a case-control study to investigate whether the DNMT3B -149 genetic polymorphism could modulate lung cancer risk due to smoking. Possible interactions of smoking and green tea consumption with this DNMT3B genetic polymorphism were also assessed...
October 26, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29066865/the-roles-of-epigallocatechin-3-gallate-in-the-treatment-of-neuropathic-pain-an-update-on-preclinical-in-vivo-studies-and-future-perspectives
#13
REVIEW
Sabrina Bimonte, Marco Cascella, Vincenzo Schiavone, Farrokh Mehrabi-Kermani, Arturo Cuomo
Neuropathic pain (NP) is a complex and chronic disease caused by lesions or defects of the somatosensory nervous system. The treatments normally used for managing NP usually lack efficacy. Several animal models of NP have been engineered in order to understand the molecular mechanisms underlying NP and to find alternative molecules to use as new therapeutic agents. Preclinical in vivo studies identified the epigallocatechin-3-gallate (EGCG), a main active component of green tea (Camellia sinensis), as a possible therapeutic molecule for NP treatment due to its anti-inflammatory and antioxidant properties...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29043851/antioxidants-in-the-treatment-of-cancer
#14
Kanthi Athreya, Marin F Xavier
Several clinical trials have produced conflicting results regarding the benefit of antioxidants in cancer therapy thus questioning the incorporation of these substances in standard treatment regimens. Vitamins E and C, selenium, carotenoids, lycopene, soy products, and green tea extract are a few substances with antioxidant properties that have been studied in detail. This article reviews the results generated over the last 20 years through in vitro and in vivo studies in various types of cancers and stages of cancer treatment...
October 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/29024813/a-prodrug-of-green-tea-polyphenol-epigallocatechin-3-gallate-pro-egcg-serves-as-a-novel-angiogenesis-inhibitor-in-endometrial-cancer
#15
Jianzhang Wang, Gene Chi Wai Man, Tak Hang Chan, Joseph Kwong, Chi Chiu Wang
Anti-angiogenesis effect of a prodrug of green tea polyphenol (-)-epigallocatechin-3-gallate (Pro-EGCG) in malignant tumors is not well studied. Here, we investigated how the treatment with Pro-EGCG inhibited tumor angiogenesis in endometrial cancer. Tumor xenografts of human endometrial cancer were established and subjected to microarray analysis after Pro-EGCG treatment. First, we showed Pro-EGCG inhibited tumor angiogenesis in xenograft models through down-regulation of vascular endothelial growth factor A (VEGFA) and hypoxia inducible factor 1 alpha (HIF1α) in tumor cells and chemokine (C-X-C motif) ligand 12 (CXCL12) in host stroma by immunohistochemical staining...
October 9, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28980522/association-between-green-tea-intake-and-risk-of-gastric-cancer-a-systematic-review-and-dose-response-meta-analysis-of-observational-studies
#16
Yanhong Huang, Hongru Chen, Liang Zhou, Gaoming Li, Dali Yi, Yanqi Zhang, Yazhou Wu, Xiaoyu Liu, Xiaojiao Wu, Qiuyue Song, Ling Liu, Dong Yi
OBJECTIVE: To examine and quantify the potential dose-response relationship between green tea intake and the risk of gastric cancer. DESIGN: We searched PubMed, EMBASE, Web of Science, CBM, CNKI and VIP up to December 2015 without language restrictions. SETTING: A systematic review and dose-response meta-analysis of observational studies. SUBJECTS: Five cohort studies and eight case-control studies. RESULTS: Compared with the lowest level of green tea intake, the pooled relative risk (95 % CI) of gastric cancer was 1·05 (0·90, 1·21, I 2=20·3 %) for the cohort studies and the pooled OR (95 % CI) was 0·84 (0·74, 0·95, I 2=48·3 %) for the case-control studies...
October 5, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28977833/unique-synergistic-formulation-of-curcumin-epicatechin-gallate-and-resveratrol-tricurin-suppresses-hpv-e6-eliminates-hpv-cancer-cells-and-inhibits-tumor-progression
#17
Sumit Mukherjee, Priya Ranjan Debata, Rahman Hussaini, Kaushiki Chatterjee, Juliet N E Baidoo, Samay Sampat, Anita Szerszen, Joseph P Navarra, Jimmie Fata, Elena Severinova, Probal Banerjee, Mario R Castellanos
Curcumin (from curry) (C) is highly potent against cervical cancer cells (CCC), but poor bioavailability has limited its clinical use. Similar natural polyphenols resveratrol (from grapes) (R), and epicatechin gallate (from green tea) (E) also display activity against CCC. By treating CCC (HeLa) with C, E, or R, or combinations of these compounds, we computed combination indices and observed a strong synergism among C, E, and R at the unique molar ratio 4:1:12.5. This combination, named as TriCurin, rapidly down regulated HPV18 E6 and NF-kB expression while concomitantly inducing the tumor suppressor protein p53 in HeLa cells...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28969404/effect-of-green-tea-catechins-in-patients-with-high-grade-prostatic-intraepithelial-neoplasia-results-of-a-short-term-double-blind-placebo-controlled-phase-ii-clinical-trial
#18
Salvatore Micali, Angelo Territo, Giacomo Maria Pirola, Nancy Ferrari, Maria Chiara Sighinolfi, Eugenio Martorana, Michele Navarra, Giampaolo Bianchi
BACKGROUND AND STUDY OBJECTIVE: Several studies suggest a protective role of green tea catechins against prostate cancer (PCa). In order to evaluate the efficacy of green tea catechins for chemoprevention of PCa in patients with high-grade prostate intraepithelial neoplasia (HG-PIN) we performed a phase II clinical trial. METHODS: Sixty volunteers with HG-PIN were enrolled to carry out a double-blind randomized placebo-controlled phase II clinical trial. Treated group took daily 600 mg of green tea catechins (Categ Plus®) for 1 year...
October 3, 2017: Archivio Italiano di Urologia, Andrologia
https://www.readbyqxmd.com/read/28964574/epigallocatechin-3-gallate-promotes-apoptosis-and-reversal-of-multidrug-resistance-in-esophageal-cancer-cells
#19
Liang Liu, Yingchao Ju, Jing Wang, Rongmiao Zhou
Evidence for demonstrating the role of the green tea component epigallocatechin-3-gallate (EGCG) in esophageal squamous cell carcinoma cells is limited. In this study, we investigated apoptosis induced by EGCG and the underlying molecular mechanisms in human esophageal squamous cell carcinoma cells. The growth-inhibitory effects of EGCG on esophageal cancer cell (Eca109 and Ec9706) were detected by MTT. Using flow cytometry, we determined the cellular apoptosis, bcl-2, bax and caspase-3 protein expression in Eca109 and Ec9706 cells following treatment with EGCG for 24h...
October 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28961534/hyaluronic-acid-green-tea-catechin-micellar-nanocomplexes-fail-safe-cisplatin-nanomedicine-for-the-treatment-of-ovarian-cancer-without-off-target-toxicity
#20
Ki Hyun Bae, Susi Tan, Atsushi Yamashita, Wei Xia Ang, Shu Jun Gao, Shu Wang, Joo Eun Chung, Motoichi Kurisawa
The green tea catechin, (-)-epigallocatechin-3-O-gallate (EGCG), has gained significant attention as a potent adjuvant to enhance the antitumor efficacy of cisplatin while mitigating its harmful side effects. Herein we report the development of a fail-safe cisplatin nanomedicine constructed with hyaluronic acid-EGCG conjugate for ovarian cancer therapy. A simple mixing of this conjugate and cisplatin induces spontaneous self-assembly of micellar nanocomplexes having a spherical core-shell structure. The surface-exposed hyaluronic acid enables efficient delivery of cisplatin into CD44-overexpressing cancer cells via receptor-mediated endocytosis whereas the internally packed EGCG moieties offer an environment favorable for the encapsulation of cisplatin...
December 2017: Biomaterials
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