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Li D, Cao D, Cui Y, Sun Y, Jiang J, Cao X. The potential of epigallocatechin gallate in the chemoprevention and therapy of hepatocellular carcinoma. Front Pharmacol 2023; 14:1201085. [PMID: 37292151 PMCID: PMC10244546 DOI: 10.3389/fphar.2023.1201085] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 05/16/2023] [Indexed: 06/10/2023] Open
Abstract
Hepatocellular carcinoma (HCC), one of the most notorious malignancies globally, has a high fatality and poor prognosis. Though remarkable breakthroughs have been made in the therapeutic strategies recently, the overall survival of HCC remains unsatisfactory. Consequently, the therapy of HCC remains a great challenge. Epigallocatechin gallate (EGCG), a natural polyphenol extracted from the leaves of the tea bush, has been extensively investigated for its antitumor effects. In this review, we summarize the previous literature to elucidate the roles of EGCG in the chemoprophylaxis and therapy of HCC. Accumulating evidence has confirmed EGCG prevents and inhibits the hepatic tumorigenesis and progression through multiple biological mechanisms, mainly involving hepatitis virus infection, oxidative stress, proliferation, invasion, migration, angiogenesis, apoptosis, autophagy, and tumor metabolism. Furthermore, EGCG enhances the efficacy and sensitivity of chemotherapy, radiotherapy, and targeted therapy in HCC. In conclusion, preclinical studies have confirmed the potential of EGCG for chemoprevention and therapy of HCC under multifarious experimental models and conditions. Nevertheless, there is an urgent need to explore the safety and efficacy of EGCG in the clinical practice of HCC.
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Affiliation(s)
- Dongming Li
- Department of Gastric and Colorectal Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Donghui Cao
- Division of Clinical Epidemiology, The First Hospital of Jilin University, Changchun, China
| | - Yingnan Cui
- Department of Gastric and Colorectal Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Yuanlin Sun
- Department of Gastric and Colorectal Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
| | - Jing Jiang
- Division of Clinical Epidemiology, The First Hospital of Jilin University, Changchun, China
| | - Xueyuan Cao
- Department of Gastric and Colorectal Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, Jilin, China
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2
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Therapeutic Effects of Green Tea Polyphenol (‒)-Epigallocatechin-3-Gallate (EGCG) in Relation to Molecular Pathways Controlling Inflammation, Oxidative Stress, and Apoptosis. Int J Mol Sci 2022; 24:ijms24010340. [PMID: 36613784 PMCID: PMC9820274 DOI: 10.3390/ijms24010340] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022] Open
Abstract
(‒)-Epigallocatechin-3-gallate (EGCG) is the most abundant polyphenol in green tea. Thanks to multiple interactions with cell surface receptors, intracellular signaling pathways, and nuclear transcription factors, EGCG possesses a wide variety of anti-inflammatory, antioxidant, antifibrotic, anti-remodelation, and tissue-protective properties which may be useful in the treatment of various diseases, particularly in cancer, and neurological, cardiovascular, respiratory, and metabolic disorders. This article reviews current information on the biological effects of EGCG in the above-mentioned disorders in relation to molecular pathways controlling inflammation, oxidative stress, and cell apoptosis.
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3
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Plant-Derived Bioactive Compounds in Colorectal Cancer: Insights from Combined Regimens with Conventional Chemotherapy to Overcome Drug-Resistance. Biomedicines 2022; 10:biomedicines10081948. [PMID: 36009495 PMCID: PMC9406120 DOI: 10.3390/biomedicines10081948] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 07/25/2022] [Accepted: 08/08/2022] [Indexed: 11/21/2022] Open
Abstract
Acquired drug resistance represents a major clinical problem and one of the biggest limitations of chemotherapeutic regimens in colorectal cancer. Combination regimens using standard chemotherapeutic agents, together with bioactive natural compounds derived from diet or plants, may be one of the most valuable strategies to overcome drug resistance and re-sensitize chemoresistant cells. In this review, we highlight the effect of combined regimens based on conventional chemotherapeutics in conjunction with well-tolerated plant-derived bioactive compounds, mainly curcumin, resveratrol, and EGCG, with emphasis on the molecular mechanisms associated with the acquired drug resistance.
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4
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Moracci L, Sensi F, Biccari A, Crotti S, Gaio E, Benetti F, Traldi P, Pucciarelli S, Agostini M. An investigation on [5 fluorouracil and epigallocatechin-3-gallate] complex activity on HT-29 cell death and its stability in gastrointestinal fluid. Oncotarget 2022; 13:476-489. [PMID: 35251495 PMCID: PMC8893781 DOI: 10.18632/oncotarget.28207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 02/17/2022] [Indexed: 12/24/2022] Open
Abstract
Recently an enhancement of the sensitivity of colorectal cancer (CRC) cells by 5-fluorouracil (5FU) due to the concurrent treatment with epigallocatechin-3-gallate (EGCG) has been found. In the present paper, to investigate on this aspect, adenocarcinoma cells HT29 were treated with 5FU, EGCG and an equimolar mixture of 5FU and EGCG ([5FU+EGCG]) and cell viability was determined. While 5FU exhibits a clear activity, EGCG alone does not express any activity. However by treating the cells with [5FU+EGCG] a strong effect of EGCG is evidenced: the sensitivity of HT29 cells to 5FU was increased by 12-fold. A simulation of the behavior of [5FU+EGCG] in different compartments of the gastrointestinal digestion model was also performed. 5FU and EGCG solubilized into a mixture of digestive fluids analyzed by mass spectrometry did not lead to signals of 5FU, EGCG and the related complex, while by diluting the solution they become detectable. On the contrary, when 5FU and EGCG are submitted to the step-by-step digestion model procedure, the analysis did not show the presence of 5FU, EGCG and [5FU+EGCG]. This behaviour could be ascribed to the instability of these compounds due to the too severe digestion conditions and/or to the complexity of the matrix which could lead in ESI conditions to the suppression of the signals of the analytes of interest.
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Affiliation(s)
- Laura Moracci
- Nano-Inspired Biomedicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy.,General Surgical Clinic 3, Department of Surgical, Oncological and Gastroentrological Sciences, University of Padua, Padova, Italy
| | - Francesca Sensi
- Nano-Inspired Biomedicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy.,Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Mestre, Venice, Italy
| | - Andrea Biccari
- Nano-Inspired Biomedicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy.,General Surgical Clinic 3, Department of Surgical, Oncological and Gastroentrological Sciences, University of Padua, Padova, Italy
| | - Sara Crotti
- Nano-Inspired Biomedicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy.,General Surgical Clinic 3, Department of Surgical, Oncological and Gastroentrological Sciences, University of Padua, Padova, Italy
| | - Elisa Gaio
- ECSIN-European Center for the Sustainable Impact of Nanotechnology, ECAMRICERT SRL, Padova, Italy
| | - Federico Benetti
- ECSIN-European Center for the Sustainable Impact of Nanotechnology, ECAMRICERT SRL, Padova, Italy
| | - Pietro Traldi
- Nano-Inspired Biomedicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy
| | - Salvatore Pucciarelli
- Nano-Inspired Biomedicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy.,General Surgical Clinic 3, Department of Surgical, Oncological and Gastroentrological Sciences, University of Padua, Padova, Italy
| | - Marco Agostini
- Nano-Inspired Biomedicine Lab, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Padova, Italy.,General Surgical Clinic 3, Department of Surgical, Oncological and Gastroentrological Sciences, University of Padua, Padova, Italy
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Hu Z, Li M, Cao Y, Akan OD, Guo T, Luo F. Targeting AMPK Signaling by Dietary Polyphenols in Cancer Prevention. Mol Nutr Food Res 2021; 66:e2100732. [PMID: 34802178 DOI: 10.1002/mnfr.202100732] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/03/2021] [Indexed: 12/14/2022]
Abstract
Cancer is a serious public health problem in the world and a major disease affecting human health. Dietary polyphenols have shown good potential in the treatment of various cancers. It is worth noting that cancer cells usually exhibit metabolic abnormalities of high glucose intake and inefficient utilization. AMPK is the key molecule in the regulation of energy metabolism and is closely related with obesity and diabetes. Recent studies indicate that AMPK also plays an important role in cancer prevention and regulating cancer-related genes and pathways, and dietary polyphenols can significantly regulate AMPK activity. In this review, the progress of dietary polyphenols preventing carcinogenesis via AMPK pathway is systemically summarized. From the viewpoint of interfering energy metabolism, the anti-cancer effects of dietary polyphenols are explained. AMPK pathway modulated by different dietary polyphenols affects pathways and target genes are summarized. Dietary polyphenols exert anti-cancer effect through the target molecules regulated by AMPK, which broadens the understanding of polyphenols anti-cancer mechanisms and provides value reference for the investigators of the novel field.
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Affiliation(s)
- Zuomin Hu
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Hunan Key Laboratory of Deeply Processing and Quality Control of Cereals and Oils, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China
| | - Mengyuan Li
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Hunan Key Laboratory of Deeply Processing and Quality Control of Cereals and Oils, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China
| | - Yunyun Cao
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Hunan Key Laboratory of Deeply Processing and Quality Control of Cereals and Oils, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China
| | - Otobong Donald Akan
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Hunan Key Laboratory of Deeply Processing and Quality Control of Cereals and Oils, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China
| | - Tianyi Guo
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Hunan Key Laboratory of Deeply Processing and Quality Control of Cereals and Oils, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China
| | - Feijun Luo
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Hunan Key Laboratory of Deeply Processing and Quality Control of Cereals and Oils, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China
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Han JH, Kim M, Kim HJ, Jang SB, Bae SJ, Lee IK, Ryu D, Ha KT. Targeting Lactate Dehydrogenase A with Catechin Resensitizes SNU620/5FU Gastric Cancer Cells to 5-Fluorouracil. Int J Mol Sci 2021; 22:ijms22105406. [PMID: 34065602 PMCID: PMC8161398 DOI: 10.3390/ijms22105406] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 02/06/2023] Open
Abstract
Resistance to anticancer therapeutics occurs in virtually every type of cancer and becomes a major difficulty in cancer treatment. Although 5-fluorouracil (5FU) is the first-line choice of anticancer therapy for gastric cancer, its effectiveness is limited owing to drug resistance. Recently, altered cancer metabolism, including the Warburg effect, a preference for glycolysis rather than oxidative phosphorylation for energy production, has been accepted as a pivotal mechanism regulating resistance to chemotherapy. Thus, we investigated the detailed mechanism and possible usefulness of antiglycolytic agents in ameliorating 5FU resistance using established gastric cancer cell lines, SNU620 and SNU620/5FU. SNU620/5FU, a gastric cancer cell harboring resistance to 5FU, showed much higher lactate production and expression of glycolysis-related enzymes, such as lactate dehydrogenase A (LDHA), than those of the parent SNU620 cells. To limit glycolysis, we examined catechin and its derivatives, which are known anti-inflammatory and anticancer natural products because epigallocatechin gallate has been previously reported as a suppressor of LDHA expression. Catechin, the simplest compound among them, had the highest inhibitory effect on lactate production and LDHA activity. In addition, the combination of 5FU and catechin showed additional cytotoxicity and induced reactive oxygen species (ROS)-mediated apoptosis in SNU620/5FU cells. Thus, based on these results, we suggest catechin as a candidate for the development of a novel adjuvant drug that reduces chemoresistance to 5FU by restricting LDHA.
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Affiliation(s)
- Jung Ho Han
- Department of Korean Medical Science, School of Korean Medicine, Pusan National University, Yangsan 50612, Korea;
- Healthy Aging Korean Medical Research Center, Pusan National University, Yangsan 50612, Korea;
| | - MinJeong Kim
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419, Korea;
| | - Hyeon Jin Kim
- Department of Molecular Biology, College of Natural Science, Busan 46241, Korea; (H.J.K.); (S.B.J.)
| | - Se Bok Jang
- Department of Molecular Biology, College of Natural Science, Busan 46241, Korea; (H.J.K.); (S.B.J.)
| | - Sung-Jin Bae
- Healthy Aging Korean Medical Research Center, Pusan National University, Yangsan 50612, Korea;
| | - In-Kyu Lee
- Department of Internal Medicine, School of Medicine Kyungpook National University, Daegu 41566, Korea;
| | - Dongryeol Ryu
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon 16419, Korea;
- Correspondence: (D.R.); (K.-T.H.)
| | - Ki-Tae Ha
- Department of Korean Medical Science, School of Korean Medicine, Pusan National University, Yangsan 50612, Korea;
- Healthy Aging Korean Medical Research Center, Pusan National University, Yangsan 50612, Korea;
- Correspondence: (D.R.); (K.-T.H.)
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7
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Samanta S. Potential Bioactive Components and Health Promotional Benefits of Tea (Camellia sinensis). J Am Coll Nutr 2020; 41:65-93. [DOI: 10.1080/07315724.2020.1827082] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Saptadip Samanta
- Department of Physiology, Midnapore College, Midnapore, West Bengal, India
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8
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Tanaka K, Tamakoshi A, Sugawara Y, Mizoue T, Inoue M, Sawada N, Matsuo K, Ito H, Naito M, Nagata C, Kitamura Y, Sadakane A, Tsugane S, Shimazu T. Coffee, green tea and liver cancer risk: an evaluation based on a systematic review of epidemiologic evidence among the Japanese population. Jpn J Clin Oncol 2020; 49:972-984. [PMID: 31790152 DOI: 10.1093/jjco/hyz097] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/07/2019] [Accepted: 06/11/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Coffee and green tea, two popular drinks in the Japanese, have recently drawn much attention as potential protective factors against the occurrence of liver cancer. METHODS We systematically reviewed epidemiologic studies on coffee, green tea and liver cancer among Japanese populations. Original data were obtained by searching the MEDLINE (PubMed) and Ichushi databases, complemented with manual searches. The evaluation was performed in terms of the magnitude of association in each study and the strength of evidence ('convincing', 'probable', 'possible', or 'insufficient'), together with biological plausibility. RESULTS We identified four cohort and four case-control studies on coffee and liver cancer and six cohort and one case-control studies on green tea and liver cancer. All cohort and case-control studies on coffee reported a weak to strong inverse association, with a summary relative risk (RR) for one cup increase being 0.72 (95% confidence interval [CI] 0.66-0.79). Conversely, all studies but two cohort studies on green tea reported no association, with a corresponding summary RR of 0.99 (95% CI 0.97-1.01, P = 0.37). CONCLUSION Coffee drinking 'probably' decreases the risk of primary liver cancer among the Japanese population whereas the evidence on an association between green tea and liver cancer is 'insufficient' in this population.
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Affiliation(s)
- Keitaro Tanaka
- Department of Preventive Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Akiko Tamakoshi
- Department of Public Health, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Yumi Sugawara
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai, Japan
| | - Tetsuya Mizoue
- Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan
| | - Manami Inoue
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan
| | - Norie Sawada
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan
| | - Keitaro Matsuo
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan
| | - Hidemi Ito
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan
| | - Mariko Naito
- Department of Oral Epidemiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Chisato Nagata
- Department of Epidemiology and Preventive Medicine, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Yuri Kitamura
- Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Atsuko Sadakane
- Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan
| | - Shoichiro Tsugane
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan
| | - Taichi Shimazu
- Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan
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Liu C, Li P, Qu Z, Xiong W, Liu A, Zhang S. Advances in the Antagonism of Epigallocatechin-3-gallate in the Treatment of Digestive Tract Tumors. Molecules 2019; 24:molecules24091726. [PMID: 31058847 PMCID: PMC6539113 DOI: 10.3390/molecules24091726] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/24/2019] [Accepted: 04/30/2019] [Indexed: 12/12/2022] Open
Abstract
Due to changes in the dietary structure of individuals, the incidence of digestive tract tumors has increased significantly in recent years, causing a serious threat to the life and health of patients. This has in turn led to an increase in cancer prevention research. Many studies have shown that epigallocatechin-3-gallate (EGCG), an active ingredient in green tea, is in direct contact with the digestive tract upon ingestion, which allows it to elicit a significant antagonizing effect on digestive tract tumors. The main results of EGCG treatment include the prevention of tumor development in the digestive tract and the induction of cell cycle arrest and apoptosis. EGCG can be orally administered, is safe, and combats other resistances. The synergistic use of cancer drugs can promote the efficacy and reduce the anti-allergic properties of drugs, and is thus, favored in medical research. EGCG, however, currently possesses several shortcomings such as poor stability and low bioavailability, and its clinical application prospects need further development. In this paper, we have systematically summarized the research progress on the ability of EGCG to antagonize the activity and mechanism of action of digestive tract tumors, to achieve prevention, alleviation, delay, and even treat human gastrointestinal tract tumors via exogenous dietary EGCG supplementation or the development of new drugs containing EGCG.
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Affiliation(s)
- Changwei Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China.
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, China.
| | - Penghui Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China.
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, China.
| | - Zhihao Qu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China.
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, China.
| | - Wei Xiong
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha 410078, China.
| | - Ailing Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China.
| | - Sheng Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China.
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha 410128, China.
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10
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La X, Zhang L, Li Z, Li H, Yang Y. (-)-Epigallocatechin Gallate (EGCG) Enhances the Sensitivity of Colorectal Cancer Cells to 5-FU by Inhibiting GRP78/NF-κB/miR-155-5p/MDR1 Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:2510-2518. [PMID: 30741544 DOI: 10.1021/acs.jafc.8b06665] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Green tea accounts for approximately 20% of the world's total tea yield. (-)-Epigallocatechin gallate (EGCG) is an active catechin in green tea, which suppresses tumor growth and enhances drug sensitivity in various cancers, but the molecular mechanism is still unclear. Chemotherapy drugs, such as 5-fluorouracil (5-FU), are a common strategy for clinical treatment of cancer patients; however, the lower response rate caused by prolonged use becomes the main reason for tumor recurrence. Therefore, discovering a safe and effective chemo-sensitizer is an urgent task required to be solved. Here, we report that EGCG reinforces the sensitivity of colon cancer cells to 5-FU, and the IC50 values of 5-FU is decreased from 40 ± 4.2 μM to 5 ± 0.36 μM in one human colon carcinoma cell line-HCT-116, and from 150 ± 6.4 μM to 11 ± 0.96 μM in the other human colon carcinoma cell line-DLD1 when these cells are cotreated with 50 μM EGCG. Consistently, compared to 5-FU or EGCG treatment alone, the combination of both significantly promotes cancer cell apoptosis and DNA damage. Further mechanism research reveals that treatment of colorectal cancer (CRC) with 50 μM EGCG inhibits GRP78 expression, activates the NF-κB (2.55 ± 0.05-fold for HCT-116 and 2.27 ± 0.08-fold for DLD1) pathway, and enhances miR-155-5p (2.12 ± 0.02-fold for HCT-116 and 2.01 ± 0.01-fold for DLD1) level. The elevated miR-155-5p strongly suppresses target gene MDR1 expression, which blocks the efflux of 5-FU. The accumulation of 5-FU resulted in caspase-3 and PARP activation, Bcl-2 reduction, and Bad increase, which ultimately lead to cancer cell apoptosis. Overall, our data show that EGCG may be act as a novel chemo-sensitizer, and the GRP78/NF-κB/miR-155-5p/MDR1 pathway plays a vital role in EGCG enhancing the sensitivity of colorectal cancer to 5-FU.
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Affiliation(s)
- Xiaoqin La
- Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education , Shanxi University , Taiyuan 030006 , China
| | - Lichao Zhang
- Institutes of Biomedical Sciences , Shanxi University , Taiyuan 030006 , China
| | - Zhuoyu Li
- Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education , Shanxi University , Taiyuan 030006 , China
- Institutes of Biomedical Sciences , Shanxi University , Taiyuan 030006 , China
- School of Life Science , Shanxi University , Taiyuan 030006 , China
| | - Hanqing Li
- School of Life Science , Shanxi University , Taiyuan 030006 , China
| | - Yufei Yang
- Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education , Shanxi University , Taiyuan 030006 , China
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11
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Combination of 5-Florouracil and polyphenol EGCG exerts suppressive effects on oral cancer cells exposed to radiation. Arch Oral Biol 2019; 101:8-12. [PMID: 30851692 DOI: 10.1016/j.archoralbio.2019.02.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 02/03/2019] [Accepted: 02/27/2019] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Natural compounds such as epigallocatechin-3-gallate (EGCG) have previously shown chemotherapeutic properties with few side-effects. In our study, we evaluated the effects of combining EGCG with 5-fluorouracil (5-FU) and radiotherapy on oral squamous cell cancer. We evaluated whether the combination of lower doses of 5-FU with EGCG could be equally or more effective than the use of higher doses of 5-FU alone. METHODS Cell viability, migration and cell cycles were assayed in oral cancer cell lines treated with 5-FU, 5-FU + EGCG and radiation (0, 2.5 and 5 Gy). RESULTS This study found that the combination of EGCG with 5-FU reduced cell viability and migration distance compared to control samples and the same dose of 5-FU alone. Addition of EGCG increased the number of cells in the G2/M phase, while 5-FU arrested the cell cycle in phase S. Moreover, cell exposure to 5 Gy radiation decreased the effects of combining with EGCG. CONCLUSIONS In summary, the combination of EGCG and 5-FU reduced both cell viability and migration as well as altered the cell cycle to a greater extent than 5-FU alone.
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12
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Bimonte S, Albino V, Piccirillo M, Nasto A, Molino C, Palaia R, Cascella M. Epigallocatechin-3-gallate in the prevention and treatment of hepatocellular carcinoma: experimental findings and translational perspectives. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:611-621. [PMID: 30858692 PMCID: PMC6387605 DOI: 10.2147/dddt.s180079] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Hepatocellular carcinoma (HCC), a primary liver malignancy, is one of the deadliest cancers worldwide. Despite orthotopic liver transplantation and hepatic resection representing the principal lines of treatment for this pathology, only a minority of patients can be resected owing to cirrhosis or late diagnosis. Keeping in mind the end goal of conquering these challenges, new alternative approaches have been proposed. Accumulating evidence has demonstrated that epigallocatechin-3-gallate (EGCG), the principal catechin of green tea with multiple biological properties, is able to modulate different molecular mechanisms underlying HCC, mainly through its antioxidant activity. In this article, we revise these findings reported in the literature, in order to highlight the potential roles of EGCG in the treatment of HCC. The CAMARADES criteria were applied for quality assessment of animal studies, and a narrative synthesis performed. New bits of information available for translational perspectives into clinical practice are addressed.
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Affiliation(s)
- Sabrina Bimonte
- Division of Anesthesia and Pain Medicine, Istituto Nazionale Tumori, IRCCS - Fondazione G Pascale, Naples, Italy,
| | - Vittorio Albino
- Division of Hepatobiliary Surgical Oncology, Istituto Nazionale Tumori, IRCCS - Fondazione G Pascale, Naples, Italy
| | - Mauro Piccirillo
- Division of Hepatobiliary Surgical Oncology, Istituto Nazionale Tumori, IRCCS - Fondazione G Pascale, Naples, Italy
| | - Aurelio Nasto
- UOC Chirurgia Generale ad Indirizzo Oncologico, POA Tortora, Pagani, Salerno, Italy
| | - Carlo Molino
- A Cardarelli Chirurgia Generale - AORN, Naples, Italy
| | - Raffaele Palaia
- Division of Hepatobiliary Surgical Oncology, Istituto Nazionale Tumori, IRCCS - Fondazione G Pascale, Naples, Italy
| | - Marco Cascella
- Division of Anesthesia and Pain Medicine, Istituto Nazionale Tumori, IRCCS - Fondazione G Pascale, Naples, Italy,
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13
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Morris J, Moseley VR, Cabang AB, Coleman K, Wei W, Garrett-Mayer E, Wargovich MJ. Reduction in promotor methylation utilizing EGCG (epigallocatechin-3-gallate) restores RXRα expression in human colon cancer cells. Oncotarget 2018; 7:35313-26. [PMID: 27167203 PMCID: PMC5085231 DOI: 10.18632/oncotarget.9204] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 04/16/2016] [Indexed: 12/16/2022] Open
Abstract
Silencing of regulatory genes through hypermethylation of CpG islands is an important mechanism in tumorigenesis. In colon cancer, RXRα, an important dimerization partner with other nuclear transcription factors, is silenced through this mechanism. We previously found that colon tumors in ApcMin/+ mice had diminished levels of RXRα protein and expression levels of this gene were restored by treatment with a green tea intervention, due to reduced promoter methylation of RXRα. We hypothesized that CIMP+ cell lines, which epigenetically silence key regulatory genes would also evidence silencing of RXRα and EGCG treatment would restore its expression. We indeed found EGCG to restore RXRα activity levels in the human cell lines, in a dose dependent manner and reduced RXRα promoter methylation. EGCG induced methylation changes in several other colon cancer related genes but did not cause a decrease in global methylation. Numerous epidemiological reports have shown the benefits of green tea consumption in reducing colon cancer risk but to date no studies have shown that the risk reduction may be related to the epigenetic restoration by tea polyphenols. Our results show that EGCG modulates the reversal of gene silencing involved in colon carcinogenesis providing a possible avenue for colon cancer prevention and treatment.
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Affiliation(s)
- Jay Morris
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Vondina R Moseley
- Department of Cell & Molecular Pharmacology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - April B Cabang
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Katie Coleman
- Department of Cell & Molecular Pharmacology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Wei Wei
- Department of Public Health Science, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Elizabeth Garrett-Mayer
- Department of Biostatistics & Epidemiology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Michael J Wargovich
- Department of Molecular Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
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Yuan L, Liu M, Sun B, Liu J, Wei X, Wang Z, Wang B, Han J. Calorimetric and spectroscopic studies on the competitive behavior between (−)-epigallocatechin-3-gallate and 5-fluorouracil with human serum albumin. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.10.049] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Lee KC, Lin CT, Chang SF, Chen CN, Liu JL, Huang WS. Effect of AICAR and 5-Fluorouracil on X-ray Repair, Cross-Complementing Group 1 Expression, and Consequent Cytotoxicity Regulation in Human HCT-116 Colorectal Cancer Cells. Int J Mol Sci 2017; 18:ijms18112363. [PMID: 29117108 PMCID: PMC5713332 DOI: 10.3390/ijms18112363] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 11/06/2017] [Accepted: 11/06/2017] [Indexed: 02/07/2023] Open
Abstract
Colorectal cancer (CRC) is one of the leading causes of cancer mortality and 5-Fluorouracil (5-FU) is the most common chemotherapy agent of CRC. A high level of X-ray repair cross complementing group 1 (XRCC1) in cancer cells has been associated with the drug resistance occurrence. Moreover, the activation of adenosine monophosphate (AMP)-activated protein kinase (AMPK) has been indicated to regulate the cancer cell survival. Thus, this study was aimed to examine whether XRCC1 plays a role in the 5-FU/AMPK agonist (AICAR)-induced cytotoxic effect on CRC and the underlying mechanisms. Human HCT-116 colorectal cells were used in this study. It was shown that 5-FU increases the XRCC1 expression in HCT-116 cells and then affects the cell survival through CXCR4/Akt signaling. Moreover, 5-FU combined with AICAR further result in more survival inhibition in HCT-116 cells, accompanied with reduced CXCR4/Akt signaling activity and XRCC1 expression. These results elucidate the role and mechanism of XRCC1 in the drug resistance of HCT-116 cells to 5-FU. We also demonstrate the synergistic inhibitory effect of AMPK on 5-FU-inhibited HCT-116 cell survival under the 5-FU and AICAR co-treatment. Thus, our findings may provide a new notion for the future drug regimen incorporating 5-FU and AMPK agonists for the CRC treatment.
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Affiliation(s)
- Ko-Chao Lee
- Department of Colorectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Kaohsiung 833, Taiwan.
| | - Chien-Tsong Lin
- Center for General Education, National Formosa University, Yunlin 632, Taiwan.
- Department of Wood Based Materials and Design, National Chiayi University, Chiayi 600, Taiwan.
| | - Shun-Fu Chang
- Department of Medical Research and Development, Chang Gung Memorial Hospital Chiayi Branch, Chiayi 613, Taiwan.
| | - Cheng-Nan Chen
- Department of Biochemical Science and Technology, National Chiayi University, Chiayi 600, Taiwan.
| | - Jing-Lan Liu
- Department of Pathology, Chang Gung Memorial Hospital Chiayi Branch, Chiayi 600, Taiwan.
| | - Wen-Shih Huang
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
- Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Chiayi 613, Taiwan.
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16
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Ni CX, Gong H, Liu Y, Qi Y, Jiang CL, Zhang JP. Green Tea Consumption and the Risk of Liver Cancer: A Meta-Analysis. Nutr Cancer 2017; 69:211-220. [PMID: 28095030 DOI: 10.1080/01635581.2017.1263754] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Green tea is a commonly consumed beverage in Asia and has been suggested to have anticarcinogenic properties. To date, epidemiological evidence of the effect of green tea consumption on liver cancer risk remains ambiguous. The aim of this meta-analysis is to evaluate the association between green tea consumption and the risk of liver cancer. The summary relative risk for the highest consumption (≥5 cups/day) of green tea on liver cancer incidence compared with nondrinkers was 0.62 (95% confidence interval: 0.49-0.79). We also found a trend that the incidence of liver cancer was reduced with the increasing years of green tea intake (significance at >20 yr). A significant dose-response association was found between green tea drinking and liver cancer risk. The downward trend was most obvious when the consumption of green tea increased up to about 4 cups/day. The results showed that the increasing green tea intake may have a preventive effect against liver cancer.
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Affiliation(s)
- Chen-Xu Ni
- a Department of Pharmacy , Shanghai Tenth People's Hospital, Tongji University School of Medicine , Shanghai , China.,b College of Pharmacy, Second Military Medical University , Shanghai , China
| | - Hong Gong
- c Laboratory of Stress Medicine , Faculty of Psychology and Mental Health, Second Military Medical University , Shanghai , China
| | - Ying Liu
- d Department of Pharmacy , Dongfang Hospital , Shanghai , China
| | - Yang Qi
- b College of Pharmacy, Second Military Medical University , Shanghai , China
| | - Chun-Lei Jiang
- c Laboratory of Stress Medicine , Faculty of Psychology and Mental Health, Second Military Medical University , Shanghai , China
| | - Jun-Ping Zhang
- b College of Pharmacy, Second Military Medical University , Shanghai , China
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17
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Cao J, Han J, Xiao H, Qiao J, Han M. Effect of Tea Polyphenol Compounds on Anticancer Drugs in Terms of Anti-Tumor Activity, Toxicology, and Pharmacokinetics. Nutrients 2016; 8:nu8120762. [PMID: 27983622 PMCID: PMC5188417 DOI: 10.3390/nu8120762] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 11/17/2016] [Accepted: 11/21/2016] [Indexed: 12/16/2022] Open
Abstract
Multidrug resistance and various adverse side effects have long been major problems in cancer chemotherapy. Recently, chemotherapy has gradually transitioned from mono-substance therapy to multidrug therapy. As a result, the drug cocktail strategy has gained more recognition and wider use. It is believed that properly-formulated drug combinations have greater therapeutic efficacy than single drugs. Tea is a popular beverage consumed by cancer patients and the general public for its perceived health benefits. The major bioactive molecules in green tea are catechins, a class of flavanols. The combination of green tea extract or green tea catechins and anticancer compounds has been paid more attention in cancer treatment. Previous studies demonstrated that the combination of chemotherapeutic drugs and green tea extract or tea polyphenols could synergistically enhance treatment efficacy and reduce the adverse side effects of anticancer drugs in cancer patients. In this review, we summarize the experimental evidence regarding the effects of green tea-derived polyphenols in conjunction with chemotherapeutic drugs on anti-tumor activity, toxicology, and pharmacokinetics. We believe that the combination of multidrug cancer treatment with green tea catechins may improve treatment efficacy and diminish negative side effects.
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Affiliation(s)
- Jianhua Cao
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Jie Han
- Analytical Center, Beijing Normal University, Beijing 100875, China.
| | - Hao Xiao
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Jinping Qiao
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Mei Han
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China.
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18
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Tang B, Tang F, Wang Z, Qi G, Liang X, Li B, Yuan S, Liu J, Yu S, He S. Upregulation of Akt/NF-κB-regulated inflammation and Akt/Bad-related apoptosis signaling pathway involved in hepatic carcinoma process: suppression by carnosic acid nanoparticle. Int J Nanomedicine 2016; 11:6401-6420. [PMID: 27942213 PMCID: PMC5138024 DOI: 10.2147/ijn.s101285] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Primary liver cancer is globally the sixth most frequent cancer, and the second leading cause of cancer death and its incidence is increasing in many countries, becoming a serious threat to human health. Many researches focused on the treatment and prevention of liver cancer. However, due to the underlying molecular mechanism of liver cancer still not fully understood, the studies and development of treatments were forced to be delayed. Akt has been suggested to play an essential role in the progression of inflammation response and apoptosis. Hence, in this study, Akt-knockout mice and cells of liver cancer were used as a model to investigate the molecular mechanism of Akt-associated inflammatory and apoptotic signaling pathway linked with NF-κB and Bcl-2-associated death promoter (Bad) for the progression of liver cancer. Carnosic acid (CA), as a phenolic diterpene with anticancer, antibacterial, antidiabetic, as well as neuroprotective properties, is produced by many species from Lamiaceae family. Administration of CA nanoparticles was sufficient to lead to considerable inhibition of liver cancer progression. The results indicated that, compared to the normal liver cells, the expression of Akt was significantly higher in liver cancer cell lines. Also, we found that Akt-knockout cancer cell lines modulated inflammation response and apoptosis via inhibiting NF-κB activation and inducing apoptotic reaction. Our results indicated that the downstream signals, including cytokines regulated by NF-κB and caspase-3-activated apoptosis affected by Bad, were re-modulated for knockout of Akt. And CA nanoparticles, acting as Akt-knockout, could inhibit inflammation and accelerate apoptosis in liver cancer by altering NF-κB activation and activating caspase-3 through Bad pathway. These findings demonstrated that the nanoparticulate drug CA performed its effective role owing to its ability to reduce inflammatory action and enhance apoptosis for the overexpression of NF-κB and Bad via Akt signaling pathway, playing a direct role in liver cancer progression. Thus, nanoparticle CA might be an important and potential choice for the clinical treatment in the future.
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Affiliation(s)
- Bo Tang
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
| | - Fang Tang
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
| | - Zhenran Wang
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
| | - Guangying Qi
- Department of Pathology and Physiopathology, Guilin Medical University, Guilin, Guangxi, People's Republic of China
| | - Xingsi Liang
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
| | - Bo Li
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
| | - Shengguang Yuan
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
| | - Jie Liu
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
| | - Shuiping Yu
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
| | - Songqing He
- Department of Hepatobiliary Surgery, Guilin Medical University Affiliated Hospital; Laboratory of Liver Injury and Repair Molecular Medicine, Guilin Medical University
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The effect of JAK2 knockout on inhibition of liver tumor growth by inducing apoptosis, autophagy and anti-proliferation via STATs and PI3K/AKT signaling pathways. Biomed Pharmacother 2016; 84:1202-1212. [PMID: 27788478 DOI: 10.1016/j.biopha.2016.09.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 09/11/2016] [Accepted: 09/12/2016] [Indexed: 02/07/2023] Open
Abstract
Liver cancer is a leading cause of cancer death, making it as the second most common cause for death from cancer globally. Though many studies before have explored a lot for liver cancer prevention and treatment, there are still a lot far from to know based on the molecular mechanisms. Janus kinase 2 (JAK2) has been reported to play an essential role in the progression of apoptosis, autophagy and proliferation for cells. Therefore, we were aimed to investigate the underlying mechanisms by which JAK2 performed its role in ameliorating liver cancer. JAK2 knockout liver cancer cell lines were involved for our experiments in vitro and in vivo. Western blotting, quantitative RT-PCR (qRT-PCR), ELISA, Immunohistochemistry, and flow-cytometric analysis were used to determine the key signaling pathway regulated by JAK2 for liver cancer progression. Data here indicated that JAK2, indeed, expressed highly in cancer cell lines compared to the normal liver cells. And apoptosis and autophagy were found in JAK2 knockout liver cancer cells through activating Caspase-3, Cyclin-D1 and mTOR regulated by STAT3/5 and PI3K/AKT signaling pathway. And also, the liver cancer cells proliferation was inhibited. In addition, tumor size and weight were reduced by knockout of JAK2 in vivo experiments. These findings demonstrated that JAK2 and its down-streaming signaling pathways play a direct role in the progression of liver cancer possibly. To our knowledge, it was the first time to evaluate the role of JAK2 knockout in improving liver cancer from apoptosis, autophagy and proliferation, which could be a potential target for future therapeutic approach clinically.
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20
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Hu B, Sun M, Liu J, Hong G, Lin Q. The preventative effect of Akt knockout on liver cancer through modulating NF-κB-regulated inflammation and Bad-related apoptosis signaling pathway. Int J Oncol 2016; 48:1467-76. [PMID: 26892230 DOI: 10.3892/ijo.2016.3383] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 12/17/2015] [Indexed: 11/06/2022] Open
Abstract
Primary liver cancer is globally the sixth most frequent cancer, and the second leading cause of cancer death and its incidence is increasing in many countries, thus, becoming serious threat to human health. Substantial research has focused on the treatment and prevention of liver cancer. However, the underlying molecular mechanism of liver cancer are still not fully understood, and therefore development of treatments are delayed. Akt has been suggested to play an essential role in the progression of inflammation response and apoptosis. Hence, in the present study, Akt knockout mice and cell lines were used as a model to investigate the molecular mechanism of Akt-associated inflammatory and apoptotic signaling pathway with NF-κB and Bad in the progression of liver cancer. Western blotting, quantitative RT-PCR (qRT-PCR), immunohistochemistry, ELISA and flow cytometric analysis were used to determine the key signaling pathway in the development of liver cancer. The results indicated that, compared to the normal liver cells, the expression of Akt was significantly higher in liver cancer cell lines. In addition, Akt-knockout liver cancer cells showed lower Akt expression. we also, found that Akt-knockout cancer cell lines modulated inflammation response and apoptosis via inhibiting NF-κB expression and suppressing apoptotic activation. Our results indicated that the downstream signals, including cytokines regulated by NF-κB signaling pathway and caspase-3-activated apoptosis affected by Bad were downregulated for knockout of Akt. These findings demonstrated that Akt is related to NF-κB and Bad signaling pathway possibly playing a direct role in the progression of liver cancer. Thus, Akt might be an important and potential treatment choice for the clinical diagnosis and treatment in the future.
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Affiliation(s)
- Bin Hu
- Department of Laboratory Medicine, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Ming Sun
- Department of Reproductive Medicine, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Jiajun Liu
- Department of Infectious Diseases, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Guolin Hong
- Department of Laboratory Medicine, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
| | - Qin Lin
- Department of Radiation Oncology, Reproductive Medicine, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
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Niu J, Lin Y, Guo Z, Niu M, Su C. The Epidemiological Investigation on the Risk Factors of Hepatocellular Carcinoma: A Case-Control Study in Southeast China. Medicine (Baltimore) 2016; 95:e2758. [PMID: 26871825 PMCID: PMC4753921 DOI: 10.1097/md.0000000000002758] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Incidence of hepatocellular carcinoma (HCC) ranked the fifth in male and ninth in the female counterparts, and 50% of incidence HCC cases were occurred in China with high hepatitis B virus (HBV) prevalence. HCC has seriously compromised the health status of general population in China. A case-control study of 314 HCC cases and 346 controls was conducted in Xiamen, which is an epidemic area in China for both hepatitis B infection and HCC. Face-to-face interview was conducted to gather information on demographic characteristics as well as exposure of environmental factors. Commercial enzyme-linked immunosorbent assay kits were used to determine the status of serological markers of HBV infection. Odds ratios and 95% confidence intervals were estimated by using unconditional logistic regression. Multivariate unconditional logistic regression analysis was applied to evaluate the potential interactions of variables or confounders.As expected, HBV and alcohol intake still are the major risk factors of HCC. Liver disease history and passive smoking are also associated with elevated HCC risk. Indoor air pollution and pesticide exposure have newly identified as risk factors of HCC. Fruit and tea intake can significantly lower the HCC risk.The application of HBV vaccine and reduction on alcohol intake should be further promoted in high-risk population. Fruit and tea can be served as chemoprevention in daily life due to their high accessibility.
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Affiliation(s)
- Jianjun Niu
- From the Zhongshan Hospital, Xiamen University (JN); Xiamen Center for Disease Control and Prevention (YL, ZG, MN, CS); and School of Public Health, Xiamen University, Xiamen, Fujian Province, People's Republic of China (CS)
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22
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Carranza-Torres IE, Guzmán-Delgado NE, Coronado-Martínez C, Bañuelos-García JI, Viveros-Valdez E, Morán-Martínez J, Carranza-Rosales P. Organotypic culture of breast tumor explants as a multicellular system for the screening of natural compounds with antineoplastic potential. BIOMED RESEARCH INTERNATIONAL 2015; 2015:618021. [PMID: 26075250 PMCID: PMC4449881 DOI: 10.1155/2015/618021] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 02/23/2015] [Accepted: 03/02/2015] [Indexed: 01/11/2023]
Abstract
Breast cancer is the leading cause of death in women worldwide. The search for novel compounds with antitumor activity, with less adverse effects and higher efficacy, and the development of methods to evaluate their toxicity is an area of intense research. In this study we implemented the preparation and culture of breast tumor explants, which were obtained from precision-cut breast tumor slices. In order to validate the model we are proposing to screen antineoplastic effect of natural compounds, we selected caffeic acid, ursolic acid, and rosmarinic acid. Using the Krumdieck tissue slicer, precision-cut tissue slices were prepared from breast cancer samples; from these slices, 4 mm explants were obtained and incubated with the selected compounds. Viability was assessed by Alamar Blue assay, LDH release, and histopathological criteria. Results showed that the viability of the explants cultured in the presence of paclitaxel (positive control) decreased significantly (P < 0.05); however, tumor samples responded differently to each compound. When the explants were coincubated with paclitaxel and compounds, a synergic effect was observed. This study shows that ex vivo culture of breast cancer explants offers a suitable alternative model for evaluating natural or synthetic compounds with antitumor properties within the complex microenvironment of the tumor.
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Affiliation(s)
- Irma Edith Carranza-Torres
- Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, 64720 Monterrey, NL, Mexico
- Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, 64460 San Nicolás de los Garza, NL, Mexico
| | - Nancy Elena Guzmán-Delgado
- Unidad Médica de Alta Especialidad No. 34, Instituto Mexicano del Seguro Social, 64730 Monterrey, NL, Mexico
| | - Consuelo Coronado-Martínez
- Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, 64720 Monterrey, NL, Mexico
| | | | - Ezequiel Viveros-Valdez
- Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, 64460 San Nicolás de los Garza, NL, Mexico
| | | | - Pilar Carranza-Rosales
- Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, 64720 Monterrey, NL, Mexico
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Epigallocatechin-3-gallate enhances the therapeutic effects of leptomycin B on human lung cancer a549 cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:217304. [PMID: 25922640 PMCID: PMC4397486 DOI: 10.1155/2015/217304] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 03/16/2015] [Accepted: 03/17/2015] [Indexed: 12/20/2022]
Abstract
Our previous studies have shown Leptomycin B (LMB) is a promising antilung cancer drug. Epigallocatechin-3-gallate (EGCG) has antitumor properties but a debatable clinical application. The objective of this study is to evaluate the combination therapeutic effect of LMB and EGCG and its molecular mechanisms in human lung cancer A549 cells. Increased cytotoxicity was observed in LMB+EGCG-treated cells compared to LMB-treated cells. Elevated ROS was maximized 2 h after treatment, and LMB+EGCG-treated cells had higher ROS levels compared to LMB. N-Acetyl-L-cysteine (NAC) studies confirmed the oxidative role of LMB and/or EGCG treatment. In comparison to the control, CYP3A4, SOD, GPX1, and p21 mRNA expression levels were increased 7.1-, 2.0-, 4.6-, and 13.1-fold in LMB-treated cells, respectively, while survivin was decreased 42.6-fold. Additionally, these increases of CYP3A4, SOD, and GPX1 were significantly reduced, while p21 was significantly increased in LMB+EGCG-treated cells compared to LMB-treated cells. The qRT-PCR results for p21 and survivin were further confirmed by Western blot. Our study first shows that LMB produces ROS and is possibly metabolized by CYP3A4, GPX1, and SOD in A549 cells, and combination treatment of LMB and EGCG augments LMB-induced cytotoxicity through enhanced ROS production and the modulation of drug metabolism and p21/survivin pathways.
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Fujiki H, Sueoka E, Watanabe T, Suganuma M. Synergistic enhancement of anticancer effects on numerous human cancer cell lines treated with the combination of EGCG, other green tea catechins, and anticancer compounds. J Cancer Res Clin Oncol 2014; 141:1511-22. [PMID: 25544670 DOI: 10.1007/s00432-014-1899-5] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 12/17/2014] [Indexed: 01/08/2023]
Abstract
PURPOSE In 2008, we reported that 10 Japanese-size cups of green tea daily, supplemented with tablets of green tea extract (GTE), reduced the recurrence of colorectal adenoma by 51.6% in patients after polypectomy. Based on these results, we paid special attention to Japanese cancer patients, who consume green tea every day and are administered anticancer drugs. This encouraged us to study whether the combination of green tea catechins and anticancer drugs has the potential to enhance the efficacy of the drugs. RESULTS AND DISCUSSION The combination of GTE and NSAIDs synergistically inhibited tumor development in rodents through the activation of the GADD153-DR5-TRAIL apoptotic pathway. Since then, this study was further extended by various investigators to the combinations of EGCG and other green tea catechins with anticancer compounds, the latter of which include NSAIDs, phytochemicals, and anticancer drugs. In order to demonstrate whether diversity of the combinations would generally induce synergistic anticancer effects on numerous human cancer cell lines, we studied the results of 42 in vitro combination experiments and the synergistic inhibition of tumor volume of 13 combination experiments using xenograft mouse models, which were previously reported by other investigators. The various combinations of EGCG and anticancer compounds induced similar synergistic anticancer effects for both in vitro and in vivo experiments, and showed an average reduction in tumor volume by 70.3%. Considering the evidence showing that treatment with EGCG inhibited self-renewal of cancer stem cells, the combination shows a great advantage. CONCLUSION Green tea is a cancer preventive for humans, showing a new trend of green tea catechins as synergists with anticancer compounds.
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Affiliation(s)
- Hirota Fujiki
- Department of Clinical Laboratory Medicine, Faculty of Medicine, Saga University, Nabeshima, Saga, 849-8501, Japan,
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25
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Kim KC, Lee C. Reversal of Cisplatin resistance by epigallocatechin gallate is mediated by downregulation of axl and tyro 3 expression in human lung cancer cells. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2014; 18:61-6. [PMID: 24634598 PMCID: PMC3951825 DOI: 10.4196/kjpp.2014.18.1.61] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 12/08/2013] [Accepted: 12/27/2013] [Indexed: 01/23/2023]
Abstract
Lung cancer is still the number one cause of death from cancer worldwide. The clinical effect of platinum-based chemotherapy for non-small cell lung cancer is constrained by the resistance to drug. To overcome chemo-resistance, various modified treatment including combination therapy has been used, but overall survival has not been improved yet. In this study, chemo-resistant lung cancer cells, A549/Cis and H460/Cis, were developed by long-term exposure of cells to cisplatin and the proliferative capability of these resistant cells was verified to be reduced. We found cytotoxic effect of epigallocatechin gallate (EGCG), a major catechin derived from green tea, on both the parental lung cancer cells, A549 and H460, and their cisplatin resistant cells, A549/Cis and H460/Cis. ELISA and Western blot analysis revealed that EGCG was able to increase interlukine-6 (IL-6) production per cell, whereas its downstream effector Signal transducers and activators of transcription 3 (STAT3) phosphorylation was not changed by EGCG, indicating that IL-6/STAT3 axis is not the critical signaling to be inhibited by EGCG. We next found that EGCG suppresses the expression of both Axl and Tyro 3 receptor tyrosine kinases at mRNA and protein level, explaining the cytotoxic effect of EGCG on lung cancer cells, especially, regardless of cisplatin resistance. Taken together, these data suggest that EGCG impedes proliferation of lung cancer cells including their chemo-resistant variants through downregulation of Axl and Tyro 3 expression.
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Affiliation(s)
- Kyung-Chan Kim
- Department of Internal Medicine, College of Medicine, Catholic University of Daegu, Daegu 705-718, Korea
| | - Chuhee Lee
- Department of Biochemistry and Molecular Biology, School of Medicine, Yeungnam University, Daegu 705-717, Korea
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Maruyama T, Murata S, Nakayama K, Sano N, Ogawa K, Nowatari T, Tamura T, Nozaki R, Fukunaga K, Ohkohchi N. (-)-Epigallocatechin-3-gallate suppresses liver metastasis of human colorectal cancer. Oncol Rep 2013; 31:625-33. [PMID: 24337301 DOI: 10.3892/or.2013.2925] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 11/11/2013] [Indexed: 12/18/2022] Open
Abstract
(-)-Epigallocatechin-3-gallate (EGCG), the major constituent of green tea, has been shown to inhibit cell proliferation and induce apoptosis in several types of human tumors. The most common site of distant metastases in colorectal cancer is the liver. However, no previous studies have reported the ability of EGCG to suppress liver metastases of human colorectal cancer. The aim of the present study was to elucidate the potential use of EGCG as chemotherapy targeting liver metastases of human colorectal cancer. To assess the effect of EGCG on human colorectal cancer cell lines, RKO and HCT116, cell viability, cell proliferation and apoptosis were measured by cell counting kit-8, BrdU assay and TUNEL staining, respectively. Protein and gene expression were measured by western blot analysis and RT-PCR analysis, respectively. EGCG inhibited cell proliferation and induced apoptosis. EGCG dephosphorylated constitutively activated Akt and increased the activation of p38. EGCG also decreased the expression of vascular endothelial growth factor receptor 2. Additionally, the ability of EGCG to prevent the development of liver metastases of RKO tumors was evaluated in SCID mice. EGCG suppressed angiogenesis and induced apoptosis in liver metastases without associated body weight loss or hepatotoxicity. Furthermore, the liver metastatic area was significantly reduced by EGCG administration. Our findings indicate that EGCG may be useful in the treatment of liver metastases of human colorectal cancer.
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Affiliation(s)
- Takehito Maruyama
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Soichiro Murata
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Ken Nakayama
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Naoki Sano
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Koichi Ogawa
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Takeshi Nowatari
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Takafumi Tamura
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Reiji Nozaki
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Kiyoshi Fukunaga
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Nobuhiro Ohkohchi
- Department of Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
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Lambert JD. Does tea prevent cancer? Evidence from laboratory and human intervention studies. Am J Clin Nutr 2013; 98:1667S-1675S. [PMID: 24172300 DOI: 10.3945/ajcn.113.059352] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Tea (Camellia sinensis) is a widely consumed beverage and has been extensively studied for its cancer-preventive activity. Both the polyphenolic constituents as well as the caffeine in tea have been implicated as potential cancer-preventive compounds; the relative importance seems to depend on the cancer type. Green tea and the green tea catechin have been shown to inhibit tumorigenesis at a number of organ sites and to be effective when administered either during the initiation or postinitiation phases of carcinogenesis. Black tea, although not as well studied as green tea, has also shown cancer-preventive effects in laboratory models. A number of potential mechanisms have been proposed to account for the cancer-preventive effects of tea, including modulation of phase II metabolism, alterations in redox environment, inhibition of growth factor signaling, and others. In addition to the laboratory studies, there is a growing body of human intervention studies suggesting that tea can slow cancer progression and modify biomarkers relevant to carcinogenesis. Although available data are promising, many questions remain with regard to the dose-response relations of tea constituents in various models, the primary mechanisms of action, and the potential for combination chemoprevention strategies that involve tea as well as other dietary or pharmaceutical agents. The present review examines the available data from laboratory animal and human intervention studies on tea and cancer prevention. These data were evaluated, and areas for further research are identified.
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Affiliation(s)
- Joshua D Lambert
- Center of Excellence for Plant and Mushroom Foods for Health, the Department of Food Science, Pennsylvania State University, University Park, PA
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Kim I, He YY. Targeting the AMP-Activated Protein Kinase for Cancer Prevention and Therapy. Front Oncol 2013; 3:175. [PMID: 23875169 PMCID: PMC3711071 DOI: 10.3389/fonc.2013.00175] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 06/21/2013] [Indexed: 12/25/2022] Open
Abstract
Despite the advances in biomedical research and clinical applications, cancer remains a leading cause of death worldwide. Given the limitations of conventional chemotherapeutics, including serious toxicities and reduced quality of life for patients, the development of safe and efficacious alternatives with known mechanism of action is much needed. Prevention of cancer through dietary intervention may hold promise and has been investigated extensively in the recent years. AMP-activated protein kinase (AMPK) is an energy sensor that plays a key role in the regulation of protein and lipid metabolism in response to changes in fuel availability. When activated, AMPK promotes energy-producing catabolic pathways while inhibiting anabolic pathways, such as cell growth and proliferation – thereby antagonizing carcinogenesis. Other anti-cancer effects of AMPK may include promoting autophagy and DNA repair upon UVB damage. In the last decade, interest in AMPK has grown extensively as it emerged as an attractive target molecule for cancer prevention and treatment. Among the latest developments is the activation of AMPK by naturally occurring dietary constituents and plant products – termed phytochemicals. Owing to their efficacy and safety, phytochemicals are considered as an alternative to the conventional harmful chemotherapy. The rising popularity of using phytochemicals for cancer prevention and therapy is supported by a substantial progress in identifying the molecular pathways involved, including AMPK. In this article, we review the recent progress in this budding field that suggests AMPK as a new molecular target in the prevention and treatment of cancer by phytochemicals.
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Affiliation(s)
- Inyoung Kim
- Pritzker School of Medicine, University of Chicago , Chicago, IL , USA
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Sul YH, Lee MS, Cha EY, Thuong PT, Khoi NM, Song IS. An ent-Kaurane Diterpenoid from Croton tonkinensis Induces Apoptosis by Regulating AMP-Activated Protein Kinase in SK-HEP1 Human Hepatocellular Carcinoma Cells. Biol Pharm Bull 2013; 36:158-64. [DOI: 10.1248/bpb.b12-00873] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Young Hoon Sul
- Surgical Oncology Research Lab., Chungnam National University Hospital
- Department of Surgery, Chungnam National University College of Medicine & Hospital
| | - Myung Sun Lee
- Surgical Oncology Research Lab., Chungnam National University Hospital
| | - Eun Young Cha
- Surgical Oncology Research Lab., Chungnam National University Hospital
| | | | | | - In Sang Song
- Department of Surgery, Chungnam National University College of Medicine & Hospital
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Landis-Piwowar K, Chen D, Foldes R, Chan TH, Dou QP. Novel epigallocatechin gallate analogs as potential anticancer agents: a patent review (2009 - present). Expert Opin Ther Pat 2012; 23:189-202. [PMID: 23230990 DOI: 10.1517/13543776.2013.743993] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
INTRODUCTION Over the past three years numerous patents and patent applications have been published relating to scientific advances in the use of the green tea polyphenol epigallocatechin gallate (EGCG) (the most abundant, and bioactive compound in green tea) and its analogs as anticancer agents. EGCG affects multiple molecular targets involved in cancer cell proliferation and survival; however, polyphenolic catechins, such as EGCG, generally exhibit poor oral bioavailability. Since the anticancer activity of polyphenols largely depends on their susceptibility to biotransformation reactions, numerous EGCG derivatives, analogs and prodrugs have been designed to improve the stability, bioavailability and anticancer potency of the native compound. AREAS COVERED This review focuses on the applications of EGCG and its analogs, derivatives and prodrugs in the prevention and treatment of human cancers. A comprehensive description of patents related to EGCG and its derivatives, analogs and prodrugs and their uses as anticancer agents is included. EXPERT OPINION EGCG targets multiple essential survival proteins and pathways in human cancer cells. Because it is unstable physiologically, numerous alterations to the EGCG molecule have been patented, either to improve the integrity of the native compound or to generate a more stable yet similarly efficacious molecule. EGCG and its derivatives, analogs and prodrugs could be developed into future drugs for chemoprevention, chemosensitization, radiosensitization and/or cancer interception.
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Affiliation(s)
- Kristin Landis-Piwowar
- Oakland University, School of Health Sciences, Biomedical Diagnostic and Therapeutic Sciences, Rochester, MI, USA.
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