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Bahrami A, Makiabadi E, Jalali S, Heidari Z, Assadi M, Rashidkhani B. Dietary Intake of Polyphenols and the Risk of Breast Cancer: a Case-Control Study. Clin Nutr Res 2021; 10:330-340. [PMID: 34796137 PMCID: PMC8575644 DOI: 10.7762/cnr.2021.10.4.330] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 10/20/2021] [Accepted: 10/21/2021] [Indexed: 11/30/2022] Open
Abstract
Despite mounting evidence that dietary polyphenols might have a protective role against the risk of breast cancer (BC), few studies have assessed the relationship between intake of polyphenol classes and subclasses with BC. Thus, we examined the relationship between dietary polyphenol classes and individual polyphenol subclasses and the risk of BC. Overall, 134 newly diagnosed BC patients and 267 healthy hospitalized controls were studied. Dietary intake was assessed using a validated 168-item food frequency questionnaire (FFQ). To estimate dietary intake of polyphenols, polyphenol content (flavonoids, lignans, stilbenes and phenolic acids) of 80 food items were derived from an updated version of the phenol explorer database containing information on the effects of food processing on polyphenol content. The dietary polyphenol intake was calculated by matching the subjects' food consumption data with our polyphenol content database. Multivariate logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CIs). Controls had higher intake of total polyphenol (marginally significant; p = 0.07), hydroxycinnamic acid (marginally significant; p = 0.05) and lignan (p = 0.01). After adjusting for potential confounders, high consumption of lignans (highest vs. lowest tertile: OR, 0.51; 95% CI, 0.26–0.97; p for trend = 0.04) associated with decreased risk of BC. There was no significant relationship between intake of other polyphenols and risk of BC. Our findings suggest that high lignan intake is associated with a reduced risk of BC.
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Affiliation(s)
- Alireza Bahrami
- Student Research Committee, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran 1981619573, Iran.,Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran 1981619573, Iran
| | - Elham Makiabadi
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran 1981619573, Iran
| | - Saba Jalali
- Department of Community Nutrition, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran 1981619573, Iran
| | - Zeinab Heidari
- Department of Community Nutrition, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran 1981619573, Iran
| | - Mojan Assadi
- Department of Oncology, Shahid Madani Hospital, Alborz University of Medical Science, Karaj 3149779453, Iran
| | - Bahram Rashidkhani
- Department of Community Nutrition, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran 1981619573, Iran
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Koppula S, Akther M, Haque ME, Kopalli SR. Potential Nutrients from Natural and Synthetic Sources Targeting Inflammaging-A Review of Literature, Clinical Data and Patents. Nutrients 2021; 13:nu13114058. [PMID: 34836313 PMCID: PMC8617641 DOI: 10.3390/nu13114058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/06/2021] [Accepted: 11/11/2021] [Indexed: 12/16/2022] Open
Abstract
Inflammaging, the steady development of the inflammatory state over age is an attributable characteristic of aging that potentiates the initiation of pathogenesis in many age-related disorders (ARDs) including neurodegenerative diseases, arthritis, cancer, atherosclerosis, type 2 diabetes, and osteoporosis. Inflammaging is characterized by subclinical chronic, low grade, steady inflammatory states and is considered a crucial underlying cause behind the high mortality and morbidity rate associated with ARDs. Although a coherent set of studies detailed the underlying pathomechanisms of inflammaging, the potential benefits from non-toxic nutrients from natural and synthetic sources in modulating or delaying inflammaging processes was not discussed. In this review, the available literature and recent updates of natural and synthetic nutrients that help in controlling inflammaging process was explored. Also, we discussed the clinical trial reports and patent claims on potential nutrients demonstrating therapeutic benefits in controlling inflammaging and inflammation-associated ARDs.
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Affiliation(s)
- Sushruta Koppula
- Department of Integrated Biosciences, College of Biomedical & Health Science, Konkuk University, Chungju 27381, Korea; (S.K.); (M.A.)
| | - Mahbuba Akther
- Department of Integrated Biosciences, College of Biomedical & Health Science, Konkuk University, Chungju 27381, Korea; (S.K.); (M.A.)
| | - Md Ezazul Haque
- Department of Applied Life Science, Graduate School, BK21 Program, Konkuk University, Chungju 27381, Korea;
| | - Spandana Rajendra Kopalli
- Department of Bioscience and Biotechnology, Sejong University, Gwangjin-gu, Seoul 05006, Korea
- Correspondence: ; Tel.: +82-2-6935-2619
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Chen Q, Xu Z, Li X, Du D, Wu T, Zhou S, Yan W, Wu M, Jin Y, Zhang J, Wang S. Epigallocatechin gallate and theaflavins independently alleviate cyclophosphamide-induced ovarian damage by inhibiting the overactivation of primordial follicles and follicular atresia. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2021; 92:153752. [PMID: 34601223 DOI: 10.1016/j.phymed.2021.153752] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 09/08/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Cyclophosphamide (CTX), which has been used to treat common female cancers for several years, often causes ovarian damage, early menopause and infertility. However, strategies for the effective prevention and treatment of CTX-induced ovarian damage are still lacking. Epigallocatechin gallate (EGCG) and theaflavins (TFs), key molecules derived from green tea or black tea, have been shown to exert preventive effects on many ageing-related diseases. PURPOSE We aimed to explore the potential preventive and protective effects of EGCG and TFs on CTX-induced ovarian damage and compare the two compounds. STUDY DESIGN Six-week-old female mice were administered a low or high dose of EGCG or TFs. The low dose was equivalent to the average daily amount of tea consumed by a drinker. METHODS We determined the oestrous cycle and serum hormone levels to evaluate ovarian endocrine function, and we performed mating tests for reproductivity. We also assessed the follicle count and AMH level to evaluate ovarian reserve, and we performed Masson's trichrome and Sirius red staining to evaluate ovarian fibrosis. We conducted γ-H2AX and TUNEL analyses to evaluate DNA damage, and we also measured the relevant indicators of oxidative stress and follicular activation, including NRF2, HO-1, SOD2, AKT, mTOR and RPS6. RESULTS EGCG and TFs treatment independently improved the ovarian endocrine function and reproductivity of mice that were administered CTX. EGCG and TFs also increased the ovarian reserve of these animals. Furthermore, EGCG and TFs alleviated oxidation-induced damage to ovarian DNA in mice by activating the NRF2/HO-1 and SOD2 pathways and reducing the apoptosis of growing follicles. At the same time, EGCG and TFs reduced the overactivation of primordial follicles by inhibiting the AKT/mTOR/RPS6 pathway. CONCLUSION The present study showed that EGCG and TFs independently improved ovarian function in mice with CTX-induced ovarian damage, thereby providing useful information for designing a potential clinical strategy that will protect against chemotherapy-induced ovarian damage.
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Affiliation(s)
- Qian Chen
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China
| | - Zheyuan Xu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China; Department of Pediatrics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiang Li
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China; Department of pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Dingfu Du
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China; Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China
| | - Tong Wu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China
| | - Su Zhou
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China
| | - Wei Yan
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China
| | - Meng Wu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China
| | - Yan Jin
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China
| | - Jinjin Zhang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China.
| | - Shixuan Wang
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, National Clinical Research Center for Obstetrical and Gynecological Diseases, Wuhan, Hubei, China.
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Xiang P, Zhu Q, Tukhvatshin M, Cheng B, Tan M, Liu J, Wang X, Huang J, Gao S, Lin D, Zhang Y, Wu L, Lin J. Light control of catechin accumulation is mediated by photosynthetic capacity in tea plant (Camellia sinensis). BMC PLANT BIOLOGY 2021; 21:478. [PMID: 34670494 PMCID: PMC8527772 DOI: 10.1186/s12870-021-03260-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 10/08/2021] [Indexed: 05/02/2023]
Abstract
BACKGROUND Catechins are crucial in determining the flavour and health benefits of tea, but it remains unclear that how the light intensity regulates catechins biosynthesis. Therefore, we cultivated tea plants in a phytotron to elucidate the response mechanism of catechins biosynthesis to light intensity changes. RESULTS In the 250 μmol·m- 2·s- 1 treatment, the contents of epigallocatechin, epigallocatechin gallate and total catechins were increased by 98.94, 14.5 and 13.0% respectively, compared with those in the 550 μmol·m- 2·s- 1 treatment. Meanwhile, the photosynthetic capacity was enhanced in the 250 μmol·m- 2·s- 1 treatment, including the electron transport rate, net photosynthetic rate, transpiration rate and expression of related genes (such as CspsbA, CspsbB, CspsbC, CspsbD, CsPsbR and CsGLK1). In contrast, the extremely low or high light intensity decreased the catechins accumulation and photosynthetic capacity of the tea plants. The comprehensive analysis revealed that the response of catechins biosynthesis to the light intensity was mediated by the photosynthetic capacity of the tea plants. Appropriately high light upregulated the expression of genes related to photosynthetic capacity to improve the net photosynthetic rate (Pn), transpiration rate (Tr), and electron transfer rate (ETR), which enhanced the contents of substrates for non-esterified catechins biosynthesis (such as EGC). Meanwhile, these photosynthetic capacity-related genes and gallic acid (GA) biosynthesis-related genes (CsaroB, CsaroDE1, CsaroDE2 and CsaroDE3) co-regulated the response of GA accumulation to light intensity. Eventually, the epigallocatechin gallate content was enhanced by the increased contents of its precursors (EGC and GA) and the upregulation of the CsSCPL gene. CONCLUSIONS In this study, the catechin content and photosynthetic capacity of tea plants increased under appropriately high light intensities (250 μmol·m- 2·s- 1 and 350 μmol·m- 2·s- 1) but decreased under extremely low or high light intensities (150 μmol·m- 2·s- 1 or 550 μmol·m- 2·s- 1). We found that the control of catechin accumulation by light intensity in tea plants is mediated by the plant photosynthetic capacity. The research provided useful information for improving catechins content and its light-intensity regulation mechanism in tea plant.
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Affiliation(s)
- Ping Xiang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Qiufang Zhu
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Marat Tukhvatshin
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Bosi Cheng
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Meng Tan
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jianghong Liu
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xingjian Wang
- Institute of Photobiological Industry, Fujian Sanan Sino-Science Photobiotech Co., Ltd, Xiamen, 361008, China
| | - Jiaxin Huang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Shuilian Gao
- Anxi College of Tea Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Dongyi Lin
- Anxi College of Tea Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yue Zhang
- Anxi College of Tea Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Liangyu Wu
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jinke Lin
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
- Anxi College of Tea Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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105
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Dardashti Pour E, Yaghobian F, Dehghan F, Azarbayjani MA. Forecast of ameliorating effect of dietary flavonol consumption in white tea with or without aerobic training on type 2 diabetes (T2D) in females. Clin Nutr ESPEN 2021; 45:134-140. [PMID: 34620309 DOI: 10.1016/j.clnesp.2021.08.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/30/2021] [Accepted: 08/21/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND AND AIMS Diabetes Mellitus (D.M.) is a chronic metabolic disease characterized by hyperglycemia due to insufficient or inefficient insulin secretory response that has become a widespread epidemic primarily due to the increasing prevalence and incidence of type 2 diabetes. Phytochemicals such as flavonoids and regular physical activity have recently attracted attention to developing new anti-diabetic drugs or alternative therapy to control diabetes. The aim of this study was to compare effects of dietary Flavonol consumption in white tea, with or without aerobic training, among patients with type 2 diabetes mellitus as a randomized trial. METHODS 49 women with T2D were randomly assigned into groups including control, white tea, aerobic training, and aerobic training + white tea. The interventions were carried out for six months. Weight, Body Mass Index (BMI), body Fat, peak oxygen consumption (VO2Max), and Blood Pressure were evaluated at both the first and last days of the research period. Blood samples were withdrawn on the same days via venipuncture to test blood glucose, insulin, low-density lipoprotein (LDL), high-density lipoprotein (HDL), cholesterol, and triglycerides (T.G.). RESULTS Characteristics analysis showed significant improvements in treated groups. In addition, glucose, insulin, LDL, Cholesterol, and T.G. were significantly reduced while HDL was remarkably increased in treated groups compared to pre-experiment values or the diabetic control group. CONCLUSION Collectively, white tea combined with aerobic training favorably affects glycemic parameters, lipid profile, blood pressure, and VO2Max in six months in women with T2D. Registered under Clinical Trials.gov Identifier no. NCT00123456.
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Affiliation(s)
- Elnaz Dardashti Pour
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Farnaz Yaghobian
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Firouzeh Dehghan
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran.
| | - Mohammad Ali Azarbayjani
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Central Tehran Branch, Islamic Azad University, Tehran, Iran
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Zhang S, Xu Y, Zeng L, An X, Su D, Qu Y, Ma J, Tang X, Wang X, Yang J, Mishra C, Chandra SR, Ai J. Epigallocatechin-3-Gallate Allosterically Activates Protein Kinase C-α and Improves the Cognition of Estrogen Deficiency Mice. ACS Chem Neurosci 2021; 12:3672-3682. [PMID: 34505505 DOI: 10.1021/acschemneuro.1c00401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Protein kinase C (PKC) isozymes play essential roles in biological processes, and activation of PKC is proposed to alleviate the symptoms of a variety of diseases. It would be of great significance to find effective pharmacological modulators of PKC isozymes that can be translated for clinical use. Here, using in vitro activity assay, we demonstrated that green tea extract (-)-epigallocatechin-3-gallate (EGCG) dose-dependently activated PKCα with a half effective concentration (EC50) of 0.49 μM. We also performed surface plasmon resonance analysis and found that EGCG binds PKCα with an equilibrium dissociation constant (KD) value of 4.11 × 10-6 mol/L. Further computational flexible docking analysis revealed that EGCG interacted with the catalytic C3-C4 domain of PKCα (PDB: 4RA4) through establishing polar hydrogen bonds with V420, T401, E387, and K368 of PKCα, and the benzene ring group of EGCG hydrophobically interacted with the hydrophobic pocket formed by L345, M470, I479, and V353 of PKCα. Interestingly, the PKCα-selective blocker Ro-32-0432 could compete with EGCG for the same substrate-binding pocket of PKCα. Moreover, we found that EGCG dose-dependently improved the spatial memory, object recognition ability, and hippocampal long-term potentiation of ovariectomized mice, which was offset by Ro-32-0432. Collectively, our findings reveal a novel PKCα agonist and open the way to a new perspective on PKCα pharmacology and the treatment of PKCα-related diseases, including cognitive impairment.
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Affiliation(s)
- Shuai Zhang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Yi Xu
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Lu Zeng
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Xiaobin An
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Dan Su
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Yang Qu
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Jing Ma
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Xin Tang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Xuqiao Wang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Junkai Yang
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Chandan Mishra
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Shah Ram Chandra
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
| | - Jing Ai
- Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), College of Pharmacy of Harbin Medical University, Harbin, Heilongjiang Province 150086, China
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Esposito F, Giuffrida R, Raciti G, Puglisi C, Forte S. Wee1 Kinase: A Potential Target to Overcome Tumor Resistance to Therapy. Int J Mol Sci 2021; 22:ijms221910689. [PMID: 34639030 PMCID: PMC8508993 DOI: 10.3390/ijms221910689] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 12/21/2022] Open
Abstract
During the cell cycle, DNA suffers several lesions that need to be repaired prior to entry into mitosis to preserve genome integrity in daughter cells. Toward this aim, cells have developed complex enzymatic machinery, the so-called DNA damage response (DDR), which is able to repair DNA, temporarily stopping the cell cycle to provide more time to repair, or if the damage is too severe, inducing apoptosis. This DDR mechanism is considered the main source of resistance to DNA-damaging therapeutic treatments in oncology. Recently, cancer stem cells (CSCs), which are a small subset of tumor cells, were identified as tumor-initiating cells. CSCs possess self-renewal potential and persistent tumorigenic capacity, allowing for tumor re-growth and relapse. Compared with cancer cells, CSCs are more resistant to therapeutic treatments. Wee1 is the principal gatekeeper for both G2/M and S-phase checkpoints, where it plays a key role in cell cycle regulation and DNA damage repair. From this perspective, Wee1 inhibition might increase the effectiveness of DNA-damaging treatments, such as radiotherapy, forcing tumor cells and CSCs to enter into mitosis, even with damaged DNA, leading to mitotic catastrophe and subsequent cell death.
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Zhang Z, Xie L, Ju Y, Dai Y. Recent Advances in Metal-Phenolic Networks for Cancer Theranostics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100314. [PMID: 34018690 DOI: 10.1002/smll.202100314] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 02/15/2021] [Indexed: 06/12/2023]
Abstract
Nanomedicine integrates different functional materials to realize the customization of carriers, aiming at increasing the cancer therapeutic efficacy and reducing the off-target toxicity. However, efforts on developing new drug carriers that combine precise diagnosis and accurate treatment have met challenges of uneasy synthesis, poor stability, difficult metabolism, and high cytotoxicity. Metal-phenolic networks (MPNs), making use of the coordination between phenolic ligands and metal ions, have emerged as promising candidates for nanomedicine, most notably through the service as multifunctional theranostic nanoplatforms. MPNs present unique properties, such as rapid preparation, negligible cytotoxicity, and pH responsiveness. Additionally, MPNs can be further modified and functionalized to meet specific application requirements. Here, the classification of polyphenols is first summarized, followed by the introduction of the properties and preparation strategies of MPNs. Then, their recent advances in biomedical sciences including bioimaging and anti-tumor therapies are highlighted. Finally, the main limitations, challenges, and outlooks regarding MPNs are raised and discussed.
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Affiliation(s)
- Zhan Zhang
- Cancer Centre and Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau, SAR, 999078, China
| | - Lisi Xie
- Cancer Centre and Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau, SAR, 999078, China
| | - Yi Ju
- School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, 3083, Australia
| | - Yunlu Dai
- Cancer Centre and Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau, SAR, 999078, China
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Tanprasertsuk J, Tate DE, Shmalberg J. Roles of plant-based ingredients and phytonutrients in canine nutrition and health. J Anim Physiol Anim Nutr (Berl) 2021; 106:586-613. [PMID: 34495560 PMCID: PMC9291198 DOI: 10.1111/jpn.13626] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/13/2021] [Accepted: 08/11/2021] [Indexed: 12/05/2022]
Abstract
Dogs possess the ability to obtain essential nutrients, established by the Association of American Feed Control Officials (AAFCO), from both animal‐ and plant‐based ingredients. There has been a recent increase in the popularity of diets that limit or completely exclude certain plant‐based ingredients. Examples of these diets include ‘ancestral’ or ‘evolutionary’ diets, raw meat‐based diets and grain‐free diets. As compared to animal sources, plant‐derived ingredients (including vegetables, fruits, grains, legumes, nuts and seeds) provide many non‐essential phytonutrients with some data suggesting they confer health benefits. This review aims to assess the strength of current evidence on the relationship between the consumption of plant‐based foods and phytonutrients (such as plant‐derived carotenoids, polyphenols and phytosterols) and biomarkers of health and diseases (such as body weight/condition, gastrointestinal health, immune health, cardiovascular health, visual function and cognitive function) from clinical trials and epidemiological studies. This review highlights the potential nutritional and health benefits of including plant‐based ingredients as a part of balanced canine diets. We also highlight current research gaps in existing studies and provide future research directions to inform the impact of incorporating plant‐based ingredients in commercial or home‐prepared diets.
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Affiliation(s)
| | | | - Justin Shmalberg
- NomNomNow Inc, Nashville, TN, USA.,Department of Comparative, Diagnostic and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
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Chen Y, Cheng S, Dai J, Wang L, Xu Y, Peng X, Xie X, Peng C. Molecular mechanisms and applications of tea polyphenols: A narrative review. J Food Biochem 2021; 45:e13910. [PMID: 34426979 DOI: 10.1111/jfbc.13910] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/29/2021] [Accepted: 08/09/2021] [Indexed: 12/12/2022]
Abstract
Tea is a worldwide popular drink with high nutritional and medicinal values as it is rich in nutrients, such as polyphenols, amino acids, vitamins, glycosides, and so on. Among them, tea polyphenols (TPs) are the current research hotspot. TPs are known to have multiple biological activities such as anti-oxidation, anti-tumor, anti-inflammation, anti-bacteria, lowering lipid, and liver protection. By reviewing a large number of literatures, we explained the mechanism of TPs exerting biological activity and a wide range of applications. We also discussed the deficiencies and development potential of TPs, in order to provide theoretical reference and scientific basis for the subsequent development and utilization of TPs. PRACTICAL APPLICATIONS: We summarized the bioactivity mechanisms of TPs in anti-tumor, anti-oxidation, antibacterial, anti-inflammatory, lipid-lowering, and liver protection, focused on its application fields in food and medicine, and discussed the deficiency and development potential of current research on TPs, so as to provide a certain convenient way for scholars studying TPs. It is expected to contribute to the subsequent discovery of biological activity and the broadening of the field of TPs.
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Affiliation(s)
- Yan Chen
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Si Cheng
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jiangang Dai
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Liang Wang
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yun Xu
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaoyu Peng
- School of Public Health, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaofang Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu, China.,College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Wei H, Ge Q, Zhang LY, Xie J, Gan RH, Lu YG, Zheng DL. EGCG inhibits growth of tumoral lesions on lip and tongue of K-Ras transgenic mice through the Notch pathway. J Nutr Biochem 2021; 99:108843. [PMID: 34407449 DOI: 10.1016/j.jnutbio.2021.108843] [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: 10/14/2020] [Revised: 05/11/2021] [Accepted: 07/06/2021] [Indexed: 01/29/2023]
Abstract
Epigallocatechin-3-gallate (EGCG), the main active ingredient of green tea, exhibits low toxic side effect and versatile bioactivities, and its anti-cancer effect has been extensively studied. Most of the studies used cancer cell lines and xenograft models. However, whether EGCG can prevent tumor onset after cancer-associated mutations occur is still controversial. In the present study, Krt14-cre/ERT-Kras transgenic mice were developed and the expression of K-RasG12D was induced by tamoxifen. Two weeks after induction, the K-Ras mutant mice developed exophytic tumoral lesions on the lips and tongues, with significant activation of Notch signaling pathway. Administration of EGCG effectively delayed the time of appearance, decreased the size and weight of tumoral lesions, relieved heterotypic hyperplasia of tumoral lesions, and prolonged the life of the mice. The Notch signaling pathway was significantly inhibited by EGCG in the tumoral lesions. Furthermore, EGCG significantly induced cell apoptosis and inhibited the proliferation of tongue cancer cells by blocking the activation of Notch signaling pathway. Taken together, these results indicate EGCG as an effective chemotherapeutic agent for tongue cancer by targeting Notch pathway.
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Affiliation(s)
- Hua Wei
- Fujian Key Laboratory of Oral Diseases, Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, Fujian, China; Department of Pediatric Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Qi Ge
- Fujian Key Laboratory of Oral Diseases, Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, Fujian, China; Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Ling-Yu Zhang
- School of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Jing Xie
- Fujian Key Laboratory of Oral Diseases, Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, Fujian, China; Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Rui-Huan Gan
- Fujian Key Laboratory of Oral Diseases, Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, Fujian, China; Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - You-Guang Lu
- Fujian Key Laboratory of Oral Diseases, Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, Fujian, China; Department of Preventive Dentistry, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.
| | - Da-Li Zheng
- Fujian Key Laboratory of Oral Diseases, Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, Fujian, China.
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Influence of Seasonal and Yearly Variation on Phenolic Profiles, Caffeine, and Antioxidant Activities of Green Tea (Camellia sinensis (L.) Kuntze) from Azores. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11167439] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This study compares the antioxidant properties (RSADPPH–DPPH radical scavenging activity, FRAP–ferric reducing activity power, and FIC–ferrous ion-chelating activity), the total phenolics (TP), total flavonoids (TF), and catechin profiles, as well as the caffeine content of Azorean Camellia sinensis green tea collected in seasons of two different years. The RSADPPH showed some variation between 2019 and 2020, and presented, in general, better results in 2020 as well as during the summer seasons. The FRAP was also noted to be at its highest in July and August of the two investigated years (6.64 and 6.40 µg/mL in 2019 and 5.85 and 5.46 µg/mL in 2020). According to FIC activity, the August 2019 sample exhibited the highest value (76.18%). The TP varied between 291.14 and 326.93 mg gallic acid equivalents (GAE)/g of dried extract (DE) in 2019 and between 300.25 and 320.58 mg GAE/g DE in 2020. Concerning the TF, the values varied between 51.85 and 67.93 mg rutin equivalents (RE)/g DE in 2019 and between 50.27 and 69.57 mg RE/g DE in 2020. Epicatechins derivatives, determined by HPLC, presented higher values in all samples from 2020 compared to 2019, and the same was observed for esterified catechins. The epigallocatechin-3-gallate content was also higher in all samples from 2020 (214.52–240.16 mg/g DE) compared to 2019 (140.91–210.83 mg/g DE). Regarding caffeine content (12.86–20.45 mg/g DE in 2019 and 13.19–29.35 mg/g DE in 2020), the samples from April and June exhibited similar values in both years. In general, green tea samples exhibited better results in 2020 than in 2019, with the exception of FIC activity, while the varied TP and TF contents in certain months reflect the impact of climatic variation on tea quality.
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Romano A, Martel F. The Role of EGCG in Breast Cancer Prevention and Therapy. Mini Rev Med Chem 2021; 21:883-898. [PMID: 33319659 DOI: 10.2174/1389557520999201211194445] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 09/02/2020] [Accepted: 09/05/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Breast cancer is the most frequent cancer in women. Green tea has been studied for breast cancer chemopreventive and possibly chemotherapeutic effects due to its high content in polyphenolic compounds, including epigallocatechin-3-gallate (EGCG). METHOD This review is based on literature research that included papers registered on the Medline® database. The research was conducted through PubMed, applying the following query: "EGCG"AND "breast cancer". The result was a total of 88 articles in which this review stands on. RESULTS In vitro, EGCG shows antioxidant or pro-oxidant properties, depending on the concentration and exposure time. EGCG blocks cell cycle progression and modulates signaling pathways that affect cell proliferation and differentiation. EGCG also induces apoptosis, negatively modulates different steps involved in metastasis, and targets angiogenesis by inhibiting VEGF transcription. In vivo investigations have shown that oral administration of EGCG results in the reduction of tumor growth and in antimetastatic and antiangiogenic effects in animal xenograft and allograft models. DISCUSSION Much remains unknown about the molecular mechanisms involved in the protective effects of EGCG on mammary carcinogenesis. In addition, more studies in vivo are necessary to determine the potential toxicity of EGCG at higher doses and to elucidate its interactions with other drugs. CONCLUSION A protective effect of EGCG has been shown in different experimental models and under different experimental conditions, suggesting clinical implications of EGCG for breast cancer prevention and therapy. The data presented in this review support the importance of further investigations.
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Affiliation(s)
- Adriana Romano
- Faculty of Medicine of University of Porto, Porto, Portugal
| | - Fátima Martel
- Department of Biomedicine-Unit of Biochemistry, Faculty of Medicine of University of Porto, Porto, Portugal and Instituto de Investigacao e Inovacao em Saude(i3S), University of Porto, Porto, Portugal
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Chandra G, Patel S, Panchal M, Singh DV. S-adenosyl-L-homocysteine Hydrolase: Its Inhibitory Activity Against Plasmodium falciparum and Development of Malaria Drugs. Mini Rev Med Chem 2021; 21:833-846. [PMID: 33342411 DOI: 10.2174/1389557521666201218155321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/31/2020] [Accepted: 11/02/2020] [Indexed: 11/22/2022]
Abstract
Parasite Plasmodium falciparum is continuously giving a challenge to human beings by changing itself against most of the antimalarial drugs and its consequences can be seen in the form of a huge number of deaths each year especially in the poor and developing country. Due to its drug resistance ability, new drugs are regularly needed to kill the organism. Many new drugs have been developed based on different mechanisms. One of the potential mechanisms is to hamper protein synthesis by blocking the gene expression. S-Adenosyl-L-homocysteine (SAH) hydrolase is a NAD+ dependent tetrameric enzyme, which is responsible for the reversible hydrolysis of AdoHcy to adenosine and L-homocysteine, has been recognized as a new target for antimalarial agents since the parasite has a specific SAH hydrolase. The inhibition of SAH hydrolase causes the intracellular accumulation of S-Adenosyl-L-homocysteine, elevating the ratio of SAH to S-adenosylmethionine (SAM) and inhibiting SAM-dependent methyltransferase that catalyzes methylation of the capped structure at the 5'-terminus of mRNA, and other methylation reaction which is essential for parasite proliferation. In other words, S-Adenosyl-Lhomocysteine hydrolase regulates methyltransferase reactions. In this way, SAH hydrolase inhibitors can be used for the treatment of different diseases like malaria, cancer, viral infection, etc. by ultimately stopping the synthesis of protein. Many antiviral drugs have been synthesized and marketed which are based on the inhibition of SAH hydrolase. This review summarises the development of SAH inhibitors developed over the last 20 years and their potentiality for the treatment of malaria.
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Affiliation(s)
- Girish Chandra
- Department of Chemistry, School of Physical and Chemical Sciences, Central University of South Bihar, Gaya, Bihar, India
| | - Samridhi Patel
- Department of Chemistry, School of Physical and Chemical Sciences, Central University of South Bihar, Gaya, Bihar, India
| | - Manoj Panchal
- Department of Life Science, School of Earth, Biological and Environmental Science, Central University of South Bihar, Gaya, Bihar, India
| | - Durg Vijay Singh
- Department of Bioinformatics, School of Earth, Biological and Environmental Science, Central University of South Bihar, Gaya, Bihar, India
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Xu A, Lee J, Zhao Y, Wang Y, Li X, Xu P. Potential effect of EGCG on the anti-tumor efficacy of metformin in melanoma cells. J Zhejiang Univ Sci B 2021; 22:548-562. [PMID: 34269008 DOI: 10.1631/jzus.b2000455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Metformin, a first-line drug for type 2 diabetes mellitus, has been recognized as a potential anti-tumor agent in recent years. Epigallocatechin-3-gallate (EGCG), as the dominant catechin in green tea, is another promising adjuvant agent for tumor prevention. In the present work, the potential effect of EGCG on the anti-tumor efficacy of metformin in a mouse melanoma cell line (B16F10) was investigated. Results indicated that EGCG and metformin exhibited a synergistic effect on cell viability, migration, and proliferation, as well as signal transducer and activator of transcription 3/nuclear factor-κB (STAT3/NF-κB) pathway signaling and the production of inflammation cytokines. Meanwhile, the combination showed an antagonistic effect on cell apoptosis and oxidative stress levels. The combination of EGCG and metformin also differentially affected the nucleus (synergism) and cytoplasm (antagonism) of B16F10 cells. Our findings provide new insight into the potential effects of EGCG on the anti-tumor efficacy of metformin in melanoma cells.
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Affiliation(s)
- An'an Xu
- Department of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Jeehyun Lee
- Department of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Yueling Zhao
- Department of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Yuefei Wang
- Department of Tea Science, Zhejiang University, Hangzhou 310058, China
| | - Xiaoli Li
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Ping Xu
- Department of Tea Science, Zhejiang University, Hangzhou 310058, China
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Encapsulation of Polyphenols from Lycium barbarum Leaves into Liposomes as a Strategy to Improve Their Delivery. NANOMATERIALS 2021; 11:nano11081938. [PMID: 34443768 PMCID: PMC8398605 DOI: 10.3390/nano11081938] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/21/2021] [Accepted: 07/24/2021] [Indexed: 11/17/2022]
Abstract
This study is focused on the encapsulation of polyphenols from Lycium barbarum leaves into liposomes as a strategy to improve their delivery. Liposomes loaded with Lycium barbarum leaves extract were obtained and characterized for particle size, polydispersity, entrapment efficiency, and stability. Liposomes presented entrapment efficiency higher than 75%, nanometric particle size, narrow polydispersity, and good stability over three months at 4 °C. The liposomes containing Lycium barbarum offered a slower release of polyphenols with attenuated burst effect compared with the dissolution of free Lycium barbarum extract in phosphate buffer solution at pH 7.4. Moreover, an in vitro pretreatment of 24 h with loaded liposomes showed a cytoprotective effect against H2O2-induced cytotoxicity on L-929 mouse fibroblasts cells. These preliminary findings imply that liposomes could be successfully employed as carriers for polyphenols in pharmaceutical applications.
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Augimeri G, Montalto FI, Giordano C, Barone I, Lanzino M, Catalano S, Andò S, De Amicis F, Bonofiglio D. Nutraceuticals in the Mediterranean Diet: Potential Avenues for Breast Cancer Treatment. Nutrients 2021; 13:2557. [PMID: 34444715 PMCID: PMC8400469 DOI: 10.3390/nu13082557] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 07/22/2021] [Accepted: 07/25/2021] [Indexed: 12/12/2022] Open
Abstract
The traditional Mediterranean Diet constitutes a food model that refers to the dietary patterns of the population living in countries bordering the Mediterranean Sea in the early 1960s. A huge volume of literature data suggests that the Mediterranean-style diet provides several dietary compounds that have been reported to exert beneficial biological effects against a wide spectrum of chronic illnesses, such as cardiovascular and neurodegenerative diseases and cancer including breast carcinoma. Among bioactive nutrients identified as protective factors for breast cancer, natural polyphenols, retinoids, and polyunsaturated fatty acids (PUFAs) have been reported to possess antioxidant, anti-inflammatory, immunomodulatory and antitumoral properties. The multiple anticancer mechanisms involved include the modulation of molecular events and signaling pathways associated with cell survival, proliferation, differentiation, migration, angiogenesis, antioxidant enzymes and immune responses. This review summarizes the anticancer action of some polyphenols, like resveratrol and epigallocatechin 3-gallate, retinoids and omega-3 PUFAs by highlighting the important hallmarks of cancer in terms of (i) cell cycle growth arrest, (ii) apoptosis, (iii) inflammation and (iv) angiogenesis. The data collected from in vitro and in vivo studies strongly indicate that these natural compounds could be the prospective candidates for the future anticancer therapeutics in breast cancer disease.
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Affiliation(s)
- Giuseppina Augimeri
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
| | - Francesca Ida Montalto
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
| | - Cinzia Giordano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
- Centro Sanitario, University of Calabria, 87036 Arcavacata di Rende, Italy
| | - Ines Barone
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
- Centro Sanitario, University of Calabria, 87036 Arcavacata di Rende, Italy
| | - Marilena Lanzino
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
- Centro Sanitario, University of Calabria, 87036 Arcavacata di Rende, Italy
| | - Stefania Catalano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
- Centro Sanitario, University of Calabria, 87036 Arcavacata di Rende, Italy
| | - Sebastiano Andò
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
- Centro Sanitario, University of Calabria, 87036 Arcavacata di Rende, Italy
| | - Francesca De Amicis
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
- Centro Sanitario, University of Calabria, 87036 Arcavacata di Rende, Italy
| | - Daniela Bonofiglio
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, Italy; (G.A.); (F.I.M.); (C.G.); (I.B.); (M.L.); (S.C.); (S.A.); (F.D.A.)
- Centro Sanitario, University of Calabria, 87036 Arcavacata di Rende, Italy
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Wang Y, Shen XJ, Su FW, Xie YR, Wang LX, Zhang N, Wu YL, Niu Y, Zhang DY, Zi CT, Wang XJ, Sheng J. Novel Perbutyrylated Glucose Derivatives of (-)-Epigallocatechin-3-Gallate Inhibit Cancer Cells Proliferation by Decreasing Phosphorylation of the EGFR: Synthesis, Cytotoxicity, and Molecular Docking. Molecules 2021; 26:4361. [PMID: 34299635 PMCID: PMC8306927 DOI: 10.3390/molecules26144361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/03/2021] [Accepted: 07/14/2021] [Indexed: 01/10/2023] Open
Abstract
Lung cancer is one of the most commonly occurring cancer mortality worldwide. The epidermal growth factor receptor (EGFR) plays an important role in cellular functions and has become the new promising target. Natural products and their derivatives with various structures, unique biological activities, and specific selectivity have served as lead compounds for EGFR. D-glucose and EGCG were used as starting materials. A series of glucoside derivatives of EGCG (7-12) were synthesized and evaluated for their in vitro anticancer activity against five human cancer cell lines, including HL-60, SMMC-7721, A-549, MCF-7, and SW480. In addition, we investigated the structure-activity relationship and physicochemical property-activity relationship of EGCG derivatives. Compounds 11 and 12 showed better growth inhibition than others in four cancer cell lines (HL-60, SMMC-7721, A-549, and MCF), with IC50 values in the range of 22.90-37.87 μM. Compounds 11 and 12 decreased phosphorylation of EGFR and downstream signaling protein, which also have more hydrophobic interactions than EGCG by docking study. The most active compounds 11 and 12, both having perbutyrylated glucose residue, we found that perbutyrylation of the glucose residue leads to increased cytotoxic activity and suggested that their potential as anticancer agents for further development.
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Affiliation(s)
- Ya Wang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Xiao-Jing Shen
- Party Committee of Organ, Yunnan Agricultural University, Kunming 650201, China;
| | - Fa-Wu Su
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China;
| | - Yin-Rong Xie
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Li-Xia Wang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Ning Zhang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Yi-Long Wu
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Yun Niu
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Dong-Ying Zhang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
| | - Cheng-Ting Zi
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
| | - Xuan-Jun Wang
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
| | - Jun Sheng
- Key Laboratory of Pu-er Tea Science, Ministry of Education, College of Science, Yunnan Agricultural University, Kunming 650201, China; (Y.W.); (Y.-R.X.); (L.-X.W.); (N.Z.); (Y.-L.W.); (Y.N.); (D.-Y.Z.)
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
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Suner SS, Sahiner M, Mohapatra S, Ayyala RS, Bhethanabotla VR, Sahiner N. Degradable poly(catechin) nanoparticles as a versatile therapeutic agent. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2021.1941957] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Selin S. Suner
- Department of Chemistry, Faculty of Sciences & Arts, and Nanoscience and Technology Research and Application Center (NANORAC), Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Mehtap Sahiner
- Department of Fashion Design, Canakkale Applied Science, Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Subhra Mohapatra
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Ramesh S. Ayyala
- Department of Ophthalmology, Morsani College of Medicine, University of South Florida Eye Institute, Tampa, Florida, USA
| | - Venkat R. Bhethanabotla
- Department of Chemical, Biological, and Materials Science and Engineering Program, University of South Florida, Tampa, Florida, USA
| | - Nurettin Sahiner
- Department of Chemistry, Faculty of Sciences & Arts, and Nanoscience and Technology Research and Application Center (NANORAC), Canakkale Onsekiz Mart University, Canakkale, Turkey
- Department of Ophthalmology, Morsani College of Medicine, University of South Florida Eye Institute, Tampa, Florida, USA
- Department of Chemical, Biological, and Materials Science and Engineering Program, University of South Florida, Tampa, Florida, USA
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Qu Z, Zhou S, Li P, Liu C, Yuan B, Zhang S, Liu A. Natural products and skeletal muscle health. J Nutr Biochem 2021; 93:108619. [DOI: 10.1016/j.jnutbio.2021.108619] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 11/26/2020] [Accepted: 02/01/2021] [Indexed: 12/17/2022]
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121
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Fujimura Y, Fujino K, Yoshimoto T, Nezu A, Marugame Y, Bae J, Kumazoe M, Tachibana H. Eriodictyol-Amplified 67-kDa Laminin Receptor Signaling Potentiates the Antiallergic Effect of O-Methylated Catechin. JOURNAL OF NATURAL PRODUCTS 2021; 84:1823-1830. [PMID: 34106718 DOI: 10.1021/acs.jnatprod.1c00337] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
(-)-Epigallocatechin-3-O-(3-O-methyl) gallate (1, EGCG3″Me), an antiallergic O-methylated catechin, is present in high quantities in the green tea cultivar "Benifuuki" (Camellia sinensis L.). Previous studies have shown that EGCG3″Me inhibited basophil degranulation mediated through the cell-surface 67-kDa laminin receptor (67LR), but the mechanisms are not fully elucidated. This study aimed to investigate the mechanisms underlying the inhibitory effect of EGCG3″Me on IgE/antigen (Ag)-mediated degranulation and the combined effect of EGCG3″Me with eriodictyol (2), a bioactive flavanone. EGCG3″Me inhibited β-hexosaminidase release from the rat basophilic/mast cell line RBL-2H3 stimulated by IgE/Ag and induced acid sphingomyelinase (ASM) activity. This induction was inhibited by anti-67LR antibody treatment. The ASM-specific inhibitor desipramine inhibited EGCG3″Me-induced suppression of degranulation. The soluble guanylate cyclase (sGC) inhibitor NS2028 weakened the potency of EGCG3″Me, and the sGC activator BAY41-2272 suppressed degranulation. The ability of EGCG3″Me to induce ASM activity and inhibit degranulation was amplified by eriodictyol. Furthermore, oral administration of the lemon-peel-derived eriodyctiol-7-O-glucoside (3) potentiated the suppressive effect of EGCG3″Me-rich "Benifuuki" green tea on the IgE/Ag-induced passive cutaneous anaphylaxis (PCA) reaction in BALB/c mice. These results suggest that EGCG3″Me inhibits IgE/Ag-mediated degranulation by inducing the 67LR/sGC/ASM signaling pathway, and eriodictyol amplifies this signaling.
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Affiliation(s)
- Yoshinori Fujimura
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Konatsu Fujino
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Takanori Yoshimoto
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Ayaka Nezu
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Yuki Marugame
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Jaehoon Bae
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Motofumi Kumazoe
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Hirofumi Tachibana
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
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Haykal T, Younes M, El Khoury M, Ammoury C, Tannous S, Hodroj MH, Sarkis R, Gasilova N, Menin L, Rizk S. The pro-apoptotic properties of a phytonutrient rich infusion of A. cherimola leaf extract on AML cells. Biomed Pharmacother 2021; 140:111592. [PMID: 34088572 DOI: 10.1016/j.biopha.2021.111592] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/27/2021] [Accepted: 04/02/2021] [Indexed: 12/20/2022] Open
Abstract
Annonaceae family has broad uses in herbal medicine for treatment of several diseases, whether through seeds' or leaves' extracts. The present study investigates the antiproliferative and antitumor activity of Annona cherimola aqueous leaf (AAL) extract/infusion in acute myeloid leukemia (AML) cell lines in vitro. High-resolution LC-MS was first used to analyze the composition of the aqueous extract. Cell proliferation assay, Annexin V staining, cell cycle analysis, dual Annexin V/PI staining, cell death quantification by ELISA, ROS level detection and Western Blotting were then performed to elucidate the therapeutic effects of AAL extract. The results obtained revealed a potent antioxidant activity of AAL extract. Moreover, the extract exhibited dose- and time-dependent antiproliferative effects on AML cell lines by decreasing cell viability with an IC50 of 5.03% (v/v) at 24 h of treatment of KG-1 cells. This decrease in viability was accompanied with a significant increase in apoptotic cell death with cell cycle arrest and flipping of the phosphatidylserine from the inner to the outer leaflet of the cell membrane. The respective overexpression and downregulation of proapoptotic proteins like cleaved caspase-8, cleaved PARP-1 and Bax and antiapoptotic proteins like Bcl-2 further validated the apoptotic pathway induced by AAL on AML cells. Finally, LC-MS revealed the presence of several compounds like fatty acids, terpenes, phenolics, cinnamic acids and flavonoids that could contribute to the antioxidant and anti-cancer effects of this herbal infusion. In addition to the generally known nutritional effects of the Annona cherimola fruit and leaves, the presented data validates the antioxidant and anti-cancerous effects of the leaf infusion on AML cell lines, proposing its potential therapeutic use against acute myeloid leukemia with future in vivo and clinical trials.
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Affiliation(s)
- Tony Haykal
- Department of Natural Sciences, Lebanese American University, Byblos, Lebanon.
| | - Maria Younes
- Department of Natural Sciences, Lebanese American University, Byblos, Lebanon.
| | - Marianne El Khoury
- Department of Natural Sciences, Lebanese American University, Byblos, Lebanon.
| | - Carl Ammoury
- Department of Natural Sciences, Lebanese American University, Byblos, Lebanon.
| | - Stephanie Tannous
- Department of Natural Sciences, Lebanese American University, Byblos, Lebanon.
| | - Mohammad H Hodroj
- Department of Natural Sciences, Lebanese American University, Byblos, Lebanon.
| | - Rita Sarkis
- Department of Natural Sciences, Lebanese American University, Byblos, Lebanon; Laboratory of Regenerative Hematopoiesis, Swiss Institute for Experimental Cancer Research (ISREC) & Institute of Bioengineering (IBI), School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Natalia Gasilova
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Laure Menin
- Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Sandra Rizk
- Department of Natural Sciences, Lebanese American University, Byblos, Lebanon.
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123
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Guo Y, Sun Q, Wu FG, Dai Y, Chen X. Polyphenol-Containing Nanoparticles: Synthesis, Properties, and Therapeutic Delivery. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007356. [PMID: 33876449 DOI: 10.1002/adma.202007356] [Citation(s) in RCA: 177] [Impact Index Per Article: 59.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/03/2020] [Indexed: 06/12/2023]
Abstract
Polyphenols, the phenolic hydroxyl group-containing organic molecules, are widely found in natural plants and have shown beneficial effects on human health. Recently, polyphenol-containing nanoparticles have attracted extensive research attention due to their antioxidation property, anticancer activity, and universal adherent affinity, and thus have shown great promise in the preparation, stabilization, and modification of multifunctional nanoassemblies for bioimaging, therapeutic delivery, and other biomedical applications. Additionally, the metal-polyphenol networks, formed by the coordination interactions between polyphenols and metal ions, have been used to prepare an important class of polyphenol-containing nanoparticles for surface modification, bioimaging, drug delivery, and disease treatments. By focusing on the interactions between polyphenols and different materials (e.g., metal ions, inorganic materials, polymers, proteins, and nucleic acids), a comprehensive review on the synthesis and properties of the polyphenol-containing nanoparticles is provided. Moreover, the remarkable versatility of polyphenol-containing nanoparticles in different biomedical applications, including biodetection, multimodal bioimaging, protein and gene delivery, bone repair, antibiosis, and cancer theranostics is also demonstrated. Finally, the challenges faced by future research regarding the polyphenol-containing nanoparticles are discussed.
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Affiliation(s)
- Yuxin Guo
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical EngineeringSoutheast University, 2 Sipailou Road, Nanjing, 210096, P. R. China
| | - Qing Sun
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical EngineeringSoutheast University, 2 Sipailou Road, Nanjing, 210096, P. R. China
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical EngineeringSoutheast University, 2 Sipailou Road, Nanjing, 210096, P. R. China
| | - Yunlu Dai
- Cancer Centre, Faculty of Health Sciences, University of Macau, Macau SAR, P. R. China
| | - Xiaoyuan Chen
- Yong Loo Lin School of Medicine and Faculty of Engineering, National University of Singapore, Singapore, 119077, Singapore
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124
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Jiang Y, Jiang Z, Ma L, Huang Q. Advances in Nanodelivery of Green Tea Catechins to Enhance the Anticancer Activity. Molecules 2021; 26:3301. [PMID: 34072700 PMCID: PMC8198522 DOI: 10.3390/molecules26113301] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 12/12/2022] Open
Abstract
Cancer is one of the leading causes of death globally. A variety of phenolic compounds display preventative and therapeutic effects against cancers. Green teas are rich in phenolics. Catechins are the most dominant phenolic component in green teas. Studies have shown that catechins have anticancer activity in various cancer models. The anticancer activity of catechins, however, may be compromised due to their low oral bioavailability. Nanodelivery emerges as a promising way to improve the oral bioavailability and anticancer activity of catechins. Research in this area has been actively conducted in recent decades. This review provides the molecular mechanisms of the anticancer effects of catechins, the factors that limit the oral bioavailability of catechins, and the latest advances of delivering catechins using nanodelivery systems through different routes to enhance their anticancer activity.
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Affiliation(s)
- Yike Jiang
- Shenzhen Bay Laboratory, Institute of Biomedical Health Technology and Engineering, Shenzhen 518132, China;
| | - Ziyi Jiang
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
- State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Lan Ma
- Shenzhen Bay Laboratory, Institute of Biomedical Health Technology and Engineering, Shenzhen 518132, China;
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
- State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Qingrong Huang
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901, USA
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125
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Sun L, Zhang H, Gao P. Metabolic reprogramming and epigenetic modifications on the path to cancer. Protein Cell 2021; 13:877-919. [PMID: 34050894 PMCID: PMC9243210 DOI: 10.1007/s13238-021-00846-7] [Citation(s) in RCA: 203] [Impact Index Per Article: 67.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 04/02/2021] [Indexed: 02/07/2023] Open
Abstract
Metabolic rewiring and epigenetic remodeling, which are closely linked and reciprocally regulate each other, are among the well-known cancer hallmarks. Recent evidence suggests that many metabolites serve as substrates or cofactors of chromatin-modifying enzymes as a consequence of the translocation or spatial regionalization of enzymes or metabolites. Various metabolic alterations and epigenetic modifications also reportedly drive immune escape or impede immunosurveillance within certain contexts, playing important roles in tumor progression. In this review, we focus on how metabolic reprogramming of tumor cells and immune cells reshapes epigenetic alterations, in particular the acetylation and methylation of histone proteins and DNA. We also discuss other eminent metabolic modifications such as, succinylation, hydroxybutyrylation, and lactylation, and update the current advances in metabolism- and epigenetic modification-based therapeutic prospects in cancer.
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Affiliation(s)
- Linchong Sun
- Guangzhou First People's Hospital, School of Medicine, Institutes for Life Sciences, South China University of Technology, Guangzhou, 510006, China.
| | - Huafeng Zhang
- The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, 230027, China. .,CAS Centre for Excellence in Cell and Molecular Biology, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China.
| | - Ping Gao
- Guangzhou First People's Hospital, School of Medicine, Institutes for Life Sciences, South China University of Technology, Guangzhou, 510006, China. .,School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou, 510006, China. .,Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, 510005, China.
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126
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Suganuma M, Rawangkan A, Wongsirisin P, Kobayashi N, Matsuzaki T, Yoshikawa HY, Watanabe T. Stiffening of Cancer Cell Membranes Is a Key Biophysical Mechanism of Primary and Tertiary Cancer Prevention with Green Tea Polyphenols. Chem Pharm Bull (Tokyo) 2021; 68:1123-1130. [PMID: 33268644 DOI: 10.1248/cpb.c20-00300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Over the past 30 years, research of green tea polyphenols, especially (-)-epigallocatechin gallate (EGCG), has revealed that consumption of green tea is a practical and effective primary cancer prevention method for the general population. More recently, we believe that green tea polyphenols are beneficial for tertiary cancer prevention using green tea alone or combined with anticancer drugs because EGCG has the potential to inhibit metastatic progression and stemness, and enhance antitumor immunity. In an effort to identify a common underlying mechanism responsible for EGCG's multifunctional effects on various molecular targets, we studied the biophysical effects of EGCG on cell stiffness using atomic force microscopy. We found that EGCG acts to stiffen the membranes of cancer cells, leading to inhibition of signaling pathways of various receptors. Stiffening of membranes with EGCG inhibited AXL receptor tyrosine kinase, a stimulator of cell softening, motility and stemness, and expression of programmed cell death-ligand 1. This review covers the following: i) primary cancer prevention using EGCG or green tea, ii) tertiary cancer prevention by combining EGCG and anticancer drugs, iii) inhibition of metastasis with EGCG by stiffening the cell membrane, iv) inhibition of AXL receptor tyrosine kinase, a stimulator of cell softening and motility, with EGCG, v) inhibition of stemness properties with EGCG, and vi) EGCG as an alternative chemical immune checkpoint inhibitor. Development of new drugs that enhance stiffening of cancer cell membranes may be an effective strategy for tertiary cancer prevention and treatment.
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Affiliation(s)
- Masami Suganuma
- Graduate School of Science and Engineering, Saitama University.,Research Institute for Clinical Oncology, Saitama Cancer Center
| | - Anchalee Rawangkan
- Graduate School of Science and Engineering, Saitama University.,Research Institute for Clinical Oncology, Saitama Cancer Center
| | - Pattama Wongsirisin
- Graduate School of Science and Engineering, Saitama University.,Research Institute for Clinical Oncology, Saitama Cancer Center
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127
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Li T, Copeland C, Le A. Glutamine Metabolism in Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1311:17-38. [PMID: 34014532 DOI: 10.1007/978-3-030-65768-0_2] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Metabolism is a fundamental process for all cellular functions. For decades, there has been growing evidence of a relationship between metabolism and malignant cell proliferation. Unlike normal differentiated cells, cancer cells have reprogrammed metabolism in order to fulfill their energy requirements. These cells display crucial modifications in many metabolic pathways, such as glycolysis and glutaminolysis, which include the tricarboxylic acid (TCA) cycle, the electron transport chain (ETC), and the pentose phosphate pathway (PPP) [1]. Since the discovery of the Warburg effect, it has been shown that the metabolism of cancer cells plays a critical role in cancer survival and growth. More recent research suggests that the involvement of glutamine in cancer metabolism is more significant than previously thought. Glutamine, a nonessential amino acid with both amine and amide functional groups, is the most abundant amino acid circulating in the bloodstream [2]. This chapter discusses the characteristic features of glutamine metabolism in cancers and the therapeutic options to target glutamine metabolism for cancer treatment.
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Affiliation(s)
- Ting Li
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - Anne Le
- Department of Pathology and Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,Department of Chemical and Biomolecular Engineering, Johns Hopkins University Whiting School of Engineering, Baltimore, MD, USA.
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128
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Han S, Abiko Y, Washio J, Luo Y, Zhang L, Takahashi N. Green Tea-Derived Epigallocatechin Gallate Inhibits Acid Production and Promotes the Aggregation of Streptococcus mutans and Non-Mutans Streptococci. Caries Res 2021; 55:205-214. [PMID: 34010838 DOI: 10.1159/000515814] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 03/07/2021] [Indexed: 11/19/2022] Open
Abstract
It has been suggested that green tea-derived epigallocatechin gallate (EGCG), which has antimicrobial properties, might help prevent dental caries. However, the detailed properties of EGCG remain unclear. In this study, the antimicrobial properties of EGCG were evaluated by examining its bactericidal activity, its inhibitory effects against bacterial growth, acid production, acidic end-product formation, and sugar uptake (phosphoenolpyruvate-dependent phosphotransferase system, PEP-PTS activity), and its effects on bacterial aggregation, using monocultured planktonic cells of Streptococcus mutans and non-mutans streptococci. Coincubating S. mutans with EGCG (1 mg/mL) for 4 h had no bactericidal effects, while it decreased the growth and acid production of S. mutans by inhibiting the activity of the PEP-PTS. EGCG (2 mg/mL) caused rapid bacterial cell aggregation and had reduced the optical density of S. mutans cell suspension by 86.7% at pH 7.0 and 90.7% at pH 5.5 after 2 h. EGCG also reduced the acid production of non-mutans streptococci, including S. sanguinis, S. gordonii, and S. salivarius, and promoted the aggregation of these non-mutans streptococci. Furthermore, these antimicrobial effects of short-term EGCG treatment persisted in the presence of saliva. These results suggest that EGCG might have short-term antibacterial effects on caries-associated streptococci in the oral cavity.
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Affiliation(s)
- Sili Han
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Department of Cariology and Endodontics, Sichuan University West China School of Stomatology, Chengdu, China
| | - Yuki Abiko
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Jumpei Washio
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yufang Luo
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Department of Cariology and Endodontics, Fujian Medical University School of Stomatology, Fuzhou, China
| | - Linglin Zhang
- Department of Cariology and Endodontics, Sichuan University West China School of Stomatology, Chengdu, China
| | - Nobuhiro Takahashi
- Division of Oral Ecology and Biochemistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
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129
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Fu JY, Jiang CX, Wu MY, Mei RY, Yang AF, Tao HP, Chen XJ, Zhang J, Huang L, Zhao XF. Theabrownin Induces Cell Apoptosis and Cell Cycle Arrest of Oligodendroglioma and Astrocytoma in Different Pathways. Front Pharmacol 2021; 12:664003. [PMID: 33995088 PMCID: PMC8119995 DOI: 10.3389/fphar.2021.664003] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/12/2021] [Indexed: 12/09/2022] Open
Abstract
Theabrownin (TB), a natural compound present in the fresh leaves of green tea, is a potential antitumor agent. However, so far whether and how TB affects glioma is unclear. In this study, we investigated the effect of TB on astroglioma and oligodendroglioma cells. Surprisingly, TB significantly reduced the viabilities of HOG and U251 cells in a dose-dependent manner, which was accompanied by the upregulation of active-Casp-3, Bax, and PTEN; meanwhile, the antiapoptotic gene Bcl-2 was downregulated. In addition, TB treatment induced cell cycle arrest at the G1 and G2/M phases in HOG and U251 cells, respectively. TB treatment caused the downregulating of c-myc, cyclin D, CDK2, and CDK4 and upregulating of p21 and p27 in the HOG cell, while TB increased P53, p21, and p27 levels and decreased the levels of cell cycle regulator proteins such as CDK and cyclin A/B in the U251 cells. Therefore, the c-myc- and P53-related mechanisms were proposed for cell cycle arrest in these two glioma cell lines, respectively. Overall, our findings indicated that TB could be a novel candidate drug for the treatment of gliomas.
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Affiliation(s)
- J Y Fu
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - C X Jiang
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - M Y Wu
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - R Y Mei
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - A F Yang
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - H P Tao
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - X J Chen
- Department of Physiology, Research Center of Neuroscience, College of Basic Medical Science, Chongqing Medical University, Chongqing, China
| | - J Zhang
- Theabio Co., Ltd., Hangzhou, China
| | - L Huang
- Department of Horticulture, Zhejiang University, Hangzhou, China
| | - X F Zhao
- Institute of Developmental and Regenerative Biology, Zhejiang Key Laboratory of Organ Development and Regeneration, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
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130
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Della Via FI, Shiraishi RN, Santos I, Ferro KP, Salazar-Terreros MJ, Franchi Junior GC, Rego EM, Saad STO, Torello CO. (-)-Epigallocatechin-3-gallate induces apoptosis and differentiation in leukaemia by targeting reactive oxygen species and PIN1. Sci Rep 2021; 11:9103. [PMID: 33907248 PMCID: PMC8079435 DOI: 10.1038/s41598-021-88478-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 03/01/2021] [Indexed: 02/02/2023] Open
Abstract
(-)-Epigallocatechin-3-gallate (EGCG), the major active polyphenol extracted from green tea, has been shown to induce apoptosis and inhibit cell proliferation, cell invasion, angiogenesis and metastasis. Herein, we evaluated the in vivo effects of EGCG in acute myeloid leukaemia (AML) using an acute promyelocytic leukaemia (APL) experimental model (PML/RARα). Haematological analysis revealed that EGCG treatment reversed leucocytosis, anaemia and thrombocytopenia, and prolonged survival of PML/RARα mice. Notably, EGCG reduced leukaemia immature cells and promyelocytes in the bone marrow while increasing mature myeloid cells, possibly due to apoptosis increase and cell differentiation. The reduction of promyelocytes and neutrophils/monocytes increase detected in the peripheral blood, in addition to the increased percentage of bone marrow cells with aggregated promyelocytic leukaemia (PML) bodies staining and decreased expression of PML-RAR oncoprotein corroborates our results. In addition, EGCG increased expression of neutrophil differentiation markers such as CD11b, CD14, CD15 and CD66 in NB4 cells; and the combination of all-trans retinoic acid (ATRA) plus EGCG yield higher increase the expression of CD15 marker. These findings could be explained by a decrease of peptidyl-prolyl isomerase NIMA-interacting 1 (PIN1) expression and reactive oxygen species (ROS) increase. EGCG also decreased expression of substrate oncoproteins for PIN1 (including cyclin D1, NF-κB p65, c-MYC, and AKT) and 67 kDa laminin receptor (67LR) in the bone marrow cells. Moreover, EGCG showed inhibition of ROS production in NB4 cells in the presence of N-acetyl-L-cysteine (NAC), as well as a partial blockage of neutrophil differentiation and apoptosis, indicating that EGCG-activities involve/or are in response of oxidative stress. Furthermore, apoptosis of spleen cells was supported by increasing expression of BAD and BAX, parallel to BCL-2 and c-MYC decrease. The reduction of spleen weights of PML/RARα mice, as well as apoptosis induced by EGCG in NB4 cells in a dose-dependent manner confirms this assumption. Our results support further evaluation of EGCG in clinical trials for AML, since EGCG could represent a promising option for AML patient ineligible for current mainstay treatments.
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Affiliation(s)
- Fernanda Isabel Della Via
- grid.411087.b0000 0001 0723 2494Haematology and Transfusion Medicine Centre – Hemocentro, University of Campinas, Campinas, 13083-878 Brazil
| | - Rodrigo Naoto Shiraishi
- grid.411087.b0000 0001 0723 2494Haematology and Transfusion Medicine Centre – Hemocentro, University of Campinas, Campinas, 13083-878 Brazil
| | - Irene Santos
- grid.411087.b0000 0001 0723 2494Haematology and Transfusion Medicine Centre – Hemocentro, University of Campinas, Campinas, 13083-878 Brazil
| | - Karla Priscila Ferro
- grid.411087.b0000 0001 0723 2494Haematology and Transfusion Medicine Centre – Hemocentro, University of Campinas, Campinas, 13083-878 Brazil
| | - Myriam Janeth Salazar-Terreros
- grid.411087.b0000 0001 0723 2494Haematology and Transfusion Medicine Centre – Hemocentro, University of Campinas, Campinas, 13083-878 Brazil
| | - Gilberto Carlos Franchi Junior
- grid.411087.b0000 0001 0723 2494Onco-Haematological Child Centre, Faculty of Medical Sciences, University of Campinas, Campinas, 13083-970 Brazil
| | - Eduardo Magalhães Rego
- grid.11899.380000 0004 1937 0722Haematology and Clinical Oncology Division, Department of Internal Medicine, University of São Paulo, Ribeirão Preto, 14048-900 Brazil
| | - Sara Teresinha Olalla Saad
- grid.411087.b0000 0001 0723 2494Haematology and Transfusion Medicine Centre – Hemocentro, University of Campinas, Campinas, 13083-878 Brazil
| | - Cristiane Okuda Torello
- grid.411087.b0000 0001 0723 2494Haematology and Transfusion Medicine Centre – Hemocentro, University of Campinas, Campinas, 13083-878 Brazil
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131
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Han J, Cui Y, Gu Z, Yang D. Controllable assembly/disassembly of polyphenol-DNA nanocomplex for cascade-responsive drug release in cancer cells. Biomaterials 2021; 273:120846. [PMID: 33930736 DOI: 10.1016/j.biomaterials.2021.120846] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 04/07/2021] [Accepted: 04/16/2021] [Indexed: 12/31/2022]
Abstract
Developing nanocarrier systems with sufficient drug loading ability and efficient drug release behavior in cells is a powerful strategy to maximize therapeutic efficacies and minimize side effects of administered drugs. However, the two aspects are usually contradictory in a single nanocarrier. Herein, polyphenol-DNA nanocomplex with controllable assembly/disassembly behaviors is developed for responsive and sequential drug release in cancer cells. Programmable assembly of branched-DNA achieves multiple-gene loading, afterwards tannic acid (TA), plant-derived polyphenols as drugs mediate assembly of branched-DNA to form nanocomplex. Intracellularly, two-step disassembly process of nanocomplex enables efficient gene/drug release. Lysosomal acidic microenvironment induces the disassembly of nanocomplex to release TA and branched-DNA. Glutathione and DNase I in cytoplasm trigger the precise release of genes from branched-DNA. The efficacy of multiple-gene/chemo-therapy is demonstrated using in vitro and in vivo models. This work provides a controllable assembly/disassembly route to resolve the conflict between sufficient drug loading and efficient drug release in cells for therapeutics.
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Affiliation(s)
- Jinpeng Han
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China
| | - Yuchen Cui
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China
| | - Zi Gu
- School of Chemical Engineering and Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Dayong Yang
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China.
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132
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Shojaei-Zarghani S, Rafraf M, Yari-Khosroushahi A. Theanine and cancer: A systematic review of the literature. Phytother Res 2021; 35:4782-4794. [PMID: 33891786 DOI: 10.1002/ptr.7110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 02/23/2021] [Accepted: 03/23/2021] [Indexed: 12/12/2022]
Abstract
A growing literature indicates several health benefits of theanine, a major nonprotein derivative amino acid special to tea, and a nonedible mushroom. This study aimed to systematically review the scientific evidence regarding the anticarcinogen and anticancer effects of natural theanine. A systematic search for the relevant articles published until January 2021 on MEDLINE, Scopus, and Web of Knowledge was conducted. Out of 377 initial records, 14 in vitro, ex vivo, and in vivo studies met our inclusion criteria. Most of the included in vitro and ex vivo studies reported beneficial effects of theanine on the proliferation, apoptosis, metastasis, migration, and invasion in various cancer cell lines. The in vivo studies also supported the potential impacts of theanine on cancer incidence or progression. Theanine exerted its anticancer function by inhibiting EGFR, VEGFR, Met, and Akt/mTOR, JAK2/STAT3, and ERK/NFκB pathways, as well as activating the intrinsic apoptosis pathway and caspase-independent programmed cell death. In conclusion, the results indicated moderate apoptotic, antimetastatic, antimigration, and anti-invasion effects, along with the mild antiproliferative influence of theanine on cancer. Further studies are necessary to ascertain the effectiveness of theanine on the prevention and suppression of cancer and shed light upon the attributable mechanisms in the in vivo condition.
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Affiliation(s)
- Sara Shojaei-Zarghani
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Nutrition Research Center, Department of Community Nutrition, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran.,Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Rafraf
- Nutrition Research Center, Department of Community Nutrition, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ahmad Yari-Khosroushahi
- Drug Applied Research Center, Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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133
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Lee F, Bae KH, Ng S, Yamashita A, Kurisawa M. Hyaluronic acid-green tea catechin conjugates as a potential therapeutic agent for rheumatoid arthritis. RSC Adv 2021; 11:14285-14294. [PMID: 35423998 PMCID: PMC8697692 DOI: 10.1039/d1ra01491a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 03/30/2021] [Indexed: 11/21/2022] Open
Abstract
Fibroblast-like synoviocytes are a key effector cell type involved in the pathogenesis of rheumatoid arthritis. The major green tea catechin, epigallocatechin-3-O-gallate (EGCG), has attracted significant interest for rheumatoid arthritis therapy because of its ability to suppress the proliferation and interleukin-6 secretion of synoviocytes. However, therapeutic efficacy of EGCG has been limited by a lack of target cell specificity. Herein we report hyaluronic acid-EGCG (HA-EGCG) conjugates as an anti-arthritic agent that is capable of targeting fibroblast-like synoviocytes via HA-CD44 interactions. These conjugates exhibited superior anti-proliferative and anti-inflammatory activities compared with EGCG under simulated physiological conditions. Near-infrared fluorescence imaging revealed preferential accumulation of the conjugates at inflamed joints in a collagen-induced arthritis rat model, and their anti-arthritic efficacy was investigated by measuring a change in the edema and histopathological scores. Our findings suggest the potential of HA-EGCG conjugates as an anti-arthritic agent for the treatment of rheumatoid arthritis.
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Affiliation(s)
- Fan Lee
- Institute of Bioengineering and Bioimaging 31 Biopolis Way, The Nanos Singapore 138669 Singapore +65-6478-9083 +65-6824-7139
| | - Ki Hyun Bae
- Institute of Bioengineering and Bioimaging 31 Biopolis Way, The Nanos Singapore 138669 Singapore +65-6478-9083 +65-6824-7139
| | - Shengyong Ng
- Institute of Bioengineering and Bioimaging 31 Biopolis Way, The Nanos Singapore 138669 Singapore +65-6478-9083 +65-6824-7139
| | - Atsushi Yamashita
- Institute of Bioengineering and Bioimaging 31 Biopolis Way, The Nanos Singapore 138669 Singapore +65-6478-9083 +65-6824-7139
| | - Motoichi Kurisawa
- Institute of Bioengineering and Bioimaging 31 Biopolis Way, The Nanos Singapore 138669 Singapore +65-6478-9083 +65-6824-7139
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134
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Zhao LG, Li ZY, Feng GS, Ji XW, Tan YT, Li HL, Gunter MJ, Xiang YB. Tea Drinking and Risk of Cancer Incidence: A Meta-Analysis of Prospective Cohort Studies and Evidence Evaluation. Adv Nutr 2021; 12:402-412. [PMID: 33002099 PMCID: PMC8009746 DOI: 10.1093/advances/nmaa117] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/23/2020] [Accepted: 08/28/2020] [Indexed: 11/13/2022] Open
Abstract
Here we provide a comprehensive meta-analysis to summarize and appraise the quality of the current evidence on the associations of tea drinking in relation to cancer risk. PubMed, Embase, and the Cochrane Database of Systematic Reviews were searched up to June 2020. We reanalyzed the individual prospective studies focused on associations between tea drinking and cancer risk in humans. We conducted a meta-analysis of prospective studies and provided the highest- versus lowest-category analyses, dose-response analyses, and test of nonlinearity of each association by modeling restricted cubic spline regression for each type of tea. We graded the evidence based on the summary effect size, its 95% confidence interval, 95% prediction interval, the extent of heterogeneity, evidence of small-study effects, and excess significance bias. We identified 113 individual studies investigating the associations between tea drinking and 26 cancer sites including 153,598 cancer cases. We assessed 12 associations for the intake of black tea with cancer risk and 26 associations each for the intake of green tea and total tea with cancer risk. Except for an association between lymphoid neoplasms with green tea, we did not find consistent associations for the highest versus lowest categories and dose-response analyses for any cancer. When grading current evidence for each association (number of studies ≥2), weak evidence was detected for lymphoid neoplasm (green tea), glioma (total tea, per 1 cup), bladder cancer (total tea, per 1 cup), and gastric and esophageal cancer (tea, per 1 cup). This review of prospective studies provides little evidence to support the hypothesis that tea drinking is associated with cancer risk. More well-designed studies are still needed to identify associations between tea intake and rare cancers.
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Affiliation(s)
- Long-Gang Zhao
- State Key Laboratory of Oncogene and Related Genes and Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Zhuo-Ying Li
- State Key Laboratory of Oncogene and Related Genes and Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Guo-Shan Feng
- State Key Laboratory of Oncogene and Related Genes and Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiao-Wei Ji
- State Key Laboratory of Oncogene and Related Genes and Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yu-Ting Tan
- State Key Laboratory of Oncogene and Related Genes and Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Hong-Lan Li
- State Key Laboratory of Oncogene and Related Genes and Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Marc J Gunter
- Section of Nutrition and Metabolism, International Agency for Research on Cancer, Lyon, France
| | - Yong-Bing Xiang
- State Key Laboratory of Oncogene and Related Genes and Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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135
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Yi Z, Cui X, Chen G, Chen X, Jiang X, Li X. Biocompatible, Antioxidant Nanoparticles Prepared from Natural Renewable Tea Polyphenols and Human Hair Keratins for Cell Protection and Anti-inflammation. ACS Biomater Sci Eng 2021; 7:1046-1057. [PMID: 33512989 DOI: 10.1021/acsbiomaterials.0c01616] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Excessive reactive oxygen species (ROS) can cause oxidative stress of tissues and adversely influence homeostasis of the body. Epigallocatechin gallate (EGCG) with an antioxidative effect can effectively eliminate the ROS, but an evident weakness associated with it is the relatively poor cytocompatibility. Combining with other biomacromolecules such as human hair keratin (KE) and using nanotechnology to prepare nanoparticles can improve this situation. By covalent bonding, we assembled KE and EGCG into KE-EGCG nanoparticles (NANO) with size of about 50 nm and characterized them by DLS, UV, FTIR, NMR, and XPS. Free radical scavenging experiments show that antioxidant properties of the obtained NANO are superior to that of vitamin C. Cell culture experiments also show that the NANO can effectively protect the proliferation of L929 cells and HUVEC cells. In addition, we also used RAW264.7 cells to establish a H2O2-induced cell injury model and an lipopolysaccharide-induced cellular inflammatory model to evaluate the antioxidant and anti-inflammatory properties of NANO. The results show that the NANO can effectively prevent cells from oxidative damage and reduce inflammatory expression of the cells, indicating that the NANO have a good antioxidative and anti-inflammatory effect on cells which can be applied to many diseases related to oxidative stress.
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Affiliation(s)
- Zeng Yi
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, P. R. China.,College of Biomedical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Xinxing Cui
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, P. R. China.,College of Biomedical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Guangcan Chen
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, P. R. China.,College of Biomedical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Xiangyu Chen
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, P. R. China.,College of Biomedical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Xian Jiang
- Department of Dermatology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu 610041, P. R. China
| | - Xudong Li
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, P. R. China.,College of Biomedical Engineering, Sichuan University, Chengdu 610064, P. R. China
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136
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Association between dietary flavonoid intakes and C-reactive protein levels: a cross-sectional study in Taiwan. J Nutr Sci 2021; 10:e15. [PMID: 33889398 PMCID: PMC8057367 DOI: 10.1017/jns.2021.8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 01/13/2021] [Accepted: 02/09/2021] [Indexed: 11/24/2022] Open
Abstract
Although the intake of specific flavonoid-rich foods may reduce C-reactive protein (CRP) levels, the association between dietary flavonoid intakes and CRP is inconsistent. We aim to describe dietary flavonoid intakes in a Taiwanese nationally representative sample and to investigate the association between flavonoid intakes and CRP. We conducted a cross-sectional study based on 2592 adults from the Nutrition and Health Survey in Taiwan 2005–8. Flavonoid intakes were estimated by linking the 24-h dietary recall with the U.S. Department of Agriculture flavonoid database and divided into quartiles. Adjusted estimates of the flavonoid intakes for the continuous and binary (elevated CRP: >0⋅3 mg/dl) variables were performed by using general linear and logistic regression. We found that tea, orange, tofu and sweet potato leaves/water spinach constituted the major food items of the total flavonoid intake. The total flavonoid intake was lower among women and elderly. Compared with the lowest total flavonoid intake quartile, participants in higher quartiles were associated with a lower CRP status (adjusted odds ratio (OR): 0⋅61, 95 % confidence interval (CI): 0⋅44–0⋅86 for the highest quartiles). The trends were similar for flavonol and flavan-3-ol intakes. Compared with non-consumers, tea consumers were likely to have a lower CRP status (adjusted OR: 0⋅74, 95 % CI: 0⋅57–0⋅97). In brief, a higher total flavonoid intake and tea consumption were inversely associated with CRP levels, indicating that a high-flavonoid diet may contribute to anti-inflammatory effects. A Taiwanese flavonoid content table is necessary for conducting further studies related to flavonoids in Taiwan.
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Key Words
- BMI, body mass index
- C-reactive protein
- CI, confidence interval
- CRP, C-reactive protein
- Cross-sectional study
- DBP, diastolic blood pressure
- FDB-EXP, USDA's Expanded Flavonoid Database for the Assessment of Dietary Intakes
- Flavonoid-rich foods
- Flavonoids
- HDL, high-density lipoprotein
- LDL, low-density lipoprotein
- NAHSIT 2005-8, Nutrition and Health Survey in Taiwan 2005–2008
- OR, odds ratio
- SBP, systolic blood pressure
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137
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Li H, Li Y, Hu J, Liu S, Luo X, Tang M, Bode AM, Dong Z, Liu X, Liao W, Cao Y. (-)-Epigallocatechin-3-gallate inhibits EBV lytic replication via targeting LMP1-mediated MAPK signal axes. Oncol Res 2021; 28:763-778. [PMID: 33629943 PMCID: PMC8420900 DOI: 10.3727/096504021x16135618512563] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Epstein–Barr virus (EBV)-encoded latent membrane protein 1 (LMP1) plays an important oncogenic role in the viral latent infection. Recently, increasing evidence indicates that the high expression of LMP1 during EBV lytic cycle is related to the viral lytic replication. However, the mechanism by which LMP1 regulates EBV lytic replication remains unclear. (−)-Epigallocatechin-3-gallate (EGCG) prevents carcinogenesis by directly targeting numerous membrane proteins and effectively inhibits EBV lytic cascade. Here, we demonstrated that LMP1 promotes EBV lytic replication through the downstream signal molecules MAPKs, including ERKs, p38, and JNKs. LMP1 induces the phosphorylation of p53 through MAPKs to enhance the ability of wild-type p53 (wt-p53) to activate expression of BZLF1 gene, while the JNKs/c-Jun signal axis appears to be involved in EBV lytic replication induced by LMP1 in p53 mutant manner. We provided the first evidence that EGCG directly targets the viral membrane LMP1 (Kd = 0.36 μM, n = 1) using fluorescence quenching, isothermal titration calorimetry (ITC) assay, and CNBR-activated Sepharose 4B pull-down affinity chromatography. Furthermore, we revealed that EGCG inhibits EBV lytic replication via suppressing LMP1 and thus blocking the downstream MAPKs/wt-p53 signal axis in AGS-EBV cells and JNKs/c-Jun signal axis in p53 mutant B95.8 cells. Our study, for the first time, reports the binding and inhibitory efficacy of EGCG to the LMP1, which is a key oncoprotein encoded by EBV. These findings suggest the novel function of LMP1 in the regulation of EBV lytic cycle and reveal the new role of EGCG in EBV-associated malignancies through suppressing viral reactivation.
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Affiliation(s)
- Hongde Li
- Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, Changsha, China
| | - Yueshuo Li
- Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, Changsha, China.,Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Jianmin Hu
- Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, Changsha, China.,Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Sufang Liu
- Division of Hematology, Institute of Molecular Hematology, the Second Xiangya 13 Hospital, Central South University at Changsha, China
| | - Xiangjian Luo
- Key Laboratory of Carcinogenesis, Chinese Ministry of Health, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, Changsha, China.,The Hormel Institute, University of Minnesota, Austin, MN 55912, USA
| | - Min Tang
- Key Laboratory of Carcinogenesis, Chinese Ministry of Health, Changsha, China.,Cancer Research Institute and School of Basic Medical Science, Xiangya School of Medicine, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Ann M Bode
- The Hormel Institute, University of Minnesota, Austin, MN 55912, USA
| | - Zigang Dong
- The Hormel Institute, University of Minnesota, Austin, MN 55912, USA.,College of Medicine, Zhengzhou University, Zhengzhou, China
| | - Xinqi Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University at Tianjin, China
| | - Weihua Liao
- Department of Radiology, Xiangya Hospital, Central South University at Changsha, China
| | - Ya Cao
- Key Laboratory of Carcinogenesis and Invasion, Chinese Ministry of Education, Department of Radiology, Xiangya Hospital, Central South University, Changsha, China.,Molecular Imaging Research Center of Central South University, Changsha, China.,Research Center for Technologies of Nucleic Acid Based Diagnostics and Therapeutics, Hunan Province, Changsha, China.,National Joint Engineering Research Center for Genetic Diagnostics of Infectious Diseases and Cancer, Changsha, China.,Key Laboratory of Carcinogenesis, Chinese Ministry of Health, Changsha, China
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138
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Proliferation of MDA-MB-231 can be suppressed by dimeric-epigallocatechin gallate through competitive inhibition of amphiregulin-epidermal growth factor receptor signaling. Anticancer Drugs 2021; 32:647-656. [PMID: 33587351 DOI: 10.1097/cad.0000000000001038] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Triple-negative breast cancer (TNBC) is highly aggressive, with high rates of early relapse and very poor overall prognosis. Amphiregulin (AREG) is the most abundant epidermal growth factor receptor (EGFR) agonist in MDA-MB-231 TNBC cells, whose proliferation can be inhibited by (-)-epigallocatechin gallate (EGCG), a constituent of green tea that is prone to oxidative polymerization. The effect of dimeric-EGCG, a dimer of oxidized and polymerized EGCG, on MDA-MB-231 cell the proliferation warrants further exploration. In the present study, MTT, flow cytometry, migration scratch, transwell, western blotting, and surface plasmon resonance assays were used to evaluate the effect of dimeric-EGCG on MDA-MB-231 cells and explore the underlying mechanism. MDA-MB-231 cell proliferation and migration were significantly inhibited by dimeric-EGCG at concentrations as low as 10 μM. Levels of EGFR and p44/42 MAPK phosphorylation in MDA-MB-231 cells were significantly reduced by treatment with 10 μM dimeric-EGCG (P < 0.01). In addition, the levels of phosphorylation induced by exogenous AREG were also inhibited by dimeric-EGCG (P < 0.01); however, no significant effects of dimeric-EGCG were observed on epidermal growth factor or transforming growth factor-alpha signaling. Surface plasmon resonance analysis demonstrated that 10 μM dimeric-EGCG bound directly to the extracellular domain of EGFR, competitively inhibiting the binding of AREG to EGFR. These results suggest a novel mechanism underlying the inhibitory effect of dimeric-EGCG on MDA-MB-231 cells, with potential application in the development of drugs for the treatment of TNBC.
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139
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Oxidation of Hydrogen Sulfide by Quinones: How Polyphenols Initiate Their Cytoprotective Effects. Int J Mol Sci 2021; 22:ijms22020961. [PMID: 33478045 PMCID: PMC7835830 DOI: 10.3390/ijms22020961] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/12/2021] [Accepted: 01/13/2021] [Indexed: 12/15/2022] Open
Abstract
We have shown that autoxidized polyphenolic nutraceuticals oxidize H2S to polysulfides and thiosulfate and this may convey their cytoprotective effects. Polyphenol reactivity is largely attributed to the B ring, which is usually a form of hydroxyquinone (HQ). Here, we examine the effects of HQs on sulfur metabolism using H2S- and polysulfide-specific fluorophores (AzMC and SSP4, respectively) and thiosulfate sensitive silver nanoparticles (AgNP). In buffer, 1,4-dihydroxybenzene (1,4-DB), 1,4-benzoquinone (1,4-BQ), pyrogallol (PG) and gallic acid (GA) oxidized H2S to polysulfides and thiosulfate, whereas 1,2-DB, 1,3-DB, 1,2-dihydroxy,3,4-benzoquinone and shikimic acid did not. In addition, 1,4-DB, 1,4-BQ, PG and GA also increased polysulfide production in HEK293 cells. In buffer, H2S oxidation by 1,4-DB was oxygen-dependent, partially inhibited by tempol and trolox, and absorbance spectra were consistent with redox cycling between HQ autoxidation and H2S-mediated reduction. Neither 1,2-DB, 1,3-DB, 1,4-DB nor 1,4-BQ reduced polysulfides to H2S in either 21% or 0% oxygen. Epinephrine and norepinephrine also oxidized H2S to polysulfides and thiosulfate; dopamine and tyrosine were ineffective. Polyphenones were also examined, but only 2,5-dihydroxy- and 2,3,4-trihydroxybenzophenones oxidized H2S. These results show that H2S is readily oxidized by specific hydroxyquinones and quinones, most likely through the formation of a semiquinone radical intermediate derived from either reaction of oxygen with the reduced quinones, or from direct reaction between H2S and quinones. We propose that polysulfide production by these reactions contributes to the health-promoting benefits of polyphenolic nutraceuticals.
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140
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Ohishi T, Fukutomi R, Shoji Y, Goto S, Isemura M. The Beneficial Effects of Principal Polyphenols from Green Tea, Coffee, Wine, and Curry on Obesity. Molecules 2021; 26:molecules26020453. [PMID: 33467101 PMCID: PMC7830344 DOI: 10.3390/molecules26020453] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/12/2021] [Accepted: 01/13/2021] [Indexed: 12/12/2022] Open
Abstract
Several epidemiological studies and clinical trials have reported the beneficial effects of green tea, coffee, wine, and curry on human health, with its anti-obesity, anti-cancer, anti-diabetic, and neuroprotective properties. These effects, which have been supported using cell-based and animal studies, are mainly attributed to epigallocatechin gallate found in green tea, chlorogenic acid in coffee, resveratrol in wine, and curcumin in curry. Polyphenols are proposed to function via various mechanisms, the most important of which is related to reactive oxygen species (ROS). These polyphenols exert conflicting dual actions as anti- and pro-oxidants. Their anti-oxidative actions help scavenge ROS and downregulate nuclear factor-κB to produce favorable anti-inflammatory effects. Meanwhile, pro-oxidant actions appear to promote ROS generation leading to the activation of 5′-AMP-activated protein kinase, which modulates different enzymes and factors with health beneficial roles. Currently, it remains unclear how these polyphenols exert either pro- or anti-oxidant effects. Similarly, several human studies showed no beneficial effects of these foods, and, by extension polyphenols, on obesity. These inconsistencies may be attributed to different confounding study factors. Thus, this review provides a state-of-the-art update on these foods and their principal polyphenol components, with an assumption that it prevents obesity.
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Affiliation(s)
- Tomokazu Ohishi
- Institute of Microbial Chemistry (BIKAKEN), Numazu, Microbial Chemistry Research Foundation, Shizuoka 410-0301, Japan
- Correspondence: ; Tel.: +81-55-924-0601
| | - Ryuuta Fukutomi
- Quality Management Div. Higuchi Inc., Minato-ku, Tokyo 108-0075, Japan;
| | - Yutaka Shoji
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; (Y.S.); (M.I.)
| | - Shingo Goto
- Division of Citrus Research, Institute of Fruit Tree and Tea Science, National Agriculture and Food Research Organization (NARO), Shimizu, Shizuoka 424-0292, Japan;
| | - Mamoru Isemura
- Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan; (Y.S.); (M.I.)
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141
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Fukutomi R, Ohishi T, Koyama Y, Pervin M, Nakamura Y, Isemura M. Beneficial Effects of Epigallocatechin-3- O-Gallate, Chlorogenic Acid, Resveratrol, and Curcumin on Neurodegenerative Diseases. Molecules 2021; 26:E415. [PMID: 33466849 PMCID: PMC7829779 DOI: 10.3390/molecules26020415] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 01/12/2021] [Accepted: 01/12/2021] [Indexed: 02/07/2023] Open
Abstract
Many observational and clinical studies have shown that consumption of diets rich in plant polyphenols have beneficial effects on various diseases such as cancer, obesity, diabetes, cardiovascular diseases, and neurodegenerative diseases (NDDs). Animal and cellular studies have indicated that these polyphenolic compounds contribute to such effects. The representative polyphenols are epigallocatechin-3-O-gallate in tea, chlorogenic acids in coffee, resveratrol in wine, and curcumin in curry. The results of human studies have suggested the beneficial effects of consumption of these foods on NDDs including Alzheimer's and Parkinson's diseases, and cellular animal experiments have provided molecular basis to indicate contribution of these representative polyphenols to these effects. This article provides updated information on the effects of these foods and their polyphenols on NDDs with discussions on mechanistic aspects of their actions mainly based on the findings derived from basic experiments.
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Affiliation(s)
- Ryuuta Fukutomi
- Quality Management Division, Higuchi Inc. Minato-ku, Tokyo 108-0075, Japan
| | - Tomokazu Ohishi
- Institute of Microbial Chemistry (BIKAKEN), Microbial Chemistry Research Foundation, Numazu, Shizuoka 410-0301, Japan;
| | - Yu Koyama
- Shizuoka Eiwa Gakuin University Junior College, Suruga-ku, Shizuoka 422-8545, Japan;
| | - Monira Pervin
- Tea Science Research Center, University of Shizuoka, Suruga-ku, Shizuoka 422-8526, Japan; (M.P.); (Y.N.)
| | - Yoriyuki Nakamura
- Tea Science Research Center, University of Shizuoka, Suruga-ku, Shizuoka 422-8526, Japan; (M.P.); (Y.N.)
| | - Mamoru Isemura
- Tea Science Research Center, University of Shizuoka, Suruga-ku, Shizuoka 422-8526, Japan; (M.P.); (Y.N.)
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142
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Li F, Qasim S, Li D, Dou QP. Updated review on green tea polyphenol epigallocatechin-3-gallate as a cancer epigenetic regulator. Semin Cancer Biol 2021; 83:335-352. [PMID: 33453404 DOI: 10.1016/j.semcancer.2020.11.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/26/2020] [Accepted: 11/26/2020] [Indexed: 02/06/2023]
Abstract
In-depth insights in cancer biology over the past decades have highlighted the important roles of epigenetic mechanisms in the initiation and progression of tumorigenesis. The cancer epigenome usually experiences multiple alternations, including genome-wide DNA hypomethylation and site-specific DNA hypermethylation, various histone posttranslational modifications, and dysregulation of non-coding RNAs (ncRNAs). These epigenetic changes are plastic and reversible, and could potentially occur in the early stage of carcinogenesis preceding genetic mutation, offering unique opportunities for intervention therapies. Therefore, targeting the cancer epigenome or cancer epigenetic dysregulation with some selected agents (called epi-drugs) represents an evolving and promising strategy for cancer chemoprevention and therapy. Phytochemicals, as a class of pleiotropic molecules, have manifested great potential in modulating different cancer processes through epigenetic machinery, of which green tea polyphenol epigallocatechin-3-gallate (EGCG) is one of the most extensively studied. In this review, we first summarize epigenetic events involved in the pathogenesis of cancer, including DNA/RNA methylations, histone modifications and ncRNAs' dysregulations. We then focus on the recently discovered roles of phytochemicals, with a special emphasis on EGCG, in modulating different cancer processes through regulating epigenetic machinery. We finally discuss limitations of EGCG as an epigenetic modulator for cancer chemoprevention and treatment and offer potential strategies to overcome the shortcomings.
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Affiliation(s)
- Feng Li
- College of Food Science and Engineering, Shandong Agricultural University, Tainan, 271018, China
| | - Syeda Qasim
- Departments of Oncology, Pharmacology & Pathology, School of Medicine, Barbara Ann Karmanos Cancer Institute, Wayne State University, Detroit, MI, 48201, USA; Ryerson University, Toronto, Ontario, M5B 2K3, Canada
| | - Dapeng Li
- College of Food Science and Engineering, Shandong Agricultural University, Tainan, 271018, China
| | - Q Ping Dou
- Departments of Oncology, Pharmacology & Pathology, School of Medicine, Barbara Ann Karmanos Cancer Institute, Wayne State University, Detroit, MI, 48201, USA.
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143
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Luo KW, Zhu XH, Zhao T, Zhong J, Gao HC, Luo XL, Huang WR. EGCG Enhanced the Anti-tumor Effect of Doxorubicine in Bladder Cancer via NF-κB/MDM2/p53 Pathway. Front Cell Dev Biol 2021; 8:606123. [PMID: 33425912 PMCID: PMC7793730 DOI: 10.3389/fcell.2020.606123] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/17/2020] [Indexed: 11/30/2022] Open
Abstract
Doxorubicin (DOX), the first-line chemotherapy for bladder cancer, usually induces side effects. We previously demonstrated that green tea polyphenol EGCG had potent anti-tumor effect in bladder cancer via down regulation of NF-κB. This study aimed to investigate the additive/synergistic effect EGCG and DOX against bladder cancer. Our results demonstrated that the combined use of DOX and EGCG inhibited T24 and SW780 cell proliferation. EGCG enhanced the apoptosis induction effect of DOX in both SW780 and T24 cells and resulted in significant differences. Besides, EGCG promoted the inhibitory effect of DOX against bladder cancer cell migration. In addition, the in vivo results demonstrated that DOX in combination with EGCG showed the most potent anti-tumor effects among DOX, EGCG and DOX+EGCG treatment groups. Further mechanistic studies determined that the combination of DOX and EGCG inhibited phosphorylated NF-κB and MDM2 expression, and up-regulated p53 expression in tumor, as assessed by western blot and immunohistochemistry. Western blot in SW780 cells also confirmed that the combined use of EGCG and DOX caused significant increase in p53, p21, and cleaved-PARP expression, and induced significant inhibition in phosphorylated NF-κB and MDM2. When NF-κB was inhibited, the expression of p53 and p-MDM2 were changed, and the combination of DOX and EGCG showed no obvious effect in transwell migration and cell viability. In conclusion, the novel application of chemotherapy DOX and EGCG demonstrated potent anti-tumor, anti-migration and anti-proliferation effects against bladder cancer. EGCG enhanced the anti-tumor effect of DOX in bladder cancer via NF-κB/MDM2/p53 pathway, suggesting the potential clinical application against bladder cancer patients.
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Affiliation(s)
- Ke-Wang Luo
- Key Laboratory, People's Hospital of Longhua, The Affiliated Hospital of Southern Medical University, Shenzhen, China.,Key Laboratory of Medical Programming Technology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Xiao-Hong Zhu
- Key Laboratory, People's Hospital of Longhua, The Affiliated Hospital of Southern Medical University, Shenzhen, China
| | - Ting Zhao
- Key Laboratory, People's Hospital of Longhua, The Affiliated Hospital of Southern Medical University, Shenzhen, China
| | - Jin Zhong
- Key Laboratory, People's Hospital of Longhua, The Affiliated Hospital of Southern Medical University, Shenzhen, China
| | - Han-Chao Gao
- Department of Nephrology, Shenzhen Longhua District Central Hospital, Affiliated Central Hospital of Shenzhen Longhua District, Guangdong Medical University, Shenzhen, China
| | - Xin-Le Luo
- Key Laboratory, People's Hospital of Longhua, The Affiliated Hospital of Southern Medical University, Shenzhen, China
| | - Wei-Ren Huang
- Key Laboratory of Medical Programming Technology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
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144
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Mao YL, Wang JQ, Chen GS, Granato D, Zhang L, Fu YQ, Gao Y, Yin JF, Luo LX, Xu YQ. Effect of chemical composition of black tea infusion on the color of milky tea. Food Res Int 2021; 139:109945. [DOI: 10.1016/j.foodres.2020.109945] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 11/05/2020] [Accepted: 11/27/2020] [Indexed: 11/17/2022]
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145
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Kochman J, Jakubczyk K, Antoniewicz J, Mruk H, Janda K. Health Benefits and Chemical Composition of Matcha Green Tea: A Review. Molecules 2020; 26:E85. [PMID: 33375458 PMCID: PMC7796401 DOI: 10.3390/molecules26010085] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 12/25/2022] Open
Abstract
Japanese matcha is a type of powdered green tea, grown in a traditional way. Shading of the plants during the growth period enhances the processes of synthesis and accumulation of biologically active compounds, including theanine, caffeine, chlorophyll and various types of catechins. Green tea contains four main catechins, i.e., (-)-epicatechin (EC), (-)-epicatechin-3-gallate (ECG), (-)-epigallocatechin (EGC) and (-)-epigallocatechin-3-gallate (EGCG), of which the latter is the most active and abundant and matcha is their best condensed source. Due to its unique chemical composition and prized flavour, which sets it apart from other tea beverages, it is considered the highest quality tea. Its health-promoting properties are attributed to the high content of antioxidant and anti-inflammatory substances. Studies confirming the high antioxidant potential of tea beverages claim that it originates from the considerable content of catechins, a type of phenolic compound with beneficial effects on human health. Due to its potential for preventing many diseases and supporting cognitive function, regular consumption of matcha may have a positive effect on both physical and mental health. The aim of this review was to compile the health benefits of matcha tea. It is the first such review to be undertaken, and presents its main bioactive compounds in a systematic manner.
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Affiliation(s)
| | - Karolina Jakubczyk
- Department of Human Nutrition and Metabolomics, Pomeranian Medical University, 24 Broniewskiego Street, 71-460 Szczecin, Poland; (J.K.); (J.A.); (H.M.); (K.J.)
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146
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Izumi T, Terauchi M. The Diverse Efficacy of Food-Derived Proanthocyanidins for Middle-Aged and Elderly Women. Nutrients 2020; 12:nu12123833. [PMID: 33334009 PMCID: PMC7765374 DOI: 10.3390/nu12123833] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/04/2020] [Accepted: 12/12/2020] [Indexed: 12/21/2022] Open
Abstract
Middle-aged and elderly women are affected by various symptoms and diseases induced by estrogen deficiency. Proanthocyanidins, widely present in many kinds of fruits and berries, have many beneficial effects, such as antioxidative, anti-inflammatory, and antimicrobial activities. We researched the effects of proanthocyanidins for middle-aged and elderly women, finding that it has been revealed in many clinical trials and cohort studies that proanthocyanidins contribute to the prevention of cardiovascular disease, hypertension, obesity, cancer, osteoporosis, and urinary tract infection, as well as the improvement of menopausal symptoms, renal function, and skin damage. Thus, proanthocyanidins can be considered one of the potent representatives of complementary alternative therapy.
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Affiliation(s)
- Toru Izumi
- Department of Production and Quality Control, Kikkoman Nutricare Japan Incorporation, Nihonbashikoamicho 3-11, Chuo, Tokyo 103-0016, Japan
- Correspondence: ; Tel.: +81-3-5521-5138; Fax: +81-3-3660-9222
| | - Masakazu Terauchi
- Department of Women’s Health, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo, Tokyo 113-8510, Japan;
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147
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Feng R, Chang ET, Liu Q, Cai Y, Zhang Z, Chen G, Huang QH, Xie SH, Cao SM, Zhang Y, Yun JP, Jia WH, Zheng Y, Liao J, Chen Y, Huang T, Lin L, Ernberg I, Huang G, Zeng YX, Adami HO, Ye W. Intake of Alcohol and Tea and Risk of Nasopharyngeal Carcinoma: A Population-Based Case-Control Study in Southern China. Cancer Epidemiol Biomarkers Prev 2020; 30:545-553. [PMID: 33303643 DOI: 10.1158/1055-9965.epi-20-1244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/16/2020] [Accepted: 12/07/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The potential effect of alcohol or tea intake on the risk of nasopharyngeal carcinoma (NPC) remains controversial. METHODS In a population-based case-control study in southern China, we assessed alcohol or tea intake from 2,441 histopathologically confirmed NPC cases and 2,546 controls. We calculated mean daily ethanol (g/day) and tea intake (mL/day). Fully adjusted ORs with 95% confidence intervals (CI) were estimated using logistic regression; potential dose-response trends were evaluated using restricted cubic spline analysis. RESULTS Compared with nondrinkers, no significantly increased NPC risk in men was observed among current alcohol drinkers overall (OR, 1.08; 95% CI, 0.93-1.25), nor among current heavy drinkers (OR for ≥90 g/day ethanol vs. none, 1.32; 95% CI, 0.95-1.84) or former alcohol drinkers. Current tea drinking was associated with a decreased NPC risk (OR, 0.73; 95% CI, 0.64-0.84). Compared with never drinkers, those with the low first three quintiles of mean daily current intake of tea were at significantly lower NPC risk (OR, 0.53, 0.68, and 0.65, respectively), but not significant for the next two quintiles. Current daily tea intake had a significant nonlinear dose-response relation with NPC risk. CONCLUSIONS Our study suggests no significant association between alcohol and NPC risk. Tea drinking may moderately reduce NPC risk, but the lack of a monotonic dose-response association complicates causal inference. IMPACT Tea drinking might be a healthy habit for preventing NPC. More studies on biological mechanisms that may link tea with NPC risk are needed.
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Affiliation(s)
- Ruimei Feng
- Department of Cancer Prevention Center, Sun Yat-sen University Cancer Center, Guangzhou, China.,State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China.,Department of Epidemiology and Health Statistics and Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China
| | - Ellen T Chang
- Department of Cancer Prevention Center, Sun Yat-sen University Cancer Center, Guangzhou, China.,Exponent, Inc., Center for Health Sciences, Menlo Park, California.,Stanford Cancer Institute, Stanford, California
| | - Qing Liu
- Department of Cancer Prevention Center, Sun Yat-sen University Cancer Center, Guangzhou, China.,State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yonglin Cai
- Department of Clinical Laboratory, Wuzhou Red Cross Hospital, Wuzhou, China.,Wuzhou Health System Key Laboratory for Nasopharyngeal Carcinoma Etiology and Molecular Mechanism, Wuzhou, China
| | - Zhe Zhang
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Guomin Chen
- State Key Laboratory for Infectious Diseases Prevention and Control, Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | | | - Shang-Hang Xie
- Department of Cancer Prevention Center, Sun Yat-sen University Cancer Center, Guangzhou, China.,State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Su-Mei Cao
- Department of Cancer Prevention Center, Sun Yat-sen University Cancer Center, Guangzhou, China.,State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yu Zhang
- State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jing-Ping Yun
- State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Wei-Hua Jia
- State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yuming Zheng
- Department of Clinical Laboratory, Wuzhou Red Cross Hospital, Wuzhou, China.,Wuzhou Health System Key Laboratory for Nasopharyngeal Carcinoma Etiology and Molecular Mechanism, Wuzhou, China
| | - Jian Liao
- Cangwu Institute for Nasopharyngeal Carcinoma Control and Prevention, Wuzhou, China
| | - Yufeng Chen
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Tingting Huang
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Department of Radiation Oncology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Longde Lin
- Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Ingemar Ernberg
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Guangwu Huang
- Department of Otolaryngology-Head & Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Yi-Xin Zeng
- State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China.,Beijing Hospital, Beijing, China
| | - Hans-Olov Adami
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.,Clinical Effectiveness Group, Institute of Health University of Oslo, Oslo, Norway
| | - Weimin Ye
- Department of Cancer Prevention Center, Sun Yat-sen University Cancer Center, Guangzhou, China. .,State Key Laboratory of Oncology in South China and Collaborative Innovation Center for Cancer Medicine and Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China.,Department of Epidemiology and Health Statistics and Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, China.,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
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148
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Abstract
Black tea accounts for 70-80% of world tea production, and the polyphenols therein are produced by enzymatic oxidation of four tea catechins during tea fermentation. However, only limited groups of dimeric oxidation products, such as theaflavins, theasinensins, and theacitrins, have been isolated from black tea and chemically characterized. This is largely because of the complexity and heterogeneity of the oxidation products. To determine structures and production mechanisms of uncharacterized black tea polyphenols, in vitro model fermentation experiments using pure catechins and polyphenol oxidase have been applied, and basic oxidation mechanisms have been established. Contemporary methods, such as LC-MS, are also effective to identify catechin oxidation products in black tea. Despite ongoing efforts, almost 60% of the solids in black tea infusion remain uncharacterized. These compounds include the so-called thearubigins, which are a heterogeneous mixture of uncharacterized catechin oxidation products with oligomeric structures. This review summarizes the current knowledge of the production mechanisms of representative black tea polyphenols and presents recent progress in characterization of thearubigins.
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Affiliation(s)
- Takashi Tanaka
- Graduate School of Biomedical Sciences, Nagasaki University
| | - Yosuke Matsuo
- Graduate School of Biomedical Sciences, Nagasaki University
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149
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Nandy S, Dey A. Bibenzyls and bisbybenzyls of bryophytic origin as promising source of novel therapeutics: pharmacology, synthesis and structure-activity. Daru 2020; 28:701-734. [PMID: 32803687 PMCID: PMC7429097 DOI: 10.1007/s40199-020-00341-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 03/30/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The amphibian, non-vascular, gametophyte-dominant, bio-indicator class, bryophytes; with their wide ranges of habitat have attained importance due to their promising medicinal attributions and therapeutic role; mostly aided by presence of aromatic bibenzyl and bisbybenzyl class of compounds. Bibenzyls are steroidal ethane derivatives, resembling the structural moiety of bioactive dihydro-stilbenoids or iso-quinoline alkaloids. These stress triggered secondary metabolites are the by-products of the flavonoid biosynthetic pathway. Different classes of bryophytes (Bryophyta, Marchantiophyta and Anthocerotophyta) possess different subtypes of bibenzyls and dimeric bisbibenzyls. Among the liverwort, hornwort and mosses, former one is mostly enriched with bibenzyl type constituents as per the extensive study conducted for phytochemical deposit. Considering macrocyclic and acyclic group of bibenzyls and bisbybenzyls, generally marchantin type compounds are reported vividly for significant biological activity that includes neuro-nephro-cardio-protection besides anti-allergic, anti-microbial, anti-apoptotic and cytotoxic activities studied on in-vitro and in-vivo models or on cell lines. RESULT The critical analysis of reported chemical and pharmaceutical attributions of bibenzyls and bis-bibenzyls yielded detailed report on this compound class along with their application, mode of action, natural source, techniques of synthesis, extraction procedure, isolation and characterization. Further, the structure activity relationship studies and bioactivity of bibenzyls derived from non-bryophytic origin were also summarized. CONCLUSION This review encompasses prospective biological application of botanical reservoir of this primarily ignored, primeval land plant group where recent technical advances has paved the way for qualitative and quantitative isolation and estimation of novel compounds as well as marker components to study their impact on environment, as bio-control agents and as key leads in future drug designing. Graphical abstract.
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Affiliation(s)
- Samapika Nandy
- Research Scholar, Department of Life Sciences, Presidency University, Kolkata, 700073 India
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, Kolkata, 700073 India
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150
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Abstract
Significance: Oxidative stress in moderation positively affects homeostasis through signaling, while in excess it is associated with adverse health outcomes. Both activities are generally attributed to reactive oxygen species (ROS); hydrogen peroxide as the signal, and cysteines on regulatory proteins as the target. However, using antioxidants to affect signaling or benefit health has not consistently translated into expected outcomes, or when it does, the mechanism is often unclear. Recent Advances: Reactive sulfur species (RSS) were integral in the origin of life and throughout much of evolution. Sophisticated metabolic pathways that evolved to regulate RSS were easily "tweaked" to deal with ROS due to the remarkable similarities between the two. However, unlike ROS, RSS are stored, recycled, and chemically more versatile. Despite these observations, the relevance and regulatory functions of RSS in extant organisms are generally underappreciated. Critical Issues: A number of factors bias observations in favor of ROS over RSS. Research conducted in room air is hyperoxic to cells, and promotes ROS production and RSS oxidation. Metabolic rates of rodent models greatly exceed those of humans; does this favor ROS? Analytical methods designed to detect ROS also respond to RSS. Do these disguise the contributions of RSS? Future Directions: Resolving the ROS/RSS issue is vital to understand biology in general and human health in particular. Improvements in experimental design and analytical methods are crucial. Perhaps the most important is an appreciation of all the attributes of RSS and keeping an open mind.
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Affiliation(s)
- Kenneth R Olson
- Department of Physiology, Indiana University School of Medicine-South Bend, South Bend, Indiana, USA
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