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Deng H, Liu J, Xiao Y, Wu JL, Jiao R. Possible Mechanisms of Dark Tea in Cancer Prevention and Management: A Comprehensive Review. Nutrients 2023; 15:3903. [PMID: 37764687 PMCID: PMC10534731 DOI: 10.3390/nu15183903] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/01/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023] Open
Abstract
Tea is one of the most popular drinks in the world. Dark tea is a kind of post-fermented tea with unique sensory characteristics that is produced by the special fermentation of microorganisms. It contains many bioactive substances, such as tea polyphenols, theabrownin, tea polysaccharides, etc., which have been reported to be beneficial to human health. This paper reviewed the latest research on dark tea's potential in preventing and managing cancer, and the mechanisms mainly involved anti-oxidation, anti-inflammation, inhibiting cancer cell proliferation, inducing cancer cell apoptosis, inhibiting tumor metastasis, and regulating intestinal flora. The purpose of this review is to accumulate evidence on the anti-cancer effects of dark tea, the corresponding mechanisms and limitations of dark tea for cancer prevention and management, the future prospects, and demanding questions about dark tea's possible contributions as an anti-cancer adjuvant.
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Affiliation(s)
- Huilin Deng
- Department of Food Science and Engineering, Institute of Science and Technology, Jinan University, 601 Huangpu Road, Guangzhou 510632, China; (H.D.); (J.L.)
| | - Jia Liu
- Department of Food Science and Engineering, Institute of Science and Technology, Jinan University, 601 Huangpu Road, Guangzhou 510632, China; (H.D.); (J.L.)
| | - Ying Xiao
- Faculty of Medicine, Macau University of Science and Technology, Macau, China;
| | - Jian-Lin Wu
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau, China;
| | - Rui Jiao
- Department of Food Science and Engineering, Institute of Science and Technology, Jinan University, 601 Huangpu Road, Guangzhou 510632, China; (H.D.); (J.L.)
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Deng X, Hou Y, Zhou H, Li Y, Xue Z, Xue X, Huang G, Huang K, He X, Xu W. Hypolipidemic, anti-inflammatory, and anti-atherosclerotic effects of tea before and after microbial fermentation. Food Sci Nutr 2021; 9:1160-1170. [PMID: 33598200 PMCID: PMC7866600 DOI: 10.1002/fsn3.2096] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/14/2020] [Accepted: 12/17/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Microbial fermentation significantly affects the flavor and efficacy of tea. It is generally believed that fermented tea is more effective in lowering lipids, while unfermented tea can more effectively inhibit inflammation. However, there is not sufficient evidence to support this claim. To systematically compare the hypolipidemic, anti-inflammatory, and anti-atherosclerotic effects of tea before and after microbial fermentation, hyperlipidemic rats and inflammatory injury cells were treated with Monascus purpureus-fermented pu-erh tea water extract (MPT) and sun-dried green tea water extract (SGT), respectively. RESULTS MPT, with higher levels of theabrownins, flavonoids, gallic acid (GA), and lovastatin, was more effective in reducing serum triglyceride (TG), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), and inflammatory cytokines (TNF-α, IL-1β, and IL-6), while SGT, with higher levels of tea polyphenols, amino acids, (-)-epigallocatechin gallate (EGCG), and theaflavins, was more effective in increasing serum high-density lipoprotein cholesterol (HDL-C) in hyperlipidemic rats. The foam cells on the arterial wall of the rats in the MPT group were visibly less, and the thrombosis time was longer than that in the SGT group. Cell experiments showed that MPT was more effective in protecting endothelial cells from damage than SGT. CONCLUSION Surprisingly, Monascus purpureus-fermented pu-erh tea not only had better hypolipidemic and anti-atherosclerotic effects than its raw material (sun-dried green tea), but also was superior in anti-inflammatory effects to the latter, which was possibly attributable to the great changes in functional ingredients during microbial fermentation.
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Affiliation(s)
- Xiujuan Deng
- College of Food Science and TechnologyYunnan Agricultural UniversityKunmingChina
| | - Yan Hou
- College of Long Run Pu‐erh TeaYunnan Agricultural UniversityKunmingChina
| | - Hongjie Zhou
- College of Long Run Pu‐erh TeaYunnan Agricultural UniversityKunmingChina
| | - Yali Li
- College of Long Run Pu‐erh TeaYunnan Agricultural UniversityKunmingChina
| | - Zhiqiang Xue
- College of Long Run Pu‐erh TeaYunnan Agricultural UniversityKunmingChina
| | - Xiaoting Xue
- College of Long Run Pu‐erh TeaYunnan Agricultural UniversityKunmingChina
| | - Ganghua Huang
- College of Long Run Pu‐erh TeaYunnan Agricultural UniversityKunmingChina
| | - Kunlun Huang
- Key Laboratory of Precision Nutrition and Food QualityDepartment of Nutrition and HealthChina Agricultural UniversityBeijingChina
| | - Xiaoyun He
- Key Laboratory of Precision Nutrition and Food QualityDepartment of Nutrition and HealthChina Agricultural UniversityBeijingChina
| | - Wentao Xu
- Key Laboratory of Precision Nutrition and Food QualityDepartment of Nutrition and HealthChina Agricultural UniversityBeijingChina
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Tu SH, Chen MY, Chen LC, Mao YT, Ho CH, Lee WJ, Lin YK, Pan MH, Lo CY, Chen CL, Yen Y, Whang-Peng J, Ho CT, Wu CH, Ho YS. Pu-erh Tea Extract Attenuates Nicotine-Induced Foam Cell Formation in Primary Cultured Monocytes: An in Vitro Mechanistic Study. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:3186-3195. [PMID: 27001463 DOI: 10.1021/acs.jafc.6b00624] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this study, the mechanisms by which pu-erh tea extract (PETE) attenuates nicotine-induced foam cell formation were investigated. Monocytes were purified from healthy individuals using commercial antibodies coated with magnetic beads. We found that the nicotine-induced (1-10 μM) expression of oxidized low-density lipoprotein receptors (ox-LDLRs) and α9-nAchRs in monocytes was significantly attenuated by 24 h of PETE (10 μg/mL; ∗, p < 0.05) cotreatment. Nicotine (1 μM for 24 h) significantly induced the expression of the surface adhesion molecule ICAM-1 and the monocyte integrin adhesion molecule (CD11b) by human umbilical vein endothelial cells (HUVECs) and triggered monocytes to differentiate into macrophages via interactions with the endothelium. After treatment with nicotine (0.1-10 μM for 24 h), the HUVECs released chemotactic factors (IL-8) to attract monocytes into the tunica intima of the artery, and the monocytes then transformed into foam cells. We demonstrated that PETE treatment (>1 μg/mL for 24 h; ∗, p < 0.05) significantly attenuates nicotine-induced (1 μM) monocyte migration toward HUVECs and foam cell formation. This study suggests that tea components effectively attenuate the initial step (foam cell formation) of nicotine-induced atherosclerosis in circulating monocytes.
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Affiliation(s)
- Shih-Hsin Tu
- Comprehensive Cancer Center, Taipei Medical University , Taipei, Taiwan
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University , Taipei, Taiwan
- Taipei Cancer Center, Taipei Medical University , Taipei, Taiwan
- Breast Medical Center, Taipei Medical University Hospital , Taipei, Taiwan
| | - Ming-Yao Chen
- Division of Gastroenterology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University , Taipei, Taiwan
| | - Li-Ching Chen
- Division of Gastroenterology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University , Taipei, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University , Taipei, Taiwan
| | - Yi-Ting Mao
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University , Taipei, Taiwan
| | - Chi-Hou Ho
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University , Taipei, Taiwan
| | - Wen-Jui Lee
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University , Taipei, Taiwan
| | - Yen-Kuang Lin
- Biostatistics Center, Taipei Medical University , Taipei, Taiwan
| | - Min-Hsiung Pan
- Institute of Food Sciences and Technology, National Taiwan University , Taipei, Taiwan
| | - Chih-Yu Lo
- Department of Food Science, National Chiayi University , Chiayi City, Taiwan
| | - Chi-Long Chen
- Department of Pathology, Taipei Medical University Hospital , Taipei, Taiwan
- Department of Pathology, College of Medicine, Taipei Medical University , Taipei, Taiwan
| | - Yun Yen
- Comprehensive Cancer Center, Taipei Medical University , Taipei, Taiwan
- Taipei Cancer Center, Taipei Medical University , Taipei, Taiwan
| | - Jacqueline Whang-Peng
- Comprehensive Cancer Center, Taipei Medical University , Taipei, Taiwan
- Taipei Cancer Center, Taipei Medical University , Taipei, Taiwan
| | - Chi-Tang Ho
- Department of Food Science, Rutgers University , New Brunswick, New Jersey 08901, United States
| | - Chih-Hsiung Wu
- Comprehensive Cancer Center, Taipei Medical University , Taipei, Taiwan
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University , Taipei, Taiwan
- Department of Surgery, En Chu Kong Hospital , New Taipei City 237, Taiwan
| | - Yuan-Soon Ho
- Comprehensive Cancer Center, Taipei Medical University , Taipei, Taiwan
- School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University , Taipei, Taiwan
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University , Taipei, Taiwan
- Department of Laboratory Medicine, Taipei Medical University Hospital, Taipei, Taiwan
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