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Wang S, Zeng T, Zhao S, Zhu Y, Feng C, Zhan J, Li S, Ho CT, Gosslau A. Multifunctional health-promoting effects of oolong tea and its products. FOOD SCIENCE AND HUMAN WELLNESS 2022. [DOI: 10.1016/j.fshw.2021.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Cao QQ, Fu YQ, Wang JQ, Zhang L, Wang F, Yin JF, Xu YQ. Sensory and chemical characteristics of Tieguanyin oolong tea after roasting. Food Chem X 2021; 12:100178. [PMID: 34927052 PMCID: PMC8651997 DOI: 10.1016/j.fochx.2021.100178] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/28/2021] [Accepted: 12/01/2021] [Indexed: 11/26/2022] Open
Abstract
Roasting, a critical process for oolong tea, has been applied to Tieguanyin tea to improve flavor attributes. To investigate the effects of the roasting on the flavor of Tieguanyin, the global metabolomics analysis on the non-volatile and volatile components were proceeded. The weakening of bitterness and astringency, caused by roasting, may be attributed to the decreasing of flavonoids glycosides and procyanidins, whereas the enhancing of sweet aftertaste to the increasing of gallic acid. Besides, l-theanine flavan-3-ols adducts (N-ehtyl-2-pyrrolidinone substituted flavan-3-ols) increased dramatically at 130 °C compared with 105 °C, with the reduction of l-theanine and flavan-3-ols. Meanwhile, high temperature hampered the volatiles' diversity and intensity, resulting from the lowering of floral volatiles, i.e., β-ionone, jasmine, and nerolidol, yet the nitrogen-containing heterocyclic compounds increased, e.g., pyrroles and pyrazines. The results can help to comprehensively understand the influences of roasting technology on the flavor and chemistry of oolong tea.
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Affiliation(s)
- Qing-Qing Cao
- Tea Research Institute Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, 9 South Meiling Road, Hangzhou 310008, China.,Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yan-Qing Fu
- Tea Research Institute Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, 9 South Meiling Road, Hangzhou 310008, China
| | - Jie-Qiong Wang
- Tea Research Institute Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, 9 South Meiling Road, Hangzhou 310008, China
| | - Liang Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
| | - Fang Wang
- Tea Research Institute Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, 9 South Meiling Road, Hangzhou 310008, China
| | - Jun-Feng Yin
- Tea Research Institute Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, 9 South Meiling Road, Hangzhou 310008, China
| | - Yong-Quan Xu
- Tea Research Institute Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, 9 South Meiling Road, Hangzhou 310008, China
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Role of Herbal Teas in Regulating Cellular Homeostasis and Autophagy and Their Implications in Regulating Overall Health. Nutrients 2021; 13:nu13072162. [PMID: 34201882 PMCID: PMC8308238 DOI: 10.3390/nu13072162] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 06/19/2021] [Accepted: 06/20/2021] [Indexed: 02/06/2023] Open
Abstract
Tea is one of the most popular and widely consumed beverages worldwide, and possesses numerous potential health benefits. Herbal teas are well-known to contain an abundance of polyphenol antioxidants and other ingredients, thereby implicating protection and treatment against various ailments, and maintaining overall health in humans, although their mechanisms of action have not yet been fully identified. Autophagy is a conserved mechanism present in organisms that maintains basal cellular homeostasis and is essential in mediating the pathogenesis of several diseases, including cancer, type II diabetes, obesity, and Alzheimer’s disease. The increasing prevalence of these diseases, which could be attributed to the imbalance in the level of autophagy, presents a considerable challenge in the healthcare industry. Natural medicine stands as an effective, safe, and economical alternative in balancing autophagy and maintaining homeostasis. Tea is a part of the diet for many people, and it could mediate autophagy as well. Here, we aim to provide an updated overview of popular herbal teas’ health-promoting and disease healing properties and in-depth information on their relation to autophagy and its related signaling molecules. The present review sheds more light on the significance of herbal teas in regulating autophagy, thereby improving overall health.
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Wang Q, Guan X, Lai C, Gao H, Zheng Y, Huang J, Lin B. Selenium enrichment improves anti-proliferative effect of oolong tea extract on human hepatoma HuH-7 cells. Food Chem Toxicol 2020; 147:111873. [PMID: 33248145 DOI: 10.1016/j.fct.2020.111873] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 10/14/2020] [Accepted: 11/17/2020] [Indexed: 10/22/2022]
Abstract
Selenium (Se)-enriched tea is attracting increasing interests due to its significantly improved health benefits. This study was to investigate the anti-proliferative effects of Se-enriched oolong tea against human hepatoma HuH-7 cells. Compared with regular oolong tea extract (TE, 0.04 μg selenium/g), Se-enriched oolong tea extract (Se-TE, 0.51 μg selenium/g) exhibited more prominent anti-proliferative effect against HuH-7 cells with an IC50 of 203.1 μg/mL, mainly due to the synergistic effects of organic selenium and tea polyphenols. Our results found that Se-TE increased intracellular ROS production, arrested the cell cycle at G2/M phase, and thus induced cell apoptosis. In addition, western blotting assay revealed the increased expressions of the p53, Bax, caspase 3, and a reduction of Bcl-2 and CDK2, resulting in Se-TE-induced apoptosis. The improved anti-proliferative effect makes Se-enriched oolong tea extract a promising health-promoting ingredient in food industry.
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Affiliation(s)
- Qi Wang
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, China; Fujian Key Laboratory of Agricultural Product (Food) Processing, Fuzhou, 350003, China
| | - Xuefang Guan
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, China; Fujian Key Laboratory of Agricultural Product (Food) Processing, Fuzhou, 350003, China
| | - Chengchun Lai
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, China; Fujian Key Laboratory of Agricultural Product (Food) Processing, Fuzhou, 350003, China
| | - Huiying Gao
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, China; Fujian Key Laboratory of Agricultural Product (Food) Processing, Fuzhou, 350003, China
| | - Yafeng Zheng
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Juqing Huang
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, China; Fujian Key Laboratory of Agricultural Product (Food) Processing, Fuzhou, 350003, China
| | - Bin Lin
- Institute of Agricultural Engineering, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, China; Fujian Key Laboratory of Agricultural Product (Food) Processing, Fuzhou, 350003, China.
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Duan P, Zhang J, Chen J, Liu Z, Guo P, Li X, Li L, Zhang Q. Oolong tea drinking boosts calcaneus bone mineral density in postmenopausal women: a population-based study in southern China. Arch Osteoporos 2020; 15:49. [PMID: 32189157 DOI: 10.1007/s11657-020-00723-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 02/28/2020] [Indexed: 02/05/2023]
Abstract
INTRODUCTION Observational studies have shown that tea consumption has a potentially beneficial effect on bone health. However, few studies have assessed the effects of types of tea consumed on bone health. We aimed to investigate whether drinking oolong tea is associated with increased calcaneus bone mineral density (BMD) in postmenopausal women. METHODS From an epidemiological survey in Shantou, 476 postmenopausal women aged 40 to 88 years were enrolled in the study. All women were questioned about their demographic features, lifestyle, health status, types of tea consumed, habit of tea consumption, and habitual dietary intake by use of a structured questionnaire. Estimated areal BMD was measured by calcaneal quantitative ultrasound (QUS). RESULTS As compared with non-tea drinkers, oolong tea drinkers had higher calcaneus BMD (β 34.70 [95% CI 10.38, 59.03]). In addition, calcaneus BMD was significantly increased for those drinking 1-5 cups/day (β 27.43 [95% CI 3.70, 51.16]) but not > 5 cups/day. We observed no linear increase in calcaneus BMD with increasing years of tea consumption and local polynomial regression fitting showed a parabola-shaped association between years of tea consumption and calcaneus BMD. However, symptoms of osteoporosis did not differ by types of tea consumed. CONCLUSION Long-term moderate oolong tea consumption may have beneficial effects on bone health in postmenopausal women in Shantou of southern China.
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Affiliation(s)
- Pengfei Duan
- Department of Preventive Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Jiahong Zhang
- Department of Preventive Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Jialian Chen
- Department of Preventive Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Zhixi Liu
- Department of Preventive Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Pi Guo
- Department of Preventive Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Xiaolian Li
- Department of Orthopedics, the First Affiliated Hospital of Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Linfen Li
- Institution of Drug Clinical Trial, the Second Affiliated Hospital of Shantou University Medical College, Shantou, 515041, Guangdong, China
| | - Qingying Zhang
- Department of Preventive Medicine, Shantou University Medical College, Shantou, 515041, Guangdong, China.
- Guangdong Provincial Key Laboratory for Breast Cancer Diagnosis and Treatment, Cancer Hospital of Shantou University Medical College, Shantou, 515041, China.
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