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Karunaratne UW, Dassanayake TL. Effect of L-theanine on selective attention in a traffic-related reaction task in sleep-deprived young adults: a double-blind placebo-controlled, crossover study. Nutr Neurosci 2024:1-10. [PMID: 39052627 DOI: 10.1080/1028415x.2024.2383080] [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: 07/27/2024]
Abstract
BACKGROUND L-theanine is a non-protein-forming amino acid found in tea. Limited evidence suggests that it improves selective attention. Sleep deprivation impairs attention and psychomotor reactions, affecting automobile driving. We aimed to determine whether L-theanine improves neurobehavioral measures of visual attention in acutely sleep-deprived healthy adults in a traffic-scene-based attention task. METHODS In a double-blind, placebo-controlled, counterbalanced, two-way crossover study, we compared the effects of a 200-mg dose of L-theanine with a placebo (150 ml of distilled water) on a computerised, traffic-scene-based visual recognition reaction task in 24 healthy volunteers (age 20-25 years; 13 males) sleep-deprived overnight. The participants made speeded button-presses to imminent accident scenes (i.e. hits), while ignoring safe scenes. They were tested pre-dose and 45 min post-dose, each treatment administered one week apart. RESULTS Hit rates were more than 90% in all sessions, and were similar in two treatments, pre- vs post-dose. L-theanine significantly reduced false alarms (i.e. responses to safe scenes) (p = 0.014) and increased A' (i.e. target-distractor discriminability) (p = 0.009), whereas placebo did not (p > 0.05). L-theanine reduced hit reaction time by 38.65 ms (p = 0.007), and placebo by 19.08 ms (p = 0.016), however reaction time changes from baseline were not significantly different between treatments (p > 0.05). CONCLUSIONS L-theanine in high doses appears to improve selective visual attention by concurrently improving information processing speed and target-distractor discriminability in acutely sleep-deprived individuals. This is consistent with previous functional neuroimaging findings, where L-theanine suppressed distractor-processing and default-mode-network activity in visual selective attention tasks.
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Affiliation(s)
- Umangi W Karunaratne
- Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
| | - Tharaka L Dassanayake
- Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
- School of Psychological Sciences, The University of Newcastle, Callaghan, Australia
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Nadam IS, Bellamine A, Salom R, Guilera S, Inarejos-Garcia AM, Pillar G. Effects of the active botanical blend "WKUP GT" on attention and cognitive functions after lunch in healthy volunteers. Hum Psychopharmacol 2024; 39:e2895. [PMID: 38367243 DOI: 10.1002/hup.2895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/19/2024]
Abstract
OBJECTIVES "WKUP GT", a low caffeine beverage consisting of carob, Guarana, Green Tea and Elderberry extracts was studied on attention and cognitive functions post-lunch in a pilot randomized double blind placebo controlled trial. METHODS Thirty healthy volunteers were included in a crossover design trial, presenting five beverages randomly assigned to the following groups: placebo, "WKUP GT" (single, double or triple doses), or "caffeine" as an active control. Hemodynamic measurements were assessed as safety outcomes. The Cambridge Neuropsychological Test Automated Battery (CANTAB), was used to evaluate the patients when beverages were consumed 30 and 120 min after lunch (respectively Delta30 and Delta120 considering baseline). RESULTS Drinking "caffeine" or "WKUP GT" after lunch, showed significant improvement (p < 0.05) in rapid visual information processing compared to placebo (Delta120 of "caffeine", "WKUP" single and double). In addition, improvement in Multitasking Test (Delta30 for "WKUP" double, and Delta120 for "caffeine" and "WKUP" triple compared to placebo) was observed. "WKUP" triple also showed significant improvement for "memory" when compared to placebo (Delta120). Compared to "caffeine", WKUP GT did not increase systolic blood pressure. CONCLUSION "WKUP GT" showed improvements for attention, memory, psychomotor and executive function tasks after lunch without increase in pulse rate.
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Affiliation(s)
| | | | - Rafael Salom
- Department of Functional Extracts, ADM® Valencia, Valencia, Spain
| | - Sonia Guilera
- Department of Functional Extracts, ADM® Valencia, Valencia, Spain
| | | | - Giora Pillar
- Carmel Medical Center and Technion Faculty of Medicine, Haifa, Israel
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Suryawanshi MV, Gujarathi PP, Mulla T, Bagban I. Hypericum perforatum: a comprehensive review on pharmacognosy, preclinical studies, putative molecular mechanism, and clinical studies in neurodegenerative diseases. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:3803-3818. [PMID: 38175276 DOI: 10.1007/s00210-023-02915-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/20/2023] [Indexed: 01/05/2024]
Abstract
The herb Hypericum perforatum, also referred to as St. John's wort, has drawn a lot of interest because of its potential therapeutic benefits in treating neurodegenerative illnesses. Due to the absence of effective therapies, illnesses like Alzheimer's and Parkinson's disease pose an increasing worldwide health concern. Because of its wide variety of phytochemicals, especially hyperforin, and hypericin, Hypericum perforatum is well known for its neuroprotective properties. These substances have proven to be able to affect different cellular processes linked to neurodegeneration. They can act as anti-inflammatory, antioxidant, and neurotransmitter system regulators, which may help halt neurodegenerative illnesses' progression. The use of Hypericum perforatum extracts and its contents has shown encouraging results in research on animal models of neurodegenerative disorders. These advantages include higher nerve cell survival, lowered oxidative stress, and higher cognitive performance. Underscoring its versatile potential to combat neurodegeneration, Hypericum perforatum has neuroprotective mechanisms that modulate neuroinflammation and prevent apoptotic pathways. In conclusion, Hypericum perforatum shows tremendous promise as a potential treatment for neurological illnesses due to its wide variety of phytochemicals. To completely comprehend its specific mechanisms of action and turn these discoveries into efficient clinical therapies, additional research is needed. Investigating Hypericum perforatum's function in neurodegenerative disorders may present new opportunities for the advancement of ground-breaking therapeutic strategies.
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Affiliation(s)
- Meghraj Vivekanand Suryawanshi
- School of Pharmaceutical Sciences, Jaipur National University, Jaipur, Rajasthan, 302017, India
- Department of Pharmaceutics and Pharmaceutical Technology, Krishna School of Pharmacy and Research, Drs. Kiran and Pallavi Patel Global University, Varnama, Vadodara, Gujarat, 391240, India
- AllWell Neuritech LLP, Dharngaon, Maharashtra, 425105, India
| | - Pranjal P Gujarathi
- Department of Pharmacology, Vidhyadeep Institute of Pharmacy, Vidhyadeep University, Anita, Kim, Surat, Gujarat, 394110, India.
- Centre for Advance Research, Bhagwan Mahavir College of Pharmacy, Bhagwan Mahavir University, Vesu, Surat, Gujarat, 395007, India.
| | - Taufik Mulla
- Department of Pharmaceutics and Pharmaceutical Technology, Krishna School of Pharmacy and Research, Drs. Kiran and Pallavi Patel Global University, Varnama, Vadodara, Gujarat, 391240, India
| | - Imtiyaz Bagban
- Department of Pharmacology, Krishna School of Pharmacy and Research, Drs. Kiran and Pallavi Patel Global University, Varnama, Vadodara, Gujarat, 391240, India
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Zhao Y, Ding ZG, Yan YJ, Yang R, Qi MM, Pan SK, Xie JL, Sun YH, Xiang J. Teadenol B as a Component of Microorganism-Fermented Tea Extract Inhibited Breast Cancers by Promoting Autophagy. Molecules 2024; 29:872. [PMID: 38398624 PMCID: PMC10892666 DOI: 10.3390/molecules29040872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/09/2024] [Accepted: 02/12/2024] [Indexed: 02/25/2024] Open
Abstract
Breast cancer is a significant threat to life and health, which needs more safe and effective drugs to be explored. Teadenol B is a characteristic chemical component of microbial fermented tea. This study discovered that teadenol B could exhibit obvious inhibitory effects on all four different clinical subtype characteristics of breast cancer cells. Proteomic studies show that deoxycytidine triphosphate deaminase (DCTD), which could block DNA synthesis and repair DNA damage, had the most significant and consistent reduction in all four types of breast cancer cells with the treatment of teadenol B. Considering MDA-MB-231 cells exhibit poor clinical prognosis and displayed substantial statistical differences in KEGG pathway enrichment analysis results, we investigated its impact on the size and growth of MDA-MB-231 triple-negative breast tumors transplanted into nude mice and demonstrated that teadenol B significantly suppressed tumor growth without affecting body weight significantly. Finally, we found that the conversion of LC3-I to LC3-II in MDA-MB-231 increased significantly with teadenol B treatment. This proved that teadenol B could be a strong autophagy promotor, which explained the down-regulation of DCTD to some extent and may be the potential mechanism underlying teadenol B's anti-breast cancer effects. This finding provides new evidence for drinking fermented tea to prevent breast cancer and highlights the potential of teadenol B as a novel therapeutic option for breast cancer prevention and treatment, necessitating further investigations to clarify its exact target and the details involved.
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Affiliation(s)
- Ying Zhao
- Ministry of Education Laboratory of Combinatorial Biosynthesis and Drug Discovery, School of Pharmaceutical Science, Wuhan University, Wuhan 430071, China; (Y.Z.); (Y.-J.Y.); (M.-M.Q.); (Y.-H.S.)
| | - Zhang-Gui Ding
- Pu-erh Tea Fermentation Engineering Research Center of Yunnan Province, Kunming 650271, China; (Z.-G.D.); (R.Y.); (S.-K.P.); (J.-L.X.)
- Key Laboratory of Pu-erh Tea Processing Technology, Ministry of Agriculture and Rural Affairs, Kunming 650271, China
- Yunnan Dayi Microbial Technology Co., Ltd., Kunming 650271, China
- Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, Yunnan University, Kunming 650091, China
| | - Yu-Jie Yan
- Ministry of Education Laboratory of Combinatorial Biosynthesis and Drug Discovery, School of Pharmaceutical Science, Wuhan University, Wuhan 430071, China; (Y.Z.); (Y.-J.Y.); (M.-M.Q.); (Y.-H.S.)
| | - Rui Yang
- Pu-erh Tea Fermentation Engineering Research Center of Yunnan Province, Kunming 650271, China; (Z.-G.D.); (R.Y.); (S.-K.P.); (J.-L.X.)
- Key Laboratory of Pu-erh Tea Processing Technology, Ministry of Agriculture and Rural Affairs, Kunming 650271, China
- Yunnan Dayi Microbial Technology Co., Ltd., Kunming 650271, China
| | - Miao-Miao Qi
- Ministry of Education Laboratory of Combinatorial Biosynthesis and Drug Discovery, School of Pharmaceutical Science, Wuhan University, Wuhan 430071, China; (Y.Z.); (Y.-J.Y.); (M.-M.Q.); (Y.-H.S.)
| | - Shu-Kang Pan
- Pu-erh Tea Fermentation Engineering Research Center of Yunnan Province, Kunming 650271, China; (Z.-G.D.); (R.Y.); (S.-K.P.); (J.-L.X.)
- Key Laboratory of Pu-erh Tea Processing Technology, Ministry of Agriculture and Rural Affairs, Kunming 650271, China
- Yunnan Dayi Microbial Technology Co., Ltd., Kunming 650271, China
| | - Ji-Ling Xie
- Pu-erh Tea Fermentation Engineering Research Center of Yunnan Province, Kunming 650271, China; (Z.-G.D.); (R.Y.); (S.-K.P.); (J.-L.X.)
- Key Laboratory of Pu-erh Tea Processing Technology, Ministry of Agriculture and Rural Affairs, Kunming 650271, China
- Yunnan Dayi Microbial Technology Co., Ltd., Kunming 650271, China
| | - Yu-Hui Sun
- Ministry of Education Laboratory of Combinatorial Biosynthesis and Drug Discovery, School of Pharmaceutical Science, Wuhan University, Wuhan 430071, China; (Y.Z.); (Y.-J.Y.); (M.-M.Q.); (Y.-H.S.)
| | - Jin Xiang
- Ministry of Education Laboratory of Combinatorial Biosynthesis and Drug Discovery, School of Pharmaceutical Science, Wuhan University, Wuhan 430071, China; (Y.Z.); (Y.-J.Y.); (M.-M.Q.); (Y.-H.S.)
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Wu SH, Chen YC, Chen CH, Liu HS, Liu ZX, Chiu CH. Caffeine supplementation improves the cognitive abilities and shooting performance of elite e-sports players: a crossover trial. Sci Rep 2024; 14:2074. [PMID: 38267565 PMCID: PMC10808346 DOI: 10.1038/s41598-024-52599-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 01/21/2024] [Indexed: 01/26/2024] Open
Abstract
We explored the effect of 3 mg/kg of caffeine supplementation on the cognitive ability and shooting performance of elite e-sports players. Nine e-sports players who had received professional training in e-sports and had won at least eighth place in national-level e-sports shooting competitions. After performing three to five familiarization tests, we employed a single blind, randomized crossover design to divide participants into caffeine trial (CAF) and placebo trial (PL). The CAF trial took capsules with 3 mg/kg of caffeine, whereas the PL trial took a placebo capsule. After a one-hour rest, the Stroop task, the visual search ability test, and the shooting ability test were conducted. The CAF trial's performance in the Stroop task in terms of congruent condition (P = 0.023) and visual search reaction time with 20 items (P = 0.004) was significantly superior to those of the PL trial. In the shooting test, the CAF trial's kill ratio (P = 0.020) and hit accuracy (P = 0.008) were significantly higher, and the average time to target (P = 0.001) was significantly shorter than those of the PL trial. Caffeine supplementation significantly improves e-sports players' reaction times and shooting performance.
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Affiliation(s)
- Shih-Hao Wu
- School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan
- Department of Emergency Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Yu-Chun Chen
- Department of Physical Education, National Taiwan University of Sport, Taichung, 404, Taiwan
| | - Che-Hsiu Chen
- Department of Sport Performance, National Taiwan University of Sport, Taichung, Taiwan
| | - Hou-Shao Liu
- Graduate Program in Department of Exercise Health Science, National Taiwan University of Sport, No.16, Sec. 1, Shuang-Shih Rd., Taichung, 404, Taiwan
- Institute of Sports Sciences, University of Taipei, Taipei, Taiwan
| | - Zhi-Xin Liu
- Graduate Program in Department of Exercise Health Science, National Taiwan University of Sport, No.16, Sec. 1, Shuang-Shih Rd., Taichung, 404, Taiwan
| | - Chih-Hui Chiu
- Graduate Program in Department of Exercise Health Science, National Taiwan University of Sport, No.16, Sec. 1, Shuang-Shih Rd., Taichung, 404, Taiwan.
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Tian Y, Fan L, Xue H, Zhao X, Zheng J, Sun W, Yao M, Du W. Associations between tea-drinking habits and health-related quality of life in Chinese adults: a mediation analysis based on sleep quality. Int Health 2023:ihad110. [PMID: 38108796 DOI: 10.1093/inthealth/ihad110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/01/2023] [Accepted: 11/15/2023] [Indexed: 12/19/2023] Open
Abstract
BACKGROUND The aim of this study was to explore the association between tea-drinking habits and health-related quality of life (HRQoL) in Chinese adults and the mediating effect of sleep quality in this association. METHODS Data were derived from the 2020 Survey of Social Factors for Chronic Disease Prevention and Control among adults in Lishui District, Nanjing, Jiangsu Province, China. Tea-drinking habits were measured by participants' self-report. The HRQoL was measured using the 12-item Short Form Health Survey. Multiple linear regression modelling and mediating effects modelling were used for analyses. RESULTS Habitual tea drinking, frequent tea drinking (drinking tea 6-7 days per week), tea concentration and <10 g of tea per day were strongly associated with an increase in HRQoL among Chinese adults (all p<0.05). The association between tea-drinking habits and HRQoL among Chinese adults was more pronounced in the male population and in those ≥45 y of age (all p<0.05). Tea drinking habits may improve HRQoL in Chinese adults by enhancing sleep quality (all p<0.05). CONCLUSIONS Maintaining the habit of habitual tea drinking (6-7 days per week), in small amounts (<10 g tea per day) was conducive to improving HRQoL of Chinese adults by improving sleep quality.
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Affiliation(s)
- Yong Tian
- School of Public Health, Southeast University, No. 87, Dingjiaqiao, Gulou District, Nanjing 210009, Jiangsu Province, China
| | - Lijun Fan
- School of Public Health, Southeast University, No. 87, Dingjiaqiao, Gulou District, Nanjing 210009, Jiangsu Province, China
| | - Hui Xue
- School of Public Health, Southeast University, No. 87, Dingjiaqiao, Gulou District, Nanjing 210009, Jiangsu Province, China
| | - Xinyu Zhao
- School of Public Health, Southeast University, No. 87, Dingjiaqiao, Gulou District, Nanjing 210009, Jiangsu Province, China
| | - Ji Zheng
- Lishui District Health Committee, No. 203 Wenchang Road, Lishui District, Nanjing, Jiangsu Province, China
| | - Wancai Sun
- Lishui District Health Committee, No. 203 Wenchang Road, Lishui District, Nanjing, Jiangsu Province, China
| | - Ming Yao
- Lishui District Health Committee, No. 203 Wenchang Road, Lishui District, Nanjing, Jiangsu Province, China
| | - Wei Du
- School of Public Health, Southeast University, No. 87, Dingjiaqiao, Gulou District, Nanjing 210009, Jiangsu Province, China
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Kamli H, Shaikh A, Bappi MH, Raposo A, Ahmad MF, Sonia FA, Akbor MS, Prottay AAS, Gonçalves SA, Araújo IM, Coutinho HDM, Elbendary EY, Lho LH, Han H, Islam MT. Sclareol exerts synergistic antidepressant effects with quercetin and caffeine, possibly suppressing GABAergic transmission in chicks. Biomed Pharmacother 2023; 168:115768. [PMID: 37866001 DOI: 10.1016/j.biopha.2023.115768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/17/2023] [Accepted: 10/17/2023] [Indexed: 10/24/2023] Open
Abstract
This study evaluated the effects of sclareol (SCL) with or without caffeine (CAF) and quercetin (QUR) using in-vivo and in-silico studies. For this, 5-day-old chicks weighing between 45 and 48 g were randomly divided into five groups and treated accordingly. The chicks were monitored to compare the occurrence, latency, and duration of sleep as well as the loss and gain of righting reflex in response to SCL-10 mg/kg, CAF-10 mg/kg, and QUR-50 mg/kg using a thiopental sodium (TS)-induced sleeping model. Data were analyzed by one-way ANOVA followed by t-Student-Newman-Keuls' as a posthoc test at 95% confidence intervals with multiple comparisons. An in-silico study was also performed to investigate the possible antidepressant mechanisms of the test and/or standard drugs with different subunits of GABAA receptors. In comparison to the SCL, CAF, and QUR individual groups, SCL+CAF+QUR significantly increased the latency while decreasing the length of sleep. The incidence of loss and gain of the righting reflex was also modulated in the combination group. SCL showed better interaction with GABAA (α2 and α5) subunits than QUR with α2, α3, and α5. All these compounds showed stronger interactions with the GABAA receptor subunits than the standard CAF. Taken together, SCL, CAF, and QUR reduced the TS-induced righting reflex and sleeping time in the combination group more than in the individual treatments. SCL may show its antidepressant effects, possibly through interactions with GABAA receptor subunits.
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Affiliation(s)
- Hossam Kamli
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia
| | - Ahmad Shaikh
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia
| | - Mehedi Hasan Bappi
- Department of Pharmacy, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh
| | - António Raposo
- CBIOS (Research Center for Biosciences and Health Technologies), Universidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024 Lisboa, Portugal
| | - Md Faruque Ahmad
- Department of Clinical Nutrition, College of Applied Medical Sciences, Jazan University, Jazan 45142, Saudi Arabia
| | - Fatema Akter Sonia
- Department of Pharmacy, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh
| | - Md Showkoth Akbor
- Department of Pharmacy, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh
| | - Abdullah Al Shamsh Prottay
- Department of Pharmacy, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh
| | - Sheila Alves Gonçalves
- Department of Biological Chemistry, Laboratory of Microbiology and Molecular Biology, Program of Post-Graduation in Molecular Bioprospection, Regional University of Cariri, Crato, CE 63105-000, Brazil
| | - Isaac Moura Araújo
- Department of Biological Chemistry, Laboratory of Microbiology and Molecular Biology, Program of Post-Graduation in Molecular Bioprospection, Regional University of Cariri, Crato, CE 63105-000, Brazil
| | - Henrique Douglas Melo Coutinho
- Department of Biological Chemistry, Laboratory of Microbiology and Molecular Biology, Program of Post-Graduation in Molecular Bioprospection, Regional University of Cariri, Crato, CE 63105-000, Brazil
| | - Ehab Y Elbendary
- Department of Clinical Nutrition, College of Applied Medical Sciences, Jazan University, Jazan 45142, Saudi Arabia
| | - Linda Heejung Lho
- College of Business Division of Tourism and Hotel Management, Cheongju University, 298 Daesung-ro, Cheongwon-gu, Cheongju-si, Chungcheongbuk-do 28503, Republic of Korea.
| | - Heesup Han
- College of Hospitality and Tourism Management, Sejong University, 98 Gunja-Dong, Gwanjin-Gu, Seoul 143-747, Republic of Korea.
| | - Muhammad Torequl Islam
- Department of Pharmacy, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj 8100, Bangladesh.
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Jagim AR, Harty PS, Tinsley GM, Kerksick CM, Gonzalez AM, Kreider RB, Arent SM, Jager R, Smith-Ryan AE, Stout JR, Campbell BI, VanDusseldorp T, Antonio J. International society of sports nutrition position stand: energy drinks and energy shots. J Int Soc Sports Nutr 2023; 20:2171314. [PMID: 36862943 PMCID: PMC9987737 DOI: 10.1080/15502783.2023.2171314] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 01/18/2023] [Indexed: 03/04/2023] Open
Abstract
Position Statement: The International Society of Sports Nutrition (ISSN) bases the following position stand on a critical analysis of the literature regarding the effects of energy drink (ED) or energy shot (ES) consumption on acute exercise performance, metabolism, and cognition, along with synergistic exercise-related performance outcomes and training adaptations. The following 13 points constitute the consensus of the Society and have been approved by the Research Committee of the Society: Energy drinks (ED) commonly contain caffeine, taurine, ginseng, guarana, carnitine, choline, B vitamins (vitamins B1, B2, B3, B5, B6, B9, and B12), vitamin C, vitamin A (beta carotene), vitamin D, electrolytes (sodium, potassium, magnesium, and calcium), sugars (nutritive and non-nutritive sweeteners), tyrosine, and L-theanine, with prevalence for each ingredient ranging from 1.3 to 100%. Energy drinks can enhance acute aerobic exercise performance, largely influenced by the amount of caffeine (> 200 mg or >3 mg∙kg bodyweight [BW-1]) in the beverage. Although ED and ES contain several nutrients that are purported to affect mental and/or physical performance, the primary ergogenic nutrients in most ED and ES based on scientific evidence appear to be caffeine and/or the carbohydrate provision. The ergogenic value of caffeine on mental and physical performance has been well-established, but the potential additive benefits of other nutrients contained in ED and ES remains to be determined. Consuming ED and ES 10-60 minutes before exercise can improve mental focus, alertness, anaerobic performance, and/or endurance performance with doses >3 mg∙kg BW-1. Consuming ED and ES containing at least 3 mg∙kg BW-1 caffeine is most likely to benefit maximal lower-body power production. Consuming ED and ES can improve endurance, repeat sprint performance, and sport-specific tasks in the context of team sports. Many ED and ES contain numerous ingredients that either have not been studied or evaluated in combination with other nutrients contained in the ED or ES. For this reason, these products need to be studied to demonstrate efficacy of single- and multi-nutrient formulations for physical and cognitive performance as well as for safety. Limited evidence is available to suggest that consumption of low-calorie ED and ES during training and/or weight loss trials may provide ergogenic benefit and/or promote additional weight control, potentially through enhanced training capacity. However, ingestion of higher calorie ED may promote weight gain if the energy intake from consumption of ED is not carefully considered as part of the total daily energy intake. Individuals should consider the impact of regular coingestion of high glycemic index carbohydrates from ED and ES on metabolic health, blood glucose, and insulin levels. Adolescents (aged 12 through 18) should exercise caution and seek parental guidance when considering the consumption of ED and ES, particularly in excessive amounts (e.g. > 400 mg), as limited evidence is available regarding the safety of these products among this population. Additionally, ED and ES are not recommended for children (aged 2-12), those who are pregnant, trying to become pregnant, or breastfeeding and those who are sensitive to caffeine. Diabetics and individuals with preexisting cardiovascular, metabolic, hepatorenal, and/or neurologic disease who are taking medications that may be affected by high glycemic load foods, caffeine, and/or other stimulants should exercise caution and consult with their physician prior to consuming ED. The decision to consume ED or ES should be based upon the beverage's content of carbohydrate, caffeine, and other nutrients and a thorough understanding of the potential side effects. Indiscriminate use of ED or ES, especially if multiple servings per day are consumed or when consumed with other caffeinated beverages and/or foods, may lead to adverse effects. The purpose of this review is to provide an update to the position stand of the International Society of Sports Nutrition (ISSN) integrating current literature on ED and ES in exercise, sport, and medicine. The effects of consuming these beverages on acute exercise performance, metabolism, markers of clinical health, and cognition are addressed, as well as more chronic effects when evaluating ED/ES use with exercise-related training adaptions.
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Affiliation(s)
- Andrew R. Jagim
- Sports Medicine, Mayo Clinic Health System, La Crosse, WI, USA
- Exercise & Sport Science, University of Wisconsin – La Crosse, La Crosse, WI, USA
| | - Patrick S. Harty
- Exercise & Performance Nutrition Laboratory, Lindenwood University, St. Charles, MO, USA
| | - Grant M. Tinsley
- Energy Balance and Body Composition Laboratory, Department of Kinesiology & Sport Management, Texas Tech University, Lubbock, TX, USA
| | - Chad M. Kerksick
- Sports Medicine, Mayo Clinic Health System, La Crosse, WI, USA
- Exercise & Performance Nutrition Laboratory, Lindenwood University, St. Charles, MO, USA
| | - Adam M. Gonzalez
- Department of Allied Health and Kinesiology, Hofstra University, Hempstead, NY, USA
| | - Richard B. Kreider
- Exercise & Sport Nutrition Lab, Department of Kinesiology and Sport Management, Texas A&M University, College Station, TX, USA
| | - Shawn M Arent
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | | | - Abbie E. Smith-Ryan
- Applied Physiology Laboratory, Department of Exercise & Sport Science, University of North Carolina, Chapel Hill, NC, USA
| | - Jeffrey R. Stout
- School of Kinesiology and Rehabilitation Science, University of Central Florida, Orlando, FL, USA
| | - Bill I. Campbell
- Performance & Physique Enhancement Laboratory, University of South Florida, Tampa, FL, USA
| | - Trisha VanDusseldorp
- Bonafede Health, LLC, JDS Therapeutics, Harrison, NY, USA
- Department of Health and Exercise Sciences, Jacksonville University, Jacksonville, FL, USA
| | - Jose Antonio
- Department of Health and Human Performance, Nova Southeastern University, Davie, FL, USA
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Yilmaz U, Buzdagli Y, Polat ML, Bakir Y, Ozhanci B, Alkazan S, Ucar H. Effect of single or combined caffeine and L-Theanine supplementation on shooting and cognitive performance in elite curling athletes: a double-blind, placebo-controlled study. J Int Soc Sports Nutr 2023; 20:2267536. [PMID: 37815006 PMCID: PMC10566444 DOI: 10.1080/15502783.2023.2267536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 10/03/2023] [Indexed: 10/11/2023] Open
Abstract
PURPOSE Previous studies have investigated the effect of single or combined caffeine (CAF) and L-theanine (THE) intake on attention performance. However, its effect on shooting performance and cognitive performance in a sport is unknown. The aim of this study was to investigate the hypothesis "Does single or combined CAF and THE supplementation have an effect on shooting and cognitive performance in elite curling athletes?." It is predicted that over the next decade, studies based on nutritional ergogenic supplements in the developing sport of curling will continue to increase, leading to a significant increase in studies examining the effects of CAF and THE supplementation, alone or in combination, on throwing and cognitive performance in elite curling athletes. METHODS In this double-blind, randomized controlled crossover study, twenty-two elite national curling athletes (age 20.20 ± 1.61 and sports age 6.20 ± 0.51 years, height 174.10 ± 7.21 cm, BMI 21.80 ± 3.47 kg/m2) were randomly assigned to CAF (6 mg/kg single dose CAF), THE (6 mg/kg single dose THE), CAF*THE (6 mg/kg CAF and 6 mg/kg THE combined) and PLA (400 mg maltodextrin) groups at each of four sessions. 60 minutes after taking the supplement, the athletes were first given the Stroop test and then asked to shoot. RESULTS Our main findings have shown that the performance of athletes in guard (F=3.452, P < .001, ηp2 = .842), draw (F=1.647, P < .001, ηp2 = .485), and take-out (F=3.121, P < .001, ηp2 = .743) shot styles significantly improved when comparing the combined intake of CAF and THE to the PLA. Regarding cognitive performance evaluation through the Stroop test, during the NR task (F=4.743, P = .001, ηp2 = .653), the combined intake of CAF and THE significantly improved reaction times compared to the intake of single CAF, THE, or PLA. The best reaction times during the CR and ICR (respectively; F=2.742, P = .004, ηp2 = .328; F = 1.632, P < .001, ηp2 = .625) tasks were achieved with the combined CAF and THE intake, showing a significant improvement compared to PLA. During the NER (F=2.961, P < .001, ηp2 = .741), task, the combined intake of CAF and THE significantly improved error rates compared to the intake of CAF, THE, or PLA single. The best accuracy rates during the CER and ICER (respectively; F=4.127, P < .001, ηp2 = .396; F=3.899, P < .001, ηp2 = .710) tasks were achieved with the combined CAF and THE intake, leading to a significant reduction in error rates compared to PLA. Based on these findings, it has been demonstrated in this study that the best shooting scores and cognitive performance were achieved, particularly with the combined intake of CAF and THE. CONCLUSIONS Based on these findings, it has been demonstrated in this study that the best shooting scores and cognitive performance were achieved, particularly with the combined intake of CAF and THE. The combined use of these supplements has been found to be more effective on shooting and cognitive performance than their single use.
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Affiliation(s)
- Umut Yilmaz
- Hakkâri University, Department of Physical Education and Sports, Faculty of Education, Hakkâri, Turkey
| | - Yusuf Buzdagli
- Erzurum Technical University, Department of Coaching Education, Faculty of Sport Sciences, Erzurum, Turkey
| | | | - Yusuf Bakir
- Erzurum Technical University, Institute of Health Sciences, Erzurum, Turkey
| | - Burak Ozhanci
- Erzurum Technical University, Institute of Health Sciences, Erzurum, Turkey
| | - Sena Alkazan
- Erzurum Technical University, Institute of Health Sciences, Erzurum, Turkey
| | - Halil Ucar
- Atatürk University, Institute of Winter Sports and Sport Sciences, Erzurum, Turkey
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10
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Kumar S, Roy V. Repurposing Drugs: An Empowering Approach to Drug Discovery and Development. Drug Res (Stuttg) 2023; 73:481-490. [PMID: 37478892 DOI: 10.1055/a-2095-0826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2023]
Abstract
Drug discovery and development is a time-consuming and costly procedure that necessitates a substantial effort. Drug repurposing has been suggested as a method for developing medicines that takes less time than developing brand new medications and will be less expensive. Also known as drug repositioning or re-profiling, this strategy has been in use from the time of serendipitous drug discoveries to the modern computer aided drug designing and use of computational chemistry. In the light of the COVID-19 pandemic too, drug repurposing emerged as a ray of hope in the dearth of available medicines. Data availability by electronic recording, libraries, and improvements in computational techniques offer a vital substrate for systemic evaluation of repurposing candidates. In the not-too-distant future, it could be possible to create a global research archive for us to access, thus accelerating the process of drug development and repurposing. This review aims to present the evolution, benefits and drawbacks including current approaches, key players and the legal and regulatory hurdles in the field of drug repurposing. The vast quantities of available data secured in multiple drug databases, assisting in drug repurposing is also discussed.
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Affiliation(s)
- Sahil Kumar
- Pharmacology, ESIC Dental College and Hospital, New Delhi, India
| | - Vandana Roy
- Pharmacology, Maulana Azad Medical College, New Delhi, India
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11
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Dassanayake TL, Wijesundara D, Kahathuduwa CN, Weerasinghe VS. Dose-response effect of L-theanine on psychomotor speed, sustained attention, and inhibitory control: a double-blind, placebo-controlled, crossover study. Nutr Neurosci 2023; 26:1138-1146. [PMID: 36263942 DOI: 10.1080/1028415x.2022.2136884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
BACKGROUND L-theanine is a non-protein-forming amino acid found in tea. Previous research shows high doses (100-400 mg) of L-theanine enhances attention, mainly by reducing mind wandering and distracter processing. We hypothesized that these indirect mechanisms could significantly improve the performance of low-level attentional tasks, whereas the relative contribution could be less in complex attentional tasks that require active, higher-order processing of target stimuli. METHODS To test this hypothesis, we conducted a double-blind, placebo-controlled, counterbalanced, four-way crossover study in 32 healthy young adults, where we compared the effects of three doses of L-theanine (100, 200 and 400 mg) with a placebo (distilled water), administered before and 50 min after dosing, on three attentional tasks from the Cambridge Neuropsychological Test Automated Battery [viz. Reaction Time (RTI)-visuomotor speed, Rapid Visual Information Processing (RVP)-sustained attention, and Stop Signal Task (SST)-inhibitory control]. Results were analyzed in dose × time repeated measures ANOVA models, with subsequent pairwise comparisons. RESULTS Active doses significantly improved reaction times in the RTI (100-200 mg) and RVP (200-400 mg) tasks from baseline (p < 0.05), but once controlled for the change-from-baseline caused by placebo, only the RTI simple reaction times showed significant improvements, following 100 mg (Δ = 16.3 ms, p = 0.009) and 200 mg (Δ = 16.9 ms, p = 0.009) of L-theanine. CONCLUSIONS Consistent with our hypothesis, these findings suggest that L-theanine significantly improves attention in simple visuomotor tasks, but not in more complex sustained attention tasks, or executive control tasks that require top-down inhibition of pre-active responses.
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Affiliation(s)
- Tharaka L Dassanayake
- Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
- School of Psychological Sciences, The University of Newcastle, Callaghan, Australia
| | - Devasmitha Wijesundara
- Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
| | - Chanaka N Kahathuduwa
- Department of Psychiatry, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
- Department of Laboratory Science and Primary Care, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Vajira S Weerasinghe
- Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
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12
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Zhang Y, Kim C, Wasif N, Li Y, Huang Y, Kobayashi S, Udo-Bellner L, Stout R, Ojamaa K. Alcohol and caffeine synergistically induce spontaneous ventricular tachyarrhythmias: ameliorated with dantrolene treatment. Heart Rhythm O2 2023; 4:549-555. [PMID: 37744935 PMCID: PMC10513921 DOI: 10.1016/j.hroo.2023.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023] Open
Abstract
Background Alcohol and caffeine are the 2 frequently consumed substances in the general population, and the 2 substances are frequently co-consumed. Both substances may increase cardiac arrhythmia risk. However, it is unknown whether alcohol and caffeine co-consumption can synergistically enhance cardiac arrhythmogenesis. Objective The study sought to investigate whether caffeine and binge drinking synergistically affect cardiac arrhythmogenesis. Methods A binge drinking rat model (alcohol 2 g/kg, intraperitoneal, every other day for 3 times) was used. Rats (4 months old, both sexes) were randomized into the following 4 groups: binge alcohol-only group (A) (n = 8), nonalcohol, caffeine-only (60 mg/kg, intraperitoneal) group (C) (n = 8), binge alcohol plus caffeine group (A+C) (n = 8), and binge alcohol + caffeine + dantrolene group (A+D) (n = 7, treated with dantrolene 10 mg/kg before each alcohol injection). We also investigated whether alcohol induces Ca2+ sparks and dantrolene treatment attenuates alcohol-induced Ca2+ leak in ventricular myocytes. Results No arrhythmia was induced with caffeine alone (group C, n = 0 of 8) or alcohol alone (group A, n = 0 of 8). However, alcohol + caffeine induced spontaneous ventricular tachyarrhythmias in all rats (group A+C, n = 8 of 8; P < .001 vs group C or A). Dantrolene prevented ventricular tachyarrhythmia induction in all 7 rats (group A+D, n = 0 of 7; P < .001 vs group A+C). In isolated ventricular myocytes, alcohol significantly increased Ca2+ sparks and dantrolene treatment reduced alcohol-induced Ca2+ sparks. Conclusion Co-consumption of caffeine and binge drinking synergistically promote spontaneous ventricular tachyarrhythmias in rats. Dantrolene treatment can decrease alcohol-enhanced Ca2+ sparks in vitro and prevented alcohol and caffeine induced ventricular tachyarrhythmias in vivo.
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Affiliation(s)
- Youhua Zhang
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
| | - Christopher Kim
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
| | - Nawal Wasif
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
| | - Ying Li
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
| | - Yuan Huang
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
| | - Satoru Kobayashi
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
| | - Lars Udo-Bellner
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
| | - Randy Stout
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
| | - Kaie Ojamaa
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York
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Chang M, Ma J, Sun Y, Tian L, Liu L, Chen Q, Zhang Z, Wan X, Sun J. γ-Glutamyl-transpeptidase CsGGT2 functions as light-activated theanine hydrolase in tea plant (Camellia sinensis L.). PLANT, CELL & ENVIRONMENT 2023; 46:1596-1609. [PMID: 36757089 DOI: 10.1111/pce.14561] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 01/31/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
Theanine is an important secondary metabolite endowing tea with umami taste and health effects. It is essential to explore the metabolic pathway and regulatory mechanism of theanine to improve tea quality. Here, we demonstrated that the expression patterns of CsGGT2 (γ-glutamyl-transpeptidase), participated in theanine synthesis in vitro in our previous research, are significantly different in the aboveground and underground tissues of tea plants and regulated by light. Light up-regulated the expression of CsHY5, directly binding to the promoter of CsGGT2 and acting as an activator of CsGGT2, with a negative correlation with theanine accumulation. The enzyme activity assays and transient expression in Nicotiana benthamiana showed that CsGGT2, acting as bifunctional protein, synthesize and degrade theanine in vitro and in planta. The results of enzyme kinetics, Surface plasmon resonance (SPR) assays and targeted gene-silencing assays showed that CsGGT2 had a higher substrate affinity of theanine than that of ethylamine, and performed a higher theanine degradation catalytic efficiency. Therefore, light mediates the degradation of theanine in different tissues by regulating the expression of the theanine hydrolase CsGGT2 in tea plants, and these results provide new insights into the degradation of theanine mediated by light in tea plants.
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Affiliation(s)
- Manman Chang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
| | - Jingyu Ma
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
| | - Ying Sun
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
| | - Liying Tian
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
| | - Linlin Liu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
| | - Qi Chen
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
| | - Zhaoliang Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
| | - Jun Sun
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
- College of Horticulture, Anhui Agricultural University, Hefei City, Anhui Province, People's Republic of China
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14
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Salehi Z, Ghosn B, Rahbarinejad P, Azadbakht L. Macronutrients and the state of happiness and mood in undergraduate youth of a military training course. Clin Nutr ESPEN 2023; 53:33-42. [PMID: 36657928 DOI: 10.1016/j.clnesp.2022.11.013] [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: 08/30/2022] [Revised: 11/05/2022] [Accepted: 11/15/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND AND AIMS Previous studies have reported a high prevalence of mental disorders among military organizations. Depression and anxiety are among the most important mental disorders, and depression, suicidal ideation, and violence have been found to be negatively associated with happiness and social support. Therefore, improving mood and increasing happiness can reduce the prevalence of mental disorders in military centers. Diet can improve happiness through specific molecular mechanisms and change our mood by affecting the chemical composition of the brain. Therefore, the present study examined the relationship between the quality and quantity of macronutrients in soldiers' diets with their mood and happiness. METHODS In the current cross-sectional study, 300 healthy soldiers were selected. Food intake data was collected using 168-item semi-quantitative food frequency questionnaire during the last year of their military training 2-year period. Then, we calculated the quality and quantity of macronutrients. Mood was assessed using the Profile of Mood States (POMS) questionnaire and happiness with the Oxford Happiness Questionnaire (OHQ). RESULTS The mean ± standard deviation of participants' age was 23.70 ± 1.76 years. A significant relationship was observed between mood score and carbohydrate quantity (OR: 0.32, 95% CI: 0.12-0.88, P-value for trend = 0.03). This suggests that increasing carbohydrate intake improved the participants' mood. No association was found between mood score with protein quantity (OR: 2.15, 95% CI: 0.80-5.75; P-value for trend = 0.12), and gram of fat intake (OR: 1.95, 95% CI: 0.74-5.13; P-value for trend = 0.15). None of the indicators related to macronutrient quality were significantly associated with happiness and mood scores in young soldiers (P ≥ 0.05). CONCLUSIONS Findings presented in this study showed that increased carbohydrate intake was significantly associated with better mood. However, mood is not related to the amount of proteins and fats and none of the parameters of macronutrient quality. Also, there was no significant relationship between the quantity and quality of macronutrients with happiness score.
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Affiliation(s)
- Zahra Salehi
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Batoul Ghosn
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Pegah Rahbarinejad
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Leila Azadbakht
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran; Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran.
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15
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Matcha Tea Powder's Antidepressant-like Effect through the Activation of the Dopaminergic System in Mice Is Dependent on Social Isolation Stress. Nutrients 2023; 15:nu15030581. [PMID: 36771286 PMCID: PMC9921318 DOI: 10.3390/nu15030581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/02/2023] [Accepted: 01/17/2023] [Indexed: 01/24/2023] Open
Abstract
Matcha tea powder is believed to have various physiological benefits; however, its detailed mechanism of action has been poorly understood. Here, we investigated whether the mental state of mice, due to social isolation stress, affects the antidepressant-like effect of Matcha tea powder by using the tail suspension test. Oral administration of Matcha tea powder reduced the duration of immobility in the stress-susceptible C57BL/6J strain, but not in BALB/c strain. In C57BL/6J mice, SCH23390, a dopamine D1 receptor blocker, prevented Matcha tea powder from exerting its antidepressant-like effect. Matcha tea powder also increased the number of c-Fos-positive cells in the prefrontal cortex (PFC) region and the nucleus accumbens (NAc) region in C57BL/6J mice, but not in BALB/c mice. In contrast, Matcha tea powder did not change the number of c-Fos-positive cells in the ventral tegmental area (VTA) region. Notably, C57BL/6J mice with a shorter immobility time had a higher number of c-Fos-positive cells in the PFC, NAc, and VTA regions. However, no such correlation was observed in the stress-tolerant BALB/c mice. These results suggest that Matcha tea powder exerts an antidepressant-like effect through the activation of the dopaminergic system including the PFC-NAc-VTA circuit and that mental states are important factors affecting the physiological benefits of Matcha tea powder.
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Quan W, Lin Y, Zou H, Li M, Luo J, He Z, Chen J, Liu Z. Can habitual tea drinking be an effective approach against age-related neurodegenerative cognitive disorders: A systematic review and meta-analysis of epidemiological evidence. Crit Rev Food Sci Nutr 2022; 64:5835-5851. [PMID: 36579429 DOI: 10.1080/10408398.2022.2158780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Our present knowledge about the efficacy of tea consumption in improving age-related cognitive disorders is incomplete since previous epidemiological studies provide inconsistent evidence. This unified systematic review and meta-analysis based on updated epidemiological cohort studies and randomized controlled trials (RCTs) evidence aimed to overcome the limitations of previous reviews by examining the efficacy of distinct types of tea consumption. PubMed, Embase, and MEDLINE were searched up to May 20, 2022, and 23 cohorts and 12 cross-sectional studies were included. Random-effects meta-analyses were conducted to obtain pooled RRs or mean differences with 95% CIs. The pooled RRs of the highest versus lowest tea consumption categories were 0.81 (95% CIs: 0.75-0.88) and 0.69 (95% CIs: 0.61-0.77), respectively. The pooled mean difference of four included RCTs revealed a beneficial effect of tea on cognitive dysfunction (MMSE ES: 1.03; 95% CI, 0.14-1.92). Subgroup analyses further demonstrated that green and black tea intake was associated with a lower risk of cognitive disorders in eastern countries, especially in women. The evidence quality was generally low to moderate. The present review provides insight into whether habitual tea consumption can be an effective approach against age-related neurodegenerative cognitive disorders and summarizes potential mechanisms based on currently published literature.
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Affiliation(s)
- Wei Quan
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Yong Lin
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
| | - Huiyu Zou
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, China
| | - Maiquan Li
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, China
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
| | - Jie Luo
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, China
| | - Zhiyong He
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Jie Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu, China
| | - Zhonghua Liu
- National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
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The therapeutic potential of matcha tea: A critical review on human and animal studies. Curr Res Food Sci 2022; 6:100396. [PMID: 36582446 PMCID: PMC9792400 DOI: 10.1016/j.crfs.2022.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/15/2022] [Accepted: 11/17/2022] [Indexed: 11/24/2022] Open
Abstract
Matcha is a powdered form of Japanese green tea that has been gaining global popularity recently. Matcha tea has various health benefits, including an enhancing effect on cognitive function, cardio-metabolic health, and anti-tumorogenesis. To date, randomized clinical trials (RCT) showed that matcha decreases stress, slightly enhances attention and memory, and has no effect on mood. Results regarding the effect of matcha on cognitive function are contradictory and more RCTs are warranted. The cardio-metabolic effects of matcha have only been studied in animals, but findings were more homogenous. Consuming matcha with a high-fat diet resulted in decreased weight gain velocity, food intake, improved serum glucose and lipid profile, reduced inflammatory cytokines and ameliorated oxidative stress. Evidence regarding the anti-tumor function of matcha is very limited. Findings showed that matcha can affect proliferation, viability, antioxidant response, and cell cycle regulation of breast cancer cells. Nonetheless, more studies are needed to examine this effect on different types of cancer cells, and there is also a need to verify it using animal models. Overall, the evidence regarding the effect of matcha tea on cognitive function, cardio-metabolic function, and anti-tumor role is still limited, and conclusions cannot be drawn.
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18
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Associations of tea consumption with cognitive function and mental health among older adults in China. CURRENT PSYCHOLOGY 2022. [DOI: 10.1007/s12144-022-03962-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Cheng N, Bell L, Lamport DJ, Williams CM. Dietary Flavonoids and Human Cognition: A Meta-Analysis. Mol Nutr Food Res 2022; 66:e2100976. [PMID: 35333451 PMCID: PMC9787524 DOI: 10.1002/mnfr.202100976] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 02/09/2022] [Indexed: 12/30/2022]
Abstract
Improving cognition is important in all age groups, from performance in school examinations to prevention of cognitive decline in later life. Dietary polyphenols, in particular flavonoids, have been examined for their benefits to cognitive outcomes. This meta-analysis evaluates the effects of dietary flavonoids on cognition across the lifespan. In January 2020 databases were searched for randomized controlled trials investigating flavonoid effects on human cognition. Eighty studies, comprising 5519 participants, were included in the final meta-analysis. The global analysis indicates dietary flavonoids induced significant benefit to cognitive performance (g = 0.148, p < 0.001), with subgroup analyses revealing that cocoa (g = 0.224, p = 0.036), ginkgo (g = 0.187, p ≤ 0.001), and berries (g = 0.149, p = 0.009) yielded the most notable improvements. Significant benefits were observed from chronic studies, in middle-aged and older adults, and with low and medium doses. The domains of long-term memory, processing speed, and mood showed sensitivity to flavonoid intervention. This meta-analysis provides evidence for the positive effects of flavonoids on cognition and highlights several moderating factors. Flavonoid-based dietary interventions therefore potentially offer a highly accessible, safe, and cost-effective treatment to help tackle the burden of cognitive decline.
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Affiliation(s)
- Nancy Cheng
- School of Psychology and Clinical Language SciencesUniversity of Reading, ReadingUK
| | - Lynne Bell
- School of Psychology and Clinical Language SciencesUniversity of Reading, ReadingUK
| | - Daniel J. Lamport
- School of Psychology and Clinical Language SciencesUniversity of Reading, ReadingUK
| | - Claire M. Williams
- School of Psychology and Clinical Language SciencesUniversity of Reading, ReadingUK
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Zhao Y, Wu C. Childhood maltreatment experiences and emotion perception in young Chinese adults: Sex as a moderator. Stress Health 2022; 38:666-678. [PMID: 34921491 DOI: 10.1002/smi.3122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 12/07/2021] [Accepted: 12/14/2021] [Indexed: 12/14/2022]
Abstract
Men and women seem to perceive and react differently to emotional stimuli and have different susceptibilities to childhood trauma. With a cross-sectional design, this study aimed to investigate whether specific patterns of childhood-maltreatment experiences are associated with specific patterns of emotion perception and the sex differences in this relationship. A total of 173 adults rated valence, arousal, and dominance for 60 pictures (varying in pleasantness, unpleasantness, and neutral emotion) from the International Affective Picture System and completed the Childhood Trauma Questionnaire-Short Form. Using a partial least squares (PLS) regression analysis, after controlling for depressive and anxious states, recent stressful life events, personality, and cognitive reappraisal strategy, we identified a profile (linear combination) of childhood-maltreatment experiences (emotional neglect, physical neglect, and physical abuse) that was associated with a profile of emotion-perception dimensions (perceiving negative visual stimuli as more unpleasant and subservient, positive stimuli as more pleasant and dominant, and neutral stimuli as more arousing). This association pattern was significant only for the male participants. Hence, our findings suggest that childhood maltreatment might make men more "emotional" in their adulthood. The impact of this childhood-maltreatment-associated alteration in emotion perception on male mental health needs further investigation.
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Affiliation(s)
- Yiran Zhao
- School of Nursing, Peking University Health Science Center, Beijing, China
| | - Chao Wu
- School of Nursing, Peking University Health Science Center, Beijing, China
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Boyle NB, Dye L, Lawton CL, Billington J. A Combination of Green Tea, Rhodiola, Magnesium, and B Vitamins Increases Electroencephalogram Theta Activity During Attentional Task Performance Under Conditions of Induced Social Stress. Front Nutr 2022; 9:935001. [PMID: 35938130 PMCID: PMC9355406 DOI: 10.3389/fnut.2022.935001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 06/21/2022] [Indexed: 11/29/2022] Open
Abstract
Background A combination of green tea, rhodiola and magnesium with B vitamins has previously been reported to significantly increase EEG resting state theta, attenuate subjective stress, anxiety and mood disturbance, and heighten subjective and autonomic arousal under acute psychosocial laboratory stress. Here we examine the capacity of green tea and rhodiola extract administered in combination or in isolation with magnesium and B vitamins to moderate spectral brain activity during attentional task performance under stress. Materials and Methods One-hundred moderately stressed adults received oral supplementation of (i) Mg + B vitamins + green tea + rhodiola; (ii) Mg + B vitamins + rhodiola; (iii) Mg + B vitamins + green tea; or (iv) placebo, in a double-blind, randomised, placebo-controlled, parallel-group design (Clinicaltrials.gov: NCT03262376; 25/0817). Participants completed an attention switching and emotionally threatening attentional bias task after stress induction (Trier Social Stress Test). Spectral alpha and theta brain activity and event related potentials (ERPs) were recorded during cognitive task performance by electroencephalogram (EEG; BioSemi ActiveTwo 64 channel). Results The combined treatment of Mg + B vitamins + green tea + rhodiola significantly increased frontal midline theta vs. placebo and rhodiola in isolation during the attention switching task, specifically in anticipation of a change in task performance parameter. The combined treatment also significantly increased contralateral theta activation in relation to viewing emotionally threatening images in the left (vs. placebo and rhodiola in isolation) and right parietal (vs. placebo) regions. Further, this treatment demonstrated significantly heightened ipsilateral left parietal theta activation in relation to viewing emotionally threatening images. The combined treatment attenuated a decrease in alpha power during the attentional bias task evident in comparator treatments, but this did not reach significance. No significant effects of treatments on behavioural performance or ERP were found. Conclusion The combination of Mg + B vitamins + green tea + rhodiola increased spectral theta brain activity during the execution of two attentional tasks suggestive of a potential to increase attentional capacity under conditions of stress. Further examination of these ingredients in relation to attentional performance under stress is warranted to ascertain if functional benefits suggested by theta activation can be shown behaviourally.
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22
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Unno K, Furushima D, Tanaka Y, Tominaga T, Nakamura H, Yamada H, Taguchi K, Goda T, Nakamura Y. Improvement of Depressed Mood with Green Tea Intake. Nutrients 2022; 14:nu14142949. [PMID: 35889906 PMCID: PMC9319139 DOI: 10.3390/nu14142949] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/18/2022] [Accepted: 07/18/2022] [Indexed: 02/04/2023] Open
Abstract
Being in a prolonged depressed state increases the risk of developing depression. To investigate whether green tea intake is effective in improving depression-like moods, we used an experimental animal model of depression with lipopolysaccharide (LPS) and clarified the effects of green tea on the biological stress response and inflammation in the brain. Regarding the stress reduction effect of green tea, we found that the sum of caffeine (C) and epigallocatechin gallate (E) relative to the sum of theanine (T) and arginine (A), the major components of green tea, or the CE/TA ratio, is important. The results showed that depression-like behavior, adrenal hypertrophy as a typical stress response, and brain inflammation were suppressed in mice fed green tea components with CE/TA ratios of 2 to 8. In addition, the expression of Npas4, which is reduced in anxiety and depression, was maintained at the same level as controls in mice that consumed green tea with a CE/TA ratio of 4. In clinical human trials, the consumption of green tea with CE/TA ratios of 3.9 and 4.7 reduced susceptibility to subjective depression. These results suggest that the daily consumption of green tea with a CE/TA ratio of 4–5 is beneficial to improving depressed mood.
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Affiliation(s)
- Keiko Unno
- Tea Science Center, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
- Correspondence: ; Tel.: +81-54-264-5822
| | - Daisuke Furushima
- Department of Drug Evaluation & Informatics Graduate School of Pharmaceutical Science, University of Shizuoka, Shizuoka 422-8526, Japan; (D.F.); (Y.T.); (T.T.); (H.N.); (H.Y.)
- Faculty of Medicine School of Health Science, Kagoshima University, Kagoshima 890-8544, Japan
| | - Yuya Tanaka
- Department of Drug Evaluation & Informatics Graduate School of Pharmaceutical Science, University of Shizuoka, Shizuoka 422-8526, Japan; (D.F.); (Y.T.); (T.T.); (H.N.); (H.Y.)
| | - Takeichiro Tominaga
- Department of Drug Evaluation & Informatics Graduate School of Pharmaceutical Science, University of Shizuoka, Shizuoka 422-8526, Japan; (D.F.); (Y.T.); (T.T.); (H.N.); (H.Y.)
| | - Hirotomo Nakamura
- Department of Drug Evaluation & Informatics Graduate School of Pharmaceutical Science, University of Shizuoka, Shizuoka 422-8526, Japan; (D.F.); (Y.T.); (T.T.); (H.N.); (H.Y.)
| | - Hiroshi Yamada
- Department of Drug Evaluation & Informatics Graduate School of Pharmaceutical Science, University of Shizuoka, Shizuoka 422-8526, Japan; (D.F.); (Y.T.); (T.T.); (H.N.); (H.Y.)
| | - Kyoko Taguchi
- Tea Science Center, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
| | - Toshinao Goda
- Faculty of Food and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan;
| | - Yoriyuki Nakamura
- Tea Science Center, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan; (K.T.); (Y.N.)
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23
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Lange KW, Nakamura Y, Lange KM, Zhao H. Tea and depression. FOOD SCIENCE AND HUMAN WELLNESS 2022. [DOI: 10.1016/j.fshw.2021.12.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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24
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Lange KW. Tea in cardiovascular health and disease: a critical appraisal of the evidence. FOOD SCIENCE AND HUMAN WELLNESS 2022. [DOI: 10.1016/j.fshw.2021.12.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Noah L, Morel V, Bertin C, Pouteau E, Macian N, Dualé C, Pereira B, Pickering G. Effect of a Combination of Magnesium, B Vitamins, Rhodiola, and Green Tea (L-Theanine) on Chronically Stressed Healthy Individuals-A Randomized, Placebo-Controlled Study. Nutrients 2022; 14:nu14091863. [PMID: 35565828 PMCID: PMC9102162 DOI: 10.3390/nu14091863] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 02/05/2023] Open
Abstract
The effect of a combination of magnesium, vitamins B6, B9, B12, rhodiola and green tea/L-theanine (Mg-Teadiola) on stress was evaluated in chronically stressed, otherwise healthy individuals. Effects on stress-related quality-of-life parameters (sleep and perception of pain) were also explored. Adults with stress for ≥1 month, scoring ≥14 points on the Depression Anxiety Stress Scale (DASS)-42 questionnaire, were randomized (1:1) to receive oral Mg-Teadiola (n = 49) or a placebo (n = 51), for 28 days, with a follow-up assessment on Day 56 (NCT04391452). The primary endpoint was the change in the DASS-42 stress score from baseline to Day 28 with Mg-Teadiola versus placebo. The DASS-42 stress scores significantly decreased from baseline to Day 28 with Mg-Teadiola versus placebo (effect size, 0.29; 95% CI [0.01, 0.57]; p = 0.04). Similar reductions were observed on Day 14 (p = 0.006) and Day 56 (p = 0.02). A significant reduction in sensitivity to cold pain (p = 0.01) and a trend for lower sensitivity to warm pain was observed (p = 0.06) on Day 28. Improvements in daytime dysfunction due to sleepiness (Pittsburgh Sleep Quality Index-7 component score) were reported on Day 28, and were significant on Day 56 (p < 0.001). Mg-Teadiola is effective in managing stress in otherwise healthy individuals. Its beneficial effects on sleep and pain perception need further investigation.
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Affiliation(s)
- Lionel Noah
- Sanofi, 82, Avenue Raspail, 94250 Gentilly, France; (C.B.); (E.P.)
- Correspondence:
| | - Veronique Morel
- CIC INSERM 1405/Plateforme d’Investigation Clinique CHU Gabriel Montpied, 58 Rue Montalembert, CEDEX 1, 63000 Clermont-Ferrand, France; (V.M.); (N.M.); (C.D.); (B.P.); (G.P.)
| | - Claire Bertin
- Sanofi, 82, Avenue Raspail, 94250 Gentilly, France; (C.B.); (E.P.)
| | - Etienne Pouteau
- Sanofi, 82, Avenue Raspail, 94250 Gentilly, France; (C.B.); (E.P.)
| | - Nicolas Macian
- CIC INSERM 1405/Plateforme d’Investigation Clinique CHU Gabriel Montpied, 58 Rue Montalembert, CEDEX 1, 63000 Clermont-Ferrand, France; (V.M.); (N.M.); (C.D.); (B.P.); (G.P.)
| | - Christian Dualé
- CIC INSERM 1405/Plateforme d’Investigation Clinique CHU Gabriel Montpied, 58 Rue Montalembert, CEDEX 1, 63000 Clermont-Ferrand, France; (V.M.); (N.M.); (C.D.); (B.P.); (G.P.)
| | - Bruno Pereira
- CIC INSERM 1405/Plateforme d’Investigation Clinique CHU Gabriel Montpied, 58 Rue Montalembert, CEDEX 1, 63000 Clermont-Ferrand, France; (V.M.); (N.M.); (C.D.); (B.P.); (G.P.)
| | - Gisèle Pickering
- CIC INSERM 1405/Plateforme d’Investigation Clinique CHU Gabriel Montpied, 58 Rue Montalembert, CEDEX 1, 63000 Clermont-Ferrand, France; (V.M.); (N.M.); (C.D.); (B.P.); (G.P.)
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26
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Li W, Yue L, Xiao S. Prospective Associations of Tea Consumption With Risk of Cognitive Decline in the Elderly: A 1-Year Follow-Up Study in China. Front Nutr 2022; 9:752833. [PMID: 35265653 PMCID: PMC8899511 DOI: 10.3389/fnut.2022.752833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 01/27/2022] [Indexed: 11/13/2022] Open
Abstract
Background Previous studies show that the consumption of tea is associated with several beneficial outcomes for brain health, but there is little data among the elderly in China. Objective The objective was to explore the longitudinal relationship between tea consumption and the risk of cognitive decline. Methods The current data was obtained from the China Longitudinal Aging Study (CLAS), and a total of 3,246 residents aged 60 years and above were recruited in this study. Some of them (N = 111) underwent a standard T1-weighted magnetic resonance imaging (MRI), from which the volumes of the corpus callosum (CC) and hippocampus were calculated, and detailed tea consumption information was obtained through a standardized questionnaire at baseline. The cognitive diagnosis of each participant was made by attending psychiatrists at baseline and follow-up. Their overall cognitive function was assessed by the Montreal Cognitive Assessment (MoCA), while their associative learning ability was assessed by an associative learning test (ALT). Finally, 1,545 elderly with normal cognitive function completed the baseline and follow-up assessment and were included in the final study. Results After controlling gender, education, smoking, take exercise and hobbies, we found that the elderly with tea consumption habits had a lower incidence rate of cognitive decline (p = 0.002, OR = 0.604, 95%CI:0.437~0.836) and tea consumption was negatively correlated with the change scores of MoCA (r = -0.056, p = 0.029). What's more, the CC_posterior volume of tea drinkers was significantly smaller than that of non-tea drinkers, while the baseline ALT score of tea drinkers was significantly higher than that of non-tea drinkers. The results of correlation analysis showed that the CC_posterior volume was significantly correlated with ALT change score (r = -0.319, p = 0.010). Conclusions The habit of tea consumption is associated with less incidence of cognitive impairment among the Chinese elderly, and it may prevent a decline in memory and associative learning by affecting the volume of the posterior corpus callosum.
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Affiliation(s)
- Wei Li
- Department of Geriatric Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Geriatric Psychiatry, Alzheimer's Disease and Related Disorders Center, Shanghai Jiao Tong University, Shanghai, China
| | - Ling Yue
- Department of Geriatric Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Geriatric Psychiatry, Alzheimer's Disease and Related Disorders Center, Shanghai Jiao Tong University, Shanghai, China
| | - Shifu Xiao
- Department of Geriatric Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Geriatric Psychiatry, Alzheimer's Disease and Related Disorders Center, Shanghai Jiao Tong University, Shanghai, China
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27
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Wei Y, Xu J, Miao S, Wei K, Peng L, Wang Y, Wei X. Recent advances in the utilization of tea active ingredients to regulate sleep through neuroendocrine pathway, immune system and intestinal microbiota. Crit Rev Food Sci Nutr 2022; 63:7598-7626. [PMID: 35266837 DOI: 10.1080/10408398.2022.2048291] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Sleep disorders have received widespread attention nowadays, which have been promoted by the accelerated pace of life, unhealthy diets and lack of exercise in modern society. The chemical medications to improve sleep has shown serious side effects and risks with high costs. Therefore, it is urgent to develop efficient nutraceuticals from natural sources to ensure sleep quality as a sustainable strategy. As the second most consumed beverage worldwide, the health-promoting effects of tea have long been widely recognized. However, the modulatory effect of teas on sleep disorders has received much less attention. Tea contains various natural sleep-modulating active ingredients such as L-theanine (LTA), caffeine, tea polyphenols (TPP), tea pigments, tea polysaccharides (TPS) and γ-aminobutyric acid (GABA). This review focuses on the potential influence and main regulating mechanisms of different tea active ingredients on sleep, including being absorbed by the small intestine and then cross the blood-brain barrier to act on neurons in the brain as neurotransmitters, manipulating the immune system and further affect sleep-wake cycle by regulating the levels of cytokines, and controlling the gut microbes to maintain the homeostasis of circadian rhythm. Current research progress and limitations are summarized and several future development directions are also proposed. This review hopes to provide new insights into the future elucidation of the sleep-regulating mechanisms of different teas and their natural active ingredients and the development of tea-based functional foods for alleviating sleep disorders. HighlightsNatural sleep-modulating active ingredients in tea have been summarized.Influences of drinking tea or tea active ingredients on sleep are reviewed.Three main regulating mechanisms of tea active ingredients on sleep are explained.The associations among nervous system, immune system and intestinal microbiota are investigated.The potential of developing delivery carriers for tea active ingredients is proposed.
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Affiliation(s)
- Yang Wei
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Jia Xu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Siwei Miao
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Kang Wei
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Lanlan Peng
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Yuanfeng Wang
- College of Life Sciences, Shanghai Normal University, Shanghai, P.R. China
| | - Xinlin Wei
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
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28
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Can Nutrients and Dietary Supplements Potentially Improve Cognitive Performance Also in Esports? Healthcare (Basel) 2022; 10:healthcare10020186. [PMID: 35206801 PMCID: PMC8872051 DOI: 10.3390/healthcare10020186] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/11/2022] [Accepted: 01/14/2022] [Indexed: 12/13/2022] Open
Abstract
Factors influencing brain function and cognitive performance can be critical to athletic performance of esports athletes. This review aims to discuss the potential beneficial effects of micronutrients, i.e., vitamins, minerals and biologically active substances on cognitive functions of e-athletes. Minerals (iodine, zinc, iron, magnesium) and vitamins (B vitamins, vitamins E, D, and C) are significant factors that positively influence cognitive functions. Prevention of deficiencies of the listed ingredients and regular examinations can support cognitive processes. The beneficial effects of caffeine, creatine, and probiotics have been documented so far. There are many plant products, herbal extracts, or phytonutrients that have been shown to affect precognitive activity, but more research is needed. Beetroot juice and nootropics can also be essential nutrients for cognitive performance. For the sake of players’ eyesight, it would be useful to use lutein, which, in addition to improving vision and protecting against eye diseases, can also affect cognitive functions. In supporting the physical and mental abilities of e-athletes the base is a well-balanced diet with adequate hydration. There is a lack of sufficient evidence that has investigated the relationship between dietary effects and improved performance in esports. Therefore, there is a need for randomized controlled trials involving esports players.
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29
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Lorca C, Mulet M, Arévalo-Caro C, Sanchez MÁ, Perez A, Perrino M, Bach-Faig A, Aguilar-Martínez A, Vilella E, Gallart-Palau X, Serra A. Plant-derived nootropics and human cognition: A systematic review. Crit Rev Food Sci Nutr 2022; 63:5521-5545. [PMID: 34978226 DOI: 10.1080/10408398.2021.2021137] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Substances with modulatory capabilities on certain aspects of human cognition have been revered as nootropics from the dawn of time. The plant kingdom provides most of the currently available nootropics of natural origin. Here, in this systematic review, we aim to provide state-of-the-art information regarding proven and unproven effects of plant-derived nootropics (PDNs) on human cognition in conditions of health and disease. Six independent searches, one for each neurocognitive domain (NCD), were performed in parallel using three independent scientific library databases: PubMed, Cochrane and Scopus. Only scientific studies and systematic reviews with humans published between January 2000 and November 2021 were reviewed, and 256 papers were included. Ginkgo biloba was the most relevant nootropic regarding perceptual and motor functions. Bacopa monnieri improves language, learning and memory. Withania somnifera (Ashwagandha) modulates anxiety and social-related cognitions. Caffeine enhances attention and executive functions. Together, the results from the compiled studies highlight the nootropic effects and the inconsistencies regarding PDNs that require further research.Supplemental data for this article is available online at https://doi.org/10.1080/10408398.2021.2021137.
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Affiliation(s)
- Cristina Lorca
- IMDEA-Food Research Institute, +Pec Proteomics, Campus of International Excellence UAM + CSIC, Old Cantoblanco Hospital, Madrid, Spain
- Biomedical Research Institute of Lleida Dr. Pifarré Foundation (IRB Lleida) - Neuroscience Area - University Hospital Arnau de Vilanova (HUAV) - School of Medicine, University of Lleida (UdL), Lleida, Spain
- Proteored - Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - María Mulet
- Biomedical Research Institute of Lleida Dr. Pifarré Foundation (IRB Lleida) - Neuroscience Area - University Hospital Arnau de Vilanova (HUAV) - School of Medicine, University of Lleida (UdL), Lleida, Spain
| | - Catalina Arévalo-Caro
- Biomedical Research Institute of Lleida Dr. Pifarré Foundation (IRB Lleida) - Neuroscience Area - University Hospital Arnau de Vilanova (HUAV) - School of Medicine, University of Lleida (UdL), Lleida, Spain
| | - M Ángeles Sanchez
- IMDEA-Food Research Institute, +Pec Proteomics, Campus of International Excellence UAM + CSIC, Old Cantoblanco Hospital, Madrid, Spain
| | - Ainhoa Perez
- IMDEA-Food Research Institute, +Pec Proteomics, Campus of International Excellence UAM + CSIC, Old Cantoblanco Hospital, Madrid, Spain
| | - María Perrino
- IMDEA-Food Research Institute, +Pec Proteomics, Campus of International Excellence UAM + CSIC, Old Cantoblanco Hospital, Madrid, Spain
| | - Anna Bach-Faig
- FoodLab Research Group (2017SGR 83), Faculty of Health Sciences, Open University of Catalonia (UOC), Barcelona, Spain
- Food and Nutrition Area, Barcelona Official College of Pharmacists, Barcelona, Spain
| | - Alicia Aguilar-Martínez
- FoodLab Research Group (2017SGR 83), Faculty of Health Sciences, Open University of Catalonia (UOC), Barcelona, Spain
| | - Elisabet Vilella
- Hospital Universitari Institut Pere Mata (HUIPM), Institut Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- Universitat Rovira i Virgili (URV), Reus, Spain
- Centro de investigación Biomédica en Salud Mental CIBERSAM, Instituto de Salud Carlos III, Madrid, Spain
| | - Xavier Gallart-Palau
- Biomedical Research Institute of Lleida Dr. Pifarré Foundation (IRB Lleida) - Neuroscience Area - University Hospital Arnau de Vilanova (HUAV) - School of Medicine, University of Lleida (UdL), Lleida, Spain
- Proteored - Instituto de Salud Carlos III (ISCIII), Madrid, Spain
- Hospital Universitari Institut Pere Mata (HUIPM), Institut Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- Centro de investigación Biomédica en Salud Mental CIBERSAM, Instituto de Salud Carlos III, Madrid, Spain
| | - Aida Serra
- IMDEA-Food Research Institute, +Pec Proteomics, Campus of International Excellence UAM + CSIC, Old Cantoblanco Hospital, Madrid, Spain
- Biomedical Research Institute of Lleida Dr. Pifarré Foundation (IRB Lleida) - Neuroscience Area - University Hospital Arnau de Vilanova (HUAV) - School of Medicine, University of Lleida (UdL), Lleida, Spain
- Proteored - Instituto de Salud Carlos III (ISCIII), Madrid, Spain
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30
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Kennedy DO, Wightman EL. Mental Performance and Sport: Caffeine and Co-consumed Bioactive Ingredients. Sports Med 2022; 52:69-90. [PMID: 36447122 PMCID: PMC9734217 DOI: 10.1007/s40279-022-01796-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2022] [Indexed: 12/05/2022]
Abstract
The plant defence compound caffeine is widely consumed as a performance enhancer in a sporting context, with potential benefits expected in both physiological and psychological terms. However, although caffeine modestly but consistently improves alertness and fatigue, its effects on mental performance are largely restricted to improved attention or concentration. It has no consistent effect within other cognitive domains that are important to sporting performance, including working memory, executive function and long-term memory. Although caffeine's central nervous system effects are often attributed to blockade of the receptors for the inhibitory neuromodulator adenosine, it also inhibits a number of enzymes involved both in neurotransmission and in cellular homeostasis and signal propagation. Furthermore, it modulates the pharmacokinetics of other endogenous and exogenous bioactive molecules, in part via interactions with shared cytochrome P450 enzymes. Caffeine therefore enjoys interactive relationships with a wide range of bioactive medicinal and dietary compounds, potentially broadening, increasing, decreasing, or modulating the time course of their functional effects, or vice versa. This narrative review explores the mechanisms of action and efficacy of caffeine and the potential for combinations of caffeine and other dietary compounds to exert psychological effects in excess of those expected following caffeine alone. The review focusses on, and indeed restricted its untargeted search to, the most commonly consumed sources of caffeine: products derived from caffeine-synthesising plants that give us tea (Camellia sinensis), coffee (Coffea genus), cocoa (Theabroma cacao) and guaraná (Paullinia cupana), plus multi-component energy drinks and shots. This literature suggests relevant benefits to mental performance that exceed those associated with caffeine for multi-ingredient energy drinks/shots and several low-caffeine extracts, including high-flavanol cocoa and guarana. However, there is a general lack of research conducted in such a way as to disentangle the relative contributions of the component parts of these products.
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Affiliation(s)
- David O. Kennedy
- Brain, Performance and Nutrition Research Centre, Northumbria University, Newcastle-upon-Tyne, NE1 8ST UK
| | - Emma L. Wightman
- Brain, Performance and Nutrition Research Centre, Northumbria University, Newcastle-upon-Tyne, NE1 8ST UK
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31
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Aucoin M, LaChance L, Naidoo U, Remy D, Shekdar T, Sayar N, Cardozo V, Rawana T, Chan I, Cooley K. Diet and Anxiety: A Scoping Review. Nutrients 2021; 13:nu13124418. [PMID: 34959972 PMCID: PMC8706568 DOI: 10.3390/nu13124418] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/23/2021] [Accepted: 12/04/2021] [Indexed: 12/22/2022] Open
Abstract
Anxiety disorders are the most common group of mental disorders. There is mounting evidence demonstrating the importance of nutrition in the development and progression of mental disorders such as depression; however, less is known about the role of nutrition in anxiety disorders. This scoping review sought to systematically map the existing literature on anxiety disorders and nutrition in order to identify associations between dietary factors and anxiety symptoms or disorder prevalence as well as identify gaps and opportunities for further research. The review followed established methodological approaches for scoping reviews. Due to the large volume of results, an online program (Abstrackr) with artificial intelligence features was used. Studies reporting an association between a dietary constituent and anxiety symptoms or disorders were counted and presented in figures. A total of 55,914 unique results were identified. After a full-text review, 1541 articles met criteria for inclusion. Analysis revealed an association between less anxiety and more fruits and vegetables, omega-3 fatty acids, “healthy” dietary patterns, caloric restriction, breakfast consumption, ketogenic diet, broad-spectrum micronutrient supplementation, zinc, magnesium and selenium, probiotics, and a range of phytochemicals. Analysis revealed an association between higher levels of anxiety and high-fat diet, inadequate tryptophan and dietary protein, high intake of sugar and refined carbohydrates, and “unhealthy” dietary patterns. Results are limited by a large percentage of animal and observational studies. Only 10% of intervention studies involved participants with anxiety disorders, limiting the applicability of the findings. High quality intervention studies involving participants with anxiety disorders are warranted.
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Affiliation(s)
- Monique Aucoin
- Canadian College of Naturopathic Medicine, Toronto, ON M2K 1E2, Canada
| | - Laura LaChance
- Department of Psychiatry, McGill University, Montreal, QC H3A 0G4, Canada
- St. Mary's Hospital Centre, Montreal, QC H3T 1M5, Canada
| | - Umadevi Naidoo
- Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Psychiatry, Harvard Medical School, Boston, MA 02115, USA
| | - Daniella Remy
- Canadian College of Naturopathic Medicine, Toronto, ON M2K 1E2, Canada
- Anthrophi Technologies, Toronto, ON M6H1W2, Canada
| | - Tanisha Shekdar
- Canadian College of Naturopathic Medicine, Toronto, ON M2K 1E2, Canada
| | - Negin Sayar
- Canadian College of Naturopathic Medicine, Toronto, ON M2K 1E2, Canada
| | - Valentina Cardozo
- Canadian College of Naturopathic Medicine, Toronto, ON M2K 1E2, Canada
| | - Tara Rawana
- Canadian College of Naturopathic Medicine, Toronto, ON M2K 1E2, Canada
| | - Irina Chan
- Canadian College of Naturopathic Medicine, Toronto, ON M2K 1E2, Canada
| | - Kieran Cooley
- Canadian College of Naturopathic Medicine, Toronto, ON M2K 1E2, Canada
- School of Public Health, Australian Research Centre in Complementary and Integrative Medicine (ARCCIM), University of Technology Sydney, Ultimo 2007, Australia
- Pacific College of Health Sciences, San Diego, CA 92108, USA
- National Centre for Naturopathic Medicine, Southern Cross University, Lismore 2480, Australia
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Anas Sohail A, Ortiz F, Varghese T, Fabara SP, Batth AS, Sandesara DP, Sabir A, Khurana M, Datta S, Patel UK. The Cognitive-Enhancing Outcomes of Caffeine and L-theanine: A Systematic Review. Cureus 2021; 13:e20828. [PMID: 35111479 PMCID: PMC8794723 DOI: 10.7759/cureus.20828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 12/28/2021] [Indexed: 11/25/2022] Open
Abstract
Attention-deficit hyperactivity disorder (ADHD) affects multiple cognitive domains, including impaired attention, hyperactivity, and increased impulsivity. According to the CDC, 9.4% of children between 2 and 17 years old have been diagnosed with ADHD. Neurotransmitters such as noradrenaline and dopamine have been suggested as crucial players in the pathophysiology of ADHD and are often targets of modern medication. Adenosine receptors types A1 and A2a in the brain are inhibited by caffeine: a stimulant known to augment attention by increasing cholinergic and dopaminergic transmission. The cognitive function of attention is also enhanced by the amino acid: L-theanine. The mechanism of action is that it behaves like a glutamate reuptake inhibitor while also acting in the hippocampus as a competitive low-affinity glutamate receptor antagonist. It's also shown to have a neuroprotective effect by its action on the gamma aminobutyric acid (GABA)-A receptors. Our systematic review investigates the literature and clinical trials on the cognitive-enhancing effects of caffeine and L-theanine.
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Affiliation(s)
| | | | - Teresa Varghese
- Medicine, Kasturba Medical College, Manipal University, Manipal, IND
| | - Stephanie P Fabara
- General Medicine, Universidad Catolica de Santiago de Guayaquil, Guayaquil, ECU
| | | | | | - Ahtesham Sabir
- Internal Medicine, Ayub Medical College, Abbottabad, PAK
| | - Mahika Khurana
- Public Health, University of California Berkeley, Berkeley, USA
| | - Shae Datta
- Neurology, NYU Langone Health, New York, USA
| | - Urvish K Patel
- Public Health and Neurology, Icahn School of Medicine at Mount Sinai, New York, USA
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Lin L, Zeng L, Liu A, Yuan D, Peng Y, Zhang S, Li Y, Chen J, Xiao W, Gong Z. Role of Epigallocatechin Gallate in Glucose, Lipid, and Protein Metabolism and L-Theanine in the Metabolism-Regulatory Effects of Epigallocatechin Gallate. Nutrients 2021; 13:4120. [PMID: 34836374 PMCID: PMC8620046 DOI: 10.3390/nu13114120] [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: 10/12/2021] [Revised: 11/10/2021] [Accepted: 11/15/2021] [Indexed: 01/18/2023] Open
Abstract
Epigallocatechin gallate (EGCG) and L-theanine (LTA) are important bioactive components in tea that have shown promising effects on nutrient metabolism. However, whether EGCG alone or combined with LTA can regulate the glucose, lipid, and protein metabolism of healthy rats remains unclear. Therefore, we treated healthy rats with EGCG or the combination of EGCG and LTA (EGCG+LTA) to investigate the effects of EGCG on nutrient metabolism and the role of LTA in the metabolism-regulatory effects of EGCG. The results showed that compared with the control group, EGCG activated insulin and AMP-activated protein kinase (AMPK) signals, thus regulating glucose, lipid, and protein metabolism. Compared with EGCG, EGCG+LTA enhanced hepatic and muscle glycogen levels and suppressed phosphorylation of AMPK, glycogen synthase 2, mammalian target of rapamycin, and ribosomal protein S6 kinase. In addition, EGCG+LTA inhibited the expression of liver kinase B1, insulin receptor and insulin receptor substrate, and promoted the phosphorylation level of acetyl-CoA carboxylase. Furthermore, both EGCG and EGCG+LTA were harmless for young rats. In conclusion, EGCG activated AMPK and insulin pathways, thereby promoting glycolysis, glycogen, and protein synthesis and inhibiting fatty acid (FA) and cholesterol synthesis. However, LTA cooperated with EGCG to promote glycogen metabolism and suppressed the effect EGCG on FA and protein synthesis via AMPK signals.
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Affiliation(s)
- Ling Lin
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Li Zeng
- School of Pharmacy, Shaoyang University, Shaoyang 422002, China;
| | - An Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Dongyin Yuan
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Yingqi Peng
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Sheng Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Yinhua Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Jinhua Chen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Wenjun Xiao
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Zhihua Gong
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China; (L.L.); (A.L.); (D.Y.); (Y.P.); (S.Z.); (Y.L.); (J.C.); (Z.G.)
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
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Trends in Coffee and Tea Consumption during the COVID-19 Pandemic. Foods 2021; 10:foods10102458. [PMID: 34681507 PMCID: PMC8535644 DOI: 10.3390/foods10102458] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 12/15/2022] Open
Abstract
Over the last two years, many countries have enforced confinement to limit both the spread of COVID-19 and the demand for medical care. Confinement has resulted in a disruption of work routines, boredom, depression, and changes in eating habits, among them consumption of coffee and tea. Following six databases, we examined articles tracking consumption of these beverages. Out of 472 articles, including 23 beverage entries, 13 matched our criteria. While no clear trend in coffee consumption during the coronavirus pandemic emerged (7 of 13 studies indicated an increase, accounting for 53.8%), tea consumption clearly increased (70% versus 30%). Considering the global health emergency continuum, more research is needed to better understand the paths underlying food choices and the ways those changes may influence health outcomes, including those related to COVID-19 disease.
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Chen Y, Liu S, Ferreira JFDS, Xiao L, Gu M, Luo Y, Zhang T, Zhang X, Liu Z, Huang J, Tian N. Development and Application of a Fast Gas Chromatographic Method Offer New Insights into l-theanine Production Regulation in Camellia sinensis L. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:11142-11150. [PMID: 34514782 DOI: 10.1021/acs.jafc.1c04093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Tea is the most consumed beverage worldwide, and l-theanine in tea leaves significantly affects their flavor and market quality. We have developed and validated a fast and reliable gas chromatographic method with flame ionization detection (GC-FID) to quantify l-theanine after its extraction from Camellia sinensis (tea plant) and derivatization. The procedure was completed in 40 min, from extraction to chromatographic analysis, with a recovery rate of more than 93% and allowing a high sample throughput. The GC-FID intraday precision was within 0.57-2.28%, while the interday precision ranged from 1.57 to 13.48%. The intraday accuracy ranged from -6.84 to 5.26%, while the interday accuracy ranged from -1.08 to 3.12%. The limit of detection was 2.28 μg/mL, and the limit of quantification was 6.47 μg/mL. The GC-FID method was validated by high-performance liquid chromatography with UV detection (HPLC-UV) and was used to investigate the biosynthesis and regulation of l-theanine in tea plants. We found that plants fed with ethylamine significantly increased l-theanine concentrations in roots, while exogenous supplementation of glutamic acid, carbamide, and glutamine did not significantly affect the l-theanine level in roots. Our results also indicated that roots were not indispensable for the biosynthesis of l-theanine, which was detected in undifferentiated embryonic calluses in concentrations (g/100 g dry weight) as high as in leaves of whole plants (1.67 and 1.57%, respectively) and without any exogenous theanine precursor supplementation.
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Affiliation(s)
- Yanni Chen
- Department of Tea Science, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Shuoqian Liu
- Department of Tea Science, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China
| | - Jorge Freire da Silva Ferreira
- United States Salinity Laboratory, United States Department of Agriculture-Agricultural Research Service, Riverside, California 92507, United States
| | - Lizheng Xiao
- Department of Tea Science, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Meiyi Gu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China
| | - Yiping Luo
- Department of Tea Science, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Tiantian Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China
| | - Xiangqin Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China
| | - Zhonghua Liu
- Department of Tea Science, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China
| | - Jianan Huang
- Department of Tea Science, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China
| | - Na Tian
- Department of Tea Science, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
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Zhang Y, Cheng L, Liu Y, Wu Z, Weng P. The Intestinal Microbiota Links Tea Polyphenols with the Regulation of Mood and Sleep to Improve Immunity. FOOD REVIEWS INTERNATIONAL 2021. [DOI: 10.1080/87559129.2021.1934007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yuting Zhang
- Department of Food Science and Engineering, Ningbo University, Ningbo, P.R. China
| | - Lu Cheng
- Department of Food Science, Rutgers, the State University of New Jersey, New Brunswick, New Jersey, USA
| | - Yanan Liu
- Department of Food Science and Engineering, Ningbo University, Ningbo, P.R. China
| | - Zufang Wu
- Department of Food Science and Engineering, Ningbo University, Ningbo, P.R. China
| | - Peifang Weng
- Department of Food Science and Engineering, Ningbo University, Ningbo, P.R. China
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Feng M, Zheng X, Wan J, Pan W, Xie X, Hu B, Wang Y, Wen H, Cai S. Research progress on the potential delaying skin aging effect and mechanism of tea for oral and external use. Food Funct 2021; 12:2814-2828. [PMID: 33666618 DOI: 10.1039/d0fo02921a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Skin aging is characterized by the gradual loss of elasticity, the formation of wrinkles and various color spots, the degradation of extracellular matrix proteins, and the structural changes of the dermis. With the increasingly prominent problems of environmental pollution, social pressure, ozone layer thinning and food safety, skin problems have become more and more complex. The skin can reflect the overall health of the body. Skincare products for external use alone cannot fundamentally solve skin problems; it needs to improve the overall health of the body. Based on the literature review in recent 20 years, this paper systematically reviewed the potential delaying effect of tea and its active ingredients on skin aging by oral and external use. Tea is the second-largest health drink after water. It is rich in tea polyphenols, l-theanine, tea pigments, caffeine, tea saponins, tea polysaccharides and other secondary metabolites. Tea and its active substances have whitening, nourishing, anti-wrinkle, removing spots and other skincare effects. Its mechanism of action is ultraviolet absorption, antioxidant, anti-inflammatory, inhibition of extracellular matrix aging, inhibiting the accumulation of melanin and toxic oxidation products, balancing intestinal and skin microorganisms, and improving mood and sleep, among other effects. At present, tea elements skincare products are deeply loved by consumers. This paper provides a scientific theoretical basis for tea-assisted beauty and the high-end application of tea in skincare products.
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Affiliation(s)
- Meiyan Feng
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China
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Cannas S, Tonini B, Belà B, Di Prinzio R, Pignataro G, Di Simone D, Gramenzi A. Effect of a novel nutraceutical supplement (Relaxigen Pet dog) on the fecal microbiome and stress-related behaviors in dogs: A pilot study. J Vet Behav 2021. [DOI: 10.1016/j.jveb.2020.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Subjective Effects of Inhaling Kuromoji Tea Aroma. Molecules 2021; 26:molecules26030575. [PMID: 33499197 PMCID: PMC7866097 DOI: 10.3390/molecules26030575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/31/2020] [Accepted: 01/18/2021] [Indexed: 11/17/2022] Open
Abstract
Teas and various herbal teas are well-known beverages and are commonly consumed around the world. In this study, we focused on kuromoji tea. Kuromoji is a deciduous shrub of the Lauraceae family, and the plucked leaves and branches have been drunk as a tea in production areas for a long time. However, no studies have investigated the subjective and physiological effects of kuromoji tea. In this study, the effects of kuromoji tea were examined on the basis of the measurements of heart rate variability and cerebral blood flow, core body temperature and subjective assessments. Moreover, the results of this study showed that a pleasant subjective feeling could be obtained by sniffing the aroma of kuromoji teas, especially tea leaves. It was also found that the aroma of kuromoji teas has the potential to stimulate saliva secretion and increase subjective and physiological excitements in the oral cavity. 1,8-Cineole, linalool, terpinen-4-ol, carvone and geraniol were determined in both kuromoji leaves and branches. In this study, the beneficial effects of kuromoji teas when drunk conventionally were investigated.
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Auxtero MD, Chalante S, Abade MR, Jorge R, Fernandes AI. Potential Herb-Drug Interactions in the Management of Age-Related Cognitive Dysfunction. Pharmaceutics 2021; 13:124. [PMID: 33478035 PMCID: PMC7835864 DOI: 10.3390/pharmaceutics13010124] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 12/25/2022] Open
Abstract
Late-life mild cognitive impairment and dementia represent a significant burden on healthcare systems and a unique challenge to medicine due to the currently limited treatment options. Plant phytochemicals have been considered in alternative, or complementary, prevention and treatment strategies. Herbals are consumed as such, or as food supplements, whose consumption has recently increased. However, these products are not exempt from adverse effects and pharmacological interactions, presenting a special risk in aged, polymedicated individuals. Understanding pharmacokinetic and pharmacodynamic interactions is warranted to avoid undesirable adverse drug reactions, which may result in unwanted side-effects or therapeutic failure. The present study reviews the potential interactions between selected bioactive compounds (170) used by seniors for cognitive enhancement and representative drugs of 10 pharmacotherapeutic classes commonly prescribed to the middle-aged adults, often multimorbid and polymedicated, to anticipate and prevent risks arising from their co-administration. A literature review was conducted to identify mutual targets affected (inhibition/induction/substrate), the frequency of which was taken as a measure of potential interaction. Although a limited number of drugs were studied, from this work, interaction with other drugs affecting the same targets may be anticipated and prevented, constituting a valuable tool for healthcare professionals in clinical practice.
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Affiliation(s)
- Maria D. Auxtero
- CiiEM, Interdisciplinary Research Centre Egas Moniz, Instituto Universitário Egas Moniz, Quinta da Granja, Monte de Caparica, 2829-511 Caparica, Portugal; (M.D.A.); (S.C.); (M.R.A.); (R.J.)
| | - Susana Chalante
- CiiEM, Interdisciplinary Research Centre Egas Moniz, Instituto Universitário Egas Moniz, Quinta da Granja, Monte de Caparica, 2829-511 Caparica, Portugal; (M.D.A.); (S.C.); (M.R.A.); (R.J.)
| | - Mário R. Abade
- CiiEM, Interdisciplinary Research Centre Egas Moniz, Instituto Universitário Egas Moniz, Quinta da Granja, Monte de Caparica, 2829-511 Caparica, Portugal; (M.D.A.); (S.C.); (M.R.A.); (R.J.)
| | - Rui Jorge
- CiiEM, Interdisciplinary Research Centre Egas Moniz, Instituto Universitário Egas Moniz, Quinta da Granja, Monte de Caparica, 2829-511 Caparica, Portugal; (M.D.A.); (S.C.); (M.R.A.); (R.J.)
- Polytechnic Institute of Santarém, School of Agriculture, Quinta do Galinheiro, 2001-904 Santarém, Portugal
- CIEQV, Life Quality Research Centre, IPSantarém/IPLeiria, Avenida Dr. Mário Soares, 110, 2040-413 Rio Maior, Portugal
| | - Ana I. Fernandes
- CiiEM, Interdisciplinary Research Centre Egas Moniz, Instituto Universitário Egas Moniz, Quinta da Granja, Monte de Caparica, 2829-511 Caparica, Portugal; (M.D.A.); (S.C.); (M.R.A.); (R.J.)
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Sakurai K, Shen C, Ezaki Y, Inamura N, Fukushima Y, Masuoka N, Hisatsune T. Effects of Matcha Green Tea Powder on Cognitive Functions of Community-Dwelling Elderly Individuals. Nutrients 2020; 12:nu12123639. [PMID: 33256220 PMCID: PMC7760932 DOI: 10.3390/nu12123639] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/21/2020] [Accepted: 11/24/2020] [Indexed: 12/19/2022] Open
Abstract
Matcha Green Tea Powder contains a variety of active ingredients beneficial to health, such as tea catechins, lutein and vitamin K. It is also known that these ingredients confer benefits upon cognitive functions of elderly people. Therefore, we aimed to investigate the relationship between a daily supplementation of Matcha and the change in cognitive functions of community-dwelling elderly people. A randomized, double-blind, placebo-controlled 12-week trial was performed. Sixty-one participants were recruited and randomly assigned to receive test drink containing 3 g powder from fresh Matcha or placebo powder per day. Changes in cognitive function were assessed utilizing a psychometric test battery. Daily food intake was assessed by a Brief-type Self-administered Diet History Questionnaire (BDHQ). In the gender-specific analysis, a significant cognitive enhancement was observed in the Montreal Cognitive Assessment (MoCA) score in the active group of women. In dietary analysis, we found a significant inverse correlation between consumption of vitamin K in daily diet, excluding test drinks, and change in MoCA. The present study suggests that daily supplementation of Matcha Green Tea Powder has protective effects against cognitive decline in community-dwelling elderly women.
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Affiliation(s)
- Keisuke Sakurai
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8562, Japan; (K.S.); (C.S.); (Y.E.); (N.M.)
| | - Chutong Shen
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8562, Japan; (K.S.); (C.S.); (Y.E.); (N.M.)
| | - Yuri Ezaki
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8562, Japan; (K.S.); (C.S.); (Y.E.); (N.M.)
| | - Noriko Inamura
- Community Health Promotion Laboratory, Mitsui Fudosan, Co., Ltd., Kashiwa 277-8519, Japan;
- Urban Design Center Kashiwanoha (UDCK), Kashiwa 277-0871, Japan
| | - Yoichi Fukushima
- Marketing & Communications Division, Nestle Japan Ltd., Tokyo 140-0002, Japan;
| | - Nobutaka Masuoka
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8562, Japan; (K.S.); (C.S.); (Y.E.); (N.M.)
| | - Tatsuhiro Hisatsune
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8562, Japan; (K.S.); (C.S.); (Y.E.); (N.M.)
- Correspondence: ; Tel.: +81-4-7136-3632
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Okello EJ, Mendonça N, Stephan B, Muniz-Terrera G, Wesnes K, Siervo M. Tea consumption and measures of attention and psychomotor speed in the very old: the Newcastle 85+ longitudinal study. BMC Nutr 2020; 6:57. [PMID: 33042566 PMCID: PMC7537102 DOI: 10.1186/s40795-020-00361-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 07/14/2020] [Indexed: 12/27/2022] Open
Abstract
Background A number of studies have indicated a beneficial effect of tea consumption on the reduction of risk of cognitive impairment and dementia in older aged populations. However, there is a paucity of data on these associations in the very old, defined as individuals aged 85 years and over. We investigated the relationship between tea consumption in the very old and measures of global cognitive function, memory, attention and psychomotor speed. Method Longitudinal (5-years), population-based cohort study of individuals aged 85+ years in the North East of England, United Kingdom. Participants were community-dwelling and institutionalized men and women recruited through general medical practices (n = 676). Baseline tea consumption and longitudinal measures of global and domain specific (memory, speed and attention) cognitive function were assessed. Linear mixed models, controlling for demographic (e.g. age, sex and education) and health variables were used to determine whether tea consumption was protective against cognitive decline. Results Tea consumption was not associated with cognitive function at baseline on any measure (unadjusted and adjusted analyses). In the linear mixed effects models adjusted for age, sex, education and disease co-morbidity, higher tea consumption was associated with significantly better attention (focused and sustained attention), and psychomotor speed (complex tasks only) over five-years follow-up. However, there was no association between tea consumption and global cognitive function, memory or performance on simple speed tasks over time. Conclusions In this cohort study of non-demented very old adults we found that higher (vs. lower) tea consumption was associated with better performance over time on measures of focused and sustained attention and some psychomotor speed tasks. No associations with global cognition, memory or easy speed tasks (simple Reaction Time or Word Recognition) were detected. The results have implications for the development of possible diet-based interventions focused on improving cognitive function in the very old age group. These findings need to be confirmed in a sufficiently powered and well-designed RCT with non-demented very old adults.
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Affiliation(s)
- Edward Jonathan Okello
- Human Nutrition Research Centre, Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, NE1 7RU UK
| | - Nuno Mendonça
- EpiDoC Unit, NOVA Medical School, Universidade Nova de Lisboa (NMS-UNL), Lisbon, Portugal.,Comprehensive Health Research Centre (CHRC), Lisbon, Portugal
| | - Blossom Stephan
- Institute of Mental Health, School of Medicine, University of Nottingham, Innovation Park, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU UK
| | - Graciela Muniz-Terrera
- Centre for Dementia Prevention, University of Edinburgh, Royal Edinburgh Hospital, Edinburgh, EH16 4UX UK
| | - Keith Wesnes
- Wesnes Cognition Ltd, Streatley on Thames, RG8 9RD UK
| | - Mario Siervo
- Institute of Mental Health, School of Medicine, University of Nottingham, Innovation Park, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU UK
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Association Between Dietary Flavonoids Intake and Cognitive Function in an Italian Cohort. Biomolecules 2020; 10:biom10091300. [PMID: 32916935 PMCID: PMC7565262 DOI: 10.3390/biom10091300] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/05/2020] [Accepted: 09/08/2020] [Indexed: 12/19/2022] Open
Abstract
Background: Diet is one of the leading factors contributing to the prevalence of non-communicable diseases, including neurodegenerative disorders. Dietary polyphenols, antioxidant components and anti-inflammatory agents of plant-based foods rich diets have been shown to modulate neuro-inflammation, adult neurogenesis and brain signaling, all of which are linked to cognitive function. As epidemiological evidence is limited and the results are contradictory, the aim of this study is to explore the association between dietary flavonoid intake and cognitive health among the adult population living in the Mediterranean area. Methods: The demographic and dietary habits of 808 adults living in southern Italy were analyzed. Food frequency questionnaires (FFQs) were used to assess dietary intake. Data on the polyphenol content in foods were estimated using the Phenol-Explorer database. The Short Portable Mental Status Questionnaire was used as a screening tool for cognitive status. Multivariate logistic regression analyses were used to assess the associations. Results: A significant inverse association between higher dietary intake of total flavonoids (Q4 vs. Q1: OR = 0.39, 95% CI: 0.15, 1.00) and impaired cognitive status was found. Among individual subclasses of flavonoids, flavan-3-ols (Q3 vs. Q1: OR = 0.30, 95% CI: 0.11, 0.76), catechins (Q4 vs. Q1: OR = 0.24, 95% CI: 0.08, 0.72), anthocyanins (Q4 vs. Q1: OR = 0.38, 95% CI: 0.14, 1.00) and flavonols (Q3 vs. Q1: OR = 0.30, 95% CI: 0.11, 0.76) were associated with cognitive health. Among individual polyphenols, only quercetin was associated with cognitive health (Q4 vs. Q1: OR = 0.30, 95% CI: 0.10, 0.91). Conclusions: The results of this study suggest that higher dietary intake of flavonoids may be associated with better cognitive health among adult individuals.
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Williams J, D’Cunha NM, Anstice N, McKune A, Naumovski N. Effect of Green Tea Amino Acid L-Theanine on Physiological Responses: A Protocol for Clinical Trial. EXPLORATORY RESEARCH AND HYPOTHESIS IN MEDICINE 2020; 000:1-8. [DOI: 10.14218/erhm.2020.00048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kahathuduwa CN, Wakefield S, West BD, Blume J, Dassanayake TL, Weerasinghe VS, Mastergeorge A. Effects of L-theanine-caffeine combination on sustained attention and inhibitory control among children with ADHD: a proof-of-concept neuroimaging RCT. Sci Rep 2020; 10:13072. [PMID: 32753637 PMCID: PMC7403383 DOI: 10.1038/s41598-020-70037-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 07/21/2020] [Indexed: 01/01/2023] Open
Abstract
We examined the acute effects of L-theanine, caffeine and their combination on sustained attention, inhibitory control and overall cognition in boys with attention deficit hyperactivity disorder (ADHD). L-Theanine (2.5 mg/kg), caffeine (2.0 mg/kg), their combination and a placebo were administered in a randomized four-way repeated-measures crossover with washout, to five boys (8-15 years) with ADHD. Functional magnetic resonance imaging (fMRI) was performed during a Go/NoGo task and a Stop-signal task ~ 1 h post-dose. NIH Cognition Toolbox was administered ~ 2 h post-dose. Treatment vs. placebo effects were examined in multi-level mixed-effects models. L-Theanine improved total cognition composite in NIH Cognition Toolbox (p = 0.040) vs. placebo. Caffeine worsened and L-theanine had a trend of worsening inhibitory control (i.e. increased Stop-signal reaction time; p = 0.031 and p = 0.053 respectively). L-Theanine-caffeine combination improved total cognition composite (p = 0.041), d-prime in the Go/NoGo task (p = 0.033) and showed a trend of improvement of inhibitory control (p = 0.080). L-Theanine-caffeine combination was associated with decreased task-related reactivity of a brain network associated with mind wandering (i.e. default mode network). L-Theanine-caffeine combination may be a potential therapeutic option for ADHD-associated impairments in sustained attention, inhibitory control and overall cognitive performance.
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Affiliation(s)
- Chanaka N Kahathuduwa
- Department of Laboratory Sciences and Primary Care, School of Health Professions, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, TX, USA.
- Department of Psychiatry, School of Medicine, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, TX, USA.
- Department of Human Development and Family Studies, College of Human Sciences, Texas Tech University, Lubbock, TX, USA.
| | - Sarah Wakefield
- Department of Psychiatry, School of Medicine, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, TX, USA
- Department of Human Development and Family Studies, College of Human Sciences, Texas Tech University, Lubbock, TX, USA
| | - Blake D West
- Department of Human Development and Family Studies, College of Human Sciences, Texas Tech University, Lubbock, TX, USA
| | - Jessica Blume
- Department of Human Development and Family Studies, College of Human Sciences, Texas Tech University, Lubbock, TX, USA
| | - Tharaka L Dassanayake
- Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
- School of Psychology, The University of Newcastle, Callaghan, NSW, Australia
| | - Vajira S Weerasinghe
- Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
| | - Ann Mastergeorge
- Department of Human Development and Family Studies, College of Human Sciences, Texas Tech University, Lubbock, TX, USA
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Cornelis MC, Weintraub S, Morris MC. Caffeinated Coffee and Tea Consumption, Genetic Variation and Cognitive Function in the UK Biobank. J Nutr 2020; 150:2164-2174. [PMID: 32495843 PMCID: PMC7398783 DOI: 10.1093/jn/nxaa147] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/25/2020] [Accepted: 05/01/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Coffee and tea are the major contributors of caffeine in the diet. Evidence points to the premise that caffeine may benefit cognition. OBJECTIVE We examined the associations of habitual regular coffee or tea and caffeine intake with cognitive function whilst additionally accounting for genetic variation in caffeine metabolism. METHODS We included white participants aged 37-73 y from the UK Biobank who provided biological samples and completed touchscreen questionnaires regarding sociodemographic factors, medical history, lifestyle, and diet. Habitual caffeine-containing coffee and tea intake was self-reported in cups/day and used to estimate caffeine intake. Between 97,369 and 445,786 participants with data also completed ≥1 of 7 self-administered cognitive functioning tests using a touchscreen system (2006-2010) or on home computers (2014). Multivariable regressions were used to examine the association between coffee, tea, or caffeine intake and cognition test scores. We also tested interactions between coffee, tea, or caffeine intake and a genetic-based caffeine-metabolism score (CMS) on cognitive function. RESULTS After multivariable adjustment, reaction time, Pairs Matching, Trail Making test B, and symbol digit substitution, performance significantly decreased with consumption of 1 or more cups of coffee (all tests P-trend < 0.0001). Tea consumption was associated with poor performance on all tests (P-trend < 0.0001). No statistically significant CMS × tea, CMS × coffee, or CMS × caffeine interactions were observed. CONCLUSIONS Our findings, based on the participants of the UK Biobank, provide little support for habitual consumption of regular coffee or tea and caffeine in improving cognitive function. On the contrary, we observed decrements in performance with intakes of these beverages which may be a result of confounding. Whether habitual caffeine intake affects cognitive function therefore remains to be tested.
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Affiliation(s)
- Marilyn C Cornelis
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Sandra Weintraub
- Mesulam Center for Cognitive Neurology and Alzheimer's Disease, Northwestern University Feinberg School of Medicine, Chicago, IL, USA,Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Martha Clare Morris
- Rush Institute for Healthy Aging, Rush University, Chicago, IL, USA,Address correspondence to MCC (e-mail: )
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Zhang C, Yi X, Gao X, Wang M, Shao C, Lv Z, Chen J, Liu Z, Shen C. Physiological and biochemical responses of tea seedlings (Camellia sinensis) to simulated acid rain conditions. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 192:110315. [PMID: 32058162 DOI: 10.1016/j.ecoenv.2020.110315] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/22/2020] [Accepted: 02/06/2020] [Indexed: 06/10/2023]
Abstract
Tea (Camellia sinensis), widely planted in the south of China, and often exposed to acid rain. However, research concerning the impacts of acid rain on physiology and biochemistry of tea plants is still scarce. In this study, we investigated the influence of simulated acid rain (SAR) on plant height, root length, photosynthetic pigment, Fv/Fm, proline, malondialdehyde, antioxidant enzyme activity, total nitrogen, caffeine, catechins, and free amino acids. Our results showed that SAR at pH 4.5 did not hinder plant development because growth characteristics, photosynthesis, and ascorbate peroxidase and catalase activities did not decrease at this pH compared to those at the other investigated pH values. However, at pH 3.5 and pH 2.5, the activities of antioxidase and concentrations of malondialdehyde and proline increased significantly in response to the decrease of photosynthetic pigments and Fv/Fm. In addition, the increase in acidity increased total nitrogen, certain amino acid content (theanine, cysteine), and decreased catechin and caffeine contents, resulting in an imbalance of the carbon and nitrogen metabolisms. Our results indicated that SAR at pH 3.5 and pH 2.5 could restrict photosynthesis and the antioxidant defense system, causing metabolic disorders and ultimately affecting plant development and growth, but SAR at pH 4.5 had no toxic effects on tea seedlings when no other stress factors are involved.
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Affiliation(s)
- Chenyu Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China.
| | - Xiaoqin Yi
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Xizhi Gao
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Minhan Wang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Chenyu Shao
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Zhidong Lv
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Jianjiao Chen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China
| | - Chengwen Shen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Center of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, 410128, China.
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Impact of Tea and Coffee Consumption on Cognitive Performance: An fNIRS and EDA Study. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10072390] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Coffee and tea are two of the most popular beverages in the world and have been consumed for more than a thousand years. They have become an integral part of the day for many consumers and may aid not only increased social interactions but also productivity. However, there is no conclusive evidence of their comparative effect on cognitive ability. This study investigated the impact of tea and coffee products on cognitive performance in typical office work-related tasks using brain, body, and behavioral measures. In a controlled multi-day study, we explored the effects of both traditional and cognition-enhancing hot beverages through task performance and self-reported measures. A total of 120 participants completed three work-related tasks from different cognitive domains and consumed either a traditional or cognition-enhancing hot beverage. During the study, we measured brain activity in the prefrontal cortex using functional near-infrared spectroscopy (fNIRS) as well as arousal from skin conductance through electrodermal activity (EDA) while participants completed cognitive tasks and consumed the beverages. Neural efficiency was used to evaluate cognitive performance in the tasks. Neural efficiency was calculated from a composite score of behavioral efficiency and cognitive effort, and emotional arousal was estimated from EDA activity. Results indicated that for different cognitive domains, the enhanced hot beverages showed improved neural efficiency over that of a traditional hot beverage. This is the first study to assess the impact of both traditional and cognition-enhancing drinks using a multimodal approach for workplace-related assignments.
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Williams JL, Everett JM, D'Cunha NM, Sergi D, Georgousopoulou EN, Keegan RJ, McKune AJ, Mellor DD, Anstice N, Naumovski N. The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2020; 75:12-23. [PMID: 31758301 DOI: 10.1007/s11130-019-00771-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The green tea amino acid, L-theanine (L-THE) is associated with several health benefits, including improvements in mood, cognition and a reduction of stress and anxiety-like symptoms. This systematic review evaluated the effect of pure L-THE intake, in the form of orally administered nutritional supplements, on stress responses and anxiety levels in human randomised controlled trials. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) checklist, 9 peer-reviewed journal articles were identified where L-THE as a supplement was compared to a control. Our findings suggest that supplementation of 200-400 mg/day of L-THE may assist in the reduction of stress and anxiety in people exposed to stressful conditions. Despite this finding, longer-term and larger cohort clinical studies, including those where L-THE is incorporated into the diet regularly, are needed to clinically justify the use of L-THE as a therapeutic agent to reduce stress and anxiety in people exposed to stressful conditions.
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Affiliation(s)
- Jackson L Williams
- Faculty of Health, University of Canberra, Canberra, ACT, 2601, Australia
- Collaborative Research in Bioactives and Biomarkers (CRIBB) Group, University of Canberra, Bruce, ACT, 2601, Australia
| | - Julian M Everett
- Faculty of Health, University of Canberra, Canberra, ACT, 2601, Australia
| | - Nathan M D'Cunha
- Faculty of Health, University of Canberra, Canberra, ACT, 2601, Australia
- Collaborative Research in Bioactives and Biomarkers (CRIBB) Group, University of Canberra, Bruce, ACT, 2601, Australia
| | - Domenico Sergi
- Nutrition & Health Substantiation Group, Nutrition and Health Program, Health and Biosecurity, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Adelaide, SA, 5000, Australia
| | - Ekavi N Georgousopoulou
- Australian National University Medical School, Australian National University, Canberra, ACT, 2605, Australia
- School of Medicine, University of Notre Dame Australia, Sydney, NSW, 2000, Australia
| | - Richard J Keegan
- Faculty of Health, University of Canberra, Canberra, ACT, 2601, Australia
- Research Institute for Sports and Exercise, University of Canberra, Canberra, ACT, 2601, Australia
| | - Andrew J McKune
- Faculty of Health, University of Canberra, Canberra, ACT, 2601, Australia
- Collaborative Research in Bioactives and Biomarkers (CRIBB) Group, University of Canberra, Bruce, ACT, 2601, Australia
- Research Institute for Sports and Exercise, University of Canberra, Canberra, ACT, 2601, Australia
- Discipline of Biokinetics, Exercise and Leisure Sciences, School of Health Sciences, University of KwaZulu-Natal, Durban, KwaZulu-Natal, 4000, South Africa
| | - Duane D Mellor
- Collaborative Research in Bioactives and Biomarkers (CRIBB) Group, University of Canberra, Bruce, ACT, 2601, Australia
- Aston Medical School, Aston University, Birmingham, B4 7ET, UK
| | - Nicola Anstice
- Faculty of Health, University of Canberra, Canberra, ACT, 2601, Australia
- Collaborative Research in Bioactives and Biomarkers (CRIBB) Group, University of Canberra, Bruce, ACT, 2601, Australia
| | - Nenad Naumovski
- Faculty of Health, University of Canberra, Canberra, ACT, 2601, Australia.
- Collaborative Research in Bioactives and Biomarkers (CRIBB) Group, University of Canberra, Bruce, ACT, 2601, Australia.
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Xu P, Su H, Jin R, Mao Y, Xu A, Cheng H, Wang Y, Meng Q. Shading Effects on Leaf Color Conversion and Biosynthesis of the Major Secondary Metabolites in the Albino Tea Cultivar "Yujinxiang". JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:2528-2538. [PMID: 32011878 DOI: 10.1021/acs.jafc.9b08212] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Albino became a novel kind of tea cultivar in China recently. In this study, transcriptome and whole-genome bisulfite sequencing (WGBS) were employed to investigate the shading effects on leaf color conversion and biosynthesis of three major secondary metabolites in the albino tea cultivar "Yujinxiang". The increased leaf chlorophyll level was likely the major cause for shaded leaf greening from young pale or yellow leaf. In comparison with the control, the total catechin level of the shading group was significantly decreased and the abundance of caffeine was markedly increased, while the theanine level was nearly not influenced. Meanwhile, differentially expressed genes (DEGs) enriched in some biological processes and pathways were identified by transcriptome analysis. Furthermore, whole-genome DNA methylation analysis revealed that the global genomic DNA methylation patterns of the shading period were remarkably altered in comparison with the control. In addition, differentially methylated regions (DMRs) and the DMR-related DEG analysis indicated that the DMR-related DEGs were the critical participants in biosynthesis of the major secondary metabolites. These findings suggest that DNA methylation is probably responsible for changes in the contents of the major secondary metabolites in Yujinxiang.
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Affiliation(s)
- Ping Xu
- Department of Tea Science , Zhejiang University , Hangzhou 310058 , People's Republic of China
| | - Hui Su
- Department of Tea Science , Zhejiang University , Hangzhou 310058 , People's Republic of China
| | - Rong Jin
- Agricultural Experiment Station , Zhejiang University , Zijingang Campus, Hangzhou , People's Republic of China
| | - Yuxiao Mao
- Hangzhou Academy of Agricultural Sciences , Hangzhou 310000 , People's Republic of China
| | - Anan Xu
- Department of Tea Science , Zhejiang University , Hangzhou 310058 , People's Republic of China
| | - Haiyan Cheng
- Department of Tea Science , Zhejiang University , Hangzhou 310058 , People's Republic of China
| | - Yuefei Wang
- Department of Tea Science , Zhejiang University , Hangzhou 310058 , People's Republic of China
| | - Qing Meng
- College of Food Science , Southwest University , Chongqing 400715 , People's Republic of China
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