Effects of black tea consumption on plasma catechins and markers of oxidative stress and inflammation in patients with coronary artery disease

Widlansky, Michael E.; Duffy, Stephen J.; Hamburg, Naomi M.; Gokce, Noyan; Warden, Beverly A.; Wiseman, Sheila A.; Keaney, John F.; Frei, Balz; Vita, Joseph A.

doi:10.1016/j.freeradbiomed.2004.11.013

Cited by 146 publications

(83 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, Duffy and colleagues observed that endotheliumdependent flow-mediated dilation of the brachial artery improved two hours after consumption of black tea and that this effect was sustained following daily consumption for four weeks in patients with proven coronary artery disease [54]. Interestingly, this favorable effect could not be related to a systemic reduction in oxidative stress as reflected by plasma antioxidant capacity or other systemic markers of oxidative stress [55]. However, it remains possible that flavonoids could have an antioxidant effect at the tissue level in the vasculature.…”

Section: Flavonoids and Endothelial Functionmentioning

confidence: 99%

Effects of Flavonoid-Containing Beverages and EGCG on Endothelial Function

Shenouda

Vita

2007

Journal of the American College of Nutrition

Self Cite

View full text Add to dashboard Cite

Abnormalities of the vascular endothelium contribute to all stages of atherosclerosis from lesion development to clinical cardiovascular disease events. Recognized risk factors, including diabetes mellitus, hypertension, dyslipidemia, cigarette smoking, and sedentary lifestyle are associated with endothelial dysfunction. A variety of pharmacological and behavioral interventions have been shown to reverse endothelial dysfunction in patients with cardiovascular disease. A large number of epidemiological studies suggest that dietary factors, including increased intake of flavonoidcontaining foods and beverages, reduce cardiovascular risk, and recent studies have shown that such beverages have favorable effects on endothelial function. These studies have engendered interest in the development of dietary supplements or drugs that would allow for more convenient and higher dose administration of flavonoids and might prove useful for prevention or treatment of cardiovascular disease. In this paper, we will review the contribution of endothelial dysfunction to the pathogenesis and clinical expression of atherosclerosis and recent data linking flavonoid and EGCG consumption to improved endothelial function and reduced cardiovascular risk.

show abstract

Section: Flavonoids and Endothelial Functionmentioning

confidence: 99%

Effects of Flavonoid-Containing Beverages and EGCG on Endothelial Function

Shenouda

Vita

2007

Journal of the American College of Nutrition

Self Cite

View full text Add to dashboard Cite

show abstract

“…Astringent taste in black tea is due to catechins, theaflavins and flavonol glycosides (Scharbert et al 2004). The regular intake of tea is associated with an improved antioxidant status in vivo that may contribute on lowering the risk of coronary heart disease, atherosclerosis, reduced mutagenicity and inflammation (Kris-Etherton & Keen 2002;Widlansky et al 2005). Recent experimental studies have recognized that tea exhibits a significant health-protecting activity due to its high polyphenol content (Manzocco et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Suggested mechanism for the effect of sweeteners on radical scavenging activity of phenolic compounds in black and green tea

Shalaby

Mahmoud

Shanab

2016

Frontiers in Life Science

View full text Add to dashboard Cite

The present work aims to evaluate the relation between the antioxidant activities and phenolic compound contents of two tea samples (green and black) mixed with or without sweeteners (sucrose or aspartame). The aqueous extracts were screened for total polyphenol and flavonoids contents. Antioxidant activities of extracts were tested using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical method and 2, 2 -azino-bis [ethylbenzthiazoline-6-sulfonic acid] (ABTS) methods using butylated hydroxyl anisole as standard compound. In addition, we identified polyphenols compounds using high performance liquid chromatography (HPLC). The results indicated that the antioxidant activity was higher against ABTS radical more than DPPH radical. Also, there is positive correlation between the antioxidant activity and phenolic compounds content presented in water extracts of tea samples. The results also indicated that addition of table sugar to green tea significantly decreased the antioxidant activity (from 95.8% to 90.6% with 4.0% sucrose). However, the same table sugar in black tea increased the antioxidant activity (from 87.0% to 91.9% with 4.0% sucrose). The analysis using HPLC showed that caffeine was the most predominant individual compounds in green and black tea without and with 1.0% sucrose (6081.8, 8772.1, 6474 and 3755 µg/100g, respectively). However, cinnamic acid showed the lowest content in the same tea samples (0.21, 0.25, 0.19 and 0.18 µg/100g respectively). Pyrogallol, catechol, epicatechin, ellagic, protocatchuic were significantly higher in green tea than in black tea. ARTICLE HISTORY

show abstract

“…Consumption of various polyphenol-rich food ingredients such as cocoa (9), green and black tea (10)(11), grape seed extract (12) and red wine extract (13) have been shown to acutely improve FMD in at-risk population groups. However, it is not known which specific polyphenolic compounds present in these foods are responsible for this beneficial effect.…”

Section: Introductionmentioning

confidence: 99%

Acute resveratrol supplementation improves flow-mediated dilatation in overweight/obese individuals with mildly elevated blood pressure

Wong

Howe

Buckley

et al. 2011

Nutrition, Metabolism and Cardiovascular Diseases

255

218

View full text Add to dashboard Cite

243Text 2129 Number of references 31 Number of figures 3Number of tables 1 and on FMD (P<0.01), which increased from 4.1 ± 0.8% (placebo) to 7.7 ± 1.5% after 270mg resveratrol. FMD was also linearly related to log10 plasma resveratrol concentration (P<0.01).(3) Conclusion-Acute resveratrol consumption increased plasma resveratrol concentrations and FMD in a dose-related manner. This effect may contribute to the purported cardiovascular health benefits of grapes and red wine.4

show abstract

Effects of black tea consumption on plasma catechins and markers of oxidative stress and inflammation in patients with coronary artery disease

Cited by 146 publications

References 42 publications

Effects of Flavonoid-Containing Beverages and EGCG on Endothelial Function

Effects of Flavonoid-Containing Beverages and EGCG on Endothelial Function

Suggested mechanism for the effect of sweeteners on radical scavenging activity of phenolic compounds in black and green tea

Acute resveratrol supplementation improves flow-mediated dilatation in overweight/obese individuals with mildly elevated blood pressure

Contact Info

Product

Resources

About