Abstract
Objective
Green tea proposes anti-inflammatory properties which may attenuate chronic inflammation-induced fibrosis of vessels. This study evaluated whether green tea polyphenols (GTP) can avert fibrosis or vascular disruption along with mechanisms in rats with chronic inflammation.
Treatments
Forty 3-month-old female rats were assigned to a 2 (placebo vs. lipopolysaccharide, administration) × 2 (no GTP vs. 0.5% GTP in drinking water) factorial design for 12 weeks.
Methods
Masson’s trichrome staining evaluated myocardial fibrosis in coronary vessels and surrounding myocardium. Whole blood specimens were counted for differentials. Spleen tumor necrosis factor-α (TNF-α) mRNA expression was determined by real-time RT–PCR. Data were analyzed by two-way analysis of variance (ANOVA) followed by mean separation procedures.
Results
After 12 weeks, lipopolysaccharide administration induced myocardial fibrosis in vessels and surrounding myocardium, spleen TNF-α mRNA expression, and leukocytes, while GTP supplementation in drinking water significantly averted such observation.
Conclusions
GTP attenuates myocardial fibrosis through a suppression of chronic inflammation and innate immune responses.
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References
Pedersen BK. The anti-inflammatory effect of exercise: its role in diabetes and cardiovascular disease control. Essays Biochem. 2006;42:105–17.
Laurat E, Poirier B, Tupin E, Caligiuri G, Hansson GK, Bariéty J, Nicoletti. In vivo downregulation of T helper cell 1 immune responses reduces atherogenesis in apolipoprotein E-knockout mice. Circulation. 2001;104:197–202.
Regensteiner JG, Hiatt WR. Current medical therapies for patients with peripheral arterial disease: a critical review. Am J Med. 2002;112:49–57.
Tang J, Raines EW. Are suppressors of cytokine signaling proteins recently identified in atherosclerosis possible therapeutic targets? Trends Cardiovasc Med. 2005;15:243–9.
Kuriyama S, Shimazu T, Ohmori K, Kikuchi N, Nakaya N, Nishino Y, Tsubono Y, Tsuji I. Green tea consumption and mortality due to cardiovascular disease, cancer, and all causes in Japan. JAMA. 2006;296(10):1255–65.
Stangl V, Dreger H, Stangl K, Lorenz M. Molecular targets of tea polyphenols in the cardiovascular system. Cardiovasc Res. 2007;73(2):348–58.
Sueoka N, Suganuma M, Sueoka E, Okabe S, Matsuyama S, Imai K, Nakachi K, Fujiki H. A new function of green tea: prevention of lifestyle-related diseases. Ann N Y Acad Sci. 2001;928:274–80. Review.
Moore RJ, Jackson KG, Minihane AM. Green tea (Camellia sinensis) catechins and vascular function. Br J Nutr. 2009;102(120):1790–802.
Mineharu Y, Koizumi A, Wada Y, Iso H, Watanabe Y, Date C, Yamamoto A, Kikuchi S, Inaba Y, Toyoshima H, Kondo T, Tamakoshi A, and the JACC study group. Coffee, green tea, black tea and oolong tea consumption and risk of mortality from cardiovascular disease in Japanese men and women. J Epidemiol Community Health 2010. (Epub ahead of print).
Suganuma M, Sueoka E, Sueoka N, Okabe S, Fujiki H. Mechanisms of cancer prevention by tea polyphenols based on inhibition of TNF-alpha expression. Biofactors. 2000;13(1–4):67–72.
Shen CL, Yeh JK, Samathanam C, Cao JJ, Stoecker BJ, Dagda RY, Chyu MC, Dunn DM, Wang JS. Green tea polyphenols attenuate deterioration of bone microarchitecture in female rats with systemic chronic inflammation. Osteoporos Int 2010. (Epub ahead of print).
Wang JS, Luo H, Wang P, Tang L, Yu J, Huang T, Cox S, Gao W. Validation of green tea polyphenol biomarkers in a phase II human intervention trial. Food Chem Toxicol. 2008;46(1):232–40.
Shen CL, Yeh JK, Cao JJ, Tatum OL, Dagda RY, Wang JS. Green tea polyphenols mitigate bone loss of female rats in a chronic inflammation-induced bone loss model. J Nutr Biochem. 2010;21(10):968–74.
Shen CL, Wang P, Guerrieri J, Yeh JK, Wang JS. Protective effect of green tea polyphenols on bone loss in middle-aged female rats. Osteoporos Int. 2008;19(7):979–90.
Smith BJ, Lerner MR, Bu SY, Lucas EA, Hanas JS, Lightfoot SA, Postier RG, Bronze MS, Brackett DJ. Systemic bone loss and induction of coronary vessel disease in a rat model of chronic inflammation. Bone. 2006;38(3):378–86.
Hori M, Nishida K. Oxidative stress and left ventricular remodelling after myocardial infarction. Cardiovasc Res 2009;81(3):457–64. (Review).
Li R, Huang YG, Fang D, Le WD. (−)-Epigallocatechin gallate inhibits lipopolysaccharide-induced microglial activation and protects against inflammation-mediated dopaminergic neuronal injury. J Neurosci Res. 2004;78(5):723–31.
He P, Noda Y, Sugiyama K. Green tea suppresses lipopolysaccharide-induced liver injury in d-galactosamine-sensitized rats. J Nutr. 2001;131(5):1560–7.
Hong Byun E, Fujimura Y, Yamada K, Tachibana H. TLR4 signaling inhibitory pathway induced by green tea polyphenol epigallocatechin-3-gallate through 67-kDa laminin receptor. J Immunol. 2010;185(1):33–45.
Koeberle A, Bauer J, Verhoff M, Hoffmann M, Northoff H. Werz O. Green tea epigallocatechin-3-gallate inhibits microsomal prostaglandin E(2) synthase-1. Biochem Biophys Res Commun. 2009;388(2):350–4.
Smith BJ, Lightfoot SA, Lerner MR, Denson KD, Morgan DL, Hanas JS, Bronze MS, Postier RG, Brackett DJ. Induction of cardiovascular pathology in a novel model of low-grade chronic inflammation. Cardiovasc Pathol. 2009;18(1):1–10.
Ramesh E, Geraldine P, Thomas PA. Regulatory effect of epigallocatechin gallate on the expression of C-reactive protein and other inflammation markers in an experimental model of atherosclerosis. Chem Biol Interact. 2010;183(1):125–32.
Kim IB, Kim DY, Lee SJ, Sun MJ, Lee MS, Li H, Cho JJ, Park CS. Inhibition of IL-8 production by green tea polyphenols in human nasal fibroblasts and A549 epithelial cells. Bio Pharm Bull. 2006;29(6):1120–5.
Dona M, Dell’Aica I, Calabrese F, Benelli R, Morini M, Albini A, Garbisa S. Neutrophil restraint by green tea: inhibition of inflammation associated angiogenesis and pulmonary fibrosis. J Immunol. 2003;170(8):4335–41.
Hofbauer R, Frass M, Gmeiner B, Handler S, Speiser W, Kapiotis S. The green tea extract epigallocatechin gallate is able to reduce neutrophil transmigration through monolayers of endothelial cells. Wien Klin Wochenschr. 1999;111(7):278–82.
Ludwig A, Lorenz M, Grimbo N, Steinle F, Meiners S, Bartsch C, Stangl K, Baumann G, Stangl V. The tea flavonoid epigallocatechin-3-gallate reduces cytokine-induced VCAM-1 expression and monocyte adhesion to endothelial cells. Biochem Biophys Res Commun. 2004;316(3):659–65.
Chen HI, Hsieh SY, Yang FL, Hsu YH, Lin CC. Exercise training attenuates septic responses in conscious rats. Med Sci Sports Exerc. 2007;39(3):435–42.
Liese AM, Siddiqi MQ, Siegel JH, Denny T, Spolarics Z. Augmented TNF-alpha and IL-10 production by primed human monocytes following interaction with oxidatively modified autologous erythrocytes. J Leukoc Biol. 2001;70(2):289–96.
Starzyk D, Korbut R, Grygelwski RJ. The role of nitric oxide in regulation of deformability of red blood cells in acute phase of endotoxaemia in rats. J Physiol Pharmacol. 1997;48(4):731–5.
Cheng HC, Chan CM, Tsay HS, Liang HJ, Liang YC, Liu DZ. Improving effects of epigallocatechin-3-gallate on hemorheological abnormalities of aging guinea pigs. Circ J. 2007;71(4):597–603.
Droke EA, Hager KA, Lerner MR, Lightfoot SA, Stoecker BJ, Brackett DJ, Smith BJ. Soy isoflavones avert chronic inflammation-induced bone loss and vascular disease. J Inflamm (Lond). 2007;4:17.
Acknowledgments
This work was supported by the Laura W. Bush Institute for Women’s Health (CLS). We thank Raul Y. Dagda for the technical assistance in assessing mRNA expression of TNF-α.
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Responsible Editor: Graham Wallace.
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Shen, CL., Samathanam, C., Tatum, O.L. et al. Green tea polyphenols avert chronic inflammation-induced myocardial fibrosis of female rats. Inflamm. Res. 60, 665–672 (2011). https://doi.org/10.1007/s00011-011-0320-y
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DOI: https://doi.org/10.1007/s00011-011-0320-y