Kyle J. Norton
Green tea, a precious drink processes a number of health benefits known to almost everyone in Asia and the Western world. However, as yin in nature herbal medicine or food, long-term injection of large amounts may obstruct the balance of yin-yang, inducing "excessive yin syndrome" or "yang vacuity syndrome" including weakened immunity and painful case of GERD,... according to traditional Chinese medicine's Yin-Yang theory.
Kidney cancer is a medical condition characterized by irregular cell growth in the issues of the kidney. At the later stage, the cancerous cell may travel a distance away to invade other healthy tissues and organs.
According to statistics, kidney cancer is uncommon in people younger than age 45 and among the 10 most common cancers in both genders.
Investigation of green tea's effect on the risk of renal cancer was found to associate with different implications involving a number of mechanisms, mainly, in green tea's bioactive components.
According to the evaluated 250 newly diagnosed, histologically confirmed Clear cell renal cell carcinoma (CCRCC) cases and 299 sex-, age-matched healthy controls provided complete information by the face-to-face interview in Shanghai between 2007 and 2009, application of green tea at the dose of ≥500 ml/d demonstrated a significant inverse association to risk of CCRCC.
Indeed, green tea consumption of lower than the said volume such as 8 oz (237 ml) or more cups/day was also associated to decrease renal cell cancer risk, compared to non-drinkers, according to the report of Brigham and Women's Hospital and Harvard Medical School.
Further analysis also found that interactions with the environmental exposures association with polymorphisms of the xenobiotic-metabolizing enzymes in induced CCRCC risk, also inhibited by green tea extract through increasing serum and liver antioxidant capacity and strengthening the stability of microsomal and lysosomal membranes of healthy cells in compared to control.
In a free radical aspect, the examined Wistar rats induced renal cancer pre-treated with N-ethyl-N-hydroxyethylnitrosamine (EHEN) by oral injection of drinking water for 2 weeks, also found that administration of green tea extract catechin ( 0.1% polyphenon-60) over 30 weeks of period of treatment exhibits a significant effect in decreasing the incidence of renal cell tumors greater than 3 mm in diameter but not tumors that are less than 3 mm in diameter, through overexpression of antioxidant in suppression of reactive oxygen species (ROS) induced by N-ethyl-N-hydroxyethylnitrosamine (EHEN) pre-treatment.
Importantly, in alternated gene expression in increased prevalence of cancer in human subjects,
application of green tea polyphenol, catechins have been reported to reverse change of DNA methylation in contributing to the tumor repressive gene of RGS2 (regulator of G-protein signaling 2) in modulated expression of cancers and increased the regulation of conversion of DNA to RNA (transcription) of these genes in ameliorated risk of renal and other cancer(s).
Furthermore, the application of the combination of green tea extract bioactive catechins and epigallocatechin gallate also showed to modulate DNA methylation by attenuating the effect of DNA methyltransferase 1 (DNMT1) to ensure the fidelity of replication of inherited epigenetic patterns.
Aberrant DNA methylation patterns are associated with increased prevalence of renal and other tumor(s).
Taken together, Green Tea and its polyphenols bioactive compound catechins and epigallocatechin gallate may have a potential and therapeutic effect in reduced risk and treatment of renal cancer through antioxidants and anti-gene alternative activities.
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Author Biography
Kyle J. Norton (Scholar, Master of Nutrients, All right reserved)
Health article writer and researcher; Over 10.000 articles and research papers have been written and published online, including worldwide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the Karate GB Daily, etc.,.
Named TOP 50 MEDICAL ESSAYS FOR ARTISTS & AUTHORS TO READ by Disilgold.com Named 50 of the best health Tweeters Canada - Huffington Post
Nominated for shorty award over last 4 years
Some articles have been used as references in medical research, such as international journal Pharma and Bio Science, ISSN 0975-6299.
Sources
(1) Risk factor for clear cell renal cell carcinoma in Chinese population: a case-control study by Wang G1, Hou J, Ma L, Xie J, Yin J, Xu D, Chang W, Tan X, Su T, Zhang H, Cao G.(PubMed)
(2) [Effects of green tea extract and its components on antioxidant status and activities of xenobiotic metabolizing enzymes of rats] by [Article in Russian](PubMed)
Kravchenko LV, Trusov NV, Aksenov IV, Avren'eva LI, Guseva GV, Lashneva NV, Tutel'ian VA.
(3) Intakes of coffee, tea, milk, soda, and juice and renal cell cancer in a pooled analysis of 13 prospective studies byLee JE1, Hunter DJ, Spiegelman D, Adami HO, Bernstein L, van den Brandt PA, Buring JE, Cho E, English D, Folsom AR, Freudenheim JL, Gile GG, Giovannucci E, Horn-Ross PL, Leitzmann M, Marshall JR, Männistö S, McCullough ML, Miller AB, Parker AS, Pietinen P, Rod riguez C, Rohan TE, Schatzkin A, Schouten LJ, Willett WC, Wolk A, Zhang SM, Smith-Warner SA. (PubMed)
(4) Effect of polyphenon-60 on the development of renal cell tumors in rats treated with N-ethyl-N hydroxyethyl nitrosamine by Yoshioka N1, Hiasa Y, Cho M, Kitahori Y, Hirao K, Konishi N, Kuwashima S.(PubMed)
(5) Targeting DNA Methylation with Green Tea Catechins by Yiannakopoulou E.C.(Karger)
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