Kyle J. Norton
Green tea exhibited anti-inflammatory effect in reduced symptoms and progression of rheumatoid Arthritis, a renowned institute study suggested
Rheumatoid Arthritis is a chronic disorder as a result of inflammation, affecting mostly the flexible (synovial) joints and tissues, and organs in the body after the age of 40 and causing the diminished quality of life of many elders.
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, induced "yin excessive syndrome" or "yang vacuity syndrome" including dizziness, low energy, weaken immunity, and painful case of GERD,... according to traditional Chinese medicine's Yin-Yang theory.
According to a joint study led by Washington State University College of Pharmacy, green tea (EGCG, EGC, and EC) showed to ameliorate the expression of pro-inflammatory mediators including (IL-6 and IL-8) and Cox-2 in primary human rheumatoid arthritis synovial fibroblasts (RASFs), through the effects of its phytochemical compounds of EGCG and EGC antioxidant activities.
Dr. Fechtner S, the lead researcher said," EGCG is the most effective catechin at inhibiting downstream inflammatory signaling, its effectiveness could be hindered by the presence of (epicatechin) EC".
In the investigation of the anti-inflammatory activity of green versus black tea aqueous extract in a rat model with orally/daily distilled water as the placebo, indomethacin (1.0 mg/kg body weight; a non-steroidal/anti-inflammatory drug), or tea aqueous extracts (for 28 or 14 consecutive days administrated from day 0 or 14 of arthritis induction, respectively), group treated with a high dose of GTE (from day 0) significantly alleviated (P < 0.05-0.001) the progression and all complications induced by rheumatoid arthritis in compared placebo.
More importantly, Researchers also found that the expression of the anti-arthritic activity of the high dose of GTE (from day 0) mediated by significantly decreasing the systemic production of pro-inflammatory cytokines and the expression of chemokine receptor-5, a protein in activated immune activities in the in synovial tissues, was comparable (P > 0.05) with that of indomethacin (12.9-53.8 vs. 9.5-48.4%, respectively).
Furthermore, the anti-arthritic potency of tea aqueous extracts was dosed dependent on the order of a high dose of GTE > low dose of GTE ≥ high dose of BTE > low dose of BTE.
Other study suggested that green tea extract in reduced symptoms and risk of complication probably are the result in regulating chemokine(a family of cytokines secreted by cells) production in an immune reaction and chemokine receptor expression in interaction with proinflammatory cytokines of human RA synovial fibroblasts in rat adjuvant-induced arthritis (AIA).
Taken together, green tea may be served as a functional food to reduce symptoms and risk of complications for patients with rheumatoid arthritis.
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Sources
(1) Molecular insights into the differences in anti-inflammatory activities of green tea catechins on IL-1β signaling in rheumatoid arthritis synovial fibroblasts by Fechtner S1, Singh A1, Chourasia M2, Ahmed S3.(PubMed)
(2) Anti-inflammatory activity of green versus black tea aqueous extract in a rat model of human rheumatoid arthritis by Ramadan G1, El-Beih NM1, Talaat RM2, Abd El-Ghffar EA1.(PubMed)
(3) Green tea extract inhibits chemokine production, but up-regulates chemokine receptor expression, in rheumatoid arthritis synovial fibroblasts and rat adjuvant-induced arthritis by Marotte H1, Ruth JH, Campbell PL, Koch AE, Ahmed S.(PubMed)
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