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- W2013221408 abstract "Epigallocatechin gallate (EGCG) has exhibited antitumor properties against bladder cancer. However, its effects in interstitial cystitis (IC) have not been investigated.Here, we performed repeated cystoscopy and re-biopsy of bladder mucosa before and after intravesical irrigation of EGCG in eight patients diagnosed with IC based on clinical and histopathologic assessments. Six normal bladder tissue samples were obtained from age-, race-, and sex-matched asymptomatic control subjects. IC symptom index was used to compare the therapeutic effect in IC patients. Patient-derived bladder epithelial cells were cultured and cell stretch experiments and ATP assays were performed. The expression of purinergic receptors X1, X2, and X3, and Y1, Y2, and Y11, in biopsied samples was detected by Western blotting and real-time polymerase chain reaction, respectively. Moreover, the expression of inducible NO synthase, phosphorylated Akt, and phosphorylated NF-κB was also assessed.All EGCG-treated patients demonstrated different extents of remission of symptoms. We found a significant upregulation in P2X1, P2X2, and P2X3 receptor proteins and P2Y1, P2Y2, and P2Y11 receptor transcripts in IC patients. However, EGCG therapy attenuated the expression of all purinergic receptors. In addition, EGCG demonstrated prominent antioxidative and antiinflammatory effects via inhibition of the upregulation of iNOS and phosphorylated NF-κB. Furthermore, the stretch-activated release of ATP in cultured bladder urothelial cells was greater in cells derived from IC patients, compared with those from the control patients, but EGCG, at all concentrations tested, effectively abolished the increase in ATP release from stretched IC patient-derived cells.Our study suggests that inhibition of the expression of purinergic receptors and ATP release in urothelial cells by EGCG supports further development of EGCG as a novel therapeutic option for IC." @default.
- W2013221408 created "2016-06-24" @default.
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- W2013221408 date "2013-07-01" @default.
- W2013221408 modified "2023-09-28" @default.
- W2013221408 title "Epigallocatechin gallate attenuates interstitial cystitis in human bladder urothelium cells by modulating purinergic receptors" @default.
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- W2013221408 doi "https://doi.org/10.1016/j.jss.2012.11.041" @default.
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