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I‐Tiao‐Gung extract through its active component daidzin improves cyclophosphamide‐induced bladder dysfunction in rat model
Author(s) -
Wu KungChieh,
Chiang BingJuin,
Tsai WenHsin,
Chung ShiuDong,
Chien ChiangTing
Publication year - 2018
Publication title -
neurourology and urodynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.918
H-Index - 90
eISSN - 1520-6777
pISSN - 0733-2467
DOI - 10.1002/nau.23815
Subject(s) - daidzin , daidzein , medicine , pharmacology , puerarin , parthenolide , agonist , endocrinology , isoflavonoid , chemistry , receptor , genistein , apoptosis , biochemistry , pathology , antioxidant , alternative medicine , flavonoid
Aims We explored the therapeutic potential of intragastric administration traditional Chinese medicine Glycine tomentella Hayata (I‐Tiao‐Gung, ITG) extract and its active component Daidzin on cyclophosphamide (CYP)‐induced cystitis and bladder hyperactivity in rats. Methods Female Wistar rats were divided into control, CYP (200 mg/kg), CYP + ITG (1.17 g/kg/day), CYP + Daidzin (12.5 mg/kg/day), and 1 week of ITG preconditioning with CYP (ITG + CYP) groups. We determined the trans cystometrogram associated with external urethral sphincter electromyogram, and the expression of M2 and M3 muscarinic and P2 × 2 and P2 × 3 purinergic receptors by Western blot in these animals. Results ITG extract contains 1.07% of Daidzin and 0.77% of Daidzein by high‐performance liquid chromatography. Daidzin was more efficient than Daidzein in scavenging H 2 O 2 activity by a chemiluminescence analyzer. CYP induced higher frequency, shorter intercontraction interval, lower maximal voiding pressure, lower threshold pressure, and Phase‐2 emptying contraction with a depressed external urethral sphincter electromyogram activity, and hemorrhagic cystitis in the bladders. The altered parameters by CYP were significantly improved in CYP + ITG, CYP + Daidzin, and ITG + CYP groups. The P2 × 2 and P2 × 3 expressions were significantly upregulated in CYP group, but were depressed in CYP + ITG, CYP + Daidzin, and ITG + CYP groups. The M2 expression was not significantly different among these five groups. The M3 expression was significantly upregulated in CYP group, but was significantly depressed in CYP + ITG, CYP + Daidzin, and ITG + CYP groups. Conclusions These data suggest that ITG extract through its active component Daidzin effectively improved CYP‐induced cystitis by the action of restoring Phase 2 activity and inhibiting the expressions of P2 × 2, P2 × 3, and M3 receptors.