Different effects of GsMTx4 on nocturia associated with the circadian clock and Piezo1 expression in mice

LIFE SCIENCES

卷:278

Article

Ihara, Tatsuya¹  Mitsui, Takahiko¹  Shimura, Hiroshi¹  Tsuchiya, Sachiko¹  Kanda, Mie¹  Kira, Satoru¹  Nakagomi, Hiroshi¹  Sawada, Norifumi¹  Kamiyama, Manabu¹  Shigetomi, Eiji²  Shinozaki, Yoichi²  Koizumi, Schuichi²  Takeda, Masayuki¹ 

[1] Univ Yamanashi, Interdisciplinary Grad Sch Med, Dept Urol, Chuo, Yamanashi, Japan

[2] Univ Yamanashi, Interdisciplinary Grad Sch Med, Dept Neuropharmacol, Chuo, Yamanashi, Japan

关键词: Piezo1;    Nocturia;    GsMTx4;   

DOI  :  10.1016/j.lfs.2021.119555

来源: Elsevier

【 摘 要 】

Objectives: Nocturia is a major problem in geriatric patients. Clock genes regulate circadian bladder function and Piezo type mechanosensitive ion channel component 1 (Piezo1) that senses bladder fullness. We utilized WT and Clock mutant (Clock(Delta 19/Delta 19): nocturia phenotype) mice to determine if the effects of GsMTx4, a Piezo1 inhibitor, is dependent on circadian Piezo1 expression in the bladder. Methods: We compared voiding behavior in mice after the administration of vehicle, low dose, or high dose of GsMTx4. Intraperitoneal injections (IP) were performed at Zeitgeber time (ZT) 0, lower Piezo1 expression phase (ZT0-IP) and ZT12, higher Piezo1 expression phase (ZT12-IP). Urine volume (Uvol), voiding frequency (VF), and urine volume per void (Uvol/v) were measured using metabolic cages. Results: VF decreased at ZT12-IP in WT mice only with high dose of GsMTx4 but showed no effects in Clock(Delta 19/Delta 19) mice. VF decreased significantly at ZT0-IP in WT mice after both doses, but only decreased after high dose in Clock(Delta 19/Delta 19) mice. Uvol/v increased in WT mice at ZT0-IP after both doses and at ZT12-IP after high dose. Uvol/v increased in Clock(Delta 19/Delta 19) mice only at ZT0-IP after high dose. GsMTx4 did not affect Uvol in both mice at ZT12-IP. A decrease in Uvol was observed in both mice at ZT0-IP; however, it was unrelated to GsMTx4-IP. Conclusions: The effects of GsMTx4 changed associated with the circadian clock and Piezo1 expression level. The maximum effect occurred during sleep phase in WT. These results may lead to new therapeutic strategies against nocturia.

【 授权许可】

Free