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<p>Nocturnal polyuria is a major cause of nocturia, which affects quality of life. Aging-related decreases in nitric oxide production have been reported to contribute to salt-induced nocturnal polyuria. We posited that enhanced nitric oxide production from exercise could mitigate salt-induced nocturnal polyuria. To validate, we assessed the impact of 4 weeks of moderate-intensity exercise on intrarenal renin-angiotensin system activity and salt-induced polyuria during inactive periods in 80-week-old mice. The moderate-intensity exercise group (Mod-Ex) had increased nitric oxide production and suppressed intrarenal renin-angiotensin system compared to the sedentary group (Sed) (renal angiotensinogen level: Sed vs. Mod-Ex, 1.101 ± 0.077 vs. 0.630 ± 0.048 arbitrary unit, <i>P</i> = 0.002). This exercise also alleviated salt-induced polyuria during inactive periods (diurnal polyuria index: Sed vs. Mod-Ex, 0.292 ± 0.027 vs. 0.193 ± 0.023, <i>P</i> = 0.018). These effects were neutralized by suppression of nitric oxide production by oral administration of N<sup>ω</sup>-Nitro-L-arginine methyl ester hydrochloride, an nitric oxide synthesis inhibitor. These findings indicate that exercise-induced improvements in salt-induced polyuria during inactive periods are caused by increases in nitric oxide production. In summary, increasing nitric oxide production may serve as a treatment method for salt-induced nocturnal polyuria in older adults.</p>

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Decreased nitric oxide production is a novel therapeutic target for salt-induced nocturnal polyuria in aging

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月28日

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  • Takahiro Imanaka,
  • Kentaro Takezawa,
  • Yuma Kujime,
  • Hiroaki Kitakaze,
  • Go Tsujimura,
  • Sohei Kuribayashi,
  • Yosuke Sekii,
  • Norichika Ueda,
  • Shinichiro Fukuhara,
  • Hiroshi Kiuchi,
  • Hiromitsu Negoro,
  • Norio Nonomura

摘要

Nocturnal polyuria is a major cause of nocturia, which affects quality of life. Aging-related decreases in nitric oxide production have been reported to contribute to salt-induced nocturnal polyuria. We posited that enhanced nitric oxide production from exercise could mitigate salt-induced nocturnal polyuria. To validate, we assessed the impact of 4 weeks of moderate-intensity exercise on intrarenal renin-angiotensin system activity and salt-induced polyuria during inactive periods in 80-week-old mice. The moderate-intensity exercise group (Mod-Ex) had increased nitric oxide production and suppressed intrarenal renin-angiotensin system compared to the sedentary group (Sed) (renal angiotensinogen level: Sed vs. Mod-Ex, 1.101 ± 0.077 vs. 0.630 ± 0.048 arbitrary unit, P = 0.002). This exercise also alleviated salt-induced polyuria during inactive periods (diurnal polyuria index: Sed vs. Mod-Ex, 0.292 ± 0.027 vs. 0.193 ± 0.023, P = 0.018). These effects were neutralized by suppression of nitric oxide production by oral administration of Nω-Nitro-L-arginine methyl ester hydrochloride, an nitric oxide synthesis inhibitor. These findings indicate that exercise-induced improvements in salt-induced polyuria during inactive periods are caused by increases in nitric oxide production. In summary, increasing nitric oxide production may serve as a treatment method for salt-induced nocturnal polyuria in older adults.