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Does water channel protein aquaporin play key roles in water reabsorption from the bladder?

Research Project

Project/Area Number 17H04326
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Urology
Research InstitutionUniversity of Fukui

Principal Investigator

Yokoyama Osamu  福井大学, 学術研究院医学系部門, 教授 (90242552)

Co-Investigator(Kenkyū-buntansha) 伊藤 秀明  福井大学, 学術研究院医学系部門, 准教授 (00345620)
小林 基弘  福井大学, 学術研究院医学系部門, 教授 (00362137)
青木 芳隆  福井大学, 学術研究院医学系部門(附属病院部), 講師 (30273006)
山内 寛喜  福井大学, 学術研究院医学系部門, 特別研究員 (40464086)
松田 陽介  福井大学, 学術研究院医学系部門(附属病院部), 講師 (90345687)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2019: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Keywords夜間頻尿 / 多尿 / 抗コリン薬 / アクアポリン / 膀胱 / 腎 / 夜間多尿 / アクアポリン分子 / 水 / ラット / 膀胱吸収 / 睡眠薬 / 膀胱知覚神経
Outline of Final Research Achievements

Clinical research and basic experiments in our laboratory have revealed that anticholinergics reduce urine output at night. Recent reports suggested a mechanism of urine absorption through the bladder epithelium, but at most about 10% of the infused volume. In the present study, bladder absorption rate depended on the intravesical pressure and the infused volume, furthermore, the anticholinergics was not involved in bladder absorption mechanisms. Next, an experimental system was constructed to measure the amount of urine directly from the ureter after intravenous administration of physiological saline to make rats a diuretic state. The anticholinergics suppressed renal urine production, and the higher the dose, the stronger the antidiuretic effect. Water reabsorption by AQP2 molecules was speculated by elevated urinary sodium concentration. Immunostaining of the renal collecting duct was performed using an antibody against AQP2, and it was confirmed that AQP2 was indeed expressed.

Academic Significance and Societal Importance of the Research Achievements

夜間1回以上トイレに行く人は全国で4500万人を越える。夜間頻尿の原因で難治とされるのが夜間多尿であるが、過活動膀胱治療薬である抗コリン薬や睡眠薬が多尿を改善させることを報告してきた。ではその機序は何か。近年、尿は膀胱から吸収されるとの報告があるが、今回の実験では吸収量は注入量の高々10%程度であり、注入圧や量に依存して抗コリン薬は関与しなかった。膀胱吸収の影響を除外するため尿管から直接尿量を測定すると抗コリン薬は腎尿量を減少させることが解った。尿中のNa濃度は上昇しており、腎アクアポリン分子を介して尿量減少させる可能性が示唆された。この結果は夜間多尿の新たな治療戦略を提供すると考えられる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (33 results)

All 2020 2019 2018 2017

All Journal Article (15 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 15 results,  Open Access: 6 results,  Acknowledgement Compliant: 1 results) Presentation (18 results) (of which Int'l Joint Research: 16 results,  Invited: 3 results)

  • [Journal Article] Efficacy of vibegron, a novel β3-adrenoreceptor agonist, on severe urgency urinary incontinence related to overactive bladder: post hoc analysis of a randomized, placebo-controlled, double-blind, comparative phase 3 study.2020

    • Author(s)
      Yoshida M, Takeda M, Gotoh M, Yokoyama O, Kakizaki H, Takahashi S, Masumori N, Nagai S, Minemura K.
    • Journal Title

      BJU Int.

      Volume: 125 Issue: 5 Pages: 709-717

    • DOI

      10.1111/bju.15020

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] OnabotulinumtoxinA (botulinum toxin type A) for the treatment of Japanese patients with overactive bladder and urinary incontinence: Results of single-dose treatment from a phase III, randomized, double-blind, placebo-controlled trial (interim analysis).2020

    • Author(s)
      Yokoyama O, Honda M, Yamanishi T, Sekiguchi Y, Fujii K, Nakayama T, Mogi T.
    • Journal Title

      Int J Urol

      Volume: 27 Issue: 3 Pages: 227-234

    • DOI

      10.1111/iju.14176

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Low and high body mass index values are associated with female nocturia.2019

    • Author(s)
      Ito H, Aoki Y, Oe H, Taga M, Tsuchiyama K, Yokoyama O.
    • Journal Title

      Neurourol Urodyn

      Volume: 38 Issue: 8 Pages: 2250-2254

    • DOI

      10.1002/nau.24126

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] α1 -Blocker inhibits non-voiding contractions and decreases the level of intravesical prostaglandin E2 in rats with partial bladder outlet obstruction.2019

    • Author(s)
      Akino H, Ito H, Nagase K, Matsuta Y, Aoki Y, Hattori T, Yokoyama O.
    • Journal Title

      Int J Urol.

      Volume: 26 Issue: 9 Pages: 924-930

    • DOI

      10.1111/iju.14069

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Role of corticotropin-releasing factor on bladder function in rats with psychological stress.2019

    • Author(s)
      Seki M, Zha XM, Inamura S, Taga M, Matsuta Y, Aoki Y, Ito H, Yokoyama O.
    • Journal Title

      Sci Rep.

      Volume: 9 Issue: 1 Pages: 9828-9828

    • DOI

      10.1038/s41598-019-46267-9

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Serum C-reactive protein level is not associated with prostatic inflammation but with overactive detrusor in patients with benign prostatic hyperplasia.2019

    • Author(s)
      Inamura S, Ito H, Shinagawa T, Tsutsumiuchi M, Taga M, Tsuchiyama K, Kobayashi M, Yokoyama O.
    • Journal Title

      Neurourol Urodyn.

      Volume: 38 Issue: 6 Pages: 1728-1736

    • DOI

      10.1002/nau.24051

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Efficacy of novel β3 -adrenoreceptor agonist vibegron on nocturia in patients with overactive bladder: A post-hoc analysis of a randomized, double-blind, placebo-controlled phase 3 study.2019

    • Author(s)
      Yoshida M, Takeda M, Gotoh M, Yokoyama O, Kakizaki H, Takahashi S, Masumori N, Nagai S, Hashimoto K, Minemura K
    • Journal Title

      Int J Urol

      Volume: 26 Issue: 3 Pages: 369-375

    • DOI

      10.1111/iju.13877

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Long-term safety and efficacy of antimuscarinic add-on therapy in patients with overactive bladder who had a suboptimal response to mirabegron monotherapy: A multicenter, randomized study in Japan (MILAI II study).2019

    • Author(s)
      Yamaguchi O, Kakizaki H, Homma Y, Igawa Y, Takeda M, Nishizawa O, Gotoh M, Yoshida M, Yokoyama O, Seki N, Okitsu A, Hamada T, Kobayashi A, Kuroishi K.
    • Journal Title

      Int J Urol

      Volume: 26 Issue: 3 Pages: 342-352

    • DOI

      10.1111/iju.13868

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Therapeutic effect of propiverine hydrochloride on mixed-type urinary incontinence in women: The Female Urgency and Stress Urinary Incontinence Study of Propiverine Hydrochloride trial.2018

    • Author(s)
      3.Minagawa T, Gotoh M, Yokoyama O, Sugaya K, Yamanishi T, Kawahara K, Kaga K, Kikuchi T, Nishizawa O
    • Journal Title

      Int J Urol.

      Volume: 25 Issue: 5 Pages: 486-491

    • DOI

      10.1111/iju.13553

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Prostatic stromal inflammation is associated with bladder outlet obstruction in patients with benign prostatic hyperplasia.2018

    • Author(s)
      .Inamura S, Ito H, Shinagawa T, Tsutsumiuchi M, Taga M, Kobayashi M, Yokoyama O
    • Journal Title

      Prostate

      Volume: 78 Issue: 10 Pages: 743-752

    • DOI

      10.1002/pros.23518

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nationwide Japanese Prostate Cancer Outcome Study of Permanent Iodine-125 Seed Implantation (J-POPS): first analysis on survival2018

    • Author(s)
      Ito H, Wang D, Zha X, Inamura S, Seki M, Taga M, Yokoyama O.
    • Journal Title

      Life Sci.

      Volume: 23 Issue: 6 Pages: 1148

    • DOI

      10.1007/s10147-018-1309-0

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nerve growth factor release from the urothelium increases via activation of bladder C-fiber in rats with cerebral infarction2017

    • Author(s)
      R.Yokokawa, H.Akino, H.Ito, X.Zha, O.Yokoyama
    • Journal Title

      Neurourol Urodyn

      Volume: 36 Issue: 6 Pages: 1448-1455

    • DOI

      10.1002/nau.23142

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Safety and efficacy of the combination of once-daily tadalafil and alpha-1 blocker in Japanese men with lower urinary tract symptoms suggestive of benign prostatic hyperplasia: A randomized, placebo-controlled, cross-over study2017

    • Author(s)
      M.Takeda, O.Yokoyama, M.Yoshida, O.Nishizawa, K.Hirata, R.Nakaoka, Y.Takita, M.Murakami
    • Journal Title

      Int J Urol

      Volume: 24 Issue: 7 Pages: 539-547

    • DOI

      10.1111/iju.13357

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Appearance of high endothelial venule-like vessels in benign prostatic hyperplasia is associated with lower urinary tract symptom2017

    • Author(s)
      Inamura S, Shinagawa T, Hoshino H, Sakai Y, Imamura Y, Yokoyama O, Kobayashi M
    • Journal Title

      Prostate

      Volume: 77 Issue: 7 Pages: 794-802

    • DOI

      10.1002/pros.23319

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Nocturnal polyuria and hypertension in patients with lifestyle related diseases and overactive bladder2017

    • Author(s)
      O.Yokoyama, O.Nishizawa, Y.Homma, M.Takeda, M.Gotoh, H.Kakizaki, H.Akino, K.Hayashi, K.Yonemoto; OASIS project group
    • Journal Title

      J Urol

      Volume: 197 Issue: 2 Pages: 423-431

    • DOI

      10.1016/j.juro.2016.08.087

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] Smoking Exacerbates Lower Urinary Tract Symptoms and Chronic Prostatic Inflammation in Patients with Benign Prostatic Hyperplasia.2019

    • Author(s)
      Inamura S, Kobayashi H, Tanio M, Tsutsumiuchi M, Taga M, Tsuchiyama K, Matsuta Y, Aoki Y, Ito H, Yokoyama O
    • Organizer
      39th Congress of the Societe Internationale d'Urologie (SIU)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Role of Corticotropin-Releasing Factor on Bladder Function in Rats with Psychological Stress2019

    • Author(s)
      Seki M, Zha XM, Inamura S, Taga M, Matsuta Y, Aoki Y, Ito H, Yokoyama O
    • Organizer
      39th Congress of the Societe Internationale d'Urologie (SIU)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] An alpha 1-blocker inhibits non-voiding contractions and decreases the level of intravesical prostaglandin E2 in rats with partial bladder outlet obstruction2019

    • Author(s)
      Akino H, Ito H, Nagase K, Hattori T, Yokoyama O
    • Organizer
      ICS 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Smoking exacerbates lower urinary tract symptoms and chronic prostatic inflammation in patients with benign prostatic hyperplasia.2019

    • Author(s)
      Inamura S, Kobayashi H, Tanio M, Tsutsumiuchi M, Taga M, Tsuchiyama K, Matsuta Y, Aoki Y, Ito H, Yokoyama O
    • Organizer
      ICS 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Postoperative clinical parameters of patients with strong chronic prostatic inflammation in transurethral BPH surgery improved more than those without such inflammation.2019

    • Author(s)
      Inamura S, Kobayashi H, Tanio M, Tsutsumiuchi M, Taga M, Tsuchiyama K, Matsuta Y, Aoki Y, Ito H, Yokoyama O
    • Organizer
      ICS 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Silodosin-The Differential Effects of A Uro-selective Alpha Blocker2019

    • Author(s)
      Yokoyama O
    • Organizer
      JUA2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] What is the clinical significance of nocturia and why we need to knouw about it?2019

    • Author(s)
      Yokoyama O
    • Organizer
      Pan-Pacefic Continence Sosiety 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 非ベンゾジアゼピン系睡眠薬は膀胱知覚神経を介し利尿モデルラットの尿量を減少させる2019

    • Author(s)
      長瀬桂子、伊藤秀明、青木芳隆、福島正人、土山克樹、多賀峰克、関雅也、稲村聡、横山 修
    • Organizer
      第107回日本泌尿器科学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ラット腎臓における抗コリン薬を介した尿再吸収に関する検討2019

    • Author(s)
      大江秀樹、吉木はつみ、査新民、小林久人、福島正人、青木芳隆、伊藤秀明、横山修
    • Organizer
      第26回日本排尿機能学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Night-time frequency deteriorate sleep and quality of life: an analysis of international prostate symptom score and sleep questionnaire2017

    • Author(s)
      Y.Matsuta, Y.Aoki, H.Ito, O.Yokoyama
    • Organizer
      International Continence Society 47th Annual Meeting(ICS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Appearance of high endothelial venule-like vessels in benign prostatic hyperplasia is associated with bladder outlet obstruction2017

    • Author(s)
      S.Inamura, T.Shinagawa, H.Hoshino, Y.Sakai, Y.Imamura, O.Yokoyama, M.Kobayashi
    • Organizer
      International Continence Society 47th Annual Meeting(ICS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Is overactive bladder another facet of the metabolic syndrome? : a cross-sectional study among japanese men and women2017

    • Author(s)
      Y.Aoki, M.Okada, Y.Matsuta, H.Ito, C.Matsumoto, Y.Kusaka, O.Yokoyama
    • Organizer
      International Continence Society 47th Annual Meeting(ICS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Accuracy of bladder volume determination using a new portable handheld ultrasound bladder scanner: a prospective study of 34 consecutive inpatients2017

    • Author(s)
      Y.Aoki, E.Sasamura, C.Kimura, K.Fujita, A.Itoga, Y.Matsuta, H.Ito, O.Yokoyama
    • Organizer
      International Continence Society 47th Annual Meeting(ICS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Long-term anticholinergic add-on therapy in overactive bladder (OAB) patients refractory to mirabegron monotherapy: a multicentre,randomized study (MILAI II study)2017

    • Author(s)
      O.Yamaguchi, H.Kakizaki, Y.Homma, Y.Igawa, M.Takeda, O.Nishizawa, M.Gotoh, M.Yoshida, O.Yokoyama, N.Seki, T.Hamada, K.Kuroishi
    • Organizer
      International Continence Society 47th Annual Meeting(ICS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pharmacological treatment of urinary incontinence in Japan2017

    • Author(s)
      O.Yokoyama
    • Organizer
      2017 TUA Annual Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Relationship between overactive bladder and metabolic syndrome: A cross-sectional study among Japanese men and women2017

    • Author(s)
      Y.Aoki, C.Matsumoto, Y.Matsuta, H.Ito, Y.Kusaka, O.Yokoyama
    • Organizer
      AUA Annual Meeting 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Overactive bladder is related to sexual well-being in japanese women2017

    • Author(s)
      Y.Aoki, K.Sasaki, Y.Matsuta, H.Ito, C.Matsumoto, Y.Kusaka, O.Yokoyama
    • Organizer
      AUA Annual Meeting 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of imidafenacin on urine production, voided volume, and hours of undisturbed sleep in overactive bladder patients with nocturnal polyuria; post hoc analysis of two clinical trials2017

    • Author(s)
      O.Yokoyama, M.Takeda, M.Gotoh, M.Yoshida, H.Kakizaki, S.Takahashi, N.Masumori
    • Organizer
      EAU2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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