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The sensation of bladder fullness (SBF) is sensed by mechano-sensor such as Piezo1 and TRPV4 in the mouse bladder urothelium. However, functional circadian rhythms of such mechano-sensors remain unknown. To investigate functional circadian changes of these mechano-sensors, we measured circadian changes in stretch-evoked intracellular Ca<jats:sup>2+<\/jats:sup> influx ([Ca<jats:sup>2+<\/jats:sup>]<jats:sub>\n                  <jats:italic>i<\/jats:italic>\n                <\/jats:sub>) using mouse primary cultured urothelial cells (MPCUCs). Using Ca<jats:sup>2+<\/jats:sup> imaging, stretch-evoked [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>\n                  <jats:italic>i<\/jats:italic>\n                <\/jats:sub> was quantified every 4\u2009h in MPCUCs derived from wild-type (WT) and <jats:italic>Clock<\/jats:italic><jats:sup>\n                  <jats:italic>\u039419\/\u039419<\/jats:italic>\n                <\/jats:sup> mice, which showed a nocturia phenotype. Furthermore, a Piezo1 inhibitor GsMTx4 and a TRPV4 inhibitor Ruthenium Red were applied and stretch-evoked [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>\n                  <jats:italic>i<\/jats:italic>\n                <\/jats:sub> in MPCUCs was measured to investigate their contribution to SBF. Stretch-evoked [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>\n                  <jats:italic>i<\/jats:italic>\n                <\/jats:sub> showed a circadian rhythm in the WT mice. In contrast, <jats:italic>Clock<\/jats:italic><jats:sup>\n                  <jats:italic>\u039419\/\u039419<\/jats:italic>\n                <\/jats:sup> mice showed disrupted circadian rhythm. The administration of both GsMTx4 and Ruthenium Red eliminated the circadian rhythm of stretch-evoked [Ca<jats:sup>2+<\/jats:sup>]<jats:sub>\n                  <jats:italic>i<\/jats:italic>\n                <\/jats:sub> in WT mice. We conclude that SBF may have a circadian rhythm, which is created by functional circadian changes of Piezo1 and TRPV4 being controlled by clock genes to be active during wakefulness and inactive during sleep. Abnormalities of clock genes disrupt SBF, and induce nocturia.<\/jats:p>","DOI":"10.1038\/s41598-018-23115-w","type":"journal-article","created":{"date-parts":[[2018,4,4]],"date-time":"2018-04-04T03:21:29Z","timestamp":1522812089000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":37,"title":["The oscillation of intracellular Ca2+ influx associated with the circadian expression of Piezo1 and TRPV4 in the bladder urothelium"],"prefix":"10.1038","volume":"8","author":[{"given":"Tatsuya","family":"Ihara","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takahiko","family":"Mitsui","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuki","family":"Nakamura","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mie","family":"Kanda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sachiko","family":"Tsuchiya","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoru","family":"Kira","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroshi","family":"Nakagomi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norifumi","family":"Sawada","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manabu","family":"Kamiyama","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuri","family":"Hirayama","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5267-6155","authenticated-orcid":false,"given":"Eiji","family":"Shigetomi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Youichi","family":"Shinozaki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8695-884X","authenticated-orcid":false,"given":"Mitsuharu","family":"Yoshiyama","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atsuhito","family":"Nakao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masayuki","family":"Takeda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Schuichi","family":"Koizumi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2018,4,9]]},"reference":[{"key":"23115_CR1","doi-asserted-by":"publisher","first-page":"876","DOI":"10.1016\/j.addr.2010.06.004","volume":"62","author":"H Okamura","year":"2010","unstructured":"Okamura, H., Doi, M., Fustin, J. 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