{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T17:22:03Z","timestamp":1787764923339,"version":"build-2784847793"},"reference-count":51,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"2","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2024,3]]},"abstract":"<jats:p>\n                    In order to explore the impact of circadian disturbance on erectile function, we randomly divided 24 adult male rats into groups of control (light on at 8:00 a.m. and off at 8:00 p.m.), dark\/dark (DD; constant dark), light\/light (LL; constant light), and shift dark\/light (DL; light off at 8:00 a.m. and on at 8:00 p.m.). Four weeks later, erectile function was measured and corpora cavernosa were harvested for analysis. The maximum intracavernous pressure (mICP) and mICP\/mean arterial pressure (MAP) ratio in the DD, LL, and DL groups were significantly lower than that in the control group. The LL and DL groups showed significantly attenuated endothelial nitric oxide synthase (eNOS), while DD, LL, and DL showed reduced neuronal nitric oxide synthase (nNOS) at both mRNA and protein levels. The production of nitric oxide (NO) and cyclic guanosine monophosphate (cGMP) was inhibited by altered light\/dark cycles to varying degrees. Circadian disturbance impaired endothelial function and contributed to erectile dysfunction. For the core circadian elements, mRNA expression of circadian locomotor output cycles kaput (\n                    <jats:italic toggle=\"yes\">Clock<\/jats:italic>\n                    ) and brain\/muscle aryl-hydrocarbon receptor nuclear translocator-like protein 1 (\n                    <jats:italic toggle=\"yes\">Bmal1<\/jats:italic>\n                    ) was elevated in the DL group, but their protein expression was not significantly changed. DD, LL, and DL increased period 1 (\n                    <jats:italic toggle=\"yes\">Per1<\/jats:italic>\n                    ) and\n                    <jats:italic toggle=\"yes\">Per3<\/jats:italic>\n                    levels, while LL and DL increased PER1 levels. No significant difference was found for\n                    <jats:italic toggle=\"yes\">Per2<\/jats:italic>\n                    levels, and PER2 and PER3 concentrations were not significantly changed. Moreover, LL and DL significantly increased cryptochrome-1 (CRY1) and CRY2 at both mRNA and protein levels. The altered light\/dark rat model showed that circadian disturbance contributed to erectile dysfunction probably by impairing endothelial function. Meanwhile, the core circadian elements were detected in the corpora cavernosa, but these were disrupted. However, which circadian element regulates erectile function and how it works need further analysis.\n                  <\/jats:p>","DOI":"10.4103\/aja202345","type":"journal-article","created":{"date-parts":[[2023,12,1]],"date-time":"2023-12-01T08:01:05Z","timestamp":1701417665000},"page":"205-211","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":7,"title":["Circadian disturbance induces erectile dysfunction by impairing endothelial function"],"prefix":"10.4103","volume":"26","author":[{"given":"Tao","family":"Li","sequence":"first","affiliation":[{"name":"Department of Urology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China"},{"name":"Department of Urology, Guizhou Provincial People\u2019s Hospital, Guiyang 550002, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi-Ting","family":"Jiang","sequence":"additional","affiliation":[{"name":"Department of Otorhinolaryngology, 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