Daily coordination of orexinergic gating in the rat superior colliculus—Implications for intrinsic clock activities in the visual system

Lukasz Chrobok, Jagoda Stanislawa Jeczmien-Lazur, Monika Bubka, Kamil Pradel, Aleksandra Klekocinska, Jasmin Daniela Klich, Amalia Ridla Rahim, Jihwan Myung, Mariusz Kepczynski, Marian Henryk Lewandowski

研究成果: 雜誌貢獻文章同行評審

1 引文 斯高帕斯(Scopus)

摘要

The orexinergic system delivers excitation for multiple brain centers to facilitate behavioral arousal, with its malfunction resulting in narcolepsy, somnolence, and notably, visual hallucinations. Since the circadian clock underlies the daily arousal, a timed coordination is expected between the orexin system and its target subcortical visual system, including the superior colliculus (SC). Here, we use a combination of electrophysiological, immunohistochemical, and molecular approaches across 24 h, together with the neuronal tract-tracing methods to investigate the daily coordination between the orexin system and the rodent SC. Higher orexinergic input was found to occur nocturnally in the superficial layers of the SC, in time for nocturnal silencing of spontaneous firing in this visual brain area. We identify autonomous daily and circadian expression of clock genes in the SC, which may underlie these day–night changes. Additionally, we establish the lateral hypothalamic origin of the orexin innervation to the SC and that the SC neurons robustly respond to orexin A via OX2 receptor in both excitatory and GABAA receptor-dependent inhibitory manners. Together, our evidence elucidates the combination of intrinsic and extrinsic clock mechanisms that shape the daily function of the visual layers of the SC.

原文英語
文章編號e21930
期刊FASEB Journal
35
發行號10
DOIs
出版狀態已發佈 - 十月 2021

ASJC Scopus subject areas

  • 生物技術
  • 生物化學
  • 分子生物學
  • 遺傳學

指紋

深入研究「Daily coordination of orexinergic gating in the rat superior colliculus—Implications for intrinsic clock activities in the visual system」主題。共同形成了獨特的指紋。

引用此