Počet záznamů: 1
Melatonin is a redundant entraining signal in the rat circadian system
- 1.
SYSNO ASEP 0460148 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Melatonin is a redundant entraining signal in the rat circadian system Tvůrce(i) Houdek, Pavel (FGU-C) ORCID
Nováková, Marta (FGU-C)
Polidarová, Lenka (FGU-C) RID, ORCID
Sládek, Martin (FGU-C) RID, ORCID, SAI
Sumová, Alena (FGU-C) RID, ORCIDZdroj.dok. Hormones and Behavior. - : Elsevier - ISSN 0018-506X
Roč. 83, Jul (2016), s. 1-5Poč.str. 5 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova melatonin ; pinealectomy ; suprachiasmatic nucleus ; liver ; duodenum ; clock gene Vědní obor RIV ED - Fyziologie CEP GA14-07711S GA ČR - Grantová agentura ČR Institucionální podpora FGU-C - RVO:67985823 UT WOS 000378981500001 EID SCOPUS 84969611253 DOI 10.1016/j.yhbeh.2016.05.006 Anotace The role of melatonin in maintaining proper function of the circadian system has been proposed but very little evidence for such an effect has been provided. To ascertain the role, the aim of the study was to investigate impact of long-term melatonin absence on regulation of circadian system. The parameters of behavior and circadian clocks of rats which were devoid of the melatonin signal due to pinealectomy (PINX) for more than one year were compared with those of intact age-matched controls. PINX led to a decrease in spontaneous locomotor activity and a shortening of the free-running period of the activity rhythm driven by the central clock in the suprachiasmatic nuclei (SCN) in constant darkness. However, the SCN-driven rhythms in activity and feeding were not affected and remained well entrained in the light/dark cycle. In contrast, in these conditions PINX had a significant effect on amplitudes of the clock gene expression rhythms in the duodenum and also partially in the liver. These results demonstrate the significant impact of long-term melatonin absence on period of the central clock in the SCN and the amplitudes of the peripheral clocks in duodenum and liver and suggest that melatonin might be a redundant but effective endocrine signal for these clocks. Pracoviště Fyziologický ústav Kontakt Lucie Trajhanová, lucie.trajhanova@fgu.cas.cz, Tel.: 241 062 400 Rok sběru 2017
Počet záznamů: 1