Abstract:
:The aim of this study was to analyse the circadian behavioural responses of mice carrying a functional knockout of the Per3 gene (Per3(-/-)) to different light : dark (L : D) cycles. Male adult wild-type (WT) and Per3(-/-) mice were kept under 12-hour light : 12-hour dark conditions (12L : 12D) and then transferred to either a short or long photoperiod and subsequently released into total darkness. All mice were exposed to both conditions, and behavioural activity data were acquired through running wheel activity and analysed for circadian characteristics during these conditions. We observed that, during the transition from 12L : 12D to 16L : 8D, Per3(-/-) mice take approximately one additional day to synchronise to the new L : D cycle compared to WT mice. Under these long photoperiod conditions, Per3(-/-) mice were more active in the light phase. Our results suggest that Per3(-/-) mice are less sensitive to light. The data presented here provides further evidence that Per3 is involved in the suppression of behavioural activity in direct response to light.
journal_name
Biomed Res Intjournal_title
BioMed research internationalauthors
Pereira DS,van der Veen DR,Gonçalves BS,Tufik S,von Schantz M,Archer SN,Pedrazzoli Mdoi
10.1155/2014/170795subject
Has Abstractpub_date
2014-01-01 00:00:00pages
170795eissn
2314-6133issn
2314-6141journal_volume
2014pub_type
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