Now showing items 11-20 of 594
Circadian rhythms of locomotor activity and hippocampal clock genes expression are dampened in vitamin A-deficient rats
(Elsevier Inc, 2014-04)
The main external time giver is the day-night cycle; however, signals from feeding and the activity/rest cycles can entrain peripheral clocks, such as the hippocampus, in the absence of light. Knowing that vitamin A and ...
Circadian rhythms of proliferation events in two mouse carcinomas
(Taylor & Francis Ltd, 2015-07)
We studied the index of DNA synthesis (DNAs) of two cellular carcinomas: the hepatocellular ES12a and the mammary TN60 of mice, throughout one circadian cycle. In the results, we observed that both tumors have circadian ...
Characterization of locomotor activity circadian rhythms in athymic nude mice
(BioMed Central, 2013-02)
BACKGROUND: The relation between circadian dysregulation and cancer incidence and progression has become a topic of major interest over the last decade. Also, circadian timing has gained attention regarding the use of ...
Circadian Pattern of Wheel-Running Activity of a South American Subterranean Rodent (Ctenomys cf knightii)
(TAYLOR & FRANCIS INC, 2009)
Circadian rhythms are regarded as essentially ubiquitous features of animal behavior and are thought to confer important adaptive advantages. However, although circadian systems of rodents have been among the most extensively ...
Circadian rhythms identified in Caenorhabditis elegans by in vivo long-term monitoring of a bioluminescent reporter
(National Academy of Sciences, 2016-11)
Circadian rhythms are based on endogenous clocks that allow organisms to adjust their physiology and behavior by entrainment to the solar day and, in turn, to select the optimal times for most biological variables. Diverse ...
Serotonin and circadian rhythms
(Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio)Universidade de Brasília (UnB)Universidade de São Paulo (USP), 2014)
Experimental assessment of the network properties of the Drosophila circadian clock
Circadian rhythms are conserved across kingdoms and coordinate physiology and behavior for appropriate time-keeping. The neuronal populations that govern circadian rhythms are described in many animal models, and the current ...
Immunosuppressant calcineurin inhibitors phase shift circadian rhythms and inhibit circadian responses to light
PP2B is a Ca2+/calmodulin-dependent protein phosphatase that is ubiquitously expressed in mammals. Among other actions, it is an effector mechanism in NMDA-mediated glutamate neurotransmission as well as a regulator of ...