Increased late night response to light controls the circadian pacemaker in a nocturnal primate.

abstract：:Daylight saving time (DST) is a source of circadian disruption impinging on millions of people every year. Our aim was to assess modifications, if any, in the number, type, and outcome of Accident & Emergency (A&E) visits/return visits over the DST months. The study included 366,527 visits and 84,380 return visits to ...

journal_title：Journal of biological rhythms

authors： Ferrazzi E,Romualdi C,Ocello M,Frighetto G,Turco M,Vigolo S,Fabris F,Angeli P,Vettore G,Costa R,Montagnese S

更新日期：2018-10-01 00:00:00

abstract：:The aim of this study was to replicate and extend previous work in which the authors observed lower, shorter, and advanced nocturnal melatonin secretion patterns in premenstrually depressed patients compared to those in healthy control women. The authors also sought to test the hypothesis that the therapeutic effect o...

journal_title：Journal of biological rhythms

authors： Parry BL,Berga SL,Mostofi N,Klauber MR,Resnick A

更新日期：1997-02-01 00:00:00

abstract：:Sleep disturbances are an all-too-familiar symptom of jet lag and a prime source of complaints for transmeridian travelers and flight crews alike. They are the result of a temporary loss of synchrony between an abruptly shifted sleep period, timed in accordance with the new local day-night cycle, and a gradually reent...

journal_title：Journal of biological rhythms

authors： Boulos Z,Campbell SS,Lewy AJ,Terman M,Dijk DJ,Eastman CI

更新日期：1995-06-01 00:00:00

abstract：:Most cyclic biological processes are under control of a circadian molecular timing system that synchronizes these phenomena to the 24-h day. One generic property of circadian-controlled processes is that they operate within a specific temperature range, below which the manifestation of rhythm ceases. Little is known a...

journal_title：Journal of biological rhythms

authors： Maguire SE,Schmidt PS,Sehgal A

更新日期：2014-06-01 00:00:00

abstract：:A physiologically based mathematical model of a putative sleep-wake regulatory network is used to investigate the transition from typical human sleep patterns to spontaneous internal desynchrony behavior observed under temporal isolation conditions. The model sleep-wake regulatory network describes the neurotransmitte...

journal_title：Journal of biological rhythms

authors： Gleit RD,Diniz Behn CG,Booth V

更新日期：2013-10-01 00:00:00

abstract：:The SCN has long had organizational schemas imposed on it. In most, the SCN is dichotomized, with one region typically associated with the presence of vasopressin cells and the other associated with cells containing vasoactive intestinal polypeptide and certain afferent terminal fields. If assumed to be accurate, the ...

journal_title：Journal of biological rhythms

authors： Morin LP

更新日期：2007-02-01 00:00:00

abstract：:The large repertoire of circadian rhythms in diverse organisms depends on oscillating central clock genes, input pathways for entrainment, and output pathways for controlling rhythmic behaviors. Stress-activated p38 MAP Kinases (p38K), although sparsely investigated in this context, show circadian rhythmicity in mamma...

journal_title：Journal of biological rhythms

authors： Vrailas-Mortimer AD,Ryan SM,Avey MJ,Mortimer NT,Dowse H,Sanyal S

更新日期：2014-12-01 00:00:00

abstract：:Past research has shown that there is a circadian oscillator in laboratory rats that is entrained by restricted feeding schedules. However, in laboratory rats at least, the light-dark (LD) cycle is the dominant zeitgeber in the entrainment of wheel-running activity rhythms. Given that dasyurid marsupials are predomina...

journal_title：Journal of biological rhythms

authors： Coleman GJ,O'Reilly HM,Armstrong SM

更新日期：1989-04-01 00:00:00

abstract：:Nonphotic stimuli can reset and entrain circadian activity rhythms in hamsters and mice, and serotonin is thought to be involved in the phase-resetting effects of these stimuli. In the present study, the authors examined the effect of the serotonin agonist quipazine on circadian activity rhythms in three inbred strain...

journal_title：Journal of biological rhythms

authors： Kohler M,Kalkowski A,Wollnik F

更新日期：1999-04-01 00:00:00

abstract：:Although pineal "synaptic" ribbons (SR) are frequently examined by means of quantitative electron microscopy, their functional significance remains unclear. The same is true for related structures--"synaptic" spherules (SPH). In the course of such studies, it has been noted that SR counts may differ from laboratory to...

journal_title：Journal of biological rhythms

authors： Karasek M,Lewinski A,Vollrath L

更新日期：1988-04-01 00:00:00

abstract：:Various aspects of mammalian endocrine physiology show a time-of-day variation with a period of 24 h, which represents an adaptation to the daily environmental fluctuations resulting from the rotation of the earth. These 24-h rhythms in hormone abundance and consequently hormone function may rely on rhythmic signals p...

journal_title：Journal of biological rhythms

authors： Lin XW,Blum ID,Storch KF

更新日期：2015-08-01 00:00:00

abstract：:Many mammalian cell types show daily rhythms in gene expression driven by a circadian pacemaker. For example, cultured astrocytes display circadian rhythms in Period1 and Period2 expression. It is not known, however, how or which intercellular factors synchronize and sustain rhythmicity in astrocytes. Because astrocyt...

journal_title：Journal of biological rhythms

authors： Marpegan L,Krall TJ,Herzog ED

更新日期：2009-04-01 00:00:00

abstract：:We have recently shown that molecular rhythms in the murine suprachiasmatic nucleus (SCN) are affected by repeated social defeat (SD) during the dark/active phase (social defeat dark [SDD]), while repeated SD during the light/inactive phase (social defeat light [SDL]) had no influence on PERIOD2::LUCIFERASE explant rh...

journal_title：Journal of biological rhythms

authors： Bartlang MS,Oster H,Helfrich-Förster C

更新日期：2015-06-01 00:00:00

abstract：:The authors analyzed the upstream regulatory region of purF, a gene that is expressed in a minority phase that peaks at dawn (class 2 circadian phasing) in Synechococcus elongatus, to determine whether specific cis elements are responsible for this characteristic expression pattern. Fusions of various promoter-bearing...

journal_title：Journal of biological rhythms

authors： Min H,Liu Y,Johnson CH,Golden SS

更新日期：2004-04-01 00:00:00

abstract：:The mammalian circadian clock in the suprachiasmatic nucleus (SCN) drives and maintains 24-h physiological rhythms, the phases of which are set by the local environmental light-dark cycle. Gastrin-releasing peptide (GRP) communicates photic phase setting signals in the SCN by increasing neurophysiological activity of ...

journal_title：Journal of biological rhythms

authors： Gamble KL,Kudo T,Colwell CS,McMahon DG

更新日期：2011-04-01 00:00:00

abstract：:Two major approaches have been used to model circadian clocks. Qualitative modeling, used prior to the recent wealth of detailed molecular knowledge, makes general predictions but cannot provide detailed mechanistic insights. The more recent biophysical approach, on the other hand, incorporates the biochemical events ...

journal_title：Journal of biological rhythms

authors： Forger D,Gonze D,Virshup D,Welsh DK

更新日期：2007-06-01 00:00:00

abstract：:Crustaceans have frequently been used to study the neuroethology of both agonistic behavior and circadian rhythms, but whether their highly stereotyped and quantifiable agonistic activity is controlled by circadian pacemakers has, so far, not been investigated. Isolated marbled crayfish (Procambarus spec.) displayed r...

journal_title：Journal of biological rhythms

authors： Farca Luna AJ,Hurtado-Zavala JI,Reischig T,Heinrich R

更新日期：2009-02-01 00:00:00

abstract：:The circadian rhythm of eclosion activity and its pacemaker were analyzed in a series of latitudinal races of Drosophila auraria ranging from 34.2 degrees to 42.9 degrees N in Japan. The phase of the rhythm (psi EL) to the daily photoperiod (PP) changes as daylength is increased, and the slope of psi EL (PP) changes w...

journal_title：Journal of biological rhythms

authors： Pittendrigh CS,Takamura T

更新日期：1989-07-01 00:00:00

abstract：:Most visual system functions, such as opsin gene expression, retinal neural transmission, light perception, and visual sensitivity, display robust day-night rhythms. The rhythms persist in constant lighting conditions, suggesting the involvement of endogenous circadian clocks. While the circadian pacemakers that contr...

journal_title：Journal of biological rhythms

authors： Li L

更新日期：2019-10-01 00:00:00

abstract：:The hypothalamic suprachiasmatic nucleus (SCN), a circadian pacemaker, is present in all mammalian brains. It has a complex organization of peptide-containing neurons that is similar among species, but calcium-binding proteins are expressed variably. Neurons containing calretinin have been described in the SCN in a nu...

journal_title：Journal of biological rhythms

authors： Moore RY

更新日期：2016-08-01 00:00:00

abstract：:Activity patterns are the product of interactions between an internal circadian clock and direct responses to photic and nonphotic features of the environment that are said to "mask" the influence of that clock. Evolutionary transitions between nocturnality and diurnality involve changes in mechanisms underlying both ...

journal_title：Journal of biological rhythms

authors： Cohen R,Smale L,Kronfeld-Schor N

更新日期：2010-02-01 00:00:00

abstract：:A single light episode during the first larval stage can set the phase of adult Drosophila activity rhythms, showing that a light-sensitive circadian clock is functional in larvae and is capable of keeping time throughout development. These behavioral data are supported by the finding that neurons expressing clock pro...

journal_title：Journal of biological rhythms

authors： Malpel S,Klarsfeld A,Rouyer F

更新日期：2004-02-01 00:00:00

abstract：:Entrainability of the circadian rhythm of mosquito flight and locomotor activity was investigated by giving a 24-hr temperature cycle (28 degrees C for 16 hr, 23 degrees C for 8 hr) to the free-running rhythm or by shifting the temperature cycle. The phase angle difference between the entrained rhythm and the temperat...

journal_title：Journal of biological rhythms

authors： Chiba Y,Uki M,Kawasaki Y,Matsumoto A,Tomioka K

更新日期：1993-10-01 00:00:00

abstract：:To date, it is largely unknown which light settings define the optimum to steer alertness and cognitive control during regular daytime working hours. In the current article, we used a multimeasure approach combined with a relatively large sample size ( N = 60) and a large range of intensity levels (20-2000 lux at eye ...

journal_title：Journal of biological rhythms

authors： Smolders KCHJ,Peeters ST,Vogels IMLC,de Kort YAW

更新日期：2018-12-01 00:00:00

abstract：:Female Drosophila melanogaster, like many other organisms, exhibit different behavioral repertoires after mating with a male. These postmating responses (PMRs) include increased egg production and laying, increased rejection behavior (avoiding further male advances), decreased longevity, altered gustation and decrease...

journal_title：Journal of biological rhythms

authors： Garbe DS,Vigderman AS,Moscato E,Dove AE,Vecsey CG,Kayser MS,Sehgal A

更新日期：2016-12-01 00:00:00

abstract：:We examine theoretical models for circadian oscillations based on transcriptional regulation in Drosophila and Neurospora. For Drosophila, the molecular model is based on the negative feedback exerted on the expression of the per and tim genes by the complex formed between the PER and TIM proteins. For Neurospora, sim...

journal_title：Journal of biological rhythms

authors： Leloup JC,Gonze D,Goldbeter A

更新日期：1999-12-01 00:00:00

abstract：:The temporal expression pattern of the circadian clock gene period was compared between heads of the linden bug, Pyrrhocoris apterus , kept under diapause-promoting short days (SD) and diapause-preventing long days (LD) using a real-time PCR quantification. Diapause or reproduction was programmed by photoperiod during...

journal_title：Journal of biological rhythms

authors： Dolezel D,Sauman I,Kost'ál V,Hodkova M

更新日期：2007-08-01 00:00:00

abstract：:The authors have shown previously that vasopressin (VP) release from suprachiasmatic nucleus (SCN) efferents in rats is important for the timing of the circadian activity of the hypothalamo-pituitary-adrenal (HPA) axis, resulting in a circadian rise in corticosterone at dusk. When meals are supplied at a fixed time du...

journal_title：Journal of biological rhythms

authors： Kalsbeek A,van Heerikhuize JJ,Wortel J,Buijs RM

更新日期：1998-02-01 00:00:00

abstract：:Photoreception in the mammalian retina is not restricted to rods and cones but extends to a small number of intrinsically photosensitive retinal ganglion cells expressing the photopigment melanopsin. These mRGCs are especially important contributors to circadian entrainment, the pupil light reflex, and other so-called...

journal_title：Journal of biological rhythms

authors： Enezi Ja,Revell V,Brown T,Wynne J,Schlangen L,Lucas R

更新日期：2011-08-01 00:00:00

abstract：:The role of the intergeniculate leaflet of the thalamus (IGL) in photoperiod responsiveness was examined in a laboratory-selected line of photoperiod nonresponsive (NR) Siberian hamsters. NR hamsters fail to exhibit typical winter-type responses (i.e., gonadal regression and development of winter-type pelage) when exp...

journal_title：Journal of biological rhythms

authors： Freeman DA,Teubner BJ,Goldman BD

更新日期：2006-06-01 00:00:00