Reduced VIP Expression Affects Circadian Clock Function in VIP-IRES-CRE Mice (JAX 010908).

abstract：:The mammalian circadian pacemaker is located in the suprachiasmatic nucleus (SCN). Various inputs modulate pacemaker phase, including the serotonergic (5HTergic) input from the midbrain raphe. 5HT phase-advances the SCN pacemaker when applied during mid subjective day. In vitro studies indicate that 5HT advances the m...

journal_title：Journal of biological rhythms

authors： Jovanovska A,Prosser RA

更新日期：2002-04-01 00:00:00

abstract：:Honey bee workers care for ("nurse") the brood around the clock without circadian rhythmicity, but then they forage outside with strong circadian rhythms and a consolidated nightly rest. This chronobiological plasticity is associated with variation in the expression of the canonical "clock genes" that regulate the cir...

journal_title：Journal of biological rhythms

authors： Rodriguez-Zas SL,Southey BR,Shemesh Y,Rubin EB,Cohen M,Robinson GE,Bloch G

更新日期：2012-02-01 00:00:00

abstract：:Obesity during pregnancy causes numerous maternal and fetal health complications, but the underlying mechanisms remain unclear. Adipose tissue dysfunction in obesity has previously been linked to disruption of the intrinsic adipose clock gene network that is crucial for normal metabolic function. This adipose clock al...

journal_title：Journal of biological rhythms

authors： Crew RC,Mark PJ,Waddell BJ

更新日期：2018-06-01 00:00:00

abstract：:To determine if a circadian rhythm known to be functionally related to the reproductive axis varies on a circannual basis, we monitored the circadian secretion of melatonin at monthly intervals for 2 years in four ovariectomized, estradiol-implanted ewes held in a constant short-day photoperiod. Prior to the study, ew...

journal_title：Journal of biological rhythms

authors： Thrun LA,Moenter SM,O'Callaghan D,Woodfill CJ,Karsch FJ

更新日期：1995-03-01 00:00:00

abstract：:Numerous studies have demonstrated sleep-promoting effects of melatonin treatment in humans, as evidenced by subjects' self-reports, polysomnographic recordings, and continuous actigraphic registration of motor activity. The sleep-promoting effects of either physiological or pharmacological doses of melatonin typicall...

journal_title：Journal of biological rhythms

authors： Zhdanova IV,Wurtman RJ

更新日期：1997-12-01 00:00:00

abstract：:Almost exclusively, photoperiodic insects respond to a given photoperiod in one of two ways: a "long-day" response or a "short-day" response. Intermediate responses occur only at a very restricted range of photoperiods (often less than 30 min) and are generally population phenomena rather than intermediate responses o...

journal_title：Journal of biological rhythms

authors： Wassmer GT,Page TL

更新日期：1993-04-01 00:00:00

abstract：:Temperature compensation of circadian rhythms in neuronal firing rate was investigated in the suprachiasmatic nucleus (SCN) of ground squirrels and rats in vitro. A reduction in SCN temperature from 37 to 25 degrees C reduced peak firing rates by > 70% in rats but only by approximately 21% in squirrels; trough firing ...

journal_title：Journal of biological rhythms

authors： Ruby NF,Heller HC

更新日期：1996-06-01 00:00:00

abstract：:Despite the omnipresence of artificial and natural light exposure, there exists little guidance in the United States and elsewhere on light exposure in terms of timing, intensity, spectrum, and other light characteristics known to affect human health, performance, and well-being; in parallel, there is little informati...

journal_title：Journal of biological rhythms

authors： Mason IC,Boubekri M,Figueiro MG,Hasler BP,Hattar S,Hill SM,Nelson RJ,Sharkey KM,Wright KP,Boyd WA,Brown MK,Laposky AD,Twery MJ,Zee PC

更新日期：2018-10-01 00:00:00

abstract：:The mammalian SCN contains a biological clock that drives remarkably precise circadian rhythms in vivo and in vitro. Recent advances have revealed molecular and cellular mechanisms required for the generation of these daily rhythms and their synchronization between SCN neurons and to the environmental light cycle. Thi...

journal_title：Journal of biological rhythms

authors： Hastings MH,Herzog ED

更新日期：2004-10-01 00:00:00

abstract：:The daily biological clock regulates the timing of sleep and physiological processes that are of fundamental importance to human health, performance, and well-being. Environmental parameters of relevance to biological clocks include (1) daily fluctuations in light intensity and temperature, and (2) seasonal changes in...

journal_title：Journal of biological rhythms

authors： Ciarleglio CM,Ryckman KK,Servick SV,Hida A,Robbins S,Wells N,Hicks J,Larson SA,Wiedermann JP,Carver K,Hamilton N,Kidd KK,Kidd JR,Smith JR,Friedlaender J,McMahon DG,Williams SM,Summar ML,Johnson CH

更新日期：2008-08-01 00:00:00

abstract：:Mice with targeted gene disruption have provided important information about the molecular mechanisms of circadian clock function. A full understanding of the roles of circadian-relevant genes requires manipulation of their expression in a tissue-specific manner, ideally including manipulation with high efficiency wit...

journal_title：Journal of biological rhythms

authors： Weaver DR,van der Vinne V,Giannaris EL,Vajtay TJ,Holloway KL,Anaclet C

更新日期：2018-04-01 00:00:00

abstract：:The circadian clock controls 24-h biological rhythms in our body, influencing many time-related activities such as sleep and wake. The simplest circadian clock is found in cyanobacteria, with the proteins KaiA, KaiB, and KaiC generating a self-sustained circadian oscillation of KaiC phosphorylation and dephosphorylati...

journal_title：Journal of biological rhythms

authors： Jeong YM,Dias C,Diekman C,Brochon H,Kim P,Kaur M,Kim YS,Jang HI,Kim YI

更新日期：2019-08-01 00:00:00

abstract：:Intertidal species have both circadian and circatidal clocks. Although the behavioral evidence for these oscillators is more than 5 decades old, virtually nothing is known about their molecular clockwork. Pigment-dispersing hormones (PDHs) were originally described in crustaceans. Their insect homologs, pigment-disper...

journal_title：Journal of biological rhythms

authors： Beckwith EJ,Lelito KR,Hsu YW,Medina BM,Shafer O,Ceriani MF,de la Iglesia HO

更新日期：2011-12-01 00:00:00

abstract：:How the cellular elements of the SCN are synchronized to each other is not well understood. We explore circadian oscillations manifest at the level of the cell, the tissue, and the whole animal to better understand intra-SCN synchrony and master clock function of the nucleus. At each level of analysis, responses to va...

journal_title：Journal of biological rhythms

authors： Butler MP,Silver R

更新日期：2009-10-01 00:00:00

abstract：:The frequency demultiplication hypothesis (FDH) posits that circannual rhythms are generated from circadian cycles by frequency transformation to the lower-frequency rhythm. To test the FDH, we determined the periods of the circannual body mass and estrous cycles of golden-mantled ground squirrels with circadian locom...

journal_title：Journal of biological rhythms

authors： Carmichael MS,Zucker I

更新日期：1986-01-01 00:00:00

abstract：:Ground squirrels, Spermophilus tridecemlineatus, were kept in a 12:12 h light-dark cycle. As expected for a diurnal species, their locomotor activity occurred almost entirely in the daytime. Expression of mPer1 and mPer2 in the suprachiasmatic nucleus was studied at six time points by in situ hybridization. For both t...

journal_title：Journal of biological rhythms

authors： Mrosovsky N,Edelstein K,Hastings MH,Maywood ES

更新日期：2001-10-01 00:00:00

abstract：:The authors sought to investigate the role of phytochromes A and B (phyA and phyB) and cryptochromes 1 and 2 (cryl and cry2) in the synchronization of the leaf position rhythm in Arabidopsis thaliana. The seedlings were transferred from white light-dark cycles to free-running conditions with or without exposure to a l...

journal_title：Journal of biological rhythms

authors： Yanovsky MJ,Mazzella MA,Whitelam GC,Casal JJ

更新日期：2001-12-01 00:00:00

abstract：:Systematic treatment of hamsters with triazolam (TRZ) or novel wheel (NW) access will yield PRCs similar to those for neuropeptide Y. Both TRZ and NW access require an intact intergeniculate leaflet (IGL) to modulate circadian rhythm phase. It is commonly suggested that both stimulus types influence rhythm phase respo...

journal_title：Journal of biological rhythms

authors： Meyer-Bernstein EL,Morin LP

更新日期：1998-12-01 00:00:00

abstract：:To assess binocular interactions and possible ocular dominance in entrainment of circadian rhythms, Syrian hamsters maintained in LL were subjected for several weeks to schedules of eye occlusion with opaque contact lenses. In separate groups, the opaque lens was inserted into the left or right eye for 12 h at the sam...

journal_title：Journal of biological rhythms

authors： Park JH,Paul MJ,Butler MP,Zucker I

更新日期：2005-02-01 00:00:00

abstract：:Drosophila littoralis is a latitudinally widespread European species of the Drosophila virilis group. The species has ample genetic variation in photoperiodism (adult diapause) and circadian rhythmicity (pupal eclosion rhythm), with adaptive latitudinal clines in both of them. The possible common genetic basis between...

journal_title：Journal of biological rhythms

authors： Lankinen P,Forsman P

更新日期：2006-02-01 00:00:00

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：:Individuals of the shore crab Carcinus maenas were exposed to artificial cycles, applied in tidal antiphase, of pairs of the three major environmental variables that entrain circatidal rhythmicity in this species: salinity, temperature, and hydrostatic pressure. During entrainment, the observed locomotor activity patt...

journal_title：Journal of biological rhythms

authors： Reid DG,Naylor E

更新日期：1990-01-01 00:00:00

abstract：:The authors examined spatial working memory in the Morris water maze during the activity and rest periods of Wistar rats. Wheel-running activity was measured continuously as a marker of circadian phase. To minimize possible masking effects on performance, animals were placed in constant dim light the day before testin...

journal_title：Journal of biological rhythms

authors： Valentinuzzi VS,Menna-Barreto L,Xavier GF

更新日期：2004-08-01 00:00:00

abstract：:The light preferences of fruit flies were tested by 2 different means. First, flies were allowed to choose between different illuminations, and their favorite resting, grooming, and feeding places were determined with an infrared-sensitive camera. Second, the activity levels of the animals during their main daily acti...

journal_title：Journal of biological rhythms

authors： Rieger D,Fraunholz C,Popp J,Bichler D,Dittmann R,Helfrich-Förster C

更新日期：2007-10-01 00:00:00

abstract：:The synchronizing stimulus, its transduction site, and the afferent pathways responsible for feeding entrainment remain unknown. In fish, the role of the diet in the development of feeding anticipatory activity (FAA) is not well understood and fundamental questions on the mechanisms of feeding entrainment, such as the...

journal_title：Journal of biological rhythms

authors： Sánchez-Vázquez FJ,Aranda A,Madrid JA

更新日期：2001-02-01 00:00:00

abstract：:Circadian clocks drive daily rhythms of physiology and behavior in multiple organisms and synchronize these rhythms to environmental cycles of light and temperature. The basic mechanism of the clock consists of a transcription-translation feedback loop, in which key clock proteins negatively regulate their own transcr...

journal_title：Journal of biological rhythms

authors： Shakhmantsir I,Sehgal A

更新日期：2019-12-01 00:00:00

abstract：:A gradual adaptation to a shifted light-dark (LD) cycle is a key element of the circadian clock system and believed to be controlled by the central circadian pacemaker, the suprachiasmatic nucleus (SCN). Endocrine factors have a strong influence on the regulation of the circadian clock network and alter acute photic r...

journal_title：Journal of biological rhythms

authors： Pilorz V,Kolms B,Oster H

更新日期：2020-12-01 00:00:00

abstract：:Most of the anatomical and molecular substrates of the system that encodes changes in photoperiod in the duration of melatonin secretion, and the receptor molecules that read this signal, have been shown to be conserved in monkeys and humans, and the functions of this system appear to be intact from the level of the r...

journal_title：Journal of biological rhythms

authors： Wehr TA

更新日期：2001-08-01 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：:Numerous studies have used the classic van der Pol oscillator, which contains a cubic nonlinearity, to model the effect of light on the human circadian pacemaker. Jewett and Kronauer demonstrated that Aschoff's rule could be incorporated into van der Pol type models and used a van der Pol type oscillator with higher o...

journal_title：Journal of biological rhythms

authors： Forger DB,Jewett ME,Kronauer RE

更新日期：1999-12-01 00:00:00