Circadian rhythmicity of vasopressin levels in the cerebrospinal fluid of suprachiasmatic nucleus-lesioned and -grafted rats.

abstract：:Circadian rhythms are programmed by the suprachiasmatic nucleus (SCN), which relies on neuropeptide signaling to maintain daily timekeeping. Vasoactive intestinal polypeptide (VIP) is critical for SCN function, but the precise role of VIP neurons in SCN circuits is not fully established. To interrogate their contribut...

journal_title：Journal of biological rhythms

authors： Joye DAM,Rohr KE,Keller D,Inda T,Telega A,Pancholi H,Carmona-Alcocer V,Evans JA

更新日期：2020-08-01 00:00:00

abstract：:The classical power spectrum, computed in the frequency domain, outranks traditionally used periodograms derived in the time domain (such as the chi2 periodogram) regarding the search for biological rhythms. Unfortunately, classical power spectral analysis is not possible with unequally spaced data (e.g., time series ...

journal_title：Journal of biological rhythms

authors： Van Dongen HP,Olofsen E,VanHartevelt JH,Kruyt EW

更新日期：1999-12-01 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：:Casein kinase 1ε (CK1ε) performs key phosphorylation reactions in the circadian clock mechanism that determine period. We show that the central clock protein PERIOD2 (PER2) not only acts as a transcriptional repressor but also inhibits the autoinactivation of CK1ε, thereby promoting CK1ε activity. Moreover, PER2 recip...

journal_title：Journal of biological rhythms

authors： Qin X,Mori T,Zhang Y,Johnson CH

更新日期：2015-06-01 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：:DEC1 and DEC2-basic helix-loop-helix transcription factors-exhibit a circadian expression in the suprachiasmatic nucleus and other peripheral tissues and seem to play roles in regulating the mammalian circadian rhythm by suppressing the CLOCK/BMAL1-activated promoters of Per1, Dec1, and Dec2. The authors present data ...

journal_title：Journal of biological rhythms

authors： Noshiro M,Furukawa M,Honma S,Kawamoto T,Hamada T,Honma K,Kato Y

更新日期：2005-10-01 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：: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：:In isolated slices of hypothalamus, suprachiasmatic nucleus (SCN) neurons were recorded intracellularly. Blockade of Ca++ channels increased spike duration, eliminating an early component of the afterhyperpolarization (AHP) that followed evoked spikes. The duration and reversal potential of AHPs were, however, unaffec...

journal_title：Journal of biological rhythms

authors： Thomson AM,West DC

更新日期：1990-04-01 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：:The hematologic system performs a number of essential functions, including oxygen transport, the execution of the immune response against tumor cells and invading pathogens, and hemostasis (blood clotting). These roles are performed by erythrocytes (red blood cells), leukocytes (white blood cells), and thrombocytes (p...

journal_title：Journal of biological rhythms

authors： Pritchett D,Reddy AB

更新日期：2015-10-01 00:00:00

abstract：:The suprachiasmatic nucleus (SCN) drives circadian rhythms in locomotion through coupled, single-cell oscillations. Global genetic deletion of the neuropeptide Vip or its receptor Vipr2 results in profound deficits in daily synchrony among SCN cells and daily rhythms in locomotor behavior and glucocorticoid secretion....

journal_title：Journal of biological rhythms

authors： Mazuski C,Chen SP,Herzog ED

更新日期：2020-10-01 00:00:00

abstract：:We investigated the extent to which photoperiodic fluctuations synchronize annual thyroid and gonadal rhythmicity in edible dormice. The effects of different daylength manipulations (LD 4:20, LD 6:18, LD 18:6, LD 20:4) were examined during the two critical ascending and regressive phases of the annual plasma testoster...

journal_title：Journal of biological rhythms

authors： Jallageas M,Mas N,Nouguier-Soulé J

更新日期：1991-01-01 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：:The circadian clock plays an important role in adaptation in time and space by synchronizing changes in physiological, developmental, and behavioral traits of organisms with daily and seasonal changes in their environment. We have studied some features of the circadian activity and clock organization in a northern Dro...

journal_title：Journal of biological rhythms

authors： Kauranen H,Menegazzi P,Costa R,Helfrich-Förster C,Kankainen A,Hoikkala A

更新日期：2012-10-01 00:00:00

abstract：:Rhodopsin 7 ( Rh7), a new invertebrate Rhodopsin gene, was discovered in the genome of Drosophila melanogaster in 2000, but its function has remained elusive. We generated an Rh7 null mutant ( Rh70) by P element-mediated mutagenesis and found that an absence of Rh7 had significant effects on fly activity patterns duri...

journal_title：Journal of biological rhythms

authors： Kistenpfennig C,Grebler R,Ogueta M,Hermann-Luibl C,Schlichting M,Stanewsky R,Senthilan PR,Helfrich-Förster C

更新日期：2017-10-01 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：:From the mathematical study of simple models for circadian rhythm, the authors identified a clear effect of saturation in the enzyme kinetics on the promotion or suppression of a sustained oscillation. In the models, a clock gene (per gene) is transcribed to produce mRNAs, which are translated to produce proteins in t...

journal_title：Journal of biological rhythms

authors： Kurosawa G,Iwasa Y

更新日期：2002-12-01 00:00:00

abstract：:Whether the circatidal rhythm is generated by a machinery common to the circadian clock is one of the important and interesting questions in chronobiology. The mangrove cricket Apteronemobius asahinai shows a circatidal rhythm generating active and inactive phases and a circadian rhythm modifying the circatidal rhythm...

journal_title：Journal of biological rhythms

authors： Takekata H,Numata H,Shiga S

更新日期：2014-02-01 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 possibility that feeding may act as a zeitgeber has been investigated in captive Svalbard ptarmigan by recording feeding or food-searching activity (FA) in birds given periodic access to food (PAF) under light-dark (LD) cycles or in continuous bright (LL) or dim light (DD) conditions. Except during LL, anticipator...

journal_title：Journal of biological rhythms

authors： Reierth E,Stokkan KA

更新日期：1998-10-01 00:00:00

abstract：:The adjustment of hamsters to advanced light-dark (LD) cycles can be greatly accelerated by scheduling a single 3-hr bout of extra activity in a novel running wheel, starting about 7 hr before the time when the animals become active in the preceding LD cycle. The present experiments were designed to provide stronger e...

journal_title：Journal of biological rhythms

authors： Mrosovsky N

更新日期：1989-10-01 00:00:00

abstract：:Seasonal changes in numerous aspects of mammalian immune function arise as a result of the annual variation in environmental day length (photoperiod), but it is not known if absolute photoperiod or relative change in photoperiod drives these changes. This experiment tested the hypothesis that an individual's history o...

journal_title：Journal of biological rhythms

authors： Prendergast BJ,Pyter LM

更新日期：2009-12-01 00:00:00

abstract：:Endogenous circadian rhythms are involved in various photoperiodic responses of birds. Investigations involving the mechanisms of photoperiodic time measurement in birds have been confined mainly to temperate zone species using males exclusively. Due to the paucity of experimental evidence on subtropical birds that ha...

journal_title：Journal of biological rhythms

authors： Ravikumar G,Senthilkumaran B,Tewary PD,Goel AK

更新日期：1995-12-01 00:00:00

abstract：:On the southern Iberian Peninsula, the seasonal life history of the large white butterfly, Pieris brassicae, comprises 2 different photoperiodically induced developmental arrests: a hibernation diapause at photophases < 11 h and an estivation diapause at photophases > 14 h. At intermediate photophases (12 h to 13 h), ...

journal_title：Journal of biological rhythms

authors： Spieth HR,Xue F,Strau K

更新日期：2004-12-01 00:00:00

abstract：:African sleeping sickness is characterized by alterations in rhythmic functions. It is not known if the disease affects the expression of clock genes, which are the molecular basis for rhythm generation. We used a chronic rat model of experimental sleeping sickness, caused by the extracellular parasite Trypanosoma bru...

journal_title：Journal of biological rhythms

authors： Lundkvist GB,Sellix MT,Nygård M,Davis E,Straume M,Kristensson K,Block GD

更新日期：2010-04-01 00:00:00

abstract：:The mammalian endogenous circadian clock, the suprachiasmatic nuclei, receives environmental inputs, namely the light-dark cycle, through photopigments located in the eye and from melanopsin-expressing retinal ganglion cells. The authors investigated the influence of light wavelength and intensity on the synchronizati...

journal_title：Journal of biological rhythms

authors： Perret M,Gomez D,Barbosa A,Aujard F,Théry M

更新日期：2010-06-01 00:00:00

abstract：:A 12-hr dark period, at a temperature high enough to permit time measurement to occur, is necessary for maximal induction of larval diapause in the European corn borer, Ostrinia nubilalis. In the present study, induction of diapause only occurred in a periodic environment. This was in the form of certain (1) light-dar...

journal_title：Journal of biological rhythms

authors： Skopik SD,Cain W,Patel NG,Newswanger DL

更新日期：1986-07-01 00:00:00

abstract：:Surgical isolation of the suprachiasmatic nuclei (SCN) within a hypothalamic island is reported to produce loss of circadian rhythmicity. The results have been interpreted to indicate that SCN efferents are necessary for the expression of circadian rhythms. It is not clear, however, whether the loss of circadian rhyth...

journal_title：Journal of biological rhythms

authors： Hakim H,DeBernardo AP,Silver R

更新日期：1991-07-01 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