scholarly journals Effects of Cage Position and Light Transmission on Home Cage Activity and Circadian Entrainment in Mice

2022 ◽  
Vol 15 ◽  
Author(s):  
Laura C. E. Steel ◽  
Selma Tir ◽  
Shu K. E. Tam ◽  
James N. Bussell ◽  
Manuel Spitschan ◽  
...  
Keyword(s):  
Light Intensity ◽  
Home Cage ◽  
Light Transmission ◽  
Activity Levels ◽  
Circadian Activity ◽  
Light Spectrum ◽  
Lighting Conditions ◽  
Cage Activity ◽  
Room Design ◽  
Home Cage Activity

Light is known to exert powerful effects on behavior and physiology, including upon the amount and distribution of activity across the day/night cycle. Here we use home cage activity monitoring to measure the effect of differences in home cage light spectrum and intensity on key circadian activity parameters in mice. Due to the relative positioning of any individually ventilated cage (IVC) with regard to the animal facility lighting, notable differences in light intensity occur across the IVC rack. Although all mice were found to be entrained, significant differences in the timing of activity onset and differences in activity levels were found between mice housed in standard versus red filtering cages. Furthermore, by calculating the effective irradiance based upon the known mouse photopigments, a significant relationship between light intensity and key circadian parameters are shown. Perhaps unsurprisingly given the important role of the circadian photopigment melanopsin in circadian entrainment, melanopic illuminance is shown to correlate more strongly with key circadian activity parameters than photopic lux. Collectively, our results suggest that differences in light intensity may reflect an uncharacterized source of variation in laboratory rodent research, with potential consequences for reproducibility. Room design and layout vary within and between facilities, and caging design and lighting location relative to cage position can be highly variable. We suggest that cage position should be factored into experimental design, and wherever possible, experimental lighting conditions should be characterized as a way of accounting for this source of variation.

scholarly journals Impulsivity and home-cage activity are decreased by lentivirus-mediated silencing of serotonin transporter in the rat hippocampus

2013 ◽  
Vol 548 ◽  
pp. 38-43 ◽  
Author(s):  
Francesca Zoratto ◽  
Amanda L. Tringle ◽  
Giancarlo Bellenchi ◽  
Luisa Speranza ◽  
Domenica Travaglini ◽  
...  
Keyword(s):  
Serotonin Transporter ◽  
Home Cage ◽  
Rat Hippocampus ◽  
Cage Activity ◽  
Home Cage Activity

scholarly journals Influence of mouse strain, infective dose and larval burden in the brain on activity in Toxocara-infected mice

2001 ◽  
Vol 75 (1) ◽  
pp. 23-32 ◽  
Author(s):  
D.M. Cox ◽  
C.V. Holland
Keyword(s):  
Mouse Strain ◽  
Post Infection ◽  
Home Cage ◽  
Brain Activity ◽  
Toxocara Canis ◽  
Cage Activity ◽  
Home Cage Activity ◽  
The Brain ◽  
Larval Recovery ◽  
Larval Burden

Outbred LACA mice and inbred NIH mice were administered low (100 ova), medium (1000 ova), high (3000 ova) and trickle (4×250 ova) doses ofToxocara canisova and the effect of infection on activity was examined with respect to: (i) the dose of ova administered and (ii) the number of larvae recovered from the brain. Larval recovery from the brain was significantly reduced in NIH mice compared to LACA mice for the 1000, 3000 and trickle doses. Mice from each strain were divided into larval intensity groupings based upon the number of larvae recovered from their brain. Activity for each mouse was measured pre- and post-infection by observing its behaviour in the home cage. Activity was assessed by monitoring six different independent categories of murine behaviour – ambulation, grooming, rearing, digging, climbing and immobility. Within each behavioural category, the duration of time spent at each behaviour per mouse within one thousandth of a second, the number of short bouts performed and the number of long bouts of behaviour performed were recorded over a 20 min period. Activity of LACA and NIH mice differed prior to infection. LACA mice spent more time immobile compared to NIH mice, which ambulated and climbed more. Variations in activity were also observed between groups of mice prior to infection. The effect of infection differed by strain, by dose and by larval intensity. Post-infection LACA mice became more immobile and ambulated less. NIH mice showed reduced immobility, but while ambulation decreased digging and climbing increased post-infection. Short bouts of activity remained unchanged among LACA mice post-infection but showed an increase for some behaviours in NIH mice.

Home cage activity and behavioral performance in inbred and hybrid mice

2002 ◽  
Vol 136 (2) ◽  
pp. 555-569 ◽  
Author(s):  
Xiangdong Tang ◽  
Stuart M Orchard ◽  
Larry D Sanford
Keyword(s):  
Home Cage ◽  
Behavioral Performance ◽  
Cage Activity ◽  
Home Cage Activity ◽  
Hybrid Mice

Genetic study of multigenic factors related to strain difference of temporal pattern in mouse home-cage activity

2011 ◽  
Vol 71 ◽  
pp. e166
Author(s):  
Tatsuhiko Goto ◽  
Ayako Ishii ◽  
Akinori Nishi ◽  
Aki Takahashi ◽  
Toshihiko Shiroishi ◽  
...  
Keyword(s):  
Genetic Study ◽  
Temporal Pattern ◽  
Home Cage ◽  
Strain Difference ◽  
Cage Activity ◽  
Home Cage Activity

scholarly journals Home-cage activity in heterogeneous stock (HS) mice as a model of baseline activity

2002 ◽  
Vol 1 (3) ◽  
pp. 166-173 ◽  
Author(s):  
J. Mill ◽  
M. J. Galsworthy ◽  
J. L. Paya-Cano ◽  
F. Sluyter ◽  
L. C. Schalkwyk ◽  
...  
Keyword(s):  
Home Cage ◽  
Heterogeneous Stock ◽  
Cage Activity ◽  
Baseline Activity ◽  
Home Cage Activity

scholarly journals Chronic Stimulation of Arcuate Kiss1 Neurons Decreases Bone Mass in Female Mice

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. A232-A232
Author(s):  
Ruben Rodriguez ◽  
Candice B Herber ◽  
William C Krause ◽  
Holly A Ingraham
Keyword(s):  
Bone Mass ◽  
Home Cage ◽  
Designer Drugs ◽  
Reproductive Capacity ◽  
Estrogen Signaling ◽  
Female Mice ◽  
Cage Activity ◽  
Increased Risk ◽  
Chronic Activation ◽  
Home Cage Activity

Abstract Loss of peripheral estrogen in postmenopausal women is often associated with decreased physical activity and loss of bone mass, leading to an increased risk of metabolic diseases, osteoporosis, and skeletal fragility. While it is well-established that loss of peripheral estrogen signaling results in bone loss, we previously found that eliminating central estrogen signaling paradoxically results in an unexpected massive increase in bone mass only in female mice. Specifically, deletion of estrogen receptor alpha (ERα) signaling in kisspeptin 1 (Kiss1) expressing neurons of the arcuate nucleus (ARCKiss1) increases bone mass at the expense of reproduction in female mice. Currently, the mechanisms and the neurocircuits that modulate these unexpected responses are unknown. Here, to begin addressing these questions, we asked if changing the neuronal output of ARCKiss1 neurons using chemogenetic manipulation of ARCKiss1 neurons might also alter bone mass and locomotion in female mice. To do this, we delivered stimulatory (AAV2-hM3Dq-mCherry) designer receptors exclusively activated by designer drugs (DREADDs) to the ARC of wild type and Kiss1-Cre+ (Kiss1-CrehM3q-DREADDs) female mice and asked if chronic activation of ARCKiss1 neurons might alter bone mass as analyzed by standard ex-vivo µCT imaging. Clozapine N-oxide (CNO) was delivered for 22 days (0.1 mg/mL). We also leveraged the ANY-Maze system to assess home cage activity over an extensive 96-hour period. Acute activation of ARCKiss1 tended to decrease home cage activity by nearly 40% in Kiss1-CrehM3q-DREADDs mice during the dark period compared to WT females. Interestingly, chronic activation of ARCKiss1 neurons significantly lowered trabecular bone volume by nearly 30%. Current studies are underway to ask if inhibiting ARCKiss1 neurons results in increased bone mass. Our findings collectively suggest that the neuronal activity of ARCKiss1 neurons is sufficient to shift energy allocation away from locomotion and bone-building to maximize reproductive capacity. We speculate that the widely used SERM in breast cancer treatment, Tamoxifen, might exert its bone sparing effect by silencing ARCKiss1 neurons.

scholarly journals Major oscillations in spontaneous home-cage activity with an infraradian periodicity in C57Bl/6 mice housed under constant conditions

2020 ◽  
Author(s):  
K. Pernold ◽  
E. Rullman ◽  
B. Ulfhake
Keyword(s):  
Spontaneous Activity ◽  
Feeding Behaviour ◽  
Home Cage ◽  
Light Cycle ◽  
Dark Light ◽  
Cage Activity ◽  
Free Running ◽  
The Mean ◽  
Home Cage Activity

AbstractUsing 14-20 months of cumulative 24/7 home-cage activity recorded with a non-intrusive technique and a data driven analytical approach, we here provide evidence for the existence of a circannual oscillation (1-2 SD of the mean, on average 65% higher during peak of highs than lows; P=7E-50) in spontaneous activity of male and female C57BL/6 mice held under constant barrier conditions (dark-light cycle 12/12 h (DL), temperature 21±1°C, humidity 40-60%). The periodicity of the season-like oscillation is in the range of 2-4 months (on average 97 days across cohorts of cages) and off-sets also responses to environmental stimuli but does not significantly alter the preference for activity during the dark hours of this nocturnal mouse strain (P=0.11 difference between highs and lows).The significance of this hitherto not recognized slow rhythmic alteration in spontaneous activity is further substantiated by its co-variation with the feeding behaviour of the mice. The absence of coordination within and between cohorts of cages or synchronization to the seasons of the year, suggests that the oscillation of in-cage activity and behavioural responses is generated by a free-running intrinsic oscillator devoid of synchronization with an out-of-cage environmental time-keeper. Since the variation over time has such a magnitude and correlate with the feeding behaviour it is likely that it will impact a range of long term experiments conducted on laboratory mice if left unrecognized.

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