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Sheehan PW, Musiek ES. Evaluating Circadian Dysfunction in Mouse Models of Alzheimer's Disease: Where Do We Stand? Front Neurosci 2020; 14:703. [PMID: 32733196 PMCID: PMC7358444 DOI: 10.3389/fnins.2020.00703] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 06/10/2020] [Indexed: 12/11/2022] Open
Abstract
Circadian dysfunction has been described in patients with symptomatic Alzheimer’s disease (AD), as well as in presymptomatic phases of the disease. Modeling this circadian dysfunction in mouse models would provide an optimal platform for understanding mechanisms and developing therapies. While numerous studies have examined behavioral circadian function, and in some cases clock gene oscillation, in mouse models of AD, the results are variable and inconsistent across models, ages, and conditions. Ultimately, circadian changes observed in APP/PS1 models are inconsistent across studies and do not always replicate circadian phenotypes observed in human AD. Other models, including the 3xTG mouse, tau transgenic lines, and the accelerated aging SAMP8 line, show circadian phenotypes more consistent with human AD, although the literature is either inconsistent or minimal. We summarize these data and provide some recommendations to improve and standardize future studies of circadian function in AD mouse models.
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Affiliation(s)
- Patrick W Sheehan
- Department of Neurology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - Erik S Musiek
- Department of Neurology, Washington University School of Medicine in St. Louis, St. Louis, MO, United States.,Knight Alzheimer's Disease Research Center, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
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Stowie AC, Glass JD. Longitudinal Study of Changes in Daily Activity Rhythms over the Lifespan in Individual Male and Female C57BL/6J Mice. J Biol Rhythms 2015; 30:563-8. [PMID: 26271539 DOI: 10.1177/0748730415598023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Mice are used widely for research on circadian, molecular and other processes; however, little is known of circadian age- and, particularly, sex-related changes that occur over the entire lifespan of this species. To shed light on this question, the authors used a longitudinal design for the first continuous actogram measurements of general circadian locomotor activity rhythms unperturbed by photocycle or other experimental manipulations over the lifespan in male and female C57BL/6J mice. These weaning-to-death actograms are the most inclusive undertaken to date. Comparisons of circadian parameters (phase angle of entrainment, length of daily activity, bout length/intensity) were made among 4 life stages (adolescence, adult, middle age, and senescence). The present data reveal the progressive and sex-related changes in general locomotor activity pattern that occur throughout the lifespan. From the overall perspective of this study, there appears to be a need for wider age and sex representation in circadian research.
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Affiliation(s)
- Adam C Stowie
- Department of Biological Sciences, Kent State University, Kent, Ohio, USA
| | - J David Glass
- Department of Biological Sciences, Kent State University, Kent, Ohio, USA
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Sanchez-Roige S, Lalanza JF, Alvarez-López MJ, Cosín-Tomás M, Griñan-Ferré C, Pallàs M, Kaliman P, Escorihuela RM. Long-term wheel running changes on sensorimotor activity and skeletal muscle in male and female mice of accelerated senescence. AGE (DORDRECHT, NETHERLANDS) 2014; 36:9697. [PMID: 25129573 PMCID: PMC4159468 DOI: 10.1007/s11357-014-9697-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 07/27/2014] [Indexed: 06/03/2023]
Abstract
The senescence-accelerated mouse prone 8 (SAMP8) is considered a useful non-transgenic model for studying aspects of aging. Using SAM resistant 1 (SAMR1) as controls, the long-term effects of wheel running on skeletal muscle adaptations and behavioral traits were evaluated in senescent (P8) and resistant (R1) male and female mice. Long-term wheel running (WR) led to increases in locomotor activity, benefits in sensorimotor function, and changes in body weight in a gender-dependent manner. WR increased body weight and baseline levels of locomotor activity in female mice and improved balance and strength in male mice, compared to sedentary-control mice. WR resulted in key metabolic adaptations in skeletal muscle, associated with an increased activity of the sirtuin 1-AMP-activated protein kinase (AMPK)-PGC-1 alpha axis and changes in vascular endothelial growth factor A (Vegfa), glucose transporter type 4 (Glut4), and Cluster of Differentiation 36 (Cd36) gene expression. Overall, our data indicate that activity, balance, and strength decrease with age and that long-term WR may significantly improve the motor function in a mouse model of senescence in a gender-dependent manner.
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Affiliation(s)
| | - Jaume F. Lalanza
- />Institut de Neurociències, Departament de Psiquiatria i Medicina Legal, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - María Jesús Alvarez-López
- />Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona, Nucli Universitari de Pedralbes, 08028 Barcelona, Spain
| | - Marta Cosín-Tomás
- />Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona, Nucli Universitari de Pedralbes, 08028 Barcelona, Spain
| | - Christian Griñan-Ferré
- />Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona, Nucli Universitari de Pedralbes, 08028 Barcelona, Spain
| | - Merce Pallàs
- />Unitat de Farmacologia i Farmacognòsia, Facultat de Farmàcia, Institut de Biomedicina (IBUB), Universitat de Barcelona, Nucli Universitari de Pedralbes, 08028 Barcelona, Spain
- />Centros de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Perla Kaliman
- />Instituto de Investigaciones Biomédicas August Pi i Sunyer (IDIBAPS), Villarroel 170, 08036 Barcelona, Spain
| | - Rosa M. Escorihuela
- />Institut de Neurociències, Departament de Psiquiatria i Medicina Legal, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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Gorman MR, Yellon S. Lifespan daily locomotor activity rhythms in a mouse model of amyloid-induced neuropathology. Chronobiol Int 2010; 27:1159-77. [PMID: 20653448 DOI: 10.3109/07420528.2010.485711] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Using a rodent model for neuropathology induced by human amyloid precursor protein, the present study tested the hypothesis that 24 h rest/activity rhythms deteriorate with age. A lifespan of rest/activity patterns was studied in transgenic Tg2576 mice and wild-type controls. Classic indices of circadian timekeeping, including onsets, offsets, and the duration of nighttime activity, were stable throughout the 96-week study. Analyses of ultradian bout activity revealed significant genotype and age-related changes in the duration and intensity of activity bouts, as well as amplitude of the 24 h rhythm. Tg2576 mice had more total activity counts, fewer bouts/24 h, more counts/bout, and longer bout time than wild-type controls. Amyloid deposits and plaques were solely found in specific cortex regions in aged postmortem Tg2576 mice, but were not evident in the hypothalamus or suprachiasmatic nucleus; this neuropathology was absent from brains of wild-type controls. These findings suggest that amyloidosis of the Tg2576 mouse exerts little influence on timing of locomotor activity in the circadian domain but significantly alters the temporal structure of ultradian activity.
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Affiliation(s)
- Michael R Gorman
- Department of Psychology and Center for Chronobiology, University of California, San Diego, La Jolla, California, USA
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Craig LA, McDonald RJ. Chronic disruption of circadian rhythms impairs hippocampal memory in the rat. Brain Res Bull 2008; 76:141-51. [DOI: 10.1016/j.brainresbull.2008.02.013] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2007] [Revised: 01/25/2008] [Accepted: 02/11/2008] [Indexed: 10/22/2022]
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Pang KCH, Miller JP, Fortress A, McAuley JD. Age-related disruptions of circadian rhythm and memory in the senescence-accelerated mouse (SAMP8). AGE (DORDRECHT, NETHERLANDS) 2006; 28:283-296. [PMID: 22253495 PMCID: PMC3259149 DOI: 10.1007/s11357-006-9013-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2005] [Revised: 07/05/2006] [Accepted: 08/10/2006] [Indexed: 05/31/2023]
Abstract
Common complaints of the elderly involve impaired cognitive abilities, such as loss of memory and inability to attend. Although much research has been devoted to these cognitive impairments, other factors such as disrupted sleep patterns and increased daytime drowsiness may contribute indirectly to impaired cognitive abilities. Disrupted sleep-wake cycles may be the result of age-related changes to the internal (circadian) clock. In this article, we review recent research on aging and circadian rhythms with a focus on the senescence-accelerated mouse (SAM) as a model of aging. We explore some of the neurobiological mechanisms that appear to be responsible for our aging clock, and consider implications of this work for age-related changes in cognition.
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Affiliation(s)
- Kevin C. H. Pang
- Department of Psychology, J. P. Scott Center for Neuroscience, Mind, & Behavior, Bowling Green State University, Bowling Green, OH 43403 USA
- Stress & Motivated Behavior Institute, NeuroBehavioral Research Laboratory, VA Medical Center, 385 Tremont Avenue, Mailstop 129, East Orange, NJ 07018 USA
| | - Jonathan P. Miller
- Department of Psychology, J. P. Scott Center for Neuroscience, Mind, & Behavior, Bowling Green State University, Bowling Green, OH 43403 USA
| | - Ashley Fortress
- Department of Psychology, J. P. Scott Center for Neuroscience, Mind, & Behavior, Bowling Green State University, Bowling Green, OH 43403 USA
| | - J. Devin McAuley
- Department of Psychology, J. P. Scott Center for Neuroscience, Mind, & Behavior, Bowling Green State University, Bowling Green, OH 43403 USA
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Miller JP, McAuley JD, Pang KCH. Spontaneous fos expression in the suprachiasmatic nucleus of young and old mice. Neurobiol Aging 2004; 26:1107-15. [PMID: 15748791 DOI: 10.1016/j.neurobiolaging.2004.08.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2003] [Revised: 08/26/2004] [Accepted: 08/27/2004] [Indexed: 11/27/2022]
Abstract
The senescence-accelerated mouse (SAMP8) is an animal model of aging that displays an array of circadian rhythm disruptions as early as 7 months of age. The present study explored the physiological basis for age-related changes in circadian rhythms by measuring c-Fos immunostaining. Cellular activity in the SCN "core" and "shell" was examined for 2-, 7-, and 12-month-old SAMP8 at circadian times (CTs) 2 and 14. Consistent with previous studies in rats, we observed higher levels of cellular activity at CT2 than at CT14, and higher levels of activity in the "shell" than in the "core" of the SCN. However, there was no effect of age on the pattern of cellular activity in either the "core" or the "shell" of the SCN. These results are discussed in the context of current research on spontaneous and light-induced c-Fos expression in the SCN of rodents.
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Affiliation(s)
- Jonathan P Miller
- J.P. Scott Center for Neuroscience, Mind, and Behavior, Department of Psychology, Bowling Green State University, Bowling Green, OH 43403, USA
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