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Febo M, Mahar R, Rodriguez NA, Buraima J, Pompilus M, Pinto AM, Grudny MM, Bruijnzeel AW, Merritt ME. Age-related differences in affective behaviors in mice: possible role of prefrontal cortical-hippocampal functional connectivity and metabolomic profiles. Front Aging Neurosci 2024; 16:1356086. [PMID: 38524115 PMCID: PMC10957556 DOI: 10.3389/fnagi.2024.1356086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/28/2024] [Indexed: 03/26/2024] Open
Abstract
Introduction The differential expression of emotional reactivity from early to late adulthood may involve maturation of prefrontal cortical responses to negative valence stimuli. In mice, age-related changes in affective behaviors have been reported, but the functional neural circuitry warrants further investigation. Methods We assessed age variations in affective behaviors and functional connectivity in male and female C57BL6/J mice. Mice aged 10, 30 and 60 weeks (wo) were tested over 8 weeks for open field activity, sucrose preference, social interactions, fear conditioning, and functional neuroimaging. Prefrontal cortical and hippocampal tissues were excised for metabolomics. Results Our results indicate that young and old mice differ significantly in affective behavioral, functional connectome and prefrontal cortical-hippocampal metabolome. Young mice show a greater responsivity to novel environmental and social stimuli compared to older mice. Conversely, late middle-aged mice (60wo group) display variable patterns of fear conditioning and during re-testing in a modified context. Functional connectivity between a temporal cortical/auditory cortex network and subregions of the anterior cingulate cortex and ventral hippocampus, and a greater network modularity and assortative mixing of nodes was stronger in young versus older adult mice. Metabolome analyses identified differences in several essential amino acids between 10wo mice and the other age groups. Discussion The results support differential expression of 'emotionality' across distinct stages of the mouse lifespan involving greater prefrontal-hippocampal connectivity and neurochemistry.
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Affiliation(s)
- Marcelo Febo
- Department of Psychiatry, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, United States
| | - Rohit Mahar
- Department of Chemistry, Hemvati Nandan Bahuguna Garhwal University (A Central University), Srinagar Garhwal, Uttarakhand, India
| | - Nicholas A. Rodriguez
- Department of Psychiatry, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, United States
| | - Joy Buraima
- Department of Psychiatry, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, United States
| | - Marjory Pompilus
- Department of Psychiatry, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, United States
| | - Aeja M. Pinto
- Department of Psychiatry, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, United States
| | - Matteo M. Grudny
- Department of Psychiatry, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, United States
| | - Adriaan W. Bruijnzeel
- Department of Psychiatry, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL, United States
| | - Matthew E. Merritt
- Department of Biochemistry and Molecular Biology, University of Florida College of Medicine, Gainesville, FL, United States
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Febo M, Mahar R, Rodriguez NA, Buraima J, Pompilus M, Pinto AM, Grudny MM, Bruijnzeel AW, Merritt ME. Age-Related Differences in Affective Behaviors in Mice: Possible Role of Prefrontal Cortical-Hippocampal Functional Connectivity and Metabolomic Profiles. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.11.13.566691. [PMID: 38014219 PMCID: PMC10680600 DOI: 10.1101/2023.11.13.566691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
The differential expression of emotional reactivity from early to late adulthood may involve maturation of prefrontal cortical responses to negative valence stimuli. In mice, age-related changes in affective behaviors have been reported, but the functional neural circuitry warrants further investigation. We assessed age variations in affective behaviors and functional connectivity in male and female C57BL6/J mice. Mice aged 10, 30 and 60 weeks (wo) were tested over 8 weeks for open field activity, sucrose preference, social interactions, fear conditioning, and functional neuroimaging. Prefrontal cortical and hippocampal tissues were excised for metabolomics. Our results indicate that young and old mice differ significantly in affective behavioral, functional connectome and prefrontal cortical-hippocampal metabolome. Young mice show a greater responsivity to novel environmental and social stimuli compared to older mice. Conversely, late middle-aged mice (60wo group) display variable patterns of fear conditioning and with re-testing with a modified context. Functional connectivity between a temporal cortical/auditory cortex network and subregions of the anterior cingulate cortex and ventral hippocampus, and a greater network modularity and assortative mixing of nodes was stronger in young versus older adult mice. Metabolome analyses identified differences in several essential amino acids between 10wo mice and the other age groups. The results support differential expression of 'emotionality' across distinct stages of the mouse lifespan involving greater prefrontal-hippocampal connectivity and neurochemistry.
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Moore SJ, Cazares VA, Temme SJ, Murphy GG. Age-related deficits in neuronal physiology and cognitive function are recapitulated in young mice overexpressing the L-type calcium channel, Ca V 1.3. Aging Cell 2023; 22:e13781. [PMID: 36703244 PMCID: PMC10014069 DOI: 10.1111/acel.13781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 12/21/2022] [Accepted: 12/30/2022] [Indexed: 01/28/2023] Open
Abstract
The calcium dysregulation hypothesis of brain aging posits that an age-related increase in neuronal calcium concentration is responsible for alterations in a variety of cellular processes that ultimately result in learning and memory deficits in aged individuals. We previously generated a novel transgenic mouse line, in which expression of the L-type voltage-gated calcium, CaV 1.3, is increased by ~50% over wild-type littermates. Here, we show that, in young mice, this increase is sufficient to drive changes in neuronal physiology and cognitive function similar to those observed in aged animals. Specifically, there is an increase in the magnitude of the postburst afterhyperpolarization, a deficit in spatial learning and memory (assessed by the Morris water maze), a deficit in recognition memory (assessed in novel object recognition), and an overgeneralization of fear to novel contexts (assessed by contextual fear conditioning). While overexpression of CaV 1.3 recapitulated these key aspects of brain aging, it did not produce alterations in action potential firing rates, basal synaptic communication, or spine number/density. Taken together, these results suggest that increased expression of CaV 1.3 in the aged brain is a crucial factor that acts in concert with age-related changes in other processes to produce the full complement of structural, functional, and behavioral outcomes that are characteristic of aged animals.
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Affiliation(s)
- Shannon J. Moore
- Michigan Neuroscience InstituteAnn ArborMichiganUSA
- Molecular & Integrative PhysiologyUniversity of MichiganAnn ArborMichiganUSA
| | - Victor A. Cazares
- Molecular & Integrative PhysiologyUniversity of MichiganAnn ArborMichiganUSA
- Department of PsychologyWilliams CollegeWilliamstownMassachusettsUSA
| | | | - Geoffrey G. Murphy
- Michigan Neuroscience InstituteAnn ArborMichiganUSA
- Molecular & Integrative PhysiologyUniversity of MichiganAnn ArborMichiganUSA
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Steiner KM, Jansen S, Adeishvili N, Hulst T, Ernst TM, Müller O, Wondzinski E, Göricke SL, Siebler M, Uengoer M, Timmann D. Extinction of cognitive associations is preserved in patients with cerebellar disease. Neurobiol Learn Mem 2020; 169:107185. [PMID: 32061996 DOI: 10.1016/j.nlm.2020.107185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 01/29/2020] [Accepted: 02/10/2020] [Indexed: 10/25/2022]
Abstract
In the present study extinction and renewal of cognitive associations were assessed in two experiments in participants with focal and degenerative cerebellar disease. Using a predictive learning task, participants had to learn by trial and error the relationships between food items and the occurrence of stomach trouble in a hypothetical patient. In the first experiment, focus was on renewal effects. Participants with chronic cerebellar stroke (n = 14; mean age 50.9 ± 12 years), participants with degenerative cerebellar disease (n = 16; mean age 58 ± 12 years), age-, sex-, and education matched controls (n = 20; mean age 53.7 ± 10.8 years) and young controls (n = 19; mean age 23.2 ± 2.7 years) were tested. Acquisition and extinction of food-stomach trouble associations took part in two different contexts (represented by restaurants). In a subsequent test phase, food stimuli were presented in both contexts and no feedback was given. This allowed testing for renewal of the initially acquired associations in the acquisition context. Acquisition and extinction learning were not significantly different between groups. Significant renewal effects were present in young controls only. In the second experiment, focus was on extinction. To control for age effects, 19 young participants with chronic surgical lesions of the cerebellum (mean age 25.6 ± 6.1 years), and 24 age-, sex- and education-matched healthy controls were tested. Acquisition and extinction of food-stomach trouble associations took part in the same context. In the extinction phase, the relationship with stomach trouble was reversed in some of the food items. Acquisition and extinction learning were not significantly different between groups. The main finding of the present study was preserved extinction of learned cognitive associations in participants with chronic cerebellar disease. Findings agree with previous observations in the literature that cognitive abnormalities are frequently absent or weak in adults with cerebellar disease. This does not exclude a contribution of the cerebellum to extinction of learned associations. For example, findings may be different in more challenging cognitive tasks, and in participants with acute cerebellar disease with no time for compensation.
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Affiliation(s)
- Katharina M Steiner
- Department of Neurology, Essen University Hospital, University of Duisburg-Essen, Essen, Germany.
| | - Sarah Jansen
- Department of Neurology, Essen University Hospital, University of Duisburg-Essen, Essen, Germany
| | - Nino Adeishvili
- Department of Neurology, Essen University Hospital, University of Duisburg-Essen, Essen, Germany
| | - Thomas Hulst
- Department of Neurology, Essen University Hospital, University of Duisburg-Essen, Essen, Germany
| | - Thomas M Ernst
- Department of Neurology, Essen University Hospital, University of Duisburg-Essen, Essen, Germany
| | - Oliver Müller
- Department of Neurosurgery, Essen University Hospital, University of Duisburg-Essen, Essen, Germany
| | - Elke Wondzinski
- Department of Neurology, MediClin Fachklinik Rhein/Ruhr, Essen, Germany
| | - Sophia L Göricke
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, Essen University Hospital, University of Duisburg-Essen, Germany
| | - Mario Siebler
- Department of Neurology, MediClin Fachklinik Rhein/Ruhr, Essen, Germany
| | - Metin Uengoer
- Department of Psychology, Philipps-Universität Marburg, Germany
| | - Dagmar Timmann
- Department of Neurology, Essen University Hospital, University of Duisburg-Essen, Essen, Germany
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Battaglia S, Garofalo S, di Pellegrino G. Context-dependent extinction of threat memories: influences of healthy aging. Sci Rep 2018; 8:12592. [PMID: 30135561 PMCID: PMC6105728 DOI: 10.1038/s41598-018-31000-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Accepted: 08/03/2018] [Indexed: 01/03/2023] Open
Abstract
Although a substantial progress has been made in recent years on understanding the processes mediating extinction of learned threat, little is known about the context-dependent extinction of threat memories in elderly individuals. We used a 2-day differential threat conditioning and extinction procedure to determine whether young and older adults differed in the contextual recall of conditioned responses after extinction. On Day 1, conditioned stimuli were paired with an aversive electric shock in a 'danger' context and then extinguished in a different 'safe' context. On Day 2, the extinguished stimulus was presented to assess extinction recall (safe context), and threat renewal (danger context). Physiological and verbal report measures of threat conditioning were collected throughout the experiment. Skin conductance response (SCR data revealed no significant differences between age groups during acquisition and extinction of threat conditioning on Day 1. On Day 2, however, older adults showed impaired recall of extinction memory, with increased SCR to the extinguished stimulus in the 'safe' context, and reduced ability to process context properly. In addition, there were no age group differences in fear ratings and contingency awareness, thus revealing that aging selectively impairs extinction memories as indexed by autonomic responses. These results reveal that aging affects the capacity to use context to modulate learned responses to threat, possibly due to changes in brain structures that enable context-dependent behaviour and are preferentially vulnerable during aging.
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Affiliation(s)
- Simone Battaglia
- Centre for Studies and Research in Cognitive Neuroscience, Department of Psychology, University of Bologna, Bologna, Italy
| | - Sara Garofalo
- Neurology Unit, IRCCS Istituto Neurologico Mediterraneo (INM) Neuromed, Pozzilli, Italy
| | - Giuseppe di Pellegrino
- Centre for Studies and Research in Cognitive Neuroscience, Department of Psychology, University of Bologna, Bologna, Italy.
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Bang E, Lee B, Park JO, Jang Y, Kim A, Kim S, Shin HS. The Improving Effect of HL271, a Chemical Derivative of Metformin, a Popular Drug for Type II Diabetes Mellitus, on Aging-induced Cognitive Decline. Exp Neurobiol 2018. [PMID: 29535569 PMCID: PMC5840461 DOI: 10.5607/en.2018.27.1.45] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
In recent years, as the aging population grows, aging-induced cognitive impairments including dementia and Alzheimer's disease (AD) have become the biggest challenges for global public health and social care. Therefore, the development of potential therapeutic drugs for aging-associated cognitive impairment is essential. Metabolic dysregulation has been considered to be a key factor that affects aging and dementia. Adenosine monophosphate (AMP)-activated protein kinase (AMPK) is a primary sensor of cellular energy states and regulates cellular energy metabolism. Metformin (1,1-dimethylbiguanide hydrochloride) is a well-known AMPK activator and has been widely prescribed for type 2 diabetes mellitus (T2DM). Since the incidence of T2DM and dementia increases with aging, metformin has been considered to be one of the most promising drugs to target dementia and its related disorders. To that end, here, we tested the efficacy of metformin and HL271, a novel metformin derivative, in aging-induced cognitive decline. Water (control), metformin (100 mg/kg) or HL271 (50 mg/kg) were orally administered to aged mice for two months; then, the mice were subjected to behavioral tests to measure their cognitive function, particularly their contextual, spatial and working memory. AMPK phosphorylation was also measured in the drug-treated mouse brains. Our results show that oral treatment with HL271 (50 mg/kg) but not metformin (100 mg/kg) improved cognitive decline in aged mice. AMPK activation was correlated with behavior recovery after aging-induced cognitive decline. Taken together, these results suggest that the newly synthesized AMPK activator, HL271, could be a potential therapeutic agent to treat age-related cognitive decline.
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Affiliation(s)
- Eunyoung Bang
- Center for Cognition and Sociality, Institute for Basic Science, Daejeon 34141, Korea.,Basic Science, IBS School, University of Science and Technology, Daejeon 34113, Korea
| | - Boyoung Lee
- Center for Cognition and Sociality, Institute for Basic Science, Daejeon 34141, Korea
| | - Joon-Oh Park
- Center for Neuroscience, Korea Institute of Science and Technology, Seoul 02792, Korea.,Division of Insect Pests, National Institute of Forest Science, Seoul 02455, Korea
| | - Yooncheol Jang
- Center for Cognition and Sociality, Institute for Basic Science, Daejeon 34141, Korea.,Center for Neuroscience, Korea Institute of Science and Technology, Seoul 02792, Korea
| | - Aekyong Kim
- ImmunoMet, Texas Medical Center, Houston, TX 77021, USA
| | - Sungwuk Kim
- ImmunoMet, Texas Medical Center, Houston, TX 77021, USA.,Hanall Biopharma Inc., Seoul 06170, Korea
| | - Hee-Sup Shin
- Center for Cognition and Sociality, Institute for Basic Science, Daejeon 34141, Korea.,Basic Science, IBS School, University of Science and Technology, Daejeon 34113, Korea
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Wang Y, Santerre M, Tempera I, Martin K, Mukerjee R, Sawaya BE. HIV-1 Vpr disrupts mitochondria axonal transport and accelerates neuronal aging. Neuropharmacology 2017; 117:364-375. [PMID: 28212984 PMCID: PMC5397298 DOI: 10.1016/j.neuropharm.2017.02.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 02/08/2017] [Accepted: 02/09/2017] [Indexed: 12/24/2022]
Abstract
Disruption of mitochondria axonal transport, essential for the maintenance of synaptic and neuronal integrity and function, has been identified in neurodegenerative diseases. Whether HIV-1 viral proteins affect mitochondria axonal transport is unknown, albeit HIV-associated neurocognitive disorders occur in around half of the patients living with HIV. Therefore, we sought to examine the effect of HIV-1 viral protein R (Vpr) on mitochondria axonal transport. Using mice primary neuronal cultures, we demonstrated that 4-day Vpr treatment reduced the ratio of moving mitochondria associated with (i) less energy (ATP) supply, (ii) reduction in Miro-1 and (iii) increase of α-synuclein which led to loss of microtubule stability as demonstrated by inconsecutive distribution of acetylated α-tubulin along the axons. Interestingly, the effect of Vpr on mitochondria axonal transport was partially restored in the presence of bongkrekic acid, a compound that negatively affected the Vpr-adenine nucleotide translocator (ANT) interaction and totally restored the ATP level in neurons. This indicated Vpr impaired mitochondria axonal transport partially related to its interaction with ANT. The above effect of Vpr was similar to the data obtained from hippocampal tissues isolated from 18-month-old aging mice compared to 5-month-old mice. In accord with previous clinical findings that HIV infection prematurely ages the brain and increases the susceptibility to HAND, we found that Vpr induced aging markers in neurons. Thus, we concluded that instead of causing cell death, low concentration of HIV-1 Vpr altered neuronal function related with inhibition of mitochondria axonal transport which might contribute to the accelerated neuronal aging.
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Affiliation(s)
- Ying Wang
- Molecular Studies of Neurodegenerative Diseases Lab, United States; Department of Neurology, The Fels Institute for Cancer Research & Molecular Biology, United States.
| | - Maryline Santerre
- Molecular Studies of Neurodegenerative Diseases Lab, United States; Department of Neurology, The Fels Institute for Cancer Research & Molecular Biology, United States
| | - Italo Tempera
- Department of Neurology, The Fels Institute for Cancer Research & Molecular Biology, United States
| | - Kayla Martin
- Department of Neurology, The Fels Institute for Cancer Research & Molecular Biology, United States
| | - Ruma Mukerjee
- Molecular Studies of Neurodegenerative Diseases Lab, United States; Department of Neurology, The Fels Institute for Cancer Research & Molecular Biology, United States
| | - Bassel E Sawaya
- Molecular Studies of Neurodegenerative Diseases Lab, United States; Department of Neurology, The Fels Institute for Cancer Research & Molecular Biology, United States; Temple University School of Medicine, Philadelphia, PA 19140, United States.
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Abstract
Whereas fear memories are rapidly acquired and enduring over time, extinction memories are slow to form and are susceptible to disruption. Consequently, behavioral therapies that involve extinction learning (e.g., exposure therapy) often produce only temporary suppression of fear and anxiety. This review focuses on the factors that are known to influence the relapse of extinguished fear. Several phenomena associated with the return of fear after extinction are discussed, including renewal, spontaneous recovery, reacquisition, and reinstatement. Additionally, this review describes recent work, which has focused on the role of psychological stress in the relapse of extinguished fear. Recent developments in behavioral and pharmacological research are examined in light of treatment of pathological fear in humans.
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Wiescholleck V, Emma André MA, Manahan-Vaughan D. Early age-dependent impairments of context-dependent extinction learning, object recognition, and object-place learning occur in rats. Hippocampus 2013; 24:270-9. [PMID: 24132946 DOI: 10.1002/hipo.22220] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/04/2013] [Indexed: 01/23/2023]
Abstract
The hippocampus is vulnerable to age-dependent memory decline. Multiple forms of memory depend on adequate hippocampal function. Extinction learning comprises active inhibition of no longer relevant learned information concurrent with suppression of a previously learned reaction. It is highly dependent on context, and evidence exists that it requires hippocampal activation. In this study, we addressed whether context-based extinction as well as hippocampus-dependent tasks, such as object recognition and object-place recognition, are equally affected by moderate aging. Young (7-8 week old) and older (7-8 month old) Wistar rats were used. For the extinction study, animals learned that a particular floor context indicated that they should turn into one specific arm (e.g., left) to receive a food reward. On the day after reaching the learning criterion of 80% correct choices, the floor context was changed, no reward was given and animals were expected to extinguish the learned response. Both, young and older rats managed this first extinction trial in the new context with older rats showing a faster extinction performance. One day later, animals were returned to the T-maze with the original floor context and renewal effects were assessed. In this case, only young but not older rats showed the expected renewal effect (lower extinction ratio as compared to the day before). To assess general memory abilities, animals were tested in the standard object recognition and object-place memory tasks. Evaluations were made at 5 min, 1 h and 7 day intervals. Object recognition memory was poor at short-term and intermediate time-points in older but not young rats. Object-place memory performance was unaffected at 5 min, but impaired at 1 h in older but not young rats. Both groups were impaired at 7 days. These findings support that not only aspects of general memory, but also context-dependent extinction learning, are affected by moderate aging. This may reflect less flexibility in revising hard-wired knowledge or reduced adaptability to new learning challenges.
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Yeoman M, Scutt G, Faragher R. Insights into CNS ageing from animal models of senescence. Nat Rev Neurosci 2012; 13:435-45. [PMID: 22595787 DOI: 10.1038/nrn3230] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
In recent years, novel model systems have made significant contributions to our understanding of the processes that control the ageing of whole organisms. However, there are limited data to show that the mechanisms that gerontologists have identified as having a role in organismal ageing contribute significantly to the ageing of the central nervous system. Two recent discoveries illustrate this particularly well. The first is the consistent failure of researchers to demonstrate a simple relationship between organismal ageing and oxidative stress--a mechanism often assumed to have a primary role in brain ageing. The second is the demonstration that senescent cells play a causal part in organismal ageing but remain essentially unstudied in a CNS context. We argue that the animal models now available (including rodents, flies, molluscs and worms), if properly applied, will allow a paradigm shift in our current understanding of the normal processes of brain ageing.
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Affiliation(s)
- Mark Yeoman
- School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton, Brighton, East Sussex BN2 4GJ, UK
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