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Krivinko JM, Koppel J, Savonenko A, Sweet RA. Animal Models of Psychosis in Alzheimer Disease. Am J Geriatr Psychiatry 2020; 28:1-19. [PMID: 31278012 PMCID: PMC6858948 DOI: 10.1016/j.jagp.2019.05.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/29/2019] [Accepted: 05/13/2019] [Indexed: 12/13/2022]
Abstract
Psychosis in Alzheimer Disease (AD) represents a distinct clinicopathologic variant associated with increased cognitive and functional morbidity and an accelerated disease course. To date, extant treatments offer modest benefits with significant risks. The development of new pharmacologic treatments for psychosis in AD would be facilitated by validated preclinical models with which to test candidate interventions. The current review provides a brief summary of the process of validating animal models of human disease together with a critical analysis of the challenges posed in attempting to apply those standards to AD-related behavioral models. An overview of phenotypic analogues of human cognitive and behavioral impairments, with an emphasis on those relevant to psychosis, in AD-related mouse models is provided, followed by an update on recent progress in efforts to translate findings in the pathophysiology of psychotic AD into novel models. Finally, some future directions are suggested to expand the catalogue of psychosis-relevant phenotypes that may provide a sturdier framework for model development and targets for preclinical treatment outcomes.
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Affiliation(s)
- Josh M. Krivinko
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - Jeremy Koppel
- The Litwin-Zucker Research Center for the Study of Alzheimer’s Disease, The Feinstein Institute for Medical Research, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY
| | - Alena Savonenko
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD
| | - Robert A. Sweet
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA,Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA,Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh, PA
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Krivinko JM, Erickson SL, Ding Y, Sun Z, Penzes P, MacDonald ML, Yates NA, Ikonomovic MD, Lopez OL, Sweet RA, Kofler J. Synaptic Proteome Compensation and Resilience to Psychosis in Alzheimer's Disease. Am J Psychiatry 2018; 175:999-1009. [PMID: 30021459 PMCID: PMC6167138 DOI: 10.1176/appi.ajp.2018.17080858] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The presence of psychosis in Alzheimer's disease denotes a phenotype with more rapid cognitive deterioration than in Alzheimer's disease without psychosis. Discovery of novel pharmacotherapies that engage therapeutic targets for prevention or treatment of Alzheimer's disease with psychosis would benefit from identifying the neurobiology of resilience to psychosis in Alzheimer's disease. The primary objective of this study was to determine whether alterations in the synaptic proteome were associated with resilience to psychotic symptoms in Alzheimer's disease and, if present, were independent of neuropathologic burden. METHOD Quantitative immunohistochemistry was used to measure multiple neuropathologies in dorsolateral prefrontal cortex from subjects with early and middle-stage Alzheimer's disease who differed in psychosis status. Synaptic proteins were quantified by liquid chromatography-mass spectrometry in gray matter homogenates from these subjects and from neuropathologically unaffected subjects. The synaptic proteome was similarly evaluated in cortical gray matter homogenate and in postsynaptic density fractions from an APPswe/PSEN1dE9 mouse model of amyloidosis with germline reduction in Kalrn, which has been shown to confer resilience to progression of psychosis-associated behaviors relative to APPswe/PSEN1dE9 alone. RESULTS Subjects resilient to psychotic symptoms in Alzheimer's disease had higher levels of synaptic proteins compared with those with psychosis and unaffected control subjects. Neuropathologic burden predicted less than 20% of the variance in psychosis status and did not account for the synaptic protein level differences between groups. Reduction of Kalrn in APPswe/PSEN1dE9 mice resulted in higher levels of synaptic proteins in cortical homogenate and normalized protein levels in the postsynaptic density. CONCLUSIONS Accumulation of synaptic proteins, particularly those that are enriched in the postsynaptic density, is associated with resilience to psychosis in Alzheimer's disease. One candidate mechanism for this synaptic proteome compensation is alteration in levels of proteins that facilitate the transport of synaptic proteins to and from the postsynaptic density.
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Affiliation(s)
- Josh M Krivinko
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Susan L Erickson
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Ying Ding
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Zhe Sun
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Peter Penzes
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Matthew L MacDonald
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Nathan A Yates
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Milos D Ikonomovic
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Oscar L Lopez
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Robert A Sweet
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
| | - Julia Kofler
- From the Departments of Psychiatry, Cell Biology, Neurology, and Pathology, University of Pittsburgh School of Medicine, Pittsburgh; the Department of Biostatistics, University of Pittsburgh School of Public Health, Pittsburgh; the Departments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago; the Geriatric Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh; and the Mental Illness Research, Education, and Clinical Center, VA Pittsburgh Healthcare System, Pittsburgh
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LaRese TP, Yan Y, Eipper BA, Mains RE. Using Kalirin conditional knockout mice to distinguish its role in dopamine receptor mediated behaviors. BMC Neurosci 2017; 18:45. [PMID: 28535798 PMCID: PMC5442696 DOI: 10.1186/s12868-017-0363-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 05/19/2017] [Indexed: 01/25/2023] Open
Abstract
Background Mice lacking Kalirin-7 (Kal7KO), a Rho GDP/GTP exchange factor, self-administer cocaine at a higher rate than wildtype mice, and show an exaggerated locomotor response to experimenter-administered cocaine. Kal7, which localizes to post-synaptic densities at glutamatergic synapses, interacts directly with the GluN2B subunit of the N-methyl-d-aspartate (NMDA; GluN) receptor. Consistent with these observations, Kal7 plays an essential role in NMDA receptor dependent long term potentiation and depression, and glutamatergic transmission plays a key role in the response to chronic cocaine. A number of genetic studies have implicated altered Kalirin expression in schizophrenia and other disorders such as Alzheimer’s Disease. Results A comparison of the effects of experimenter-administered cocaine on mice lacking all Kalirin isoforms to its effects on mice lacking only Kalirin-7 identified Kal7 as the key isoform whose deletion produces exaggerated locomotor responses to cocaine. Pretreatment of Kal7KO mice with a low dose of ifenprodil, a selective GluN2B antagonist, eliminated their enhanced locomotor response to cocaine, revealing an important role for GluN2B in this behavior. Selective knockout of Kalirin in dopamine transporter expressing neurons produced a transient enhancement of cocaine-induced locomotion, while knockout of Kalirin in Drd1a- or Drd2-dopamine receptor expressing neurons was without effect. As observed in Kalirin global knockout mice, eliminating Kalirin expression in Drd2-expressing neurons increased exploratory behavior in the elevated zero maze, an effect eliminated by pretreatment with ifenprodil. Conclusions The cocaine-sensitive neuronal pathways which are most sensitive to altered Kalirin function may be the pathways most dependent on GluN2B and Drd2. Electronic supplementary material The online version of this article (doi:10.1186/s12868-017-0363-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Taylor P LaRese
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, 06030-3401, USA
| | - Yan Yan
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, 06030-3401, USA
| | - Betty A Eipper
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, 06030-3401, USA.,Departments of Neuroscience and Molecular Biology and Biophysics, University of Connecticut Health Center, Farmington, CT, 06030-3401, USA
| | - Richard E Mains
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, 06030-3401, USA.
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