1
|
Kosel F, Hartley MR, Franklin TB. Aberrant Cortical Activity in 5xFAD Mice in Response to Social and Non-Social Olfactory Stimuli. J Alzheimers Dis 2024; 97:659-677. [PMID: 38143360 DOI: 10.3233/jad-230858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
BACKGROUND Neuroimaging studies investigating the behavioral and psychological symptoms of dementia (BPSD)- such as apathy, anxiety, and depression- have linked some of these symptoms with altered neural activity. However, inconsistencies in operational definitions and rating scales, limited scope of assessments, and poor temporal resolution of imaging techniques have hampered human studies. Many transgenic (Tg) mouse models of Alzheimer's disease (AD) exhibit BPSD-like behaviors concomitant with AD-related neuropathology, allowing examination of how neural activity may relate to BPSD-like behaviors with high temporal and spatial resolution. OBJECTIVE To examine task-dependent neural activity in the medial prefrontal cortex (mPFC) of AD-model mice in response to social and non-social olfactory stimuli. METHODS We previously demonstrated age-related decreases in social investigation in Tg 5xFAD females, and this reduced social investigation is evident in Tg 5xFAD females and males by 6 months of age. In the present study, we examine local field potential (LFP) in the mPFC of awake, behaving 5xFAD females and males at 6 months of age during exposure to social and non-social odor stimuli in a novel olfactometer. RESULTS Our results indicate that Tg 5xFAD mice exhibit aberrant baseline and task-dependent LFP activity in the mPFC- including higher relative delta (1-4 Hz) band power and lower relative power in higher bands, and overall stronger phase-amplitude coupling- compared to wild-type controls. CONCLUSIONS These results are consistent with previous human and animal studies examining emotional processing, anxiety, fear behaviors, and stress responses, and suggest that Tg 5xFAD mice may exhibit altered arousal or anxiety.
Collapse
Affiliation(s)
- Filip Kosel
- Department of Psychology and Neuroscience, Faculty of Science, Dalhousie University, Halifax, NS, Canada
| | - Mackenzie Rae Hartley
- Department of Psychology and Neuroscience, Faculty of Science, Dalhousie University, Halifax, NS, Canada
| | - Tamara Brook Franklin
- Department of Psychology and Neuroscience, Faculty of Science, Dalhousie University, Halifax, NS, Canada
| |
Collapse
|
2
|
Teli P, Kale V, Vaidya A. Beyond animal models: revolutionizing neurodegenerative disease modeling using 3D in vitro organoids, microfluidic chips, and bioprinting. Cell Tissue Res 2023; 394:75-91. [PMID: 37572163 DOI: 10.1007/s00441-023-03821-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 07/27/2023] [Indexed: 08/14/2023]
Abstract
Neurodegenerative diseases (NDs) are characterized by uncontrolled loss of neuronal cells leading to a progressive deterioration of brain functions. The transition rate of numerous neuroprotective drugs against Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and Huntington's disease, leading to FDA approval, is only 8-14% in the last two decades. Thus, in spite of encouraging preclinical results, these drugs have failed in human clinical trials, demonstrating that traditional cell cultures and animal models cannot accurately replicate human pathophysiology. Hence, in vitro three-dimensional (3D) models have been developed to bridge the gap between human and animal studies. Such technological advancements in 3D culture systems, such as human-induced pluripotent stem cell (iPSC)-derived cells/organoids, organ-on-a-chip technique, and 3D bioprinting, have aided our understanding of the pathophysiology and underlying mechanisms of human NDs. Despite these recent advances, we still lack a 3D model that recapitulates all the key aspects of NDs, thus making it difficult to study the ND's etiology in-depth. Hence in this review, we propose developing a combinatorial approach that allows the integration of patient-derived iPSCs/organoids with 3D bioprinting and organ-on-a-chip technique as it would encompass the neuronal cells along with their niche. Such a 3D combinatorial approach would characterize pathological processes thoroughly, making them better suited for high-throughput drug screening and developing effective novel therapeutics targeting NDs.
Collapse
Affiliation(s)
- Prajakta Teli
- Symbiosis International (Deemed University), Symbiosis School of Biological Sciences, Pune, 412115, India
- Symbiosis International (Deemed University), Symbiosis Center for Stem Cell Research, Pune, 412115, India
| | - Vaijayanti Kale
- Symbiosis International (Deemed University), Symbiosis School of Biological Sciences, Pune, 412115, India
- Symbiosis International (Deemed University), Symbiosis Center for Stem Cell Research, Pune, 412115, India
| | - Anuradha Vaidya
- Symbiosis International (Deemed University), Symbiosis School of Biological Sciences, Pune, 412115, India.
- Symbiosis International (Deemed University), Symbiosis Center for Stem Cell Research, Pune, 412115, India.
| |
Collapse
|
3
|
Gouveia FV, Lea‐Banks H, Aubert I, Lipsman N, Hynynen K, Hamani C. Anesthetic-loaded nanodroplets with focused ultrasound reduces agitation in Alzheimer's mice. Ann Clin Transl Neurol 2023; 10:507-519. [PMID: 36715553 PMCID: PMC10109287 DOI: 10.1002/acn3.51737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/03/2023] [Accepted: 01/16/2023] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVE Alzheimer's disease (AD) is often associated with neuropsychiatric symptoms, including agitation and aggressive behavior. These symptoms increase with disease severity, ranging from 10% in mild cognitive impairment to 50% in patients with moderate-to-severe AD, pose a great risk for self-injury and injury to caregivers, result in high rates of institutionalization and great suffering for patients and families. Current pharmacological therapies have limited efficacy and a high potential for severe side effects. Thus, there is a growing need to develop novel therapeutics tailored to safely and effectively reduce agitation and aggressive behavior in AD. Here, we investigate for the first time the use of focused ultrasound combined with anesthetic-loaded nanodroplets (nanoFUS) targeting the amygdala (key structure in the neurocircuitry of agitation) as a novel minimally invasive tool to modulate local neural activity and reduce agitation and aggressive behavior in the TgCRND8 AD transgenic mice. METHODS Male and female animals were tested in the resident-intruder (i.e., aggressive behavior) and open-field tests (i.e., motor agitation) for baseline measures, followed by treatment with active- or sham-nanoFUS. Behavioral testing was then repeated after treatment. RESULTS Active-nanoFUS neuromodulation reduced aggressive behavior and agitation in male mice, as compared to sham-treated controls. Treatment with active-nanoFUS increased the time male mice spent in social-non-aggressive behaviors. INTERPRETATION Our results show that neuromodulation with active-nanoFUS may be a potential therapeutic tool for the treatment of neuropsychiatric symptoms, with special focus on agitation and aggressive behaviors. Further studies are necessary to establish cellular, molecular and long-term behavioral changes following treatment with nanoFUS.
Collapse
Affiliation(s)
- Flavia Venetucci Gouveia
- Biological Sciences PlatformSunnybrook Research InstituteTorontoOntarioM4N 3M5Canada
- Neurosciences and Mental HealthThe Hospital for Sick ChildrenTorontoOntarioM5G 1X8Canada
| | - Harriet Lea‐Banks
- Physical Sciences PlatformSunnybrook Research InstituteTorontoOntarioM4N 3M5Canada
| | - Isabelle Aubert
- Biological Sciences PlatformSunnybrook Research InstituteTorontoOntarioM4N 3M5Canada
- Laboratory Medicine & PathobiologyUniversity of TorontoTorontoOntarioM5S 1A1Canada
- Hurvitz Brain Sciences Program, Sunnybrook Health Sciences CentreTorontoOntarioM4N 3M5Canada
| | - Nir Lipsman
- Biological Sciences PlatformSunnybrook Research InstituteTorontoOntarioM4N 3M5Canada
- Hurvitz Brain Sciences Program, Sunnybrook Health Sciences CentreTorontoOntarioM4N 3M5Canada
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences CentreTorontoOntarioM4N 3M5Canada
- Division of NeurosurgeryUniversity of TorontoTorontoOntarioM5T 1P5Canada
| | - Kullervo Hynynen
- Physical Sciences PlatformSunnybrook Research InstituteTorontoOntarioM4N 3M5Canada
- Hurvitz Brain Sciences Program, Sunnybrook Health Sciences CentreTorontoOntarioM4N 3M5Canada
- Department of Medical BiophysicsUniversity of TorontoTorontoOntarioM5S 1A1Canada
- Institute of Biomedical Engineering, University of TorontoTorontoOntarioM5S 1A1Canada
| | - Clement Hamani
- Biological Sciences PlatformSunnybrook Research InstituteTorontoOntarioM4N 3M5Canada
- Hurvitz Brain Sciences Program, Sunnybrook Health Sciences CentreTorontoOntarioM4N 3M5Canada
- Harquail Centre for Neuromodulation, Sunnybrook Health Sciences CentreTorontoOntarioM4N 3M5Canada
- Division of NeurosurgeryUniversity of TorontoTorontoOntarioM5T 1P5Canada
| |
Collapse
|
4
|
Mirza FJ, Zahid S. Ursolic acid and rosmarinic acid ameliorate alterations in hippocampal neurogenesis and social memory induced by amyloid beta in mouse model of Alzheimer's disease. Front Pharmacol 2022; 13:1058358. [PMID: 36618920 PMCID: PMC9817136 DOI: 10.3389/fphar.2022.1058358] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022] Open
Abstract
Alzheimer's disease (AD) is a multifaceted neurodegenerative disorder characterized by substantial neuronal damage which manifests in the form of deficits in memory and cognition. In spite of the debilitating nature of Alzheimer's disease (AD), a dearth of treatment strategies calls for the need to develop therapeutic agents that stimulate neurogenesis and alleviate the associated cognitive deficits. The present study investigates the therapeutic potential of two major phytochemicals, rosmarinic acid (RA) and ursolic acid (UA) in an amyloid beta1-42 (Aβ1-42)-induced model of AD. UA, a natural pentacyclic triterpenoid and RA, a phenolic ester are major bioactive constituents of Rosmarinus officinalis, which is a medicinal herb belonging to family Lamiaceae and exhibiting significant biological properties including neuroprotection. Donepezil, a second generation cholinesterase inhibitor approved for the treatment of mild, moderate and severe Alzheimer's disease (AD) is used as control. Out of eight groups of male BALB/c mice, stereotaxic surgery was performed on four groups (n = 6 each) to introduce Aβ1-42 in the hippocampus followed by treatment with vehicle (phosphate-buffered saline (PBS)), donepezil, UA or RA. The other four groups were given vehicle, donepezil, UA and RA only. Behavior analysis for social interaction was performed which constitutes the social affiliation and the social novelty preference test. Presence of Aβ plaques and expression of neurogenesis markers i.e., doublecortin (DCX) and Ki-67 were also assessed. Results revealed the neuroprotective effect of UA and RA observed through substantial reduction in Aβ plaques as compared to the Aβ1-42- and donepezil-treated groups. The neuronal density was also restored as evident via DCX and Ki-67 immunoreactivity in Aβ1-42 + RA and Aβ1-42+UA-treated groups in comparison to Aβ1-42-treated and Aβ1-42+donepezil-treated groups. The social affiliation was reestablished in the Aβ1-42 administered groups treated with UA and RA. Molecular docking studies further validated the comparable binding of UA and RA with Ki-67 and DCX to that of donepezil. Our findings suggest that UA and RA are potential neuroprotective compounds that reverses the histological hallmarks of AD and ameliorate impaired social memory and hippocampal neurogenesis.
Collapse
|
5
|
Aranđelović J, Santrač A, Batinić B, Todorović L, Stevanović V, Tiruveedhula VVNPB, Sharmin D, Rashid F, Stanojević B, Cook JM, Savić MM. Effects of α5 GABA A receptor modulation on social interaction, memory, and neuroinflammation in a mouse model of Alzheimer's disease. CNS Neurosci Ther 2022; 28:1767-1778. [PMID: 35822698 PMCID: PMC9532908 DOI: 10.1111/cns.13914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 06/08/2022] [Accepted: 06/21/2022] [Indexed: 12/24/2022] Open
Abstract
Aims GABAergic modulation involved in cognitive processing appears to be substantially changed in Alzheimer's disease (AD). In a widely used 5xFAD model of AD, we aimed to assess if negative and positive allosteric modulators of α5 GABAA receptors (NAM and PAM, respectively) would affect social interaction, social, object and spatial memory, and neuroinflammation. Methods After 10‐day treatment with PAM, NAM, or solvent, 6‐month‐old transgenic and non‐transgenic 5xFAD mice underwent testing in a behavioral battery. Gene expressions of IL‐1β, IL‐6, TNF‐α, GFAP, and IBA‐1 were determined in hippocampus and prefrontal cortex by qPCR. Results PAM treatment impaired spatial learning in transgenic females compared to solvent‐treated transgenic females, and social recognition in transgenic and non‐transgenic males. NAM treatment declined social interaction in transgenic and non‐transgenic males, while had beneficial effect on cognitive flexibility in non‐transgenic males compared to solvent‐treated non‐transgenic males. Transgenic animals have not fully displayed cognitive symptoms, but neuroinflammation was confirmed. NAM reduced proinflammatory gene expressions in transgenic females and astrogliosis in transgenic males compared to pathological controls. Conclusion PAM and NAM failed to exert favorable behavioral effects in transgenic animals. Suppression of neuroinflammation obtained with NAM calls for more studies with GABAergic ligands in amyloid beta‐ and/or tau‐dependent models with prominent neuroinflammation.
Collapse
Affiliation(s)
- Jovana Aranđelović
- Department of Pharmacology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Anja Santrač
- Department of Pharmacology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Bojan Batinić
- Department of Physiology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Lidija Todorović
- Laboratory for Radiobiology and Molecular Genetics, Vinča Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Vladimir Stevanović
- Department of Pharmacology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | | | - Dishary Sharmin
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA
| | - Farjana Rashid
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA
| | - Boban Stanojević
- Laboratory for Radiobiology and Molecular Genetics, Vinča Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia.,Comprehensive Cancer Centre, Faculty of Life Sciences & Medicine, King's College London, Rayne Institute, London, UK
| | - James M Cook
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA
| | - Miroslav M Savić
- Department of Pharmacology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| |
Collapse
|
6
|
Chen L, Dar NJ, Na R, McLane KD, Yoo K, Han X, Ran Q. Enhanced defense against ferroptosis ameliorates cognitive impairment and reduces neurodegeneration in 5xFAD mice. Free Radic Biol Med 2022; 180:1-12. [PMID: 34998934 PMCID: PMC8840972 DOI: 10.1016/j.freeradbiomed.2022.01.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/01/2022] [Accepted: 01/03/2022] [Indexed: 12/11/2022]
Abstract
Oxidative damage including lipid peroxidation is widely reported in Alzheimer's disease (AD) with the peroxidation of phospholipids in membranes being the driver of ferroptosis, an iron-dependent oxidative form of cell death. However, the importance of ferroptosis in AD remains unclear. This study tested whether ferroptosis inhibition ameliorates AD. 5xFAD mice, a widely used AD mouse model with cognitive impairment and robust neurodegeneration, exhibit markers of ferroptosis including increased lipid peroxidation, elevated lyso-phospholipids, and reduced level of Gpx4, the master defender against ferroptosis. To determine if enhanced defense against ferroptosis retards disease development, we generated 5xFAD mice that overexpress Gpx4, i.e., 5xFAD/GPX4 mice. Consistent with enhanced defense against ferroptosis, neurons from 5xFAD/GPX4 mice showed an augmented capacity to reduce lipid reactive oxygen species. In addition, compared with control 5xFAD mice, 5xFAD/GPX4 mice showed significantly improved learning and memory abilities and had reduced neurodegeneration. Moreover, 5xFAD/GPX4 mice exhibited attenuated markers of ferroptosis. Our results indicate that enhanced defense against ferroptosis is effective in ameliorating cognitive impairment and decreasing neurodegeneration of 5xFAD mice. The findings support the notion that ferroptosis is a key contributor to AD pathogenesis.
Collapse
Affiliation(s)
- Liuji Chen
- Department of Cell Systems & Anatomy, USA.
| | | | - Ren Na
- Department of Cell Systems & Anatomy, USA.
| | | | | | - Xianlin Han
- Department of Medicine - Diabetes, USA; Barshop Institute on Longevity and Aging, University of Texas Health San Antonio, San Antonio, TX, USA.
| | - Qitao Ran
- Department of Cell Systems & Anatomy, USA; Research Service, South Texas Veterans Health Care System, San Antonio, TX, USA.
| |
Collapse
|