1
|
Wadle SL, Ritter TC, Wadle TTX, Hirtz JJ. Topography and Ensemble Activity in the Auditory Cortex of a Mouse Model of Fragile X Syndrome. eNeuro 2024; 11:ENEURO.0396-23.2024. [PMID: 38627066 PMCID: PMC11097631 DOI: 10.1523/eneuro.0396-23.2024] [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: 09/14/2023] [Revised: 03/11/2024] [Accepted: 04/01/2024] [Indexed: 05/18/2024] Open
Abstract
Autism spectrum disorder (ASD) is often associated with social communication impairments and specific sound processing deficits, for example, problems in following speech in noisy environments. To investigate underlying neuronal processing defects located in the auditory cortex (AC), we performed two-photon Ca2+ imaging in FMR1 (fragile X messenger ribonucleoprotein 1) knock-out (KO) mice, a model for fragile X syndrome (FXS), the most common cause of hereditary ASD in humans. For primary AC (A1) and the anterior auditory field (AAF), topographic frequency representation was less ordered compared with control animals. We additionally analyzed ensemble AC activity in response to various sounds and found subfield-specific differences. In A1, ensemble correlations were lower in general, while in secondary AC (A2), correlations were higher in response to complex sounds, but not to pure tones. Furthermore, sound specificity of ensemble activity was decreased in AAF. Repeating these experiments 1 week later revealed no major differences regarding representational drift. Nevertheless, we found subfield- and genotype-specific changes in ensemble correlation values between the two times points, hinting at alterations in network stability in FMR1 KO mice. These detailed insights into AC network activity and topography in FMR1 KO mice add to the understanding of auditory processing defects in FXS.
Collapse
Affiliation(s)
- Simon L Wadle
- Physiology of Neuronal Networks, Department of Biology, RPTU University of Kaiserslautern-Landau, Kaiserslautern D-67663, Germany
| | - Tamara C Ritter
- Physiology of Neuronal Networks, Department of Biology, RPTU University of Kaiserslautern-Landau, Kaiserslautern D-67663, Germany
| | - Tatjana T X Wadle
- Physiology of Neuronal Networks, Department of Biology, RPTU University of Kaiserslautern-Landau, Kaiserslautern D-67663, Germany
| | - Jan J Hirtz
- Physiology of Neuronal Networks, Department of Biology, RPTU University of Kaiserslautern-Landau, Kaiserslautern D-67663, Germany
| |
Collapse
|
2
|
Sah S, Keable R, Pfundstein G, Clemens KJ, Begg D, Schachner M, Leshchyns'ka I, Sytnyk V. Deficiency in the neural cell adhesion molecule 2 (NCAM2) reduces axonal levels of beta-site amyloid precursor protein cleaving enzyme 1 (BACE1), affects axonal organization in the hippocampus, and leads to behavioral deficits. Cereb Cortex 2023; 33:10047-10065. [PMID: 37522285 DOI: 10.1093/cercor/bhad264] [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] [Received: 01/19/2023] [Revised: 06/25/2023] [Accepted: 01/26/2023] [Indexed: 08/01/2023] Open
Abstract
The neural cell adhesion molecule 2 (NCAM2) regulates axonal organization in the central nervous system via mechanisms that have remained poorly understood. We now show that NCAM2 increases axonal levels of beta-site amyloid precursor protein cleaving enzyme 1 (BACE1), a protease that regulates axonal guidance. In brains of NCAM2-deficient mice, BACE1 levels are reduced in hippocampal mossy fiber projections, and the infrapyramidal bundle of these projections is shortened. This abnormal axonal organization correlates with impaired short-term spatial memory and cognitive flexibility in NCAM2-deficient male and female mice. Self-grooming, rearing, digging and olfactory acuity are increased in NCAM2-deficient male mice, when compared with littermate wild-type mice of the same sex. NCAM2-deficient female mice also show increased self-grooming, but are reduced in rearing, and do not differ from female wild-type mice in olfactory acuity and digging behavior. Our results indicate that errors in axonal guidance and organization caused by impaired BACE1 function can underlie the manifestation of neurodevelopmental disorders, including autism as found in humans with deletions of the NCAM2 gene.
Collapse
Affiliation(s)
- Saroj Sah
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Ryan Keable
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Grant Pfundstein
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Kelly J Clemens
- School of Psychology, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Denovan Begg
- School of Psychology, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Melitta Schachner
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ 08554, United States
| | - Iryna Leshchyns'ka
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Vladimir Sytnyk
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW 2052, Australia
| |
Collapse
|
3
|
Schmitt LM, Arzuaga AL, Dapore A, Duncan J, Patel M, Larson JR, Erickson CA, Sweeney JA, Ragozzino ME. Parallel learning and cognitive flexibility impairments between Fmr1 knockout mice and individuals with fragile X syndrome. Front Behav Neurosci 2023; 16:1074682. [PMID: 36688132 PMCID: PMC9849779 DOI: 10.3389/fnbeh.2022.1074682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 12/14/2022] [Indexed: 01/07/2023] Open
Abstract
Introduction Fragile X Syndrome (FXS) is a monogenic condition that leads to intellectual disability along with behavioral and learning difficulties. Among behavioral and learning difficulties, cognitive flexibility impairments are among the most commonly reported in FXS, which significantly impacts daily living. Despite the extensive use of the Fmr1 knockout (KO) mouse to understand molecular, synaptic and behavioral alterations related to FXS, there has been limited development of translational paradigms to understand cognitive flexibility that can be employed in both animal models and individuals with FXS to facilitate treatment development. Methods To begin addressing this limitation, a parallel set of studies were carried out that investigated probabilistic reversal learning along with other behavioral and cognitive tests in individuals with FXS and Fmr1 KO mice. Fifty-five adolescents and adults with FXS (67% male) and 34 age- and sex-matched typically developing controls (62% male) completed an initial probabilistic learning training task and a probabilistic reversal learning task. Results In males with FXS, both initial probabilistic learning and reversal learning deficits were found. However, in females with FXS, we only observed reversal learning deficits. Reversal learning deficits related to more severe psychiatric features in females with FXS, whereas increased sensitivity to negative feedback (lose:shift errors) unexpectedly appear to be adaptive in males with FXS. Male Fmr1 KO mice exhibited both an initial probabilistic learning and reversal learning deficit compared to that of wildtype (WT) mice. Female Fmr1 KO mice were selectively impaired on probabilistic reversal learning. In a prepotent response inhibition test, both male and female Fmr1 KO mice were impaired in learning to choose a non-preferred spatial location to receive a food reward compared to that of WT mice. Neither male nor female Fmr1 KO mice exhibited a change in anxiety compared to that of WT mice. Discussion Together, our findings demonstrate strikingly similar sex-dependent learning disturbances across individuals with FXS and Fmr1 KO mice. This suggests the promise of using analogous paradigms of cognitive flexibility across species that may speed treatment development to improve lives of individuals with FXS.
Collapse
Affiliation(s)
- Lauren M. Schmitt
- Division of Behavioral Medicine and Clinical Psychology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Anna L. Arzuaga
- Department of Psychology, University of Illinois Chicago, Chicago, IL, United States
| | - Ashley Dapore
- Department of Psychiatry, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Jason Duncan
- Department of Psychology, University of Illinois Chicago, Chicago, IL, United States
| | - Maya Patel
- Department of Psychology, University of Illinois Chicago, Chicago, IL, United States
| | - John R. Larson
- Department of Psychiatry, University of Illinois Chicago, Chicago, IL, United States
| | - Craig A. Erickson
- Department of Psychiatry, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States,Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - John A. Sweeney
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Michael E. Ragozzino
- Department of Psychology, University of Illinois Chicago, Chicago, IL, United States,*Correspondence: Michael E. Ragozzino,
| |
Collapse
|
4
|
Arzuaga AL, Edmison DD, Mroczek J, Larson J, Ragozzino ME. Prenatal stress and fluoxetine exposure in mice differentially affect repetitive behaviors and synaptic plasticity in adult male and female offspring. Behav Brain Res 2023; 436:114114. [DOI: 10.1016/j.bbr.2022.114114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 08/17/2022] [Accepted: 09/11/2022] [Indexed: 10/14/2022]
|
5
|
Yun M, Kim E, Jung MW. Enhanced fear limits behavioral flexibility in Shank2-deficient mice. Mol Autism 2022; 13:40. [PMID: 36192805 PMCID: PMC9531513 DOI: 10.1186/s13229-022-00518-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 09/15/2022] [Indexed: 11/28/2022] Open
Abstract
Background A core symptom of autism spectrum disorder (ASD) is repetitive and restrictive patterns of behavior. Cognitive inflexibility has been proposed as a potential basis for these symptoms of ASD. More generally, behavioral inflexibility has been proposed to underlie repetitive and restrictive behavior in ASD. Here, we investigated whether and how behavioral flexibility is compromised in a widely used animal model of ASD.
Methods We compared the behavioral performance of Shank2-knockout mice and wild-type littermates in reversal learning employing a probabilistic classical trace conditioning paradigm. A conditioned stimulus (odor) was paired with an unconditioned appetitive (water, 6 µl) or aversive (air puff) stimulus in a probabilistic manner. We also compared air puff-induced eye closure responses of Shank2-knockout and wild-type mice. Results Male, but not female, Shank2-knockout mice showed impaired reversal learning when the expected outcomes consisted of a water reward and a strong air puff. Moreover, male, but not female, Shank2-knockout mice showed stronger anticipatory eye closure responses to the air puff compared to wild-type littermates, raising the possibility that the impairment might reflect enhanced fear. In support of this contention, male Shank2-knockout mice showed intact reversal learning when the strong air puff was replaced with a mild air puff and when the expected outcomes consisted of only rewards. Limitations We examined behavioral flexibility in one behavioral task (reversal learning in a probabilistic classical trace conditioning paradigm) using one ASD mouse model (Shank2-knockout mice). Thus, future work is needed to clarify the extent to which our findings (that enhanced fear limits behavioral flexibility in ASD) can explain the behavioral inflexibility associated with ASD. Also, we examined only the relationship between fear and behavioral flexibility, leaving open the question of whether abnormalities in processes other than fear contribute to behavioral inflexibility in ASD. Finally, the neurobiological mechanisms linking Shank2-knockout and enhanced fear remain to be elucidated. Conclusions Our results indicate that enhanced fear suppresses reversal learning in the presence of an intact capability to learn cue-outcome contingency changes in Shank2-knockout mice. Our findings suggest that behavioral flexibility might be seriously limited by abnormal emotional responses in ASD. Supplementary Information The online version contains supplementary material available at 10.1186/s13229-022-00518-1.
Collapse
Affiliation(s)
- Miru Yun
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea.,Center for Synaptic Brain Dysfunctions, Institute for Basic Science, Daejeon, 34141, Korea
| | - Eunjoon Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea. .,Center for Synaptic Brain Dysfunctions, Institute for Basic Science, Daejeon, 34141, Korea.
| | - Min Whan Jung
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea. .,Center for Synaptic Brain Dysfunctions, Institute for Basic Science, Daejeon, 34141, Korea.
| |
Collapse
|
6
|
Harry GJ, McBride S, Witchey SK, Mhaouty-Kodja S, Trembleau A, Bridge M, Bencsik A. Roadbumps at the Crossroads of Integrating Behavioral and In Vitro Approaches for Neurotoxicity Assessment. FRONTIERS IN TOXICOLOGY 2022; 4:812863. [PMID: 35295216 PMCID: PMC8915899 DOI: 10.3389/ftox.2022.812863] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/25/2022] [Indexed: 12/15/2022] Open
Abstract
With the appreciation that behavior represents the integration and complexity of the nervous system, neurobehavioral phenotyping and assessment has seen a renaissance over the last couple of decades, resulting in a robust database on rodent performance within various testing paradigms, possible associations with human disorders, and therapeutic interventions. The interchange of data across behavior and other test modalities and multiple model systems has advanced our understanding of fundamental biology and mechanisms associated with normal functions and alterations in the nervous system. While there is a demonstrated value and power of neurobehavioral assessments for examining alterations due to genetic manipulations, maternal factors, early development environment, the applied use of behavior to assess environmental neurotoxicity continues to come under question as to whether behavior represents a sensitive endpoint for assessment. Why is rodent behavior a sensitive tool to the neuroscientist and yet, not when used in pre-clinical or chemical neurotoxicity studies? Applying new paradigms and evidence on the biological basis of behavior to neurobehavioral testing requires expertise and refinement of how such experiments are conducted to minimize variability and maximize information. This review presents relevant issues of methods used to conduct such test, sources of variability, experimental design, data analysis, interpretation, and reporting. It presents beneficial and critical limitations as they translate to the in vivo environment and considers the need to integrate across disciplines for the best value. It proposes that a refinement of behavioral assessments and understanding of subtle pronounced differences will facilitate the integration of data obtained across multiple approaches and to address issues of translation.
Collapse
Affiliation(s)
- G. Jean Harry
- Neurotoxicology Group, Molecular Toxicology Branch, Division National Toxicology Program, National Institute of Environmental Health Sciences, Durham, NC, United States
- *Correspondence: G. Jean Harry,
| | - Sandra McBride
- Social & Scientific Systems, Inc., a DLH Holdings Company, Durham, NC, United States
| | - Shannah K. Witchey
- Division National Toxicology Program, National Institute of Environmental Health Sciences, Durham, NC, United States
| | - Sakina Mhaouty-Kodja
- Sorbonne Université, CNRS, INSERM, Neuroscience Paris Seine – Institut de Biologie Paris Seine, Paris, France
| | - Alain Trembleau
- Sorbonne Université, CNRS UMR8246, Inserm U1130, Institut de Biologie Paris Seine (IBPS), Neuroscience Paris Seine (NPS), Paris, France
| | - Matthew Bridge
- Social & Scientific Systems, Inc., a DLH Holdings Company, Durham, NC, United States
| | - Anna Bencsik
- Anses Laboratoire de Lyon, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Université de Lyon 1, Lyon, France
| |
Collapse
|
7
|
Nolan SO, Hodges SL, Binder MS, Smith GD, Okoh JT, Jefferson TS, Escobar B, Lugo JN. Dietary rescue of adult behavioral deficits in the Fmr1 knockout mouse. PLoS One 2022; 17:e0262916. [PMID: 35089938 PMCID: PMC8797197 DOI: 10.1371/journal.pone.0262916] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 01/09/2022] [Indexed: 11/21/2022] Open
Abstract
The current study aimed to further address important questions regarding the therapeutic efficacy of omega-3 fatty acids for various behavioral and neuroimmune aspects of the Fmr1 phenotype. To address these questions, our experimental design utilized two different omega-3 fatty acid administration timepoints, compared to both standard laboratory chow controls ("Standard") and a diet controlling for the increase in fat content ("Control Fat"). In the first paradigm, post-weaning supplementation (after postnatal day 21) with the omega-3 fatty acid diet ("Omega-3") reversed deficits in startle threshold, but not deficits in prepulse inhibition, and the effect on startle threshold was not specific to the Omega-3 diet. However, post-weaning supplementation with both experimental diets also impaired acquisition of a fear response, recall of the fear memory and contextual fear conditioning compared to the Standard diet. The post-weaning Omega-3 diet reduced hippocampal expression of IL-6 and this reduction of IL-6 was significantly associated with diminished performance in the fear conditioning task. In the perinatal experimental paradigm, the Omega-3 diet attenuated hyperactivity and acquisition of a fear response. Additionally, perinatal exposure to the Control Fat diet (similar to a "Western" diet) further diminished nonsocial anxiety in the Fmr1 knockout. This study provides significant evidence that dietary fatty acids throughout the lifespan can significantly impact the behavioral and neuroimmune phenotype of the Fmr1 knockout model.
Collapse
Affiliation(s)
- Suzanne O. Nolan
- Department of Psychology and Neuroscience, Baylor University, Waco, Texas, United States of America
| | - Samantha L. Hodges
- Institute of Biomedical Studies, Baylor University, Waco, Texas, United States of America
| | - Matthew S. Binder
- Department of Psychology and Neuroscience, Baylor University, Waco, Texas, United States of America
| | - Gregory D. Smith
- Institute of Biomedical Studies, Baylor University, Waco, Texas, United States of America
| | - James T. Okoh
- Department of Psychology and Neuroscience, Baylor University, Waco, Texas, United States of America
| | - Taylor S. Jefferson
- Department of Psychology and Neuroscience, Baylor University, Waco, Texas, United States of America
| | - Brianna Escobar
- Department of Psychology and Neuroscience, Baylor University, Waco, Texas, United States of America
| | - Joaquin N. Lugo
- Department of Psychology and Neuroscience, Baylor University, Waco, Texas, United States of America
- Institute of Biomedical Studies, Baylor University, Waco, Texas, United States of America
| |
Collapse
|
8
|
Perepelkina OV, Poletaeva II. Selection of Laboratory Mice for the Cognitive Task Successful Solution and for the Inability to Solve It. DOKL BIOCHEM BIOPHYS 2021; 499:207-210. [PMID: 34426912 DOI: 10.1134/s1607672921040116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 03/27/2021] [Accepted: 03/27/2021] [Indexed: 11/23/2022]
Abstract
Using the selected mouse strain EX as the founding population (selection for extrapolation ability) three selection generations of mice were obtained, which were selected for successful solution of object permanence test (plus-sub-strain) and for lack of such solution (minus-sub-strain). The successful solution required not only the ability to operate the object permanence rule (by J. Piajet), but the performance of complicated action (executive function) which was significantly higher in plus-substrain, and this is the unique example of successful selection for cognitive trait.
Collapse
Affiliation(s)
| | - I I Poletaeva
- Biology Department, Moscow State University, Moscow, Russia.
| |
Collapse
|
9
|
Shin KO, Crumrine DA, Kim S, Lee Y, Kim B, Abuabara K, Park C, Uchida Y, Wakefield JS, Meyer JM, Jeong S, Park BD, Park K, Elias PM. Phenotypic overlap between atopic dermatitis and autism. BMC Neurosci 2021; 22:43. [PMID: 34157971 PMCID: PMC8218496 DOI: 10.1186/s12868-021-00645-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 06/01/2021] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Autism, a childhood behavioral disorder, belongs to a large suite of diseases, collectively referred to as autism spectrum disorders (ASD). Though multifactorial in etiology, approximately 10% of ASD are associated with atopic dermatitis (AD). Moreover, ASD prevalence increases further as AD severity worsens, though these disorders share no common causative mutations. We assessed here the link between these two disorders in the standard, valproic acid mouse model of ASD. In prior studies, there was no evidence of skin involvement, but we hypothesized that cutaneous involvement could be detected in experiments conducted in BALB/c mice. BALB/c is an albino, laboratory-bred strain of the house mouse and is among the most widely used inbred strains used in animal experimentation. METHODS We performed our studies in valproic acid (VPA)-treated BALB/c hairless mice, a standard mouse model of ASD. Mid-trimester pregnant mice received a single intraperitoneal injection of either valproic acid sodium salt dissolved in saline or saline alone on embryonic day 12.5 and were housed individually until postnatal day 21. Only the brain and epidermis appeared to be affected, while other tissues remain unchanged. At various postnatal time points, brain, skin and blood samples were obtained for histology and for quantitation of tissue sphingolipid content and cytokine levels. RESULTS AD-like changes in ceramide content occurred by day one postpartum in both VPA-treated mouse skin and brain. The temporal co-emergence of AD and ASD, and the AD phenotype-dependent increase in ASD prevalence correlated with early appearance of cytokine markers (i.e., interleukin [IL]-4, 5, and 13), as well as mast cells in skin and brain. The high levels of interferon (IFN)γ not only in skin, but also in brain likely account for a significant decline in esterified very-long-chain N-acyl fatty acids in brain ceramides, again mimicking known IFNγ-induced changes in AD. CONCLUSION Baseline involvement of both AD and ASD could reflect concurrent neuro- and epidermal toxicity, possibly because both epidermis and neural tissues originate from the embryonic neuroectoderm. These studies illuminate the shared susceptibility of the brain and epidermis to a known neurotoxin, suggesting that the atopic diathesis could be extended to include ASD.
Collapse
Affiliation(s)
- Kyong-Oh Shin
- Department of Food Science/Nutrition, & Convergence Program of Material Science for Medicine/Pharmaceutics, and the Korean Institute of Nutrition, Hallym University, Chuncheon, South Korea
| | - Debra A Crumrine
- Dept. of Dermatology, University of California, NCIRE, and Veterans Affairs Medical Center, 4150 Clement Street, MS 190, San Francisco, CA, 94121, USA
| | - Sungeun Kim
- Department of Food Science/Nutrition, & Convergence Program of Material Science for Medicine/Pharmaceutics, and the Korean Institute of Nutrition, Hallym University, Chuncheon, South Korea
| | - Yerin Lee
- Department of Food Science/Nutrition, & Convergence Program of Material Science for Medicine/Pharmaceutics, and the Korean Institute of Nutrition, Hallym University, Chuncheon, South Korea
| | - Bogyeong Kim
- Department of Food Science/Nutrition, & Convergence Program of Material Science for Medicine/Pharmaceutics, and the Korean Institute of Nutrition, Hallym University, Chuncheon, South Korea
| | - Katrina Abuabara
- Department of Dermatology, University of San Francisco, San Francisco, CA, USA
| | - Chaehyeong Park
- Dept. of Dermatology, University of California, NCIRE, and Veterans Affairs Medical Center, 4150 Clement Street, MS 190, San Francisco, CA, 94121, USA
| | - Yoshikazu Uchida
- Dept. of Dermatology, University of California, NCIRE, and Veterans Affairs Medical Center, 4150 Clement Street, MS 190, San Francisco, CA, 94121, USA
| | - Joan S Wakefield
- Dept. of Dermatology, University of California, NCIRE, and Veterans Affairs Medical Center, 4150 Clement Street, MS 190, San Francisco, CA, 94121, USA
| | - Jason M Meyer
- Dept. of Dermatology, University of California, NCIRE, and Veterans Affairs Medical Center, 4150 Clement Street, MS 190, San Francisco, CA, 94121, USA
| | - Sekyoo Jeong
- Dept of Cosmetic Science, Seowon University, Cheongju, South Korea
| | - Byeong Deog Park
- Sphingobrain Inc., San Francisco, CA, USA
- Dr. Raymond Laboratories, Inc, Englewood Cliffs, NJ, USA
| | - Kyungho Park
- Department of Food Science/Nutrition, & Convergence Program of Material Science for Medicine/Pharmaceutics, and the Korean Institute of Nutrition, Hallym University, Chuncheon, South Korea.
| | - Peter M Elias
- Dept. of Dermatology, University of California, NCIRE, and Veterans Affairs Medical Center, 4150 Clement Street, MS 190, San Francisco, CA, 94121, USA.
| |
Collapse
|
10
|
Chintamaneni PK, Krishnamurthy PT, Pindiprolu SKSS. Polysorbate-80 surface modified nano-stearylamine BQCA conjugate for the management of Alzheimer's disease. RSC Adv 2021; 11:5325-5334. [PMID: 35423107 PMCID: PMC8694636 DOI: 10.1039/d1ra00049g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 01/13/2021] [Indexed: 01/31/2023] Open
Abstract
Acetylcholinesterase (AChE) inhibitors such as donepezil, galantamine and rivastigmine are used for the management of dementia in Alzheimer's Disease (AD). These drugs elevate endogenous acetylcholine (ACh) levels at the M1 muscarinic receptor in the brain to achieve therapeutic benefits. However, their side effects, such as nausea, vomiting, dizziness, insomnia, loss of appetite, altered heart rate, etc., are related to non-specific peripheral activation of M2-M5 muscarinic subtypes. It is logical, therefore, to develop drugs that selectively activate brain M1 receptors. Unfortunately, the orthosteric site homology among the receptor subtypes does not permit this approach. An alternative approach is to use positive allosteric modulator (PAM) of M1 receptors like benzyl quinolone carboxylic acid (BQCA). PAMs although devoid of M1 agonist activity, however, when bound, enhance the binding affinity of orthosteric ligand, Ach. The current challenge with PAMS is their low brain half-life, permeability, and higher elimination rates. This study reports active targeting of brain M1 receptors using surface modified nano lipid-drug conjugates (LDC) of M1 PAM, BQCA, to treat AD. Polysorbate-80 (P-80) surface modified stearylamine (SA)-BQCA conjugated nanoparticles (BQCA-SA-P80-NPs) were prepared by conjugating BQCA to SA, followed by the formation of nanoparticles (NPs) using P-80 by solvent injection method. The BQCA-SA-P80-NPs are near-spherical with a particle size (PS) of 166.62 ± 1.24 nm and zeta potential (ZP) of 23.59 ± 0.37 mV. In the in vitro cytotoxicity (SH-SY5Y cells) and hemolysis assays, BQCA-SA-P80-NPs, show acceptable safety and compatibility. In mice, Alzheimer's model, BQCA-SA-P80-NPs significantly prevent STZ induced changes in memory, neuronal Aβ1-42, p-Tau, APP, NF-κB, and BACE levels and neuronal cell death, when compared to untreated disease control and naïve BQCA treated group. Further, BQCA-SA-P80-NPs significantly improve the therapeutic efficacy of AChE inhibitor, donepezil (DPZ), indicating its potentiating effects. In vivo biodistribution studies in mice show selective accumulation of BQCA-SA-P80-NPs in the brain, suggesting an improved brain bioavailability and reduced peripheral side effects of BQCA. The study results demonstrate that BQCA-SA-P80-NPs can improve brain bioavailability and therapeutic efficacy of BQCA in AD.
Collapse
Affiliation(s)
- Pavan Kumar Chintamaneni
- Department of Pharmacology, JSS College of Pharmacy (JSS Academy of Higher Education & Research) Ooty, The Nilgiris Tamil Nadu-643001 India +91-7598223850
- Department of Pharmaceutics, Raghavendra Institute of Pharmaceutical Education and Research (RIPER) Anantapuramu 51572 Andhra Pradesh India
| | - Praveen Thaggikuppe Krishnamurthy
- Department of Pharmacology, JSS College of Pharmacy (JSS Academy of Higher Education & Research) Ooty, The Nilgiris Tamil Nadu-643001 India +91-7598223850
| | - Sai Kiran S S Pindiprolu
- Department of Pharmacology, JSS College of Pharmacy (JSS Academy of Higher Education & Research) Ooty, The Nilgiris Tamil Nadu-643001 India +91-7598223850
- Department of Pharmacology, Aditya Pharmacy College Surampalem East Godavari 533 437 Andhra Pradesh India
| |
Collapse
|
11
|
Gandhi T, Lee CC. Neural Mechanisms Underlying Repetitive Behaviors in Rodent Models of Autism Spectrum Disorders. Front Cell Neurosci 2021; 14:592710. [PMID: 33519379 PMCID: PMC7840495 DOI: 10.3389/fncel.2020.592710] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 12/09/2020] [Indexed: 12/15/2022] Open
Abstract
Autism spectrum disorder (ASD) is comprised of several conditions characterized by alterations in social interaction, communication, and repetitive behaviors. Genetic and environmental factors contribute to the heterogeneous development of ASD behaviors. Several rodent models display ASD-like phenotypes, including repetitive behaviors. In this review article, we discuss the potential neural mechanisms involved in repetitive behaviors in rodent models of ASD and related neuropsychiatric disorders. We review signaling pathways, neural circuits, and anatomical alterations in rodent models that display robust stereotypic behaviors. Understanding the mechanisms and circuit alterations underlying repetitive behaviors in rodent models of ASD will inform translational research and provide useful insight into therapeutic strategies for the treatment of repetitive behaviors in ASD and other neuropsychiatric disorders.
Collapse
Affiliation(s)
- Tanya Gandhi
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, LA, United States
| | | |
Collapse
|