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Maita I, Bazer A, Chae K, Parida A, Mirza M, Sucher J, Phan M, Liu T, Hu P, Soni R, Roepke TA, Samuels BA. Chemogenetic activation of corticotropin-releasing factor-expressing neurons in the anterior bed nucleus of the stria terminalis reduces effortful motivation behaviors. Neuropsychopharmacology 2024; 49:377-385. [PMID: 37452139 PMCID: PMC10724138 DOI: 10.1038/s41386-023-01646-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/23/2023] [Accepted: 06/27/2023] [Indexed: 07/18/2023]
Abstract
Corticotropin-releasing factor (CRF) in the anterior bed nucleus of the stria terminalis (aBNST) is associated with chronic stress and avoidance behavior. However, CRF + BNST neurons project to reward- and motivation-related brain regions, suggesting a potential role in motivated behavior. We used chemogenetics to selectively activate CRF+ aBNST neurons in male and female CRF-ires-Cre mice during an effort-related choice task and a concurrent choice task. In both tasks, mice were given the option either to exert effort for high value rewards or to choose freely available low value rewards. Acute chemogenetic activation of CRF+ aBNST neurons reduced barrier climbing for a high value reward in the effort-related choice task in both males and females. Furthermore, acute chemogenetic activation of CRF+ aBNST neurons also reduced effortful lever pressing in high-performing males in the concurrent choice task. These data suggest a novel role for CRF+ aBNST neurons in effort-based decision and motivation behaviors.
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Affiliation(s)
- Isabella Maita
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Neuroscience Graduate Program, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Allyson Bazer
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Behavioral and Systems Neuroscience Graduate Program, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Kiyeon Chae
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Amlaan Parida
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Mikyle Mirza
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Jillian Sucher
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Behavioral and Systems Neuroscience Graduate Program, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Mimi Phan
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Tonia Liu
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Pu Hu
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Ria Soni
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Troy A Roepke
- Department of Animal Sciences, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Benjamin Adam Samuels
- Department of Psychology, School of Arts and Sciences, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.
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Maita I, Roepke TA, Samuels BA. Chronic stress-induced synaptic changes to corticotropin-releasing factor-signaling in the bed nucleus of the stria terminalis. Front Behav Neurosci 2022; 16:903782. [PMID: 35983475 PMCID: PMC9378865 DOI: 10.3389/fnbeh.2022.903782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 07/05/2022] [Indexed: 11/22/2022] Open
Abstract
The sexually dimorphic bed nucleus of the stria terminalis (BNST) is comprised of several distinct regions, some of which act as a hub for stress-induced changes in neural circuitry and behavior. In rodents, the anterodorsal BNST is especially affected by chronic exposure to stress, which results in alterations to the corticotropin-releasing factor (CRF)-signaling pathway, including CRF receptors and upstream regulators. Stress increases cellular excitability in BNST CRF+ neurons by potentiating miniature excitatory postsynaptic current (mEPSC) amplitude, altering the resting membrane potential, and diminishing M-currents (a voltage-gated K+ current that stabilizes membrane potential). Rodent anterodorsal and anterolateral BNST neurons are also critical regulators of behavior, including avoidance of aversive contexts and fear learning (especially that of sustained threats). These rodent behaviors are historically associated with anxiety. Furthermore, BNST is implicated in stress-related mood disorders, including anxiety and Post-Traumatic Stress Disorders in humans, and may be linked to sex differences found in mood disorders.
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Affiliation(s)
- Isabella Maita
- Samuels Laboratory, Department of Psychology, Behavioral and Systems Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, United States,Neuroscience Graduate Program, Rutgers, The State University of New Jersey, Piscataway, NJ, United States
| | - Troy A. Roepke
- Roepke Laboratory, Department of Animal Sciences, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
| | - Benjamin A. Samuels
- Samuels Laboratory, Department of Psychology, Behavioral and Systems Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, United States,*Correspondence: Benjamin A. Samuels,
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Sleat DE, Maita I, Banach-Petrosky W, Larrimore KE, Liu T, Cruz D, Baker L, Maxfield FR, Samuels B, Lobel P. Elevated levels of tripeptidyl peptidase 1 do not ameliorate pathogenesis in a mouse model of Alzheimer disease. Neurobiol Aging 2022; 118:106-107. [PMID: 35914472 DOI: 10.1016/j.neurobiolaging.2022.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 06/14/2022] [Accepted: 06/30/2022] [Indexed: 10/17/2022]
Abstract
One potential therapeutic strategy for Alzheimer disease (AD) is to promote degradation of amyloid beta (Aβ) and we previously demonstrated that the lysosomal protease tripeptidyl peptidase 1 (TPP1) can degrade Aβ fibrils in vitro. In this study, we tested the hypothesis that increasing levels of TPP1 might promote degradation of Aβ under physiological conditions, slowing or preventing its accumulation in the brain with subsequent therapeutic benefits. We used 2 approaches to increase TPP1 activity in the brain of J20 mice, an AD model that accumulates Aβ and exhibits cognitive defects: transgenic overexpression of TPP1 in the brain and a pharmacological approach employing administration of recombinant TPP1. While we clearly observed the expected AD phenotype of the J20 mice based on pathology and measurement of behavioral and cognitive defects, we found that elevation of TPP1 activity by either experimental approach failed to have any measurable beneficial effect on disease phenotype.
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Affiliation(s)
- David E Sleat
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, USA; Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers Biomedical Health Sciences, Rutgers University, Piscataway, NJ, USA
| | - Isabella Maita
- Behavioral and Systems Neuroscience, Department of Psychology, Rutgers University-New Brunswick, Piscataway, NJ, USA; Neuroscience Graduate Program, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ, USA
| | | | - Katherine E Larrimore
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, USA
| | - Tonia Liu
- Behavioral and Systems Neuroscience, Department of Psychology, Rutgers University-New Brunswick, Piscataway, NJ, USA
| | - Dana Cruz
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, USA
| | - Lukas Baker
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, USA
| | | | - Benjamin Samuels
- Behavioral and Systems Neuroscience, Department of Psychology, Rutgers University-New Brunswick, Piscataway, NJ, USA; Neuroscience Graduate Program, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ, USA
| | - Peter Lobel
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ, USA; Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, Rutgers Biomedical Health Sciences, Rutgers University, Piscataway, NJ, USA
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Maita I, Bazer A, Blackford JU, Samuels BA. Functional anatomy of the bed nucleus of the stria terminalis-hypothalamus neural circuitry: Implications for valence surveillance, addiction, feeding, and social behaviors. Handb Clin Neurol 2021; 179:403-418. [PMID: 34225978 DOI: 10.1016/b978-0-12-819975-6.00026-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The bed nucleus of the stria terminalis (BNST) is a medial basal forebrain structure that modulates the hypothalamo-pituitary-adrenal (HPA) axis. The heterogeneous subnuclei of the BNST integrate inputs from mood and reward-related areas and send direct inhibitory projections to the hypothalamus. The connections between the BNST and hypothalamus are conserved across species, promote activation of the HPA axis, and can increase avoidance of aversive environments, which is historically associated with anxiety behaviors. However, BNST-hypothalamus circuitry is also implicated in motivated behaviors, drug seeking, feeding, and sexual behavior. These complex and diverse roles, as well its sexual dimorphism, indicate that the BNST-hypothalamus circuitry is an essential component of the neural circuitry that may underlie various psychiatric diseases, ranging from anorexia to anxiety to addiction. The following review is a cross-species exploration of BNST-hypothalamus circuitry. First, we describe the BNST subnuclei, microcircuitry and complex reciprocal connections with the hypothalamus. We will then discuss the behavioral functions of BNST-hypothalamus circuitry, including valence surveillance, addiction, feeding, and social behavior. Finally, we will address sex differences in morphology and function of the BNST and hypothalamus.
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Affiliation(s)
- Isabella Maita
- Department of Psychology, Rutgers University, Piscataway, NJ, United States
| | - Allyson Bazer
- Department of Psychology, Rutgers University, Piscataway, NJ, United States
| | - Jennifer Urbano Blackford
- Department of Psychiatry and Behavioral Sciences, Vanderbilt University Medical Center, Nashville, TN, United States; Research Health Scientist, Tennessee Valley HealthCare System, US Department of Veterans Affairs, Nashville, TN, United States
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Hu P, Maita I, Phan ML, Gu E, Kwok C, Dieterich A, Gergues MM, Yohn CN, Wang Y, Zhou JN, Qi XR, Swaab DF, Pang ZP, Lucassen PJ, Roepke TA, Samuels BA. Early-life stress alters affective behaviors in adult mice through persistent activation of CRH-BDNF signaling in the oval bed nucleus of the stria terminalis. Transl Psychiatry 2020; 10:396. [PMID: 33177511 PMCID: PMC7658214 DOI: 10.1038/s41398-020-01070-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 09/15/2020] [Accepted: 10/07/2020] [Indexed: 01/06/2023] Open
Abstract
Early-life stress (ELS) leads to stress-related psychopathology in adulthood. Although dysfunction of corticotropin-releasing hormone (CRH) signaling in the bed nucleus of the stria terminalis (BNST) mediates chronic stress-induced maladaptive affective behaviors that are historically associated with mood disorders such as anxiety and depression, it remains unknown whether ELS affects CRH function in the adult BNST. Here we applied a well-established ELS paradigm (24 h maternal separation (MS) at postnatal day 3) and assessed the effects on CRH signaling and electrophysiology in the oval nucleus of BNST (ovBNST) of adult male mouse offspring. ELS increased maladaptive affective behaviors, and amplified mEPSCs and decreased M-currents (a voltage-gated K+ current critical for stabilizing membrane potential) in ovBNST CRH neurons, suggesting enhanced cellular excitability. Furthermore, ELS increased the numbers of CRH+ and PACAP+ (the pituitary adenylate cyclase-activating polypeptide, an upstream CRH regulator) cells and decreased STEP+ (striatal-enriched protein tyrosine phosphatase, a CRH inhibitor) cells in BNST. Interestingly, ELS also increased BNST brain-derived neurotrophic factor (BDNF) expression, indicating enhanced neuronal plasticity. These electrophysiological and behavioral effects of ELS were reversed by chronic application of the CRHR1-selective antagonist R121919 into ovBNST, but not when BDNF was co-administered. In addition, the neurophysiological effects of BDNF on M-currents and mEPSCs in BNST CRH neurons mimic effects and were abolished by PKC antagonism. Together, our findings indicate that ELS results in a long-lasting activation of CRH signaling in the mouse ovBNST. These data highlight a regulatory role of CRHR1 in the BNST and for BDNF signaling in mediating ELS-induced long-term behavioral changes.
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Affiliation(s)
- Pu Hu
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
| | - Isabella Maita
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
| | - Mimi L. Phan
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
| | - Edward Gu
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
| | - Christopher Kwok
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
| | - Andrew Dieterich
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
| | - Mark M. Gergues
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA ,grid.266102.10000 0001 2297 6811Present Address: Neuroscience Graduate Program, University of California, San Francisco, San Francisco, CA 94158 USA
| | - Christine N. Yohn
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
| | - Yu Wang
- grid.59053.3a0000000121679639CAS Key Laboratory of Brain Function and Diseases, Life Science School, University of Science and Technology of China, Hefei, 230027 China
| | - Jiang-Ning Zhou
- grid.59053.3a0000000121679639CAS Key Laboratory of Brain Function and Diseases, Life Science School, University of Science and Technology of China, Hefei, 230027 China
| | - Xin-Rui Qi
- grid.412538.90000 0004 0527 0050Center for Translational Neurodegeneration and Regenerative Therapy, Shanghai Tenth People’s Hospital Affiliated to Tongji University School of Medicine, Shanghai, 200072 China
| | - Dick F. Swaab
- grid.418101.d0000 0001 2153 6865Department of Neuropsychiatric Disorders, Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Academy of Arts and Sciences, Meibergdreef, Amsterdam 1105 BA The Netherlands
| | - Zhiping P. Pang
- grid.430387.b0000 0004 1936 8796Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901 USA
| | - Paul J. Lucassen
- grid.7177.60000000084992262Brain Plasticity Group, Swammerdam Institute for Life Sciences, Center for Neuroscience, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | - Troy A. Roepke
- grid.430387.b0000 0004 1936 8796Department of Animal Sciences, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901 USA
| | - Benjamin A. Samuels
- grid.430387.b0000 0004 1936 8796Department of Psychology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA
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Yohn CN, Dieterich A, Maita I, Bazer AS, Diethorn E, Ma D, Gergues MM, Hu P, Samuels BA. Behavioral response to fluoxetine in both female and male mice is modulated by dentate gyrus granule cell activity. Neurobiol Stress 2020; 13:100257. [PMID: 33344712 PMCID: PMC7739193 DOI: 10.1016/j.ynstr.2020.100257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/08/2020] [Accepted: 10/11/2020] [Indexed: 12/28/2022] Open
Abstract
Depression is a complex psychiatric disorder that is a major burden on society, with only ~33% of depressed patients attaining remission upon initial monotherapy with a selective serotonin reuptake inhibitor (SSRI). In preclinical studies using rodents, chronic stress paradigms, such as chronic corticosterone and social instability stress, are used to induce avoidance behaviors associated with negative affective states. Chronic fluoxetine (FLX; an SSRI) treatment reverses these chronic stress-induced behavioral changes in some, but not all mice, permitting stratification of mice into behavioral responders and non-responders to FLX. We previously reported that 5-HT1A receptors, which are Gi-coupled inhibitory receptors, on mature granule cells (GCs) in the dentate gyrus (DG) are necessary and sufficient for the behavioral, neurogenic, and neuroendocrine response to chronic SSRI treatment. Since inhibition of mature DG GCs through cell autonomous Gi-coupled receptors is critical for mounting an antidepressant response, we assessed the relationship between behavioral response to FLX and DG GC activation in FLX responders, non-responders, and stress controls in both male and female mice. Intriguingly, using disparate stress paradigms, we found that male and female behavioral FLX responders show decreased DG GC activation (as measured by cFos immunostaining) relative to non-responders and stress controls. We then show in both sexes that chronic inhibition of ventral DG GCs (through usage of Gi-DREADDs) results in a decrease in maladaptive avoidance behaviors, while ventral DG GCs stimulation with Gq-DREADDs increases maladaptive behaviors. Finally, we were able to bidirectionally control the behavioral response to FLX through modulation of DG GCs. Chronic inhibition of ventral DG GCs with Gi-DREADDs converted FLX non-responders into responders, while activation of ventral DG GCs with Gq-DREADDs converted FLX responders into non-responders. This study illustrates ventral DG GC activity is a major modulator of the behavioral response to FLX in both male and female mice.
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Affiliation(s)
| | - Andrew Dieterich
- Neuroscience Graduate Program, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, USA
| | - Isabella Maita
- Neuroscience Graduate Program, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, USA
| | - Allyson S. Bazer
- Behavioral & Systems Neuroscience, Department of Psychology, USA
| | - Emma Diethorn
- Behavioral & Systems Neuroscience, Department of Psychology, USA
| | - Debbie Ma
- Behavioral & Systems Neuroscience, Department of Psychology, USA
| | - Mark M. Gergues
- Behavioral & Systems Neuroscience, Department of Psychology, USA
| | - Pu Hu
- Behavioral & Systems Neuroscience, Department of Psychology, USA
| | - Benjamin A. Samuels
- Behavioral & Systems Neuroscience, Department of Psychology, USA
- Neuroscience Graduate Program, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, USA
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Yohn CN, Dieterich A, Bazer AS, Maita I, Giedraitis M, Samuels BA. Chronic non-discriminatory social defeat is an effective chronic stress paradigm for both male and female mice. Neuropsychopharmacology 2019; 44:2220-2229. [PMID: 31493767 PMCID: PMC6898575 DOI: 10.1038/s41386-019-0520-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/08/2019] [Accepted: 08/29/2019] [Indexed: 01/24/2023]
Abstract
Stress-related mood disorders are more prevalent in females than males, yet preclinical chronic stress paradigms were developed in male rodents and are less effective in female rodents. Here we characterize a novel chronic non-discriminatory social defeat stress (CNSDS) paradigm that results in comparable stress effects in both sexes. Male and female C57BL/6J mice were simultaneously introduced into the home cage of resident CD-1 aggressors for 10 daily 5-min sessions. CD-1 aggressors attacked males and females indiscriminately, resulting in stress resilient and susceptible subpopulations in both sexes. CD-1 aggressors attacked C57BL/6J male intruders faster and more frequently than female intruders. However, CNSDS similarly induced negative valence behaviors in SUS mice of both sexes relative to RES and CNTRL mice. Furthermore, SUS male and female mice displayed similar increases in plasma corticosterone levels following CNSDS exposure relative to pre-stress exposure levels. The estrous cycle did not impact CD-1 attack behavior or negative valence behaviors. Thus, CNSDS induces chronic stress behavioral and neuroendocrine effects in both male and female C57BL/6J mice and allows direct comparisons between sexes. Adoption of this modified social defeat paradigm will help advance the initiative to include female rodents in preclinical chronic stress research.
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Affiliation(s)
- Christine N Yohn
- Department of Psychology, Behavioral and Systems Neuroscience Area, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, 08854, USA.
| | - Andrew Dieterich
- Department of Psychology, Behavioral and Systems Neuroscience Area, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, 08854, USA
- Graduate Program in Neuroscience, Rutgers, The State University of New Jersey, New Brunswick, Piscataway, NJ, 08854, USA
| | - Allyson S Bazer
- Department of Psychology, Behavioral and Systems Neuroscience Area, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, 08854, USA
| | - Isabella Maita
- Department of Psychology, Behavioral and Systems Neuroscience Area, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, 08854, USA
- Graduate Program in Neuroscience, Rutgers, The State University of New Jersey, New Brunswick, Piscataway, NJ, 08854, USA
| | - Megan Giedraitis
- Department of Psychology, Behavioral and Systems Neuroscience Area, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, 08854, USA
| | - Benjamin Adam Samuels
- Department of Psychology, Behavioral and Systems Neuroscience Area, Rutgers, The State University of New Jersey, 152 Frelinghuysen Rd, Piscataway, NJ, 08854, USA.
- Graduate Program in Neuroscience, Rutgers, The State University of New Jersey, New Brunswick, Piscataway, NJ, 08854, USA.
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Teng S, Palmieri A, Maita I, Zheng C, Das G, Park J, Zhou R, Alder J, Thakker-Varia S. Inhibition of EphA/Ephrin-A signaling using genetic and pharmacologic approaches improves recovery following traumatic brain injury in mice. Brain Inj 2019; 33:1385-1401. [DOI: 10.1080/02699052.2019.1641622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Shavonne Teng
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
| | - Alicia Palmieri
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
| | - Isabella Maita
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
| | - Cynthia Zheng
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
| | - Gitanjali Das
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - Juyeon Park
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
| | - Renping Zhou
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, USA
| | - Janet Alder
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
| | - Smita Thakker-Varia
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, New Jersey, USA
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Saré RM, Song A, Loutaev I, Cook A, Maita I, Lemons A, Sheeler C, Smith CB. Negative Effects of Chronic Rapamycin Treatment on Behavior in a Mouse Model of Fragile X Syndrome. Front Mol Neurosci 2018; 10:452. [PMID: 29375310 PMCID: PMC5770365 DOI: 10.3389/fnmol.2017.00452] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 12/22/2017] [Indexed: 01/08/2023] Open
Abstract
Fragile X syndrome (FXS), the most common form of inherited intellectual disability, is also highly associated with autism spectrum disorders (ASD). It is caused by expansion of a CGG repeat sequence on the X chromosome resulting in silencing of the FMR1 gene. This is modeled in the mouse by deletion of Fmr1 (Fmr1 KO). Fmr1 KO mice recapitulate many of the behavioral features of the disorder including seizure susceptibility, hyperactivity, impaired social behavior, sleep problems, and learning and memory deficits. The mammalian target of rapamycin pathway (mTORC1) is upregulated in Fmr1 KO mice and is thought to be important for the pathogenesis of this disorder. We treated Fmr1 KO mice chronically with an mTORC1 inhibitor, rapamycin, to determine if rapamycin treatment could reverse behavioral phenotypes. We performed open field, zero maze, social behavior, sleep, passive avoidance, and audiogenic seizure testing. We found that pS6 was upregulated in Fmr1 KO mice and normalized by rapamycin treatment, but, except for an anxiogenic effect, it did not reverse any of the behavioral phenotypes examined. In fact, rapamycin treatment had an adverse effect on sleep and social behavior in both control and Fmr1 KO mice. These results suggest that targeting the mTOR pathway in FXS is not a good treatment strategy and that other pathways should be considered.
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Affiliation(s)
- Rachel M Saré
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, United States
| | - Alex Song
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, United States
| | - Inna Loutaev
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, United States
| | - Anna Cook
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, United States
| | - Isabella Maita
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, United States
| | - Abigail Lemons
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, United States
| | - Carrie Sheeler
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, United States
| | - Carolyn B Smith
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, United States Department of Health and Human Services, Bethesda, MD, United States
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