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Khan H, Naseem T, Kaushik P, Narang J, Khan R, Panwar S, Parvez S. Decoding Paradoxical Links of Cytokine Markers in Cognition: Cross talk between Physiology, Inflammaging, and Alzheimer's Disease- Related Cognitive Decline. Ageing Res Rev 2024:102535. [PMID: 39374831 DOI: 10.1016/j.arr.2024.102535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2024] [Revised: 09/29/2024] [Accepted: 10/01/2024] [Indexed: 10/09/2024]
Abstract
Recent research has revolutionized our understanding of memory consolidation by emphasizing the critical role of astrocytes, microglia, and immune cells in through cytokine signaling. Cytokines, compact proteins, play pivotal roles in neuronal development, synaptic transmission, and normal aging. This review explores the cellular mechanisms contributing to cognitive decline in inflammaging and Alzheimer's disease, highlighting the paradoxical effects of most studied cytokines (IL-1, IL-6, TNF-α) in brain function, which act as a double-edged sword in brain physiology, acting both as facilitators of healthy cognitive function and as a potential contributor to cognitive decline.
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Affiliation(s)
- Hiba Khan
- Department of Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110062, India
| | - Talib Naseem
- Department of Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110062, India
| | - Pooja Kaushik
- Department of Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110062, India
| | - Jagriti Narang
- Department of Biotechnology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110062, India
| | - Rehan Khan
- Chemical Biology Unit, Institute of Nano Science and Technology, Sector 81, Knowledge City, Sahibzada Ajit Singh Nagar, Mohali, Punjab, 140306, India
| | - Siddharth Panwar
- School of Computing and Electrical Engineering, Indian Institute of Technology, Mandi, Himachal Pradesh 175075, India
| | - Suhel Parvez
- Department of Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi 110062, India.
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King C, Rogers LG, Jansen J, Sivayokan B, Neyhard J, Warnes E, Hall SE, Plakke B. Adolescent treadmill exercise enhances hippocampal brain-derived neurotrophic factor (BDNF) expression and improves cognition in autism-modeled rats. Physiol Behav 2024; 284:114638. [PMID: 39004196 DOI: 10.1016/j.physbeh.2024.114638] [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: 06/03/2024] [Revised: 06/27/2024] [Accepted: 07/09/2024] [Indexed: 07/16/2024]
Abstract
Autism spectrum disorder (ASD) is a prevalent neurodevelopmental disorder characterized by repetitive behaviors and altered communication abilities. Exercise is a low-cost intervention that could improve cognitive function and improve brain plasticity mechanisms. Here, the valproic acid (VPA) model was utilized to induce ASD-like phenotypes in rodents. Animals were exercised on a treadmill and performance was evaluated on a cognitive flexibility task. Biomarkers related to exercise and plasticity regulation were quantified from the prefrontal cortex, hippocampus, and skeletal muscle. Exercised VPA animals had higher levels of hippocampal BDNF compared to sedentary VPA animals and upregulated antioxidant enzyme expression in skeletal muscle. Cognitive improvements were demonstrated in both sexes, but in different domains of cognitive flexibility. This research demonstrates the benefits of exercise and provides evidence that molecular responses to exercise occur in both the central nervous system and in the periphery. These results suggest that improving regulation of BDNF via exercise, even at low intensity, could provide better synaptic regulation and cognitive benefits for individuals with ASD.
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Affiliation(s)
- Cole King
- Department of Psychological Sciences, Kansas State University, Manhattan, KS, 66506, USA
| | - Liza G Rogers
- Anatomy and Physiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Jeremy Jansen
- Department of Psychological Sciences, Kansas State University, Manhattan, KS, 66506, USA
| | - Bhavana Sivayokan
- Department of Psychological Sciences, Kansas State University, Manhattan, KS, 66506, USA
| | - Jenna Neyhard
- Department of Psychological Sciences, Kansas State University, Manhattan, KS, 66506, USA
| | - Ellie Warnes
- Department of Psychological Sciences, Kansas State University, Manhattan, KS, 66506, USA
| | - Stephanie E Hall
- Anatomy and Physiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Bethany Plakke
- Department of Psychological Sciences, Kansas State University, Manhattan, KS, 66506, USA.
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3
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Avgana H, Toledano RS, Akirav I. Examining the Role of Oxytocinergic Signaling and Neuroinflammatory Markers in the Therapeutic Effects of MDMA in a Rat Model for PTSD. Pharmaceuticals (Basel) 2024; 17:846. [PMID: 39065697 PMCID: PMC11279644 DOI: 10.3390/ph17070846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 06/20/2024] [Accepted: 06/25/2024] [Indexed: 07/28/2024] Open
Abstract
MDMA-assisted psychotherapy has shown potential as an effective treatment for post-traumatic stress disorder (PTSD). Preclinical studies involving rodents have demonstrated that MDMA can facilitate the extinction of fear memories. It has been noted that MDMA impacts oxytocin neurons and pro-inflammatory cytokines. Thus, the aim of this study was to explore the role of oxytocinergic signaling and neuroinflammatory markers in the therapeutic effects of MDMA. To achieve this, male rats were subjected to a model of PTSD involving exposure to shock and situational reminders. MDMA was microinjected into the medial prefrontal cortex (mPFC) before extinction training, followed by behavioral tests assessing activity levels, anxiety, and social function. Our findings indicate that MDMA treatment facilitated fear extinction and mitigated the shock-induced increase in freezing, as well as deficits in social behavior. Shock exposure led to altered expression of the gene coding for OXT-R and neuroinflammation in the mPFC and basolateral amygdala (BLA), which were restored by MDMA treatment. Importantly, the OXT-R antagonist L-368,899 prevented MDMA's therapeutic effects on extinction and freezing behavior. In conclusion, MDMA's therapeutic effects in the PTSD model are associated with alterations in OXT-R expression and neuroinflammation, and MDMA's effects on extinction and anxiety may be mediated by oxytocinergic signaling.
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Affiliation(s)
- Haron Avgana
- Department of Psychology, School of Psychological Sciences, University of Haifa, Haifa 3498838, Israel; (H.A.); (R.S.T.)
- The Integrated Brain and Behavior Research Center (IBBRC), University of Haifa, Haifa 3498838, Israel
| | - Roni Shira Toledano
- Department of Psychology, School of Psychological Sciences, University of Haifa, Haifa 3498838, Israel; (H.A.); (R.S.T.)
- The Integrated Brain and Behavior Research Center (IBBRC), University of Haifa, Haifa 3498838, Israel
| | - Irit Akirav
- Department of Psychology, School of Psychological Sciences, University of Haifa, Haifa 3498838, Israel; (H.A.); (R.S.T.)
- The Integrated Brain and Behavior Research Center (IBBRC), University of Haifa, Haifa 3498838, Israel
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Li J, Haj Ebrahimi A, Ali AB. Advances in Therapeutics to Alleviate Cognitive Decline and Neuropsychiatric Symptoms of Alzheimer's Disease. Int J Mol Sci 2024; 25:5169. [PMID: 38791206 PMCID: PMC11121252 DOI: 10.3390/ijms25105169] [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: 04/09/2024] [Revised: 05/02/2024] [Accepted: 05/06/2024] [Indexed: 05/26/2024] Open
Abstract
Dementia exists as a 'progressive clinical syndrome of deteriorating mental function significant enough to interfere with activities of daily living', with the most prevalent type of dementia being Alzheimer's disease (AD), accounting for about 80% of diagnosed cases. AD is associated with an increased risk of comorbidity with other clinical conditions such as hypertension, diabetes, and neuropsychiatric symptoms (NPS) including, agitation, anxiety, and depression as well as increased mortality in late life. For example, up to 70% of patients diagnosed with AD are affected by anxiety. As aging is the major risk factor for AD, this represents a huge global burden in ageing populations. Over the last 10 years, significant efforts have been made to recognize the complexity of AD and understand the aetiology and pathophysiology of the disease as well as biomarkers for early detection. Yet, earlier treatment options, including acetylcholinesterase inhibitors and glutamate receptor regulators, have been limited as they work by targeting the symptoms, with only the more recent FDA-approved drugs being designed to target amyloid-β protein with the aim of slowing down the progression of the disease. However, these drugs may only help temporarily, cannot stop or reverse the disease, and do not act by reducing NPS associated with AD. The first-line treatment options for the management of NPS are selective serotonin reuptake inhibitors/selective noradrenaline reuptake inhibitors (SSRIs/SNRIs) targeting the monoaminergic system; however, they are not rational drug choices for the management of anxiety disorders since the GABAergic system has a prominent role in their development. Considering the overall treatment failures and side effects of currently available medication, there is an unmet clinical need for rationally designed therapies for anxiety disorders associated with AD. In this review, we summarize the current status of the therapy of AD and aim to highlight novel angles for future drug therapy in our ongoing efforts to alleviate the cognitive deficits and NPS associated with this devastating disease.
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Affiliation(s)
| | | | - Afia B. Ali
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK; (J.L.); (A.H.E.)
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Dong H, Wang S, Hu C, Wang M, Zhou T, Zhou Y. Neuroprotective Effects of Intermittent Fasting in the Aging Brain. ANNALS OF NUTRITION & METABOLISM 2024; 80:175-185. [PMID: 38631305 DOI: 10.1159/000538782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 04/06/2024] [Indexed: 04/19/2024]
Abstract
BACKGROUND A major risk factor for neurodegenerative disorders is old age. Nutritional interventions that delay aging, such as calorie restriction (CR) and intermittent fasting (IF), as well as pharmaceuticals that affect the pathways linking nutrition and aging processes, have been developed in recent decades and have been shown to alleviate the effects of aging on the brain. SUMMARY CR is accomplished by alternating periods of ad libitum feeding and fasting. In animal models, IF has been shown to increase lifespan and slow the progression and severity of age-related pathologies such as cardiovascular and neurodegenerative diseases and cancer. According to recent research, dietary changes can help older people with dementia retain brain function. However, the mechanisms underlying the neuroprotective effect of IF on the aging brain and related questions in this area of study (i.e., the potential of IF to treat neurodegenerative disorders) remain to be examined. KEY MESSAGES This review addresses the hypothesis that IF may have translational potential in protecting the aged brain while summarizing the research supporting the putative neuroprotective mechanisms of IF in animal models. Additionally, given the emerging understanding of the connection between aging and dementia, our investigations may offer a fresh perspective on the use of dietary interventions for enhancing brain function and preventing dementia in elderly individuals. Finally, the absence of guidelines regarding the application of IF in patients hampers its broad utilization in clinical practice, and further studies are needed to improve our knowledge of the long-term effects of IF on dementia before it can be widely prescribed. In conclusion, IF may be an ancillary intervention for preserving memory and cognition in elderly individuals.
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Affiliation(s)
- Hao Dong
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, China
| | - Shiyan Wang
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, China
| | - Chenji Hu
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, China
| | - Mao Wang
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, China
| | - Tao Zhou
- Department of Pharmaceutical and Medical Equipment, Ba Yi Orthopedic Hospital, Chengdu, China
| | - Yue Zhou
- Department of Pharmacy, Xindu District People's Hospital of Chengdu, Chengdu, China
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Simonetti A, Restaino A, Bernardi E, Ferrara OM, Margoni S, D’Onofrio AM, Ranieri F, Janiri D, Galluzzo V, Tosato M, Kotzalidis GD, Landi F, Sani G. Effect of Anti-Interleukin-6 Agents on Psychopathology in a Sample of Patients with Post-COVID-19 Syndrome: An Observational Study. Brain Sci 2024; 14:47. [PMID: 38248262 PMCID: PMC10813526 DOI: 10.3390/brainsci14010047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/23/2024] Open
Abstract
Interleukin 6 (IL-6) receptor inhibitors tocilizumab and sarilumab have recently been approved for severe coronavirus disease 2019 (COVID-19). They also affect mood, even though their effect on the post-COVID-19 syndrome-related psychopathology still has to be investigated. The aim of this study was to investigate their effect on psychopathology in a sample of patients with post-COVID-19 syndrome. We included 246 patients (34% female, 66% male) aged 18-75 years who had been hospitalized for COVID. Patients were split into those who received anti-IL-6 receptor agents (Anti-IL-6-R, N = 88) and those who did not (Ctrl, N = 158). The former group was further split into those receiving tocilizumab (TOC, N = 67) and those receiving sarilumab (SAR, N = 21). Groups were compared based on clinical characteristics before and during COVID-19 as well as on physical and psychiatric symptoms after COVID-19. Ctrl had less psychiatric and physical symptoms during hospitalization and more post-COVID-19 diarrhea, headache, cough, and dyspnea upon exertion than those receiving IL-6-receptor inhibitors. Ctrl also showed greater difficulties in emotion regulation. These differences were driven by TOC vs. Ctrl, whereas differences between SAR and Ctrl or TOC did not reach significance. IL-6 receptor inhibitors are related to a lower post-COVID-19 illness burden and seem to be effective in emotion regulation. Further research is needed to confirm these findings.
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Affiliation(s)
- Alessio Simonetti
- Department of Neuroscience, Section of Psychiatry, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy; (D.J.); (G.S.)
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, 1977 Butler Blvd., Houston, TX 77030, USA
| | - Antonio Restaino
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Evelina Bernardi
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Ottavia Marianna Ferrara
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Stella Margoni
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Antonio Maria D’Onofrio
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
| | - Federica Ranieri
- Department of Psychiatry, University of Campania Luigi Vanvitelli, 80138 Naples, Italy;
| | - Delfina Janiri
- Department of Neuroscience, Section of Psychiatry, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy; (D.J.); (G.S.)
| | - Vincenzo Galluzzo
- Department of Geriatrics, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (V.G.); (M.T.); (F.L.)
| | - Matteo Tosato
- Department of Geriatrics, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (V.G.); (M.T.); (F.L.)
- NESMOS (Neurosciences, Mental Health, and Sensory Organs) Department, Faculty of Medicine and Psychology, Sant’Andrea Hospital, Sapienza Università di Roma, Via di Grottarossa 1035-1039, 00189 Rome, Italy
| | - Georgios D. Kotzalidis
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
- NESMOS (Neurosciences, Mental Health, and Sensory Organs) Department, Faculty of Medicine and Psychology, Sant’Andrea Hospital, Sapienza Università di Roma, Via di Grottarossa 1035-1039, 00189 Rome, Italy
| | - Francesco Landi
- Department of Geriatrics, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy; (V.G.); (M.T.); (F.L.)
- Department of Geriatrics, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Gabriele Sani
- Department of Neuroscience, Section of Psychiatry, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy; (D.J.); (G.S.)
- Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (A.R.); (E.B.); (O.M.F.); (S.M.); (A.M.D.); (G.D.K.)
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Ruck L, Wiegand S, Kühnen P. Relevance and consequence of chronic inflammation for obesity development. Mol Cell Pediatr 2023; 10:16. [PMID: 37957462 PMCID: PMC10643747 DOI: 10.1186/s40348-023-00170-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
BACKGROUND Increasing prevalence of morbid obesity accompanied by comorbidities like type 2 diabetes mellitus (T2DM) led to a demand for improving therapeutic strategies and pharmacological intervention options. Apart from genetics, inflammation processes have been hypothesized to be of importance for the development of obesity and related aspects like insulin resistance. MAIN TEXT Within this review, we provide an overview of the intricate interplay between chronic inflammation of the adipose tissue and the hypothalamus and the development of obesity. Further understanding of this relationship might improve the understanding of the underlying mechanism and may be of relevance for the establishment of new treatment strategies.
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Affiliation(s)
- Lisa Ruck
- Klinik Für Pädiatrische Endokrinologie und Diabetologie, Charité Universitätsmedizin, Berlin, Germany.
- Berlin Institute of Health at Charité-Universitätsmedizin Berlin, BIH Biomedical Innovation Academy, BIH Charité Junior Clinician Scientist Program, Charitéplatz 1, 10117, Berlin, Germany.
| | - Susanna Wiegand
- Abteilung Interdisziplinär, Sozial-Pädiatrisches Zentrum, Charité Universitätsmedizin, Berlin, Germany
| | - Peter Kühnen
- Klinik Für Pädiatrische Endokrinologie und Diabetologie, Charité Universitätsmedizin, Berlin, Germany
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Gruol DL, Calderon D, Huitron-Resendiz S, Cates-Gatto C, Roberts AJ. Impact of Elevated Brain IL-6 in Transgenic Mice on the Behavioral and Neurochemical Consequences of Chronic Alcohol Exposure. Cells 2023; 12:2306. [PMID: 37759527 PMCID: PMC10527024 DOI: 10.3390/cells12182306] [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: 04/11/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/29/2023] Open
Abstract
Alcohol consumption activates the neuroimmune system of the brain, a system in which brain astrocytes and microglia play dominant roles. These glial cells normally produce low levels of neuroimmune factors, which are important signaling factors and regulators of brain function. Alcohol activation of the neuroimmune system is known to dysregulate the production of neuroimmune factors, such as the cytokine IL-6, thereby changing the neuroimmune status of the brain, which could impact the actions of alcohol. The consequences of neuroimmune-alcohol interactions are not fully known. In the current studies we investigated this issue in transgenic (TG) mice with altered neuroimmune status relative to IL-6. The TG mice express elevated levels of astrocyte-produced IL-6, a condition known to occur with alcohol exposure. Standard behavioral tests of alcohol drinking and negative affect/emotionality were carried out in homozygous and heterozygous TG mice and control mice to assess the impact of neuroimmune status on the actions of chronic intermittent alcohol (ethanol) (CIE) exposure on these behaviors. The expressions of signal transduction and synaptic proteins were also assessed by Western blot to identify the impact of alcohol-neuroimmune interactions on brain neurochemistry. The results from these studies show that neuroimmune status with respect to IL-6 significantly impacts the effects of alcohol on multiple levels.
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Affiliation(s)
- Donna L. Gruol
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Delilah Calderon
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037, USA
| | | | - Chelsea Cates-Gatto
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA 92037, USA (A.J.R.)
| | - Amanda J. Roberts
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA 92037, USA (A.J.R.)
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Vilela WR, Bellozi PMQ, Picolo VL, Cavadas BN, Marques KVS, Pereira LTG, Guirao ARDY, Amato AA, Magalhães KG, Mortari MR, Medei EH, Goulart JT, de Bem AF. Early-life metabolic dysfunction impairs cognition and mitochondrial function in mice. J Nutr Biochem 2023; 117:109352. [PMID: 37061011 DOI: 10.1016/j.jnutbio.2023.109352] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 03/10/2023] [Accepted: 04/10/2023] [Indexed: 04/17/2023]
Abstract
The impact of overnutrition early in life is not restricted to the onset of cardiovascular and metabolic diseases, but also affects critical brain functions related to cognition. This study aimed to evaluate the relationship between peripheral metabolic and bioenergetic changes induced by a two-hit protocol and their impact on cognitive function in juvenile mice. Three-week-old male C57BL/6 mice received a high-fat diet (HFD) or control diet for 7 weeks, associated with 2 low doses of streptozotocin (STZ) or vehicle. Despite the absence of obesity, HFD+STZ impaired glucose metabolism and induced a trend towards cholesterol increase. The two-hit protocol impaired recognition and spatial memories in juvenile mice, without inducing a depressive-like behavior. HFD+STZ mice presented increased immunoreactivity for GFAP and a trend towards a decrease in NeuN in the hippocampus. The treatment caused a bioenergetic impairment in the hippocampus, characterized by a decrease in both O2 consumption related to ATP production and in the maximum respiratory capacity. The thermogenic capacity of brown adipose tissue was impaired by the two-hit protocol, here verified through the absence of a decrease in O2 consumption after uncoupled protein-1 inhibition and an increase in the reserve respiratory capacity. Impaired mitochondrial function was also observed in the liver of HFD+STZ juvenile mice, but not in their heart. These results indicate that exposure to HFD+STZ early in life has a detrimental impact on the bioenergetic and mitochondrial function of tissues with metabolic and thermogenic activities, which is likely related to hippocampal metabolic changes and cognitive impairment.
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Affiliation(s)
- Wembley Rodrigues Vilela
- Laboratory of Bioenergetics and Metabolism, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil
| | - Paula Maria Quaglio Bellozi
- Laboratory of Bioenergetics and Metabolism, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil
| | - Victor Luna Picolo
- Laboratory of Bioenergetics and Metabolism, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil
| | - Bruna Neves Cavadas
- Laboratory of Bioenergetics and Metabolism, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil
| | - Keila Valentina Silva Marques
- Laboratory of Bioenergetics and Metabolism, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil
| | | | - Ainhoa Rodriguez de Yurre Guirao
- Laboratory of Cardioimunology, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Angélica Amorim Amato
- Laboratory of Molecular Pharmacology, School of Health Sciences, University of Brasilia, Brazil
| | - Kelly Grace Magalhães
- Laboratory of Immunology and Inflammation, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil
| | - Márcia Renata Mortari
- Laboratory of Neuropharmacology, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil
| | - Emiliano Horacio Medei
- Laboratory of Cardioimunology, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jair Trapé Goulart
- Laboratory of Bioenergetics and Metabolism, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil.
| | - Andreza Fabro de Bem
- Laboratory of Bioenergetics and Metabolism, Department of Physiological Sciences, Biology Institute, University of Brasilia, Federal District, Brazil; Center of Social and Affective Neuroscience, Department of Clinical and Experimental Medicine, Faculty of Medicine and Health, Linköping University, Linköping, Sweden.
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Maternal stress and vulnerability to depression: coping and maternal care strategies and its consequences on adolescent offspring. Transl Psychiatry 2022; 12:463. [PMID: 36333302 PMCID: PMC9636172 DOI: 10.1038/s41398-022-02220-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 09/30/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022] Open
Abstract
Depressive mothers often find mother-child interaction to be challenging. Maternal stress may further impair mother-child attachment, which may increase the risk of negative developmental consequences. We used rats with different vulnerability to depressive-like behavior (Wistar and Kyoto) to investigate the impact of stress (maternal separation-MS) on maternal behavior and adolescent offspring cognition. MS in Kyoto dams increased pup-contact, resulting in higher oxytocin levels and lower anxiety-like behavior after weaning, while worsening their adolescent offspring cognitive behavior. Whereas MS in Wistar dams elicited higher quality of pup-directed behavior, increasing brain-derived neurotrophic factor (BDNF) in the offspring, which seems to have prevented a negative impact on cognition. Hypothalamic oxytocin seems to affect the salience of the social environment cues (negatively for Kyoto) leading to different coping strategies. Our findings highlight the importance of contextual and individual factors in the understanding of the oxytocin role in modulating maternal behavior and stress regulatory processes.
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Jhan KY, Cheng CJ, Chou CJ, Jung SM, Lai GJ, Chen KY, Wang LC. Improvements of cognitive functions in mice heavily infected by Angiostrongylus cantonensis after treatment with albendazole, dexamethasone, or co-therapy. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2022; 55:935-945. [PMID: 35484079 DOI: 10.1016/j.jmii.2022.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 02/25/2022] [Accepted: 04/01/2022] [Indexed: 06/14/2023]
Abstract
Angiostrongylus cantonensis, the causative agent of human eosinophilic meningitis and eosinophilic meningoencepalitis, has been reported to cause cognitive impairments in the host. To determine whether drug treatment improves the cognitive functions, BALB/c mice infected with 50 third-stage larvae were treated with albendazole, dexamethasone, or co-therapy since day 7 or 14 post-infection for one or two weeks. Abilities of spatial memory and learning of these animals were assessed with the Morris water maze. Our results showed that body weight was significant higher then infected group in the albendazole and combined therapy groups. Significantly lower worm recovery rates were found in mice treated with the same groups. The mice treated with dexamethasone since day 7 for 14 day had significant longer time in the remaining groups were found in forced swimming test. The animals treated with albendazole and combined therapy since day 7 for 14 days was demonstrated to have significantly shorter latencies to the platform in learning memory on day 3 and 4. Mice in these two groups were demonstrated to have significantly higher sores in spatial memory tests. These results indicate that treatment with albendazole or combined therapy may be more efficient in preventing brain damages and depression as well as preserving their capabilities in learning and memory. Therefore, administration of albendazole alone or combined with dexamethasone should have higher efficacies than dexamethasone alone in treatment of BALB/c mice infected with a heavy dose of 50 third-stage larvae of A. cantonensis.
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Affiliation(s)
- Kai-Yuan Jhan
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Chien-Ju Cheng
- Department of Parasitology, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Chih-Jen Chou
- Department of Parasitology, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Shih-Ming Jung
- Department of Pathology, Chang-Gung Memorial Hospital, Chang-Gung Children Hospital at Linkou and Chang-Gung University, Taoyuan 333, Taiwan
| | - Guan-Jhih Lai
- Department of Parasitology, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Kuang-Yao Chen
- Department of Parasitology, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
| | - Lian-Chen Wang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; Department of Parasitology, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
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12
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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.
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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
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13
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Chen P, Chen F, Wu Y, Zhou B. New Insights Into the Role of Aberrant Hippocampal Neurogenesis in Epilepsy. Front Neurol 2022; 12:727065. [PMID: 34975709 PMCID: PMC8714646 DOI: 10.3389/fneur.2021.727065] [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: 06/23/2021] [Accepted: 11/02/2021] [Indexed: 12/31/2022] Open
Abstract
Data accumulated over the past four decades have confirmed that adult hippocampal neurogenesis (HN) plays a key role in the wide spectrum of hippocampal pathology. Epilepsy is a disorder of the central nervous system characterized by spontaneous recurrent seizures. Although neurogenesis in persistent germinative zones is altered in the adult rodent models of epilepsy, the effects of seizure-induced neurogenesis in the epileptic brain, in terms of either a pathological or reparative role, are only beginning to be explored. In this review, we described the most recent advances in neurogenesis in epilepsy and outlooked future directions for neural stem cells (NSCs) and epilepsy-in-a-dish models. We proposed that it may help in refining the underlying molecular mechanisms of epilepsy and improving the therapies and precision medicine for patients with epilepsy.
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Affiliation(s)
- Peng Chen
- Department of Pharmacy, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan, China
| | - Fuchao Chen
- Sinopharm Dongfeng General Hospital, Hubei University of Medicine, Shiyan, China
| | - Yue Wu
- Department of Pharmacy, Renmin Hospital of Wuhan University, Wuhan, China
| | - Benhong Zhou
- Department of Pharmacy, Renmin Hospital of Wuhan University, Wuhan, China
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14
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Converging purinergic and immune signaling pathways drive IL-6 secretion by Fragile X cortical astrocytes via STAT3. J Neuroimmunol 2021; 361:577745. [PMID: 34695768 DOI: 10.1016/j.jneuroim.2021.577745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 09/10/2021] [Accepted: 10/06/2021] [Indexed: 11/21/2022]
Abstract
The symptoms of Fragile X syndrome (FXS) are driven in part by abnormal glial-mediated function. FXS astrocytes release elevated levels of immune-related factors interleukin-6 (IL-6) and tenascin C (TNC), and also demonstrate increased purinergic signaling, a pathway linked to signaling factor release. Here, in cortical astrocytes from the Fmr1 knockout (KO) FXS mouse model, purinergic agonism enhanced TNC secretion and STAT3 phosphorylation, two processes linked to elevated IL-6 secretion in FXS, while STAT3 knockdown and TLR4 antagonism normalized Fmr1 KO IL-6 release. We therefore suggest that purinergic signaling and immune regulatory pathways converge to drive FXS cortical pro-inflammatory responses.
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15
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Bobbo VC, Engel DF, Jara CP, Mendes NF, Haddad-Tovolli R, Prado TP, Sidarta-Oliveira D, Morari J, Velloso LA, Araujo EP. Interleukin-6 actions in the hypothalamus protects against obesity and is involved in the regulation of neurogenesis. J Neuroinflammation 2021; 18:192. [PMID: 34465367 PMCID: PMC8408946 DOI: 10.1186/s12974-021-02242-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 08/18/2021] [Indexed: 01/21/2023] Open
Abstract
Background Interleukin-6 (IL6) produced in the context of exercise acts in the hypothalamus reducing obesity-associated inflammation and restoring the control of food intake and energy expenditure. In the hippocampus, some of the beneficial actions of IL6 are attributed to its neurogenesis-inducing properties. However, in the hypothalamus, the putative neurogenic actions of IL6 have never been explored, and its potential to balance energy intake can be an approach to prevent or attenuate obesity. Methods Wild-type (WT) and IL6 knockout (KO) mice were employed to study the capacity of IL6 to induce neurogenesis. We used cell labeling with Bromodeoxyuridine (BrdU), immunofluorescence, and real-time PCR to determine the expression of markers of neurogenesis and neurotransmitters. We prepared hypothalamic neuroprogenitor cells from KO that were treated with IL6 in order to provide an ex vivo model to further characterizing the neurogenic actions of IL6 through differentiation assays. In addition, we analyzed single-cell RNA sequencing data and determined the expression of IL6 and IL6 receptor in specific cell types of the murine hypothalamus. Results IL6 expression in the hypothalamus is low and restricted to microglia and tanycytes, whereas IL6 receptor is expressed in microglia, ependymocytes, endothelial cells, and astrocytes. Exogenous IL6 reduces diet-induced obesity. In outbred mice, obesity-resistance is accompanied by increased expression of IL6 in the hypothalamus. IL6 induces neurogenesis-related gene expression in the hypothalamus and in neuroprogenitor cells, both from WT as well as from KO mice. Conclusion IL6 induces neurogenesis-related gene expression in the hypothalamus of WT mice. In KO mice, the neurogenic actions of IL6 are preserved; however, the appearance of new fully differentiated proopiomelanocortin (POMC) and neuropeptide Y (NPY) neurons is either delayed or disturbed. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02242-8.
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Affiliation(s)
- Vanessa C Bobbo
- Nursing School, University of Campinas, Campinas, Brazil.,Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Daiane F Engel
- Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Carlos Poblete Jara
- Nursing School, University of Campinas, Campinas, Brazil.,Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Natalia F Mendes
- Nursing School, University of Campinas, Campinas, Brazil.,Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Roberta Haddad-Tovolli
- Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Thais P Prado
- Nursing School, University of Campinas, Campinas, Brazil.,Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Davi Sidarta-Oliveira
- Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Joseane Morari
- Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Licio A Velloso
- Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil
| | - Eliana P Araujo
- Nursing School, University of Campinas, Campinas, Brazil. .,Laboratory of Cell Signaling, University of Campinas, Rua Cinco de Junho, 350, Cidade Universitária, Campinas, SP, 13083-877, Brazil.
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16
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Poletti S, Mazza MG, Calesella F, Vai B, Lorenzi C, Manfredi E, Colombo C, Zanardi R, Benedetti F. Circulating inflammatory markers impact cognitive functions in bipolar depression. J Psychiatr Res 2021; 140:110-116. [PMID: 34107379 DOI: 10.1016/j.jpsychires.2021.05.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 05/05/2021] [Accepted: 05/29/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Cognitive impairment is a core feature of bipolar disorder, with a prevalence of about 64.4% during episodes and 57.1% in euthymia. Recent evidences suggest that cognitive deficits in BD may follow immune dysfunction and elevated levels of inflammatory cytokines have been reported during periods of depression, mania and euthymia, suggesting the presence of a chronic, low-grade inflammatory state. The aim of the study is to investigate if immune/inflammatory markers and especially chemokines associate to cognitive performances. METHODS Seventy-six consecutively admitted inpatients with a depressive episode in course of bipolar disorder performed a neuropsychological evaluation with the Brief Assessment of Cognition in Schizophrenia and plasma blood levels of cytokines, chemokines and growth factors were analyzed with Luminex technology. RESULTS Higher levels of IL-1β, IL-6, CCL2, CCL4, CCL5, CXCL10, and bFGF are associated with the likelihood of having a poor cognitive performance. LIMITATIONS Limitation include the lack of a group of healthy controls and the lack of information regarding previous psychopharmacological treatments, alcohol and tobacco use. CONCLUSIONS Our results confirm the importance of chemokines in bipolar disorder and suggest that inflammatory markers suggestive of a low-grade inflammatory state could contribute to the neurocognitive deficits observed in depressed patients.
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Affiliation(s)
- Sara Poletti
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy; University Vita-Salute San Raffaele, Milano, Italy.
| | - Mario Gennaio Mazza
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy; University Vita-Salute San Raffaele, Milano, Italy
| | - Federico Calesella
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy; University Vita-Salute San Raffaele, Milano, Italy
| | - Benedetta Vai
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy; University Vita-Salute San Raffaele, Milano, Italy
| | - Cristina Lorenzi
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy
| | - Elena Manfredi
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy; University Vita-Salute San Raffaele, Milano, Italy
| | - Cristina Colombo
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy; University Vita-Salute San Raffaele, Milano, Italy
| | - Raffaella Zanardi
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy
| | - Francesco Benedetti
- Division of Neuroscience, Scientific Institute Ospedale San Raffaele, Milano, Italy; University Vita-Salute San Raffaele, Milano, Italy
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17
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Zhu G, Zhao J, Zhang H, Chen W, Wang G. Administration of Bifidobacterium breve Improves the Brain Function of Aβ 1-42-Treated Mice via the Modulation of the Gut Microbiome. Nutrients 2021; 13:1602. [PMID: 34064762 PMCID: PMC8150793 DOI: 10.3390/nu13051602] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 05/06/2021] [Accepted: 05/08/2021] [Indexed: 01/10/2023] Open
Abstract
Psychobiotics are used to treat neurological disorders, including mild cognitive impairment (MCI) and Alzheimer's disease (AD). However, the mechanisms underlying their neuroprotective effects remain unclear. Herein, we report that the administration of bifidobacteria in an AD mouse model improved behavioral abnormalities and modulated gut dysbiosis. Bifidobacterium breve CCFM1025 and WX treatment significantly improved synaptic plasticity and increased the concentrations of brain-derived neurotrophic factor (BDNF), fibronectin type III domain-containing protein 5 (FNDC5), and postsynaptic density protein 95 (PSD-95). Furthermore, the microbiome and metabolomic profiles of mice indicate that specific bacterial taxa and their metabolites correlate with AD-associated behaviors, suggesting that the gut-brain axis contributes to the pathophysiology of AD. Overall, these findings reveal that B. breve CCFM1025 and WX have beneficial effects on cognition via the modulation of the gut microbiome, and thus represent a novel probiotic dietary intervention for delaying the progression of AD.
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Affiliation(s)
- Guangsu Zhu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (G.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (G.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- International Joint Research Center for Probiotics and Gut Health, Jiangnan University, Wuxi 214122, China
- (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou 225004, China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (G.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou 225004, China
- National Engineering Center of Functional Food, Jiangnan University, Wuxi 214122, China
- Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch, Wuxi 214122, China
| | - Wei Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (G.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Center of Functional Food, Jiangnan University, Wuxi 214122, China
| | - Gang Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (G.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- International Joint Research Center for Probiotics and Gut Health, Jiangnan University, Wuxi 214122, China
- (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou 225004, China
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18
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Carpita B, Marazziti D, Palego L, Giannaccini G, Betti L, Dell'Osso L. Microbiota, Immune System and Autism Spectrum Disorders: An Integrative Model towards Novel Treatment Options. Curr Med Chem 2020; 27:5119-5136. [PMID: 31448708 DOI: 10.2174/0929867326666190328151539] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Autism Spectrum Disorder (ASD) is a condition strongly associated with genetic predisposition and familial aggregation. Among ASD patients, different levels of symptoms severity are detectable, while the presence of intermediate autism phenotypes in close relatives of ASD probands is also known in literature. Recently, increasing attention has been paid to environmental factors that might play a role in modulating the relationship between genomic risk and development and severity of ASD. Within this framework, an increasing body of evidence has stressed a possible role of both gut microbiota and inflammation in the pathophysiology of neurodevelopment. The aim of this paper is to review findings about the link between microbiota dysbiosis, inflammation and ASD. METHODS Articles ranging from 1990 to 2018 were identified on PUBMED and Google Scholar databases, with keyword combinations as: microbiota, immune system, inflammation, ASD, autism, broad autism phenotype, adult. RESULTS Recent evidence suggests that microbiota alterations, immune system and neurodevelopment may be deeply intertwined, shaping each other during early life. However, results from both animal models and human samples are still heterogeneous, while few studies focused on adult patients and ASD intermediate phenotypes. CONCLUSION A better understanding of these pathways, within an integrative framework between central and peripheral systems, might not only shed more light on neural basis of ASD symptoms, clarifying brain pathophysiology, but it may also allow to develop new therapeutic strategies for these disorders, still poorly responsive to available treatments.
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Affiliation(s)
- Barbara Carpita
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Donatella Marazziti
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Lionella Palego
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Gino Giannaccini
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Laura Betti
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
| | - Liliana Dell'Osso
- Department of Clinical and Experimental Medicine, Section of Psychiatry, University of Pisa, Via Roma, 6756100 Pisa, Italy
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19
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Araki T, Ikegaya Y, Koyama R. The effects of microglia‐ and astrocyte‐derived factors on neurogenesis in health and disease. Eur J Neurosci 2020; 54:5880-5901. [PMID: 32920880 PMCID: PMC8451940 DOI: 10.1111/ejn.14969] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 12/20/2022]
Abstract
Hippocampal neurogenesis continues throughout life and has been suggested to play an essential role in maintaining spatial cognitive function under physiological conditions. An increasing amount of evidence has indicated that adult neurogenesis is tightly controlled by environmental conditions in the neurogenic niche, which consists of multiple types of cells including microglia and astrocytes. Microglia maintain the environment of neurogenic niche through their phagocytic capacity and interaction with neurons via fractalkine‐CX3CR1 signaling. In addition, microglia release growth factors such as brain‐derived neurotrophic factor (BDNF) and cytokines such as tumor necrosis factor (TNF)‐α to support the development of adult born neurons. Astrocytes also manipulate neurogenesis by releasing various soluble factors including adenosine triphosphate and lactate. Whereas, under pathological conditions such as Alzheimer's disease, depression, and epilepsy, microglia and astrocytes play a leading role in inflammation and are involved in attenuating the normal process of neurogenesis. The modulation of glial functions on neurogenesis in these brain diseases are attracting attention as a new therapeutic target. This review describes how these glial cells play a role in adult hippocampal neurogenesis in both health and disease, especially focusing glia‐derived factors.
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Affiliation(s)
- Tasuku Araki
- Laboratory of Chemical Pharmacology Graduate School of Pharmaceutical Sciences The University of Tokyo Tokyo Japan
| | - Yuji Ikegaya
- Laboratory of Chemical Pharmacology Graduate School of Pharmaceutical Sciences The University of Tokyo Tokyo Japan
- Center for Information and Neural Networks Suita City Osaka Japan
| | - Ryuta Koyama
- Laboratory of Chemical Pharmacology Graduate School of Pharmaceutical Sciences The University of Tokyo Tokyo Japan
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20
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Interleukin-6: A neuro-active cytokine contributing to cognitive impairment in Duchenne muscular dystrophy? Cytokine 2020; 133:155134. [DOI: 10.1016/j.cyto.2020.155134] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/13/2020] [Accepted: 05/14/2020] [Indexed: 12/24/2022]
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21
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Gruol DL, Hernandez RV, Roberts A. Alcohol Enhances Responses to High Frequency Stimulation in Hippocampus from Transgenic Mice with Increased Astrocyte Expression of IL-6. Cell Mol Neurobiol 2020; 41:1299-1310. [PMID: 32562098 DOI: 10.1007/s10571-020-00902-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 06/09/2020] [Indexed: 12/29/2022]
Abstract
Recent studies show that alcohol exposure can induce glial production of neuroimmune factors in the CNS. Of these, IL-6 has gained attention because it is involved in a number of important physiological and pathophysiological processes that could be affected by alcohol-induced CNS production of IL-6, particularly under conditions of excessive alcohol use. For example, IL-6 has been shown to play a role in hippocampal behaviors and synaptic plasticity (long-term potentiation; LTP) associated with memory and learning. Surprisingly, in our in vitro studies of LTP at the Schaffer collateral to CA1 pyramidal neuron synapse in hippocampus from transgenic mice that express elevated levels of astrocyte produced IL-6 (TG), LTP was not altered by the increased levels of IL-6. However, exposure to acute alcohol revealed neuroadaptive changes that served to protect LTP against the alcohol-induced reduction of LTP observed in hippocampus from non-transgenic control mice (WT). Here we examined the induction phase of LTP to assess if presynaptic neuroadaptive changes occurred in the hippocampus of TG mice that contributed to the resistance of LTP to alcohol. Results are consistent with a role for IL-6-induced neuroadaptive effects on presynaptic mechanisms involved in transmitter release in the resistance of LTP to alcohol in hippocampus from the TG mice. These actions are important with respect to a role for IL-6 in physiological and pathophysiological processes in the CNS and in CNS actions of alcohol, especially when excessive alcohol used is comorbid with conditions associated with elevated levels of IL-6 in the CNS.
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Affiliation(s)
- Donna L Gruol
- Neuroscience Department, SR301, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.
| | - Ruben V Hernandez
- Neuroscience Department, SR301, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Amanda Roberts
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA, 92037, USA
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22
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Corder KM, Li Q, Cortes MA, Bartley AF, Davis TR, Dobrunz LE. Overexpression of neuropeptide Y decreases responsiveness to neuropeptide Y. Neuropeptides 2020; 79:101979. [PMID: 31708112 PMCID: PMC6960342 DOI: 10.1016/j.npep.2019.101979] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 10/10/2019] [Accepted: 10/10/2019] [Indexed: 12/14/2022]
Abstract
Neuropeptide Y (NPY) is an endogenous neuropeptide that is abundantly expressed in the central nervous system. NPY is involved in various neurological processes and neuropsychiatric disorders, including fear learning and anxiety disorders. Reduced levels of NPY are reported in Post-Traumatic Stress Disorder (PTSD) patients, and NPY has been proposed as a potential therapeutic target for PTSD. It is therefore important to understand the effects of chronic enhancement of NPY on anxiety and fear learning. Previous studies have shown that acute elevation of NPY reduces anxiety, fear learning and locomotor activity. Models of chronic NPY overexpression have produced mixed results, possibly caused by ectopic NPY expression. NPY is expressed primarily by a subset of GABAergic interneurons, providing specific spatiotemporal release patterns. Administration of exogenous NPY throughout the brain, or overexpression in cells that do not normally release NPY, can have detrimental side effects, including memory impairment. In order to determine the effects of boosting NPY only in the cells that normally release it, we utilized a transgenic mouse line that overexpresses NPY only in NPY+ cells. We tested for effects on anxiety related behaviors in adolescent mice, an age with high incidence of anxiety disorders in humans. Surprisingly, we did not observe the expected reduction in anxiety-like behavior in NPY overexpression mice. There was no change in fear learning behavior, although there was a deficit in nest building. The effect of exogenous NPY on synaptic transmission in acute hippocampal slices was also diminished, indicating that the function of NPY receptors is impaired. Reduced NPY receptor function could contribute to the unexpected behavioral outcomes. We conclude that overexpression of NPY, even in cells that normally express it, can lead to reduced responsiveness of NPY receptors, potentially affecting the ability of NPY to function as a long-term therapeutic.
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Affiliation(s)
- Katelynn M Corder
- University of Alabama at Birmingham, Department of Neurobiology, 1825 University Blvd, SHEL 971, Birmingham, AL 35294, United States of America; University of Alabama at Birmingham, Department of Biology, 1670 University Blvd., VH G133B, Birmingham, AL 35233, United States of America
| | - Qin Li
- University of Alabama at Birmingham, Department of Neurobiology, 1825 University Blvd, SHEL 971, Birmingham, AL 35294, United States of America
| | - Mariana A Cortes
- University of Alabama at Birmingham, Department of Neurobiology, 1825 University Blvd, SHEL 971, Birmingham, AL 35294, United States of America
| | - Aundrea F Bartley
- University of Alabama at Birmingham, Department of Neurobiology, 1825 University Blvd, SHEL 971, Birmingham, AL 35294, United States of America
| | - Taylor R Davis
- University of Alabama at Birmingham, Department of Neurobiology, 1825 University Blvd, SHEL 971, Birmingham, AL 35294, United States of America
| | - Lynn E Dobrunz
- University of Alabama at Birmingham, Department of Neurobiology, 1825 University Blvd, SHEL 971, Birmingham, AL 35294, United States of America.
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23
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Shivakumar V, Sreeraj VS, Subbanna M, Kalmady SV, Amaresha AC, Narayanaswamy JC, Debnath M, Venkatasubramanian G. Differential impact of interleukin-6 promoter gene polymorphism on hippocampal volume in antipsychotic-naïve schizophrenia patients. Indian J Psychiatry 2020; 62:36-42. [PMID: 32001929 PMCID: PMC6964441 DOI: 10.4103/psychiatry.indianjpsychiatry_486_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 10/02/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Differential susceptibility model hypothesizes that a genotype need not be unfavorable all the time as postulated in stress-diathesis model but can be beneficial in a supportive context. Single-nucleotide polymorphism (SNP) (rs18000795) within the promoter region of interleukin-6 (IL-6) gene was earlier noted to have a differential susceptibility on hippocampal volume in schizophrenia (SCZ). MATERIALS AND METHODS We examined antipsychotic-naïve/free SCZ patients (n = 35) in comparison with healthy controls (n = 68). Hippocampus volumes were assessed in 3 Tesla magnetic resonance imaging using voxel-based morphometry. Region of interest analysis was done using hippocampus mask. IL-6 SNP (rs1800795) was genotyped using TaqMan allelic discrimination assay. RESULTS A significantly deficient right (T = 3.03; K E= 392; P SVC-FWE= 0.04) and left (T = 3.03; K E= 47; P uncorr= 0.03) hippocampal gray matter volumes were noted in SCZ patients after controlling for the potential confounding effects of age, sex, and total brain volume. There was a significant diagnosis x rs1800795 genotype interaction involving both left (T = 2.17, K E= 95, P uncorr= 0.02) and right (T = 1.82, K E= 29, P uncorr= 0.04) hippocampal volumes. Patients with GG (left: F =5.78; P = 0.02; right: F =6.21; P = 0.01) but not GC/CC genotype (left: F =0.89; P = 0.34; right: F <0.01; P = 0.95) had volume depletion. CONCLUSION A paradoxical smaller hippocampal volume with GG genotype was noted in SCZ. Further elucidation of its mechanistic basis might have translational implications.
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Affiliation(s)
- Venkataram Shivakumar
- Translational Psychiatry Lab, Neurobiology Research Center, Bengaluru, Karnataka, India.,InSTAR Program, Schizophrenia Clinic, Department of Psychiatry, Bengaluru, Karnataka, India
| | - Vanteemar S Sreeraj
- Translational Psychiatry Lab, Neurobiology Research Center, Bengaluru, Karnataka, India.,InSTAR Program, Schizophrenia Clinic, Department of Psychiatry, Bengaluru, Karnataka, India
| | - Manjula Subbanna
- InSTAR Program, Schizophrenia Clinic, Department of Psychiatry, Bengaluru, Karnataka, India.,Department of Human Genetics, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Sunil V Kalmady
- Translational Psychiatry Lab, Neurobiology Research Center, Bengaluru, Karnataka, India.,InSTAR Program, Schizophrenia Clinic, Department of Psychiatry, Bengaluru, Karnataka, India
| | - Anekal C Amaresha
- Translational Psychiatry Lab, Neurobiology Research Center, Bengaluru, Karnataka, India.,InSTAR Program, Schizophrenia Clinic, Department of Psychiatry, Bengaluru, Karnataka, India
| | - Janardhanan C Narayanaswamy
- Translational Psychiatry Lab, Neurobiology Research Center, Bengaluru, Karnataka, India.,InSTAR Program, Schizophrenia Clinic, Department of Psychiatry, Bengaluru, Karnataka, India
| | - Monojit Debnath
- InSTAR Program, Schizophrenia Clinic, Department of Psychiatry, Bengaluru, Karnataka, India.,Department of Human Genetics, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Ganesan Venkatasubramanian
- Translational Psychiatry Lab, Neurobiology Research Center, Bengaluru, Karnataka, India.,InSTAR Program, Schizophrenia Clinic, Department of Psychiatry, Bengaluru, Karnataka, India
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24
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Gamma Visual Stimulation Induces a Neuroimmune Signaling Profile Distinct from Acute Neuroinflammation. J Neurosci 2019; 40:1211-1225. [PMID: 31871276 PMCID: PMC7002142 DOI: 10.1523/jneurosci.1511-19.2019] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 11/27/2019] [Accepted: 12/02/2019] [Indexed: 12/15/2022] Open
Abstract
Many neurodegenerative and neurological diseases are rooted in dysfunction of the neuroimmune system; therefore, manipulating this system has strong therapeutic potential. Prior work has shown that exposing mice to flickering lights at 40 Hz drives gamma frequency (∼40 Hz) neural activity and recruits microglia, the primary immune cells of the brain, revealing a novel method to manipulate the neuroimmune system. Many neurodegenerative and neurological diseases are rooted in dysfunction of the neuroimmune system; therefore, manipulating this system has strong therapeutic potential. Prior work has shown that exposing mice to flickering lights at 40 Hz drives gamma frequency (∼40 Hz) neural activity and recruits microglia, the primary immune cells of the brain, revealing a novel method to manipulate the neuroimmune system. However, the biochemical signaling mechanisms between 40 Hz neural activity and immune recruitment remain unknown. Here, we exposed wild-type male mice to 5–60 min of 40 Hz or control flicker and assessed cytokine and phosphoprotein networks known to play a role in immune function. We found that 40 Hz flicker leads to increases in the expression of cytokines which promote microglial phagocytic states, such as IL-6 and IL-4, and increased expression of microglial chemokines, such as macrophage-colony-stimulating factor and monokine induced by interferon-γ. Interestingly, cytokine effects differed as a function of stimulation frequency, revealing a range of neuroimmune effects of stimulation. To identify possible mechanisms underlying cytokine expression, we quantified the effect of the flicker on intracellular signaling pathways known to regulate cytokine levels. We found that a 40 Hz flicker upregulates phospho-signaling within the nuclear factor κ-light-chain-enhancer of activated B cells (NF-κB) and mitogen-activated protein kinase (MAPK) pathways. While cytokine expression increased after 1 h of 40 Hz flicker stimulation, protein phosphorylation in the NF-κB pathway was upregulated within minutes. Importantly, the cytokine expression profile induced by 40 Hz flicker was different from cytokine changes in response to acute neuroinflammation induced by lipopolysaccharides. These results are the first, to our knowledge, to show how visual stimulation rapidly induces critical neuroimmune signaling in healthy animals. SIGNIFICANCE STATEMENT Prior work has shown that exposing mice to lights flickering at 40 Hz induces neural spiking activity at 40 Hz (within the gamma frequency) and recruits microglia, the primary immune cells of the brain. However, the immediate effect of 40 Hz flicker on neuroimmune biochemical signaling was unknown. We found that 40 Hz flicker leads to significant increases in the expression of cytokines, key immune signals known to recruit microglia. Furthermore, we found that 40 Hz flicker rapidly changes the phosphorylation of proteins in the NF-κB and MAPK pathways, both known to regulate cytokine expression. Our findings are the first to delineate a specific rapid immune signaling response following 40 Hz visual stimulation, highlighting both the unique nature and therapeutic potential of this treatment.
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25
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Sanchis P, Fernández‐Gayol O, Vizueta J, Comes G, Canal C, Escrig A, Molinero A, Giralt M, Hidalgo J. Microglial cell‐derived interleukin‐6 influences behavior and inflammatory response in the brain following traumatic brain injury. Glia 2019; 68:999-1016. [DOI: 10.1002/glia.23758] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 11/18/2019] [Accepted: 11/20/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Paula Sanchis
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of BiosciencesUniversitat Autònoma de Barcelona Barcelona Spain
| | - Olaya Fernández‐Gayol
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of BiosciencesUniversitat Autònoma de Barcelona Barcelona Spain
| | - Joel Vizueta
- Departament de Genètica, Microbiologia i Estadística and Institut de Recerca de la Biodiversitat (IRBio), Facultat de BiologiaUniversitat de Barcelona Barcelona Spain
| | - Gemma Comes
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of BiosciencesUniversitat Autònoma de Barcelona Barcelona Spain
| | - Carla Canal
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of BiosciencesUniversitat Autònoma de Barcelona Barcelona Spain
| | - Anna Escrig
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of BiosciencesUniversitat Autònoma de Barcelona Barcelona Spain
| | - Amalia Molinero
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of BiosciencesUniversitat Autònoma de Barcelona Barcelona Spain
| | - Mercedes Giralt
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of BiosciencesUniversitat Autònoma de Barcelona Barcelona Spain
| | - Juan Hidalgo
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of BiosciencesUniversitat Autònoma de Barcelona Barcelona Spain
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26
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Escrig A, Canal C, Sanchis P, Fernández-Gayol O, Montilla A, Comes G, Molinero A, Giralt M, Giménez-Llort L, Becker-Pauly C, Rose-John S, Hidalgo J. IL-6 trans-signaling in the brain influences the behavioral and physio-pathological phenotype of the Tg2576 and 3xTgAD mouse models of Alzheimer's disease. Brain Behav Immun 2019; 82:145-159. [PMID: 31401302 DOI: 10.1016/j.bbi.2019.08.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 07/09/2019] [Accepted: 08/07/2019] [Indexed: 12/22/2022] Open
Abstract
Alzheimer's disease (AD) is the most commonly diagnosed dementia but its underlying pathological mechanisms still unclear. Neuroinflammation and secretion of cytokines such as interleukin-6 (IL-6) accompany the main hallmarks of the disease: amyloid plaques and neurofibrillary tangles. In this study, we analyzed the role of IL-6 trans-signaling in two mouse models of AD, Tg2576 and 3xTg-AD mice. The inhibition of IL-6 trans-signaling partially rescued the AD-induced mortality in females of both models. Before amyloid plaques deposition, it reversed AD-induced changes in exploration and anxiety (but did not affect locomotion) in Tg2576 female mice. However, after plaque deposition the only behavioral trait affected by the inhibition of IL-6 trans-signaling was locomotion. Results in the Morris water maze suggest that cognitive flexibility was reduced by the blocking of the IL-6 trans-signaling in young and old Tg2576 female mice. The inhibition of IL-6 trans-signaling also decreased amyloid plaque burden in cortex and hippocampus, and Aβ40 and Aβ42 levels in the cortex, of Tg2576 female mice. The aforementioned changes might be correlated with changes in blood vessels and matrix structure and organization rather than changes in neuroinflammation. 3xTgAD mice showed a very mild phenotype regarding amyloid cascade, but results were in accordance with those of Tg2576 mice. These results strongly suggest that the inhibition of the IL-6 trans-signaling could represent a powerful therapeutic target in AD.
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Affiliation(s)
- Anna Escrig
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain
| | - Carla Canal
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain
| | - Paula Sanchis
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain
| | - Olaya Fernández-Gayol
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain
| | - Alejandro Montilla
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain
| | - Gemma Comes
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain
| | - Amalia Molinero
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain
| | - Mercedes Giralt
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain
| | - Lydia Giménez-Llort
- Institute of Neurosciences and Department of Psychiatry and Forensic Medicine, Faculty of Medicine, Universitat Autònoma de Barcelona, 08193, Spain
| | - Christoph Becker-Pauly
- Department of Biochemistry, Medical Faculty, Christian-Albrechts-Universität zu Kiel, 24098, Germany
| | - Stefan Rose-John
- Department of Biochemistry, Medical Faculty, Christian-Albrechts-Universität zu Kiel, 24098, Germany
| | - Juan Hidalgo
- Institute of Neurosciences and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193, Spain.
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27
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Roberts AJ, Khom S, Bajo M, Vlkolinsky R, Polis I, Cates-Gatto C, Roberto M, Gruol DL. Increased IL-6 expression in astrocytes is associated with emotionality, alterations in central amygdala GABAergic transmission, and excitability during alcohol withdrawal. Brain Behav Immun 2019; 82:188-202. [PMID: 31437534 PMCID: PMC6800653 DOI: 10.1016/j.bbi.2019.08.185] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 08/16/2019] [Accepted: 08/17/2019] [Indexed: 01/14/2023] Open
Abstract
Accumulating evidence from preclinical and clinical studies has implicated a role for the cytokine IL-6 in a variety of CNS diseases including anxiety-like and depressive-like behaviors, as well as alcohol use disorder. Here we use homozygous and heterozygous transgenic mice expressing elevated levels of IL-6 in the CNS due to increased astrocyte expression and non-transgenic littermates to examine a role for astrocyte-produced IL-6 in emotionality (response to novelty, anxiety-like, and depressive-like behaviors). Our results from homozygous IL-6 mice in a variety of behavioral tests (light/dark transfer, open field, digging, tail suspension, and forced swim tests) support a role for IL-6 in stress-coping behaviors. Ex vivo electrophysiological studies of neuronal excitability and inhibitory GABAergic synaptic transmission in the central nucleus of the amygdala (CeA) of the homozygous transgenic mice revealed increased inhibitory GABAergic signaling and increased excitability of CeA neurons, suggesting a role for astrocyte produced IL-6 in the amygdala in exploratory drive and depressive-like behavior. Furthermore, studies in the hippocampus of activation/expression of proteins associated with IL-6 signal transduction and inhibitory GABAergic mechanisms support a role for astrocyte produced IL-6 in depressive-like behaviors. Our studies indicate a complex and dose-dependent relationship between IL-6 and behavior and implicate IL-6 induced neuroadaptive changes in neuronal excitability and the inhibitory GABAergic system as important contributors to altered behavior associated with IL-6 expression in the CNS.
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Affiliation(s)
- Amanda J. Roberts
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA 92037 U.S.A
| | - Sophia Khom
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037 U.S.A
| | - Michal Bajo
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037 U.S.A
| | - Roman Vlkolinsky
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037 U.S.A
| | - Ilham Polis
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA 92037 U.S.A
| | - Chelsea Cates-Gatto
- Animal Models Core Facility, The Scripps Research Institute, La Jolla, CA 92037 U.S.A
| | - Marisa Roberto
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037 U.S.A
| | - Donna L. Gruol
- Neuroscience Department, The Scripps Research Institute, La Jolla, CA 92037 U.S.A,Corresponding Author: Dr. Donna L. Gruol, Neuroscience Department, SP30-1522, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, Phone: (858) 784-7060, Fax: (858) 784-7393,
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28
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Bialuk I, Jakubów P, Winnicka MM. Significance of IL-6 Deficiency in Recognition Memory in Young Adult and Aged Mice. Behav Genet 2019; 49:415-423. [PMID: 31129771 PMCID: PMC6554246 DOI: 10.1007/s10519-019-09959-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 05/13/2019] [Indexed: 02/06/2023]
Abstract
Chronic peripheral elevation of interleukin 6 (IL-6) in humans is associated with cognitive deficits. 4- and 24-month-old IL-6-deficient C57BL/6J (IL-6KO) and reference wild-type (WT) mice were tested in an object recognition test. Discrimination ratios and recognition indexes were significantly lower in 4-month-old IL-6KO and in 24-month-old WT mice vs 4-month-old WT animals. Their discrimination ratios had negative values and recognition indexes were below 50% indicating inability to differentiate the novel from the familiar object after 1-hour delay. In 24-month-old IL-6KO mice recognition index reached 53.17% indicating that their recognition memory was not worsened with age in comparison with younger IL-6-deficient animals. Results of holeboard and elevated plus maze indicated that this effect was memory specific. Inborn IL-6 deficiency attenuated recognition memory in 4-month-old mice and did not altered recognition memory in aged animals. IL-6 signalling may constitute a target for development of the protection against memory disturbances connected with IL-6 overexpression.
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Affiliation(s)
- Izabela Bialuk
- Department of General and Experimental Pathology, Medical University of Białystok, Mickiewicza 2c, 15-222, Białystok, Poland.
| | - Piotr Jakubów
- Department of General and Experimental Pathology, Medical University of Białystok, Mickiewicza 2c, 15-222, Białystok, Poland
| | - Maria Małgorzata Winnicka
- Department of General and Experimental Pathology, Medical University of Białystok, Mickiewicza 2c, 15-222, Białystok, Poland
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29
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Nataf S, Uriagereka J, Benitez-Burraco A. The Promoter Regions of Intellectual Disability-Associated Genes Are Uniquely Enriched in LTR Sequences of the MER41 Primate-Specific Endogenous Retrovirus: An Evolutionary Connection Between Immunity and Cognition. Front Genet 2019; 10:321. [PMID: 31031802 PMCID: PMC6473030 DOI: 10.3389/fgene.2019.00321] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 03/22/2019] [Indexed: 12/14/2022] Open
Abstract
Social behavior and neuronal connectivity in rodents have been shown to be shaped by the prototypical T lymphocyte-derived pro-inflammatory cytokine Interferon-gamma (IFNγ). It has also been demonstrated that STAT1 (Signal Transducer And Activator Of Transcription 1), a transcription factor (TF) crucially involved in the IFNγ pathway, binds consensus sequences that, in humans, are located with a high frequency in the LTRs (Long Terminal Repeats) of the MER41 family of primate-specific HERVs (Human Endogenous Retroviruses). However, the putative role of an IFNγ/STAT1/MER41 pathway in human cognition and/or behavior is still poorly documented. Here, we present evidence that the promoter regions of intellectual disability-associated genes are uniquely enriched in LTR sequences of the MER41 HERVs. This observation is specific to MER41 among more than 130 HERVs examined. Moreover, we have not found such a significant enrichment in the promoter regions of genes that associate with autism spectrum disorder (ASD) or schizophrenia. Interestingly, ID-associated genes exhibit promoter-localized MER41 LTRs that harbor TF binding sites (TFBSs) for not only STAT1 but also other immune TFs such as, in particular, NFKB1 (Nuclear Factor Kappa B Subunit 1) and STAT3 (Signal Transducer And Activator Of Transcription 3). Moreover, IL-6 (Interleukin 6) rather than IFNγ, is identified as the main candidate cytokine regulating such an immune/MER41/cognition pathway. Of note, differences between humans and chimpanzees are observed regarding the insertion sites of MER41 LTRs in the promoter regions of ID-associated genes. Finally, a survey of the human proteome has allowed us to map a protein-protein network which links the identified immune/MER41/cognition pathway to FOXP2 (Forkhead Box P2), a key TF involved in the emergence of human speech. Our work suggests that together with the evolution of immune genes, the stepped self-domestication of MER41 in the genomes of primates could have contributed to cognitive evolution. We further propose that non-inherited forms of ID might result from the untimely or quantitatively inappropriate expression of immune signals, notably IL-6, that putatively regulate cognition-associated genes via promoter-localized MER41 LTRs.
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Affiliation(s)
- Serge Nataf
- CarMeN Laboratory, INSERM U1060, INRA U1397, INSA de Lyon, Lyon-Sud Faculty of Medicine, University of Lyon, Lyon, France
- Claude Bernard University Lyon 1, Lyon, France
- Banque de Tissus et de Cellules des Hospices Civils de Lyon, Hôpital Edouard Herriot, Lyon, France
| | - Juan Uriagereka
- Department of Linguistics and School of Languages, Literatures and Cultures, University of Maryland, College Park, MD, United States
| | - Antonio Benitez-Burraco
- Department of Spanish Language, Linguistics and Literary Theory, Faculty of Philology, University of Seville, Seville, Spain
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30
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Murakami M, Kamimura D, Hirano T. Pleiotropy and Specificity: Insights from the Interleukin 6 Family of Cytokines. Immunity 2019; 50:812-831. [DOI: 10.1016/j.immuni.2019.03.027] [Citation(s) in RCA: 231] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 03/25/2019] [Accepted: 03/26/2019] [Indexed: 02/08/2023]
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31
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Scarola SJ, Perdomo Trejo JR, Granger ME, Gerecke KM, Bardi M. Immunomodulatory Effects of Stress and Environmental Enrichment in Long-Evans Rats ( Rattus norvegicus). Comp Med 2019; 69:35-47. [PMID: 30728094 DOI: 10.30802/aalas-cm-18-000025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Stress can influence the secretion of neuroendocrine mediators, thereby exposing immune cells to altered signaling and interactions. Here we investigated the synergetic effect of stress and environmental enrichment on the immune response of Long-Evans rats. Subjects (n = 46) were assigned to 5 treatment groups: acute compared with chronic stress with or without environmental enrichment, plus an unmanipulated control group. Animals also were classified as active, passive, and flexible copers according to back-test assessment. Rats were exposed to enrichment in an open-field containing objects in different areas for 30 min 3 times each week, thus modeling the effects of a temporary increase in environmental stimuli. Animals assigned to chronic stress groups were exposed to predator sound stressors for 30 min daily, whereas animals assigned to acute stress groups were exposed once each week. After 7 wk, a dermal punch biopsy was administered to activate the immune response, after which rats were challenged through a forced swim test. Biologic samples were collected to measure corticosterone, dehydroepiandrosterone (DHEA), oxytocin, testosterone, and the cytokines IL6 and IL10. Rats exposed to chronic stress had lower DHEA:corticosterone ratios, suggesting increased allostatic load. Enrichment exposure modulated these effects, lowering overall corticosterone and testosterone levels and increasing DHEA and oxytocin levels in animals exposed to the predator sound. The immune response was decreased in rats exposed to chronic stress, but the effect of environmental enrichment helped to mitigate the negative influence on cells producing IL6. Combining acute stress and exposure to an enriched environment returned a healthier profile in terms of both immune activation and stress regulation. By using a multidimensional scaling model, we found that a combination of 'good' stress and exposure to brief sessions of enriching stimuli can reliably predict health in Long-Evans rats.
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Affiliation(s)
- Samantha J Scarola
- Department of Behavioral Neuroscience, Randolph-Macon College, Ashland, Virginia
| | - Jose R Perdomo Trejo
- Department of Behavioral Neuroscience, Randolph-Macon College, Ashland, Virginia
| | - Megan E Granger
- Department of Behavioral Neuroscience, Randolph-Macon College, Ashland, Virginia
| | - Kimberly M Gerecke
- Department of Behavioral Neuroscience, Randolph-Macon College, Ashland, Virginia
| | - Massimo Bardi
- Department of Behavioral Neuroscience, Randolph-Macon College, Ashland, Virginia;,
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32
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Bialuk I, Taranta A, Winnicka MM. IL-6 deficiency alters spatial memory in 4- and 24-month-old mice. Neurobiol Learn Mem 2018; 155:21-29. [DOI: 10.1016/j.nlm.2018.06.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 05/10/2018] [Accepted: 06/13/2018] [Indexed: 11/26/2022]
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Choi SH, Bylykbashi E, Chatila ZK, Lee SW, Pulli B, Clemenson GD, Kim E, Rompala A, Oram MK, Asselin C, Aronson J, Zhang C, Miller SJ, Lesinski A, Chen JW, Kim DY, van Praag H, Spiegelman BM, Gage FH, Tanzi RE. Combined adult neurogenesis and BDNF mimic exercise effects on cognition in an Alzheimer's mouse model. Science 2018; 361:eaan8821. [PMID: 30190379 PMCID: PMC6149542 DOI: 10.1126/science.aan8821] [Citation(s) in RCA: 496] [Impact Index Per Article: 82.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 06/04/2018] [Accepted: 07/17/2018] [Indexed: 12/24/2022]
Abstract
Adult hippocampal neurogenesis (AHN) is impaired before the onset of Alzheimer's disease (AD) pathology. We found that exercise provided cognitive benefit to 5×FAD mice, a mouse model of AD, by inducing AHN and elevating levels of brain-derived neurotrophic factor (BDNF). Neither stimulation of AHN alone, nor exercise, in the absence of increased AHN, ameliorated cognition. We successfully mimicked the beneficial effects of exercise on AD mice by genetically and pharmacologically inducing AHN in combination with elevating BDNF levels. Suppressing AHN later led to worsened cognitive performance and loss of preexisting dentate neurons. Thus, pharmacological mimetics of exercise, enhancing AHN and elevating BDNF levels, may improve cognition in AD. Furthermore, applied at early stages of AD, these mimetics may protect against subsequent neuronal cell death.
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Affiliation(s)
- Se Hoon Choi
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Enjana Bylykbashi
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Zena K Chatila
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Star W Lee
- Laboratoy of Genetics, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Benjamin Pulli
- Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Gregory D Clemenson
- Laboratoy of Genetics, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Eunhee Kim
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Alexander Rompala
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Mary K Oram
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Caroline Asselin
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Jenna Aronson
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Can Zhang
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Sean J Miller
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Andrea Lesinski
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - John W Chen
- Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Doo Yeon Kim
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Henriette van Praag
- Department of Biomedical Science, Charles E. Schmidt College of Medicine, and Brain Institute, Florida Atlantic University, Jupiter, FL 33458, USA
| | - Bruce M Spiegelman
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Fred H Gage
- Laboratoy of Genetics, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Rudolph E Tanzi
- Genetics and Aging Research Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
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Prefrontal cortex-dependent innate behaviors are altered by selective knockdown of Gad1 in neuropeptide Y interneurons. PLoS One 2018; 13:e0200809. [PMID: 30024942 PMCID: PMC6053188 DOI: 10.1371/journal.pone.0200809] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 06/09/2018] [Indexed: 12/23/2022] Open
Abstract
GABAergic dysfunction has been implicated in a variety of neurological and psychiatric disorders, including anxiety disorders. Anxiety disorders are the most common type of psychiatric disorder during adolescence. There is a deficiency of GABAergic transmission in anxiety, and enhancement of GABA transmission through pharmacological means reduces anxiety behaviors. GAD67—the enzyme responsible for GABA production–has been linked to anxiety disorders. One class of GABAergic interneurons, Neuropeptide Y (NPY) expressing cells, is abundantly found in brain regions associated with anxiety and fear learning, including prefrontal cortex, hippocampus and amygdala. Additionally, NPY itself has been shown to have anxiolytic effects, and loss of NPY+ interneurons enhances anxiety behaviors. A previous study showed that knockdown of Gad1 from NPY+ cells led to reduced anxiety behaviors in adult mice. However, the role of GABA release from NPY+ interneurons in adolescent anxiety is unclear. Here we used a transgenic mouse that reduces GAD67 in NPY+ cells (NPYGAD1-TG) through Gad1 knockdown and tested for effects on behavior in adolescent mice. Adolescent NPYGAD1-TG mice showed enhanced anxiety-like behavior and sex-dependent changes in locomotor activity. We also found enhancement in two other innate behavioral tasks, nesting construction and social dominance. In contrast, fear learning was unchanged. Because we saw changes in behavioral tasks dependent upon prefrontal cortex and hippocampus, we investigated the extent of GAD67 knockdown in these regions. Immunohistochemistry revealed a 40% decrease in GAD67 in NPY+ cells in prefrontal cortex, indicating a significant but incomplete knockdown of GAD67. In contrast, there was no decrease in GAD67 in NPY+ cells in hippocampus. Consistent with this, there was no change in inhibitory synaptic transmission in hippocampus. Our results show the behavioral impact of cell-specific interneuron dysfunction and suggest that GABA release by NPY+ cells is important for regulating innate prefrontal cortex-dependent behavior in adolescents.
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Maternal Overnutrition Programs Central Inflammation and Addiction-Like Behavior in Offspring. BIOMED RESEARCH INTERNATIONAL 2018; 2018:8061389. [PMID: 30027100 PMCID: PMC6031166 DOI: 10.1155/2018/8061389] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 05/18/2018] [Accepted: 05/27/2018] [Indexed: 12/21/2022]
Abstract
Obesity or maternal overnutrition during pregnancy and lactation might have long-term consequences in offspring health. Fetal programming is characterized by adaptive responses to specific environmental conditions during early life stages. Programming alters gene expression through epigenetic modifications leading to a transgenerational effect of behavioral phenotypes in the offspring. Maternal intake of hypercaloric diets during fetal development programs aberrant behaviors resembling addiction in offspring. Programming by hypercaloric surplus sets a gene expression pattern modulating axonal pruning, synaptic signaling, and synaptic plasticity in selective regions of the reward system. Likewise, fetal programming can promote an inflammatory phenotype in peripheral and central sites through different cell types such as microglia and T and B cells, which contribute to disrupted energy sensing and behavioral pathways. The molecular mechanism that regulates the central and peripheral immune cross-talk during fetal programming and its relevance on offspring's addictive behavior susceptibility is still unclear. Here, we review the most relevant scientific reports about the impact of hypercaloric nutritional fetal programming on central and peripheral inflammation and its effects on addictive behavior of the offspring.
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Bialuk I, Winnicka MM. Facilitatory Effect of IL-6 Deficiency on Long-Term Spatial Memory in Young Adult Mice. Behav Genet 2018; 48:236-246. [DOI: 10.1007/s10519-018-9896-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 03/29/2018] [Indexed: 11/29/2022]
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Abstract
Accumulating research in rodents and humans indicates that exercise benefits brain function and may prevent or delay onset of neurodegenerative conditions. In particular, exercise modifies the structure and function of the hippocampus, a brain area important for learning and memory. This review addresses the central and peripheral mechanisms underlying the beneficial effects of exercise on the hippocampus. We focus on running-induced changes in adult hippocampal neurogenesis, neural circuitry, neurotrophins, synaptic plasticity, neurotransmitters, and vasculature. The role of peripheral factors in hippocampal plasticity is also highlighted. We discuss recent evidence that systemic factors released from peripheral organs such as muscle (myokines), liver (hepatokines), and adipose tissue (adipokines) during exercise contribute to hippocampal neurotrophin and neurogenesis levels, and memory function. A comprehensive understanding of the body-brain axis is needed to elucidate how exercise improves hippocampal plasticity and cognition.
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Affiliation(s)
- C'iana Cooper
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
| | - Hyo Youl Moon
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
- Institute of Sport Science, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Henriette van Praag
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
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Mattson MP, Moehl K, Ghena N, Schmaedick M, Cheng A. Intermittent metabolic switching, neuroplasticity and brain health. Nat Rev Neurosci 2018; 19:63-80. [PMID: 29321682 PMCID: PMC5913738 DOI: 10.1038/nrn.2017.156] [Citation(s) in RCA: 287] [Impact Index Per Article: 47.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
During evolution, individuals whose brains and bodies functioned well in a fasted state were successful in acquiring food, enabling their survival and reproduction. With fasting and extended exercise, liver glycogen stores are depleted and ketones are produced from adipose-cell-derived fatty acids. This metabolic switch in cellular fuel source is accompanied by cellular and molecular adaptations of neural networks in the brain that enhance their functionality and bolster their resistance to stress, injury and disease. Here, we consider how intermittent metabolic switching, repeating cycles of a metabolic challenge that induces ketosis (fasting and/or exercise) followed by a recovery period (eating, resting and sleeping), may optimize brain function and resilience throughout the lifespan, with a focus on the neuronal circuits involved in cognition and mood. Such metabolic switching impacts multiple signalling pathways that promote neuroplasticity and resistance of the brain to injury and disease.
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Affiliation(s)
- Mark P Mattson
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland 21224, USA
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Keelin Moehl
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland 21224, USA
| | - Nathaniel Ghena
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland 21224, USA
| | - Maggie Schmaedick
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland 21224, USA
| | - Aiwu Cheng
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland 21224, USA
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Xin X, Xin F, Chen X, Zhang Q, Li Y, Huo S, Chang C, Wang Q. Hypertonic saline for prevention of delirium in geriatric patients who underwent hip surgery. J Neuroinflammation 2017; 14:221. [PMID: 29137628 PMCID: PMC5686947 DOI: 10.1186/s12974-017-0999-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 11/08/2017] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Postoperative delirium (POD) is a common disorder in the elderly patients, and neuroinflammation is the possible underlying mechanism. This study is designed to determine whether or not hypertonic saline (HS) pre-injection can alleviate POD in aged patients. METHODS This prospective study recruited 120 geriatric patients who underwent hip surgery. The patients were randomly divided into two groups: control group (NS group) and HS group. Patients in the NS group were pre-injected with 4 mL/kg isotonic saline, and those in the HS group were pre-injected with 4 mL/kg 7.5% HS. All 120 patients were then subjected to general anesthesia. Blood samples were extracted to detect the concentration of inflammatory factors, namely, IL-1β, IL-6, IL-10, and TNF-α, and the nerve injury factor S100β. Flow cytometry was used to detect the number of monocytes in peripheral venous blood and evaluate the relationship of inflammation to delirium. The nursing delirium screening scale (Nu-DESC) was used to determine cognitive function 1 to 3 days postoperatively. RESULTS Analysis using random-effect multivariable logistic regression indicated that HS administration before anesthesia was associated with a low risk of POD (odds ratio [OR], 0.13; 95% CI, 0.04 to 0.41; P = 0.001) and few CD14 + CD16+ monocytes (β = - 0.61; 95% CI, - 0.74 to - 0.48; P = 0.000) the following day. When the association between HS and delirium was controlled for CD14 + CD16+ monocytes, the effect size became nonsignificant (odds ratio [OR], 0.86; 95% CI, 0.14 to 5.33; P = 0.874). TNF-α was significantly associated with POD (odds ratio [OR], 1.10; 95% CI, 1.05 to 1.16; P = 0.000). However, IL-1β, IL-6, IL-10, and S100β were not significantly related to POD. CONCLUSION HS can alleviate POD in geriatric patients and may inhibit the secretion of inflammatory factors by monocytes.
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Affiliation(s)
- Xi Xin
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, No 139, Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Fei Xin
- Department of Respiration, Tianjin Institute of Respiratory Diseases, Tianjin Haihe Hospital, Tianjin Medical University, Tianjin, 300350, People's Republic of China
| | - Xuguang Chen
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, No 139, Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Qi Zhang
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, No 139, Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Yanan Li
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, No 139, Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Shuping Huo
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, No 139, Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Chongfu Chang
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, No 139, Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Qiujun Wang
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, No 139, Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China.
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Custódio CS, Mello BSF, Filho AJMC, de Carvalho Lima CN, Cordeiro RC, Miyajima F, Réus GZ, Vasconcelos SMM, Barichello T, Quevedo J, de Oliveira AC, de Lucena DF, Macedo DS. Neonatal Immune Challenge with Lipopolysaccharide Triggers Long-lasting Sex- and Age-related Behavioral and Immune/Neurotrophic Alterations in Mice: Relevance to Autism Spectrum Disorders. Mol Neurobiol 2017; 55:3775-3788. [DOI: 10.1007/s12035-017-0616-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/11/2017] [Indexed: 11/30/2022]
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Rae MG, O'Malley D. Cognitive dysfunction in Duchenne muscular dystrophy: a possible role for neuromodulatory immune molecules. J Neurophysiol 2016; 116:1304-15. [PMID: 27385793 DOI: 10.1152/jn.00248.2016] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 06/29/2016] [Indexed: 11/22/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is an X chromosome-linked disease characterized by progressive physical disability, immobility, and premature death in affected boys. Underlying the devastating symptoms of DMD is the loss of dystrophin, a structural protein that connects the extracellular matrix to the cell cytoskeleton and provides protection against contraction-induced damage in muscle cells, leading to chronic peripheral inflammation. However, dystrophin is also expressed in neurons within specific brain regions, including the hippocampus, a structure associated with learning and memory formation. Linked to this, a subset of boys with DMD exhibit nonprogressing cognitive dysfunction, with deficits in verbal, short-term, and working memory. Furthermore, in the genetically comparable dystrophin-deficient mdx mouse model of DMD, some, but not all, types of learning and memory are deficient, and specific deficits in synaptogenesis and channel clustering at synapses has been noted. Little consideration has been devoted to the cognitive deficits associated with DMD compared with the research conducted into the peripheral effects of dystrophin deficiency. Therefore, this review focuses on what is known about the role of full-length dystrophin (Dp427) in hippocampal neurons. The importance of dystrophin in learning and memory is assessed, and the potential importance that inflammatory mediators, which are chronically elevated in dystrophinopathies, may have on hippocampal function is also evaluated.
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Affiliation(s)
- Mark G Rae
- Department of Physiology, University College Cork, Cork, Ireland; and
| | - Dervla O'Malley
- Department of Physiology, University College Cork, Cork, Ireland; and APC Microbiome Institute, University College Cork, Cork, Ireland
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Simberlund J, Ferretti CJ, Hollander E. Mesenchymal stem cells in autism spectrum and neurodevelopmental disorders: pitfalls and potential promises. World J Biol Psychiatry 2015; 16:368-375. [PMID: 26230216 DOI: 10.3109/15622975.2015.1067372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVES In this conceptual review, the authors discuss the promises and pitfalls in the use of mesenchymal stem cells as a potential experimental therapeutic for autism spectrum and other neurodevelopmental disorders. METHODS The relevant literature in autism spectrum disorders and other neurodevelopmental disorders regarding immune dysregulation and neuroinflammation and relevant therapeutics with mesenchymal stem cell infusion is reviewed. The relevant literature pertaining to mesenchymal stem cells and their clinical applications is also reviewed. RESULTS It is proposed that immune dysregulation and neuroinflammation play a role in the aetiology of autism spectrum disorders. Mesenchymal stem cells have been shown to have immune-modulating capabilities and are neuroprotective. There are three international studies that have utilized mesenchymal stem cell infusions as a treatment for children with autism spectrum disorders, all of which demonstrated improvement in autism rating scale scores, although each study has limitations which are described. CONCLUSIONS Mesenchymal stem cell transplantation for the treatment of autism spectrum disorders is a novel approach that deserves further investigation, however substantial methodological and theoretical challenges and pitfalls remain before this can be considered a viable therapeutic option.
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Affiliation(s)
- Jessica Simberlund
- a Department of Psychiatry , New York Presbyterian-Weill Cornell Medical College , New York , NY , USA
| | - Casara Jean Ferretti
- b Autism and Obsessive-Compulsive Spectrum Program, Department of Psychiatry , Albert Einstein College of Medicine and Montefiore Medical Center , New York , NY , USA
| | - Eric Hollander
- b Autism and Obsessive-Compulsive Spectrum Program, Department of Psychiatry , Albert Einstein College of Medicine and Montefiore Medical Center , New York , NY , USA
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Abstract
The hippocampus has a pivotal role in learning and in the formation and consolidation of memory and is critically involved in the regulation of emotion, fear, anxiety, and stress. Studies of the hippocampus have been central to the study of memory in humans and in recent years, the regional specialization and organization of hippocampal functions have been elucidated in experimental models and in human neurological and psychiatric diseases. The hippocampus has long been considered a classic model for the study of neuroplasticity as many examples of synaptic plasticity such as long-term potentiation and -depression have been identified and demonstrated in hippocampal circuits. Neuroplasticity is the ability to adapt and reorganize the structure or function to internal or external stimuli and occurs at the cellular, population, network or behavioral level and is reflected in the cytological and network architecture as well as in intrinsic properties of hippocampal neurons and circuits. The high degree of hippocampal neuroplasticity might, however, be also negatively reflected in the pronounced vulnerability of the hippocampus to deleterious conditions such as ischemia, epilepsy, chronic stress, neurodegeneration and aging targeting hippocampal structure and function and leading to cognitive deficits. Considering this framework of plasticity and vulnerability, we here review basic principles of hippocampal anatomy and neuroplasticity on various levels as well as recent findings regarding the functional organization of the hippocampus in light of the regional vulnerability in Alzheimer's disease, ischemia, epilepsy, neuroinflammation and aging.
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Affiliation(s)
- T Bartsch
- Department of Neurology, Memory Disorders and Plasticity Group, University Hospital Schleswig-Holstein, Kiel, Germany.
| | - P Wulff
- Institute of Physiology, Neurophysiology, University of Kiel, Olshausenstrasse 40, 24098 Kiel, Germany.
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Erta M, Giralt M, Esposito FL, Fernandez-Gayol O, Hidalgo J. Astrocytic IL-6 mediates locomotor activity, exploration, anxiety, learning and social behavior. Horm Behav 2015; 73:64-74. [PMID: 26143620 DOI: 10.1016/j.yhbeh.2015.06.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 05/07/2015] [Accepted: 06/25/2015] [Indexed: 12/27/2022]
Abstract
Interleukin-6 (IL-6) is a major cytokine in the central nervous system, secreted by different brain cells and with roles in a number of physiological functions. We herewith confirm and expand the importance of astrocytic production of and response to IL-6 by using transgenic mice deficient in astrocytic IL-6 (Ast-IL-6 KO) or in its receptor (Ast-IL-6R KO) in full C57Bl/6 genetic background. A major prosurvival effect of astrocytic IL-6 at early ages was clearly demonstrated. Robust effects were also evident in the control of activity and anxiety in the hole-board and elevated plus-maze, and in spatial learning in the Morris water-maze. The results also suggest an inhibitory role of IL-6 in the mechanism controlling the consolidation of hippocampus-dependent spatial learning. Less robust effects of astrocytic IL-6 system were also observed in despair behavior in the tail suspension test, and social behavior in the dominance and resident-intruder tests. The behavioral phenotype was highly dependent on age and/or sex in some cases. The phenotype of Ast-IL-6R KO mice mimicked only partially that of Ast-IL-6KO mice, which indicates both a role of astrocytes in behavior and the participation of other cells besides astrocytes. No evidences of altered function of the hypothalamic-pituitary-adrenal axis were observed. These results demonstrate that astrocytic IL-6 (acting at least partially in astrocytes) regulates normal behavior in mice.
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Affiliation(s)
- Maria Erta
- Institute of Neurosciences, and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Spain.
| | - Mercedes Giralt
- Institute of Neurosciences, and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Spain.
| | - Flavia Lorena Esposito
- Institute of Neurosciences, and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Spain.
| | - Olaya Fernandez-Gayol
- Institute of Neurosciences, and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Spain.
| | - Juan Hidalgo
- Institute of Neurosciences, and Department of Cellular Biology, Physiology and Immunology, Faculty of Biosciences, Universitat Autònoma de Barcelona, Spain.
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Aniszewska A, Chłodzińska N, Bartkowska K, Winnicka MM, Turlejski K, Djavadian RL. The expression of interleukin-6 and its receptor in various brain regions and their roles in exploratory behavior and stress responses. J Neuroimmunol 2015; 284:1-9. [PMID: 26025052 DOI: 10.1016/j.jneuroim.2015.05.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 04/27/2015] [Accepted: 05/01/2015] [Indexed: 02/07/2023]
Abstract
We examined the involvement of interleukin-6 (IL-6) and its receptor IL-6Rα on behavior and stress responses in mice. In the open field, both wild-type (WT) and IL-6 deficient mice displayed similar levels of locomotor activity; however, IL-6 deficient mice spent more time in the central part of the arena compared to control WT mice. After behavioral testing, mice were subjected to stress and then sacrificed. The levels of IL-6 and its receptor in their brains were determined. Immunohistochemical labeling of brain sections for IL-6 showed a high level of expression in the subventricular zone of the lateral ventricles and in the border zone of the third and fourth ventricles. Interestingly, 95% of the IL-6-expressing cells had an astrocytic phenotype, and the remaining 5% were microglial cells. A low level of IL-6 expression was observed in the olfactory bulb, hypothalamus, hippocampus, cerebral cortex, cerebellum, midbrain and several brainstem structures. The vast majority of IL-6-expressing cells in these structures had a neuronal phenotype. Stress increased the number of IL-6-immunoreactive astrocytes and microglial cells. The levels of the IL-6Rα receptor were increased in the hypothalamus of stressed mice. Therefore, in this study, we describe for the first time the distribution of IL-6 in various types of brain cells and in previously unreported regions, such as the subventricular zone of the lateral ventricle. Moreover, we provide data on regional distribution and expression within specific cell phenotypes. This highly differential expression of IL-6 indicates its specific roles in the regulation of neuronal and astrocytic functions, in addition to the roles of IL-6 and its receptor IL-6Rα in stress responses.
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Affiliation(s)
- A Aniszewska
- Nencki Institute of Experimental Biology, Warsaw, Poland
| | - N Chłodzińska
- Nencki Institute of Experimental Biology, Warsaw, Poland
| | - K Bartkowska
- Nencki Institute of Experimental Biology, Warsaw, Poland
| | - M M Winnicka
- Medical University of Bialystok, Bialystok, Poland
| | - K Turlejski
- Nencki Institute of Experimental Biology, Warsaw, Poland
| | - R L Djavadian
- Nencki Institute of Experimental Biology, Warsaw, Poland.
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Donegan JJ, Patton MS, Chavera TS, Berg KA, Morilak DA, Girotti M. Interleukin-6 attenuates serotonin 2a receptor signaling by activating the JAK-STAT pathway. Mol Pharmacol 2014; 87:492-500. [PMID: 25549668 DOI: 10.1124/mol.114.096289] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The serotonin 2A (5-HT2A) receptor and the proinflammatory cytokine, interleukin-6 (IL-6), have both been implicated in psychiatric disorders. Previously, we demonstrated that these molecules both facilitate cognitive flexibility, a prefrontal cortex-mediated executive function impaired in multiple mental illnesses. In this study, we tested the hypothesis that IL-6 influences 5-HT2A receptor signaling, providing a potential mechanism by which this cytokine may influence behavior. We first demonstrated that 5-HT2A receptors and IL-6-mediated STAT3 phosphorylation colocalize in cells of the prefrontal cortex, providing the neuroanatomical substrate for a potential interaction. In the neuronally derived A1A1 cell line, which expresses both IL-6 and 5-HT2A receptors, we found that IL-6 attenuates inositol phosphate (IP) accumulation in response to the 5-HT2 agonist, 2,5-dimethoxy-4-iodoamphetamine (DOI), suggesting that IL-6 can regulate 5-HT2A receptor function. To identify the signaling pathway(s) that mediate this effect, we measured DOI-mediated IP accumulation in the presence of IL-6 and either the JAK-STAT inhibitor 124 [(9β,10α,16α,23E)-2,16,20,25-tetrahydroxy-9-methyl-19-norlanosta-1,5,23-triene-3,11,22-trione], JSI-124, or the extracellular signal-regulated kinase inhibitor, 2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one (PD-98059). The IL-6 effect was blocked by JSI-124 but not PD-98059. Furthermore, silencing RNA knockdown of either JAK or STAT blocked the IL-6 effect, suggesting that IL-6-induced JAK-STAT activation can regulate 5-HT2A receptor signaling. Finally, to determine if IL-6 specifically regulates the 5-HT2A receptor system, we measured IP production mediated by another Gq-coupled receptor, bradykinin B2. IL-6 had no effect on bradykinin-mediated IP accumulation, suggesting that regulation may occur at the 5-HT2A receptor. These results may provide clues to the pathologic mechanisms underlying certain psychiatric disorders and may suggest novel therapeutic strategies for their treatment.
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Affiliation(s)
- Jennifer J Donegan
- Department of Pharmacology and Center for Biomedical Neuroscience, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Michael S Patton
- Department of Pharmacology and Center for Biomedical Neuroscience, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Teresa S Chavera
- Department of Pharmacology and Center for Biomedical Neuroscience, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Kelly A Berg
- Department of Pharmacology and Center for Biomedical Neuroscience, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - David A Morilak
- Department of Pharmacology and Center for Biomedical Neuroscience, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Milena Girotti
- Department of Pharmacology and Center for Biomedical Neuroscience, University of Texas Health Science Center at San Antonio, San Antonio, Texas
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47
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Gruol DL. IL-6 regulation of synaptic function in the CNS. Neuropharmacology 2014; 96:42-54. [PMID: 25445486 DOI: 10.1016/j.neuropharm.2014.10.023] [Citation(s) in RCA: 165] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 10/23/2014] [Accepted: 10/24/2014] [Indexed: 12/20/2022]
Abstract
A growing body of evidence supports a role for glial-produced neuroimmune factors, including the cytokine IL-6, in CNS physiology and pathology. CNS expression of IL-6 has been documented in the normal CNS at low levels and at elevated levels in several neurodegenerative or psychiatric disease states as well as in CNS infection and injury. The altered CNS function associated with these conditions raises the possibility that IL-6 has neuronal or synaptic actions. Studies in in vitro and in vivo models confirmed this possibility and showed that IL-6 can regulate a number of important neuronal and synaptic functions including synaptic transmission and synaptic plasticity, an important cellular mechanism of memory and learning. Behavioral studies in animal models provided further evidence of an important role for IL-6 as a regulator of CNS pathways that are critical to cognitive function. This review summarizes studies that have lead to our current state of knowledge. In spite of the progress that has been made, there is a need for a greater understanding of the physiological and pathophysiological actions of IL-6 in the CNS, the mechanisms underlying these actions, conditions that induce production of IL-6 in the CNS and therapeutic strategies that could ameliorate or promote IL-6 actions. This article is part of a Special Issue entitled 'Neuroimmunology and Synaptic Function'.
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Affiliation(s)
- Donna L Gruol
- Molecular and Cellular Neuroscience Department, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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Tonin PT, Valvassori SS, Lopes-Borges J, Mariot E, Varela RB, Teixeira AL, Quevedo J. Effects of ouabain on cytokine/chemokine levels in an animal model of mania. J Neuroimmunol 2014; 276:236-9. [PMID: 25288301 DOI: 10.1016/j.jneuroim.2014.09.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 09/07/2014] [Accepted: 09/10/2014] [Indexed: 01/01/2023]
Abstract
Bipolar disorder (BD) is a chronic and severe psychiatric disorder and despite its importance, little is known about the precise pathophysiology of this disorder. Several studies have reported that inflammation plays a role in the pathogenesis of BD and that cytokines are altered in these patients. Intracerebroventricular (ICV) injection of ouabain (a potent Na(+)/K(+)-ATPase inhibitor) in rats resulted in manic-like effects and it has been widely used as an animal model of bipolar mania. In this study, we assessed the cytokine levels (IL-1β, IL-6, IL-10, TNF-α, CINC-1) in the brain structures (hippocampus, striatum, frontal cortex, amygdala), serum and cerebrospinal fluid (CSF) of rats submitted to an animal model of mania induced by ouabain. Our findings demonstrated that ouabain induced hyperlocomotion in rats. However, the only cytokine that showed alteration was IL-6, which was decreased in the striatum after ouabain administration. In conclusion, despite the ouabain administration in rats be a valid model to study the physiopathology of bipolar mania, it seems that this model was not able to mimic the changes in cytokines observed in bipolar patients.
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Affiliation(s)
- Paula T Tonin
- Laboratório de Neurociências, Programa de Pós-Graduação em Ciências da Saúde (PPGCS), Unidade Acadêmica de Ciências da Saúde (UNASAU), Universidade do Extremo Sul Catarinense (UNESC), Criciúma, SC, Brazil
| | - Samira S Valvassori
- Laboratório de Neurociências, Programa de Pós-Graduação em Ciências da Saúde (PPGCS), Unidade Acadêmica de Ciências da Saúde (UNASAU), Universidade do Extremo Sul Catarinense (UNESC), Criciúma, SC, Brazil.
| | - Jéssica Lopes-Borges
- Laboratório de Neurociências, Programa de Pós-Graduação em Ciências da Saúde (PPGCS), Unidade Acadêmica de Ciências da Saúde (UNASAU), Universidade do Extremo Sul Catarinense (UNESC), Criciúma, SC, Brazil
| | - Edemilson Mariot
- Laboratório de Neurociências, Programa de Pós-Graduação em Ciências da Saúde (PPGCS), Unidade Acadêmica de Ciências da Saúde (UNASAU), Universidade do Extremo Sul Catarinense (UNESC), Criciúma, SC, Brazil
| | - Roger B Varela
- Laboratório de Neurociências, Programa de Pós-Graduação em Ciências da Saúde (PPGCS), Unidade Acadêmica de Ciências da Saúde (UNASAU), Universidade do Extremo Sul Catarinense (UNESC), Criciúma, SC, Brazil
| | - Antônio Lucio Teixeira
- Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - João Quevedo
- Laboratório de Neurociências, Programa de Pós-Graduação em Ciências da Saúde (PPGCS), Unidade Acadêmica de Ciências da Saúde (UNASAU), Universidade do Extremo Sul Catarinense (UNESC), Criciúma, SC, Brazil; Center for Experimental Models in Psychiatry, Department of Psychiatry and Behavioral Sciences, The University of Texas Medical School at Houston, Houston, TX, USA
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49
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Gruol DL, Vo K, Bray JG. Increased astrocyte expression of IL-6 or CCL2 in transgenic mice alters levels of hippocampal and cerebellar proteins. Front Cell Neurosci 2014; 8:234. [PMID: 25177271 PMCID: PMC4132577 DOI: 10.3389/fncel.2014.00234] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 07/25/2014] [Indexed: 12/16/2022] Open
Abstract
Emerging research has identified that neuroimmune factors are produced by cells of the central nervous system (CNS) and play critical roles as regulators of CNS function, directors of neurodevelopment and responders to pathological processes. A wide range of neuroimmune factors are produced by CNS cells, primarily the glial cells, but the role of specific neuroimmune factors and their glial cell sources in CNS biology and pathology have yet to be fully elucidated. We have used transgenic mice that express elevated levels of a specific neuroimmune factor, the cytokine IL-6 or the chemokine CCL2, through genetic modification of astrocyte expression to identify targets of astrocyte produced IL-6 or CCL2 at the protein level. We found that in non-transgenic mice constitutive expression of IL-6 and CCL2 occurs in the two CNS regions studied, the hippocampus and cerebellum, as measured by ELISA. In the CCL2 transgenic mice elevated levels of CCL2 were evident in the hippocampus and cerebellum, whereas in the IL-6 transgenic mice, elevated levels of IL-6 were only evident in the cerebellum. Western blot analysis of the cellular and synaptic proteins in the hippocampus and cerebellum of the transgenic mice showed that the elevated levels of CCL2 or IL-6 resulted in alterations in the levels of specific proteins and that these actions differed for the two neuroimmune factors and for the two brain regions. These results are consistent with cell specific profiles of action for IL-6 and CCL2, actions that may be an important aspect of their respective roles in CNS physiology and pathophysiology.
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Affiliation(s)
- Donna L Gruol
- Molecular and Cellular Neuroscience Department, The Scripps Research Institute La Jolla, CA, USA
| | - Khanh Vo
- Molecular and Cellular Neuroscience Department, The Scripps Research Institute La Jolla, CA, USA
| | - Jennifer G Bray
- Department of Biology, University of Wisconsin-Stevens Point Stevens Point, WI, USA
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50
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Sheridan GK, Wdowicz A, Pickering M, Watters O, Halley P, O'Sullivan NC, Mooney C, O'Connell DJ, O'Connor JJ, Murphy KJ. CX3CL1 is up-regulated in the rat hippocampus during memory-associated synaptic plasticity. Front Cell Neurosci 2014; 8:233. [PMID: 25161610 PMCID: PMC4130185 DOI: 10.3389/fncel.2014.00233] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 07/25/2014] [Indexed: 11/13/2022] Open
Abstract
Several cytokines and chemokines are now known to play normal physiological roles in the brain where they act as key regulators of communication between neurons, glia, and microglia. In particular, cytokines and chemokines can affect cardinal cellular and molecular processes of hippocampal-dependent long-term memory consolidation including synaptic plasticity, synaptic scaling and neurogenesis. The chemokine, CX3CL1 (fractalkine), has been shown to modulate synaptic transmission and long-term potentiation (LTP) in the CA1 pyramidal cell layer of the hippocampus. Here, we confirm widespread expression of CX3CL1 on mature neurons in the adult rat hippocampus. We report an up-regulation in CX3CL1 protein expression in the CA1, CA3 and dentate gyrus (DG) of the rat hippocampus 2 h after spatial learning in the water maze task. Moreover, the same temporal increase in CX3CL1 was evident following LTP-inducing theta-burst stimulation in the DG. At physiologically relevant concentrations, CX3CL1 inhibited LTP maintenance in the DG. This attenuation in dentate LTP was lost in the presence of GABAA receptor/chloride channel antagonism. CX3CL1 also had opposing actions on glutamate-mediated rise in intracellular calcium in hippocampal organotypic slice cultures in the presence and absence of GABAA receptor/chloride channel blockade. Using primary dissociated hippocampal cultures, we established that CX3CL1 reduces glutamate-mediated intracellular calcium rises in both neurons and glia in a dose dependent manner. In conclusion, CX3CL1 is up-regulated in the hippocampus during a brief temporal window following spatial learning the purpose of which may be to regulate glutamate-mediated neurotransmission tone. Our data supports a possible role for this chemokine in the protective plasticity process of synaptic scaling.
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Affiliation(s)
- Graham K Sheridan
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland ; Department of Physiology, Development and Neuroscience, University of Cambridge Cambridge, UK
| | - Anita Wdowicz
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Mark Pickering
- School of Medicine and Medical Science, Health Sciences Centre, University College Dublin Dublin, Ireland
| | - Orla Watters
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Paul Halley
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Niamh C O'Sullivan
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Claire Mooney
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - David J O'Connell
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - John J O'Connor
- UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
| | - Keith J Murphy
- Neurotherapeutics Research Group, UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin Dublin, Ireland
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