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Brenhouse HC, Danese A, Grassi-Oliveira R. Neuroimmune Impacts of Early-Life Stress on Development and Psychopathology. Curr Top Behav Neurosci 2018; 43:423-447. [PMID: 30003509 DOI: 10.1007/7854_2018_53] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Maltreatment and trauma in childhood, termed early-life stress (ELS), has long-term effects on the immune system. ELS impacts immune signaling at the time of exposure but also disrupts the developmental trajectory of certain immunological processes, both in the periphery and in the brain. One consequence of these early alterations is a heightened immune response to stressors later in life. However, chronic and sustained inflammatory response can also lead to excitotoxicity and prevent typical brain development. In this chapter, we discuss current progress toward understanding the contribution of neuroimmune signaling to ELS-attributable dysfunction or maladaptation with a focus on postnatal experiences. To do so we first present an operational definition of ELS. Then, we offer a brief overview of the immune system and neuroimmune development, followed by a section discussing the interaction between immunity, childhood trauma, and mental disorders in humans. We present evidence from animal models about immune alterations after ELS and discuss the ways in which ELS-induced immune changes ultimately affect brain and behavior, as well as the importance of individual differences and future directions in this field. Taken together, we submit that when encountered with ELS, some core brain circuits could develop differently via various mechanisms involving dysfunctional immune reprograming. However, given the remarkable plasticity of both the brain and the immune system, many of the deleterious effects of ELS may be mitigated with interventions that account for sex and target neuroimmune interactions over the lifespan.
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Affiliation(s)
| | - Andrea Danese
- Social, Genetic, and Developmental Psychiatry Centre, Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, UK
| | - Rodrigo Grassi-Oliveira
- Developmental Cognitive Neuroscience Lab (DCNL), Graduate Program in Psychology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
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Linsenbardt HR, Cook JL, Young EE, Vichaya EG, Young CR, Reusser NM, Storts R, Welsh CJ, Meagher MW. Social disruption alters pain and cognition in an animal model of multiple sclerosis. J Neuroimmunol 2015; 288:56-68. [PMID: 26531695 DOI: 10.1016/j.jneuroim.2015.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/09/2015] [Accepted: 09/10/2015] [Indexed: 01/29/2023]
Abstract
Although pain and cognitive deficits are widespread and debilitating symptoms of multiple sclerosis (MS), they remain poorly understood. Theiler's murine encephalomyelitis virus (TMEV) infection is an animal model of MS where disease course is exacerbated by prior stressors. Here chronic infection coupled with prior social stress increased pain behavior and impaired hippocampal-dependent memory consolidation during the demyelinating phase of disease in SJL mice. These results suggest that the TMEV model may be useful in investigating pain and cognitive impairments in MS. However, in contrast to prior Balb/cJ studies, stress failed to consistently alter behavioral and physiological indicators of disease course.
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Affiliation(s)
- H R Linsenbardt
- Department of Psychology, Texas A&M University, College Station, TX, United States; Texas A&M Institute for Neuroscience, Texas A&M University, College Station, TX, United States
| | - J L Cook
- Department of Psychology, Texas A&M University, College Station, TX, United States
| | - E E Young
- Department of Psychology, Texas A&M University, College Station, TX, United States
| | - E G Vichaya
- Department of Psychology, Texas A&M University, College Station, TX, United States
| | - C R Young
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States
| | - N M Reusser
- Department of Psychology, Texas A&M University, College Station, TX, United States
| | - R Storts
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX, United States
| | - C J Welsh
- Texas A&M Institute for Neuroscience, Texas A&M University, College Station, TX, United States; Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States
| | - M W Meagher
- Department of Psychology, Texas A&M University, College Station, TX, United States; Texas A&M Institute for Neuroscience, Texas A&M University, College Station, TX, United States.
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Briggs FB, Green MC, Ritterman Weintraub ML. Role of socioeconomic position in multiple sclerosis etiology. Neurodegener Dis Manag 2015; 5:333-43. [DOI: 10.2217/nmt.15.22] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Multiple sclerosis (MS) is a debilitating autoimmune disease with a prominent inflammatory component. There have been strides identifying genetic and environmental MS risk factors, though much of the disease risk remains unknown. Recent large observational studies suggest adverse socioeconomic position increases the risk for MS, however the mediating biological processes are not understood. We hypothesize a prominent role for stress response, both the autonomic nervous system and the hypothalamic–pituitary–adrenal axis, which become maladaptive under frequent or chronic stimulation resulting in a proinflammatory phenotype. Thus, adverse SEP and chronic stress may predispose individuals for MS.
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Affiliation(s)
- Farren B Briggs
- Department of Epidemiology & Biostatistics, School of Medicine, Case Western Reserve University, Cleveland, OH 44106-4945, USA
| | - Matthew C Green
- Department of Public Health, Touro University California, CA 94592, USA
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Ganguly P, Brenhouse HC. Broken or maladaptive? Altered trajectories in neuroinflammation and behavior after early life adversity. Dev Cogn Neurosci 2014; 11:18-30. [PMID: 25081071 PMCID: PMC4476268 DOI: 10.1016/j.dcn.2014.07.001] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 06/23/2014] [Accepted: 07/02/2014] [Indexed: 12/11/2022] Open
Abstract
This paper reviews how early life adversity alters neuroimmune mechanisms. Neuroimmune sensitization from early life adversity impacts circuitry at discrete life stages. Neuroimmune and neurodevelopmental influences can impact behavior and vulnerability. Sexual dimorphism in immune and brain development yield distinct effects of early life adversity.
Exposure to adversity and stress early in development yields vulnerability to mental illnesses throughout the lifespan. Growing evidence suggests that this vulnerability has mechanistic origins involving aberrant development of both neurocircuitry and neuro-immune activity. Here we review the current understanding of when and how stress exposure initiates neuroinflammatory events that interact with brain development. We first review how early life adversity has been associated with various psychopathologies, and how neuroinflammation plays a role in these pathologies. We then summarize data and resultant hypotheses describing how early life adversity may particularly alter neuro-immune development with psychiatric consequences. Finally, we review how sex differences contribute to individualistic vulnerabilities across the lifespan. We submit the importance of understanding how stress during early development might cause outright neural or glial damage, as well as experience-dependent plasticity that may insufficiently prepare an individual for sex-specific or life-stage specific challenges.
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Affiliation(s)
- Prabarna Ganguly
- Northeastern University, Psychology Department, 125 Nightingale Hall, 360 Huntington Avenue, Boston, MA 02115, USA.
| | - Heather C Brenhouse
- Northeastern University, Psychology Department, 125 Nightingale Hall, 360 Huntington Avenue, Boston, MA 02115, USA.
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