scholarly journals Development of PTSD-like behavior in adult mice after observing an acute traumatic event

2018 ◽  
Author(s):  
Ray X. Lee ◽  
Greg J. Stephens ◽  
Bernd Kuhn
Keyword(s):  
Social Interactions ◽  
Social Stress ◽  
Traumatic Event ◽  
Common Factor ◽  
Fine Scale ◽  
Behavioral Differences ◽  
Post Traumatic Stress ◽  
Multiple Control ◽  
Aggressive Encounter ◽  
Wide Range

SummaryIn human post-traumatic stress disorder (PTSD), a major psychiatry challenge is how diverse stress reactions emerge after a protracted symptom-free period. Here, we study the behavioral development in mice isolated after observing an aggressive encounter inflicted upon their pair-housed partners and compared the results with those in multiple control paradigms. Compared with mice plainly isolated, mice isolated following the acute witnessing social stress gradually developed a wide range of long-term differences of their physiological conditions, spontaneous behaviors, and social interactions, including paradoxical results if interpreted in traditional ways. To address this developmental diversity, we applied fine-scale behavioral analysis to standard behavioral tests and showed that the seemingly sudden emergent behavioral differences developed gradually. Mice showed different developmental patterns in different zones of a behavior testing apparatus. However, the results of the fine-scale analysis together with state-space behavioral characterization allow a consistent interpretation of the seemingly conflicting observations among multiple tests. Interestingly, these behavioral differences were not observed if the aggressive encounter happened to a stranger mouse. Additionally, traumatized mice showed rebound responses to their partners after the long separation. In contrast, mice pair-housed with their attacked partners after the aggressive encounters still showed a difference in social interactions, while a difference in spontaneous behaviors did not occur. Accordingly, we propose that social relationship is the single common factor underlying the otherwise independent development of behavioral differences in this mouse paradigm and that the gained insights could have parallels in human PTSD development.

Longitudinal associations between post-traumatic distress and depressive symptoms following a traumatic event: a test of three models

2010 ◽  
Vol 40 (10) ◽  
pp. 1669-1678 ◽  
Author(s):  
I. Schindel-Allon ◽  
I. M. Aderka ◽  
G. Shahar ◽  
M. Stein ◽  
E. Gilboa-Schechtman
Keyword(s):  
Depressive Symptoms ◽  
Structural Equation ◽  
Traumatic Event ◽  
Common Factor ◽  
Sem Analysis ◽  
Equation Modeling ◽  
Change Model ◽  
Ptsd Symptoms ◽  
Post Traumatic Stress ◽  
Post Traumatic

BackgroundSymptoms of post-traumatic stress disorder (PTSD) and depression are highly co-morbid following a traumatic event. Nevertheless, decisive evidence regarding the direction of the relationship between these clinical entities is missing.MethodThe aim of the present study was to examine the nature of this relationship by comparing a synchronous change model (PTSD and depression are time synchronous, possibly stemming from a third common factor) with a demoralization model (i.e. PTSD symptoms causing depression) and a depressogenic model (i.e. depressive symptoms causing PTSD symptoms). Israeli adult victims of single-event traumas (n=156) were assessed on measures of PTSD and depression at 2, 4 and 12 weeks post-event.ResultsA cross-lagged structural equation modeling (SEM) analysis provided results consistent with the synchronous change model and the depressogenic model.ConclusionsDepressive symptoms may play an important role in the development of post-traumatic symptoms.

Geographic Variation in Behavior

1999 ◽  
Keyword(s):  
Geographic Variation ◽  
Animal Behavior ◽  
Evolutionary Biology ◽  
Behavioral Characteristics ◽  
Behavioral Differences ◽  
Methodological Issues ◽  
Behavioral Evolution ◽  
Evolutionary Patterns ◽  
Wide Range

Studies of animal behavior often assume that all members of a species exhibit the same behavior. Geographic Variation in Behavior shows that, on the contrary, there is substantional variation within species across a wide range of taxa. Including work from pioneers in the field, this volume provides a balanced overview of research on behavioral characteristics that vary geographically. The authors explore the mechanisms by which behavioral differences evolve and examine related methodological issues. Taken together, the work collected here demonstrates that genetically based geographic variation may be far more widespread than previously suspected. The book also shows how variation in behavior can illuminate both behavioral evolution and general evolutionary patterns. Unique among books on behavior in its emphasis on geographic variation, this volume is a valuable new resource for students and researchers in animal behavior and evolutionary biology.

scholarly journals A Bacterial Tower of Babel: Quorum-Sensing Signaling Diversity and Its Evolution

2020 ◽  
Vol 74 (1) ◽  
pp. 587-606 ◽  
Author(s):  
Nitzan Aframian ◽  
Avigdor Eldar
Keyword(s):  
Quorum Sensing ◽  
Social Interactions ◽  
Signal Molecules ◽  
Allelic Polymorphism ◽  
Dependent Manner ◽  
Tower Of Babel ◽  
Cognate Receptor ◽  
Wide Range ◽  
Family Code ◽  
Bacterial Groups

Quorum sensing is a process in which bacteria secrete and sense a diffusible molecule, thereby enabling bacterial groups to coordinate their behavior in a density-dependent manner. Quorum sensing has evolved multiple times independently, utilizing different molecular pathways and signaling molecules. A common theme among many quorum-sensing families is their wide range of signaling diversity—different variants within a family code for different signal molecules with a cognate receptor specific to each variant. This pattern of vast allelic polymorphism raises several questions—How do different signaling variants interact with one another? How is this diversity maintained? And how did it come to exist in the first place? Here we argue that social interactions between signaling variants can explain the emergence and persistence of signaling diversity throughout evolution. Finally, we extend the discussion to include cases where multiple diverse systems work in concert in a single bacterium.

scholarly journals Post-traumatic stress impact on health outcomes in Gulf War Illness

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Mary Jeffrey ◽  
Fanny Collado ◽  
Jeffrey Kibler ◽  
Christian DeLucia ◽  
Steven Messer ◽  
...  
Keyword(s):  
Health Outcomes ◽  
Short Form ◽  
Gulf War ◽  
Ptsd Symptoms ◽  
Symptom Presentation ◽  
Trauma Symptoms ◽  
Post Traumatic Stress ◽  
Gulf War Illness ◽  
Cut Point ◽  
Wide Range

Abstract Background Gulf War Illness (GWI) is a chronic, multi-symptomatic disorder affecting an estimated 25–32% of the returning military veterans of the 1990–1991 Persian Gulf War. GWI presents with a wide range of symptoms including fatigue, muscle pain, cognitive problems, insomnia, rashes and gastrointestinal issues and continues to be a poorly understood illness. This heterogeneity of GWI symptom presentation complicates diagnosis as well as the identification of effective treatments. Defining subgroups of the illness may help alleviate these complications. Our aim is to determine if GWI can be divided into distinct subgroups based on PTSD symptom presentation. Methods Veterans diagnosed with GWI (n = 47) and healthy sedentary veteran controls (n = 52) were recruited through the Miami Affairs (VA) Medical Health Center. Symptoms were assessed via the RAND short form health survey (36), the multidimensional fatigue inventory, and the Davidson trauma scale. Hierarchal regression modeling was performed on measures of health and fatigue with PTSD symptoms as a covariate. This was followed by univariate analyses conducted with two separate GWI groups based on a cut-point of 70 for their total Davidson Trauma Scale value and performing heteroscedastic t-tests across all measures. Results Overall analyses returned two symptom-based subgroups differing significantly across all health and trauma symptoms. These subgroups supported PTSD symptomatology as a means to subgroup veterans. Hierarchical models showed that GWI and levels of PTSD symptoms both impact measures of physical, social, and emotional consequences of poor health (ΔR2 = 0.055–0.316). However, GWI appeared to contribute more to fatigue measures. Cut-point analysis retained worse health outcomes across all measures for GWI with PTSD symptoms compared to those without PTSD symptoms, and healthy controls. Significant differences were observed in mental and emotional measures. Conclusions Therefore, this research supports the idea that comorbid GWI and PTSD symptoms lead to worse health outcomes, while demonstrating how GWI and PTSD symptoms may uniquely contribute to clinical presentation.

A prospective study to determine the clinical utility of pharmacogenetic testing of veterans with treatment-resistant depression

2021 ◽  
pp. 026988112110152
Author(s):  
Michael J McCarthy ◽  
Yucui Chen ◽  
Anna Demodena ◽  
Susan G Leckband ◽  
Eileen Fischer ◽  
...  
Keyword(s):  
Social Stress ◽  
Risk Groups ◽  
Adverse Outcomes ◽  
Treatment Resistant Depression ◽  
Post Traumatic Stress ◽  
Treatment Resistant ◽  
Treatment As Usual ◽  
Resistant Depression ◽  
The Difference ◽  
A Prospective Study

Background: Pharmacotherapies for depression are often ineffective and treatment-resistant depression (TRD) is common across bipolar disorder (BD), major depressive disorder (MDD), and post-traumatic stress disorder (PTSD). Patient genetic information can be used to predict treatment outcomes. Prospective studies indicate that pharmacogenetic (PGX) tests have utility in the treatment of depression. However, few studies have examined the utility of PGX in other diagnoses typified by depression, or in veterans, a cohort with high rates of medical comorbidity, social stress, and suicide. Aim: To determine the efficacy of genetically guided pharmacological treatment of TRD. Methods: We conducted an 8-week, prospective, multisite, single-blind study in 182 veterans with TRD including patients with BD, MDD, and PTSD. Subjects were randomly assigned to PGX-guided treatment in which the clinician incorporated PGX information into decision-making, or treatment as usual (TAU). Results: Overall, the PGX group improved marginally faster compared to TAU, but the difference was not statistically significant. Secondary analyses revealed that only PTSD patients showed a potential benefit from PGX testing. Patients predicted by PGX testing to have moderate levels of genetic risk showed a significant benefit from the PGX-guided treatment, whereas other risk groups demonstrated no benefit. Clinicians generally found the PGX test was useful, particularly in more depressed patients and/or those with more warnings for significant or serious adverse outcomes. Clinicians more often used the results to select a drug, but only rarely to adjust dosing. Conclusions: The data reveal possible group differences in the utility of PGX testing in veterans with TRD. ClinicalTrials.gov Identifier: NCT04469322.

scholarly journals Association between Work-Related Trauma Exposure and Posttraumatic Stress Symptoms among Child Welfare Workers in Japan: A Cross-Sectional Study

2021 ◽  
Vol 18 (7) ◽  
pp. 3541
Author(s):  
Mayumi Kataoka ◽  
Daisuke Nishi
Keyword(s):  
Multivariate Analysis ◽  
Child Welfare ◽  
Traumatic Event ◽  
Traumatic Events ◽  
Child Welfare Workers ◽  
Cumulative Number ◽  
Ptsd Symptoms ◽  
Post Traumatic Stress ◽  
Work Related ◽  
Welfare Workers

Child welfare workers often experience work-related traumatic events and may be at risk of post-traumatic stress disorder (PTSD), which can hinder early interventions for child abuse. This study examined the association between each single work-related traumatic event experienced by child welfare workers and the cumulative number of traumatic event types with PTSD symptoms. A checklist of traumatic events was used to investigate work-related traumatic events. The PTSD checklist for DSM-5 (PCL-5) was used to screen for PTSD symptoms. Two multivariate analyses were performed. A total of 140 workers were included in the analyses. In the first multivariate analysis, the event, “Witnessed a parent violently beating, hitting, kicking, or otherwise injuring a child or the other parent during work” (β = 11.96; 95% CI, 2.11–21.80; p < 0.05) and resilience (β = −0.60; 95% CI, −0.84 to −0.36; p < 0.01) were significantly associated with PTSD symptoms, as was resilience in the second multivariate analysis (β = −0.60; 95%CI, −0.84 to −0.36; p < 0.01). The association between the cumulative number of event types and PTSD symptoms was not significant, but it was stronger when the cumulative number was four or more. The findings suggest the importance of reducing child welfare worker exposure to traumatic events.

scholarly journals The biopsychosocial-digital continuum of foot orthosis practice and research: the VALUATOR model

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Kevin Deschamps ◽  
Chris Nester ◽  
Veronica Newton ◽  
Gabriel Gijon-Nogueron ◽  
Engin Simsek ◽  
...  
Keyword(s):  
Therapeutic Efficacy ◽  
Social Stress ◽  
Clinical Value ◽  
Holistic Model ◽  
Scientific Discussion ◽  
Wide Range ◽  
Clinical Strategies ◽  
Person Centered Approach ◽  
First Time ◽  
Foot Orthosis

AbstractFoot orthoses have been used for decades despite uncertainty surrunding their therapeutic efficacy. Orthoses have been used exclusively to affect neuro-biomechanical input and outcome variables, however, there is emerging evidence that therapeutic efficacy may be affected by a psychological stimulus. Critical appraisal of the literature highlights that there is no holistic model upon which foot orthosis practice is taught, practised nor investigated. This paper introduces a conceptual model of foot orthosis practice (Value Based Foot Orthosis Practice (VALUATOR) model) that embraces a broader range of factors that are pertinent to orthosis practice, incorporating contemporary health service behaviours and values into orthosis practice for the first time.Within the VALUATOR model, foot orthosis design and clinical value is considered along a bio-psycho-social-digital continuum that reflects the reality of foot orthosis practice. The model contextualises the variable outcomes that are observed in research and practice within 6 key areas: 1) value, 2) person-centered approach, 3) zone of optimal bio-psycho-social stress, 4) bio-psycho-social assessment, 5) monitoring, 6) primary and secondary clinical strategies.The VALUATOR model is targeted at students, lecturers, scientists and practitioners and includes carefully chosen terminology to support a robust basis for educational and scientific discussion. It is believed that it provides a contemporary viewpoint and a structured conceptual metaphor that builds on existing evidence from a wide range of sources, invites constructive intellectual debate, and is anchored in the experiences of practitioners too. Stress testing the VALUATOR model will help determine its model and support further developments and evolution of orthotic practice in a evidence based way.

scholarly journals Exploring Interactions between the Gut Microbiota and Social Behavior through Nutrition

Genes ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 534 ◽  
Author(s):  
Cristian Pasquaretta ◽  
Tamara Gómez-Moracho ◽  
Philipp Heeb ◽  
Mathieu Lihoreau
Keyword(s):  
Social Behavior ◽  
Gut Microbiota ◽  
Social Interactions ◽  
Nutritional Ecology ◽  
Social Consequences ◽  
Complex Interactions ◽  
Wide Range ◽  
Nutritional Geometry ◽  
Social Animals

Microbes influence a wide range of host social behaviors and vice versa. So far, however, the mechanisms underpinning these complex interactions remain poorly understood. In social animals, where individuals share microbes and interact around foods, the gut microbiota may have considerable consequences on host social interactions by acting upon the nutritional behavior of individual animals. Here we illustrate how conceptual advances in nutritional ecology can help the study of these processes and allow the formulation of new empirically testable predictions. First, we review key evidence showing that gut microbes influence the nutrition of individual animals, through modifications of their nutritional state and feeding decisions. Next, we describe how these microbial influences and their social consequences can be studied by modelling populations of hosts and their gut microbiota into a single conceptual framework derived from nutritional geometry. Our approach raises new perspectives for the study of holobiont nutrition and will facilitate theoretical and experimental research on the role of the gut microbiota in the mechanisms and evolution of social behavior.

Support for the mutual maintenance of pain and post-traumatic stress disorder symptoms

2009 ◽  
Vol 40 (7) ◽  
pp. 1215-1223 ◽  
Author(s):  
A. Liedl ◽  
M. O'Donnell ◽  
M. Creamer ◽  
D. Silove ◽  
A. McFarlane ◽  
...  
Keyword(s):  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Structural Equation ◽  
Stress Disorder ◽  
Traumatic Event ◽  
Saturated Model ◽  
Post Traumatic Stress ◽  
Post Injury ◽  
Post Traumatic ◽  
The Relationship

BackgroundPain and post-traumatic stress disorder (PTSD) are frequently co-morbid in the aftermath of a traumatic event. Although several models attempt to explain the relationship between these two disorders, the mechanisms underlying the relationship remain unclear. The aim of this study was to investigate the relationship between each PTSD symptom cluster and pain over the course of post-traumatic adjustment.MethodIn a longitudinal study, injury patients (n=824) were assessed within 1 week post-injury, and then at 3 and 12 months. Pain was measured using a 100-mm Visual Analogue Scale (VAS). PTSD symptoms were assessed using the Clinician-Administered PTSD Scale (CAPS). Structural equation modelling (SEM) was used to identify causal relationships between pain and PTSD.ResultsIn a saturated model we found that the relationship between acute pain and 12-month pain was mediated by arousal symptoms at 3 months. We also found that the relationship between baseline arousal and re-experiencing symptoms, and later 12-month arousal and re-experiencing symptoms, was mediated by 3-month pain levels. The final model showed a good fit [χ2=16.97, df=12, p>0.05, Comparative Fit Index (CFI)=0.999, root mean square error of approximation (RMSEA)=0.022].ConclusionsThese findings provide evidence of mutual maintenance between pain and PTSD.

scholarly journals Evaluation of the effects of L-Theanine on neurobehavior in an adult male Sprague-Dawley Rat Model of PTSD

2019 ◽  
Vol 6 (3) ◽  
pp. 299-308
Author(s):  
John E Buonora ◽  
Patrick M Krum ◽  
Tomás Eduardo Ceremuga
Keyword(s):  
Spatial Memory ◽  
Traumatic Event ◽  
Forced Swim Test ◽  
The United States ◽  
Traumatic Experiences ◽  
Stress Model ◽  
Sprague Dawley ◽  
Post Traumatic Stress ◽  
Post Traumatic ◽  
Shock Stress

Post-traumatic stress disorder (PTSD) continues to be one of the most common mental health disorders in the United States and may occur in response to traumatic experiences. Currently, there are no interventions that prevent the development of PTSD. L-Theanine (L-Th), a major compound in green tea has been found to decrease anxiety and prevent memory impairment and may have potential effects in the prevention of PTSD. Sixty rats were divided into six experimental groups: control vehicle, control L-Th, control naïve, PTSD vehicle, PTSD Pre-L-Th (prophylactic), PTSD Post-L-Th (non-prophylactic). PTSD was induced by a 3-day restraint/tail shock stress model. The effects of L-Th on neurobehavior were evaluated by Elevated Plus-Maze (EPM), Morris Water Maze (MWM), and Forced Swim Test (FST). Our study found that the total food intake weight of PTSD Pre-L-Th (prophylactic) rats were significantly increased compared to that of PTSD vehicle rats (p = .04). Administration of L-Th 24 hours before the initial PTSD event or for 10 days following the last PTSD stress event did not statistically improve mean open arm exploration on the EPM, spatial memory, and learning in the MWM or behavioral despair measured by the FST (p > 0.05). Although the 3-day restraint/tail shock stress model caused stress in the rodents, it did not produce reported PTSD-like anxiety and depression or spatial memory loss. The effect of Pre-L-Th or Post-L-Th treatment, on the neurobehavioral functions could not be effectively evaluated. However, this study provides a foundation for future studies to try different rodent PTSD models to induce PTSD-like neurobehavioral impairments to explore dosage, frequency, as well as the duration of L-Th administration before and/or after the post-traumatic event. The 3-day restraint/tail shock stress model caused stress in the rodents, Pre-L-Theanine treatment preconditioned the PTSD rats to endure stress.

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