scholarly journals Roles of the Serotoninergic System in Coping with Traumatic Stress

2021 ◽  
Author(s):  
Tania Vitalis ◽  
Catherine Verney
Keyword(s):  
Traumatic Stress ◽  
Sleep Disturbances ◽  
Stressful Events ◽  
Serotoninergic System ◽  
Post Traumatic Stress ◽  
Close Relationship ◽  
Post Traumatic ◽  
And Coping ◽  
Exposure To Trauma ◽  
The Brain

Post-Traumatic Stress Disorder (PTSD) is characterized by substantial physiological and/or psychological distress following exposure to trauma. Intrusive fear memories often lead to persistent avoidance of stimuli associated with the trauma, detachment from others, irritability and sleep disturbances. Different key structures in the brain are involved with fear conditioning, fear extinction and coping. The limbic system, namely, the amygdala complex in close relationship with the hippocampal hub and the prefrontal cortex play central roles in the integration and in coping with fear memories. Serotonin acting both as a neurotransmitter and as a neurohormone participates in regulating the normal and pathological activity of these anatomic structures. We review the literature analyzing how the different actors of the serotoninergic system (5-HT receptors, transporters and anabolic and catabolic pathways) may be involved in regulating the sensitivity to highly stressful events and hopefully coping with them.

Putative Blood Somatic Mutations in Post-Traumatic Stress Disorder-Symptomatic Soldiers: High Impact of Cytoskeletal and Inflammatory Proteins

2021 ◽  
Vol 79 (4) ◽  
pp. 1723-1734
Author(s):  
Shlomo Sragovich ◽  
Michael Gershovits ◽  
Jacqueline C.K. Lam ◽  
Victor O.K. Li ◽  
Illana Gozes
Keyword(s):  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Somatic Mutations ◽  
Stress Disorder ◽  
Ptsd Symptom ◽  
High Impact ◽  
Post Traumatic Stress ◽  
Blood Samples ◽  
Post Traumatic ◽  
The Brain

Background: We recently discovered autism/intellectual disability somatic mutations in postmortem brains, presenting higher frequency in Alzheimer’s disease subjects, compared with the controls. We further revealed high impact cytoskeletal gene mutations, coupled with potential cytoskeleton-targeted repair mechanisms. Objective: The current study was aimed at further discerning if somatic mutations in brain diseases are presented only in the most affected tissue (the brain), or if blood samples phenocopy the brain, toward potential diagnostics. Methods: Variant calling analyses on an RNA-seq database including peripheral blood samples from 85 soldiers (58 controls and 27 with symptoms of post-traumatic stress disorder, PTSD) was performed. Results: High (e.g., protein truncating) as well as moderate impact (e.g., single amino acid change) germline and putative somatic mutations in thousands of genes were found. Further crossing the mutated genes with autism, intellectual disability, cytoskeleton, inflammation, and DNA repair databases, identified the highest number of cytoskeletal-mutated genes (187 high and 442 moderate impact). Most of the mutated genes were shared and only when crossed with the inflammation database, more putative high impact mutated genes specific to the PTSD-symptom cohorts versus the controls (14 versus 13) were revealed, highlighting tumor necrosis factor specifically in the PTSD-symptom cohorts. Conclusion: With microtubules and neuro-immune interactions playing essential roles in brain neuroprotection and Alzheimer-related neurodegeneration, the current mutation discoveries contribute to mechanistic understanding of PTSD and brain protection, as well as provide future diagnostics toward personalized military deployment strategies and drug design.

Evidence of diffuse damage in frontal and occipital cortex in the brain of patients with post-traumatic stress disorder

2011 ◽  
Vol 33 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Maricla Tavanti ◽  
Marco Battaglini ◽  
Federico Borgogni ◽  
Letizia Bossini ◽  
Sara Calossi ◽  
...  
Keyword(s):  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Stress Disorder ◽  
Occipital Cortex ◽  
Post Traumatic Stress ◽  
Post Traumatic ◽  
The Brain

scholarly journals Levels of biogenic amines in the brain of rats at experimental post-traumatic stress disorder development

2015 ◽  
Vol 96 (5) ◽  
pp. 806-810
Author(s):  
R V Deev ◽  
Yu M Shatrova ◽  
A I Sinitskiy ◽  
N S Molchanova ◽  
A K Yunusova ◽  
...  
Keyword(s):  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Acid Level ◽  
Stress Disorder ◽  
Aminobutyric Acid ◽  
Behavioral Activity ◽  
Gamma Aminobutyric Acid ◽  
Post Traumatic Stress ◽  
Post Traumatic ◽  
The Brain

Aim. To study the changes in levels of biogenic amines-neurotransmitters in the brain at experimental post-traumatic stress disorder development in rats. Methods. Post-traumatic stress disorder was modeled by keeping 48 outbred male rats in under constant and inescapable strong unconditioned stimulus. The control group included 16 intact animals, not exposed to stress influences. The levels of 3,4-dihydroxyphenylalanine, dopamine, norepinephrine, epinephrine and gamma-aminobutyric acid were determined by fluorometric methods. Behavioral activity of animals was evaluated on the day 3, 7, 10 and 14 by «open field» and «elevated plus maze» actinographs. Results. When comparing the concentrations of studied neurotransmitters in the brain of control animals with experimental groups, reflecting the development of post-traumatic stress disorder at the time, adrenaline and 3,4-dihydroxyphenylalanine levels were increased on the third day, level of norepinephrine was reduced on the seventh day, 3,4-dihydroxyphenylalanine, dopamine, norepinephrine levels were elevaled, gamma-aminobutyric acid level was reduced on the tenth day, gamma-aminobutyric acid level was increased on the fourteenth day after the stress. Conclusion. According to the results of the correlation analysis, the largest contribution to the development of behavioral disorders are made by altered brain level of gamma-aminobutyric acid at the time of post-traumatic stress disorder formation (tenth and fourteenth day). At the earlier stages (third and seventh day), the relationship of rats behavioral activity and altered 3,4-dihydroxyphenylalanine and norepinephrine brain levels was shown.

Exposure to stressful events during a peacekeeping mission may have a price: The impact on trait of negative and positive affect and mental health

2018 ◽  
Vol 25 (9) ◽  
pp. 1285-1291
Author(s):  
Roberta Sonia Rodrigues Álvares ◽  
Ana Carolina Ferraz Mendonça-de-Souza ◽  
Antônio Fernando Araujo Duarte ◽  
Thaís Medeiros Gameiro ◽  
Nastassja Lopes Fischer ◽  
...  
Keyword(s):  
Negative Affect ◽  
Positive Affect ◽  
Post Traumatic Stress Disorder ◽  
Traumatic Stress ◽  
Stress Disorder ◽  
Stressful Events ◽  
Depression Symptoms ◽  
Post Traumatic Stress ◽  
Post Traumatic ◽  
The Impact

We evaluated the participants’ negative affect, positive affect, post-traumatic stress disorder, and depression symptoms before and after a peacekeeping mission. Depression symptoms and positive affect after mission were significantly associated with exposure to stressful events during the mission, controlled by the respective characteristics before mission. Negative affect and post-traumatic stress disorder symptoms after mission had a tendency to be associated with exposure to stressful events during the mission, controlled by the respective characteristics before mission. In conclusion, even in healthy and physically active male peacekeepers, those more exposed to stressful events could be more vulnerable to present negative outcomes.

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