Abstract:
:The importance of catecholamines in post-traumatic stress disorder (PTSD) still needs to be explored. We aimed to evaluate epinephrine's (EPI) causal role and molecular mechanism for the persistence of PTSD traumatic memories. Wild-type (WT) and EPI-deficient mice (phenylethanolamine-N-methyltransferase-knockout mice, Pnmt-KO) were induced with PTSD and behavioral tests were performed. Some Pnmt-KO mice were administered with EPI or vehicle. Catecholamines were quantified by HPLC-ED. Nr4a1, Nr4a2, and Nr4a3 mRNA expression were evaluated by real-time PCR in hippocampus samples. It was observed an increase in EPI and freezing behavior, and a decrease in open arm entries in the elevated plus-maze test and time spent in the light in the light-dark test in WT mice in the PTSD-induction group compared to control. After induction of PTSD, Pnmt-KO mice showed a decrease in freezing, as well as an increase in open arm entries and transitions between compartments compared to WT. After PTSD induction, Pnmt-KO mice administered with EPI showed an increase in freezing compared with the vehicle. On day 0 of PTSD induction, it was observed an increase in mRNA expression of Nr4a2 and Nr4a3 genes in the hippocampus of WT mice compared to control, contrary to Pnmt-KO mice. In conclusion, our data suggest that EPI may be involved in the persistence of traumatic memories in PTSD, possibly through enhancement of the expression of Nr4a2 and Nr4a3 genes in the hippocampus. Peripheral administration of EPI restored contextual traumatic memories in Pnmt-KO mice, which suggests a causal role for EPI. The persistence of contextual traumatic memories may contribute to anxiety-like behavior and resistance of traumatic memory extinction in this PTSD mice model.
journal_name
Front Mol Neuroscijournal_title
Frontiers in molecular neuroscienceauthors
Martinho R,Oliveira A,Correia G,Marques M,Seixas R,Serrão P,Moreira-Rodrigues Mdoi
10.3389/fnmol.2020.588802subject
Has Abstractpub_date
2020-10-26 00:00:00pages
588802issn
1662-5099journal_volume
13pub_type
杂志文章abstract::Spinal cord injury (SCI) can result in an irreversible disability due to loss of sensorimotor function below the lesion. Presently, clinical treatments for SCI mainly include surgery, drugs and postoperative rehabilitation. The prospective roles of bioscaffolds and exosomes in several neurological diseases have been r...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00081
更新日期:2019-04-12 00:00:00
abstract::In the last decade, bioinformatic analyses of high-throughput proteomics and transcriptomics data have enabled researchers to gain insight into the molecular networks that may underlie lasting changes in synaptic efficacy. Development and utilization of these techniques have advanced the field of learning and memory s...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2017.00045
更新日期:2017-02-24 00:00:00
abstract::Hoxa5 is a member of the Hox gene family that plays critical roles in successive steps of the central nervous system formation during embryonic and fetal development. In the mouse, Hoxa5 was recently shown to be expressed in the medulla oblongata and the pons from fetal stages to adulthood. In these territories, Hoxa5...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00369
更新日期:2017-11-15 00:00:00
abstract::The degeneration of dopaminergic neurons during Parkinson's disease (PD) is intimately linked to malfunction of α-synuclein (αSyn), the main component of the proteinaceous intracellular inclusions characteristic for this pathology. The cytotoxicity of αSyn has been attributed to disturbances in several biological proc...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00207
更新日期:2017-06-30 00:00:00
abstract::The porcine brain closely resembles the human brain in aspects such as development and morphology. Temporal miRNA profiling in the developing embryonic porcine cortex revealed a distinct set of miRNAs, including miR-34c and miR-204, which exhibited a highly specific expression profile across the time of cortical foldi...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00031
更新日期:2017-02-09 00:00:00
abstract::Neurodevelopmental disorders (NDDs) are characterized by a wide range of symptoms including delayed speech, intellectual disability, motor dysfunction, social deficits, breathing problems, structural abnormalities, and epilepsy. Unfortunately, current treatment strategies are limited and innovative new approaches are ...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2018.00387
更新日期:2018-10-23 00:00:00
abstract::The basic helix-loop-helix (bHLH) protein family has previously been shown to be involved in the development of mesodiencephalic dopaminergic (mdDA) neurons in the murine midbrain. Specifically, Ngn2 and Mash1 are known to have a role in the specification of neural progenitors in the ventricular zone (VZ) of the midbr...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00353
更新日期:2017-11-01 00:00:00
abstract::Mecp2 is a DNA methylation reader that plays a critical role in experience-dependent plasticity. Increasing evidence supports a role for epigenetic modifications in activity-induced gene expression. Hence, candidate genes related to such phenomena are of great interest. Ryanodine receptors are intracellular calcium ch...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00188
更新日期:2017-06-13 00:00:00
abstract::Kainate (KA) is a potent neurotoxin that has been widely used experimentally to induce acute brain seizures and, after repetitive treatments, as a chronic model of temporal lobe epilepsy (TLE), with similar features to those observed in human patients with TLE. However, whether KA activates KA receptors (KARs) as an a...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2018.00217
更新日期:2018-06-22 00:00:00
abstract::Neurodegenerative diseases such as Parkinson's disease (PD), Alzheimer's disease (AD), amyotrophic lateral sclerosis (ALS), and spinal muscular atrophy (SMA) are chronic, progressive, and age-associated neurological disorders characterized by neuronal deterioration in specific brain regions. Although the specific path...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2019.00141
更新日期:2019-06-05 00:00:00
abstract::Neurolipids are a class of bioactive lipids that are produced locally through specific biosynthetic pathways in response to extracellular stimuli. Neurolipids are important endogenous regulators of neural cell proliferation, differentiation, oxidative stress, inflammation and apoptosis. Endocannabinoids (eCBs) and lys...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00223
更新日期:2019-09-19 00:00:00
abstract::Glioblastoma (GBM) is the most aggressive primary intracranial tumor of adults and confers a poor prognosis due to high vascularization. Hence anti-angiogenic therapy has become a promising strategy for GBM treatment. In this study, the transcription factor nuclear factor of activated T-cells 5 (NFAT5) was significant...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00301
更新日期:2017-09-21 00:00:00
abstract::Non-invasive molecular imaging techniques can enhance diagnosis to achieve successful treatment, as well as reveal underlying pathogenic mechanisms in disorders such as multiple sclerosis (MS). The cooperation of advanced multimodal imaging techniques and increased knowledge of the MS disease mechanism allows both mon...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2016.00085
更新日期:2016-09-15 00:00:00
abstract::Microglia are the innate sentinels of the central nervous system (CNS) and are responsible for the homeostasis and immune defense of the CNS. Under the influence of the local environment and cell-cell interaction, microglia exhibit a multidimensional and context-dependent phenotypes that can be cytotoxic and neuroprot...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2018.00158
更新日期:2018-05-14 00:00:00
abstract::Lithium has long been used for the treatment of psychiatric disorders, due to its robust beneficial effect as a mood stabilizing drug. Lithium's effectiveness for improving neurological function is therefore well-described, stimulating the investigation of its potential use in several neurodegenerative conditions incl...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2018.00297
更新日期:2018-08-28 00:00:00
abstract::Being the most common cause of dementia, AD is a polygenic and neurodegenerative disease. Complex and multiple factors have been shown to be involved in its pathogenesis, of which the genetics play an indispensable role. It is widely accepted that discovery of potential genes related to the pathogenesis of AD would be...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2017.00319
更新日期:2017-10-06 00:00:00
abstract::Microglia plays a critical role in neuroinflammation after ischemic stroke by releasing diverse inflammatory cytokines. Long non-coding RNA taurine up-regulated gene 1 (lncRNA TUG1) is widely expressed in adult brain and has been reported to participate in multiple biological processes associated with nervous system d...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00215
更新日期:2019-09-10 00:00:00
abstract::It has been 200 years since Parkinson's disease (PD) was first described, yet many aspects of its etiopathogenesis remain unclear. PD is a progressive and complex neurodegenerative disorder caused by genetic and environmental factors including aging, nutrition, pesticides and exposure to heavy metals. DNA methylation ...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2017.00225
更新日期:2017-07-18 00:00:00
abstract::Aim: Traumatic brain injury (TBI) is a leading cause of mortality/morbidity and is associated with chronic neuroinflammation. Melanocortin receptor agonists including adrenocorticotropic hormone (ACTH) ameliorate inflammation and provide a novel therapeutic approach. We examined the effect of long-acting cosyntropin (...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2020.00109
更新日期:2020-06-26 00:00:00
abstract::The neuromuscular junction (NMJ) is the chemical synapse connecting motor neurons and skeletal muscle fibers. NMJs allow all voluntary movements, and ensure vital functions like breathing. Changes in the structure and function of NMJs are hallmarks of numerous pathological conditions that affect muscle function includ...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2020.00162
更新日期:2020-08-28 00:00:00
abstract::Growth of postmitotic neurons occurs during different stages of development, including metamorphosis, and may also be part of neuronal plasticity and regeneration. Recently we showed that growth of post-mitotic neuroendocrine cells expressing the basic helix loop helix (bHLH) transcription factor Dimmed (Dimm) in Dros...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2016.00097
更新日期:2016-10-13 00:00:00
abstract::Mitochondrial dysfunction is a prominent trait of cellular decline during aging and intimately linked to neuronal degeneration during Parkinson's disease (PD). Various proteins associated with PD have been shown to differentially impact mitochondrial dynamics, quality control and function, including the leucine-rich r...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2018.00205
更新日期:2018-06-21 00:00:00
abstract::Membrane fusion is one of the most fundamental physiological processes in eukaryotes for triggering the fusion of lipid and content, as well as the neurotransmission. However, the architecture features of neurotransmitter release machinery and interdependent mechanism of synaptic membrane fusion have not been extensiv...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2017.00168
更新日期:2017-06-07 00:00:00
abstract::Time-Place learning (TPL) refers to the ability of animals to remember important events that vary in both time and place. This ability is thought to be functional to optimize resource localization and predator avoidance in a circadian changing environment. Various studies have indicated that animals use their circadia...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2013.00008
更新日期:2013-04-11 00:00:00
abstract::Among all organs of an adult animal, the central nervous system stands out because of its vast complexity and morphological diversity. During early development, the entire central nervous system develops from an apparently homogenous group of progenitors that differentiate into all neural cell types. Therefore, unders...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2019.00140
更新日期:2019-05-31 00:00:00
abstract::Neuroendocrine cells store and secrete bulk amounts of neuropeptides, and display morphological and molecular characteristics distinct from neurons signaling with classical neurotransmitters. In Drosophila the transcription factor Dimmed (Dimm), is a prime organizer of neuroendocrine capacity in a majority of the pept...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00260
更新日期:2017-08-14 00:00:00
abstract::Inhibition of nerve growth and plasticity in the CNS is to a large part mediated by Nogo-like signaling, now encompassing a plethora of ligands, receptors, co-receptors and modulators. Here we describe the distribution and levels of mRNA encoding 11 key genes involved in Nogo-like signaling (Nogo-A, Oligodendrocyte-My...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2017.00094
更新日期:2017-04-11 00:00:00
abstract::SYNGAP1, a Synaptic Ras-GTPase activating protein, regulates synapse maturation during a critical developmental window. Heterozygous mutation in SYNGAP1 (SYNGAP1-/+) has been shown to cause Intellectual Disability (ID) in children. Recent studies have provided evidence for altered neuronal protein synthesis in a mouse...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00097
更新日期:2019-05-09 00:00:00
abstract::Age-progressive neurodegenerative pathologies, including Alzheimer's disease (AD), are distinguished and diagnosed by disease-specific components of intra- or extra-cellular aggregates. Increasing evidence suggests that neuroinflammation promotes protein aggregation, and is involved in the etiology of neurological dis...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章
doi:10.3389/fnmol.2019.00310
更新日期:2019-12-12 00:00:00
abstract::Thiol groups can undergo numerous modifications, making cysteine a unique molecular switch. Cysteine plays structural and regulatory roles as part of proteins or glutathione, contributing to maintain redox homeostasis and regulate signaling within and amongst cells. Not surprisingly therefore, cysteines are associated...
journal_title:Frontiers in molecular neuroscience
pub_type: 杂志文章,评审
doi:10.3389/fnmol.2017.00167
更新日期:2017-06-06 00:00:00