rudyvdbrink/CitationDatabase huggingface dataset:
Targeting the mitochondrial permeability transition pore in traumatic central nervous system injury.
Neural regeneration research, 2018

The mitochondrion serves many functions in the central nervous system (CNS) and other organs beyond the well-recognized role of adenosine triphosphate (ATP) production. This includes calcium-dependent cell signaling, regulation of gene expression, synthesis and release of cytotoxic reactive oxygen species, and the release of cytochrome c and other apoptotic cell death factors. Traumatic injury to the CNS results in a rapid and, in some cases, sustained loss of mitochondrial function. One consequence of compromised mitochondrial function is induction of the mitochondrial permeability transition (mPT) state due to formation of the cyclosporine A sensitive permeability transition pore (mPTP). In this mini-review, we summarize evidence supporting the involvement of the mPTP as a mediator of mitochondrial and cellular demise following CNS traumatic injury and discuss the beneficial effects and limitations of the current ex-perimental strategies targeting the mPTP.
At-a-glance - The local response to the Canadian opioid epidemic in the Kingston, Frontenac, and Lennox and Addington communities.
Health promotion and chronic disease prevention in Canada : research, policy and practice, 2019

Canada is facing a national opioid overdose epidemic, with deaths due to opioid overdoses continuing to rise dramatically. To that end, the opioid experiences of the Kingston, Frontenac, and Lennox and Addington communities, the regional hub for southeastern Ontario and the home of Queen's University, may provide meaningful insights. This article provides a description of recent activities to address the local opioid crisis, a rationale for their adoption and the context in which they are being undertaken.
[Transneuronal tracing using neurotropic viruses in the mammals].
Virologie (Montrouge, France), 2006

For fifteen years, the knowledge of the organization of neuronal networks inside the central nervous system of mammals has been considerably enhanced with the use of neurotropic viruses as tracers. Those viruses, pseudorabies, herpes simplex type 1 and rabies propagate in the brain through chains of connected neurons. This means that the transfer from a neuron to another one occurs only at the synaptic level. Each strain of virus has its own specificities which are used to study neuronal networks of different nature. Thus, the Bartha strain of pseudorabies, mostly used for tracing studies in rodents, has been very useful to characterize the networks belonging to the autonomic nervous system following peripheral inoculation. Less employed, rabies virus has been mainly used for the characterization of motor networks and, recently, to map neuronal networks in the cortex of primates after stereotaxic injections. On the other hand, the injection at distinct sites of recombinant pseudorabies viruses expressing different exogenous genes allows the study of interactions between two networks. This revue presents the milestones of the development of the transneuronal tracing using neurotropic viruses and emphasizes what virology and neurosciences bring to each other thanks to this technique.
Publisher Correction: AMP kinase promotes glioblastoma bioenergetics and tumour growth.
Nature cell biology, 2018

In the version of this Article originally published, the competing interests statement was missing. The authors declare no competing interests; this statement has now been added in all online versions of the Article.
Motoneurone synchronization for intercostal and abdominal muscles: interneurone influences in two different species.
Experimental brain research, 2021

The contribution of branched-axon monosynaptic inputs in the generation of short-term synchronization of motoneurones remains uncertain. Here, synchronization was measured for intercostal and abdominal motoneurones supplying the lower thorax and upper abdomen, mostly showing expiratory discharges. Synchronization in the anaesthetized cat, where the motoneurones receive a strong direct descending drive, is compared with that in anaesthetized or decerebrate rats, where the direct descending drive is much weaker. In the cat, some examples could be explained by branched-axon monosynaptic inputs, but many others could not, by virtue of peaks in cross-correlation histograms whose widths (relatively wide) and timing indicated common inputs with more complex linkages, e.g., disynaptic excitatory. In contrast, in the rat, correlations for pairs of internal intercostal nerves were dominated by very narrow peaks, indicative of branched-axon monosynaptic inputs. However, the presence of activity in both inspiration and expiration in many of the nerves allowed additional synchronization measurements between internal and external intercostal nerves. Time courses of synchronization for these often consisted of combinations of peaks and troughs, which have never been previously described for motoneurone synchronization and which we interpret as indicating combinations of inputs, excitation of one group of motoneurones being common with either excitation or inhibition of the other. Significant species differences in the circuits controlling the motoneurones are indicated, but in both cases, the roles of spinal interneurones are emphasised. The results demonstrate the potential of motoneurone synchronization for investigating inhibition and have important general implications for the interpretation of neural connectivity measurements by cross-correlation.
Hypnotic prescription by GPs is associated with their personal drug consumption but not by their insomnia status.
Journal of sleep research, 2020

French general practitioners (GPs) are known to widely prescribe medications to treat insomnia despite their negative effects. GPs' easy access to self-medication may affect their mental representation of sleep and hypnotics, and subsequently their professional behaviour. Our aim was to examine the association between GPs' personal hypnotic drug consumption habits and their management of patients with sleep disturbances. A randomized sample of Alsatian GPs participated in a survey based on questionnaires including the Pittsburgh Sleep Quality Index, the Dysfunctional Beliefs About Sleep in 10 questions to characterize sleep, and an evaluation of their management strategies regarding sleep for both patients and themselves. Two-hundred and forty-nine GPs were included (response rate of 51%). Demographics of the GPs' samples were representative of those of the Alsatian GP population. Fifteen percent of the survey respondents met insomnia criteria. For the management of their own sleep disturbances, 14.3% of GPs were taking hypnotic drugs and 8.7% were taking anxiolytics, with greater drug consumption in the insomnia group. In a multivariate analysis, GPs who personally consumed these medications prescribed significantly more of them to patients, whereas their insomnia status had less impact. Other factors such as gender and type of practice were not associated with a higher prescription rate. Our results indicate that GPs' personal drug consumption can have a significant impact on the management of their patients, therefore suggesting that actions towards GPs' health improvement may also benefit their patients and the public.
Cognitive Conflict in Borderline Personality Disorder: A Study Protocol.
Behavioral sciences (Basel, Switzerland), 2020

Borderline personality disorder (BPD) represents a severe mental condition that is usually characterized by distressing identity disturbances. Although most prevailing explanatory models and psychotherapy approaches consider and intervene on self-concept, they seem not to recognize or explore idiosyncratic cognitive conflicts that patients may experience. These conflicts, which have been conceptualized as "implicative dilemmas" and "dilemmatic constructs" by personal construct theorists, could be considered as key elements of the explanatory model for BPD to provide a better understanding of this disorder and possibly enhance the effectiveness of contemporary psychotherapeutic approaches. The current study (Identifier: NCT04498104) aims to examine the characteristics of the interpersonal cognitive system of a group of patients diagnosed with BPD, using the repertory grid technique, and to compare them with those of a community sample. We will test if BPD participants are more affected by cognitive conflicts than controls. Additionally, we will gauge the association between cognitive conflicts and symptom severity as well as their predictive capacity of treatment outcome. The obtained results will be a necessary step to determine if cognitive conflicts have a substantial role on the explanation of BPD. It could also help to consider the development of a conflict resolution intervention module for this disorder.
In vivo real-time dynamics of ATP and ROS production in axonal mitochondria show decoupling in mouse models of peripheral neuropathies.
Acta neuropathologica communications, 2019

Mitochondria are critical for the function and maintenance of myelinated axons notably through Adenosine triphosphate (ATP) production. A direct by-product of this ATP production is reactive oxygen species (ROS), which are highly deleterious for neurons. While ATP shortage and ROS levels increase are involved in several neurodegenerative diseases, it is still unclear whether the real-time dynamics of both ATP and ROS production in axonal mitochondria are altered by axonal or demyelinating neuropathies. To answer this question, we imaged and quantified mitochondrial ATP and hydrogen peroxide (H
Interesting sign of Bell's palsy in an ear wiggler.
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology, 2009

Bell's palsy is a common disorder involving facial nerve. Branches of the facial nerve innervating auriculares muscles could be involved in patients with Bell's palsy. Functions of auriculares muscles were degenerated in the most of human beings, therefore, paralysis of the auriculares muscles in patients with Bell's palsy may be unnoticeable. However, unilateral loss of ear wiggling may be an interesting sign of Bell's palsy in natural ear wigglers who can move their ears voluntarily. The mechanism and muscles responsible for the ear wiggling and the innervations to these muscles were illustrated.
Implantation of a Cranial Window for Repeated In Vivo Imaging in Awake Mice.
Journal of visualized experiments : JoVE, 2021

To fully understand the cellular physiology of neurons and glia in behaving animals, it is necessary to visualize their morphology and record their activity in vivo in behaving mice. This paper describes a method for the implantation of a chronic cranial window to allow for the longitudinal imaging of brain cells in awake, head-restrained mice. In combination with genetic strategies and viral injections, it is possible to label specific cells and regions of interest with structural or physiological markers. This protocol demonstrates how to combine viral injections to label neurons in the vicinity of GCaMP6-expressing astrocytes in the cortex for simultaneous imaging of both cells through a cranial window. Multiphoton imaging of the same cells can be performed for days, weeks, or months in awake, behaving animals. This approach provides researchers with a method for viewing cellular dynamics in real time and can be applied to answer a number of questions in neuroscience.
Mosaic trisomy of chromosome 1q in human brain tissue associates with unilateral polymicrogyria, very early-onset focal epilepsy, and severe developmental delay.
Acta neuropathologica, 2020

Polymicrogyria (PMG) is a developmental cortical malformation characterized by an excess of small and frustrane gyration and abnormal cortical lamination. PMG frequently associates with seizures. The molecular pathomechanisms underlying PMG development are not yet understood. About 40 genes have been associated with PMG, and small copy number variations have also been described in selected patients. We recently provided evidence that epilepsy-associated structural brain lesions can be classified based on genomic DNA methylation patterns. Here, we analyzed 26 PMG patients employing array-based DNA methylation profiling on formalin-fixed paraffin-embedded material. A series of 62 well-characterized non-PMG cortical malformations (focal cortical dysplasia type 2a/b and hemimegalencephaly), temporal lobe epilepsy, and non-epilepsy autopsy controls was used as reference cohort. Unsupervised dimensionality reduction and hierarchical cluster analysis of DNA methylation profiles showed that PMG formed a distinct DNA methylation class. Copy number profiling from DNA methylation data identified a uniform duplication spanning the entire long arm of chromosome 1 in 7 out of 26 PMG patients, which was verified by additional fluorescence in situ hybridization analysis. In respective cases, about 50% of nuclei in the center of the PMG lesion were 1q triploid. No chromosomal imbalance was seen in adjacent, architecturally normal-appearing tissue indicating mosaicism. Clinically, PMG 1q patients presented with a unilateral frontal or hemispheric PMG without hemimegalencephaly, a severe form of intractable epilepsy with seizure onset in the first months of life, and severe developmental delay. Our results show that PMG can be classified among other structural brain lesions according to their DNA methylation profile. One subset of PMG with distinct clinical features exhibits a duplication of chromosomal arm 1q.
Crossed Cerebellar Diaschisis in Patients With Symptomatic Unilateral Anterior Circulation Stroke Is Associated With Hemodynamic Impairment in the Ipsilateral MCA Territory.
Journal of magnetic resonance imaging : JMRI, 2021

In patients with steno-occlusive disease, recent findings suggest that hemodynamic alterations may also be associated with crossed cerebellar diaschisis (CCD) rather than a functional disruption alone.
How to be a graduate advisee.
Neuron, 2014

Successful graduate training benefits from committed mentors and motivated students. Because scientific research involves investigating unexplored territory, however, each student's experience will necessarily be unique, making it rarely possible to conform to an idealized training sequence. To approach this inherently uncontrolled situation constructively, students are encouraged, first, to become aware of their own learning patterns and to apply this knowledge to selecting a thesis laboratory, and second, to cultivate an educational philosophy that helps them adapt to many circumstances.
Retrospective multi-centre study on head adapters in partial revision hip arthroplasty.
Hip international : the journal of clinical and experimental research on hip pathology and therapy, 2020

Instability and dislocation after total hip arthroplasty (THA) is a common reason for revision surgery. THA head-neck adapters promise the reconstruction of optimal femoral offset and leg length in revision THA (rTHA) while retaining stable implants. The aim of this retrospective multi-centre study is to report on the results achieved with the use of head adapters in partial rTHA, to avoid the instability of the implant.
The NMJ as a model synapse: New perspectives on formation, synaptic transmission and maintenance: Acetylcholinesterase at the neuromuscular junction.
Neuroscience letters, 2020

Acetylcholinesterase (AChE) is an essential enzymatic component of the neuromuscular junction where it is responsible for terminating neurotransmission by the cholinergic motor neurons. The enzyme at the neuromuscular junction (NMJ) is contributed primarily by the skeletal muscle where it is produced at higher levels in the post-synaptic region of the fibers. The major form of AChE at the NMJ is a large asymmetric form consisting of three tetramers covalently attached to a three-stranded collagen-like tail which is responsible for anchoring it to the synaptic basal lamina. Its location and expression is regulated to a large extent by the motor neurons and occurs at the transcriptional, translational and post-translational levels. While its expression can be quite rapid in tissue cultured cells, its half-life in vivo appears to be quite long, about three weeks, although more rapidly turning over pools have been described. Finally the essential nature of this enzyme is underscored by the fact that no naturally occurring null mutations of the catalytic subunit have been described in higher organisms and the few dozen humans carrying mutations in the collagen tail responsible for anchoring the enzyme at the NMJ are severely affected.
Combining brain-computer interface and virtual reality for rehabilitation in neurological diseases: A narrative review.
Annals of physical and rehabilitation medicine, 2021

The traditional rehabilitation for neurological diseases lacks the active participation of patients, its process is monotonous and tedious, and the effects need to be improved. Therefore, a new type of rehabilitation technology with more active participation combining brain-computer interface (BCI) with virtual reality (VR) has developed rapidly in recent years and has been used in rehabilitation in neurological diseases.
Spinal muscular atrophy, John Griffin, and mentorship.
Journal of the peripheral nervous system : JPNS, 2012

Hereditary canine spinal muscular atrophy is an inherited motor neuron disease that occurs in Brittany Spaniels and has remarkable similarities with human spinal muscular atrophy. Both disorders are characterized by proximal limb and truncal muscle weakness of variable severity. Detailed pathological studies indicate that there is early dysfunction of motor neuron synapses, particularly the neuromuscular junction synapse, prior to motor neuron death. This period of synaptic dysfunction may define a critical window of opportunity for disease reversibility in motor neuron disease.
Management of Self-Injurious Behavior, Aggression, and Psychogenic Non-Epileptic Seizures in Patients With Tuberous Sclerosis: A Case Report With a Review of Literature.
Cureus, 2020

Tuberous sclerosis complex (TSC) is a neurocutaneous disorder that affects multiple systems. TSC encompasses neurobehavioral abnormalities that are considered less sensitive and specific to the disease. Autism spectrum disorder, attention deficit disorder, anxiety, mood disorders, and self-injurious behavior (SIB) are neurobehavioral manifestations associated with tuberous sclerosis. Among them, SIB is poorly described and studied. We present a case report and a brief review of the literature, which offers us insight into the pathological mechanism that explains associated SIB in TSC patients and provides a possible multidisciplinary approach to handle this complicated association. The case details a 21-year-old female with tuberous sclerosis who went to the emergency department and then transfer to the psychiatric floor due to aggressive behavior and SIB. The patient had a history of infantile spasm in childhood and generalized tonic-clonic seizures (GTCS); the last episode was four years ago at the age of 17. During the hospital admission, the patient developed an apparent tonic-clonic seizure. Nevertheless, the electroencephalogram (EEG) shows no epileptiform pattern and because of the clinical presentation, it was concluded she had psychogenic nonepileptic seizures (PNES). The patient's CT scan showed a stable appearance of multiple calcified subependymal nodules and left frontal hypodensity. Mini-mental examination (MMSE) revealed mild cognitive impairment. Patients with TSC/SIB have higher frequencies of mental retardation, TSC2 mutations, history of infantile spasms, spike focus in the left frontal lobe. Also, TSC/SIB patients have a higher frequency of tubers in quadrants other than the left posterior neuroanatomical region in left occipital, parietal, and posterior temporal lobes. Our patient had four out of five of the risks factor for developing TSC/SIB. Almost all patients with tuberous sclerosis are expected to develop seizures. Nevertheless, our patient was seizure-free for two years and managed prophylactically with antiepileptic medication. PNES can also occur in patients with tuberous sclerosis. It is essential to be attentive to differentiate PNES from actual seizures due to their history of the high frequency of seizures in TSC. Given the multiple systems involved in the symptomatology of TSC, including the SIB and neurological concerns, multidisciplinary treatment strategies must be implemented. Treatment of TSC with SIB should include antiepileptic drugs covering seizures and managing the SIB's mood component. A neuroleptic could be added for patients who are difficult to manage.
Model of theta frequency perturbations and contextual fear memory.
Hippocampus, 2021

Theta oscillations in the hippocampal local field potential (LFP) appear during translational movement and arousal, modulate the activity of principal cells, and are associated with spatial cognition and episodic memory function. All known anxiolytics slightly but consistently reduce hippocampal theta frequency. However, whether this electrophysiological effect is mechanistically related to the decreased behavioral expression of anxiety is currently unclear. Here, we propose that a reduction in theta frequency affects synaptic plasticity and mnemonic function and that this can explain the reduction in anxiety behavior. We test this hypothesis in a biophysical model of contextual fear conditioning. First, we confirm that our model reproduces previous empirical results regarding the dependence of synaptic plasticity on presynaptic firing rate. Next, we investigate how theta frequency during contextual conditioning impacts learning. These simulations demonstrate that learned associations between threat and context are attenuated when learning takes place under reduced theta frequency. Additionally, our simulations demonstrate that learned associations result in increased theta activity in the amygdala, consistent with empirical data. In summary, we propose a mechanism that can account for the behavioral effect of anxiolytics by impairing the integration of threat attributes of an environment into the cognitive map due to reduced synaptic potentiation.
The mystery of memory: in search of the past.
Annals of the New York Academy of Sciences, 2013

A universal fascination with how we remember, forget, and create false memories cuts across the arts and sciences, as do the questions of how and where memories are formed and preserved. Moderated by Steve Paulson, executive producer and host of To the Best of Our Knowledge, novelist and comparative literature professor André Aciman (City University of New York), neuroscientist Joseph LeDoux (New York University), psychologist Daniel Schacter (Harvard University), and historian of science and medicine Alison Winter (University of Chicago) discuss how memory impacts our perception of ourselves, the development of personality, and the ability to construct and reconstruct our past experience. The following is an edited transcript of the discussion that occurred November 14, 2012, 7:00-8:15 PM, at the New York Academy of Sciences in New York City.