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Dissociative disorders

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https://www.readbyqxmd.com/read/29778276/dissociable-frontostriatal-connectivity-mechanism-and-predictor-of-the-clinical-efficacy-of-capsulotomy-in-obsessive-compulsive-disorder
#1
Dazhi Yin, ChenCheng Zhang, Qiming Lv, Xiaoyu Chen, Kristina Zeljic, Hengfen Gong, Shikun Zhan, Haiyan Jin, Zheng Wang, Bomin Sun
BACKGROUND: Little is known about the neural mechanism and response variability underlying neurosurgical interventions for intractable obsessive-compulsive disorder (OCD). METHODS: Of 81 OCD patients screened for capsulotomy identified in our institutional database, 36 patients with clinical assessment before and after capsulotomy and imaging data (9 of 36 patients without postoperative imaging data used as an independent test group), and 29 healthy control subjects were retrospectively recruited...
April 22, 2018: Biological Psychiatry
https://www.readbyqxmd.com/read/29777197/the-transition-state-structure-for-binding-between-taz1-of-cbp-and-the-disordered-hif-1%C3%AE-cad
#2
Ida Lindström, Eva Andersson, Jakob Dogan
Intrinsically disordered proteins (IDPs) are common in eukaryotes. However, relatively few experimental studies have addressed the nature of the rate-limiting transition state for the coupled binding and folding reactions involving IDPs. By using site-directed mutagenesis in combination with kinetics measurements we have here characterized the transition state for binding between the globular TAZ1 domain of CREB binding protein and the intrinsically disordered C-terminal activation domain of Hif-1α (Hif-1α CAD)...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29765311/altered-sense-of-body-ownership-and-agency-in-posttraumatic-stress-disorder-and-its-dissociative-subtype-a-rubber-hand-illusion-study
#3
Daniela Rabellino, Dalila Burin, Sherain Harricharan, Chantelle Lloyd, Paul A Frewen, Margaret C McKinnon, Ruth A Lanius
Traumatic experiences have been linked to the development of altered states of consciousness affecting bodily perception, including alterations in body ownership and in sense of agency, the conscious experience of the body as one's own and under voluntary control. Severe psychological trauma and prolonged distress may lead to posttraumatic stress disorder (PTSD). Together, symptoms of derealization and, related specifically to the sense of body ownership and agency, of depersonalization (where parts of the body or the entire body itself is perceived as detached and out of control), constitute the dissociative subtype (PTSD+DS)...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29758285/filaggrin-2-deficiency-results-in-abnormal-cell-cell-adhesion-in-the-cornified-cell-layers-and-causes-peeling-skin-syndrome-type-a
#4
Janan Mohamad, Ofer Sarig, Lisa M Godsel, Alon Peled, Natalia Malchin, Ron Bochner, Dan Vodo, Tom Rabinowitz, Mor Pavlovsky, Shahar Taiber, Maya Fried, Marina Eskin-Schwartz, Siwar Assi, Noam Shomron, Jouni Uitto, Jennifer L Koetsier, Reuven Bergman, Kathleen J Green, Eli Sprecher
Peeling skin syndromes form a large and heterogeneous group of inherited disorders characterized by superficial detachment of the epidermal cornified cell layers, often associated with inflammatory features. Here we report on a consanguineous family featuring non-inflammatory peeling of the skin exacerbated by exposure to heat and mechanical stress. Whole exome sequencing revealed a homozygous nonsense mutation in FLG2, encoding filaggrin 2, which co-segregated with the disease phenotype in the family. The mutation was found to result in decreased FLG2 RNA levels as well almost total absence of filaggrin 2 in the patient epidermis...
May 11, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29753795/non-anesthetic-effects-of-ketamine-a-review-article-authors-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2-%C3%A2
#5
REVIEW
Jabril Eldufani, Alireza Nekoui, Gilbert Blaise
Ketamine is considered a dissociative anesthetic medication, and it is a commonly administered by a parenteral route. It works mainly by blocking the N-methyl-D-aspartate (NMDA) receptor. It inhibits the voltage-gated Na_ and K_ channels and serotonin and dopamine re-uptake; also, it affects specific receptors, such as α-amino-3-hydroxy-5-methyl-4- isoxazolepropionic acid (AMPA), kainate and aminobutyric acid A receptors. Ketamine appears to have particular mechanisms that are potentially involved during analgesic induction, including enhancing of descending inhibition and anti-inflammatory effects...
May 10, 2018: American Journal of Medicine
https://www.readbyqxmd.com/read/29744897/musical-and-verbal-short-term-memory-insights-from-neurodevelopmental-and-neurological-disorders
#6
REVIEW
Anne Caclin, Barbara Tillmann
Auditory short-term memory (STM) is a fundamental ability to make sense of auditory information as it unfolds over time. Whether separate STM systems exist for different types of auditory information (music and speech, in particular) is a matter of debate. The present paper reviews studies that have investigated both musical and verbal STM in healthy individuals and in participants with neurodevelopmental and neurological disorders. Overall, the results are in favor of only partly shared networks for musical and verbal STM...
May 9, 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29743626/role-of-igf-1r-in-ameliorating-apoptosis-of-gne-deficient-cells
#7
Reema Singh, Priyanka Chaudhary, Ranjana Arya
Sialic acids (SAs) are nine carbon acidic amino sugars, found at the outermost termini of glycoconjugates performing various physiological and pathological functions. SA synthesis is regulated by UDP-GlcNAc 2-epimerase/ManNAc kinase (GNE) that catalyzes rate limiting steps. Mutations in GNE result in rare genetic disorders, GNE myopathy and Sialuria. Recent studies indicate an alternate role of GNE in cell apoptosis and adhesion, besides SA biosynthesis. In the present study, using a HEK cell-based model for GNE myopathy, the role of Insulin-like Growth Factor Receptor (IGF-1R) as cell survival receptor protein was studied to counter the apoptotic effect of non-functional GNE...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29742812/binding-of-free-and-immune-complex-associated-hepatitis-c-virus-to-erythrocytes-is-mediated-by-the-complement-system
#8
Kazi Abdus Salam, Richard Y Wang, Teresa Grandinetti, Valeria De Giorgi, Harvey J Alter, Robert D Allison
Erythrocytes bind circulating immune complexes (IC) and facilitate IC clearance from the circulation. Chronic hepatitis C virus (HCV) infection is associated with IC-related disorders. In this study we investigated the kinetics and mechanism of HCV and HCV-IC binding to and dissociation from erythrocytes. Cell culture-produced HCV was mixed with erythrocytes from healthy blood donors and erythrocyte-associated virus particles were quantified. Purified complement proteins, complement-depleted serum, and complement receptor antibodies were used to investigate complement-mediated HCV-erythrocyte binding...
May 9, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29739129/evaluation-of-relationship-between-obsessive-compulsive-disorder-and-dissociative-experiences
#9
Mustafa Tatlı, Ozlem Cetinkaya, Fulya Maner
Objective: The aim of the study is to evaluate the relationship between obsessive-compulsive disorder (OCD) symptoms and dissociative experiences and the effect of childhood traumatic experiences on this relationship in OCD patients. Methods: Fifty consecutive OCD patients and 50 healthy controls are enrolled for this study. Sociodemographic and Clinical Data Form, Dissociative Experiences Scale (DES), Padua Inventory (PI) and Childhood Trauma Questionnaire (CTQ) are applied to participants...
May 31, 2018: Clinical Psychopharmacology and Neuroscience: the Official Scientific Journal of the Korean College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29737565/pain-processing-in-functional-and-idiopathic-dystonia-an-exploratory-study
#10
Francesca Morgante, Angela Matinella, Elisa Andrenelli, Lucia Ricciardi, Cosimo Allegra, Carmen Terranova, Paolo Girlanda, Michele Tinazzi
BACKGROUND: Pain is often experienced by patients with functional dystonia and idiopathic cervical dystonia and is likely to be determined by different neural mechanisms. OBJECTIVE: In this exploratory study, we tested the sensory-discriminative and cognitive-emotional component of pain in patients with functional and idiopathic dystonia. METHODS: Ten patients with idiopathic cervical dystonia, 12 patients with functional dystonia, and 16 age- and sex-matched healthy controls underwent psychophysical testing of tactile and pain thresholds and pain tolerance...
May 8, 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29736744/antidepressant-efficacy-and-tolerability-of-ketamine-and-esketamine-a-critical-review
#11
REVIEW
P Molero, J A Ramos-Quiroga, R Martin-Santos, E Calvo-Sánchez, L Gutiérrez-Rojas, J J Meana
Ketamine and its enantiomer S-ketamine (esketamine) are promising candidates to produce a rapid-onset antidepressant effect in treatment-resistant depression. Ketamine causes continued blockade of the glutamate N-methyl-D-aspartate (NMDA) receptor, though this might not primarily mediate the antidepressant effect. Alternative hypotheses include selectivity for the NMDA receptor subtype containing the NMDA receptor subunit 2B (NR2B), inhibition of the phosphorylation of the eukaryotic elongation factor 2 (eEF2) kinase, increased expression of brain-derived neurotrophic factor (BDNF) and tropomyosin receptor kinase B (TrKB), and activation of the mammalian target of rapamycin (mTOR) signaling pathway, alongside other independent actions attributed to the ketamine metabolism to R-hydroxynorketamine (R-HNK)...
May 7, 2018: CNS Drugs
https://www.readbyqxmd.com/read/29736136/a-case-of-dissociative-seizures-presented-like-myoclonic-epilepsy
#12
Balaswamy Reddy, Soumitra DAS, Mustafa Ali, Srinivas Guruprasad
Psychogenic seizures are often underdiagnosed and epilepsy is very often over-treated which leads to multiple financial, social and stigma related difficulties. The myoclonic seizure itself is a rare phenomenon and when functional movement disorder presents like myoclonus then it's extremely difficult to pinpoint the exact cause. Here, we are presenting a case who was misdiagnosed as having a myoclonic seizure disorder and treated in multiple places without any improvement which ultimately turned out to be functional movement disorder of a rare variety...
April 25, 2018: Shanghai Archives of Psychiatry
https://www.readbyqxmd.com/read/29734991/violent-parasomnia-with-recurrent-biting-and-surgical-interventions-case-report-and-differential-diagnosis
#13
Nilam Danish, Imran S Khawaja, Carlos H Schenck
A case is reported of recurrent, injurious self-biting during sleep, requiring surgical interventions, in a 55-year-old obese man with a 20-year history of violent complex parasomnia, with greatly increased frequency and severity of episodes induced by work stress during the preceding 3 years. After clinical evaluation and overnight, hospital-based video-polysomnography, the cause of the chronic injurious parasomnia was deemed to be a non-rapid eye movement (NREM) sleep parasomnia comorbid with severe obstructive sleep apnea...
April 30, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29727175/interaction-of-huntingtin-exon-1-peptides-with-lipid-based-micellar-nanoparticles-probed-by-solution-nmr-and-q-band-pulsed-epr
#14
Alberto Ceccon, Thomas Schmidt, Vitali Tugarinov, Samuel A Kotler, Charles D Schwieters, G Marius Clore
Lipid-based micellar nanoparticles promote aggregation of huntingtin exon-1 peptides. Here we characterize the interaction of two such peptides, httNTQ7 and httNTQ10 comprising the N-terminal amphiphilic domain of huntingtin followed by 7 and 10 glutamine repeats, respectively, with 8 nm lipid micelles using NMR chemical exchange saturation transfer (CEST), circular dichroism and pulsed Q-band EPR. Exchange between free and micelle-bound httNTQn peptides occurs on the millisecond time scale with a KD ~ 0.5-1 mM...
May 4, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29727073/efficacy-safety-and-durability-of-repeated-ketamine-infusions-for-comorbid-posttraumatic-stress-disorder-and-treatment-resistant-depression
#15
C Sophia Albott, Kelvin O Lim, Miriam K Forbes, Christopher Erbes, Susanna J Tye, John G Grabowski, Paul Thuras, Tegan M Batres-Y-Carr, Joseph Wels, Paulo R Shiroma
OBJECTIVE: The present study examined the efficacy, safety, and durability of repeated ketamine infusions for the treatment of comorbid posttraumatic stress disorder (PTSD) and treatment-resistant depression (TRD) in a sample of veterans. METHODS: Individuals with comorbid DSM-5-defined PTSD and DSM-IV-defined major depressive disorder (N = 15) received 6 intravenous ketamine infusions (0.5 mg/kg) on a Monday-Wednesday-Friday schedule over a 12-day period from May 2015 to June 2016...
May 1, 2018: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/29716228/reaxff-molecular-dynamics-simulation-of-intermolecular-structure-formation-in-acetic-acid-water-mixtures-at-elevated-temperatures-and-pressures
#16
Mert Y Sengul, Clive A Randall, Adri C T van Duin
The intermolecular structure formation in liquid and supercritical acetic acid-water mixtures was investigated using ReaxFF-based molecular dynamics simulations. The microscopic structures of acetic acid-water mixtures with different acetic acid mole fractions (1.0 ≥ xHAc ≥ 0.2) at ambient and critical conditions were examined. The potential energy surface associated with the dissociation of acetic acid molecules was calculated using a metadynamics procedure to optimize the dissociation energy of ReaxFF potential...
April 28, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29709541/the-physiological-orienting-response-in-female-adolescents-with-borderline-personality-disorder
#17
Julian Koenig, Romuald Brunner, Peter Parzer, Franz Resch, Michael Kaess
BACKGROUND: The reflexive startle- and orienting-response have been widely studied in psychiatric disorders. Existing evidence in patients with borderline personality disorder (BPD) is mixed, and limited to adults. The present study addressed clinical correlates of the psychophysiological orienting response in adolescents with BPD. METHODS: Female adolescents (13-19 years) with BPD (n = 30), healthy controls (HC; n = 34), and psychiatric clinical controls (CC; n = 53) participated in the trial...
April 27, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29707166/pre-deployment-dissociation-and-personality-as-risk-factors-for-post-deployment-post-traumatic-stress-disorder-in-danish-soldiers-deployed-to-afghanistan
#18
Beatriz Ponce de León, Søren Andersen, Karen-Inge Karstoft, Ask Elklit
Objective : This study investigated whether pre-deployment dissociation was associated with previously identified post-traumatic stress disorder (PTSD) symptom trajectories from before to 2.5 years after military deployment. Furthermore, it examined whether the tendency to dissociate, pre-deployment personality factors, conceptualized by the Big Five model, and previous trauma represented independent risk factors for post-deployment PTSD symptoms. Method : This prospective study included the entire team of 743 soldiers from the Danish Contingent of the International Security Assistance Force 7 deployed to Afghanistan in 2009...
2018: European Journal of Psychotraumatology
https://www.readbyqxmd.com/read/29706967/role-of-c-reactive-protein-at-sites-of-inflammation-and-infection
#19
REVIEW
Nicola R Sproston, Jason J Ashworth
C-reactive protein (CRP) is an acute inflammatory protein that increases up to 1,000-fold at sites of infection or inflammation. CRP is produced as a homopentameric protein, termed native CRP (nCRP), which can irreversibly dissociate at sites of inflammation and infection into five separate monomers, termed monomeric CRP (mCRP). CRP is synthesized primarily in liver hepatocytes but also by smooth muscle cells, macrophages, endothelial cells, lymphocytes, and adipocytes. Evidence suggests that estrogen in the form of hormone replacement therapy influences CRP levels in the elderly...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29702410/scared-or-scarred-could-dissociogenic-lesions-predispose-to-nonepileptic-seizures-after-head-trauma
#20
REVIEW
Stoyan Popkirov, Alan J Carson, Jon Stone
A history of head injury is common in patients with psychogenic nonepileptic seizures (PNES). This association has so far been interpreted as either spurious or psychologically mediated. Biased recall and misattribution could foster illness beliefs about brain damage that promote symptom production. Furthermore, the emotional impact of head injury could induce long-term changes in stress responsivity. Lastly, maladaptive cognitive-behavioural processes involving symptom modelling and aversive conditioning, known to play a role in functional neurological disorders, could contribute to the development of PNES after head trauma...
April 14, 2018: Seizure: the Journal of the British Epilepsy Association
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