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https://www.readbyqxmd.com/read/29325115/fast-sleep-spindle-density-is-associated-with-rs4680-val108-158met-genotype-of-catechol-o-methyltransferase-comt
#1
Claudia Schilling, Lena Gappa, Michael Schredl, Fabian Streit, Jens Treutlein, Josef Frank, Michael Deuschle, Andreas Meyer-Lindenberg, Marcella Rietschel, Stephanie H Witt
Study Objectives: Sleep spindles are a hallmark of NREM stage 2 sleep. Fast sleep spindles correlate with cognitive functioning, and are reduced in schizophrenia. Although spindles are highly genetically determined, distinct genetic mechanisms influencing sleep spindle activity have not been identified so far. Spindles are generated within a thalamo-cortical network. Dopaminergic neurotransmission modulates activity within this network and importantly depends on activity of catechol-O-methyltransferase (COMT)...
January 6, 2018: Sleep
https://www.readbyqxmd.com/read/29321233/effect-of-psychostimulants-on-blood-pressure-profile-and-endothelial-function-in-narcolepsy
#2
Adriana Bosco, Régis Lopez, Lucie Barateau, Sofiene Chenini, Carole Pesenti, Jean-Louis Pépin, Isabelle Jaussent, Yves Dauvilliers
OBJECTIVE: To assess the effect of psychostimulant treatments on the 24-hour blood pressure (BP) profile of patients with narcolepsy type 1 (NT1). METHODS: Heart rate (HR) and BP were monitored for 24 hours and morning endothelial function was evaluated in 160 consecutive patients with NT1: 68 untreated (41 male, median age 34.9 years), 54 treated (32 male, median age 40.9 years), and 38 evaluated twice (21 male, median age 32 years), before and during treatment...
January 10, 2018: Neurology
https://www.readbyqxmd.com/read/29289556/chronopathophysiological-implications-of-orexin-in-sleep-disturbances-and-lifestyle-related-disorders
#3
REVIEW
Hiroshi Tsuneki, Tsutomu Wada, Toshiyasu Sasaoka
Sleep, a mysterious behavior, has recently been recognized as a crucial factor for health and longevity. The daily sleep/wake cycle provides the basis of biorhythms controlling whole-body homeostasis and homeodynamics; therefore, disruption of sleep causes several physical and psychological disorders, including cardiovascular disease, obesity, diabetes, cancer, anxiety, depression, and cognitive dysfunction. However, the mechanism linking sleep disturbances and sleep-related disorders remains unknown. Orexin (also known as hypocretin) is a neuropeptide produced in the hypothalamus...
December 28, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29276000/a-standardized-test-to-document-cataplexy
#4
Stefano Vandi, Fabio Pizza, Elena Antelmi, Giulia Neccia, Martina Iloti, Alice Mazzoni, Patrizia Avoni, Giuseppe Plazzi
OBJECTIVE/BACKGROUND: Cataplexy is the pathognomonic symptom of narcolepsy type 1 (NT1). Since it is considered difficult to be directly observed or documented by clinicians, its diagnosis relies mainly on history taking. Our study aimed at testing the feasibility of a standardized video recording procedure under emotional stimulation to document cataplexy in the diagnostic work-up of suspected hypersomnia of central origin. PATIENTS/METHODS: Two-hundred-eight consecutive patients underwent the diagnostic work-up and reached the final diagnosis of NT1 (n = 133), idiopathic hypersomnia or narcolepsy type 2 (IH/NT2 group, n = 33), or subjective excessive daytime sleepiness (sEDS group, n = 42)...
October 9, 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29250981/update-on-treatment-for-idiopathic-hypersomnia
#5
Elisa Evangelista, Régis Lopez, Yves Dauvilliers
Idiopathic hypersomnia (IH) is a poorly characterized orphan central disorder of hypersomnolence responsible for excessive daytime sleepiness (EDS), prolonged nighttime sleep and sleep inertia that often require long-term symptomatic stimulant medication. To date, no drug has currently the authorization for the treatment of IH patients worldwide. Areas covered: The authors reviewed data on pharmacological treatment of IH obtained from published literature (Medline/PubMed/Web of Science) and Clinicaltrial.gov database from 1997 to 2017...
January 3, 2018: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/29244164/cortical-and-subcortical-brain-changes-in-children-and-adolescents-with-narcolepsy-type-1
#6
Manuela Tondelli, Fabio Pizza, Anna Elisabetta Vaudano, Giuseppe Plazzi, Stefano Meletti
Study Objectives: Neuroimaging studies on structural alterations in patients with type 1 narcolepsy (NT1) have shown controversial and heterogeneous results. The purpose of this study was to investigate microstructural brain changes in patients with NT1 close to disease onset. Methods: We examined cortical and subcortical grey matter volumes in 20 drug-naïve children and adolescents with NT1 compared with 19 healthy controls; whole-brain voxel-based morphometry, shape and volumetric analyses, and cortical thickness analysis were used...
December 13, 2017: Sleep
https://www.readbyqxmd.com/read/29221785/attention-deficit-hyperactivity-disorder-symptom-severity-and-sleep-problems-in-adult-participants-of-the-netherlands-sleep-registry
#7
Suzan W N Vogel, Denise Bijlenga, Jeroen S Benjamins, Aartjan T F Beekman, J J Sandra Kooij, Eus J W Van Someren
BACKGROUND: We examined whether current overall attention deficit hyperactivity disorder (ADHD), inattention, or hyperactivity symptom severities are associated with the current presence and persistent history of sleep problems. METHODS: N = 942 participants of the Netherlands Sleep Registry filled out online several validated questionnaires. Regression analyses were performed to assess the association between (1) current overall ADHD symptom severity and the current presence of sleep problems, (2) current ADHD symptom-severity groups and the persistent history of sleep problems, and (3) current inattention or hyperactivity symptom severities and the current presence of sleep problems...
December 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29221779/effect-of-sodium-oxybate-modafinil-and-their-combination-on-disrupted-nighttime-sleep-in-narcolepsy
#8
Yves Dauvilliers, Thomas Roth, Diane Guinta, Sarah Alvarez-Horine, Efim Dynin, Jed Black
OBJECTIVE: To assess the effects of three narcolepsy treatment modalities on sleep stage shifts associated with disrupted nighttime sleep (DNS) using data from a clinical trial. METHODS: Polysomnograms were reviewed from 155 patients (who had these data available at baseline and 8 weeks) of the 278 patients who were randomized to placebo, 9-g sodium oxybate (SXB)/nightly, 200-600 mg/d modafinil, or SXB + modafinil. Major outcomes of these post hoc analyses, analyzed using analysis of covariance, were change from baseline in number of shifts from Stages N2/3/rapid eye movement (REM) to Stage N1/Wake, and from Stage N1/Wake to REM...
December 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29220370/absence-of-anti-hypocretin-receptor-2-autoantibodies-in-post-pandemrix-narcolepsy-cases
#9
Guo Luo, Ling Lin, Louis Jacob, Mélodie Bonvalet, Aditya Ambati, Giuseppe Plazzi, Fabio Pizza, Ryan Leib, Christopher M Adams, Markku Partinen, Emmanuel Jean-Marie Mignot
BACKGROUND: A recent publication suggested molecular mimicry of a nucleoprotein (NP) sequence from A/Puerto Rico/8/1934 (PR8) strain, the backbone used in the construction of the reassortant strain X-179A that was used in Pandemrix® vaccine, and reported on anti-hypocretin (HCRT) receptor 2 (anti-HCRTR2) autoantibodies in narcolepsy, mostly in post Pandemrix® narcolepsy cases (17 of 20 sera). In this study, we re-examined this hypothesis through mass spectrometry (MS) characterization of Pandemrix®, and two other pandemic H1N1 (pH1N1)-2009 vaccines, Arepanrix® and Focetria®, and analyzed anti-HCRTR2 autoantibodies in narcolepsy patients and controls using three independent strategies...
2017: PloS One
https://www.readbyqxmd.com/read/29219048/sodium-oxybate-therapy-for-the-treatment-of-alcohol-withdrawal-syndrome-and-the-maintenance-of-alcohol-abstinence
#10
Carmen Mannucci, Simona Pichini, Elvira Ventura Spagnolo, Fabrizio Calapai, Sebastiano Gangemi, Michele Navarra, Gioacchino Calapai
BACKGROUND: Gamma-hydroxybutyrate (GHB or sodium oxybate) is both an exogenous and endogenous molecule with neuromodulator properties. In the United States, GHB is an approved drug for the treatment of narcolepsy and narcolepsy with cataplexy in adults. In some European Union countries, sodium oxybate is applied for the treatment of opioid and alcohol withdrawal. OBJECTIVE: The aim of the present review was to describe the state of art of the pre-clinical research and the clinical evidence related to GHB used alone or in combination with other treatments in alcohol withdrawal syndrome and alcohol abstinence maintenance...
December 7, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/29216286/migraine-and-risk-of-narcolepsy-in-children-a-nationwide-longitudinal-study
#11
Chun-Pai Yang, Meng-Lun Hsieh, Jen-Huai Chiang, Hsing-Yi Chang, Vivian Chia-Rong Hsieh
BACKGROUND: The association between migraine and narcolepsy remains controversial. We aim to investigate whether migraine is associated with an increased risk of developing narcolepsy in children. METHODS: In this longitudinal study, nationwide medical-claims data of pediatric patients (0-17y) with migraine are identified using the National Health Insurance Research Database (NHIRD) between 1997 and 2010 in Taiwan. Two cohorts are selected: migraine cases (n = 8,923) and propensity score-matched non-migraine controls (n = 35,692)...
2017: PloS One
https://www.readbyqxmd.com/read/29209667/narcolepsy-in-saudi-patients-before-and-after-the-2009-h1n1-vaccination-the-experience-of-2-referral-centers
#12
Shaden Q Qasrawi, Ali M Albarrak, Adel S Alharbi, Samar Nashwan, Aljohara S Almeneessier, Seithikurippu R Pandi-Perumal, Muslim M Alsaadi, Ahmed S BaHammam
To assess the number of Saudi patients diagnosed with narcolepsy in 2 tertiary centers before and after the introduction of the 2009 A(H1N1)pdm09 vaccine.  Methods: We started collecting data after the first international report of an association between the A(H1N1)pdm09 vaccine and narcolepsy between January 2010 and December 2016. All patients diagnosed with narcolepsy after 2009 were included and data were collected for 7 years to account for any possible delays in the diagnosis of narcolepsy.  Results: One-hundred and seventy-three patients with narcolepsy were identified...
December 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/29205601/criteria-for-gauging-response-to-sodium-oxybate-for-narcolepsy
#13
Alana D Steffen, Chinglin Lai, Terri E Weaver
Our objective was to define responder criteria using an anchor-based approach for frequency of cataplexy attacks and excessive daytime sleepiness in patients with narcolepsy undergoing sodium oxybate treatment. We used pooled data from two randomized, placebo-controlled, double-blind, multicentre 4- and 8-week trials of sodium oxybate for narcolepsy with cataplexy and analysed using receiver operator characteristics analysis. The percentage change in frequency of weekly cataplexy attacks and the Epworth Sleepiness Scale outcomes were compared with Clinical Global Impression of Change ratings, used as the anchor to define true response...
December 5, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/29198301/the-mslt-is-repeatable-in-narcolepsy-type-1-but-not-narcolepsy-type-2-a-retrospective-patient-study
#14
Chad Ruoff, Fabio Pizza, Lynn Marie Trotti, Karel Sonka, Stefano Vandi, Joseph Cheung, Swaroop Pinto, Mali Einen, Narong Simakajornboon, Fang Han, Paul Peppard, Sona Nevsimalova, Giuseppe Plazzi, David Rye, Emmanuel Mignot
STUDY OBJECTIVES: To examine repeatability of Multiple Sleep Latency Test (MSLT) results in narcolepsy type 1 (NT1) and narcolepsy type 2 (NT2) according to the criteria of the International Classification of Sleep Disorders, Third Edition (ICSD-3). METHODS: Repeatability of the MSLT was retrospectively evaluated in NT1 (n = 60) and NT2 (n = 54) cases, and controls (n = 15). All subjects had documented HLA-DQB1*06:02 status and/or hypocretin-1 levels from cerebrospinal fluid...
November 29, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29195824/pseudotumor-cerebri-syndrome-in-a-patient-with-narcolepsy-type-1
#15
Thomas Rossor, Ming Lim, Kirandeep VanDenEshof, Paul Gringras
Type 1 narcolepsy (NT1) is a chronic primary disorder of hypersomnolence characterized by excessive daytime sleepiness, cataplexy, sleep paralysis, hypnagogic hallucinations and disrupted nocturnal sleep. NT1 is linked to hypothalamic hypocretin deficiency, strongly associated with Human Leukocyte Antigen (HLA) marker DQB1*06:02 and of probable autoimmune origin. NT1 is usually associated with increased rates of overweight and obesity, and sometimes with increases in overnight blood pressure and increased rates of hypoventilation with raised CO2 levels overnight...
November 21, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/29186205/narcolepsy-susceptibility-gene-ccr3-modulates-sleep-wake-patterns-in-mice
#16
Hiromi Toyoda, Yoshiko Honda, Susumu Tanaka, Taku Miyagawa, Makoto Honda, Kazuki Honda, Katsushi Tokunaga, Tohru Kodama
Narcolepsy is caused by the loss of hypocretin (Hcrt) neurons and is associated with multiple genetic and environmental factors. Although abnormalities in immunity are suggested to be involved in the etiology of narcolepsy, no decisive mechanism has been established. We previously reported chemokine (C-C motif) receptor 3 (CCR3) as a novel susceptibility gene for narcolepsy. To understand the role of CCR3 in the development of narcolepsy, we investigated sleep-wake patterns of Ccr3 knockout (KO) mice. Ccr3 KO mice exhibited fragmented sleep patterns in the light phase, whereas the overall sleep structure in the dark phase did not differ between Ccr3 KO mice and wild-type (WT) littermates...
2017: PloS One
https://www.readbyqxmd.com/read/29171110/the-prevalence-of-narcolepsy-in-catalunya-spain
#17
Ester Tió, Carles Gaig, Maria Giner-Soriano, Odile Romero, Maria-José Jurado, Gemma Sansa, Montse Pujol, Oscar Sans, Ion Álvarez-Guerrico, Nuria Caballol, Marta Jimenez, Juan-Luis Becerra, Antonio Escartin, Carmen Monasterio, Albert Molins, Antoni Bove, Jaume Viña, Alex Iranzo, Roser Cambrodi, Gonzalo Calvo, Rosa Morros, Joan Santamaria
Previous studies have estimated an overall prevalence for narcolepsy between 15 and 70 cases per 100 000 inhabitants. We aimed to estimate the prevalence of narcolepsy in Catalunya (Catalonia), a north-east region of Spain (7 424 754 inhabitants), on 31 December 2014 by identifying all living subjects diagnosed with narcolepsy. First, we identified patients diagnosed by one of the 13 sleep, paediatric or neurological departments that perform tests regularly to diagnose narcolepsy. In a second phase, we searched for additional patients with narcolepsy in a clinical database of the primary health-care system...
November 24, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/29161567/the-biology-of-rem-sleep
#18
REVIEW
John Peever, Patrick M Fuller
Considerable advances in our understanding of the mechanisms and functions of rapid-eye-movement (REM) sleep have occurred over the past decade. Much of this progress can be attributed to the development of new neuroscience tools that have enabled high-precision interrogation of brain circuitry linked with REM sleep control, in turn revealing how REM sleep mechanisms themselves impact processes such as sensorimotor function. This review is intended to update the general scientific community about the recent mechanistic, functional and conceptual developments in our current understanding of REM sleep biology and pathobiology...
November 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29157595/comorbidity-of-narcolepsy-and-depressive-disorders-a-nationwide-population-based-study-in-taiwan
#19
Min-Jing Lee, Sheng-Yu Lee, Shin-Sheng Yuan, Chun-Ju Yang, Kang-Chung Yang, Tung-Liang Lee, Chi-Chin Sun, Yu-Chiau Shyu, Liang-Jen Wang
OBJECTIVE: Narcolepsy is a chronic sleep disorder that is likely to have neuropsychiatric comorbidities. Depression is a serious mood disorder that affects individuals' daily activities and functions. The current study aimed to investigate the relationship between narcolepsy and depressive disorders. METHODS: The study consisted of patients diagnosed with narcolepsy between January 2002, and December 2011 (n = 258), and age-matched and gender-matched controls (n = 2580) from Taiwan's National Health Insurance database...
November 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29149785/association-study-of-hla-dqb1-0602-allele-in-iranian-patients-with-narcolepsy
#20
Demeke Geremew, Ania Rahimi-Golkhandan, Khosro Sadeghniiat-Haghighi, Yadollah Shakiba, Ahmad Khajeh-Mehrizi, Bita Ansaripour, Maryam Izad
Narcolepsy is a rare, disabling disorder characterized by excessive daytime sleepiness, cataplexy, hypnagogic hallucinations and sleep paralysis. Several studies demonstrated its association with HLA-DQB1*0602 in various ethnic groups. Our study aimed to determine the prevalence of HLA-DQB1*0602 allele in Iranian patients with narcolepsy and assess its predictive parameters for diagnosing narcolepsy. In addition, car accidents and job problems were assessed among narcoleptic patients. We studied 44 narcoleptic patients, 30 patients with other types of excessive daytime sleepiness (EDS)  and 50 healthy age and sex matched individuals in this case-control study...
October 2017: Iranian Journal of Allergy, Asthma, and Immunology
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