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Biscarini F, Barateau L, Pizza F, Plazzi G, Dauvilliers Y. Narcolepsy and rapid eye movement sleep. J Sleep Res 2024:e14277. [PMID: 38955433 DOI: 10.1111/jsr.14277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/06/2024] [Accepted: 06/09/2024] [Indexed: 07/04/2024]
Abstract
Since the first description of narcolepsy at the end of the 19th Century, great progress has been made. The disease is nowadays distinguished as narcolepsy type 1 and type 2. In the 1960s, the discovery of rapid eye movement sleep at sleep onset led to improved understanding of core sleep-related disease symptoms of the disease (excessive daytime sleepiness with early occurrence of rapid eye movement sleep, sleep-related hallucinations, sleep paralysis, rapid eye movement parasomnia), as possible dysregulation of rapid eye movement sleep, and cataplexy resembling an intrusion of rapid eye movement atonia during wake. The relevance of non-sleep-related symptoms, such as obesity, precocious puberty, psychiatric and cardiovascular morbidities, has subsequently been recognized. The diagnostic tools have been improved, but sleep-onset rapid eye movement periods on polysomnography and Multiple Sleep Latency Test remain key criteria. The pathogenic mechanisms of narcolepsy type 1 have been partly elucidated after the discovery of strong HLA class II association and orexin/hypocretin deficiency, a neurotransmitter that is involved in altered rapid eye movement sleep regulation. Conversely, the causes of narcolepsy type 2, where cataplexy and orexin deficiency are absent, remain unknown. Symptomatic medications to treat patients with narcolepsy have been developed, and management has been codified with guidelines, until the recent promising orexin-receptor agonists. The present review retraces the steps of the research on narcolepsy that linked the features of the disease with rapid eye movement sleep abnormality, and those that do not appear associated with rapid eye movement sleep.
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Affiliation(s)
- Francesco Biscarini
- Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Lucie Barateau
- Sleep-Wake Disorders Unit, Department of Neurology, Gui-de-Chauliac Hospital, CHU Montpellier, Montpellier, France
- National Reference Centre for Orphan Diseases, Narcolepsy, Idiopathic Hypersomnia, and Kleine-Levin Syndrome, Montpellier, France
- Institute for Neurosciences of Montpellier, University of Montpellier, INSERM, Montpellier, France
| | - Fabio Pizza
- Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Giuseppe Plazzi
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio-Emilia, Modena, Italy
| | - Yves Dauvilliers
- Sleep-Wake Disorders Unit, Department of Neurology, Gui-de-Chauliac Hospital, CHU Montpellier, Montpellier, France
- National Reference Centre for Orphan Diseases, Narcolepsy, Idiopathic Hypersomnia, and Kleine-Levin Syndrome, Montpellier, France
- Institute for Neurosciences of Montpellier, University of Montpellier, INSERM, Montpellier, France
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Chin WC, Huang YS, Trevor Lam NY, Mak KY, Tang I, Wang CH, Lin C. Effects of modafinil on nocturnal sleep patterns in patients with narcolepsy: A cohort study. Sleep Med 2024; 119:95-102. [PMID: 38669836 DOI: 10.1016/j.sleep.2024.04.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 04/17/2024] [Accepted: 04/20/2024] [Indexed: 04/28/2024]
Abstract
BACKGROUND Patients with narcolepsy often experience disturbed nighttime sleep. Modafinil is commonly prescribed for hypersomnolence, but its impacts on nocturnal sleep remain unclear. This study uses actigraphy to examine the effect of modafinil on both hypersomnolence and nocturnal sleep patterns in patients with narcolepsy. METHODS Prior to treatment, 87 patients with narcolepsy wore an actigraphy for 7-14 days to assess their nighttime sleep. After evaluation, they received a daily dose of 200-400 mg of modafinil in the morning and wore an actigraphy again six months after initiating treatment. Questionnaires, including the Epworth-Sleepiness-Scale (ESS), the Visual-Analogue-for-Hypersomnolence (VAS), and the Short-Form-36-Health-Survey (SF-36), were used to evaluate hypersomnolence and quality of life both before and after treatment. Paired t-tests and independent samples t-tests were used for pre- and post-treatment comparisons and subgroup analysis. We used the Pearson's correlation test to measure the correlations between the sleep parameters of the actigraphy and data of the questionnaires. RESULTS Improvements in hypersomnolence were noted following modafinil treatment, and we observed no significant deterioration in nocturnal sleep parameters by the actigraphy. The total number of awakenings by actigraphy significantly decreased (p = 0.005), especially in females (p = 0.008), while sleep onset latency significantly increased in children/adolescents (p = 0.014). Correlations were found between the sleep parameters of the actigraphy and ESS, VAS, and SF-36 scores. CONCLUSION Modafinil treatment may not worsen nighttime sleep in patients with narcolepsy. However, it should be administered with care in children and adolescents.
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Affiliation(s)
- Wei-Chih Chin
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan; College of Life Sciences and Medicine, National Tsing Hua University, Hsinchu, Taiwan
| | - Yu-Shu Huang
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
| | - Ngo Yan Trevor Lam
- Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ka Yu Mak
- Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - I Tang
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chih-Huan Wang
- Department of Psychology, Zhejiang Normal University, Jinhua, China
| | - Chen Lin
- Department of Biomedical Sciences and Engineering, National Central University, Taoyuan, Taiwan
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Nisbet LC, Nixon GM, Anantharajah A, Davey MJ. Is there a role for repeating the multiple sleep latency test across childhood when initially non-diagnostic? Sleep Med 2024; 115:1-4. [PMID: 38286043 DOI: 10.1016/j.sleep.2024.01.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 01/31/2024]
Abstract
BACKGROUND The gold standard investigation for central disorders of hypersomnolence is the Multiple Sleep Latency Test (MSLT). As the clinical features of these disorders of hypersomnolence evolve with time in children, clinicians may consider repeating a previously non-diagnostic MSLT. Currently there are no guidelines available regards the utility and timing of repeating paediatric MSLTs. METHODS Retrospective review of children aged 3-18years with ≥2MSLTs between 2005 and 2022. Narcolepsy was defined as mean sleep latency (MSL) <8min with ≥2 sleep onset REM (SOREM); idiopathic hypersomnia (IH) was defined as MSL <8min with <2 SOREM. MSLTs not meeting these criteria were labelled non-diagnostic. RESULTS 19 children (9 female) with initial non-diagnostic MSLT underwent repeat MSLT, with 6 proceeding to a 3rd MSLT following 2 non-diagnostic MSLTs. The 2nd MSLT resulted in diagnosis in 6/19 (32 %) (3 narcolepsy, 3 IH); and 2/6 (33 %) 3rd MSLT were diagnostic (2 IH). Median age at initial MSLT was 7.5y (range 3.4-17.8y), with repeat performed after median of 2.9y (range 0.9-8.2y), and 3rd after a further 1.9 years (range 1.2-4.2y). Mean change in MSL on repeat testing was -2min (range -15.5min to +4.9min, p = 0.18). Of the 8 diagnostic repeat MSLTs, in addition to the MSL falling below 8 min, 2 children also developed ≥2 SOREM that had not been previously present. CONCLUSIONS A third of repeat MSLTs became diagnostic, suggesting repeat MSLT should be considered in childhood if clinical suspicion persists. Further work needs to address the ideal interval between MSLTs and diagnostic cut-points specific to the paediatric population.
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Affiliation(s)
- Lauren C Nisbet
- Melbourne Children's Sleep Centre, Monash Children's Hospital, Monash Health, Melbourne, Australia.
| | - Gillian M Nixon
- Melbourne Children's Sleep Centre, Monash Children's Hospital, Monash Health, Melbourne, Australia; Department of Paediatrics, Monash University, Melbourne, Australia
| | - Aveena Anantharajah
- Melbourne Children's Sleep Centre, Monash Children's Hospital, Monash Health, Melbourne, Australia
| | - Margot J Davey
- Melbourne Children's Sleep Centre, Monash Children's Hospital, Monash Health, Melbourne, Australia; Department of Paediatrics, Monash University, Melbourne, Australia
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Chin WC, Huang YS, Tang I, Lee PY, Wang CH, Chao KY. Impact of Taiwan's 2021 COVID-19 lockdown on the symptom severity and quality of life of patients with narcolepsy. Sleep Biol Rhythms 2023; 21:419–429. [PMID: 37363640 PMCID: PMC10113120 DOI: 10.1007/s41105-023-00458-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 04/05/2023] [Indexed: 06/28/2023]
Abstract
COVID-19 lockdowns can influence the sleep quality and daytime condition of patients with narcolepsy. Using data from our cohort study, we investigated changes in the quality of life and the symptom severity of patients with narcolepsy during Taiwan's 2021 lockdown and investigated differences by narcolepsy subtype, sex, and age. Patients with type 1 and type 2 narcolepsy (NT1 and NT2, respectively) aged 6-40 years were retrospectively recruited from our narcolepsy cohort study. These patients were regularly evaluated using the Short Form 36 Health Survey questionnaire (SF-36), the Epworth Sleepiness Scale (ESS), the visual analog scale (VAS) for hypersomnolence, the VAS for cataplexy and sleep diary. We compared the differences between the lockdown and the prelockdown periods by narcolepsy subtype, sex, and age. We used a paired t test analysis to compare differences in the SF-36, ESS, VAS scores and data of sleep diary between the prelockdown and lockdown periods (p1), and an independent t test analysis was used to compare the changes in different subgroups between the prelockdown and lockdown periods (p2). A total of 120 patients with narcolepsy were recruited (mean age 24.22 ± 6.87 years; 58% male); 80 of the patients had NT1 (mean age 25.25 ± 6.79 years; 60% male) and 40 had NT2 (mean age 22.16 ± 6.64, 53% male). During the lockdown period, the ESS score of total patients was decreased (p = 0.039) and body mass index was increased (p = 0.02). The NT1 group decreased significantly (p1 = 0.017), especially in men (p1 = 0.016) and adults (p1 = 0.04); scores for the VT domain of the SF-36 increased significantly in male and adult patients with NT2 (p1 = 0.048 and 0.012). Additionally, male patients with NT2 exhibited significantly decreased scores in the physical and emotional role functioning domains (p1 = 0.028, 0.024). The children and adolescents with NT1 had significantly decreased scores in the general health domain of the SF-36, but no significant change was noted in that of adults (p1 = 0.027, p2 = 0.012). We observed both negative and positive impacts of Taiwan's 2021 lockdown on patients with narcolepsy. A more flexible but structured daily routine with adequate sleep time should be considered for this population during lockdown and nonlockdown periods.
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Affiliation(s)
- Wei-Chih Chin
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Shu Huang
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - I. Tang
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Pin-Yi Lee
- Department of Clinical Psychology, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Chih-Huan Wang
- Department of Psychology, Zhejiang Normal University, Jinhua, China
| | - Kuo-Yu Chao
- Department of Nursing, Chang Gung University of Science and Technology, Taoyuan, Taiwan
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Chin WC, Wang CH, Huang YS, Hsu JF, Chu KC, Tang I, Paiva T. Quality of life changes and their predictors in young adult narcolepsy patients after treatment: A real-world cohort study. Front Psychiatry 2022; 13:956037. [PMID: 36016973 PMCID: PMC9395703 DOI: 10.3389/fpsyt.2022.956037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 07/15/2022] [Indexed: 11/13/2022] Open
Abstract
Background We conducted a five-year prospective follow-up study to track the real-world quality of life of patients with narcolepsy after medication and analyzed predictors. Methods The study ultimately included 157 participants who completed 5-year follow-up, 111 had type 1 narcolepsy (NT1) and 46 had type 2 narcolepsy (NT2). Polysomnography, multiple sleep latency test, actigraphy and HLA-typing were conducted. The Short Form 36 Health Survey Questionnaire (SF-36), the Stanford Center for Narcolepsy Sleep Inventory, the Epworth Sleepiness Scale (ESS), the visual analog for hypersomnolence (VAS), and Conners' Continuous Performance Test were used. Descriptive statistics, repeated measures, and hierarchical linear models were applied for analysis. Results Most demographic and clinical data did not significantly differ between groups, but the NT1 group had significantly more overweight, more severe narcoleptic symptoms, more positive HLA typing, shorter mean sleep latency, and more sleep onset rapid eye movement periods. No significant change to the physical domains of SF-36 was found in the total group, but we observed significant changes in emotional role functioning and social function. The NT1 group showed significant improvements in physical role functioning, emotional role functioning, and social function. The NT2 group demonstrated significant improvements in emotional role functioning. At the baseline, the NT2 group had significantly better scores, but there was no significant group difference after treatment, except for physical and social function. ESS and VAS were significantly improved during follow-up. At the baseline, the NT1 group had significantly higher ESS and VAS scores, and continuously significantly higher ESS scores during follow-up. Narcolepsy types, HLA typing, age of onset, symptom severity, attention and vigilance were significantly correlated with SF-36. Conclusion Symptom control greatly associates with the quality of life in narcoleptic patients, and medication can play the most important role. Management targeting narcoleptic symptoms, attention impairment, and drug adherence should be provided.
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Affiliation(s)
- Wei-Chih Chin
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chih-Huan Wang
- Department of Psychology, Zhejiang Normal University, Jinhua, China
| | - Yu-Shu Huang
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Jen-Fu Hsu
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Kuo-Chung Chu
- Department of Information Management, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
| | - I Tang
- Division of Psychiatry and Sleep Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Teresa Paiva
- Neurophysiology and Sleep Medicine, University of Lisbon, Lisbon, Portugal
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Chung IH, Chin WC, Huang YS, Wang CH. Pediatric Narcolepsy-A Practical Review. CHILDREN (BASEL, SWITZERLAND) 2022; 9:974. [PMID: 35883958 PMCID: PMC9320719 DOI: 10.3390/children9070974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/21/2022] [Accepted: 06/24/2022] [Indexed: 11/16/2022]
Abstract
Pediatric narcolepsy is a chronic sleep-wakefulness disorder. Its symptoms frequently begin in childhood. This review article examined the literature for research reporting on the effects of treatment of pediatric narcolepsy, as well as proposed etiology and diagnostic tools. Symptoms of pediatric narcolepsy include excessive sleepiness and cataplexy. In addition, rapid-eye-movement-related phenomena such as sleep paralysis, sleep terror, and hypnagogic or hypnapompic hallucinations can also occur. These symptoms impaired children's function and negatively influenced their social interaction, studying, quality of life, and may further lead to emotional and behavioral problems. Therefore, early diagnosis and intervention are essential for children's development. Moreover, there are differences in clinical experiences between Asian and Western population. The treatment of pediatric narcolepsy should be comprehensive. In this article, we review pediatric narcolepsy and its treatment approach: medication, behavioral modification, and education/mental support. Pharmacological treatment including some promising newly-developed medication can decrease cataplexy and daytime sleepiness in children with narcolepsy. Other forms of management such as psychosocial interventions involve close cooperation between children, school, family, medical personnel, and can further assist their adjustment.
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Affiliation(s)
- I-Hang Chung
- Department of Child Psychiatry and Sleep Center, Chang Gung Memorial Hospital and College of Medicine, Taoyuan 333, Taiwan; (I.-H.C.); (W.-C.C.)
| | - Wei-Chih Chin
- Department of Child Psychiatry and Sleep Center, Chang Gung Memorial Hospital and College of Medicine, Taoyuan 333, Taiwan; (I.-H.C.); (W.-C.C.)
| | - Yu-Shu Huang
- Department of Child Psychiatry and Sleep Center, Chang Gung Memorial Hospital and College of Medicine, Taoyuan 333, Taiwan; (I.-H.C.); (W.-C.C.)
| | - Chih-Huan Wang
- Department of Psychology, Zhejiang Normal University, Jinhua 321004, China;
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Kelly MR, Zeidler MR, DeCruz S, Oldenkamp CL, Josephson KR, Mitchell MN, Littner M, Ancoli-Israel S, Badr MS, Alessi CA, Martin JL. Actigraphy prior to Multiple Sleep Latency Test: nighttime total sleep time predicts sleep-onset latency. J Clin Sleep Med 2022; 18:161-170. [PMID: 34310278 PMCID: PMC8807926 DOI: 10.5664/jcsm.9528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
STUDY OBJECTIVES To evaluate the clinical utility of actigraphy as compared with sleep questionnaires prior to the Multiple Sleep Latency Test (MSLT) in a sleep disorders clinic population. METHODS Twenty-eight clinically referred participants (mean age: 42.3 ± 18.8 years) completed the study protocol. On day 1, participants completed the following questionnaires: Epworth Sleepiness Scale (ESS), Insomnia Severity Index, Pittsburgh Sleep Quality Index (PSQI), Visual Analog Scale (affect, vigor), Patient Health Questionnaire, and Multidimensional Fatigue Symptom Inventory-Short Form. On days 1-8, participants wore an actigraph and completed a sleep diary to assess mean nighttime and mean daytime total sleep time and sleep efficiency or sleep percentage. On day 9, participants repeated the ESS and completed an MSLT. Correlations assessed mean MSLT sleep-onset latency (MSLT-SOL) vs actigraphy, sleep diary, and questionnaires. Chi-square analyses assessed abnormal MSLT-SOL (≤ 8 minutes) or daytime sleepiness (ESS ≥ 10) and referral question (ie, sleep-disordered breathing vs hypersomnolence disorder). RESULTS Mean MSLT-SOL was correlated with nighttime total sleep time assessed via both actigraphy and diary, but not with questionnaires. Significant correlations emerged for ESS score on day 1 vs 9, actigraphy vs sleep diary mean nighttime total sleep time, and PSQI vs mean sleep diary sleep efficiency. There was no significant relationship between mean MSLT-SOL and referral question. CONCLUSIONS Our finding that total sleep time measured by actigraphy was associated with MSLT-SOL suggests it is useful in informing the interpretation of MSLT findings; however, it does not appear to be a viable substitute for MSLT for the measurement of objective sleepiness in clinical settings. CITATION Kelly MR, Zeidler MR, DeCruz S, et al. Actigraphy prior to Multiple Sleep Latency Test: nighttime total sleep time predicts sleep-onset latency. J Clin Sleep Med. 2022;18(1):161-170.
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Affiliation(s)
- Monica R. Kelly
- Veterans Affairs Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, North Hills, California
| | - Michelle R. Zeidler
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California,Veterans Affairs Greater Los Angeles Healthcare System, Division of Pulmonary Medicine, North Hills, California
| | - Sharon DeCruz
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Caitlin L. Oldenkamp
- Department of Emergency Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Karen R. Josephson
- Veterans Affairs Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, North Hills, California
| | - Michael N. Mitchell
- Veterans Affairs Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, North Hills, California
| | - Michael Littner
- Veterans Affairs Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, North Hills, California,Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | | | - M. Safwan Badr
- Wayne State University, Detroit, Michigan,John D. Dingell Veterans Affairs Medical Center, Detroit, Michigan
| | - Cathy A. Alessi
- Veterans Affairs Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, North Hills, California,Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Jennifer L. Martin
- Veterans Affairs Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, North Hills, California,Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California,Address correspondence to: Jennifer L. Martin, PhD, VA Sepulveda Ambulatory Care Center, 16111 Plummer Street (11E), North Hills, CA 91343;
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Um YH, Oh J, Kim SM, Kim TW, Seo HJ, Jeong JH, Hong SC. Differential characteristics of repeated polysomnography and multiple sleep latency test parameters in narcolepsy type 1 and type 2 patients: a longitudinal retrospective study. Sleep Breath 2021; 26:1939-1946. [PMID: 34820763 DOI: 10.1007/s11325-021-02525-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/27/2021] [Accepted: 11/16/2021] [Indexed: 11/29/2022]
Abstract
PURPOSE Narcolepsy is a chronic disorder and its phenotype is dichotomized into narcolepsy type 1 (NT1) and narcolepsy type 2 (NT2). The clinical course and pathophysiological mechanisms of these two clinical entities and their differences are not adequately defined. This study aimed to explore the differential longitudinal patterns of polysomnography (PSG) and multiple sleep latency test (MSLT) in NT1 and NT2. METHODS In this retrospective study demographic characteristics, PSG, and MSLT parameters at baseline and follow-up were compared between NT1 and NT2 patients. Patients with both follow-up MSLT and PSG were selected for sub-group analysis. Baseline and follow-up MSLT and PSG parameters were compared. RESULTS Of 55 patients with narcolepsy, mean follow-up periods were 7.4 ± 3.5 years for NT1 and 5.5 ± 2.9 for NT2. Demographic data showed increased body mass index and prevalence of sleep paralysis in NT1. Baseline PSG characteristics between NT1 and NT2 showed decreased sleep latency (p = 0.016) and REM latency (p = 0.046) in NT1 group when compared with NT2. Nocturnal SOREMP on PSG was more prevalent in NT1 (p = 0.017), and half of NT2 patients with nocturnal SOREMP on PSG changed their diagnoses to NT1. On follow-up PSG, NT1 displayed reductions in sleep stage N2 (p = 0.006) and N3 (p = 0.048), while wake after sleep onset (WASO) (p = 0.023) and apnea-hypopnea index (AHI) (p = 0.007) were significantly increased. CONCLUSION Differential MSLT and PSG characteristics of NT1 and NT2 in at baseline and follow-up indicate that NT1 and NT2 are distinct disease phenotypes, and that they present with a contrasting course of disease.
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Affiliation(s)
- Yoo Hyun Um
- Department of Psychiatry, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, 93, Jungbu-daero, Paldal-guGyeonggi-do, Suwon-si, 16247, Republic of Korea
| | - Jihye Oh
- Department of Psychiatry, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sung-Min Kim
- Department of Psychiatry, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, 93, Jungbu-daero, Paldal-guGyeonggi-do, Suwon-si, 16247, Republic of Korea
| | - Tae-Won Kim
- Department of Psychiatry, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, 93, Jungbu-daero, Paldal-guGyeonggi-do, Suwon-si, 16247, Republic of Korea
| | - Ho-Jun Seo
- Department of Psychiatry, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, 93, Jungbu-daero, Paldal-guGyeonggi-do, Suwon-si, 16247, Republic of Korea
| | - Jong-Hyun Jeong
- Department of Psychiatry, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, 93, Jungbu-daero, Paldal-guGyeonggi-do, Suwon-si, 16247, Republic of Korea
| | - Seung-Chul Hong
- Department of Psychiatry, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, 93, Jungbu-daero, Paldal-guGyeonggi-do, Suwon-si, 16247, Republic of Korea.
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Villarreal B, Powell T, Brock MS, Hansen S. Diagnosing narcolepsy in the active duty military population. Sleep Breath 2021; 25:995-1002. [PMID: 33629215 DOI: 10.1007/s11325-020-02163-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/29/2020] [Accepted: 08/01/2020] [Indexed: 11/24/2022]
Abstract
PURPOSE Narcolepsy type I and type II are central hypersomnias characterized by excessive daytime sleepiness and nocturnal sleep disruptions. These rare disorders make the diagnosis complex, as multiple sleep disorders are known to cause false-positive results on testing. There is a high incidence of sleep disorders in the military, and the diagnosis of narcolepsy can have serious career implications. This study looked to assess for the presence of confounding disorders in patients previously diagnosed with narcolepsy. METHODS We conducted a retrospective analysis of patients aged 18-65 previously diagnosed with narcolepsy at an outside facility, referred for repeat evaluation at the Wilford Hall Sleep Disorders Center. Previous test results from the time of original diagnosis were reviewed if available and compared with repeat evaluation which included actigraphy, in-laboratory polysomnography, and multiple sleep latency testing. RESULTS Of the 23 patients, 2 (9%) retained a diagnosis of narcolepsy after repeat testing. Ten patients (43%) had insufficient sleep syndrome, five (22%) had significant circadian rhythm sleep-wake disorders, and nine (39%) patients were diagnosed with mild obstructive sleep apnea (OSA). Four of the nine patients with OSA (44%) had supine predominant OSA. CONCLUSION Diagnostic testing for narcolepsy may be influenced by the presence of comorbid sleep disorders including sleep-disordered breathing, insufficient sleep duration, and circadian misalignment which are common in active military personnel. This study emphasizes the importance of excluding these comorbid diagnoses in this population.
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Affiliation(s)
- Bernadette Villarreal
- Department of Sleep Medicine, San Antonio Military Medical Center, Joint Base San Antonio Lackland, 2200 Bergquist Drive, Suite 1, San Antonio, TX, 78236, USA.
| | - Tyler Powell
- Department of Sleep Medicine, San Antonio Military Medical Center, Joint Base San Antonio Lackland, 2200 Bergquist Drive, Suite 1, San Antonio, TX, 78236, USA
| | - Matthew S Brock
- Department of Sleep Medicine, San Antonio Military Medical Center, Joint Base San Antonio Lackland, 2200 Bergquist Drive, Suite 1, San Antonio, TX, 78236, USA
| | - Shana Hansen
- Department of Sleep Medicine, San Antonio Military Medical Center, Joint Base San Antonio Lackland, 2200 Bergquist Drive, Suite 1, San Antonio, TX, 78236, USA
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10
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Trotti LM. Twice is nice? Test-retest reliability of the Multiple Sleep Latency Test in the central disorders of hypersomnolence. J Clin Sleep Med 2021; 16:17-18. [PMID: 33054965 DOI: 10.5664/jcsm.8884] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Lynn Marie Trotti
- Department of Neurology and Emory Sleep Center, Emory University School of Medicine, Atlanta, Georgia
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Vellieux G, Frija-Masson J, Rouvel-Tallec A, Drouot X, d'Ortho MP. Narcolepsy Type 1: A Remitting Disease? An Unusual Case Report. Nat Sci Sleep 2021; 13:1669-1673. [PMID: 34594143 PMCID: PMC8478422 DOI: 10.2147/nss.s311283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 06/16/2021] [Indexed: 11/23/2022] Open
Abstract
We describe the case of a male patient who was diagnosed with narcolepsy type 1 on the basis of sleep and wake symptoms, and the results of investigations including video-polysomnography, multiple sleep latency test, human leukocyte antigen status and orexin level in cerebrospinal fluid. During the first years after disease onset, the patient did not show any significant improvement despite treatment with a variety of stimulant and anti-cataplectic drugs. However, spontaneous remission of disease occurred after 15 years.
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Affiliation(s)
- Geoffroy Vellieux
- Université de Paris, NeuroDiderot, Inserm, Paris, F-75019, France.,Centre du sommeil, Service de Physiologie - Explorations Fonctionnelles, AP-HP, Hôpital Bichat-Claude Bernard, Paris, F-75018, France
| | - Justine Frija-Masson
- Université de Paris, NeuroDiderot, Inserm, Paris, F-75019, France.,Centre du sommeil, Service de Physiologie - Explorations Fonctionnelles, AP-HP, Hôpital Bichat-Claude Bernard, Paris, F-75018, France
| | - Anny Rouvel-Tallec
- Université de Paris, NeuroDiderot, Inserm, Paris, F-75019, France.,Centre du sommeil, Service de Physiologie - Explorations Fonctionnelles, AP-HP, Hôpital Bichat-Claude Bernard, Paris, F-75018, France
| | - Xavier Drouot
- Neurophysiologie Clinique et Explorations Fonctionnelles, CHU de Poitiers, Poitiers, France
| | - Marie-Pia d'Ortho
- Université de Paris, NeuroDiderot, Inserm, Paris, F-75019, France.,Centre du sommeil, Service de Physiologie - Explorations Fonctionnelles, AP-HP, Hôpital Bichat-Claude Bernard, Paris, F-75018, France
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12
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Ding Q, Li J, Xiao F, Zhang C, Dong X, Han F. Anti-streptococcal antibodies in Chinese patients with type -1 narcolepsy. Sleep Med 2020; 72:37-40. [PMID: 32540635 DOI: 10.1016/j.sleep.2020.03.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/13/2020] [Accepted: 03/16/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Narcolepsy type 1 (NT1) is considered to be an autoimmune disease, and streptococcal infection may be an environmental trigger. However, previous studies from Asian narcolepsy patients did not reveal elevated anti-streptolysin O [ASO]. The aim is to investigate whether large sample Chinese patients with NT1 have an increase in antistreptococcal antibody titers. METHODS A total of 214 narcolepsy patients and 360 healthy controls were recruited. All patients were DQB1∗0602 positive with clear-cut cataplexy or had low CSF hypocretin-1. Participants were tested for ASO and anti DNAse B [ADB]. These patients were divided into five groups according to disease duration, including 29 patients less than 3 months; 25 from 3 months to 1 year; 40 from 1 to 3 years; 61 from 3 to 10 years and 59 patients over 10 years. Comparison was also made between children and adults with age matched controls, respectively. RESULTS There were no significant differences between patients and healthy controls in regard to both ASO ≥200 IU (19.2% vs. 16.9%, p = 0.50) and ADB≥480IU (9.8% vs. 10.3%, p = 0.86). For children narcolepsy patients, ASO positive rates (19.8% vs. 18%, p = 0.68) and ADB positive rates (10.4% vs. 12%, p = 0.72) had no differences compared to age matched controls. No difference was observed in adult narcolepsy patients either, with ASO positive rates (18.5% vs. 13.8%, p = 0.39) and ADB positive rates (9.3% vs. 5.3%, p = 0.42) compared to age matched controls, respectively. ASO and ADB positive rates had no significant differences among different disease duration groups (p = 0.55 and 0.9, respectively). CONCLUSION Streptococcus infection reflected by increase of ASO and ADB levels was not found in Chinese patients with type 1 narcolepsy, additional triggers for narcolepsy need to be addressed in this population.
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Affiliation(s)
- Qidi Ding
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Jing Li
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Fulong Xiao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Chi Zhang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Xiaosong Dong
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Fang Han
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China.
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13
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Sex and age differences in the association between anxiety disorders and narcolepsy: A nationwide population-based case control study. J Affect Disord 2020; 264:130-137. [PMID: 32056742 DOI: 10.1016/j.jad.2019.12.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 12/01/2019] [Accepted: 12/04/2019] [Indexed: 12/20/2022]
Abstract
BACKGROUND To examine the association between narcolepsy and anxiety disorders. METHODS This population-based, retrospective case-control study analyzed Taiwan's National Health Insurance Research Database between 2000 and 2013. We included narcoleptic patients aged at least 12 years, diagnosed according to the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) code 347. The cases and the propensity score-matched controls were selected in a 1:4 ratio. Each subject with anxiety disorders (ICD-9-CM code 300) was required to visit the outpatient clinic at least three times within a year. Multivariate logistic regression and interaction analyses were used to calculate the association between anxiety disorders and narcolepsy. RESULTS This study enrolled 478 and 1912 subjects with and without narcolepsy, respectively. After adjusting for covariates, patients with anxiety disorders had an approximately 2.7 odds ratio of developing narcolepsy when compared to the control subjects (adjusted odds ratio [aOR)] = 2.7; 95% confidence interval [CI] = 1.699-4.344). Interaction analysis and subgroup analysis showed a higher incidence of previously diagnosed anxiety disorders in narcoleptic patients aged 12 to 17 years and female patients (aOR = 25.9; 95% CI = 15.194-42.896; aOR = 3.6; 95% CI = 1.818-7.062, respectively). LIMITATIONS The narcolepsy and anxiety disorders were not distinguished by validated structural diagnostic instruments. CONCLUSIONS The results of this study revealed higher comorbidity rates of anxiety disorders in narcoleptic patients. The incidence of previously diagnosed anxiety disorders was higher in narcoleptic patients aged 12 to 17 years and female patients.
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Narcolepsy — clinical spectrum, aetiopathophysiology, diagnosis and treatment. Nat Rev Neurol 2019; 15:519-539. [DOI: 10.1038/s41582-019-0226-9] [Citation(s) in RCA: 204] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2019] [Indexed: 12/15/2022]
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15
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Pogach M, Thomas RJ. Challenging Circadian Rhythm Disorder Cases. Neurol Clin 2019; 37:579-599. [PMID: 31256791 DOI: 10.1016/j.ncl.2019.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The complex interplay of the sleep and circadian systems, which are substantially differentially regulated, provides for plasticity that is expressed in health and disease. The classic circadian rhythm disorders are readily recognizable, but atypical forms can be identified by actigraphy and melatonin profilometry. Although the dim-light melatonin onset test maps the start of the biological night, 24-hour mapping can define the limits of the biological night, whereas other forms of strategic testing can identify conditions such as iatrogenic hypermelatoninemia. Routine testing in clinical practice can expand the range of identifiable circadian rhythm disorders.
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Affiliation(s)
- Melanie Pogach
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Beth Israel Deaconess Medical Center, KB-23 (Pulmonary Office), 300 Brookline Avenue, Boston, MA 02215, USA
| | - Robert Joseph Thomas
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Beth Israel Deaconess Medical Center, KB-23 (Pulmonary Office), 300 Brookline Avenue, Boston, MA 02215, USA.
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