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Oh J, Cho E, Um YH, Oh SH, Hong SC. Narcolepsy is associated with an increased risk of HLA-related autoimmune diseases: Evidence from a nationwide healthcare system data in South Korea. Sleep Med 2023; 105:37-42. [PMID: 36958254 DOI: 10.1016/j.sleep.2023.03.006] [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: 10/27/2022] [Revised: 01/27/2023] [Accepted: 03/05/2023] [Indexed: 03/25/2023]
Abstract
STUDY OBJECTIVES To determine the incidence rate of narcolepsy in South Korea and closely examine the relationship between narcolepsy, which is believed to be an autoimmune response, and other systemic autoimmune diseases. METHODS We examined data from the South Korean nationwide health insurance claims database from 2010 to 2019. Our study included patients with narcolepsy as well as age- and sex-matched controls without narcolepsy. We estimated the incidence of narcolepsy and the odds ratio of narcolepsy and associated autoimmune comorbidities in South Korea. RESULTS We identified 8710 patients with narcolepsy (59.8% men and 40.2% women). The incidence of narcolepsy was 0.05%. Patients with narcolepsy were at a significantly high risk of ankylosing spondylitis, rheumatoid arthritis, and Sjögren's syndrome, which diseases are known to be related to human leukocyte antigen (HLA) genes. CONCLUSIONS Narcolepsy is closely related to systemic autoimmune diseases, particularly those related to HLA genes.
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Affiliation(s)
- Jihye Oh
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, South Korea
| | - Eunhae Cho
- Department of Colorectal Surgery, Seoul Asan Medical Center, Ulsan University, South Korea
| | - Yoo-Hyun Um
- Department of Psychiatry, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, South Korea
| | - Sei Hoon Oh
- Department of Environmental Horticulture, College of Natural Science, The University of Seoul, South Korea
| | - Seung-Chul Hong
- Department of Psychiatry, College of Medicine, The Catholic University of Korea, South Korea; Department of Psychiatry, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, South Korea.
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Obesity as a risk factor for severe influenza infection in children and adolescents: a systematic review and meta-analysis. Eur J Pediatr 2023; 182:363-374. [PMID: 36369400 PMCID: PMC9652042 DOI: 10.1007/s00431-022-04689-0] [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: 07/29/2022] [Revised: 10/30/2022] [Accepted: 11/01/2022] [Indexed: 11/13/2022]
Abstract
UNLABELLED Obesity has been recently identified as a predisposing factor for a worse prognosis in viral illnesses such as SARS-CoV-2; however, its role in children with influenza is not yet clarified. The current systematic review and meta-analysis aims to assess whether obesity is a risk factor for either hospitalization or a worse prognosis when hospitalized among children infected by influenza. We systematically searched the following databases using a structured algorithm: MEDLINE, Clinicaltrials.gov, and Cochrane Central Register of Controlled Trials (CENTRAL). Statistical meta-analysis was performed using the "meta" package in R software, and included studies were evaluated using the Newcastle-Ottawa scale. Among children with influenza, obesity increased the odds of hospitalization with a pooled OR of 1.89 (95% CI [1.23, 2.9], I2 = 0, p = 0.003). When hospitalized, children with obesity were also more likely to have a worse outcome than their healthy-weight counterparts, with a pooled OR of 1.24 (95% Cl [1.02; 1.51], I2 = 11, p = 0.03). In an effort to lower heterogeneity, a leave-one-out meta-analysis was conducted. Publication bias was assessed with the visual inspection of funnel plots and the trim-and-fill method. Certainty assessment was evaluated using the GRADE score. CONCLUSIONS The findings of our meta-analysis suggest that obesity in children with influenza is associated with a worse prognosis, both hospitalization and ICU admission/death. WHAT IS KNOWN • Obesity has been identified as a risk factor for non-communicable as well as communicable diseases. • A previous meta-analysis failed to demonstrate a statistically significant association between obesity and influenza infection severity. WHAT IS NEW • Children with high BMI and influenza infection are more likely to get hospitalized. • Pediatric inpatients with increased BMI and influenza infection may have a worse prognosis.
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Viste R, Viken MK, Lie BA, Juvodden HT, Nordstrand SEH, Thorsby PM, Rootwelt T, Kornum BR, Knudsen-Heier S. High nocturnal sleep fragmentation is associated with low T lymphocyte P2Y11 protein levels in narcolepsy type 1. Sleep 2021; 44:zsab062. [PMID: 33710305 PMCID: PMC8361345 DOI: 10.1093/sleep/zsab062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 01/31/2021] [Indexed: 11/12/2022] Open
Abstract
STUDY OBJECTIVES Narcolepsy type 1 (NT1) is associated with hypocretin neuron loss. However, there are still unexplained phenotypic NT1 features. We investigated the associations between clinical and sleep phenotypic characteristics, the NT1-associated P2RY11 polymorphism rs2305795, and P2Y11 protein levels in T lymphocytes in patients with NT1, their first-degree relatives and unrelated controls. METHODS The P2RY11 SNP was genotyped in 100 patients (90/100 H1N1-(Pandemrix)-vaccinated), 119 related and 123 non-related controls. CD4 and CD8 T lymphocyte P2Y11 protein levels were quantified using flow cytometry in 167 patients and relatives. Symptoms and sleep recording parameters were also collected. RESULTS We found an association between NT1 and the rs2305795 A allele (OR = 2, 95% CI (1.3, 3.0), p = 0.001). T lymphocyte P2Y11 protein levels were significantly lower in patients and relatives homozygous for the rs2305795 risk A allele (CD4: p = 0.012; CD8: p = 0.007). The nocturnal sleep fragmentation index was significantly negatively correlated with patients' P2Y11 protein levels (CD4: p = 0.004; CD8: p = 0.006). Mean MSLT sleep latency, REM-sleep latency, and core clinical symptoms were not associated with P2Y11 protein levels. CONCLUSIONS We confirmed that the P2RY11 polymorphism rs2305795 is associated with NT1 also in a mainly H1N1-(Pandemrix)-vaccinated cohort. We demonstrated that homozygosity for the A risk allele is associated with lower P2Y11 protein levels. A high level of nocturnal sleep fragmentation was associated with low P2Y11 levels in patients. This suggests that P2Y11 has a previously unknown function in sleep-wake stabilization that affects the severity of NT1.
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Affiliation(s)
- Rannveig Viste
- Norwegian Center of Expertise for Neurodevelopmental Disorders and Hypersomnias (NevSom), Department of Rare Disorders, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Marte K Viken
- Department of Immunology, University of Oslo and Oslo University Hospital, Oslo, Norway
- Department of Medical Genetics, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Benedicte A Lie
- Department of Immunology, University of Oslo and Oslo University Hospital, Oslo, Norway
- Department of Medical Genetics, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Hilde T Juvodden
- Norwegian Center of Expertise for Neurodevelopmental Disorders and Hypersomnias (NevSom), Department of Rare Disorders, Oslo University Hospital, Oslo, Norway
| | - Sebjørg E H Nordstrand
- Norwegian Center of Expertise for Neurodevelopmental Disorders and Hypersomnias (NevSom), Department of Rare Disorders, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Per M Thorsby
- Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Terje Rootwelt
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Birgitte R Kornum
- Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Stine Knudsen-Heier
- Norwegian Center of Expertise for Neurodevelopmental Disorders and Hypersomnias (NevSom), Department of Rare Disorders, Oslo University Hospital, Oslo, Norway
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Viste R, Lie BA, Viken MK, Rootwelt T, Knudsen-Heier S, Kornum BR. Narcolepsy type 1 patients have lower levels of effector memory CD4 + T cells compared to their siblings when controlling for H1N1-(Pandemrix™)-vaccination and HLA DQB1∗06:02 status. Sleep Med 2021; 85:271-279. [PMID: 34388506 DOI: 10.1016/j.sleep.2021.07.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 06/15/2021] [Accepted: 07/13/2021] [Indexed: 10/20/2022]
Abstract
STUDY OBJECTIVES Evidence suggests a cell-mediated autoimmune pathogenesis for narcolepsy type 1 (NT1), but it is not clear whether the disease is associated with overall changes in T cell subsets. The increase in NT1 incidence after H1N1 vaccination campaign with the Pandemrix™ vaccine suggests that disease-relevant changes in the immune system following this vaccination were important. In this study, we aimed to investigate differentiated T cell subsets and levels of CD25 and CD69 activation markers in a cohort of mainly Pandemrix™-vaccinated NT1 patients compared with their vaccinated and unvaccinated siblings. METHODS Peripheral blood mononuclear cells were collected in parallel and analysed with flow cytometry in 31 NT1 patients with disease onset after the 2009 influenza A (H1N1) pandemic and/or Pandemrix™ vaccination and 45 of their non-narcoleptic siblings (29/31 and 34/45 vaccinated, respectively). RESULTS We observed significantly lower effector memory CD4+ T cell levels in NT1 patients compared to their siblings, when controlling for HLA DQB1∗06:02 and vaccination status. Further, within the sibling group, vaccination status significantly affected frequencies of central memory and CD8+CD25+ T cells, and HLA DQB1∗06:02 status significantly affected frequencies of CD4+CD25+ T cells. CONCLUSION We confirm that NT1 is associated with lower levels of effector memory CD4+ T cells in peripheral blood. Importantly, this finding was only significant when controlling for vaccination and HLA status in both patients and controls. We thus demonstrate the importance of characterizing such factors (eg HLA and vaccination) when studying T cell subsets in NT1. This might explain earlier conflicting results.
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Affiliation(s)
- Rannveig Viste
- Norwegian Centre of Expertise for Neurodevelopmental Disorders and Hypersomnias (NevSom), Department of Rare Disorders, Oslo University Hospital, Norway; Institute of Clinical Medicine, University of Oslo, Norway
| | - Benedicte A Lie
- Department of Immunology, University of Oslo and Oslo University Hospital, Norway; Department of Medical Genetics, University of Oslo and Oslo University Hospital, Norway
| | - Marte K Viken
- Department of Immunology, University of Oslo and Oslo University Hospital, Norway; Department of Medical Genetics, University of Oslo and Oslo University Hospital, Norway
| | - Terje Rootwelt
- Institute of Clinical Medicine, University of Oslo, Norway; Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Norway
| | - Stine Knudsen-Heier
- Norwegian Centre of Expertise for Neurodevelopmental Disorders and Hypersomnias (NevSom), Department of Rare Disorders, Oslo University Hospital, Norway
| | - Birgitte R Kornum
- Kornum Laboratory, Department of Neuroscience, University of Copenhagen, Denmark.
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Abstract
Sleep is essential for healthy being and healthy functioning of human body as a whole, as well as each organ and system. Sleep disorders, such as sleep-disordered breathing, insomnia, sleep fragmentation, and sleep deprivation are associated with the deterioration in human body functioning and increased cardiovascular risks. However, owing to the complex regulation and heterogeneous state sleep per se can be associated with cardiovascular dysfunction in susceptible subjects. The understanding of sleep as a multidimensional concept is important for better prevention and treatment of cardiovascular diseases.
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Affiliation(s)
- Lyudmila Korostovtseva
- Sleep Laboratory, Research Department for Hypertension, Department for Cardiology, Almazov National Medical Research Centre, 2 Akkuratov Street, St Petersburg 197341, Russia.
| | - Mikhail Bochkarev
- Sleep Laboratory, Research Department for Hypertension, Almazov National Medical Research Centre, 2 Akkuratov Street, St Petersburg 197341, Russia
| | - Yurii Sviryaev
- Research Department for Hypertension, Almazov National Medical Research Centre, 2 Akkuratov Street, St Petersburg 197341, Russia
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Quaedackers L, Pillen S, Overeem S. Recognizing the Symptom Spectrum of Narcolepsy to Improve Timely Diagnosis: A Narrative Review. Nat Sci Sleep 2021; 13:1083-1096. [PMID: 34262379 PMCID: PMC8273742 DOI: 10.2147/nss.s278046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 06/23/2021] [Indexed: 11/23/2022] Open
Abstract
Narcolepsy is a chronic sleep disorder with a strong negative impact on quality of life, especially when untreated. Diagnostic delay is a persistent problem, with obvious detrimental effects on patients. A diagnosis of narcolepsy may be delayed because of its broad symptom presentation which is much more encompassing than the classical "tetrad" of sleepiness, cataplexy, hallucinations, and sleep paralysis. Furthermore, symptoms can vary over time. Presentation of symptoms can also be markedly different between children and adults. Finally, common sleep-related comorbidities increase the risk of narcolepsy being masked by overlapping symptoms or treatment. In this review, we provide a detailed description of the broad and dynamic symptom spectrum of narcolepsy, with specific attention to the different manifestations in both adults and children. The overarching goal is to help not only sleep specialists, but general practitioners, pediatricians, and other caregivers with early recognition and prompt diagnosis of this severe but treatable disorder.
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Affiliation(s)
| | - Sigrid Pillen
- Sleep Medicine Center Kempenhaeghe, Heeze, the Netherlands
| | - Sebastiaan Overeem
- Biomedical Diagnostics Laboratory, Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
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