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Parperis K, Philippou S, Christophi CA, Constantinou A, Bargiotas P, Psarelis S. Restless leg syndrome in systemic lupus erythematosus: Associations with disease activity, quality of life and depression. Sleep Med 2024; 121:111-116. [PMID: 38959717 DOI: 10.1016/j.sleep.2024.06.020] [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: 03/14/2024] [Revised: 06/05/2024] [Accepted: 06/21/2024] [Indexed: 07/05/2024]
Abstract
OBJECTIVES The aim of this study was to determine the prevalence of restless leg syndrome (RLS) among patients with SLE, describe their clinical characteristics, examine its impact on health-related quality of life (HRQoL), and evaluate its association with depression. METHODS A total of 124 SLE patients were recruited, with data on demographics, and clinical features collected. RLS diagnosis was based on the international RLS study group criteria, while depression was assessed by the patient health questionnaire. HRQoL was assessed by a disease-specific validated questionnaire, the LupusQoL, pain intensity was examined through the pain visual analogue scale, and disease activity was evaluated via the patient global assessment. These variables were compared between SLE patients with RLS and without RLS using t-tests or Wilcoxon and the chi-square test of independence for categorical variables. A p-value ≤0.05 was considered statistically significant. RESULTS Among the SLE patients (mean age 48, 87.1 % women), 32 % had RLS. The SLE patients with RLS were found to have a longer delay in diagnosis (1 vs 0.5 years; p = 0.019) and were less likely to be employed (65 % vs 45 %, p = 0.040) compared to non-RLS patients. In addition, RLS patients were more likely to have coexisting Major Depressive Disorder (MDD) (p = 0.019), higher levels of pain (p = 0.006) and disease activity based on patient global assessment (p = 0.014). Further, most of the domains of LupusQoL were significantly lower in the RLS patients group suggesting a worse HRQoL. CONCLUSION RLS was present in one-third of the SLE cohort, significantly impairing HRQoL and correlating with depression, higher pain, and increased disease activity. These findings underscore the importance of early RLS detection and management in SLE patients.
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Affiliation(s)
- Konstantinos Parperis
- University of Cyprus Medical School, Nicosia, Cyprus; Nicosia General Hospital, Department of Rheumatology, Nicosia, Cyprus.
| | | | | | | | | | - Savvas Psarelis
- Nicosia General Hospital, Department of Rheumatology, Nicosia, Cyprus
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Park KM, Kim KT, Lee DA, Cho YW. Alterations in functional brain connectivity following treatment for restless legs syndrome: The role of symptom improvement in restoring functional connectivity. J Sleep Res 2024:e14303. [PMID: 39098007 DOI: 10.1111/jsr.14303] [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: 05/06/2024] [Revised: 06/30/2024] [Accepted: 07/22/2024] [Indexed: 08/06/2024]
Abstract
The pathophysiology of restless legs syndrome (RLS) remains incompletely understood. Although several studies have investigated the alterations of brain connectivity as one of the pathophysiological mechanisms of RLS, there are only few reports on functional connectivity changes after RLS treatment. Forty-nine patients with newly diagnosed RLS and 50 healthy controls were prospectively enrolled. The patients underwent resting-state functional magnetic resonance imaging (rs-fMRI) at baseline, and 39 patients underwent follow-up rs-fMRI, 3 months after treatment with pramipexole or pregabalin. Patients were divided into good or poor medication response groups. Functional brain connectivity was analysed using rs-fMRI and graph theoretical analysis. Significant differences in functional connectivity were observed between the RLS patients and healthy controls. The average path length, clustering coefficient, transitivity, and local efficiency were lower (2.02 vs. 2.30, p < 0.001; 0.45 vs. 0.56, p < 0.001; 3.08 vs. 4.21, p < 0.001; and 0.71 vs. 0.76, p < 0.001, respectively) and the global efficiency was higher (0.53 vs. 0.50, p < 0.001) in patients with RLS than in healthy controls. Differences in functional connectivity at the global level were also observed between post- and pre-treatment RLS patients who showed a good medication response. Transitivity in the post-treatment group was higher than that in the pre-treatment group (3.22 vs. 3.04, p = 0.007). Global efficiency was positively correlated with RLS severity (r = 0.377, p = 0.007). This study demonstrates that RLS is associated with distinct alterations in brain connectivity, which can be partially normalised following symptom management. These findings suggest that therapeutic interventions for RLS modulate brain function, emphasising the importance of symptom-focussed treatment in managing RLS.
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Affiliation(s)
- Kang Min Park
- Department of Neurology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea
| | - Keun Tae Kim
- Department of Neurology, Keimyung University School of Medicine, Daegu, South Korea
| | - Dong Ah Lee
- Department of Neurology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea
| | - Yong Won Cho
- Department of Neurology, Keimyung University School of Medicine, Daegu, South Korea
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Earley CJ, García-Borreguero D, Falone M, Winkelman JW. Clinical efficacy and safety of intravenous ferric carboxymaltose for treatment of restless legs syndrome: a multicenter, randomized, placebo-controlled clinical trial. Sleep 2024; 47:zsae095. [PMID: 38625730 DOI: 10.1093/sleep/zsae095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 11/03/2023] [Indexed: 04/17/2024] Open
Abstract
STUDY OBJECTIVES Iron therapy is associated with improvements in restless legs syndrome (RLS). This multicenter, randomized, double-blind study evaluated the effect of intravenous ferric carboxymaltose (FCM) on RLS. METHODS A total of 209 adult patients with a baseline International RLS (IRLS) score ≥ 15 were randomized (1:1) to FCM (750 mg/15 mL) or placebo on study days 0 and 5. Ongoing RLS medication was tapered starting on Day 5, with the goal of discontinuing treatment or achieving the lowest effective dose. Co-primary efficacy endpoints were changed from baseline in IRLS total score and the proportion of patients rated as much/very much improved on the Clinical Global Impression (CGI)-investigator (CGI-I) scale at day 42 in the "As-Treated" population. RESULTS The "As-Treated" population comprised 107 FCM and 101 placebo recipients; 88 (82.2%) and 68 (67.3%), respectively, completed the day 42 assessment. The IRLS score reduction was significantly greater with FCM versus placebo: least-squares mean (95% confidence interval [CI]) -8.0 (-9.5, -6.4) versus -4.8 (-6.4, -3.1); p = .0036. No significant difference was observed in the proportion of FCM (35.5%) and placebo (28.7%) recipients with a CGI-I response (odds ratio 1.37 [95% CI: 0.76, 2.47]; p = .2987). Fewer patients treated with FCM (32.7%) than placebo (59.4%) received RLS interventions between day 5 and study end (p = .0002). FCM was well tolerated. CONCLUSIONS The IRLS score improved with intravenous FCM versus placebo, although the combination of both co-primary endpoints was not met. Potential methodological problems in the study design are discussed.
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Affiliation(s)
| | | | - Mark Falone
- American Regent, Inc., Clinical Research and Development, Shirley, NY, USA
| | - John W Winkelman
- Departments of Psychiatry and Neurology, Massachusetts General Hospital, Boston, MA, USA
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Perger E, Silvestri R, Bonanni E, Di Perri MC, Fernandes M, Provini F, Zoccoli G, Lombardi C. Gender medicine and sleep disorders: from basic science to clinical research. Front Neurol 2024; 15:1392489. [PMID: 39050129 PMCID: PMC11267506 DOI: 10.3389/fneur.2024.1392489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 06/24/2024] [Indexed: 07/27/2024] Open
Abstract
Several pivotal differences in sleep and sleep disorders are recognized between women and men. This is not only due to changes in hormonal balance during women's reproductive life, such as in pregnancy and menopause. Women are more likely to report insomnia and non-specific symptoms of apneas, such as fatigue or mood disturbance, compared to men. Thus, it is important for clinicians and researchers to take sex and gender differences into account when addressing sleep disorders in order to acknowledge the biology unique to women. We present a narrative review that delves into the primary sleep disorders, starting from basic science, to explore the impact of gender differences on sleep and the current status of research on women's sleep health.
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Affiliation(s)
- Elisa Perger
- Istituto Auxologico Italiano, IRCCS, Sleep Disorders Center and Department of Cardiovascular, Neural and Metabolic Sciences, San Luca Hospital, Milan, Italy
| | - Rosalia Silvestri
- Sleep Medicine Center, Neurophysiopathology and Movement Disorders Unit, Department of Clinical and Experimental Medicine, University of Messina, AOU “G. Martino”, Messina, Italy
| | - Enrica Bonanni
- Sleep Disorder Center, Neurology Unit, Azienda Ospedaliero-Universitaria Pisana and Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Maria Caterina Di Perri
- Sleep Medicine Center, Neurophysiopathology and Movement Disorders Unit, Department of Clinical and Experimental Medicine, University of Messina, AOU “G. Martino”, Messina, Italy
| | - Mariana Fernandes
- Epilepsy Centre, Department of Systems Medicine, University of Rome “Tor Vergata”, Rome, Italy
- Neurology Unit, University Hospital of Rome “Tor Vergata”, Rome, Italy
| | - Federica Provini
- IRCCS, Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
- Department of Biomedical and Neuromotor Sciences, Università di Bologna, Bologna, Italy
| | - Giovanna Zoccoli
- Department of Biomedical and Neuromotor Sciences, Università di Bologna, Bologna, Italy
| | - Carolina Lombardi
- Istituto Auxologico Italiano, IRCCS, Sleep Disorders Center and Department of Cardiovascular, Neural and Metabolic Sciences, San Luca Hospital, Milan, Italy
- Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
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Sunwoo JS, Yang KI, Park J, Kim H, Kim JH, Hong SB. Lifestyle factors associated with symptoms suggestive of restless legs syndrome in Korean adolescents. Sleep Med 2024; 119:276-280. [PMID: 38718596 DOI: 10.1016/j.sleep.2024.05.001] [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: 01/26/2024] [Revised: 04/24/2024] [Accepted: 05/01/2024] [Indexed: 06/18/2024]
Abstract
OBJECTIVE Restless legs syndrome (RLS) is a common sleep disorder among adolescents. This study aimed to investigate the lifestyle factors and sleep disturbances associated with the symptoms suggestive of RLS in Korean adolescents. METHODS In this cross-sectional study, we investigated a total of 25,789 adolescents (mean age, 15.8 ± 1.7 years; male, 48.5 %). The presence of symptoms suggestive of RLS was assessed with a single question about RLS in the Global Sleep Assessment Questionnaire. We performed multiple logistic regression analysis to estimate the odds ratios (ORs) and 95 % confidence intervals (CIs) of lifestyle factors and sleep disturbances that were independently associated with adolescent RLS. RESULTS The prevalence of RLS-suggestive symptoms was 5.1 % among adolescents. After adjustment, lifestyle factors associated with symptoms suggestive of RLS were occasional alcohol consumption (OR, 1.245; 95 % CI, 1.006-1.540) and proneness to Internet addiction (OR, 1.027; 95 % CI, 1.021-1.033). Bedtime behaviors associated with RLS-suggestive symptoms were sleeping with a doll or pet (OR, 1.194; 95 % CI, 1.032-1.381) and sleeping with a TV or radio on (OR, 1.366; 95 % CI, 1.156-1.614). Male sex, frequent snoring and witnessed apnea, perceived sleep insufficiency, excessive daytime sleepiness were also associated with RLS-suggestive symptoms in adolescents. CONCLUSIONS Adolescents with symptoms suggestive of RLS were associated with different lifestyle factors compared to adults with RLS. Further research is needed to determine the clinical implications of lifestyle factors in adolescent RLS.
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Affiliation(s)
- Jun-Sang Sunwoo
- Department of Neurology, Kangbuk Samsung Hospital, Seoul, South Korea
| | - Kwang Ik Yang
- Sleep Disorders Center, Department of Neurology, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan, South Korea.
| | - Jongkyu Park
- Sleep Disorders Center, Department of Neurology, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan, South Korea
| | - Hyeyun Kim
- Sleep Medicine Research Center, Department of Neurology, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, South Korea
| | - Jee Hyun Kim
- Department of Neurology, Ewha Womans University Seoul Hospital, Ewha Womans University, College of Medicine, Seoul, South Korea
| | - Seung Bong Hong
- Department of Neurology, Samsung Medical Center, Samsung Biomedical Research Institute, SAIHST, Sungkyunkwan University School of Medicine, Seoul, South Korea.
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Paul AM, Salas RE. Insomnia. Prim Care 2024; 51:299-310. [PMID: 38692776 DOI: 10.1016/j.pop.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Sleep significantly impacts health. Insomnia, characterized by difficulty with sleep onset, maintenance, and subsequent daytime symptoms, is increasingly prevalent and increases the risk of other medical comorbidities. The pathophysiology involves hyperarousal during non-REM sleep and altered sleep homeostasis. The 3P model explains the development and persistence of insomnia. Assessment is primarily clinical and based on appropriate history while distinguishing from other sleep disorders. "Somnomics" suggests a personalized approach to management. Cognitive behavioral therapy for insomnia is the first-line treatment in addition to other nonpharmacological strategies. Medications are a secondary option with weak supporting evidence.
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Affiliation(s)
- Ashley M Paul
- Department of Neurology, Johns Hopkins University, School of Medicine, 600 N. Wolfe Street, Meyer 6-119, Baltimore, MD 21287, USA.
| | - Rachel E Salas
- Department of Neurology, Johns Hopkins University, School of Medicine, 600 N. Wolfe Street, Meyer 6-119, Baltimore, MD 21287, USA
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Pellitteri G, Versace S, Merlino G, Nilo A, Gigli GL, Valente M. A comprehensive update on the ADMET considerations for α2δ calcium channel ligand medications for treating restless legs syndrome. Expert Opin Drug Metab Toxicol 2024; 20:133-142. [PMID: 38482850 DOI: 10.1080/17425255.2024.2329738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 03/08/2024] [Indexed: 03/26/2024]
Abstract
INTRODUCTION Restless legs syndrome/Willis-Ekbom disease (RLS/WED) is a sleep-related sensory-motor disorder associated with poor sleep quality and impaired daily functioning. In patients affected by chronic RLS/WED, a pharmacological therapy is recommended. International guidelines suggest to start the treatment with a α2δ calcium channel ligand in most cases, unless contraindicated. AREAS COVERED The present review is based on an extensive Internet and PubMed search from 1986 to 2024. Our purpose is to describe the absorption, distribution, metabolism, and toxicology (ADMET) of the α2δ ligands, with common consideration for the therapeutic class, specificities of different compounds, efficacy, and safety in relation to other treatment options. EXPERT OPINION α2δ ligands are quite similar in their ADMET profiles, sharing most of the pharmacokinetics and potential adverse effects. However, we highlight the linear kinetic of gabapentin enacarbil and pregabalin, differently from gabapentin. α2δ ligands are safe and effective for the treatment of RLS/WED. Additional benefits can be obtained in comorbid insomnia, chronic pain syndromes, history of impulse control disorder, and comorbid anxiety. The use of α2δ ligands is associated with poor risk of augmentation. We still need new long-term safe and effective treatments, which could be developed along with our knowledge of RLS/WED pathophysiology.
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Affiliation(s)
- Gaia Pellitteri
- Clinical Neurology Unit, Udine University Hospital, Udine, Italy
| | - Salvatore Versace
- Clinical Neurology Unit, Udine University Hospital, Udine, Italy
- Department of Medicine (DMED), University of Udine, Udine, Italy
| | - Giovanni Merlino
- Clinical Neurology Unit, Udine University Hospital, Udine, Italy
| | - Annacarmen Nilo
- Clinical Neurology Unit, Udine University Hospital, Udine, Italy
- Department of Medicine (DMED), University of Udine, Udine, Italy
| | - Gian Luigi Gigli
- Department of Medicine (DMED), University of Udine, Udine, Italy
| | - Mariarosaria Valente
- Clinical Neurology Unit, Udine University Hospital, Udine, Italy
- Department of Medicine (DMED), University of Udine, Udine, Italy
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Kim J, Kim JR, Park HR, Joo EY. Sex-specific patterns of discomfort in patients with restless legs syndrome. J Clin Sleep Med 2024; 20:253-259. [PMID: 37858283 PMCID: PMC10835774 DOI: 10.5664/jcsm.10848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 09/23/2023] [Accepted: 09/25/2023] [Indexed: 10/21/2023]
Abstract
STUDY OBJECTIVES Sex differences in the prevalence of restless legs syndrome (RLS) have been reported, with a higher prevalence in women than in men. However, sex differences in clinical presentation remain unclear. We aimed to investigate the phenotypic differences in patients with RLS between sexes by comparing clinical presentations, iron status, polysomnographic parameters, and treatment. METHODS We retrospectively evaluated 614 patients (225 men, 389 women) diagnosed with RLS. To enhance the robustness of the study, an age-matched control group of 179 men and 286 women without sleep disorders was also included. Information on demographics and sleep-related questionnaires were collected. Iron status was evaluated using blood samples, and polysomnography was performed to evaluate periodic leg movements and comorbid sleep disorders. RESULTS Our analysis revealed no sex difference in the severity of RLS but a difference in the pattern of symptoms. Women had more frequent symptoms of pain and awakening during sleep, while men had more common motor symptoms (both self-reported symptoms and periodic leg movement on polysomnography). Women with RLS also had lower iron parameters and received more frequent iron supplementation therapy than men. In contrast to women with RLS, who presented higher sleep disturbances and depressive mood, men with RLS had a higher risk of comorbidities such as hypertension and cardiovascular disease. These sex differences were notably more pronounced than in the control group. CONCLUSIONS This study suggests that sex differences exist in RLS phenotypes, and clinicians should consider these differences for treatment. CITATION Kim J, Kim JR, Park HR, Joo EY. Sex-specific patterns of discomfort in patients with restless legs syndrome. J Clin Sleep Med. 2024;20(2):253-259.
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Affiliation(s)
- Jinhee Kim
- Department of Neurology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae Rim Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Hea Ree Park
- Department of Neurology, Inje University College of Medicine, Ilsan-Paik Hospital, Goyang, Republic of Korea
| | - Eun Yeon Joo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Mislu E, Assalfew B, Arage MW, Chane F, Hailu T, Tenaw LA, Kidie AA, Kumsa H. Prevalence and factors associated with restless legs syndrome among pregnant women in middle-income countries: a systematic review and meta-analysis. Front Med (Lausanne) 2023; 10:1326337. [PMID: 38188334 PMCID: PMC10771314 DOI: 10.3389/fmed.2023.1326337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 11/28/2023] [Indexed: 01/09/2024] Open
Abstract
Introduction Restless legs syndrome (RLS) is a debilitating condition characterized by uncomfortable sensations in the legs, typically occurring during periods of rest or sleep. It is more prevalent during pregnancy and is linked to sleep disturbances, diminished quality of life, and pregnancy complications. However, previous studies yielded inconsistent findings among pregnant women in middle-income countries. Consequently, this systematic review and meta-analysis sought to determine the pooled prevalence of restless legs syndrome and its associated factors in these populations. Method A systematic review and meta-analysis was conducted on published studies from middle-income countries until May 2023. The review strictly adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Relevant search terms were used to search for studies in PubMed, MEDLINE, EMBASE, and Google Scholar. Data extraction was performed using the Joanna Briggs Institute tool for prevalence studies. The meta-analysis was conducted using STATA 17 software, and heterogeneity was assessed using the I2 test, while publication bias was evaluated using Egger's test. Forest plots were also used to present the pooled prevalence and odds ratio (OR) with a 95% confidence interval (CI) using the random-effects model. Result This review included 22 studies from nine countries with a total of 17, 580 study participants. The overall pooled prevalence of RLS among pregnant women in middle-income countries was 13.82% (95% CI: 13.31, 14.32), and having low hemoglobin level (AOR: 1.68, 95% CI: 1.29, 2.18), history of RLS (AOR: 7.54, 95% CI: 3.02, 18.79), muscle cramps (AOR: 3.58, 95% CI: 1.21, 10.61), excessive day time sleepiness (AOR: 4.02, 95% CI: 1.34, 12.04), preeclampsia (AOR: 2.06, 95% CI: 1.28, 3.30), and taking prophylactic iron supplementation (AOR: 0.59, 95% CI: 0.50, 0.69) were the identified factors associated with it. Conclusion Generally, nearly one in every eight pregnant women in middle-income countries develop restless legs syndrome during pregnancy. Having low hemoglobin level, a history of RLS, muscle cramps, excessive daytime sleepiness, preeclampsia, and taking prophylactic iron supplementation were the identified factors associated with it. These findings underscore the importance of addressing the identified factors associated with RLS in order to effectively mitigate its occurrence among pregnant women.
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Affiliation(s)
- Esuyawkal Mislu
- School of Midwifery, College of Health Science, Woldia University, Woldia, Ethiopia
| | - Betel Assalfew
- School of Midwifery, College of Health Science, Woldia University, Woldia, Ethiopia
| | | | - Fiker Chane
- School of Midwifery, College of Health Science, Woldia University, Woldia, Ethiopia
| | - Tilahun Hailu
- School of Public Health, College of Health Science, Woldia University, Woldia, Ethiopia
| | - Lebeza Alemu Tenaw
- School of Public Health, College of Health Science, Woldia University, Woldia, Ethiopia
| | - Atitegeb Abera Kidie
- School of Public Health, College of Health Science, Woldia University, Woldia, Ethiopia
| | - Henok Kumsa
- School of Midwifery, College of Health Science, Woldia University, Woldia, Ethiopia
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Duran M, Aykaç S, Eliaçik S. Comparative assessment of choroidal thickness and choroidal vascularity index in patients with restless legs syndrome. Photodiagnosis Photodyn Ther 2023; 43:103701. [PMID: 37429457 DOI: 10.1016/j.pdpdt.2023.103701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/14/2023] [Accepted: 07/07/2023] [Indexed: 07/12/2023]
Abstract
BACKGROUND Increased sympathetic activity has been emphasized in the pathophysiology of restless legs syndrome (RLS). This study aims to evaluate the choroidal thickness (CT) and choroidal vascularity index (CVI) values of individuals with RLS. METHODS A total of 60 volunteers, 30 individuals with RLS and 30 healthy individuals, were included in the study. The central macular thickness, subfoveal CT, and the CTs 1000 μm away from the fovea in the temporal and nasal regions were measured by optical coherence tomography. Total choroidal area (TCA), luminal area (LA) and stromal area (SA) were calculated using the binarization method. CVI was calculated as the ratio of lumen area to total choroidal area (LA/TCA). RESULTS There was no significant difference between the participants in terms of age, gender, spherical equivalent, intraocular pressure, and axial length (p>0.05). The mean LA/SA was 1.56%±0.05 in RLS group and 1.99%±0.28 in the control group. The mean CVI was 0.64%±0.02% in RLS group and 0.66%±0.03 in the control group. There was no significant difference between the groups in terms of CT, TCA and LA values. There were significant differences between the groups in SA, LA/SA and CVI values (p = 0.017, p<0.001, and p = 0.004, respectively). CONCLUSION SA values were significantly higher in RLS group than in control group. The LA/SA and CVI values were significantly lower in RLS group than in control group. These findings suggests that there is vascular narrowing due to sympathetic overactivity in RLS patients.
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Affiliation(s)
- Mustafa Duran
- Department of Ophthalmology, Faculty of Medicine, Hitit University, Çorum 019040, Turkey.
| | - Serdar Aykaç
- Department of Neurology, Faculty of Medicine, Hitit University, Çorum, Turkey
| | - Sinan Eliaçik
- Department of Neurology, Faculty of Medicine, Hitit University, Çorum, Turkey
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Aljarallah S, Alkhawajah N, Aldosari O, Alhuqbani M, Alqifari F, Alkhuwaitir B, Aldawood A, Alshenawy O, BaHammam AS. Restless leg syndrome in multiple sclerosis: a case-control study. Front Neurol 2023; 14:1194212. [PMID: 37404942 PMCID: PMC10315471 DOI: 10.3389/fneur.2023.1194212] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 06/06/2023] [Indexed: 07/06/2023] Open
Abstract
Objectives This study assessed the prevalence of restless leg syndrome (RLS) among patients with multiple sclerosis (pwMS) and the association between RLS and MS disease duration, sleep disturbance, and daytime fatigue. Methods In this cross-sectional study, we interviewed 123 patients via phone calls using preset questionnaires containing the International Restless Legs Syndrome Study Group (IRLSSG) diagnostic criteria, Pittsburgh Sleep Quality Index (PSQI), and Fatigue Severity Scale (FSS) diagnostic criteria validated in both Arabic and English. The prevalence of RLS in MS was compared to a group of healthy controls. Results The prevalence of RLS in pwMS, defined by meeting all four requirements included in the IRLSSG diagnostic criteria, was 30.3% compared to 8.3% in the control group. About 27.3% had mild RLS, 36.4% presented with moderate, and the remaining had severe or very severe symptoms. Patients with MS who experience RLS had a 2.8 times higher risk of fatigue compared to pwMS without RLS. pwMS with RLS had worse sleep quality, with a mean difference of 0.64 in the global PSQI score. Sleep disturbance and latency had the most significant impact on sleep quality. Conclusion The prevalence of RLS among MS patients was significantly higher compared to the control group. We recommend educating neurologists and general physicians to increase their awareness of the increasing prevalence of RLS and its association with fatigue and sleep disturbance in patients with MS.
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Affiliation(s)
- Salman Aljarallah
- College of Medicine, King Saud University, Riyadh, Saudi Arabia
- Department of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Nuha Alkhawajah
- College of Medicine, King Saud University, Riyadh, Saudi Arabia
- Department of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Omar Aldosari
- College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | | | - Faisal Alqifari
- College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | | | | | - Omar Alshenawy
- College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed S. BaHammam
- The University Sleep Disorders Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia
- National Plan for Science and Technology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
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Park KM, Kim KT, Lee DA, Cho YW. Alterations of the thalamic nuclei volumes and intrinsic thalamic network in patients with restless legs syndrome. Sci Rep 2023; 13:4415. [PMID: 36932255 PMCID: PMC10023689 DOI: 10.1038/s41598-023-31606-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
We aimed to investigate the alterations of thalamic nuclei volumes and intrinsic thalamic network in patients with primary restless legs syndrome (RLS) compared to healthy controls. Seventy-one patients with primary RLS and 55 healthy controls were recruited. They underwent brain MRI using a three-tesla MRI scanner, including three-dimensional T1-weighted images. The intrinsic thalamic network was determined using graph theoretical analysis. The right and left whole thalamic volumes, and the right pulvinar inferior, left ventral posterolateral, left medial ventral, and left pulvinar inferior nuclei volumes in the patients with RLS were lower than those in healthy controls (0.433 vs. 0.447%, p = 0.034; 0.482 vs. 0.502%, p = 0.016; 0.013 vs. 0.015%, p = 0.031; 0.062 vs. 0.065%, p = 0.035; 0.001 vs. 0.001%, p = 0.034; 0.018 vs. 0.020%, p = 0.043; respectively). There was also a difference in the intrinsic thalamic network between the groups. The assortative coefficient in patients with RLS was higher than that in healthy controls (0.0318 vs. - 0.0358, p = 0.048). We demonstrated the alterations of thalamic nuclei volumes and intrinsic thalamic network in patients with RLS compared to healthy controls. These changes might be related to RLS pathophysiology and suggest the pivotal role of the thalamus in RLS symptoms.
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Affiliation(s)
- Kang Min Park
- Department of Neurology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Keun Tae Kim
- Department of Neurology, Keimyung University School of Medicine, 1035 Dalgubeoldae-ro, Dalseo-gu, Daegu, 42601, Korea
| | - Dong Ah Lee
- Department of Neurology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Yong Won Cho
- Department of Neurology, Keimyung University School of Medicine, 1035 Dalgubeoldae-ro, Dalseo-gu, Daegu, 42601, Korea.
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Laleli Koc B, Elmas B, Tugrul Ersak D, Erol SA, Kara O, Sahin D. Evaluation of Serum Selenium Level, Quality of Sleep, and Life in Pregnant Women With Restless Legs Syndrome. Biol Trace Elem Res 2023; 201:1143-1150. [PMID: 36255554 DOI: 10.1007/s12011-022-03447-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 10/04/2022] [Indexed: 02/07/2023]
Abstract
Restless legs syndrome (RLS) is a multifactorial disease that patients describe as restlessness in their legs, which creates a desire to move their legs, especially in the evening and at rest. This study aims to investigate serum selenium levels in RLS and document the quality of sleep and life in pregnant women with RLS according to International Restless Legs Syndrome Study Group (IRLSSG) diagnostic criteria. Thirty-eight moderate to severe RLS patients with pregnancy at 38-41 weeks of gestation were determined as the case group, and 38 women with healthy gestational age-matched pregnancies were determined as the control group. Maternal serum selenium levels were compared between the RLS case group and the group of healthy pregnant women at the time of hospitalization for delivery. The Pittsburgh Sleep Quality Index (PSQI) and The Quality of Life Scale (SF-36) were applied to the patients. The mean selenium level (µg/L) was statistically significantly lower in the RLS group (53.24 ± 10.28), compared to the healthy pregnant population (58.95 ± 11.29) (P = 0.024). The PSQI score was significantly higher in the RLS case group (P = 0.033). Especially sleep efficiency (P = 0.018) and daytime dysfunction (P = 0.032) sub-parameters were affected. The SF-36 questionnaire was examined and a significant difference was detected between the two groups in role emotional (P = 0.026), social functioning (P = 0.023), and body pain (P = 0.044) sub-parameters. Serum selenium level was significantly lower, the sleep quality of the RLS group was impaired and their quality of life was affected in pregnant women with RLS. Further studies are needed to determine whether selenium replacement in pregnant women with RLS is feasible or not.
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Affiliation(s)
- Bergen Laleli Koc
- Department of Obstetrics and Gynecology, Turkish Ministry of Health Ankara City Hospital, Ankara, Turkey.
| | - Burak Elmas
- Department of Obstetrics and Gynecology, Turkish Ministry of Health Ankara City Hospital, Ankara, Turkey
| | - Duygu Tugrul Ersak
- Department of Obstetrics and Gynecology, Turkish Ministry of Health Ankara City Hospital, Ankara, Turkey
| | - Seyit Ahmet Erol
- Department of Obstetrics and Gynecology, Perinatology, Turkish Ministry of Health, Konya City Hospital, Konya, Turkey
| | - Ozgur Kara
- Department of Obstetrics and Gynecology, Turkish Ministry of Health Ankara City Hospital, Ankara, Turkey
| | - Dilek Sahin
- Department of Obstetrics and Gynecology, Turkish Ministry of Health, Ankara City Hospital, University of Health Sciences, Ankara, Turkey
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Restless Legs Syndrome and Periodic Limb Movements of Sleep: From Neurophysiology to Clinical Practice. J Clin Neurophysiol 2023; 40:215-223. [PMID: 36872500 DOI: 10.1097/wnp.0000000000000934] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023] Open
Abstract
SUMMARY This article summarizes restless legs syndrome (RLS), periodic limb movements of sleep, and periodic limb movement disorder. RLS is a common sleep disorder with a prevalence of 5% to 15% in the general population. RLS can present in childhood, and incidence increases with age. RLS can be idiopathic or secondary to iron deficiency, chronic renal failure, peripheral neuropathy, and medications such as antidepressants (with higher rates for mirtazapine and venlafaxine, while bupropion may reduce symptoms at least in the short term), dopamine antagonists (neuroleptic antipsychotic agents and antinausea medications), and possibly antihistamines. Management includes pharmacologic agents (dopaminergic agents, alpha-2 delta calcium channel ligands, opioids, benzodiazepines) and nonpharmacologic therapies (iron supplementation, behavioral management). Periodic limb movements of sleep are an electrophysiologic finding commonly accompanying RLS. On the other hand, most individuals with periodic limb movements of sleep do not have RLS. The clinical significance of the movements has been argued. Periodic limb movement disorder is a distinct sleep disorder that arises in individuals without RLS and is a diagnosis of exclusion.
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15
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Wong SG, Vorakunthada Y, Lee-Iannotti J, Johnson KG. Sleep-related motor disorders. HANDBOOK OF CLINICAL NEUROLOGY 2023; 195:383-397. [PMID: 37562879 DOI: 10.1016/b978-0-323-98818-6.00012-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Sleep-related motor disorders include non-rapid-eye movement (NREM) sleep parasomnias, rapid-eye movement (REM), sleep parasomnias including REM sleep behavior disorder (RBD), isolated motor phenomena in sleep, and periodic limb movement disorder. Restless legs syndrome (RLS) occurs while awake but is closely related to sleep and has a circadian pattern. The pontine sublaterodorsal tegmental nucleus has an important role in aligning motor control with sleep states, and dysfunction in this region can explain motor activities including cataplexy and loss of REM atonia seen in REM sleep behavior disorder. This chapter begins with a review of motor control in sleep. The rest of the chapter summarizes the clinical presentation, epidemiology, differential and treatment of NREM, REM, and isolated sleep-related motor disorders as well as restless legs syndrome.
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Affiliation(s)
- Stephanie G Wong
- Department of Medicine, University of Arizona College of Medicine, Phoenix, AZ, United States
| | - Yuttiwat Vorakunthada
- Department of Medicine, University of Arizona College of Medicine, Phoenix, AZ, United States
| | - Joyce Lee-Iannotti
- Department of Medicine, University of Arizona College of Medicine, Phoenix, AZ, United States
| | - Karin G Johnson
- Department of Neurology, University of Massachusetts Chan School of Medicine-Baystate, Springfield, MA, United States; Institute for Healthcare Delivery and Population Science, University of Massachusetts Chan School of Medicine-Baystate, Springfield, MA, United States.
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A Narrative Review of the Lesser Known Medications for Treatment of Restless Legs Syndrome and Pathogenetic Implications for Their Use. Tremor Other Hyperkinet Mov (N Y) 2023; 13:7. [PMID: 36873914 PMCID: PMC9983500 DOI: 10.5334/tohm.739] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 02/11/2023] [Indexed: 03/06/2023] Open
Abstract
Background There are several well-known treatments for Restless Legs Syndrome (RLS), including dopamine agonists (pramipexole, ropinirole, rotigotine), anticonvulsants (gabapentin and its analogs, pregabalin), oral or intravenous iron, opioids and benzodiazepines. However, in clinical practice, treatment is sometimes limited due to incomplete response or side effects and it is necessary to be aware of other treatment options for RLS, which is the purpose of this review. Methods We performed a narrative review detailing all of the lesser known pharmacological treatment literature on RLS. The review purposefully excludes well-established, well-known treatments for RLS which are widely accepted as treatments for RLS in evidence-based reviews. We also have emphasized the pathogenetic implications for RLS of the successful use of these lesser known agents. Results Alternative pharmacological agents include clonidine which reduces adrenergic transmission, adenosinergic agents such as dipyridamole, glutamate AMPA receptor blocking agents such as perampanel, glutamate NMDA receptor blocking agents such as amantadine and ketamine, various anticonvulsants (carbamazepine/oxcarbazepine, lamotrigine, topiramate, valproic acid, levetiracetam), anti-inflammatory agents such as steroids, as well as cannabis. Bupropion is also a good choice for the treatment of co-existent depression in RLS because of its pro-dopaminergic properties. Discussion Clinicians should first follow evidence-based review recommendations for the treatment of RLS but when the clinical response is either incomplete or side effects are intolerable other options can be considered. We neither recommend nor discourage the use of these options, but leave it up to the clinician to make their own choices based upon the benefit and side effect profiles of each medication. Summary Clinicians should first follow evidence-based reviews for RLS but when response is incomplete and side effects intolerable, other medications can be considered. We do not make a recommendation on these options but leave it up to the clinician to make their own choice based upon the benefit and side effect profiles of each medication.
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Saber WK, Almuallim AR, Algahtani R. Restless Legs Syndrome and the Use of Antipsychotic Medication: An Updated Literature Review. Cureus 2022; 14:e27821. [PMID: 36134065 PMCID: PMC9481228 DOI: 10.7759/cureus.27821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2022] [Indexed: 11/12/2022] Open
Abstract
Restless legs syndrome or Willis-Ekbom disease (RLS/WED) is a sleep-related movement disorder characterized by an urge to move the legs. This impulse is usually accompanied by an uncomfortable and unpleasant sensation in the legs, which worsens at night and during periods of inactivity and is relieved by movement. Several studies in the literature reported the association between RLS and different antipsychotic medications. with Olanzapine, Quetiapine, and Clozapine identified as the most common causes. The literature suggests that the development of RLS in antipsychotic users may be attributed to the inhibition of dopaminergic neurotransmission or the impact of antipsychotics on iron metabolism. Diagnosing antipsychotic-induced RLS remains a substantial challenge in clinical practice, with challenges in the management of this condition also being widely reported in the current literature. In this article, we will review the evidence suggesting the association between RLS and the use of antipsychotic medications, differentiate between RLS and other movement disorders, and give a brief review of the pathophysiology, diagnosis, and management of RLS and its challenges among psychotic patients.
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Overlapping features of restless legs syndrome and growing pains in Turkish children and adolescents. Brain Dev 2022; 44:372-379. [PMID: 35221168 DOI: 10.1016/j.braindev.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/01/2022] [Accepted: 02/13/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND Restless legs syndrome (RLS) and growing pains (GPs) share many common features and are sometimes overlapping diagnoses. The present study aims to investigate the shared features of patients with RLS, classified based on the 2013 diagnostic criteria of International Restless Legs Syndrome Study group and of patients with GPs, diagnosed based on the combined criteria proposed in 2013. METHODS A cross-sectional population study was conducted in 7 Istanbul schools, which were selected randomly. A total of 4565 (56.1% female) children aged 9 to 18 years were included. In the first stage, candidates of RLS and GPs were identified based on 2 separate questionnaires, whose diagnoses were confirmed by a second survey applied to them under parental supervision. RESULTS Out of 192 children (65.6% female) diagnosed as definite RLS (yearly prevalence: 4.2%), 30 (15.6%) reported bilateral leg muscle pain localized typical regions for GPs, which started <13 years of age in 17 children. An urge to move the legs to relieve unpleasant sensations or pain was present in 39.3% of 140 children (64.3% female) classified as GPs (yearly prevalence: 3.1%). Occurrence of symptoms at rest or when lying down was present in 36.4% of GPs children and relief by gross movements was in 21.4% children. Only 12 patients (9 with definite RLS and 3 with GPs) (0.03% of total cohort) were eligible for overlapping diagnosis of GPs and RLS. CONCLUSION Although a considerable number of patients with RLS and GPs share some clinical features, a combined phenotype is very rare.
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Treatment initiation and utilization patterns of pharmacotherapies for early-onset idiopathic restless legs syndrome. Sleep Med 2022; 96:70-78. [DOI: 10.1016/j.sleep.2022.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/27/2022] [Accepted: 05/06/2022] [Indexed: 11/23/2022]
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Grandner MA. Sleep, Health, and Society. Sleep Med Clin 2022; 17:117-139. [DOI: 10.1016/j.jsmc.2022.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Sawatari H, Yoshimura C, Amagase H, Takewaka M, Nakashima K, Imaoka C, Obama H, Miyanaga N, Ando SI. Relationship between Restless legs syndrome associated symptoms and presence of depression during pregnancy. Women Health 2022; 62:265-271. [DOI: 10.1080/03630242.2022.2055698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Hiroyuki Sawatari
- Department of Perioperative and Critical Care Management, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Chikara Yoshimura
- Department of Preventive Medicine and Public Health, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | | | | | | | | | - Hirotsugu Obama
- Department of Obstetrics and Gynecology, Izuchi Hospital, Fukuoka, Japan
| | | | - Shin-ichi Ando
- Sleep Apnea Center, Kyushu University Hospital, Fukuoka, Japan
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22
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Chronic inflammation markers and cytokine-specific autoantibodies in Danish blood donors with restless legs syndrome. Sci Rep 2022; 12:1672. [PMID: 35102231 PMCID: PMC8803845 DOI: 10.1038/s41598-022-05658-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 01/17/2022] [Indexed: 12/16/2022] Open
Abstract
Restless Legs Syndrome (RLS) is a neurological sensorimotor disorder negatively impacting sufferers’ quality of sleep and health-related quality of life. The pathophysiology of RLS is poorly understood and research focusing on the link between RLS and inflammation has been limited. Our study aimed to investigate whether chronic inflammation markers C-reactive protein (CRP) and soluble urokinase-type plasminogen activator receptor (suPAR), as well plasma levels of five different cytokine-specific autoantibodies (c-aAb), i.e. modulators of inflammation, associate with RLS in otherwise healthy individuals. CRP, suPAR and c-aAb were measured in plasma samples of participants from the Danish Blood Donor Study in 2010. Returning donors between 2015 and 2018 completed the validated Cambridge-Hopkins RLS-questionnaire for RLS assessment, resulting in datasets with RLS assessment and values for CRP (N = 3564), suPAR (N = 2546) and c-aAb (N = 1478). We performed logistic regression models using the CRP, suPAR or c-aAb as the independent variable and RLS status as the dependent variable, adjusted for appropriate covariates. Our study indicates that a high concentration of CRP is associated with RLS, while an increased probability of experiencing frequent RLS symptoms in those with an elevated plasma suPAR level appears to be mediated through lifestyle factors. We additionally report that a high titer of autoantibodies specific against the cytokine interferon-alpha was associated with RLS. Our results support the existence of links between systemic inflammation and RLS, though further RLS studies on CRP, suPAR and c-aAb in larger cohorts are warranted to confirm our findings and further reveal the hitherto underexplored links between RLS and inflammation.
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Dowsett J, Didriksen M, Larsen MH, Dinh KM, Kaspersen KA, Mikkelsen S, Thørner LW, Sørensen E, Erikstrup C, Pedersen OB, Eugen-Olsen J, Banasik K, Ostrowski SR. Investigating the inflammation marker neutrophil-to-lymphocyte ratio in Danish blood donors with restless legs syndrome. PLoS One 2021; 16:e0259681. [PMID: 34767616 PMCID: PMC8589184 DOI: 10.1371/journal.pone.0259681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 10/24/2021] [Indexed: 11/18/2022] Open
Abstract
Background Restless Legs Syndrome (RLS) is a neurological sensorimotor disorder that occurs in the evening and night, thereby impacting quality of sleep in sufferers. The pathophysiology of RLS is poorly understood but inflammation has been proposed as possibly being involved. The neutrophil-to-lymphocyte ratio (NLR) can be used as an inflammation marker but results from small studies have been inconclusive in determining whether NLR is associated with RLS. We aimed to assess whether an association between NLR and RLS exists in a large cohort of healthy individuals. Methods Neutrophils and lymphocytes were measured in blood samples of 13,055 individuals from the Danish Blood Donor Study, all of whom completed the validated Cambridge-Hopkins RLS-questionnaire for RLS assessment. Results In the sample, 661 individuals were determined as current RLS cases (5.1%). A higher proportion of individuals with RLS were females (62.5% vs 47.5%; P<0.001) and RLS cases were older than controls (P<0.001), but no differences in body mass index (BMI), smoking or alcohol consumption were found between the two groups. An increased NLR was observed in RLS cases compared to controls (median NLR: 1.80 vs 1.72; P = 0.033). In an unadjusted logistic regression model, increased NLR was associated with RLS (OR = 1.10 per NLR unit increase [95%CI:1.01–1.20]; P = 0.032); however, the association was not significant in multivariate models adjusting for sex and age (P = 0.094) or sex, age, alcohol consumption, smoking status and BMI (P = 0.107). Conclusion We found no association between RLS and NLR among Danish blood donors after adjusting for sex, age, alcohol consumption, smoking status and BMI. Further studies are needed to determine whether inflammation is a risk factor for RLS.
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Affiliation(s)
- Joseph Dowsett
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- * E-mail:
| | - Maria Didriksen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Margit Hørup Larsen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Khoa Manh Dinh
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
| | - Kathrine Agergård Kaspersen
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
- Danish Big Data Centre for Environment and Health (BERTHA), Aarhus University, Roskilde, Denmark
| | - Susan Mikkelsen
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
| | - Lise Wegner Thørner
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Erik Sørensen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Christian Erikstrup
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
| | | | - Jesper Eugen-Olsen
- Department of Clinical Research, Copenhagen University Hospital Amager and Hvidovre, Hvidovre, Denmark
| | - Karina Banasik
- Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Sisse Rye Ostrowski
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
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Su YC, Guo YH, Liao CL, Lin YC. Effectiveness and Safety of Botulinum Toxin Type A in Treatment of Restless Legs Syndrome: A Systematic Review and Meta-Analysis. Healthcare (Basel) 2021; 9:healthcare9111538. [PMID: 34828584 PMCID: PMC8623507 DOI: 10.3390/healthcare9111538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/02/2021] [Accepted: 11/04/2021] [Indexed: 11/27/2022] Open
Abstract
Our study aimed to investigate the effectiveness and safety of botulinum toxin type A in patients with restless legs syndrome. We searched electronic databases, including PubMed, Cochrane Library, and Web of Science, up to 12 June 2021, for published articles. We enrolled randomized controlled clinical trials and non-randomized controlled studies involving patients with restless legs syndrome who were treated with botulinum toxin. Quality assessment was performed using the Cochrane risk of bias tool and Joanna Briggs Institute Critical Appraisal Checklist for Quasi-Experimental Studies. As for the results, we included four articles comprising 62 participants, two studies were randomized controlled trials. Improvement in International Restless Legs Syndrome Study Group (IRLSSG) rating scale was observed in three studies. Adverse events were temporary and self-limited. Meta-analyses were performed, including the two randomized controlled trials with 27 participants. Compared with placebo, botulinum toxin injection significantly reduced scores of IRLSSG rating scale (SMD, −0.819, 95% confidence interval [CI], −1.377 to −0.262). A total of 11.8% (95% CI, 0.7–72.4%) of patients reported at least one adverse event. In conclusion, botulinum toxin injection may relieve restless legs syndrome related symptoms. However, decisive conclusions cannot be drawn because of the small number of patients included in our meta-analysis. Large-scale, randomized controlled trials are warranted to discover the optimal dose, safety, and long-term effect of intervention with botulinum toxin type A for patients with restless legs syndrome.
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Affiliation(s)
- Yu-Chi Su
- National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70428, Taiwan;
| | - Yao-Hong Guo
- Department of Physical Medicine and Rehabilitation, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70428, Taiwan;
| | - Chung-Lun Liao
- School of Medicine, College of Medicine, National Cheng Kung University, Tainan 70428, Taiwan;
| | - Yu-Ching Lin
- Department of Physical Medicine and Rehabilitation, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70428, Taiwan;
- Department of Physical Medicine and Rehabilitation, College of Medicine, National Cheng Kung University, Tainan 70428, Taiwan
- Correspondence:
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Dowsett J, Didriksen M, Larsen MH, Burgdorf KS, Thørner LW, Sørensen E, Erikstrup C, Pedersen OB, Ostrowski SR, Ullum H. No association between plasma hepcidin levels and restless legs syndrome - results from the Danish Blood Donor Study. Sleep Med 2021; 88:68-73. [PMID: 34736065 DOI: 10.1016/j.sleep.2021.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 10/06/2021] [Accepted: 10/11/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND Restless Legs Syndrome (RLS) is a neurological sensorimotor disorder that occurs in the evening and night, thereby often impacting quality of sleep in sufferers. The aetiology of RLS is not completely understood although iron dysregulation has been suggested as a likely pathway. The relationship between RLS and the iron regulatory protein hepcidin has not been studied in large cohorts. We aimed to assess whether an association between plasma hepcidin variation and RLS exists in a large cohort of healthy individuals. METHODS Plasma hepcidin levels were measured in 9708 Danish blood donors from the Danish Blood Donor Study all of whom correctly completed the validated Cambridge-Hopkins RLS-questionnaire for RLS assessment. RESULTS A total of 466 blood donors were determined as current RLS cases in the sample (4.8%). RLS cases had a significantly higher proportion of females (56.7% vs 46.7%; P < 0.001) and were older (median age [IQR] 40.6 years vs 38.0 years; P = 0.010) than controls. RLS cases were also more frequent smokers (P = 0.004). No significant differences were found in body mass index (BMI), alcohol consumption, time of donation and donation history between cases and controls. No difference in plasma hepcidin levels was observed between RLS cases and controls (median concentration [IQR]: 10.5 ng/ml [6.3-16.4] in RLS cases vs 10.5 ng/ml [6.0-16.5] in controls). Using a logistic regression model, we found that hepcidin levels were not associated with RLS after adjusting for age, sex, alcohol consumption, smoking status, donation time and donation history (OR = 1.00 [0.99-1.02] per 1 ng/ml increase of hepcidin; P = 0.429). CONCLUSION Our study in Danish blood donors did not find an association between RLS and plasma hepcidin levels. Our findings suggest that plasma hepcidin's role as a potential diagnostic biomarker of RLS is inadequate.
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Affiliation(s)
- Joseph Dowsett
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
| | - Maria Didriksen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Margit Hørup Larsen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | | | - Lise Wegner Thørner
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Erik Sørensen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | | | | | - Sisse Rye Ostrowski
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Henrik Ullum
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
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Abstract
Sleep is entwined across many physiologic processes in the brain and periphery, thereby exerting tremendous influence on our well-being. Yet sleep exists in a social-environmental context. Contextualizing sleep health with respect to its determinants—from individual- to societal-level factors—would enable neuroscientists to more effectively translate sleep health into clinical practice. Key challenges and opportunities pertain to (i) recognizing and exploring sleep’s functional roles, (ii) clarifying causal mechanisms in relation to key outcomes, (iii) developing richer model systems, (iv) linking models to known contextual factors, and (v) leveraging advances in multisensory technology. Meeting these challenges and opportunities would help transcend disciplinary boundaries such that social-environmental considerations related to sleep would become an ever-greater presence in the clinic.
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Affiliation(s)
- Michael A. Grandner
- Department of Psychiatry, University of Arizona College of Medicine – Tucson, 1501 N. Campbell Ave., Suite AHSC 7326, Tucson, AZ 85724, USA
| | - Fabian-Xosé Fernandez
- Department of Psychology, University of Arizona College of Science, 1503 E. University Blvd., Room 507, Tucson, AZ 85721, USA
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Richards K, Britt KC, Cuellar N, Wang Y, Morrison J. Clinical Decision-Making: Restless Legs Syndrome and Dementia in Older Adults. Nurs Clin North Am 2021; 56:265-274. [PMID: 34023120 DOI: 10.1016/j.cnur.2021.02.005] [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: 11/28/2022]
Abstract
Restless legs syndrome (RLS), one of the more prevalent sleep disturbances among older adults, impacts quality of life. Patients with dementia are at high risk for developing RLS and may be unable to describe their symptoms. Often underdiagnosed, RLS can contribute to discomfort, pain, nighttime agitation, disturbed sleep, and falls. Clinical assessment is crucial and should include a thorough evaluation with input from the patient and family, deprescribing medication if possible, and consideration of common sleep-disturbing factors. Evidence-based treatment in this population is limited; overall focus should center on relieving discomfort while identifying and treating bothersome sleep symptoms.
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Affiliation(s)
- Kathy Richards
- The University of Texas at Austin, School of Nursing, 1710 Red River Street, Austin, TX 78712, USA. https://twitter.com/kathyrichards2
| | - Katherine Carroll Britt
- The University of Texas at Austin, School of Nursing, 1712 Red River Street, Austin, TX 78712, USA. https://twitter.com/KatherineCBritt1
| | - Norma Cuellar
- The University of Alabama, University Boulevard, 650 University Boulevard East, Tuscaloosa, AL 35401, USA.
| | - Yanyan Wang
- The University of Texas at Austin, School of Nursing, 1712 Red River Street, Austin, TX 78712, USA. https://twitter.com/yanw06689982
| | - Janet Morrison
- The University of Texas at Austin, School of Nursing, 1712 Red River Street, Austin, TX 78712, USA. https://twitter.com/phdb4ss
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Louis ED, McCreary M. How Common is Essential Tremor? Update on the Worldwide Prevalence of Essential Tremor. Tremor Other Hyperkinet Mov (N Y) 2021; 11:28. [PMID: 34277141 PMCID: PMC8269764 DOI: 10.5334/tohm.632] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 06/29/2021] [Indexed: 12/11/2022] Open
Abstract
Background Essential tremor (ET) is among the most prevalent movement disorders. Comprehensive reviews of disease prevalence were published in 1998 and 2010 but not since then. We reviewed the prevalence of ET in population-based epidemiological studies, derived a precise summary estimate of prevalence from these studies, and examined differences in prevalence across studies. We used two methods: a descriptive-analytical approach and a meta-analysis. Methods A PUBMED search yielded 14 published papers since the 2010 review. Results There were 42 population-based prevalence studies (23 countries and 6 continents). In a meta-analysis, pooled prevalence (all ages) = 1.33%, with statistically significant heterogeneity across studies (I2 = 99.3%, p < 0.0001). In additional descriptive analyses, median crude prevalence (all ages) = 0.4% and mean = 0.67%. Prevalence increased markedly with age, and especially with advanced age. In the meta-analysis, prevalence (age ≥ 65 years) = 5.79%, and in descriptive analyses, median crude prevalence (age ≥ 60-65) = 5.9% and mean = 8.0%. In the oldest age groups, median prevalence = 9.3%, with several studies reporting values >20%. The prevalence increased by 74% for every decade increase in age (p < 0.0001). Gender did not impact the prevalence of ET (p = 0.90). Discussion Precise prevalence estimates are important because they form the numerical basis for public health initiatives and offer clues about underlying biological factors of mechanistic importance. The prevalence of ET among those age ≥ 65 is similar to that reported for Alzheimer's disease in elders, suggesting that ET may be the most common neurodegenerative disease.
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Affiliation(s)
- Elan D. Louis
- Department of Neurology, University of Texas Southwestern, Dallas, TX, USA
| | - Morgan McCreary
- Department of Neurology, University of Texas Southwestern, Dallas, TX, USA
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Umbreit A, Sinha S, Kolla BP, Mansukhani MP. Challenges in the Treatment of Restless Legs Syndrome: A Case Report. J Prim Care Community Health 2021; 12:21501327211019590. [PMID: 34032164 PMCID: PMC8155758 DOI: 10.1177/21501327211019590] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Treatment resistant restless legs syndrome (RLS) in the setting of psychiatric
comorbidities can be difficult to manage. Our patient is a 69-year-old Caucasian gentleman
with bipolar disorder type I, unspecified anxiety disorder, obstructive sleep apnea (OSA),
and treatment-refractory RLS. At initial presentation, the patient’s prescribed medication
regimen included fluoxetine 40 mg daily, gabapentin 800 mg in the morning and 3200 mg at
bedtime, pramipexole 0.375 mg daily, lamotrigine 200 mg daily, trazodone 200 mg at
bedtime, and temazepam 15 to 30 mg as needed for insomnia and RLS. Over the course of
nearly 4 years, treatment interventions for this patient’s RLS included: cognitive
behavioral therapy for insomnia, discontinuation of exacerbating medications, switching
dopamine agonists, use of pregabalin and iron supplement. This report demonstrates a
challenging case of RLS in the setting of psychiatric comorbidities, development of
augmentation, and polypharmacy.
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Affiliation(s)
| | - Shirshendu Sinha
- Southwest Minnesota Region, Mankato, MN, USA.,Mayo Clinic, Rochester, MN, USA
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Erdal Y, Perk S, Alnak A, Liman E, Dereci H, Emre U. Obsessive–compulsive disorder in restless legs syndrome. Sleep Biol Rhythms 2021. [DOI: 10.1007/s41105-021-00329-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abdul Karim M, Al-Baz N, Ouanes S, Alabdulla M, Haddad PM. Suspected Agomelatine-induced restless legs syndrome: a case report. BMC Psychiatry 2021; 21:180. [PMID: 33827492 PMCID: PMC8025526 DOI: 10.1186/s12888-021-03175-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 03/20/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Restless Legs Syndrome (RLS) is a sensorimotor disorder characterized by unpleasant and distressing sensations in the lower limbs that are more pronounced in the evening, commence or worsen at rest, and show partial or complete relief following movement. It can occur as a primary disorder, secondary to medical conditions or treatment with medications including but not limited to antidepressants or antipsychotics. CASE PRESENTATION A 32-year old man with major depressive disorder showed partial response to Escitalopram 10 mg daily. Agomelatine 25 mg at night was added to Escitalopram to treat his residual depressive symptoms, namely insomnia and tiredness. Within two days he developed restlessness and unpleasant sensations in his legs which were worse at night. Symptom severity increased over the following days, prompting an urgent consultation a week later. The patient's presentation met the criteria for RLS. Agomelatine was discontinued leaving the patient on Escitalopram alone. The patient's symptoms improved within 24 h of stopping Agomelatine, with complete resolution four days later. There was no recurrence of RLS during follow-up. The patient scored 6 on Naranjo's adverse drug reaction probability scale, indicating a probable adverse drug reaction caused by Agomelatine. CONCLUSIONS To the best of our knowledge, this is the first case report of suspected Agomelatine-induced RLS. Clinicians need to be aware of RLS to enable prompt diagnosis and management. We suggest adding Agomelatine to the list of agents that can potentially induce RLS.
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Affiliation(s)
- Mustafa Abdul Karim
- Hamad Medical Corporation, Doha, Qatar. .,Weill Cornell Medicine- Qatar, Ar-Rayyan, Qatar.
| | - Nadeen Al-Baz
- grid.413548.f0000 0004 0571 546XHamad Medical Corporation, Doha, Qatar ,Weill Cornell Medicine- Qatar, Ar-Rayyan, Qatar
| | - Sami Ouanes
- grid.413548.f0000 0004 0571 546XHamad Medical Corporation, Doha, Qatar ,grid.412603.20000 0004 0634 1084College of Medicine, Qatar University, Doha, Qatar
| | - Majid Alabdulla
- grid.413548.f0000 0004 0571 546XHamad Medical Corporation, Doha, Qatar ,grid.412603.20000 0004 0634 1084College of Medicine, Qatar University, Doha, Qatar
| | - Peter M. Haddad
- grid.413548.f0000 0004 0571 546XHamad Medical Corporation, Doha, Qatar ,grid.412603.20000 0004 0634 1084College of Medicine, Qatar University, Doha, Qatar
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Tuna Oran N, Yuksel E, Ruzgar S. Prevalence of restless leg syndrome and effects on quality of life during pregnancy. Sleep Breath 2021; 25:2127-2134. [PMID: 33566234 DOI: 10.1007/s11325-021-02311-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 01/30/2021] [Accepted: 02/03/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE Restless leg syndrome (RLS) is a movement disorder which constitutes the most common and major risk group during pregnancy. The purpose of this study was to determine prevalence and severity of RLS during pregnancy and to investigate the effect of RLS on quality of life in pregnant women. METHODS This cross-sectional study was conducted in antenatal clinics of four different public hospitals. Data collected were pregnancy assessment form, RLS diagnostic criteria form, RLS severity scale, and SF-12 quality of life scale. RESULTS Among 718 pregnant women, mean age was 28.3±5.9 years (range 19 to 45). According to the diagnostic criteria of RLS, RLS prevalence was 22% (n=159). Of the 159 women with RLS, 41% had moderate severity and 40% had severe RLS. Prevalence of RLS in pregnant women increased with gestational week, working time during pregnancy, weight before pregnancy, total weight gain during pregnancy, and pre-pregnancy body mass index. Physical health scores, physical functioning scores, pain scores, emotional role difficulty scores, and social function scores were significantly lower in the pregnant women with RLS than without RLS (p <0.05). CONCLUSIONS Approximately one-fifth of the pregnant women had RLS, mostly in the third trimester, and the severity of RLS was predominantly moderate and severe. Pregnant women with RLS had poorer quality of life than pregnant women without RLS.
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Affiliation(s)
- Nazan Tuna Oran
- Department of Midwifery, Faculty of Health Sciences, Ege University, Bornova, 35100, Izmir, Turkey
| | - Esma Yuksel
- Department of Midwifery, Faculty of Health Sciences, Ege University, Bornova, 35100, Izmir, Turkey.
| | - Sebnem Ruzgar
- Department of Midwifery, Faculty of Health Sciences, Ondokuz Mayıs University, Samsun, Turkey
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Gao X, Ba DM, Bagai K, Liu G, Ma C, Walters AS. Treating Restless Legs Syndrome Was Associated With Low Risk of Cardiovascular Disease: A Cohort Study With 3.4 Years of Follow-Up. J Am Heart Assoc 2021; 10:e018674. [PMID: 33550813 PMCID: PMC7955352 DOI: 10.1161/jaha.120.018674] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background Restless legs syndrome (RLS) is associated with higher cardiovascular disease (CVD) risk. However, it remains unknown whether treatment of RLS lowers the cardiovascular risk associated with RLS. Methods and Results All data were collected retrospectively, but subjects were prospectively followed forward in time to determine outcomes of interest. We used the Truven Health MarketScan Commercial Claims and Encounters database from January 1, 2006, through December 31, 2014. Participants were 169 393 individuals, which included 24 199 nonpregnant participants with an RLS diagnosis (16 694 receiving treatments for RLS and 7505 without treatment) during 2006 to 2008 and 145 194 age- and sex-matched participants without RLS. All participants were free of CVD before January 1, 2009 (analysis baseline). Incident CVD cases (myocardial infarction, angina, stroke, atrial fibrillation, and heart failure) were identified. We adjusted for potential confounders, such as presence of chronic conditions and medication use. We identified 16 574 incident CVD cases during 2009 to 2014. Relative to the non-RLS group, the adjusted hazard ratio (HR) for future CVD was 1.26 (95% CI, 1.20-1.32) (P<0.001) for the RLS with treatment group, and 1.53 (95% CI, 1.42-1.65) (P<0.001) for the RLS without treatment group. Significant lower CVD risk was observed for all different RLS treatments, including dopaminergics, anticonvulsants, benzodiazepines, and opiates (adjusted HRs range, 0.71-0.84; P<0.001 for all), except for ergot-dopamine use. Conclusions RLS was associated with higher future CVD risk. However, RLS was associated with statistically significantly less future cardiovascular risk in RLS patients with treatment than in those without treatment.
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Affiliation(s)
- Xiang Gao
- Department of Nutritional SciencesPenn State UniversityUniversity ParkPA
| | - Djibril M. Ba
- Department of Public Health SciencesPenn State College of MedicineHersheyPA
| | - Kanika Bagai
- Department of NeurologyVanderbilt University Medical CenterNashvilleTN
| | - Guodong Liu
- Department of Public Health SciencesPenn State College of MedicineHersheyPA
| | - Chaoran Ma
- Department of Nutritional SciencesPenn State UniversityUniversity ParkPA
| | - Arthur S. Walters
- Department of NeurologyVanderbilt University Medical CenterNashvilleTN
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Didriksen M, Nawaz MS, Dowsett J, Bell S, Erikstrup C, Pedersen OB, Sørensen E, Jennum PJ, Burgdorf KS, Burchell B, Butterworth AS, Soranzo N, Rye DB, Trotti LM, Saini P, Stefansdottir L, Magnusson SH, Thorleifsson G, Sigmundsson T, Sigurdsson AP, Van Den Hurk K, Quee F, Tanck MWT, Ouwehand WH, Roberts DJ, Earley EJ, Busch MP, Mast AE, Page GP, Danesh J, Di Angelantonio E, Stefansson H, Ullum H, Stefansson K. Large genome-wide association study identifies three novel risk variants for restless legs syndrome. Commun Biol 2020; 3:703. [PMID: 33239738 PMCID: PMC7689502 DOI: 10.1038/s42003-020-01430-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 10/21/2020] [Indexed: 02/02/2023] Open
Abstract
Restless legs syndrome (RLS) is a common neurological sensorimotor disorder often described as an unpleasant sensation associated with an urge to move the legs. Here we report findings from a meta-analysis of genome-wide association studies of RLS including 480,982 Caucasians (cases = 10,257) and a follow up sample of 24,977 (cases = 6,651). We confirm 19 of the 20 previously reported RLS sequence variants at 19 loci and report three novel RLS associations; rs112716420-G (OR = 1.25, P = 1.5 × 10-18), rs10068599-T (OR = 1.09, P = 6.9 × 10-10) and rs10769894-A (OR = 0.90, P = 9.4 × 10-14). At four of the 22 RLS loci, cis-eQTL analysis indicates a causal impact on gene expression. Through polygenic risk score for RLS we extended prior epidemiological findings implicating obesity, smoking and high alcohol intake as risk factors for RLS. To improve our understanding, with the purpose of seeking better treatments, more genetics studies yielding deeper insights into the disease biology are needed.
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Affiliation(s)
- Maria Didriksen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
- deCODE Genetics, 101, Reykjavik, Iceland
| | - Muhammad Sulaman Nawaz
- deCODE Genetics, 101, Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101, Reykjavik, Iceland
| | - Joseph Dowsett
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
| | - Steven Bell
- The National Institute for Health Research Blood and Transplant Unit in Donor Health and Genomics, University of Cambridge, Cambridge, CB1 8RN, UK
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
- British Heart Foundation Centre of Research Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Christian Erikstrup
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
| | - Ole B Pedersen
- Department of Clinical Immunology, Nastved Sygehus, Nastved, Denmark
| | - Erik Sørensen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
| | - Poul J Jennum
- Department of Clinical Neurophysiology, Danish Center for Sleep Medicine, Copenhagen University Hospital, Rigshospitalet, Glostrup, Denmark
- Faculty of Health, University of Copenhagen, Copenhagen, Denmark
| | - Kristoffer S Burgdorf
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark
| | - Brendan Burchell
- Faculty of Human, Social and Political Sciences, University of Cambridge, Cambridge, CB1 8RN, UK
| | - Adam S Butterworth
- The National Institute for Health Research Blood and Transplant Unit in Donor Health and Genomics, University of Cambridge, Cambridge, CB1 8RN, UK
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
- British Heart Foundation Centre of Research Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Nicole Soranzo
- The National Institute for Health Research Blood and Transplant Unit in Donor Health and Genomics, University of Cambridge, Cambridge, CB1 8RN, UK
- Department of Haematology, University of Cambridge, Cambridge Biomedical Campus, Cambridge, CB2 0PT, UK
- Department of Human Genetics, The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1HH, UK
| | - David B Rye
- Department of Neurology and Program in Sleep, Emory University, Atlanta, GA, USA
| | - Lynn Marie Trotti
- Department of Neurology and Program in Sleep, Emory University, Atlanta, GA, USA
| | - Prabhjyot Saini
- Department of Neurology and Program in Sleep, Emory University, Atlanta, GA, USA
| | | | | | | | - Thordur Sigmundsson
- Faculty of Medicine, University of Iceland, 101, Reykjavik, Iceland
- Department of Psychiatry, Telemark Hospital Trust, Skien, Norway
| | | | - Katja Van Den Hurk
- Department of Donor Studies, Sanquin Research, 1066 CX, Amsterdam, The Netherlands
| | - Franke Quee
- Department of Donor Studies, Sanquin Research, 1066 CX, Amsterdam, The Netherlands
| | - Michael W T Tanck
- Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Willem H Ouwehand
- The National Institute for Health Research Blood and Transplant Unit in Donor Health and Genomics, University of Cambridge, Cambridge, CB1 8RN, UK
- Department of Haematology, University of Cambridge, Cambridge Biomedical Campus, Cambridge, CB2 0PT, UK
- Department of Human Genetics, The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1HH, UK
| | - David J Roberts
- The National Institute for Health Research Blood and Transplant Unit in Donor Health and Genomics, University of Cambridge, Cambridge, CB1 8RN, UK
- National Health Service (NHS) Blood and Transplant and Radcliffe Department of Medicine, NIHR Oxford Biomedical Research Centre, University of Oxford, John Radcliffe Hospital, Oxford, UK
- BRC Haematology Theme and Department of Haematology, Churchill Hospital, Oxford, UK
| | - Eric J Earley
- RTI International, Research Triangle Park, Durham, NC, USA
| | - Michael P Busch
- Vitalant Research Institute, San Francisco, CA, USA
- Department of Laboratory Medicine, University of San Francisco, San Francisco, CA, USA
| | - Alan E Mast
- Blood Research Institute, Versiti, Milwaukee, WI, USA
| | | | - John Danesh
- The National Institute for Health Research Blood and Transplant Unit in Donor Health and Genomics, University of Cambridge, Cambridge, CB1 8RN, UK
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
- British Heart Foundation Centre of Research Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
- Department of Human Genetics, The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1HH, UK
| | - Emanuele Di Angelantonio
- The National Institute for Health Research Blood and Transplant Unit in Donor Health and Genomics, University of Cambridge, Cambridge, CB1 8RN, UK
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
- British Heart Foundation Centre of Research Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | | | - Henrik Ullum
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, 2100, Copenhagen, Denmark.
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Akhmadulina AO, Levin OS, Poluektov MG. [Restless legs syndrome in Parkinson's disease]. Zh Nevrol Psikhiatr Im S S Korsakova 2020; 120:80-88. [PMID: 33205935 DOI: 10.17116/jnevro202012010280] [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] [Indexed: 11/17/2022]
Abstract
Disturbances in sleep and wakefulness are important symptoms of Parkinson's disease (PD) and are associated with negative effects on patients' quality of life. The analysis of literature on the relationship between RLS and PD revealed three main hypotheses explaining the relatively high incidence of RLS in PD: (1) RLS can be considered as an early (prodromal) manifestation or a predictor of PD that can outpace its main symptoms by several years (by analogy with conduct disorder during sleep with REM); (2) the high incidence of RLS in the advanced stage of PD may be associated with augmentation of previously latent RLS symptoms during prolonged dopaminergic therapy of PD; (3) a significant proportion of RLS cases in PD patients are not «classical» RLS, but represent, for example, manifestations of motor or non-motor fluctuations or a special form of stereotypy in the legs. Further research is needed to determine if any of these statements are true.
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Affiliation(s)
- A O Akhmadulina
- Russian Medical Academy of Continuous Professional Education, Moscow, Russia
| | - O S Levin
- Russian Medical Academy of Continuous Professional Education, Moscow, Russia
| | - M G Poluektov
- Sechenov First Moscow Medical University, Moscow, Russia
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Lin CY, Tsai SJ, Peng CK, Yang AC. Sleep state instabilities in patients with periodic limb movements in sleep - Detection and quantification with heart rate variability. Psychiatry Res 2020; 293:113454. [PMID: 32977051 DOI: 10.1016/j.psychres.2020.113454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 09/05/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Restless legs syndrome (RLS) has been thought to increase the risk of hypertension, cardiovascular events, and all-cause mortality. Periodic limb movements in sleep (PLMS) can be observed in most patients with RLS. Using non-invasive physiologic measurement and analysis, including heart rate variability (HRV) analysis, we aimed to investigate sleep quality and sleep state stability. METHOD A total of 53 healthy controls and 15 patients with RLS and PLMS were recruited. Patients with other sleep-related disorders such as obstructive sleep apnea (OSA) and major depressive disorder (MDD) were excluded. Each subject was evaluated using sleep and mood questionnaires and had to undergo polysomnography (PSG). HRV analysis was applied to assess autonomic function and analyze correlations with the severity of periodic leg movements (PLM). The power of different brainwaves was analyzed using electroencephalogram (EEG). Electromyogram (EMG) was also used to explore the temporal correlation between changes in HRV and leg movement events. RESULTS Compared with healthy controls, PLMS group had not only poorer perceived sleep and mood questionnaires scales but also reductions in parasympathetic-related HRV indices and increases in sympathetic-related HRV parameters. The changes were in proportion to the severity of PLM. Brainwaves and sleep stage which indicate "deep sleep" decreased in the PLMS group. There were no significant temporal correlations between changes in HRV and leg movement events. CONCLUSIONS Our findings suggest that patients with RLS and PLMS have poorer subjective sleep and mood scales. Besides, objective sleep quality including HRV analysis and brainwaves analysis revealed reduced parasympathetic tone, increased sympathetic tone, and sleep disturbance, which reveal the possibility of a higher risk for secondary disease.
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Affiliation(s)
- Chen-Yu Lin
- Taichung Veterans General Hospital, Taichung, Taiwan
| | - Shih-Jen Tsai
- Division of Psychiatry, School of Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Brain Science/Digital Medicine Center, National Yang-Ming University, No 155, Sec. 2, Li-Nung St. Beitou Dist., Taipei, Taiwan
| | - Chung-Kang Peng
- Division of Interdisciplinary Medicine and Biotechnology, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA, United States
| | - Albert C Yang
- Institute of Brain Science/Digital Medicine Center, National Yang-Ming University, No 155, Sec. 2, Li-Nung St. Beitou Dist., Taipei, Taiwan.
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Cubo E, Collazo Riobo C, Gallego-Nieto C, Elizari-Roncal M, Barroso-Pérez T, Calvo S, Echavarria A, Marras C. Survival in Restless Legs Syndrome: An 11-Year Surveillance, Community-Based Population Study. Neuroepidemiology 2020; 54:375-382. [DOI: 10.1159/000508855] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 05/20/2020] [Indexed: 11/19/2022] Open
Abstract
<b><i>Background:</i></b> A growing body of evidence relates restless legs syndrome (RLS) to an increased risk of mortality attributable to both cerebrovascular and cardiovascular events. The aim was to investigate survival in patients with RLS. <b><i>Methods:</i></b> This was an observational, retrospective longitudinal study of a cohort of patients followed up for 11 years. RLS was diagnosed by a physician using the International RLS Study Group criteria. Mortality was analyzed using age-standardized mortality ratios (SMR: observed/expected deaths) and Cox regression analysis. <b><i>Results:</i></b> Vital status was studied in a cohort of 232 patients: 181 women (78%), 96 with RLS (41.4%) with a mean age at baseline of 49.8 ± 15.0 years and a mean RLS duration of 14.1 ± 1.9 years, and 136 non-RLS (58.6%) with a mean age of 51.3 ± 14.9 years. This RLS cohort was followed up for a period of 10.4 ± 2.0 years. As of September 2019, 17 (7.3%) patients died (6 with RLS, 6.3%), and the most frequent cause was oncological (66.7%). A total of 944 person-years of observations were available for survival analysis. RLS was not associated with increased mortality in adjusted Cox regression analysis (HR = 1.12, 95% CI: 0.40–3.15), and survival was similar to that expected for the general population (SMR = 0.61, 95% CI: 0.27–1.36). <b><i>Conclusions:</i></b> RLS seems not to be associated with increased mortality compared to the general population. Still, studies with prospective data collection with large samples are needed to study the long-term mortality risk factors in RLS cohorts.
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Yolgösteren A, Leba LK, Demir AB. Investigation of chronic venous insufficiency in patients with sleep disorders due to restless legs syndrome. Phlebology 2020; 35:771-776. [PMID: 32664803 DOI: 10.1177/0268355520940921] [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] [Indexed: 11/15/2022]
Abstract
BACKGROUND We aimed to investigate of chronic venous insufficiency on patients with sleep disorder due to restless legs syndrome. METHOD Five hundred forty-one cases on whom polysomnography was performed due to sleep disorder were evaluated retrospectively. Forty patients with restless legs syndrome were determined. They were examined by history, physical examination, and duplex ultrasonography in terms of chronic venous insufficiency. The sleep stage rates of both groups were compared (that the rate of total sleep time in polysomnography to sleep stages is expressed as minute and percentage has been defined as sleep stage rate). RESULT Chronic venous insufficiency was identified in 20 out of 40 patients (group 1; female, 90%). In group 2, there were patients with only restless legs syndrome but with no chronic venous insufficiency (female, 80%). The mean ages of both groups were 56.4 ± 11.8 and 54.3 ± 14.7 years. Stage 1 sleep rate in group 1 was 5% ± 2.7 and in group 2 was 8% ± 3.8 (p = 0.006). Periodic limb movement index (polysomnography finding evaluating involuntary leg movements during sleep) was 11.4 ± 17.5 in group 1, and it was 29.4 ± 37.9 in group 2 (p = 0.006). CONCLUSION We recommend that chronic venous insufficiency should be investigated in patients with primary restless legs syndrome diagnosis.
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Affiliation(s)
- Atıf Yolgösteren
- Faculty of Medicine, Department of Cardiovascular Surgery, Bursa Uludağ University, Bursa, Turkey
| | - Leyla Köse Leba
- Faculty of Medicine, Department of Neurology, Necmettin Erbakan University, Konya, Turkey
| | - Aylin Bican Demir
- Faculty of Medicine, Department of Neurology, Bursa Uludağ University, Bursa, Turkey
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Steensland I, Koskinen LD, Lindvall P. Treatment of restless legs syndrome with a pump; efficacy and complications. Acta Neurol Scand 2020; 141:368-373. [PMID: 31883387 DOI: 10.1111/ane.13213] [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: 10/13/2019] [Revised: 12/15/2019] [Accepted: 12/26/2019] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Restless legs syndrome (RLS) has a prevalence of 2.5%-15% in the general population. For those who suffer from a medically refractory RLS, intrathecal morphine treatment has been shown to be effective. The aim of this retrospective study was to investigate efficacy, complications and side effects in patients treated over several years with an implantable pump. A comparison was done to a group of patients treated with a similar pump system due to spasticity. MATERIALS AND METHODS The charts of ten patients with severe or very severe RLS have been reviewed. These patients have received an intrathecal drug delivery system during 2000-2016. To compare the rate of complications, a control group of 20 patients treated with intrathecal baclofen due to spasticity was included in the study. Their time of treatment corresponded to the RLS patients. RESULTS The severity of symptoms related to RLS decreased significantly after treatment. Doses required ranged from 68 to 140 µg/d. Two cases of side effects were detected; one case with nausea and dizziness and one case with headache and fatigue. The rate of mechanical, infectious and other complications was similar between the two groups. CONCLUSIONS In light of the decrease in symptom severity and the low rate of side effects, intrathecal morphine can be considered an adequate treatment for those suffering from medically refractory RLS. The occurrence of complications did not differ between subjects with RLS and spasticity.
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Affiliation(s)
- Ingrid Steensland
- Department of Clinical Science, Neurosciences Umeå University Umeå Sweden
| | | | - Peter Lindvall
- Department of Clinical Science, Neurosciences Umeå University Umeå Sweden
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Makhoul J, Ghaoui N, Sleilaty G, Koussa S, Abbas S, Azar C, El Helou J. Restless legs syndrome among multiple sclerosis patients in Lebanon. Mult Scler Relat Disord 2020; 41:101997. [PMID: 32113183 DOI: 10.1016/j.msard.2020.101997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 01/07/2020] [Accepted: 02/07/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Multiple sclerosis (MS) is often associated with fatigue, with an increased prevalence of sleep disorders compared to the general population, notably restless legs syndrome (RLS). The aim of this study was to evaluate the prevalence and severity of RLS as well the co-occurrence of spinal demyelination lesions in patients with MS in Lebanon. METHODS In this cross-sectional study, we consulted the MS database of the Lebanese association against Multiple Sclerosis and sent out questionnaires to 300 MS patients to screen then confirm the presence of RLS. The final sample included 28 MS participants with confirmed RLS. We conducted further questionnaires to collect demographic data, screen for comorbidities, gather spinal MRI results, and evaluate the severity of both diseases (using the EDSS and the JHRLSS). RESULTS Prevalence of RLS was 15% among MS patients in our study. 46.4% of RLS-affected MS patients had spinal cord demyelination lesions on their MRIs. Participants with MRI lesions had a lower severity score on the JHRLSS (p = 0.088). No association was found between the EDSS results and JHRLSS, demographic data, or comorbidities. CONCLUSION Restless legs syndrome is commonly found among patients with multiple sclerosis in Lebanon, is underdiagnosed, and ought to be systematically evaluated for in order to improve the patients' quality of life.
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Affiliation(s)
- J Makhoul
- Department of Neurology, Hôtel-Dieu de France University Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon.
| | - N Ghaoui
- Department of Neurology, Hôtel-Dieu de France University Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - G Sleilaty
- Department of Biostatistics and Epidemiology, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - S Koussa
- Department of Neurology, Hôtel-Dieu de France University Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - S Abbas
- Department of Neurology, Hôtel-Dieu de France University Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - C Azar
- Department of Neurology, Hôtel-Dieu de France University Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - J El Helou
- Department of Neurology, Hôtel-Dieu de France University Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
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Liguori C, Holzknecht E, Placidi F, Izzi F, Mercuri NB, Högl B, Stefani A. Seasonality of restless legs syndrome: symptom variability in winter and summer times. Sleep Med 2020; 66:10-14. [DOI: 10.1016/j.sleep.2019.07.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/14/2019] [Accepted: 07/29/2019] [Indexed: 01/02/2023]
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Fernandez-Jimenez MC, Moreno G, Wright I, Shih PC, Vaquero MP, Remacha AF. Iron Deficiency in Menstruating Adult Women: Much More than Anemia. WOMEN'S HEALTH REPORTS (NEW ROCHELLE, N.Y.) 2020; 1:26-35. [PMID: 33786470 PMCID: PMC7784796 DOI: 10.1089/whr.2019.0011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Background: Iron deficiency anemia (IDA) is highly prevalent in women of child-bearing age. However, their nonhematological symptoms have been overlooked. This study aims to analyze the nonhematological features and symptoms of IDA in a group of women of reproductive age and the changes occurred during iron therapy. Materials and Methods: IDA women underwent dietary, physical activity, menstrual blood loss, and cognitive function assessment at baseline. Hematological and biochemical parameters were analyzed. Executive attention was tested by the flanker task and working memory by the 2-back task. Oral iron therapy (ferrous sulfate) was given to 35 women for 8 weeks and the changes in iron status, biochemical markers, cognitive function, and nonhematological symptoms were evaluated. Results: Patients presented nonhematological symptoms: pica, 32.4%; cheilitis, 20.6%; restless legs syndrome (RLS), 20.6%; diffuse hair loss, 55.9%; and ungual alterations, 38.2%. Two or more symptoms were present in 58.8% of women. Serum iron and working memory were correlated at baseline. Multivariate analyses show associations (odds ratio [OR], 95% confidence interval [CI]) between pica and reaction time in the working memory test (OR 2.14, 95% CI 1.19-3.87, p = 0.012); RLS with total serum protein (OR 0.08, 95% CI 0.06-0.92, p = 0.043); and cheilitis with mean corpuscular hemoglobin (OR 0.388, 95% CI 0.189-0.799, p = 0.01). Pica, cheilitis, and RLS completely resolved with iron therapy, and ungual alterations and hair loss improved in 92.3% and 84.2% of women, respectively. Better performance in executive attention and working memory was observed after iron therapy. Conclusions: More attention should be given to the nonhematological manifestations of IDA to improve the quality of life of menstruating women.
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Affiliation(s)
| | - Gemma Moreno
- Hematology Department, Hospital Ramón y Cajal, Madrid, Spain
| | - Ione Wright
- Department of Metabolism and Nutrition, Institute of Food Science, Technology and Nutrition (ICTAN), Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Pei-Chun Shih
- Faculty of Psychology, Universidad Autónoma de Madrid, Madrid, Spain
| | - M. Pilar Vaquero
- Department of Metabolism and Nutrition, Institute of Food Science, Technology and Nutrition (ICTAN), Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Angel F. Remacha
- Hematology Laboratory Department, Hospital Sant Pau, Barcelona, Spain
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Youssef MK. Efficacy of neuromuscular electric stimulation versus aerobic exercise on uraemic restless legs syndrome. INTERNATIONAL JOURNAL OF THERAPY AND REHABILITATION 2019. [DOI: 10.12968/ijtr.2017.0132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BackgroundThe prevalence of restless legs syndrome in haemodialysis patients is approximately ~30%, and it is significantly higher than in the general population. Restless legs syndrome is a sensory-motor disorder with negative effects on sleep and daytime activities that affect personal, family and occupational life. The overall impact of restless legs syndrome on quality of life is comparable to that of chronic and frustrating conditions such as depression and diabetes. The present study was conducted to compare the effect of neuromuscular electric stimulation with aerobic exercise on cases of uraemic restless legs syndrome.MethodsA total of 60 chronic renal failure patients with uraemic restless legs syndrome aged 20 to 65 years participated in this study. Participants were allocated to receive neuromuscular electric stimulation or aerobic exercises. All participants were evaluated before the first session of treatment and after 3 months, at the end of the treatment. Normal and fast walk gait speed tests and the Five Times Sit-to-Stand Test and 60 second Sit-to-Stand Test were used to assess participants' physical status. The Restless Legs Syndrome Rating Scale was used to determine the level of restless legs syndrome severity.ResultsNeuromuscular electric stimulation resulted in significant improvements in all measures of physical performance and in Restless Legs Syndrome Rating Scale score when compared to baseline. Aerobic exercise produced significant improvements in all tests. At the end of the study, aerobic exercise had greater responses than neuromuscular electric stimulation in all parameters measured except the Five Times Sit-to-Stand Test.ConclusionsNeuromuscular electrical stimulation may be used as an alternative to aerobic exercise to improve physical performance in cases of less severe restless legs syndrome in those unable or unwilling to participate in physical training.
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Affiliation(s)
- Manal K Youssef
- Assistant Professor, Physical Therapy, Department of Internal Medicine, Cairo University Hospitals, Giza, Egypt
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Assessment of serum uric acid levels in patients with restless legs syndrome. Acta Neurol Belg 2019; 119:461-466. [PMID: 31228019 DOI: 10.1007/s13760-019-01177-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 06/17/2019] [Indexed: 12/11/2022]
Abstract
In our study, the aim was to collect data in relation to our hypothesis that oxidative stress is effective in the etiopathogenesis of restless legs syndrome (RLS) by assessing the serum uric acid levels, an important biomarker of oxidative stress, among RLS patients. The study included a total of 281 patients with restless legs syndrome diagnosis according to the "2012 Revised International Restless Legs Syndrome Study Group Diagnostic Criteria". Disease severity was assessed according to the "International Restless Legs Syndrome Study Group Severity Scale". The control group comprised 237 healthy individuals with the same age and gender features as the control group. The result showed no statistically significant difference in the mean age and gender between RLS and control group (p = 0.923; p = 0.433). The hemoglobin, ferritin, and uric acid levels of patients with RLS were found to be low (p < 0.001). Total iron-binding capacity level was higher in patients (p < 0.01; p < 0.05). In RLS patients, the serum uric acid level was not affected by disease severity (p > 0.05). Variables affecting uric acid level in RLS patients were determined to be age, disease duration, and hemoglobin level. The hypothesis that uric acid level, accepted as a biomarker of oxidative stress, is important in the pathogenesis of restless legs syndrome is supported by our study.
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Byrne DA, Sobey CM, Trahan J, Bagai K, Walters A. Spinal Cord Stimulation in Patients With Chronic Pain and Restless Legs Syndrome: A Case Report. A A Pract 2019; 13:110-113. [PMID: 30933049 DOI: 10.1213/xaa.0000000000001007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Restless legs syndrome can be a debilitating condition that affects a patient's ability to function and their quality of life. Neuromodulation may represent a potential option for nonpharmacological management of restless legs syndrome. We present 3 patients who have a chronic pain diagnosis and medically refractory restless legs syndrome that warranted neuromodulation. After neuromodulation, all 3 patients had improvement in their restless legs syndrome symptoms and were taking less pain medication, and 2 out of 3 had significantly improved functionality at short-term follow-up. This case series suggests that spinal cord stimulation may be a viable nonpharmacological treatment option for medically refractory restless legs syndrome.
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Affiliation(s)
| | | | | | - Kanika Bagai
- Department of Neurology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Arthur Walters
- Department of Neurology, Vanderbilt University Medical Center, Nashville, Tennessee
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Cubo E, Gallego-Nieto C, Elizari-Roncal M, Barroso-Pérez T, Collazo C, Calvo S, Delgado-López PD. Is Restless Legs Syndrome Associated with an Increased Risk of Mortality? A Meta-Analysis of Cohort Studies. Tremor Other Hyperkinet Mov (N Y) 2019; 9:650. [PMID: 31413895 PMCID: PMC6691746 DOI: 10.7916/tohm.v0.650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/06/2019] [Indexed: 12/01/2022] Open
Abstract
Background Restless legs syndrome (RLS) is a common sleep disorder,. although controversial, growing evidence relates the presence of RLS to an increased risk of mortality, mainly due to cardiovascular events. The aim of this article was to review the role of RLS as a risk factor of mortality according to independent cohort studies. Methods We performed a literature review via PubMed database for articles relating RLS and mortality. We used the random-effects model to calculate the pooled effect estimates on mortality. Heterogeneity between studies was assessed using quantitative and qualitative analysis. Results Out of 100 articles identified, 13 were finally included. Although studies were heterogeneous (p = 0.001), no significant publication bias was found. When all cohort studies were considered, the random-effects model yielded a significantly increased risk of mortality in RLS versus non-RLS patients (13 studies, hazard ratio [HR] = 1.52, 95% confidence interval [CI] 1.28-1.80). However, this association was not statistically significant when only cohort studies using the international RLS diagnostic criteria were considered (5 studies, HR = 1.63, 95% CI 0.94-2.81). Discussion The results of this meta-analysis suggest that RLS seems to be a risk factor of mortality, although this association is conditioned by the diagnostic criteria used in the studies. Future long-term follow-up standardized mortality studies are needed to address this important question that carries potential impact on population global health.
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Affiliation(s)
- Esther Cubo
- Neurology Department, Hospital Universitario Burgos, ES
- Health Science Department, University of Burgos, ES
| | | | | | | | | | - Sara Calvo
- Research Unit, Hospital Universitario Burgos, ES
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Doan TT, Koo BB, Ogilvie RP, Redline S, Lutsey PL. Restless legs syndrome and periodic limb movements during sleep in the Multi-Ethnic Study of Atherosclerosis. Sleep 2019; 41:5026504. [PMID: 29860522 DOI: 10.1093/sleep/zsy106] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Indexed: 01/24/2023] Open
Abstract
Study Objectives To investigate the prevalence of concurrent periodic limb movements during sleep (PLMS) and restless leg syndrome (RLS), as well as the prevalence of PLMS and RLS separately. Additionally, we document these prevalences by age, race/ethnicity, sex, and obesity status. Methods Cross-sectional data from 2041 Multi-Ethnic Study of Atherosclerosis (MESA) Sleep ancillary study participants were used. PLMS (>15 periodic limb movements per hour of sleep) was measured by polysomnography. RLS symptoms were assessed using the 2009 International Restless Legs Syndrome Study Group clinical criteria. Results The prevalence of RLS with PLMS was 6.7%, RLS alone 16.1%, and PLMS alone 21.2%. RLS with PLMS was prevalent in 7.0% of whites, 4.9% of blacks, 10.1% of Hispanics, and 3.3% of Chinese-Americans. In adjusted models, odds of RLS with PLMS was higher for those older than 67 years versus those younger (odds ratio [OR] [95% confidence interval [CI]] = 1.62 [1.09-2.40]). Relative to white participants, the prevalence of RLS with PLMS tended to be lower among blacks (0.56 [0.32-0.96]). The prevalence of concurrent RLS and PLMS did not statistically differ by sex or obesity status. RLS alone was more common in women. Conclusions Approximately 7% of our sample had RLS with PLMS ("electro-clinical RLS"). This condition was more common among older individuals, did not vary by sex, and was less common among blacks. The findings provide some of the first information about the prevalence of concurrent RLS and PLMS in a community-based sample and show distinct sex and race associations for RLS versus electro-clinical RLS.
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Affiliation(s)
- Thu T Doan
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN
| | - Brian B Koo
- Department of Neurology, Yale University School of Medicine, New Haven, CT.,Department of Neurology, Connecticut Veterans Affairs Health System, West Haven, CT
| | - Rachel P Ogilvie
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - Susan Redline
- Division of Sleep Medicine, Harvard Medical School, Brigham and Women's Hospital and Beth Israel Deaconess Medical Center, Boston, MA
| | - Pamela L Lutsey
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN
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ZHANG L, SUN Y, WANG T, PAN Y, YAO Y, PAN L, XU Q, ZHANG W, XU J, HU X. [Restless legs syndrome in ischemic stroke patients: clinical features and significance]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2019; 48:275-281. [PMID: 31496159 PMCID: PMC8800815 DOI: 10.3785/j.issn.1008-9292.2019.06.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 04/21/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To investigate the clinical features and implication of restless legs syndrome (RLS) in ischemic stroke patients. METHODS A total of 199 ischemic stroke patients were enrolled and assessed by polysomnography (PSG). RLS was identified according to criteria of International Restless Legs Syndrome Study Group. Epworth Sleepiness Scale (ESS), Mini-mental State Examination (MMSE) and Patient Health Questionnaire (PHQ-9) were used to evaluate the sleep quality, cognitive function and post-stroke depression, respectively. The National Institute of Health Stroke Scale (NIHSS) was used to evaluate the neurological function 3 months after stroke onset. Gender-and age-matched non-ischemic stroke patients with RLS (primary PLS) were selected as controls. RESULTS Twenty-two cases of RLS were identified among 199 ischemic stroke patients (11.1%). Generalized linear model and logistic regression showed that low serum ferritin level (β=-133.3 mg/L, 95%CI:-200.4--0.1, P<0.01), subcortical infarction (OR=4.05, 95%CI:1.15-14.18, P<0.05) and female (OR=2.54, 95%CI:1.04-6.23, P<0.05) were identified as the risk factors of RLS in ischemic stroke patients. Compared with ischemic stroke patients without RLS, ESS increased by 4.37 (95%CI:2.33-6.41, P<0.01), PHQ-9 increased by 2.17 (95%CI:0.39--3.94, P<0.05), and reduced NIHSS from the baseline deceased by 0.97 (95%CI:-1.79--0.15, P<0.05) in ischemic stroke patients with RLS. In addition, the incidence of moderate-severe depression increased (OR=4.27, 95%CI:1.40-13.10, P<0.05) in ischemic stroke patients with RLS. The index of periodic leg movements of sleep (PLMS) with arousal in ischemic stroke patients with RLS was significantly higher than that in patients with primary RLS (β=12.85, 95%CI:2.04-23.67, P<0.05). CONCLUSIONS RLS is common in ischemic stroke patients and has adverse influences on patients.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Xingyue HU
- 胡兴越(1962-), 男, 博士, 主任医师, 博士生导师, 主要从事神经内科疾病研究; E-mail:
,
https://orcid.org/0000-0003-3458-2590
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Olgun Yazar H, Yazar T, Özdemir S, Kasko Arici Y. Serum C-reactive protein/albumin ratio and restless legs syndrome. Sleep Med 2019; 58:61-65. [PMID: 31129525 DOI: 10.1016/j.sleep.2019.02.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/03/2019] [Accepted: 02/11/2019] [Indexed: 01/11/2023]
Abstract
OBJECTIVES Our study aimed to assess the variation in serum C-reactive protein/albumin ratio (CAR), a biomarker of peripheral inflammation and oxidative stress, in patients with restless legs syndrome (RLS). METHODS The study included a total of 380 individuals including 197 with RLS diagnosis. RLS diagnosis was determined according to the "International Restless Legs Syndrome Study Group" questionnaire. Disease severity was assessed according to the "International Restless Legs Syndrome Study Group Severity Scale''. RESULTS The mean age of patients with restless legs syndrome was 52.5 ± 12.7 years, while the mean age in the control group was 50.8 ± 11.2, with no statistically significant difference found (p = 0.156). The hemoglobin, iron and ferritin levels in the patient group were lower than in the control group (p < 0.001; p < 0.01; p < 0.001), with total iron binding capacity levels higher than the control group (p < 0.001). The mean ferritin in the RLS group (49.8 ± 51.2) was lower than the control group (76.9 ± 44.7). In patients, the c-reactive protein, albumin and c-reactive protein/albumin ratio were found to be 0.21 ± 0.18, 4.43 ± 0.31 and 0.07 ± 0.05, respectively. When compared with the control group, the patient group had high c-reactive protein (CRP), CAR and low albumin levels (p < 0.001). Among patients with "very severe" disease severity, ferritin levels were found to be lower than those with "moderate" disease severity. Additionally, patients with "very severe" disease had albumin levels which were significantly low compared to those with "mild" disease severity (p < 0.05). CONCLUSION Our study supports the hypothesis that serum albumin level, ferritin, CRP, and CAR may be associated with restless legs syndrome.
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Affiliation(s)
- Hülya Olgun Yazar
- Ordu University Training and Research Hospital, Neurology, Ordu, Turkey.
| | - Tamer Yazar
- Ordu State Hospital, Neurology, Ordu, Turkey
| | - Sonay Özdemir
- İstanbul Gaziosmanpaşa Taksim Training and Research Hospital, Family Medicine, İstanbul, Turkey
| | - Yeliz Kasko Arici
- Ordu University, Faculty of Medicine, Department of Biostatistics and Medical Informatics, Ordu, Turkey
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