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Zakharova MN, Bakulin IS, Abramova AA. Toxic Damage to Motor Neurons. NEUROCHEM J+ 2021. [DOI: 10.1134/s1819712421040164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract—Amyotrophic lateral sclerosis (ALS) is a multifactor disease in the development of which both genetic and environmental factors play a role. Specifically, the effects of organic and inorganic toxic substances can result in an increased risk of ALS development and the acceleration of disease progression. It was described that some toxins can induce potentially curable ALS-like syndromes. In this case, the specific treatment for the prevention of the effects of the toxic factor may result in positive clinical dynamics. In this article, we review the main types of toxins that can damage motor neurons in the brain and spinal cord leading to the development of the clinical manifestation of ALS, briefly present historical data on studies on the role of toxic substances, and describe the main mechanisms of the pathogenesis of motor neuron disease associated with their action.
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Mentis AFA, Dardiotis E, Efthymiou V, Chrousos GP. Non-genetic risk and protective factors and biomarkers for neurological disorders: a meta-umbrella systematic review of umbrella reviews. BMC Med 2021; 19:6. [PMID: 33435977 PMCID: PMC7805241 DOI: 10.1186/s12916-020-01873-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 11/26/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The etiologies of chronic neurological diseases, which heavily contribute to global disease burden, remain far from elucidated. Despite available umbrella reviews on single contributing factors or diseases, no study has systematically captured non-purely genetic risk and/or protective factors for chronic neurological diseases. METHODS We performed a systematic analysis of umbrella reviews (meta-umbrella) published until September 20th, 2018, using broad search terms in MEDLINE, SCOPUS, Web of Science, Cochrane Database of Systematic Reviews, Cumulative Index to Nursing and Allied Health Literature, ProQuest Dissertations & Theses, JBI Database of Systematic Reviews and Implementation Reports, DARE, and PROSPERO. The PRISMA guidelines were followed for this study. Reference lists of the identified umbrella reviews were also screened, and the methodological details were assessed using the AMSTAR tool. For each non-purely genetic factor association, random effects summary effect size, 95% confidence and prediction intervals, and significance and heterogeneity levels facilitated the assessment of the credibility of the epidemiological evidence identified. RESULTS We identified 2797 potentially relevant reviews, and 14 umbrella reviews (203 unique meta-analyses) were eligible. The median number of primary studies per meta-analysis was 7 (interquartile range (IQR) 7) and that of participants was 8873 (IQR 36,394). The search yielded 115 distinctly named non-genetic risk and protective factors with a significant association, with various strengths of evidence. Mediterranean diet was associated with lower risk of dementia, Alzheimer disease (AD), cognitive impairment, stroke, and neurodegenerative diseases in general. In Parkinson disease (PD) and AD/dementia, coffee consumption, and physical activity were protective factors. Low serum uric acid levels were associated with increased risk of PD. Smoking was associated with elevated risk of multiple sclerosis and dementia but lower risk of PD, while hypertension was associated with lower risk of PD but higher risk of dementia. Chronic occupational exposure to lead was associated with higher risk of amyotrophic lateral sclerosis. Late-life depression was associated with higher risk of AD and any form of dementia. CONCLUSIONS We identified several non-genetic risk and protective factors for various neurological diseases relevant to preventive clinical neurology, health policy, and lifestyle counseling. Our findings could offer new perspectives in secondary research (meta-research).
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Affiliation(s)
- Alexios-Fotios A Mentis
- Public Health Laboratories, Hellenic Pasteur Institute, Athens, Greece; and, Department of Neurology, University Hospital of Larissa, University of Thessaly, Larissa, Greece.
| | - Efthimios Dardiotis
- Department of Neurology, University Hospital of Larissa, University of Thessaly, Larissa, Greece
| | - Vasiliki Efthymiou
- University Research Institute of Maternal and Child Health and Precision Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - George P Chrousos
- University Research Institute of Maternal and Child Health and Precision Medicine, and UNESCO Chair on Adolescent Health Care, National and Kapodistrian University of Athens, Athens, Greece
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Kadry Taher M, Farhat N, Karyakina NA, Shilnikova N, Ramoju S, Gravel CA, Krishnan K, Mattison D, Wen SW, Krewski D. Critical review of the association between perineal use of talc powder and risk of ovarian cancer. Reprod Toxicol 2019; 90:88-101. [PMID: 31472245 DOI: 10.1016/j.reprotox.2019.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 08/21/2019] [Accepted: 08/23/2019] [Indexed: 12/24/2022]
Abstract
Over the past four decades, there has been increasing concern that perineal use of talc powder, a commonly used personal care product, might be associated with an increased risk of ovarian cancer. OBJECTIVES To critically review all available human epidemiological data on the relationship between perineal use of talc powder and ovarian cancer, with consideration of other relevant experimental evidence. METHODOLOGY We identified 30 human studies for qualitative assessment of evidence, including 27 that were retained for further quantitative analysis. RESULTS A positive association between perineal use of talc powder and ovarian cancer was found [OR: 1.28 (95% CI: 1.20-1.37)]. A significant risk was noted in Hispanics and Whites, in women applying talc to underwear, in pre-menopausal women and in post-menopausal women receiving hormonal therapy. A negative association was noted with tubal ligation. CONCLUSION Perineal use of talc powder is a possible cause of human ovarian cancer.
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Affiliation(s)
- Mohamed Kadry Taher
- Risk Sciences International, 251 Laurier Ave W, Suite 700, Ottawa, ON, K1P 5J6, Canada; McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada; School of Epidemiology and Public Health, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada.
| | - Nawal Farhat
- Risk Sciences International, 251 Laurier Ave W, Suite 700, Ottawa, ON, K1P 5J6, Canada; McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada; School of Epidemiology and Public Health, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada
| | - Nataliya A Karyakina
- Risk Sciences International, 251 Laurier Ave W, Suite 700, Ottawa, ON, K1P 5J6, Canada; McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada
| | - Nataliya Shilnikova
- Risk Sciences International, 251 Laurier Ave W, Suite 700, Ottawa, ON, K1P 5J6, Canada; McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada
| | - Siva Ramoju
- Risk Sciences International, 251 Laurier Ave W, Suite 700, Ottawa, ON, K1P 5J6, Canada
| | - Christopher A Gravel
- McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada; School of Epidemiology and Public Health, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada; Department of Epidemiology, Biostatistics and Occupational Health, McGill University, 1020 Pine Avenue West, Montreal, QC, H3A 1A2, Canada
| | - Kannan Krishnan
- Risk Sciences International, 251 Laurier Ave W, Suite 700, Ottawa, ON, K1P 5J6, Canada
| | - Donald Mattison
- Risk Sciences International, 251 Laurier Ave W, Suite 700, Ottawa, ON, K1P 5J6, Canada; McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada; School of Epidemiology and Public Health, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada
| | - Shi-Wu Wen
- School of Epidemiology and Public Health, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada; OMNI Research Group, Department of Obstetrics and Gynaecology, University of Ottawa Faculty of Medicine, Ottawa, ON, Canada; Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada; G. Nanhai Hospital, Southern Medical University, Guangzhou, China
| | - Daniel Krewski
- Risk Sciences International, 251 Laurier Ave W, Suite 700, Ottawa, ON, K1P 5J6, Canada; McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada; School of Epidemiology and Public Health, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada
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Gómez-García F, Ruano J, Gay-Mimbrera J, Aguilar-Luque M, Sanz-Cabanillas JL, Alcalde-Mellado P, Maestre-López B, Carmona-Fernández PJ, González-Padilla M, García-Nieto AV, Isla-Tejera B. Most systematic reviews of high methodological quality on psoriasis interventions are classified as high risk of bias using ROBIS tool. J Clin Epidemiol 2017; 92:79-88. [PMID: 28893571 DOI: 10.1016/j.jclinepi.2017.08.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/14/2017] [Accepted: 08/22/2017] [Indexed: 12/26/2022]
Abstract
OBJECTIVES No gold standard exists to assess methodological quality of systematic reviews (SRs). Although Assessing the Methodological Quality of Systematic Reviews (AMSTAR) is widely accepted for analyzing quality, the ROBIS instrument has recently been developed. This study aimed to compare the capacity of both instruments to capture the quality of SRs concerning psoriasis interventions. STUDY DESIGN AND SETTING Systematic literature searches were undertaken on relevant databases. For each review, methodological quality and bias risk were evaluated using the AMSTAR and ROBIS tools. Descriptive and principal component analyses were conducted to describe similarities and discrepancies between both assessment tools. RESULTS We classified 139 intervention SRs as displaying high/moderate/low methodological quality and as high/low risk of bias. A high risk of bias was detected for most SRs classified as displaying high or moderate methodological quality by AMSTAR. When comparing ROBIS result profiles, responses to domain 4 signaling questions showed the greatest differences between bias risk assessments, whereas domain 2 items showed the least. CONCLUSION When considering SRs published about psoriasis, methodological quality remains suboptimal, and the risk of bias is elevated, even for SRs exhibiting high methodological quality. Furthermore, the AMSTAR and ROBIS tools may be considered as complementary when conducting quality assessment of SRs.
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Affiliation(s)
- Francisco Gómez-García
- Department of Dermatology, Reina Sofía University Hospital, 14004 Córdoba, Spain; IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain
| | - Juan Ruano
- Department of Dermatology, Reina Sofía University Hospital, 14004 Córdoba, Spain; IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain.
| | - Jesus Gay-Mimbrera
- IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain
| | | | - Juan Luis Sanz-Cabanillas
- Department of Dermatology, Reina Sofía University Hospital, 14004 Córdoba, Spain; IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain
| | - Patricia Alcalde-Mellado
- IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain; School of Medicine, University of Cordoba, 14004 Córdoba, Spain
| | - Beatriz Maestre-López
- IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain; School of Medicine, University of Cordoba, 14004 Córdoba, Spain
| | | | - Marcelino González-Padilla
- Department of Dermatology, Reina Sofía University Hospital, 14004 Córdoba, Spain; IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain
| | - Antonio Vélez García-Nieto
- Department of Dermatology, Reina Sofía University Hospital, 14004 Córdoba, Spain; IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain
| | - Beatriz Isla-Tejera
- IMIBIC, Reina Sofía University Hospital, University of Cordoba, 14004 Córdoba, Spain; Department of Pharmacy, Reina Sofía University Hospital, 14004 Córdoba, Spain
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Barakat-Haddad C, Shin S, Candundo H, Lieshout PV, Martino R. A systematic review of risk factors associated with muscular dystrophies. Neurotoxicology 2017; 61:55-62. [DOI: 10.1016/j.neuro.2016.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 03/10/2016] [Indexed: 12/14/2022]
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Walsh S, Donnan J, Morrissey A, Sikora L, Bowen S, Collins K, MacDonald D. A systematic review of the risks factors associated with the onset and natural progression of hydrocephalus. Neurotoxicology 2017; 61:33-45. [DOI: 10.1016/j.neuro.2016.03.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 03/14/2016] [Indexed: 01/08/2023]
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Donnan J, Walsh S, Sikora L, Morrissey A, Collins K, MacDonald D. A systematic review of the risks factors associated with the onset and natural progression of spina bifida. Neurotoxicology 2017; 61:20-31. [DOI: 10.1016/j.neuro.2016.03.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 03/09/2016] [Indexed: 12/14/2022]
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Genetic variation associated with the occurrence and progression of neurological disorders. Neurotoxicology 2017; 61:243-264. [DOI: 10.1016/j.neuro.2016.09.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 09/23/2016] [Indexed: 02/08/2023]
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Walsh S, Donnan J, Fortin Y, Sikora L, Morrissey A, Collins K, MacDonald D. A systematic review of the risks factors associated with the onset and natural progression of epilepsy. Neurotoxicology 2017; 61:64-77. [DOI: 10.1016/j.neuro.2016.03.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 03/14/2016] [Indexed: 01/08/2023]
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Krewski D, Barakat-Haddad C, Donnan J, Martino R, Pringsheim T, Tremlett H, van Lieshout P, Walsh SJ, Birkett NJ, Gomes J, Little J, Bowen S, Candundo H, Chao TK, Collins K, Crispo JAG, Duggan T, El Sherif R, Farhat N, Fortin Y, Gaskin J, Gupta P, Hersi M, Hu J, Irvine B, Jahanfar S, MacDonald D, McKay K, Morrissey A, Quach P, Rashid R, Shin S, Sikora L, Tkachuk S, Taher MK, Wang MD, Darshan S, Cashman NR. Determinants of neurological disease: Synthesis of systematic reviews. Neurotoxicology 2017; 61:266-289. [PMID: 28410962 DOI: 10.1016/j.neuro.2017.04.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 04/03/2017] [Indexed: 02/06/2023]
Abstract
Systematic reviews were conducted to identify risk factors associated with the onset and progression of 14 neurological conditions, prioritized as a component of the National Population Health Study of Neurological Conditions. These systematic reviews provided a basis for evaluating the weight of evidence of evidence for risk factors for the onset and progression of the 14 individual neurological conditions considered. A number of risk factors associated with an increased risk of onset for more than one condition, including exposure to pesticides (associated with an increased risk of AD, amyotrophic lateral sclerosis, brain tumours, and PD; smoking (AD, MS); and infection (MS, Tourette syndrome). Coffee and tea intake was associated with a decreased risk of onset of both dystonia and PD. Further understanding of the etiology of priority neurological conditions will be helpful in focusing future research initiatives and in the development of interventions to reduce the burden associated with neurological conditions in Canada and internationally.
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Affiliation(s)
- Daniel Krewski
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada; Risk Sciences International, Ottawa, Ontario, Canada.
| | | | - Jennifer Donnan
- School of Pharmacy, Memorial University of Newfoundland, Health Science Centre, St. John's, NL, Canada
| | - Rosemary Martino
- Department of Speech-Language Pathology, University of Toronto, Canada; Health Care and Outcomes Research, Krembil Research Institute, University Health Network, Canada; Rehabilitation Sciences Institute, University of Toronto, Canada
| | - Tamara Pringsheim
- Department of Community Health Sciences, University of Calgary, Canada
| | - Helen Tremlett
- Faculty of Medicine (Neurology), Djavad Mowafaghian Centre for Brain Health, Vancouver Coastal Health Research Institute, University of British Columbia, Canada
| | - Pascal van Lieshout
- Department of Speech-Language Pathology, University of Toronto, Canada; Health Care and Outcomes Research, Krembil Research Institute, University Health Network, Canada; Rehabilitation Sciences Institute, University of Toronto, Canada; Department of Psychology, University of Toronto, Canada; Toronto Rehabilitation Institute, University Health Network, Canada
| | - Stephanie J Walsh
- Newfoundland and Labrador Centre for Health Information, 70 O'Leary Avenue, St. John's, NL, Canada
| | - Nicholas J Birkett
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - James Gomes
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Julian Little
- School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Sonya Bowen
- Newfoundland and Labrador Centre for Health Information, 70 O'Leary Avenue, St. John's, NL, Canada
| | - Hamilton Candundo
- Faculty of Health Sciences, University of Ontario Institute of Technology, Canada
| | | | - Kayla Collins
- Newfoundland and Labrador Centre for Health Information, 70 O'Leary Avenue, St. John's, NL, Canada
| | - James A G Crispo
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Tom Duggan
- Faculty of Medicine (Neurology), Djavad Mowafaghian Centre for Brain Health, Vancouver Coastal Health Research Institute, University of British Columbia, Canada
| | - Reem El Sherif
- Department of Family Medicine, McGill University, Montreal, QC, Canada
| | - Nawal Farhat
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Yannick Fortin
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Janet Gaskin
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Pallavi Gupta
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada
| | - Mona Hersi
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Jing Hu
- Department of Community Health Sciences, University of Calgary, Canada
| | - Brittany Irvine
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada
| | - Shayesteh Jahanfar
- School of Population and Public Health, Faculty of Medicine, University of British Columbia, Vancouver, Canada; School of Health Sciences, Central Michigan University, Michigan,United States
| | - Don MacDonald
- Newfoundland and Labrador Centre for Health Information, 70 O'Leary Avenue, St. John's, NL, Canada
| | - Kyla McKay
- Faculty of Medicine (Neurology), Djavad Mowafaghian Centre for Brain Health, Vancouver Coastal Health Research Institute, University of British Columbia, Canada
| | - Andrea Morrissey
- Newfoundland and Labrador Centre for Health Information, 70 O'Leary Avenue, St. John's, NL, Canada
| | - Pauline Quach
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Ruksana Rashid
- Department of Community Health Sciences, University of Calgary, Canada
| | - Sabina Shin
- Department of Pediatrics, McMaster University,Canada
| | - Lindsey Sikora
- Health Sciences Library, University of Ottawa, Ottawa, ON, Canada
| | - Stacey Tkachuk
- Faculty of Medicine (Neurology), Djavad Mowafaghian Centre for Brain Health, Vancouver Coastal Health Research Institute, University of British Columbia, Canada
| | - Mohamed K Taher
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Ming-Dong Wang
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada; School of Epidemiology, Public Health and Preventive Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada; School of Life Science, Changchun Normal University, Changchun, Jilin 130032,China
| | - Shalu Darshan
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Ontario, Canada
| | - Neil R Cashman
- Brain Research Centre, Department of Medicine (Neurology), University of British Columbia, Vancouver, British Columbia,Canada
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Risk factors for the onset and progression of Huntington disease. Neurotoxicology 2017; 61:79-99. [PMID: 28111121 DOI: 10.1016/j.neuro.2017.01.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 01/11/2017] [Indexed: 01/10/2023]
Abstract
Huntington's disease (HD) is an autosomal dominant neurodegenerative disorder characterized by chorea, behavioural and psychiatric manifestations, and dementia, caused by a CAG triplet repeat expansion in the huntingtin gene. Systematic review of the literature was conducted to determine the risk factors for the onset and progression of HD. Multiple databases were searched, using terms specific to Huntington disease and to studies of aetiology, risk, prevention and genetics, limited to studies on human subjects published in English or French between 1950 and 2010. Two reviewers independently screened the abstracts and identified potentially relevant articles for full-text review using predetermined inclusion criteria. Three major categories of risk factors for onset of HD were identified: CAG repeat length in the huntingtin gene, CAG instability, and genetic modifiers. Of these, CAG repeat length in the huntingtin gene is the most important risk factor. For the progression of HD: genetic, demographic, past medical/clinical and environmental risk factors have been studied. Of these factors, genetic factors appear to play the most important role in the progression of HD. Among the potential risk factors, CAG repeat length in the mutant allele was found to be a relatively consistent and significant risk factor for the progression of HD, especially in motor, cognitive, and other neurological symptom deterioration. In addition, there were many consistent results in the literature indicating that a higher number of CAG repeats was associated with shorter survival, faster institutionalization, and earlier percutaneous endoscopic gastrostomy.
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Quach P, El Sherif R, Gomes J, Krewksi D. A systematic review of the risk factors associated with the onset and progression of primary brain tumours. Neurotoxicology 2016; 61:214-232. [PMID: 27212451 DOI: 10.1016/j.neuro.2016.05.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 05/13/2016] [Indexed: 12/17/2022]
Abstract
The overall aim of this systematic review was to identify risk factors for onset and natural progression, which were shown to increase, decrease, or have a null association with risk of primary brain tumour. For onset, the project was separated into two phases. The first phase consisted of a systematic search of existing systematic reviews and meta-analyses. Moderate to high methodological quality reviews were incorporated and summarized with relevant observational studies published since 2010, identified from a systematic search performed in phase 2. For natural progression, only the first phase was conducted. Standard systematic review methodology was utilized. Based on this review, various genetic variants, pesticide exposures, occupational farming/hairdressing, cured meat consumption and personal hair dye use appear to be associated with increased risk of onset amongst adults. The specific EGF polymorphsm 61-A allele within Caucasian populations and having a history of allergy was associated with a decreased risk. For progression, M1B-1 antigen was shown to increase the risk. High birth weight, pesticide exposure (childhood exposure, and parental occupational exposure) and maternal consumption of cured meat during pregnancy may also increase the risk of onset of childhood brain tumours. Conversely, maternal intake of pre-natal supplements (folic acid) appeared to decrease risk. Children with neurofibromatosis 2 were considered to have worse overall and relapse free survival compared to neurofibromatosis 1, as were those children who had grade III tumours compared to lesser grades.
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Affiliation(s)
- Pauline Quach
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, ON, Canada.
| | - Reem El Sherif
- Department of Family Medicine, McGill University, Montreal, QC, Canada
| | - James Gomes
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Canada
| | - Daniel Krewksi
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, ON, Canada; McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada; Risk Sciences International, Ottawa, ON, Canada
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Gaskin J, Gomes J, Darshan S, Krewski D. Burden of neurological conditions in Canada. Neurotoxicology 2016; 61:2-10. [PMID: 27153747 DOI: 10.1016/j.neuro.2016.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 05/02/2016] [Indexed: 11/19/2022]
Abstract
Neurological conditions are among the leading causes of disability in the Canadian population and are associated with a large public health burden. An increase in life expectancy and a declining birth rate has resulted in an aging Canadian population, and the proportion of age-adjusted mortality due to non-communicable diseases has been steadily increasing. These conditions are frequently associated with chronic disability and an increasing burden of care for patients, their families and caregivers. The National Population Health Study of Neurological Conditions (NPHSNC) aims to improve knowledge about neurological conditions and their impacts on individuals, their families, caregivers and health care system. The Systematic Review of Determinants of Neurological Conditions, a specific objective within the NPHSNC, is a compendium of systematic reviews on risk factors affecting onset and progression of the following 14 priority neurological conditions: Alzheimer's disease (AD), amyotrophic lateral sclerosis (ALS), brain tumours (BT), cerebral palsy (CP), dystonia, epilepsy, Huntington's disease (HD), hydrocephalus, multiple sclerosis (MS), muscular dystrophies (MD), neurotrauma, Parkinson's disease (PD), spina bifida (SB), and Tourette's syndrome (TS). The burden of neurological disease is expected to increase as the population ages, and this trend is presented in greater detail for Alzheimer's and Parkinson's disease because the incidence of these two common neurological diseases increases significantly with age over 65 years. This article provides an overview of burden of neurological diseases in Canada to set the stage for the in-depth systematic reviews of the 14 priority neurological conditions presented in subsequent articles in this issue.
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Affiliation(s)
- J Gaskin
- McLaughlin Center for Population Health Risk Assessment, University of Ottawa, Ottawa, ON, Canada; Department of Epidemiology and Community Medicine, Faculty of Medicine, University of Ottawa, ON, Canada.
| | - J Gomes
- McLaughlin Center for Population Health Risk Assessment, University of Ottawa, Ottawa, ON, Canada; Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, ON, Canada; Environmental Health Research Unit, University of Ottawa, ON, Canada
| | - S Darshan
- McLaughlin Center for Population Health Risk Assessment, University of Ottawa, Ottawa, ON, Canada
| | - D Krewski
- McLaughlin Center for Population Health Risk Assessment, University of Ottawa, Ottawa, ON, Canada; Department of Epidemiology and Community Medicine, Faculty of Medicine, University of Ottawa, ON, Canada; Risk Sciences International, Ottawa, ON, Canada
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Martino R, Candundo H, Lieshout PV, Shin S, Crispo JAG, Barakat-Haddad C. Onset and progression factors in Parkinson's disease: A systematic review. Neurotoxicology 2016; 61:132-141. [PMID: 27058967 DOI: 10.1016/j.neuro.2016.04.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 04/04/2016] [Indexed: 12/18/2022]
Abstract
Current research has identified several factors thought to be associated with the onset and progression of Parkinson's Disease (PD); however, whether certain factors contribute to or are protective against PD remains unclear. As such, a systematic search of the literature was performed using variations of MeSH and keyword search terms to identify and summarize systematic reviews and primary studies pertaining to factors associated with the onset and progression of PD. Factors referred to both traditional risk factors and prodromal markers. The following databases were searched: MEDLINE, MEDLINE In-Process, EMBASE, PsycINFO, Scopus, Web of Science, Cochrane Database of Systematic Reviews, Cumulative Index to Nursing and Allied Health Literature (CINAHL), ProQuest Dissertations & Theses, AARP AgeLine, and PDGene. A quality assessment of included systematic reviews was completed using the validated Assessment of the Methodological Quality of Systematic Reviews (AMSTAR) tool. Data extraction targeted reported factors, risk estimates, and 95% confidence intervals (CI). Findings identified 11 systematic reviews of sufficient quality reporting factors for PD onset, and no systematic reviews reporting factors for PD progression. In addition, 93 primary articles were identified, of which, 89 articles addressed factors related to PD onset and 4 articles addressed factors related to the PD progression. Pesticide exposure, rural living, well-water drinking, and farming occupation were consistently found to be positively associated with the onset of PD. Moreover, family history and polymorphisms to key genes were also found to be positively associated with the onset of PD. Conversely, coffee consumption, cigarette smoking, and some polymorphisms were consistently found to be negatively associated with the onset of PD. Urate was the only identified factor linked to the progression of PD; it was mostly found to be negatively associated with PD. In sum, the evidence was systematically found and summarized in the literature pertaining to factors related to the onset and progression of PD.
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Affiliation(s)
- Rosemary Martino
- Department of Speech-Language Pathology, University of Toronto, Toronto, Canada; Rehabilitation Sciences Institute, University of Toronto, Toronto, Canada; Health Care and Outcomes Research, Krembil Research Institute, University Health Network, Toronto, Canada.
| | - Hamilton Candundo
- Faculty of Health Sciences, University of Ontario Institute of Technology, Toronto, Canada
| | - Pascal van Lieshout
- Department of Speech-Language Pathology, University of Toronto, Toronto, Canada; Rehabilitation Sciences Institute, University of Toronto, Toronto, Canada; Department of Psychology, University of Toronto, Toronto, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada; Toronto Rehabilitation Institute, University Health Network, Toronto, Canada
| | - Sabina Shin
- Faculty of Health Sciences, University of Ontario Institute of Technology, Toronto, Canada
| | - James A G Crispo
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Canada
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Donnan J, Walsh S, Fortin Y, Gaskin J, Sikora L, Morrissey A, Collins K, MacDonald D. Factors associated with the onset and progression of neurotrauma: A systematic review of systematic reviews and meta-analyses. Neurotoxicology 2016; 61:234-241. [PMID: 27006002 DOI: 10.1016/j.neuro.2016.03.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 03/11/2016] [Indexed: 01/07/2023]
Abstract
Neurotrauma, including traumatic brain injury (TBI) and spinal cord injury (SCI), is a preventable condition that imposes an important burden on the Canadian society. In this study, the current evidence on risk factors for the onset and progression of neurotrauma is systematically reviewed and synthesized. Searches of the Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effects (DARE), Medline and Medline in Process (via OVID), EMBASE and PsycINFO from inception to February 2013 were conducted to identify relevant systematic reviews and meta-analyses published in English or French. Two referees screened and assessed the quality of the studies using the AMSTAR tool. Thirty-two studies examined at least one risk factor for the onset of neurotrauma. Thirteen studies passed the quality assessment and the majority evaluated the impact of protective equipment in sports. Helmets effectively reduce TBI from bicycling, skiing, snowboarding, ice hockey and motorcycling. There was no evidence of a protective effect of helmets for SCI. No studies contributed evidence on risk factors for the onset of SCI. Of two studies examining risk factors for the progression of neurotrauma, only injury severity was found to be associated with poorer post-injury outcomes. Substantial evidence supports the use of helmets for the prevention of TBI in sports and motorcycling and face shields in ice hockey. Addressing bicycle helmet legislation across Canada may be an effective option for reducing TBI caused by bicycle accidents. Limited evidence on relevant risk factors for spinal cord injuries and neurotrauma progression was available.
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Affiliation(s)
- Jennifer Donnan
- School of Pharmacy, Memorial University of Newfoundland, Health Science Centre, St. John's, NL, Canada.
| | - Stephanie Walsh
- Newfoundland and Labrador Centre for Health Information, St. John's, NL, Canada
| | - Yannick Fortin
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, ON, Canada
| | - Janet Gaskin
- McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, ON, Canada
| | - Lindsey Sikora
- Health Sciences Library, University of Ottawa, Ottawa, ON, Canada
| | - Andrea Morrissey
- School of Pharmacy, Memorial University of Newfoundland, Health Science Centre, St. John's, NL, Canada
| | - Kayla Collins
- School of Pharmacy, Memorial University of Newfoundland, Health Science Centre, St. John's, NL, Canada
| | - Don MacDonald
- School of Pharmacy, Memorial University of Newfoundland, Health Science Centre, St. John's, NL, Canada
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