Homocysteine and Dementia: An International Consensus Statement

Identification of modifiable risk factors provides a crucial approach to the prevention of dementia. Nutritional or nutrient-dependent risk factors are especially important because dietary modifications or use of dietary supplements may lower the risk factor level. One such risk factor is a raised c...

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Vydané v:Journal of Alzheimer's disease Ročník 62; číslo 2; s. 561
Hlavní autori: Smith, A David, Refsum, Helga, Bottiglieri, Teodoro, Fenech, Michael, Hooshmand, Babak, McCaddon, Andrew, Miller, Joshua W, Rosenberg, Irwin H, Obeid, Rima
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Netherlands 01.01.2018
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ISSN:1875-8908, 1875-8908
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Abstract Identification of modifiable risk factors provides a crucial approach to the prevention of dementia. Nutritional or nutrient-dependent risk factors are especially important because dietary modifications or use of dietary supplements may lower the risk factor level. One such risk factor is a raised concentration of the biomarker plasma total homocysteine, which reflects the functional status of three B vitamins (folate, vitamins B12, B6). A group of experts reviewed literature evidence from the last 20 years. We here present a Consensus Statement, based on the Bradford Hill criteria, and conclude that elevated plasma total homocysteine is a modifiable risk factor for development of cognitive decline, dementia, and Alzheimer's disease in older persons. In a variety of clinical studies, the relative risk of dementia in elderly people for moderately raised homocysteine (within the normal range) ranges from 1.15 to 2.5, and the Population Attributable risk ranges from 4.3 to 31%. Intervention trials in elderly with cognitive impairment show that homocysteine-lowering treatment with B vitamins markedly slows the rate of whole and regional brain atrophy and also slows cognitive decline. The findings are consistent with moderately raised plasma total homocysteine (>11 μmol/L), which is common in the elderly, being one of the causes of age-related cognitive decline and dementia. Thus, the public health significance of raised tHcy in the elderly should not be underestimated, since it is easy, inexpensive, and safe to treat with B vitamins. Further trials are needed to see whether B vitamin treatment will slow, or prevent, conversion to dementia in people at risk of cognitive decline or dementia.
AbstractList Identification of modifiable risk factors provides a crucial approach to the prevention of dementia. Nutritional or nutrient-dependent risk factors are especially important because dietary modifications or use of dietary supplements may lower the risk factor level. One such risk factor is a raised concentration of the biomarker plasma total homocysteine, which reflects the functional status of three B vitamins (folate, vitamins B12, B6). A group of experts reviewed literature evidence from the last 20 years. We here present a Consensus Statement, based on the Bradford Hill criteria, and conclude that elevated plasma total homocysteine is a modifiable risk factor for development of cognitive decline, dementia, and Alzheimer's disease in older persons. In a variety of clinical studies, the relative risk of dementia in elderly people for moderately raised homocysteine (within the normal range) ranges from 1.15 to 2.5, and the Population Attributable risk ranges from 4.3 to 31%. Intervention trials in elderly with cognitive impairment show that homocysteine-lowering treatment with B vitamins markedly slows the rate of whole and regional brain atrophy and also slows cognitive decline. The findings are consistent with moderately raised plasma total homocysteine (>11 μmol/L), which is common in the elderly, being one of the causes of age-related cognitive decline and dementia. Thus, the public health significance of raised tHcy in the elderly should not be underestimated, since it is easy, inexpensive, and safe to treat with B vitamins. Further trials are needed to see whether B vitamin treatment will slow, or prevent, conversion to dementia in people at risk of cognitive decline or dementia.Identification of modifiable risk factors provides a crucial approach to the prevention of dementia. Nutritional or nutrient-dependent risk factors are especially important because dietary modifications or use of dietary supplements may lower the risk factor level. One such risk factor is a raised concentration of the biomarker plasma total homocysteine, which reflects the functional status of three B vitamins (folate, vitamins B12, B6). A group of experts reviewed literature evidence from the last 20 years. We here present a Consensus Statement, based on the Bradford Hill criteria, and conclude that elevated plasma total homocysteine is a modifiable risk factor for development of cognitive decline, dementia, and Alzheimer's disease in older persons. In a variety of clinical studies, the relative risk of dementia in elderly people for moderately raised homocysteine (within the normal range) ranges from 1.15 to 2.5, and the Population Attributable risk ranges from 4.3 to 31%. Intervention trials in elderly with cognitive impairment show that homocysteine-lowering treatment with B vitamins markedly slows the rate of whole and regional brain atrophy and also slows cognitive decline. The findings are consistent with moderately raised plasma total homocysteine (>11 μmol/L), which is common in the elderly, being one of the causes of age-related cognitive decline and dementia. Thus, the public health significance of raised tHcy in the elderly should not be underestimated, since it is easy, inexpensive, and safe to treat with B vitamins. Further trials are needed to see whether B vitamin treatment will slow, or prevent, conversion to dementia in people at risk of cognitive decline or dementia.
Identification of modifiable risk factors provides a crucial approach to the prevention of dementia. Nutritional or nutrient-dependent risk factors are especially important because dietary modifications or use of dietary supplements may lower the risk factor level. One such risk factor is a raised concentration of the biomarker plasma total homocysteine, which reflects the functional status of three B vitamins (folate, vitamins B12, B6). A group of experts reviewed literature evidence from the last 20 years. We here present a Consensus Statement, based on the Bradford Hill criteria, and conclude that elevated plasma total homocysteine is a modifiable risk factor for development of cognitive decline, dementia, and Alzheimer's disease in older persons. In a variety of clinical studies, the relative risk of dementia in elderly people for moderately raised homocysteine (within the normal range) ranges from 1.15 to 2.5, and the Population Attributable risk ranges from 4.3 to 31%. Intervention trials in elderly with cognitive impairment show that homocysteine-lowering treatment with B vitamins markedly slows the rate of whole and regional brain atrophy and also slows cognitive decline. The findings are consistent with moderately raised plasma total homocysteine (>11 μmol/L), which is common in the elderly, being one of the causes of age-related cognitive decline and dementia. Thus, the public health significance of raised tHcy in the elderly should not be underestimated, since it is easy, inexpensive, and safe to treat with B vitamins. Further trials are needed to see whether B vitamin treatment will slow, or prevent, conversion to dementia in people at risk of cognitive decline or dementia.
Author Bottiglieri, Teodoro
Miller, Joshua W
Smith, A David
Obeid, Rima
Refsum, Helga
Fenech, Michael
Hooshmand, Babak
McCaddon, Andrew
Rosenberg, Irwin H
Author_xml – sequence: 1
  givenname: A David
  surname: Smith
  fullname: Smith, A David
  organization: OPTIMA, Department of Pharmacology, University of Oxford, Oxford, UK
– sequence: 2
  givenname: Helga
  surname: Refsum
  fullname: Refsum, Helga
  organization: Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Norway
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  givenname: Teodoro
  surname: Bottiglieri
  fullname: Bottiglieri, Teodoro
  organization: Center of Metabolomics, Institute of Metabolic Disease, Baylor Scott & White Research Institute, Dallas, TX, USA
– sequence: 4
  givenname: Michael
  surname: Fenech
  fullname: Fenech, Michael
  organization: Genome Health and Personalised Nutrition Laboratory, CSIRO Health and Biosecurity, Adelaide BC, SA, Australia
– sequence: 5
  givenname: Babak
  surname: Hooshmand
  fullname: Hooshmand, Babak
  organization: Aging Research Centre, Department of Neurobiology, Care Sciences and Society, Karolinska Institute, Stockholm, Sweden
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  givenname: Andrew
  surname: McCaddon
  fullname: McCaddon, Andrew
  organization: Cardiff University, School of Medicine, Gwenfro Units 6/7, Wrexham, UK
– sequence: 7
  givenname: Joshua W
  surname: Miller
  fullname: Miller, Joshua W
  organization: Department of Nutritional Sciences, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
– sequence: 8
  givenname: Irwin H
  surname: Rosenberg
  fullname: Rosenberg, Irwin H
  organization: Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA
– sequence: 9
  givenname: Rima
  surname: Obeid
  fullname: Obeid, Rima
  organization: Department of Clinical Chemistry and Laboratory Medicine, University Hospital of the Saarland, Germany
BackLink https://www.ncbi.nlm.nih.gov/pubmed/29480200$$D View this record in MEDLINE/PubMed
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Keywords folate
risk-factor
cobalamin
Alzheimer’s disease
causation
brain atrophy
vitamin B6
dementia
cognitive impairment
vitamin B12
Homocysteine
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  year: 2018
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PublicationDecade 2010
PublicationPlace Netherlands
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PublicationTitle Journal of Alzheimer's disease
PublicationTitleAlternate J Alzheimers Dis
PublicationYear 2018
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Snippet Identification of modifiable risk factors provides a crucial approach to the prevention of dementia. Nutritional or nutrient-dependent risk factors are...
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StartPage 561
SubjectTerms Cognition - drug effects
Cognitive Dysfunction - blood
Cognitive Dysfunction - prevention & control
Consensus
Dementia - blood
Dementia - prevention & control
Dietary Supplements
Homocysteine - blood
Humans
Meta-Analysis as Topic
Review Literature as Topic
Risk Factors
Vitamin B Complex - therapeutic use
Title Homocysteine and Dementia: An International Consensus Statement
URI https://www.ncbi.nlm.nih.gov/pubmed/29480200
https://www.proquest.com/docview/2008359563
Volume 62
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