Transfer of omega-3 fatty acids across the blood-brain barrier after dietary supplementation with a docosahexaenoic acid-rich omega-3 fatty acid preparation in patients with Alzheimer's disease: the OmegAD study.
J Intern Med
; 275(4): 428-36, 2014 Apr.
Article
em En
| MEDLINE
| ID: mdl-24410954
ABSTRACT
OBJECTIVE:
Little is known about the transfer of essential fatty acids (FAs) across the human blood-brain barrier (BBB) in adulthood. In this study, we investigated whether oral supplementation with omega-3 (n-3) FAs would change the FA profile of the cerebrospinal fluid (CSF).METHODS:
A total of 33 patients (18 receiving the n-3 FA supplement and 15 receiving placebo) were included in the study. These patients were participants in the double-blind, placebo-controlled randomized OmegAD study in which 204 patients with mild Alzheimer's disease (AD) received 2.3 g n-3 FA [high in docosahexaenoic acid (DHA)] or placebo daily for 6 months. CSF FA levels were related to changes in plasma FA and to CSF biomarkers of AD and inflammation.RESULTS:
At 6 months, the n-3 FA supplement group displayed significant increases in CSF (and plasma) eicosapentaenoic acid (EPA), DHA and total n-3 FA levels (P < 0.01), whereas no changes were observed in the placebo group. Changes in CSF and plasma levels of EPA and n-3 docosapentaenoic acid were strongly correlated, in contrast to those of DHA. Changes in DHA levels in CSF were inversely correlated with CSF levels of total and phosphorylated tau, and directly correlated with soluble interleukin-1 receptor type II. Thus, the more DHA increased in CSF, the greater the change in CSF AD/inflammatory biomarkers.CONCLUSIONS:
Oral supplementation with n-3 FAs conferred changes in the n-3 FA profile in CSF, suggesting transfer of these FAs across the BBB in adults.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Barreira Hematoencefálica
/
Ácidos Graxos Ômega-3
/
Ácido Eicosapentaenoico
/
Ácidos Docosa-Hexaenoicos
/
Suplementos Nutricionais
/
Doença de Alzheimer
Tipo de estudo:
Clinical_trials
/
Observational_studies
/
Prognostic_studies
Limite:
Adult
/
Humans
Idioma:
En
Revista:
J Intern Med
Assunto da revista:
MEDICINA INTERNA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Suécia