Plasma and cerebrospinal fluid amyloid-β levels in late-life depression: A systematic review and meta-analysis.
This study aimed to evaluate differences in plasma and cerebrospinal fluid (CSF) levels of Aβ peptides in older adults with late-life depression compared to non-depressed older controls. We conducted a systematic review and meta-analysis of the literature using PubMed, Web of science and Scopus databases with no search limits for publication dates or languages. Two independent reviewers extracted data and assessed quality. Six hundred references were retrieved, and we included 12 studies in the meta-analysis after eligibility screening. Older adults with late-life depression (LLD) had a higher plasma Aβ40:Aβ42 ratio compared to non-depressed participants (SMD = 1.10, CI95% [0.28; 1.96], p = 0.01), and marginally significant reduction of CSF Aβ42 levels (SMD = -1.12, CI95% [-2.47; 0.22], p = 0.1). The present results evidence that older adults with depression have significant differences in Aβ metabolism, in the same direction observed in individuals with AD. These differences in the Aβ metabolism may help identify a subgroup of subjects with LLD at higher risk of developing AD.
National Institute of Science and Technology in Molecular Medicine, Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
Kenia Kelly Fiaux do
KK
Nascimento
National Institute of Science and Technology in Molecular Medicine, Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
Kelly P
KP
Silva
National Institute of Science and Technology in Molecular Medicine, Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil; Department of Mental Health, Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
Leandro F
LF
Malloy-Diniz
Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
Meryl A
MA
Butters
National Institute of Science and Technology in Molecular Medicine, Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil; Department of Mental Health, Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil. Electronic address: brenosatler@gmail.com.
Breno S
BS
Diniz
D017668:Age of Onset; D000368:Aged; D016229:Amyloid beta-Peptides / Q000097:blood* / Q000134:cerebrospinal fluid*; D003866:Depressive Disorder / Q000097:blood* / Q000134:cerebrospinal fluid*; D006801:Humans; D010446:Peptide Fragments / Q000097:blood* / Q000134:cerebrospinal fluid*
D016229:Amyloid beta-Peptides; D010446:Peptide Fragments; C078592:amyloid beta-protein (1-40); C075222:amyloid beta-protein (1-42)
Amyloid-β; Cerebrospinal fluid; Dementia; Late-life depression; Meta-analysis; Plasma