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Autoantibodies are not Predictive Markers for the Development of Depressive Symptoms in a Population-Based Cohort of Older Adults
Published online by Cambridge University Press: 15 July 2015
Abstract
Autoantibodies have been implicated in the etiologic pathway of depressive disorders. Here, we determine the association between the presence of a panel of autoantibodies at baseline and change in depression symptom score over 5-year follow-up in a cohort of healthy elderly Australians.
Serum samples from 2049 randomly selected subjects enrolled in the Hunter Community Study (HCS) aged 55–85 years were assayed for a range of autoimmune markers (anti-nuclear autoantibodies, extractable nuclear antigen autoantibodies, anti-neutrophil cytoplasmic autoantibodies, thyroid peroxidase autoantibodies, tissue transglutaminase autoantibodies, anti-cardiolipin autoantibodies, rheumatoid factor and cyclic citrullinated peptide autoantibodies) at baseline. Depression symptom score was assessed using the Centre for Epidemiological Study (CES-D) scale at baseline and 5 years later.
Autoantibody prevalence varied amongst our sample with ANA being the most prevalent; positive in 16% and borderline in 36% of study population. No evidence for a relationship was found between change in CES-D score over time and any autoimmune marker. Statins and high cholesterol were significantly associated with change in CES-D score over time in univariate analysis; however, these were probably confounded since they failed to remain significant following multivariable analysis.
Autoantibodies were not associated with change in CES-D score over time. These findings point to an absence of autoimmune mechanisms in the general population or in moderate cases of depression.
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- Copyright © Elsevier Masson SAS 2015
Footnotes
Abbreviations: CES-D, Centre for Epidemiological Study Depression; SLE, Systemic lupus erythematosus; ANA, Anti-nuclear autoantibodies; ENA, Extractable nuclear antigen autoantibodies; Sm, Anti-Smith; RNP, Ribo-nucleoprotein; SS-A, Sjogren's Syndrome A; SS-B, Sjogren's Syndrome B; SCL-70, Topoisomerase-I; JO-1, Autoantibodies against amino acyl-tRNA synthetases; IgG, Immunoglobulin G; IgA, Immunoglobulin A; ANCA, Anti-neutrophil cytoplasmic autoantibodies; TPO-Ab, Thyroid peroxidase autoantibodies; TTG-Ab, Tissue transglutaminase autoantibodies; ACGA, Anti-cardiolipin autoantibodies; RHF, Rheumatoid factor; CCP-Ab, Cyclic citrullinated peptide autoantibodies; hsCRP, High sensitivity C-reactive protein; DNA, Deoxyribonucleic acid; HCS, Hunter community study; LDL, Low-density lipoprotein; TGs, Triglycerides; BMI, Body Mass Index; PAL, Physical activity level; ARFS, Australian Recommended Food Score; FFQ, Food Frequency Questionnaire; DQESv2, Dietary Questionnaire for Epidemiological Studies version 2; AGHE, Australian Guide to Healthy Eating; ELISA, Enzyme-Linked Immunosorbent Assay; GPL, IgG phospholipid units; IU/mL, International unit per millilitre; EU/mL, Enzyme immunoassay units per millilitre; SD, Standard deviation; DAGs, Directed Acyclic Graphs; CNS, Central nervous system.
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