Serum-based biomarkers and GDS-30 score and subscales of depressive symptoms were examined in a cross-sectional sample of 81 elderly men drawn from the TARCC cohort. Measurements included neuropsychological assessment and serum. Thirty three patients met consensus diagnosis for probable AD and forty eight were cognitively intact. Although initial regression analysis of all subjects showed significant relationships between depression and specific biomarkers, analyses based on diagnosis indicated that none of the biomarkers were significantly associated with depression among the controls. Among AD males MIF was significantly associated with total GDS scores and subscales of dysphoria, meaninglessness, and cognitive impairment. TNF-α was significantly associated with the apathy in AD males. Higher levels of MIF were associated with less depression in AD men. TNF-α was positively associated with degree of apathy. This study suggests the importance of cognitive status, gender and subtypes of depression when investigating biomarkers and depression in the elderly.
KeywordsDepressionBiomarkersAlzheimer’s
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