Elevation of plasma concentration of adhesion molecules in late-life depression

Area of Science:

• Gerontology
• Psychiatry
• Cardiovascular Medicine

Background:

• Late-life depression is a significant public health concern.
• Vascular disease is increasingly recognized as a potential contributor to depression in older adults.
• Soluble adhesion molecules, such as sICAM-1 and sVCAM-1, are markers of inflammation and endothelial dysfunction.

Purpose of the Study:

• To investigate the association between late-life depression and vascular disease.
• To determine serum levels of soluble intercellular adhesion molecule-1 (sICAM-1) and soluble vascular cell adhesion molecule-1 (sVCAM-1) in elderly individuals with depression.
• To assess these molecules as potential markers of ischemia-induced inflammation in geriatric depression.

Main Methods:

• A case-control study was conducted with 33 elderly subjects diagnosed with depression and 33 matched healthy controls.
• Participants were community-dwelling individuals screened using the Geriatric Depression Scale.
• Serum concentrations of sICAM-1 and sVCAM-1 were measured using standardized assays.

Main Results:

• Depressed individuals exhibited significantly higher serum levels of sICAM-1 compared to controls (674.94 ± 166.90 ng/mL vs 467.05 ± 231.26 ng/mL, p < 0.01).
• Elevated serum levels of sVCAM-1 were also observed in the depressed group compared to controls (572.14 ± 182.20 ng/mL vs 449.04 ± 285.27 ng/mL, p < 0.05).
• These significant differences persisted after adjusting for potential confounders including gender, smoking status, and metabolic syndrome.

Conclusions:

• The study demonstrates a significant association between elevated serum levels of sICAM-1 and sVCAM-1 and depression in the elderly population.
• These findings provide further support for the vascular depression hypothesis.
• The results have implications for understanding the pathophysiology and potential therapeutic targets for late-life depression.