Monocyte Epigenetic Aging Linked to Cognitive Depression Symptoms

Overview

• The peer-reviewed study, published Monday in The Journals of Gerontology Series A, found that faster aging in monocytes was associated with non-somatic depression symptoms in women with and without HIV.
• Researchers analyzed blood and survey data from 440 participants in the Women’s Interagency HIV Study, estimating biological age with epigenetic clocks that read chemical tags on DNA.
• The monocyte-specific clock aligned with anhedonia, hopelessness, and feelings of failure, while a broad multi-tissue clock showed no link to any depression domain.
• The study used CES-D scores to separate mood and thinking problems from physical complaints, revealing a signal tied to psychological symptoms rather than fatigue or appetite changes.
• The work is cross-sectional and modest in size, so it cannot show cause or timing, and the authors urge replication and long-term studies before any blood test could guide care, especially for patients living with HIV who face high depression rates.