People with depression have altered T cell functioning

The scientific literature consistently supports the claim that depression is associated with altered T cell functioning. Several studies have documented specific changes in T cell subsets and their activity in individuals with major depressive disorder (MDD). For example, reports increased T cell activation alongside deficits in regulatory T cells (Tregs) correlating with depression severity.nature.comnature.comT cell activation and deficits in T regulatory cells are associated with major...

highlights an expansion of pro-inflammatory Th17-like cells and a decrease in CD39+ Treg subsets in depressed patients, particularly in the context of multiple sclerosis.sciencedirect.comsciencedirect.comReduced numbers of naïve CD4 + T cells and an altered CD4/CD8 balance in... notes altered CD4/CD8 T cell balance and reduced naïve CD4+ T cells in depressed patients with immune deficiencies. Additional sources emphasize the role of immune dysregulation and specifically regulatory T cells in depression's pathophysiology.link.springer.comlink.springer.comMajor depression favors the expansion of Th17-like cells and decrease the...+4 more

Moreover, discusses the immunological roots of depression and the potential for immune-targeted therapies, reinforcing the biological relevance of these T cell alterations. While some studies focus on specific subtypes or comorbid conditions (e.g., postpartum depression in or bipolar disorder in ), the overarching theme is that depression involves measurable changes in T cell function and phenotype.nature.comnature.comImmune targets for therapeutic development in depression: towards precision...sciencedirect.comsciencedirect.comT-cell defects and postpartum depression+1 more

These findings collectively indicate that altered T cell functioning is a characteristic feature of depression rather than an incidental or unverified association.