Researchers studying 563 adults found that arterial stiffness is linked to a previously unrecognized immune pattern driven by CD4+ T cells — not the CD8+ memory expansion typical of immune aging. People with stiffer arteries showed paradoxically higher T cell receptor diversity, driven by expanded low-frequency CD4+ clones in an early, naive-like state. Single-cell analysis revealed these cells are chronically activated yet unable to proliferate effectively. A machine learning model built on these immune features identified high arterial stiffness with strong accuracy (AUC = 0.817). The findings suggest a new immune pathway — called vascular immune remodeling — that may be targetable for early cardiovascular risk detection and prevention.
