Nature agingOct 7, 2025

CD4 T cells gain Eomesodermin to influence cell aging and aging processes

Longevity & Aging Weekly Brief ↗PubMed ↗DOI ↗

Updated Jun 27, 2026

Abstract

Essence

CD4 T cells appear to acquire an Eomes-positive state that helps restrain senescent-cell buildup during aging and chronic liver inflammation.

Evidence

Experimental aging and liver-cirrhosis models found that senescent-cell-rich environments induced CD4-Eomes cells, while deleting Eomes in CD4 T cells increased senescent cells, physical decline, shortened lifespan, fibrosis, and disease severity.

Caveat

The abstract does not show whether manipulating CD4-Eomes cells improves human aging or cirrhosis outcomes.

Simplified

Aging is characterized by the progressive deterioration of tissue structure and function, leading to increased vulnerability to diseases. Senescent cells (SCs) accumulate with age, but how the immune system regulates their burden is unclear. Here we show that CD4 T cells differentiate into Eomesodermin (Eomes)CCL5T lymphocytes (CD4-Eomes) in a SC-rich environment and that a reduction in the SC load, achieved using senolytic drugs, was sufficient to halt this differentiation. We further demonstrate that eliminating CD4-Eomes cells at advanced age by selectively deleting the Eomes transcription factor in CD4 T cells results in increased accumulation of SCs, profound physical deterioration and a decreased lifespan. In liver cirrhosis, a model of localized chronic inflammation, CD4-Eomes cell elimination increased fibrosis, SC load and worsened the disease. Collectively, our findings demonstrate the fundamental role of CD4-Eomes cells in modulating tissue senescence, with implications for age-related diseases and longevity. + +