In a recent work reported in Science, Zhang et al. untangle dynamic changes arising across aging in multiple cell populations within thirteen organs using single-cell transcriptomics and identify four distinct dynamic waves in which immune cells are the most affected
DOI: 10.1101/2024.01.26.577360
PMID:
Neutrophils are the most abundant leukocytes in the blood, with numbers further increasing with age. Despite their essential role as a primary line of defense, neutrophils can contribute to tissue damage and age-related diseases 1 and a high neutrophil-to-lymphocyte ratio predicts all causes of mortality in the elderly 2–5. However, the precise mechanisms driving enhanced
3(5):475-476.
DOI: 10.1038/s43587-023-00412-2.
PMID: 37198439
The mysteries behind immune aging and its related inflammation are being unmasked. Jin et al. reveal that the defective turnover of damaged mitochondria in CD4+ T cells from older individuals results in the exacerbated secretion of mitochondrial DNA, which fuels inflammaging and impairs immune