Senescent cell-derived extracellular vesicles as potential mediators of innate immunosenescence and inflammaging

Jan 18, 2024Experimental gerontology

Cell particles from aging cells may contribute to weaker immune response and chronic inflammation

AI simplified

Longevity & Aging on OpenScience ↗PubMed ↗DOI ↗

Abstract

Extracellular vesicles (EVs) from senescent cells may alter immune function and contribute to age-related diseases.

Ageing is linked to a decline in immune function, increased inflammation, and a rise in senescent cells.
Senescent cell derived EVs (SEVs) contain different molecular components compared to EVs from non-senescent cells.
Changes in the cargo of EVs throughout life may affect innate immune responses, potentially leading to immunosenescence.
Higher concentrations of specific miRNAs, lipids, and proteins in SEVs may influence inflammation and immune functions.
Senolytics could potentially restore plasma EV content to resemble that of non-senescent cells, offering a strategy to counteract the negative effects of SEVs on immune function.

AI simplified

Ageing is accompanied by a decline in immune function (immunosenescence), increased inflammation (inflammaging), and more senescent cells which together contribute to age-related disease and infection susceptibility. The innate immune system is the front-line defence against infection and cancer and is also involved in the removal of senescent cells, so preventing innate immunosenescence and inflammaging is vital for health in older age. Extracellular vesicles (EVs) modulate many aspects of innate immune function, including chemotaxis, anti-microbial responses, and immune regulation. Senescent cell derived EVs (SEVs) have different cargo to that of non-senescent cell derived EVs, suggesting alterations in EV cargo across the lifespan may influence innate immune function, possibly contributing to immunosenescence and inflammaging. Here we review current understanding of the potential impact of miRNAs, lipids and proteins, found in higher concentrations in SEVs, on innate immune functions and inflammation to consider whether SEVs are potential influencers of innate immunosenescence and inflammaging. Furthermore, senolytics have demonstrated an ability to return plasma EV content closer to that of non-senescent EVs, therefore the potential use of senotherapeutics (senolytics and senostatics) to ameliorate the effects of SEVs on immunosenescence and inflammaging is also considered as a possible strategy for extending health-span in older adults.

Full Text

Full text is available at the source.

View full text (XML) ↗View full text ↗

Senescent cell-derived extracellular vesicles as potential mediators of innate immunosenescence and inflammaging

Abstract

Full Text

You found one interesting study. We’ll send the next 7.

what lands in your inbox each week:

Recent issues from the longevity & aging brief

Abstract

Full Text

Related papers

You found one interesting study. We’ll send the next 7.

what lands in your inbox each week:

Recent issues from the longevity & aging brief