Cellular senescence as a possible link between prostate diseases of the ageing male

Senescent cells accumulate with age in all tissues. Although senescent cells undergo cell-cycle arrest, these cells remain metabolically active and their secretome — known as the senescence-associated secretory phenotype — is responsible for a systemic pro-inflammatory state, which contributes to an inflammatory microenvironment. Senescent cells can be found in the ageing prostate and the senescence-associated secretory phenotype and can be linked to BPH and prostate cancer. Indeed, a number of signalling pathways provide biological plausibility for the role of senescence in both BPH and prostate cancer, although proving causality is difficult. The theory of senescence as a mechanism for prostate disease has a number of clinical implications and could offer opportunities for targeting in the future. Senescent cells and their secretome — the senescence-associated secretory phenotype (SASP) — cause a systemic pro-inflammatory state, contributing to an inflammatory microenvironment. In this article, the authors discuss the presence of senescent cells and the SASP in the ageing prostate and the evidence for a role of senescence in BPH and prostate cancer, as well as possible therapeutic targeting of these pathways in the future.