Induction and Validation of Cellular Senescence in Primary Human Cells

Alejandra Hernandez-Segura, Simone Brandenburg, Marco Demaria

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Cellular senescence is a state of permanent cell cycle arrest activated in response to different damaging stimuli. Activation of cellular senescence is a hallmark of various pathophysiological conditions including tumor suppression, tissue remodeling and aging. The inducers of cellular senescence in vivo are still poorly characterized. However, a number of stimuli can be used to promote cellular senescence ex vivo. Among them, most common senescence-inducers are replicative exhaustion, ionizing and non-ionizing radiation, genotoxic drugs, oxidative stress, and demethylating and acetylating agents. Here, we will provide detailed instructions on how to use these stimuli to induce fibroblasts into senescence. This protocol can easily be adapted for different types of primary cells and cell lines, including cancer cells. We also describe different methods for the validation of senescence induction. In particular, we focus on measuring the activity of the lysosomal enzyme Senescence-Associated β-galactosidase (SA-β-gal), the rate of DNA synthesis using 5-ethynyl-2'-deoxyuridine (EdU) incorporation assay, the levels of expression of the cell cycle inhibitors p16 and p21, and the expression and secretion of members of the Senescence-Associated Secretory Phenotype (SASP). Finally, we provide example results and discuss further applications of these protocols.

Original languageEnglish
Article number57782
Number of pages10
JournalJournal of visualized experiments : JoVE
Volume136
DOIs
Publication statusPublished - 20-Jun-2018

Keywords

  • Cell Line/cytology
  • Cellular Senescence/physiology
  • Humans

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