Abstract
Senescence-associated β-galactosidase (SAβ-gal) is a convenient histological technique used to identify senescent cells. Its ease of use is helpful to initially screen and detect senescent cells in heterogeneous cell populations both in vitro and in vivo. However, SAβ-gal staining is not an unequivocal marker of the senescent state, and diagnosis of such usually requires additional markers demonstrating an absence of proliferation and expression of cell-cycle inhibitors. Nonetheless, SAβ-gal remains one of the most widely used biomarkers of senescent cells. Recently, by measuring SAβ-gal activity, the expression of the cyclin-dependent kinase inhibitor p21 (waf1/cip1) and demonstrating a lack of proliferation, we identified senescent cells in the developing embryo. This chapter describes the methods for identifying cellular senescence in the embryo, detailing protocols for the detection of SAβ-gal activity in both sections and at the whole mount level, and immunohistochemistry protocols for the detection of additional biomarkers of senescence.
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Acknowledgments
This work was funded by Grants SAF2010-18829 and SAF2013-49082-P to W.M.K. from the Spanish Ministry for Economy and Competitiveness, the Agència de Gestió d’Ajuts Universitaris i de Recerca (AGAUR) from the Generalitat de Catalunya, and CRG core funding.
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Storer, M., Keyes, W.M. (2017). Detection of Senescence Markers During Mammalian Embryonic Development. In: Nikiforov, M. (eds) Oncogene-Induced Senescence. Methods in Molecular Biology, vol 1534. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-6670-7_19
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DOI: https://doi.org/10.1007/978-1-4939-6670-7_19
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