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Senescent Cell Detection Kit
K Kit Components:
SCD
Buffer: 150 ml, store at 4ºC
Ferricyanide: 10
ml, store at 4ºC
Ferrocyanide: 10
ml, store at 4ºC
X-gal: 4 ml, store
at -20ºC
Product Description: Cellular senescence plays a critical in tumor
suppression. Normal mitotic somatic cells gradually cease division after
continuous
expansion in culture and enter a state referred to as replicative aging or
senescence, exhibiting a Hayflick limit of ~50 population
doublings
(Exp Cell Res 37:614, 1965). It has been suggested that various changes
associated with cellular aging may be closely mediated by
actin
cytoskeleton organization and focal adhesions among cells and extracellular
matrix. Senescent cells typically exhibit an enlarged flattened
“frying
egg” morphology associated with increased activity of acidic beta-galactosidase
(J Cell Sci 113:3613, 2000). The increased activity of
lysosomal
acid beta-galactosidase is usually detected at pH 6, and constitutes the basis
of the Senescent Cell Detection assay using the
histochemical
substrate 5-bromo-4-chloro-3-indolyl-b-D-galactopyranoside (Xgal) for in situ
cell staining. The assay kit is sufficient for 300 - 500
assays. Note
that the fixative is not included in the kit.