Abstract
Inhibitors of proteasome induced premature senescence in normal human fibroblasts. Besides morphological alteration and expression of senescence marker genes, these cells manifested senescence-associated heterochromatic foci under staining of the nuclei with DAPI similar to normally senescent cells. These results suggest that declining ability in protein degradation may be involved in the formation of heterochromatic foci in senescent fibroblasts.
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