Correlation of cellular levels of Hsp72 with susceptibility to STS-induced apoptosis.

Data are shown separately for undifferentiated and neuron-like SH-SY5Y cells after the treatments indicated.
PC indicates thermal preconditioning.
Hsp72-Vector indicates ectopic expression of Hsp72 as stably transfected cells (5YHSP72.1).
Hsp72 Level indicates that measured by western immunoblotting analysis (Figure 2), normalized to undifferentiated untransfected SH-SY5Y cells (data are expressed as the ratio relative to that control).
Apoptotic Index is the percentage of cells displaying apoptotic nuclei after treatment with STS (50 nM) for 12 h.