Which heat shock protein is found to be upregulated during Hsp90 inhibition?
['HSP90 inhibition was associated with decreased neuroendocrine ErbB and IGF-I receptor expression, decreased Erk and Akt phospho-rylation and the induction of HSP70 expression.', 'Inhibition of Hsp90 upregulated the expression of Hsp70 and Hsp70-bound Nox2, 5 and promoted degradation.', 'Conversely, inhibition of HSP90 significantly increased the expression of both VEGF and HGF mRNA, and induced HSP70 protein in PHH cultures in vitro.']
['HSP90 inhibition was found to be associated with induction of HSP70 expression.']
['HSP70']