HSPA1A and lentivirus infection: shHsp70 lentivirus infection reduced the Hsp70 level to 10.53% ± 1.59% for A431 cells, 18.52% ± 3.54% in A549 cells, and 36.23% ± 1.66% for DLD1 cells (all compared to control levels; Figure 1A,B).