As Her2/Neu overexpression as well as EMT are often associated with cancer chemoresistance [51, 52], our present finding that NeuT-transformed cells were sensitive to ALA-mediated PDT together with previous studies of PDT on chemoresistant cancer cells (as reviewed in [53]) highlights the promise of using PDT to overcome cancer chemoresistance. The gene discussed is ERBB2; the disease is cancer.