Li et al. [19] screened a group of lncRNA microarrays involving trastuzumab-resistant SKBR-3/Tr cells and found that the expression of GAS5 is decreased in breast cancer patients and SKBR-3/Tr cells after trastuzumab treatment, demonstrating that trastuzumab can reduce the expression of GAS5. The gene discussed is GAS5; the disease is breast carcinoma.