As an example of the therapeutic potential of AuNPs, Yeom et al. [152] injected AuNPs that were coated with an mRNA encoding Bcl-2-associated X (BAX) protein, a pro-apoptotic factor, into mice xenograft tumors and observed the subsequent release of mRNA and production BAX protein, resulting in the inhibition of tumor growth. This evidence concerns the gene BAX and neoplasm.