In 2014, specific CRISPR/Cas9-gRNA complexes targeting the HPV-16 E7 gene were first reported in HPV positive SiHa and Caski cells, of which the inhibition of E7 expression resulted in the up-regulation of tumor suppressor protein pRb, eventually inducing tumor cell apoptosis and inhibiting tumor cell growth [58]. This evidence concerns the gene TCHP and neoplasm.