Proto-oncogenes are genes that exist in normal cells of the body to control cell growth and are normal regulatory genes. Many of the products are regulators of cell growth, proliferation, development and differentiation, and are often non-oncogenic. However, when the expression or structure is altered, proto-oncogenes are developed into oncogenes, which can lead to cancer development. The oncogenes in the human body are a class of genes that have the potential to inhibit cancer cell production, and the proteins they encode are mainly involved in cell cycle regulation, normal apoptosis, differentiation, signal transduction, and so on. However, when the oncogene is inactivated, it may allow the oncogene to function fully, leading to the development of cancer.