CD99 Activators

CD99, also known as MIC2 gene product, or E2 antigen, is a cell surface glycoprotein encoded by the CD99 gene located on the pseudoautosomal region of sex chromosomes. CD99 is expressed in a variety of tissues and cell types, including leukocytes, thymocytes, and Ewing sarcoma cells. Its expression is notably high during certain stages of T-cell and B-cell development, suggesting a role in the immune system.The CD99 protein plays a complex role in various cellular processes such as cell adhesion, migration, apoptosis (programmed cell death), and immune response regulation. It is involved in the transendothelial migration of leukocytes, a critical step in the immune response where white blood cells move from the bloodstream into tissues.

CD99 has gained attention in research due to its strong expression in certain cancers, particularly Ewing sarcoma, a type of bone and soft tissue cancer. It is used as a diagnostic marker in identifying this and other types of tumors. The presence of CD99 is not exclusive to cancer cells, but its high expression levels can assist in the diagnosis and differentiation of specific cancersIn cancer research, the role of CD99 is complex and somewhat paradoxical. While it appears to contribute to tumor aggressiveness and metastasis in certain cancers, in others, it may act as a suppressor of tumor growth. This dual nature makes CD99 an interesting target for cancer therapy research.