CD11b, also known as integrin alpha M (ITGAM), is a cell surface receptor belonging to the integrin family and primarily expressed on immune cells such as macrophages, monocytes, neutrophils, and NK cells. It forms a heterodimer with CD18 to create the 尾2 integrin complex, which is crucial for mediating cell adhesion, migration, and immune responses. CD11b plays a significant role in leukocyte recruitment and activation during inflammation and immune responses by interacting with ligands like ICAM-1 and iC3b. Additionally, it is involved in phagocytosis and immune regulation in various diseases, including cancer and autoimmune conditions.
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