Journal articleAuthors : Leslie, Andrew (2023)
Osteopontin (OPN) is a secreted glycophosphoprotein that derives its name from its high abundance in
33 bone and secretion by osteoblasts. It is also secreted by a number of immune cells and, therefore, is
34 present in human plasma at nanogram per millilitre levels where it affects cell adhesion and motility.
35 These properties implicate OPN as a promotor of tumor progression. Plasma OPN is primarily measured
36 by enz... 
