Glypican-3 (GPC3) is Glypican ™ A member of the family. Glypicans are proteoglycans that attach to the cell surface through glycosylphosphatidylinositol anchoring. They regulate the signal transduction activity of various growth factors, including Wnts. This regulation is based on the ability of glypicans to stimulate or inhibit the interaction between these growth factors and their respective signaling receptors. Glypican-3 (GPC3) plays an important role in regulating cell growth, differentiation, and migration. Expressed in 75% of hepatocellular carcinoma (HCC), but not in healthy liver tissue or other organs. Targeting GPC3 may provide a new tool for treating HCC.