Serum albumin maintains Wnt3a water solubility and activity.

Serum albumin maintains the activity and stability of AFM-solubilized Wnt3a in conditioned media, and also efficiently solubilizes purified Wnt3a on its own.

• Why it matters: Most Wnt preparations need fetal bovine serum or detergents to keep Wnt soluble and active, limiting experimental and therapeutic use.
• What they did: The study tested serum albumin’s effects in conditioned media and used test-tube assays to show SA alone solubilizes purified Wnt3a, then converted CHAPS-pWnt3a to SA-pWnt3a via dialysis-mediated detergent removal.
• The result: The SA-based strategy preserves Wnt3a activity and stability, enabling detergent-free preparation of active Wnt3a for experimental and therapeutic applications.