MIT News
May 8, 2025
Researchers from the labs of Tyler Jacks and KI alum William Freed-Pastor uncovered cryptic peptides presented on the surface of pancreas cancer cells for the first time. Cryptic peptides, found in healthy cells and other tumor types, derive from genome sequences not known to code for any protein. The discovery may lead to more effective immunotherapies for pancreatic cancer, which has one of the lowest survival rates and few effective treatments.
A study appearing in Science and funded in part by the Lustgarten Foundation identified 500 pancreatic cancer-specific cryptic peptides. After testing 30, the team found 12 peptides could stimulated immune responses in cell culture, and the resulting data was used to engineer T cells capable of stopping or significantly slowing tumor progression in different cancer models. Freed-Pastor and his team at the Dana-Farber Cancer Institute have begun developing a therapeutic pancreatic cancer vaccine that targets cryptic antigens.