RNA sequencing analysis of mouse tumors revealed that the combination of T1-44 and vactosertib significantly altered the expression of genes involved in cancer progression, such as cell migration, extracellular matrix, and apoptotic processes. These data demonstrate that the combination therapy of T1-44 with vactosertib is synergistic for pancreatic cancer, suggesting that this novel combination therapy has value in the treatment strategy of patients with pancreatic cancer.