Key Considerations for Targeting KRAS in Pancreatic Cancer: Potential Impact on the Treatment Paradigm

Abstract: Pancreatic ductal adenocarcinoma (PDAC) is among the most lethal solid malignancies, characterized by aggressive biology and a paucity of effective treatments. Activating mutations in KRAS occur in more than 90% of cases and are fundamental to tumor initiation, progression, therapeutic resistance, and immune exclusion, establishing KRAS as the dominant oncogenic driver in PDAC. Long considered undruggable, KRAS has recently become a viable therapeutic target with the development of allele-specific inhibitors as well as pan-RAS(ON) agents capable of broadly suppressing mutant RAS signaling. Preclinical models and early-phase clinical trials demonstrate meaningful antitumor activity, with emerging evidence of tumor microenvironment remodeling and delayed resistance. Combination strategies integrating KRAS -directed therapies with chemotherapy, vertical pathway inhibition, immunotherapy, and emerging approaches such as KRAS degradation and RNA-targeted approaches are being explored to improve the depth and durability of response. Together, these advances signal a paradigm shift toward molecularly guided treatment strategies in PDAC and offer a promising path forward in a disease with substantial unmet clinical need. Plain Language Summary: Pancreatic ductal adenocarcinoma is one of the most aggressive and deadly cancers, with limited treatment options and poor long-term survival. Most patients are diagnosed at an advanced stage, and even with modern chemotherapy, outcomes remain disappointing. There is an urgent need for new and more effective therapies. More than 90% of pancreatic cancers contain mutations in a gene called KRAS , which drives cancer growth and resistance to treatment. For many years, this was thought to be impossible to target with drugs. Recent scientific advances have changed this view, leading to the development of new treatments that directly inhibit KRAS or block its signaling pathways. Early clinical trials of targeted therapies have shown encouraging results, including tumor shrinkage and disease control in some patients. Newer drugs can target specific mutations or multiple variants at once. However, responses are often temporary, as cancers can develop resistance through alternative growth pathways. To improve the durability of responses, researchers are testing combination strategies that pair KRAS -targeted therapies with chemotherapy, other targeted drugs, or immunotherapy. In addition, innovative approaches such as KRAS protein degradation, RNA-based therapies, gene editing, and targeted vaccines are being explored. Together, these advances represent a shift toward precision medicine in pancreatic cancer and offer new hope in a disease with few effective treatment options. Keywords: KRAS , pancreatic cancer, chemotherapy, targeted therapy, next generation sequencing