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Broad-Spectrum RAS Inhibition in Pancreatic Ductal Adenocarcinoma: Mechanistic Advances and Therapeutic Promise
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Broad-Spectrum RAS Inhibition in Pancreatic Ductal Adenocarcinoma: Mechanistic Advances and Therapeutic Promise
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Journal Article
Broad-Spectrum RAS Inhibition in Pancreatic Ductal Adenocarcinoma: Mechanistic Advances and Therapeutic Promise
2025
Overview
The RAS family of oncoproteins (KRAS, HRAS, and NRAS) drive aggressive cancers like pancreatic ductal adenocarcinoma (PDAC) and non-small cell lung cancer (NSCLC), yet targeting mutant RAS has historically been challenging due to its “undruggable” structure. Recent advances in mutation-specific inhibitors (e.g., sotorasib for KRASG12C) have demonstrated clinical efficacy but face limitations in tumor types like PDAC, where KRASG12C mutations are rare. Broad-spectrum pan-RAS inhibitors (e.g., RMC-7977, RMC-6236, ADT-007/ADT-1004) now offer promise by targeting active GTP-bound or nucleotide-free RAS across isoforms and mutations. Preclinical studies show these agents induce deep tumor regressions, overcome resistance to allele-specific inhibitors, and remodel the tumor microenvironment (TME) by enhancing T-cell infiltration and reducing immunosuppressive myeloid cells. Early clinical data for RMC-6236 report disease control rates of 85–87% in NSCLC and PDAC, with manageable toxicity. This review shows that pan-RAS inhibitors represent a promising new class of therapeutics capable of overcoming many historical challenges associated with the “undruggable” nature of RAS proteins and demonstrating encouraging preclinical and early clinical results, particularly in difficult-to-treat tumor types such as PDAC and NSCLC. Challenges remain in achieving a therapeutic index due to RAS’s role in normal tissue homeostasis, but tumor-specific drug accumulation and rapid normal tissue recovery may mitigate risks. Ongoing trials are evaluating combination strategies with immunotherapy and chemotherapy, positioning pan-RAS inhibitors as transformative agents for RAS-driven cancers.
Publisher
MDPI AG
Subject
