KRAS mutation

PDC treatment significantly suppresses tumor growth in in vivo KRAS mutant xenograft model, demonstrating superior efficacy compared with cetuximab-based regimens and controls, without observable body weight loss. This strategy uses EGFR as a delivery portal instead of a signaling target, enabling KRAS independent anti-tumor activity. These findings indicate a non-canonical EGFR mediated delivery approach with potential translational relevance for the treatment of therapy resistant CRC.

In this issue of Cancer Cell, Entrialgo-Cadierno et al. raise the bar for the ∼20%-25% of patients with oncogenic KRAS mutations by unlocking the therapeutic potential of direct RAS-GTP inhibition.

Polymorphism co-occurrence patterns indicate a relatively low mutational burden, with epigenetic dysregulation and oncogenic signaling representing central mechanisms in iCCA development. Further large-scale studies integrating tissue and circulating DNA analyses are warranted to validate these findings and identify clinically actionable biomarkers in iCCA.

Methylation signature may be combined with genomic analysis to personalize therapeutic strategies for KRAS p. G12C mutated NSCLC patients. "Multiomic" analysis of tumor-informative molecular targets (genomic profile, methylation status) lay the basis for dynamic fingerprints of NSCLC patients preventing early relapses and augmenting clinical benefits of targeted therapies.

Analysis of CRC patient data revealed that the metastatic gene signature associated with the MAPK-high-WNT-low state correlated with poorer survival outcomes. These findings underscore the plasticity of metastasis-initiating cells in CRC driven by the opposing roles of MAPK and WNT signaling, despite their synergy observed during colon tumorigenesis.

The study further examines how oncogenic mutations in genes like EGFR, KRAS, TP53, KEAP1, and IDH1 reshape ferroptosis susceptibility or resistance through alterations in metabolic pathways, redox homeostasis, and tumor microenvironment interactions. By highlighting mutation-specific sensitivities, this work underscores the potential of ferroptosis-targeted strategies to surmount therapeutic resistance, synergize with conventional treatments like chemotherapy and immunotherapy, and drive precision oncology forward, paving the way for enhanced clinical outcomes across a broad spectrum of cancers.

The mutation rates of the NOTCH1 gene [23.1% (3/13) vs 3.7% (6/162), P=0.021], the SOCS1 gene [15.4% (2/13) vs 0, P=0.005], and the KRAS gene [15.4% (2/13) vs 0, P=0.005] were all higher in the transformed group than those in the non-transformed group. Patients with MALT lymphoma who transformed to DLBCL are often accompanied by B symptoms, a higher MALT-IPI score, elevated LDH and multiple gene mutations, and the mutation frequencies of NOTCH1, SOCS1, and KRAS are higher.

Inhibiting PI3K enhanced sensitivity to mutant-specific KRAS inhibitors in PDAC cells, including in cells with clinically identified PIK3CA mutations. These findings refine RAS-PI3K signaling paradigms, reveal that PI3K-driven wild-type RAS activation drives resistance to KRAS inhibition, and illuminate avenues for augmenting KRAS-targeted therapies in PDAC.

The patient subsequently received adjuvant treatment with immunotherapy (penpulimab) combined with chemotherapy, followed by penpulimab maintenance therapy, resulting in a progression-free survival of >44 months...Third, it explores the clinical implications of the KRAS mutation in this unique tumor subtype. The overarching goal of this exploration is to offer valuable clinical guidance for managing this rare and understudied subtype of lung cancer, particularly in the context of multimodal therapy involving immunotherapy.

Pharmacologic inhibition of KRAS G12C reverse the mechano-phenotype, while introducing KRAS G12C into healthy cells recapitulated it. Our findings identify a novel KRAS oncogene-mechanics axis, suggesting that targeting the cell's mechanical state could be a powerful complement to emerging KRAS-directed therapies.

BBO-8520 exerted more potent and sustained inhibition of KRAS G12C and anti-tumor activity in vitro and in vivo compared with sotorasib, a KRAS G12C (OFF)-only inhibitor...Moreover, in some contexts, disruption of RAS-PI3Kα further increased the anti-tumor activity of BBO-8520 monotherapy. These results reveal mechanistic differences between KRAS (ON) and (OFF) inhibitors, highlight the importance of PI3Kα-AKT signaling in driving resistance to KRAS inhibition in lung cancer, and suggest combination strategies that suppress PI3Kα-AKT to improve the response to KRAS inhibitors.