Researchers identify new approach to overcome resistance to KRAS-targeted therapies

Many cancers with KRAS mutations, the most commonly mutated oncogene, develop rapid resistance to targeted therapy with KRAS inhibitors. A recent study by Wantong Yao, M.D., Ph.D., Scott Kopetz, M.D., Ph.D., and Haoqiang Ying, M.D. Ph.D., and colleagues discovered that SDC1, a cell surface protein involved downstream of the KRAS-mutated pathway and associated with pancreatic cancer progression, plays a critical role in acquired resistance to KRAS inhibitors. In preclinical models of KRAS-mutant pancreatic and colorectal cancers, SDC1 expression on the cell surface initially...

Study provides insights into advanced ovarian cancer tumors after treatment

Many patients with advanced ovarian cancer treated with frontline therapies still end up with clinically undetectable amounts of cancer cells afterward, called minimal residual disease (MRD), leading to high likelihood of recurrence. However, there are no reliable tests to detect MRD, and its biological features remain understudied. Residual cancer cells escape the effects of surgery and chemotherapy and are the reason why cure rates for advanced ovarian cancer have remained low for many decades. To provide insights, researchers led by Amir Jazaeri,...

MDS subtype associated with poor outcomes after venetoclax-based therapy

Myelodysplastic syndromes (MDS) are a group of diseases in which the bone marrow does not produce enough healthy blood cells. The erythroid predominance (EP) subtype, marked by 50% or more erythroid cells (red blood cell precursors) in the bone marrow, has distinct biology, prognoses and drug sensitivities. To study this, researchers led by Guillermo Montalban Bravo, M.D., evaluated an MDS cohort of 371 patients, 18% of whom had EP MDS. They discovered EP MDS has unique genetic patterns...

New biomarker and strategy identify and overcome resistance in HR+/HER2- breast cancer

CDK4/6 inhibitors are targeted therapies commonly used as first-line treatments for patients with hormone receptor-positive HER2-negative (HR+/HER2-) metastatic breast cancer. However, some patients stop responding to CDK4/6 inhibitors, and the mechanisms behind this acquired resistance are poorly understood. In a new study led by Khandan Keyomarsi, Ph.D., researchers discovered that the inflammatory protein IL-6 becomes elevated in these patients, which then triggers another protein – STAT3 – that helps tumors progress. This highlights the potential of monitoring...

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