Issues
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The use of targeted therapies in patients with pancreatic ductal adenocarcinoma (PDAC) has proven challenging. More than 90% of patients with PDAC have an oncogenic mutation in KRAS, which makes it an attractive target for this disease. Recent progress has been made in targeting KRAS across different tumor types through the development of KRASG12C mutation–specific inhibitors, but these small molecules have had limited benefit in PDAC, as the KRASG12D mutation is more common in this cancer type. In this study, Kemp and colleagues sought to evaluate the efficacy of MRTX1133, a small-molecule inhibitor of KRASG12D, in immune-competent models of PDAC. MRTX1133 exhibited specificity and potency in vitro while also inducing tumor regression in vivo with complete or near-complete regressions after 14 days. Critical cell types within the tumor microenvironment were also affected by MRTX1133 treatment, with T cells being shown as necessary for the full antitumor effect of MRTX1133. For more information, see the article by Kemp and colleagues on page 298. - PDF Icon PDF LinkTable of Contents
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In This Issue
In the Spotlight
Science in Society
Review
Research Briefs
Efficacy of a Small-Molecule Inhibitor of KrasG12D in Immunocompetent Models of Pancreatic Cancer
Pharmacologic inhibition of KrasG12D in therapy-refractory models of pancreatic ductal adenocarcinoma promotes deep tumor regressions with alterations in the tumor microenvironment.
Distinct Mechanisms of Mismatch-Repair Deficiency Delineate Two Modes of Response to Anti–PD-1 Immunotherapy in Endometrial Carcinoma
Microsatellite instability–high endometrial cancers can be classified by the underlying mechanism of mismatch-repair deficiency, revealing two distinct modes of response to PD-1 immunotherapy.
A Dynamic rRNA Ribomethylome Drives Stemness in Acute Myeloid Leukemia
Ribomethylome profiling of primary acute myeloid leukemia cells uncovered a specific and dynamic rRNA 2′-O-methylation pattern that influences protein translation and thus leukemia stem cell phenotypes and disease progression.
Research Articles
MinimuMM-seq: Genome Sequencing of Circulating Tumor Cells for Minimally Invasive Molecular Characterization of Multiple Myeloma Pathology
Genomic biomarker profiling of circulating tumor cells enabled by the MinimuMM-seq assay could be used clinically for early diagnosis, monitoring, and management of patients with multiple myeloma with a simple peripheral blood sample.
Human Bone Marrow Organoids for Disease Modeling, Discovery, and Validation of Therapeutic Targets in Hematologic Malignancies
Development of human bone marrow organoids that capture key cellular, molecular, and architectural features of hematopoietic tissue enables disease modeling and target screening using primary cells from patients with myeloid and lymphoid blood cancers.
OncoLoop: A Network-Based Precision Cancer Medicine Framework
OncoLoop is a novel, transcriptomic-based experimental and computational framework for rapid-turnaround coclinical studies to identify and validate drugs for individual patients and their adaptation to clinical practice.
Cellular Senescence Is Immunogenic and Promotes Antitumor Immunity
Therapy-induced senescence renders cancer cells highly immunogenic, making them very efficient in triggering protective CD8-dependent antitumor immune responses.
Senescence Rewires Microenvironment Sensing to Facilitate Antitumor Immunity
Tumor cells triggered to senesce alter how they send and receive microenvironmental signals, leading to tissue remodeling, immune cell recruitment, hypersensitization to environmental IFNγ, and improved antitumor immunity.
Targeting UGCG Overcomes Resistance to Lysosomal Autophagy Inhibition
Lysosomal autophagy inhibition (LAI) in cancer induces lipid remodeling that resists cell death associated with lysosomal membrane permeabilization, which can be abrogated by targeting UDP-glucose ceramide glucosyltransferase in the face of LAI.
Bone Metastasis Initiation Is Coupled with Bone Remodeling through Osteogenic Differentiation of NG2+ Cells
NG2+ mesenchymal stem cells provoke early-stage bone colonization by interacting with tumor cells via N-cadherin–based adhesion, which was strengthened by osteogenesis, thereby linking bone remodeling to metastasis.
Dysregulated Lipid Synthesis by Oncogenic IDH1 Mutation Is a Targetable Synthetic Lethal Vulnerability
Synthetic lethality and mass spectrometry were used to identify novel metabolic vulnerabilities in cancers with IDH1, but not IDH2, mutations that are targetable in the setting of ivosidenib resistance.
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