Issues
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Autophagy plays a critical role in pancreatic ductal adenocarcinoma (PDAC) in which it can support tumor growth as well as protect against RAS-targeted therapies. However, the role that substrates of autophagy play in supporting tumor growth and drug resistance remains undetermined. Two studies by Santana-Codina and colleagues (page 2180) and Ravichandran and colleagues (page 2198) uncovered the role of ferritinophagy, a selective form of autophagy involving ferritin, in PDAC. Santana-Codina and colleagues demonstrated that NCOA4 targets ferritin for lysosomal degradation, releasing iron for cellular use. This process is upregulated in PDAC to support tumor progression, with the targeting of NCOA4 leading to delayed tumor growth. Ravichandran and colleagues found that sensitivity of PDAC cells to MEK inhibitors is reduced by ferritinophagy in a c-MYC and MiT/TFE factor–dependent manner, suggesting that targeting the lysosome-dependent iron supply could sensitize cells to KRAS–MAPK inhibition. For more information, see the corresponding articles at the page numbers listed above. - PDF Icon PDF LinkTable of Contents
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In This Issue
In the Spotlight
In Focus
Review
Research Articles
AACR Project GENIE: 100,000 Cases and Beyond
The landmark analysis of 100,000 patients in the AACR GENIE cohort illustrates use of this data set to predict clinical trial matching, uncover mechanisms of drug resistance, characterize rare cancers, and inform future whole-genome studies of cancer types without drivers detected by gene panels.
Alpelisib Monotherapy for PI3K-Altered, Pretreated Advanced Breast Cancer: A Phase II Study
Alpelisib monotherapy was efficacious in patients with PIK3CA mutant hormone receptor–positive breast cancer, with baseline ESR1 mutations and on-treatment circulating tumor DNA dynamics defining patients more likely to benefit.
Drug-Induced Epigenomic Plasticity Reprograms Circadian Rhythm Regulation to Drive Prostate Cancer toward Androgen Independence
Integrative multiomic profiling of highrisk prostate cancer specimens in a neoadjuvant clinical trial identified an acquired dependency on the circadian regulator ARNTL upon hormonal intervention.
Common Trajectories of Highly Effective CD19-Specific CAR T Cells Identified by Endogenous T-cell Receptor Lineages
Single-cell analyses demonstrate diverse fate potentials within CAR T-cell products and identify an unexpected surface phenotype (TIGIT+, CD62Llo, CD27−) distinguishing cells that become functional effectors within patients.
PRC2-Inactivating Mutations in Cancer Enhance Cytotoxic Response to DNMT1-Targeted Therapy via Enhanced Viral Mimicry
PRC2 inactivation in malignant peripheral nerve sheath tumors and melanoma potentiates DNMT1 inhibitor–mediated derepression of retrotransposons, which leads to increased immune pathway signaling and cell death through the double-stranded RNA sensor PKR.
A Therapeutically Actionable Protumoral Axis of Cytokines Involving IL-8, TNFα, and IL-1β
Both IL-1β and TNFα were found to induce IL-8 transcription and secretion in multiple cancer types in a manner that can be drugged using clinically available neutralizing agents.
SMYD3 Impedes Small Cell Lung Cancer Sensitivity to Alkylation Damage through RNF113A Methylation–Phosphorylation Cross-talk
RNF113A methylation by SMYD3 improves alkylation damage response and impairs small cell lung cancer sensitivity to alkylation-based chemotherapy.
NCOA4-Mediated Ferritinophagy Is a Pancreatic Cancer Dependency via Maintenance of Iron Bioavailability for Iron–Sulfur Cluster Proteins
NCOA4-mediated selective autophagy of ferritin (“ferritinophagy”) is upregulated in pancreatic adenocarcinoma to support iron metabolism for tumor progression, thereby representing a new therapeutic target.
Coordinated Transcriptional and Catabolic Programs Support Iron-Dependent Adaptation to RAS–MAPK Pathway Inhibition in Pancreatic Cancer
Interplay between MiT/TFE and c-MYC transcription factors fine-tune autophagy and lysosome biogenesis to promote increased ferritin degradation and iron supply, which fuel increased mitochondrial respiration during adaptation to RAS–MAPK pathway inhibition.
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Structural Biology
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Genome-wide Association Studies
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Prostate Cancer
Drug Discovery
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