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A genome-wide CRISPR screen finds CIP2A as a new synthetic lethal target for BRCA1- and BRCA2-deficient cells. Unlike PARP inhibition that increases replication-induced DNA double-strand breaks and radial chromosomes, depleting CIP2A or disrupting its interaction with TOPBP1 increases micronuclei and chromosomal missegregation, revealing a mitotic target for BRCA-mutated tumors.
Mutations arising from APOBEC3-induced cytidine deamination are often found in advanced human cancers, yet how APOBEC3 promotes tumor progression remains poorly understood. A new study finds that APOBEC3A drives chromosomal instability in a deaminase-domain-independent manner, thereby promoting STING-dependent cancer metastasis.
Cancer is associated with higher risk of severe COVID-19 outcomes. Two studies prospectively analyze the immunological and clinical characteristics of a large cohort of patients with cancer following SARS-CoV-2 infection or vaccination, providing important clinical insights to improve the management of such vulnerable patients.
Glioblastoma multiforme (GBM) is a lethal form of primary brain cancer. A new study now implicates beta-secretase 1 (BACE1) as a crucial regulator of pro-tumoral IL-6–STAT3 signaling in GBM-associated macrophages. An effective BACE1 inhibitor, clinically developed for Alzheimer’s disease, may offer new hope for GBM treatment.
The mechanisms regulating the progression of benign tumors to malignant carcinomas remain incompletely understood. A new study identifies the transcription factor NR2F2 as a specific regulator of this transition that plays critical roles in the maintenance of the malignant tumor state.
Acute myeloid leukemia (AML) is a heterogeneous disease with limited therapeutic options. A new study identifies leukocyte immunoglobulin-like receptor 3 (LILRB3) as a marker of monocytic AML, with the ability to modulate NF-κB signaling and to promote survival and immune evasion. Blockade of LILRB3 signaling could provide a novel therapeutic strategy in monocytic AML.
Shedding light on epigenetic mechanisms controlling anti-tumor immune responses, a new study shows that the tumor-intrinsic ring finger protein 2 (RNF2), the catalytic subunit of Polycomb repressor complex 1 (PRC1), acts as a negative regulator of a collaborative NK and CD4+ T cell anti-tumor immune response against breast cancer.
Clinical interpretation of cancer genomes for therapy selection and clinical hypothesis generation is an urgent and complex endeavor. A new study brings together a diverse set of data sources to automatically prioritize first- and second-order genomic alterations to provide a meaningful set of interpretations based on a patient’s molecular profile.
DNA methyltransferase inhibitors are widely used in preclinical and clinical studies, but poor pharmacokinetics and low efficacy in solid tumors limit their therapeutic use. A new study reports the development and characterization of a specific, non-covalent DNA methyltransferase inhibitor with more-durable DNA hypomethylation and lower toxicity than that of nucleoside analogs.
CAR T cell therapies have made great strides in the clinic; however, multiple hurdles limit the efficacy of this approach for solid tumors. A new study has developed an optimized, dual-targeting CAR T cell that overcomes several of these challenges by enhancing T cell persistence and reducing therapy escape due to antigen loss.
Pseudouridine is the most abundant RNA modification, but its biological role remains poorly understood. A study now finds dysregulated pseudouridine synthase PUS7 in glioblastoma and demonstrates that pharmacological inhibition of PUS7 leads to reduced tumorigenesis, which underpins the therapeutic potential of targeting epitranscriptomic regulators in cancer.
Combining radiation and immune checkpoint blockade is a promising treatment strategy, yet the mechanisms and optimal dosing strategies are not well known. A new study finds that a specific radiation dose can activate secretory club cells to promote the anti-tumor effects of radiotherapy combined with immunotherapy in NSCLC.
Drug resistance may pre-exist or arise during therapy, but how precisely cancer treatment itself influences these processes is a major gap in the understanding of therapy resistance in cancer. A study of acute lymphocytic leukemia now provides direct evidence of thiopurine-induced mutations in the gene encoding the tumor suppressor p53 that result in multi-drug-resistant relapse.
Immuno-oncology approaches have shown little efficacy against high-grade glioma, a devastating manifestation of brain cancer. A new study now finds a metabolic vulnerability in IDH1-mutant glioma that can be targeted to reprogram tumor-infiltrating macrophages and create a tumor microenvironment that is more responsive to immune-checkpoint therapy.
Institutional clinical data repositories provide a depth and consistency of data elements that is difficult to match even with data pooled from diverse sources. A study now demonstrates how real-world data and clinical encounters can be captured in an integrated ‘data story’ to enable continuous learning and hypothesis generation in oncology.
Prostate cancer is largely unresponsive to immunotherapy. A new study finds elevated expression of the chemokine IL-8, or its mouse homolog Cxcl15, in prostate cancer after castration, which leads to the recruitment of immunosuppressive myeloid cells. Blocking tumor infiltration with these cells could improve the response to immune-checkpoint inhibition and androgen-deprivation therapy.
FTO, an m6A RNA demethylase, is known mainly as an oncoprotein in various cancer types. FTO is now shown to act as a cancer suppressor in a subset of epithelial tumors through an interplay between epithelial-to-mesenchymal transition and Wnt signaling.
The DNA polymerase Polθ is synthetic lethal with homologous-recombination deficiency, but a lack of specific targeting compounds has limited its therapeutic potential. Two studies now describe first-in-class inhibitors of Polθ with in vivo efficacy and thus provide alternative therapeutic approaches to PARP inhibitors for cancers deficient in homologous recombination.
Mutations in genes encoding epigenetic modifiers are frequent in acute myelogenous leukemia (AML) and have been proposed to cause AML via activation of oncogenes and repression of tumor suppressors. Two studies now identify unexpected oncogenic mechanisms and therapeutic vulnerabilities in AML arising from mutations in genes encoding the epigenetic regulators DNMT3A and ASXL1.
Two recent studies demonstrate how autophagy, in both tumor cells and host tissues, regulates anti-tumor T cell responses. These works add to accumulating evidence that inhibitors of autophagy could be used in combination with immunotherapy in certain cancer types.