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Cancer is a group of heterogeneous diseases that accounts for 1 in 6 deaths globally. Current research efforts focus on screening, early detection and discovering improved treatment options with the aim of decreasing patient mortality. This editorial selection highlights some of our recent most exciting papers that significantly move forward the rapid evolving field of cancer research.
The molecular mechanisms underlying metastasis in pheochromocytoma/paraganglioma (mPPGL) remain to be explored. Here, the authors perform genomic and immunogenomic profiling of mPPGL tumors and suggest potential biomarkers for risk of metastasis and immunotherapy response.
The origin of cancer-associated fibroblasts (CAFs) in cancer remains to be identified. Here, single-cell transcriptomics, in vivo and in vitro studies suggest that CD26+ and CD26- normal fibroblasts transform into distinct CAF subpopulations in mouse models of breast cancer.
Richter syndrome (RS) is the transformation of chronic lymphocytic leukaemia (CLL) into aggressive lymphoma, in most cases diffuse large B-cell lymphoma (DLBCL). Here, the authors characterize the DNA methylation and transcriptomic profiles of RS samples, find a clonally-related CLL epigenetic imprint, and develop classifiers for “RS-type” de novo DLBCLs.
Primary and metastatic tumours have different metabolic phenotypes due to changes in nutrient availability. Here the authors perform multi-omic analyses of primary and metastatic renal cancer cells grown in a physiological medium and show that the reprogramming of the branched-chain amino acid catabolism and urea cycle through re-expression of ASS1 allows metabolic flexibility during renal cancer progression.
LATS1 is reported to regulate the transition of luminal-basal-like cell plasticity in breast cancer. Here the authors report that LATS1 limits the progression of luminal breast cancer by associating with NCOR1 nuclear corepressor to repress ERα-downregulated genes in luminal cells.
LATS1/2 kinases are reported to be tumour suppressors in many cancers. Here the authors show that conditional deletion of LATS1/2 in the mature mouse luminal mammary epithelium leads to luminal-basal plasticity and development of basal-like carcinomas.
T cell exhaustion in breast tumours remains to be fully characterised. Here, single cell transcriptomics and imaging mass cytometry analysis of luminal breast tumours with or without exhausted T cells suggests distinct patterns of PD-1 and CXCL13 expression in T cells, and of MHC-I, but not PD-L1, expression in tumour cells.
Cancer-associated fibroblasts (CAFs) are the main component of the stroma in pancreatic cancer, but their tissue of origin remains to be defined. Here the authors perform lineage tracing and single cell RNA sequencing in mice and suggest the splanchnic mesenchyme as the tissue of origin for CAFs.
The identification of distinct cell populations with cellular plasticity in skin basal cell carcinoma is important for understanding treatment resistance mechanisms. Here, the authors identify the resistant LY6D+ basosquamous population that correlates with poor clinical outcomes.
The biological underpinnings underlying the increased mortality and morbidity in adolescents and young adults (AYA) remains poorly understood. Here, the authors investigate the clinical and genomic disparities in AYA and older adults in a cohort of more than 100,000 cancer patients.
The Bladder Cancer Advocacy Network established the UC-GENOME study in order to create a biobank and data repository for metastatic urothelial carcinoma. Here, the authors present the first characterization and analysis of DNA and RNA sequencing data from the 218 patients included in the UC-GENOME.
It remains critical to identify colorectal cancers (CRC) that will disseminate as early as possible. Here, the authors identify CRC tumours that are aggressive and prone to early dissemination, characterised by epithelial TGFβ and growth-factor signalling - which could be targeted with MEK/EGFR inhibitors.
Nucleosome profiling from cell-free DNA (cfDNA) represents a potential approach for cancer detection and classification. Here, the authors develop Griffin, a computational framework for tumour subtype classification based on cfDNA nucleosome profiling that can work with ultra-low pass sequencing data.
Multiregion sequencing is needed to better capture the heterogeneity of hepatocellular carcinoma (HCC) and intrahepatic cholangiocarcinoma (iCCA). Here, the authors analyse HCC and iCCA tumours with multiregion single-cell RNA-seq, revealing cellular dynamics and communication networks with immune cells.
The ETV6-RUNX1 chimeric- and native RUNX1-responsive regulomes in paediatric B-acute lymphoblastic leukemia (B-ALL) remain to be characterized. Here, the authors reveal functional antagonism between the two transcription factors predominantly for the regulation of cell cycle-associated pathways and dependency on native RUNX1 for tumorigenesis which can be targeted pharmacologically.
Happloinsufficiency of Myc delays onset of cancers in mice. Here, the authors generated a mouse model of reversible cMyc hypomorphism and show that metronomic reduction of c-Myc in adult mice confers protection against cancers without side effects and that the bottleneck in early cancer evolution is dependent upon Myc.
The role of enhancer de-regulation in anti-tumor immunity remains to be explored. Here, the authors suggest that ablation of MLL3 and MLL4, two enhancer-associated H3K4 monomethyltransferases, increases tumor immunogenicity and promotes anti-tumor T cell response.
The links between DNA methylation and gene expression are poorly understood on large-scale. Here the authors show that MIR retrotransposons within introns can play this role in acute myeloid leukemia harbouring mutations in epigenetic modifiers.
The biological understanding of poor prognosis associated with lymph node metastasis in head and neck cancer (HNC) remains crucial. Here, a proteomic characterisation of 140 multisite samples from a 59-HNC patient cohort and machine learning reveals potential biomarkers and metastasis related signatures.
The changes in super-enhancer (SE) landscape of cancers are mainly attributed to cell-intrinsic genomic alterations. Here, the authors perform epigenomic profiling on primary colorectal cancers (CRCs) and their matched normal tissues and show that local tumour microenvironment induces a SE activation and that its target, PDZK1IP1 promotes CRC growth.
Cell migration regulates diverse (patho)physiological processes, including cancer metastasis. Here the authors show that the chloride ion channel SWELL1 and the ion exchanger NHE1 are preferentially enriched at the trailing and leading edges, respectively, of migrating cells and regulate cell volume to propel confined cells, favouring breast cancer cell extravasation and metastasis.
The molecular and cellular underpinnings of cribriform prostate cancer aggressiveness remain to be explored. Here, the authors perform single-cell RNA-sequencing, TCR sequencing and histology and reveal cancer cell intrinsic pathways and an immunosuppressive tumour microenvironment.
Pheochromocytomas and paragangliomas (PCPG) are rare neuroendocrine tumours. Here, the authors use single-nuclei and bulk-tissue RNA-seq to characterise PCPG tumours and their microenvironments and reveal molecular subtypes as well as expression patterns associated with metastasis.
Activation of ESCRT-mediated cell membrane repair can reduce the extent of tumor cell pyroptosis. Here the authors develop two formulations (an injectable hydrogel and a cell patch) for the sustained release of a Gasdermin-D bacteria-based delivery system and of biodegradable nanoparticles loaded with an ESCRT inhibitor, triggering pyroptosis and antitumor immune responses in preclinical cancer models.
Therapeutic stress induces phenotypic plasticity in glioma stem cells although the mechanisms underlying this remain poorly understood. Here, the authors show that P300 mediates the radiation-induced vascular-like conversion of glioma stem cells to promote tumor recurrence.
Acute myeloid leukaemia (AML) is maintained by self-renewing leukemic stem cells. Here the authors show that Heat Shock Transcription Factor 1 (HSF1) is specifically required for the maintenance of AML stem cells, while sparing steady-state and stressed haematopoiesis and that pharmacologically targeting HSF1 may have broad anti-leukemic effects.
Specific anti-cancer therapies are highly mutagenic to cancer cells but the mutational impact on healthy tissues remains elusive. Here, the authors use organoids and whole-genome sequencing to characterise somatic mutations in healthy colon and liver adult stem cells after chemo- or radiotherapy.
Based on the S-TRAC results, sunitinib is approved as adjuvant treatment for adult patients at high risk of recurrent RCC following nephrectomy. Here, the authors report the results of an integrated multi-omics tumor analysis of 171 patients from the trial and identify specific molecular subtypes as well as potential new targets.
Sirtuin 5 (SIRT5) has been associated to colorectal cancer and metabolic regulation. Here, the authors show that SIRT5 silencing reduces nucleotide availability leading to DNA damage and tumor suppression in colorectal cancer models.
The distribution and organisation of matrix molecules in the tumour stroma help shape solid tumour progression. Here they perform temporal proteomic profiling of the matrisome during breast cancer progression and show that collagen XII secreted from CAFs provides a pro-invasive microenvironment.
Multiple alternative splicing events in CD19 mRNA have been associated with resistance/relapse to CD19 CAR-T therapy in patients with B cell malignancies. Here, by combining patient data and a high-throughput mutagenesis screen, the authors identify single point mutations and RNA-binding proteins that can control CD19 splicing and be associated with CD19 CAR-T therapy resistance.
Fasting has been reported to protect from chemotherapy-associated toxicity. Here, the authors show that fatty acid profiles in erythrocyte membranes and gene expression from peripheral blood mononuclear cells are associated to the fasting-mediated benefits during cancer treatment in mice and patients.
Different molecular subtypes defined by specific gene rearrangements have been described for acute lymphoblastic leukaemia (ALL). Here, the authors show that ZNF384 fusion activates FLT3 expression conferring a therapeutic vulnerability for ZNF384- rearranged ALL subtype.
RAS mutations are commonly found in multiple myeloma (MM). Here, the authors show that oncogenic RAS mutations activate mTORC1 signalling in MM and combining mTORC1 and MEK/ERK inhibitors synergize to improve survival in preclinical models.
TERT promoter mutations are the most common noncoding alterations in cancers, although some remain to be characterised. Here, the authors identify TERT promoter duplications across seven cancer types that are functionally equivalent to well-known hotspot TERT mutations and are clonal in a multifocal glioblastoma patient.
Spatial heterogeneity in prostate cancer can contribute to its resistance to androgen deprivation therapy (ADT). Here, the authors analyse prostate cancer samples before and after ADT using Spatial Transcriptomics, and find heterogeneous pre-treatment tumour cell populations and stromal cells that are associated with resistance.
The molecular characterisation of germ cell tumours (GCT) is necessary to understand their development and histological diversification. Here, the authors use whole-genome and transcriptome sequencing of GCTs across distinct histologies to reveal their somatic evolution and clonal diversification, as well as identify several putative biomarkers for treatment stratification.
The impact of germline variants on somatic alterations in cancer remains to be explored in large-scale datasets. Here, the authors study the association of rare germline variants with somatic mutational processes in more than 15,000 tumors, and reveal that damaging variants in newly-identifed genes are prevalent in the population.
Super-enhancers and their associated transcription factor networks have been shown to influence ovarian cancer biology. Here, based on an integrated set of genomic and epigenomic datasets, the authors identify clinically relevant super-enhancers amplified in ovarian cancer patients and functionally validate their activity.
Response rates to immune checkpoint inhibitors (ICI) in patients with head and neck squamous cell carcinoma (HNSCC) remain low. Here the authors show that ablative treatment of tumor-draining regional lymphatics, a standard of care approach in patients, impairs the tumor response to ICI in preclinical HNSCC models.
Classification and risk-stratification for Acute Myeloid Leukemia (AML) at diagnosis are primarily based on cytogenetics and only a few gene mutations. Here, the authors study the genomic landscape of 3653 AML patients and characterize 16 non-overlapping molecular subgroups of clinical relevance for disease classification and risk prognostication.
Mutant KRAS (KM) is associated with poor prognosis in lung cancer and reported to promote lipid metabolism. Here, the authors show that fatty acid synthesis, which provides lipids to repair oxidized phospholipids through the FASN-Lands cycle axis, is a specific vulnerability for KM lung cancer.
Identifying the genetic drivers of clonal haematopoiesis (CH) has been challenging due to their low frequencies and a lack of adequate tools. Here, the authors use a reverse calling to detect blood somatic mutations and the IntOGen pipeline to identify CH drivers in large cancer genomics data sets based on signals of positive selection.
Gene fitness and essentiality analyses using in vivo cancer models are challenging due to multiple confounders. Here, the authors develop a quantitative approach to study CRISPR-transduced patient-derived xenografts, which they use to analyse in vivo gene fitness in breast cancers and the biological features that influence uncertainty in fitness estimation.
Inherited mutations in MUTYH have been shown to predispose patients to colorectal cancers. Here, the authors show that MUTYH mutations lead to an increased somatic base substitution mutation rate in normal intestinal epithelial cells, which is the likely cause for the increased cancer risk.
The heterogeneity underlying cancer organoid phenotypes is not yet well understood. Here, the authors develop an imaging analysis assay for high throughput phenotypic screening of colorectal organoids that allows to define specific morphological changes that occur following different drug treatments.
Germline biallelic pathogenic MUTYH variants predispose patients to colorectal cancer (CRC); however, approaches to identify MUTYH variant carriers are lacking. Here, the authors evaluated mutational signatures that could distinguish MUTYH carriers in large CRC cohorts, and found MUTYH-associated somatic mutations.
Multiple methods to infer cell-cell communication (CCC) from single cell data are currently available. Here, the authors systematically compare 16 CCC inference resources and 7 methods, and develop the LIANA framework as an interface to use and compare all these approaches.