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An analysis of whole-genome sequencing data from patients with Barrett’s oesophagus or oesophageal ademocarcinoma shows that extrachromosomal DNA (ecDNA) is strongly associated with cancer progression, and that a wide range of oncogenes are amplified on ecDNAs.

Rebecca Fitzgerald and colleagues report whole-genome sequence analyses of 23 paired samples of Barrett's esophagus and esophageal adenocarcinoma. Their analyses of the clonal architecture of these lesions shows that copy number increases and heterogeneity persists during development of esophageal adenocarcinoma.

Barrett’s oesophagus is thought to be a precursor lesion for oesophageal cancer, and predicting the benign lesions that progress to cancer is clinically important. Here, the authors use FISH to study the clonal evolution of Barrett’s oesophagus and show that genetic diversity and somatic mutations are present early in the benign disease.

Barrett’s oesophagus is associated with an increased risk of oseophageal cancer, but its cell of origin is unclear. Here the authors show, using single-cell RNA sequencing of biopsies from six patients and two unaffected subjects, that cells in Barrett’s oesophagus show a transcriptional profile that is similar to that of cells in oesophageal submucosal glands.

Peter Donnelly and colleagues report a genome-wide association study for Barrett's esophagus, a common premalignant condition associated with stomach acid reflux and predisposing to esophageal adenocarcinoma. They identify two loci associated with susceptibility to Barrett's esophagus.

Thomas Vaughan and colleagues report a genome-wide association study of esophageal adenocarcinoma together with its precancerous lesion, Barrett's esophagus. They identified three loci associated with susceptibility to this cancer.

This study shows that contrail avoidance can recover 9% of the global temperature budget by 2050. For every year of delay, the recoverable warming will diminish by 0.6%. This makes inaction (not fuel penalties) the most significant climate risk associated with avoidance.

It is critical to understand what drives the progression of oesophageal adenocarcinoma (OAC) from a pre-cancerous state. Here, the authors use whole-genome sequencing to characterise the mutational processes and drivers of OAC progression from Barrett’s Oesophagus, as well as their prognostic associations.

Rebecca Fitzgerald and colleagues used genome sequence analyses to study the progression from premalignant Barrett's esophagus to esophageal adenocarcinoma (EAC) and found that the majority of recurrently mutated genes in EAC were also mutated in precursor lesions and that only mutations in TP53 and SMAD4 were stage specific.

One of three back-to-back papers to show that dosage of BACH2 can modulate T cell differentiation and function and how we might apply this to enhance CAR T cell therapies for cancer.

This Review describes how the latest advances in so-called –omics technologies have helped to provide novel insights into the development and biology of oesophageal adenocarcinoma and its precursor lesion Barrett oesophagus. The authors discuss how these molecular profiles could improve patient management in the future, including early diagnosis and monitoring of response to therapy.

Ganguli et al. show that CDKN2A loss in Barrett’s esophagus prevents esophageal adenocarcinoma initiation by counterselecting subsequent TP53 loss and report context-dependent effects of 9p21 gene co-deletions on disease progression.

The impact of breakage fusion bridge (BFB) cycles on tumour heterogeneity and clinical outcomes remains poorly understood. Here, the authors develop OM2BFB, an algorithm to detect and reconstruct BFB amplifications using optical genome maps and use it to study BFB events across 2557 primary tumours and cancer cell lines.

Studies of the genetic association between vitamin D and cancer risk have typically been underpowered. Here the authors analyse this using Mendelian Randomisation with more than 70 vitamin D variants obtained from the UK Biobank and large-scale data from various consortia, confirming null associations between vitamin D and most cancers.

Phylogenomic analysis of 7,923 angiosperm species using a standardized set of 353 nuclear genes produced an angiosperm tree of life dated with 200 fossil calibrations, providing key insights into evolutionary relationships and diversification.

A global network of researchers was formed to investigate the role of human genetics in SARS-CoV-2 infection and COVID-19 severity; this paper reports 13 genome-wide significant loci and potentially actionable mechanisms in response to infection.

Genomic analysis of 551 esophageal adenocarcinomas identifies new driver mutations and biomarkers associated with poor prognosis. More than 50% of esophageal adenocarcinomas contain sensitizing events for CDK4/CDK6 inhibitors, thus providing an evidence base for targeted therapeutics.

Esophageal adenocarcinoma is characterised by frequent amplifications in oncogenes. Here, the authors use short- and long-read sequencing approaches to analyze primary tumor samples and tumour-derived organoids and to investigate the mechanisms underlying complex amplifications.

A study examines the diversity of extrachromosomal DNA elements in cancer, and provides details on the frequency and origin of extrachromosomal DNA and its role in the development of different types of cancer.

Identifying driver genes in unstable, heterogenous tumour types can be challenging. Here, Mourikis, Benedetti, Foxall and colleagues present a machine learning algorithm to tackle this problem in esophageal adenocarcinoma.

Genetic and testing data from England show that the SARS-CoV-2 variant of concern B.1.1.7 has a transmission advantage over other lineages.

An analysis of 24,202 critical cases of COVID-19 identifies potentially druggable targets in inflammatory signalling (JAK1), monocyte–macrophage activation and endothelial permeability (PDE4A), immunometabolism (SLC2A5 and AK5), and host factors required for viral entry and replication (TMPRSS2 and RAB2A).

Genome sequence data from colorectal tumours show how adenomas progress to carcinomas on the fitness landscape.

The ankylosaurian dinosaur Spicomellus afer possessed a tail weapon and uniquely elaborate dermal armour.

A study reports whole-genome sequences for 490,640 participants from the UK Biobank and combines these data with phenotypic data to provide new insights into the relationship between human variation and sequence variation.

The authors combine fossil occurrence data, phylogenies and climatic niche modelling to explore the palaeobiogeography of early pterosaurs and their non-flying close relatives, the lagerpetids.

Managing power exhaust in fusion reactors is a key challenge, especially in compact designs for cost-effective commercial energy. This study shows how alternative divertor configurations improve exhaust control, enhance stability, absorb transients and enable independent plasma regulation.

Sera from vaccinated individuals and some monoclonal antibodies show a modest reduction in neutralizing activity against the B.1.1.7 variant of SARS-CoV-2; but the E484K substitution leads to a considerable loss of neutralizing activity.

Chronic infection with SARS-CoV-2 leads to the emergence of viral variants that show reduced susceptibility to neutralizing antibodies in an immunosuppressed individual treated with convalescent plasma.

A study of the evolution of the SARS-CoV-2 virus in England between September 2020 and June 2021 finds that interventions capable of containing previous variants were insufficient to stop the more transmissible Alpha and Delta variants.