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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).

As the first commercial ventures are formed around induced pluripotent stem (iPS) cell research, who will have the freedom to operate commercially remains a big unknown. Sarah Webb reports.

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.

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.

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.

Openshaw and colleagues find myeloid inflammation and complement activation signatures in patients with long COVID who were previously hospitalized.

Post-international travel quarantine has been widely implemented to mitigate SARS-CoV-2 transmission, but the impacts of such policies are unclear. Here, the authors used linked genomic and contact tracing data to assess the impacts of a 14-day quarantine on return to England in summer 2020.

In this study, Aggarwal and colleagues perform prospective sequencing of SARS-CoV-2 isolates derived from asymptomatic student screening and symptomatic testing of students and staff at the University of Cambridge. They identify important factors that contributed to within university transmission and onward spread into the wider community.

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.

The Omicron variant evades vaccine-induced neutralization but also fails to form syncytia, shows reduced replication in human lung cells and preferentially uses a TMPRSS2-independent cell entry pathway, which may contribute to enhanced replication in cells of the upper airway. Altered fusion and cell entry characteristics are linked to distinct regions of the Omicron spike protein.

Oxygen levels vary throughout the body and immune cells must adapt to these changes, both during homeostasis and in disease. Here, the authors discuss the impact of physiological subatmospheric oxygen levels (physioxia) as well as disease-related hypoxia on immune cell responses. They consider the therapeutic relevance of understanding how oxygenation affects immune responses in various diseases, including tuberculosis, COVID-19 and cancer.

Kyle Gaulton, Mark McCarthy, Andrew Morris and colleagues report fine mapping and genomic annotation of 39 established type 2 diabetes susceptibility loci. They find that the set of potential causal variants is enriched for overlap with FOXA2 binding sites in human islet and liver cells, and they show that a likely causal variant near MTNR1B increases FOXA2-bound enhancer activity, providing a molecular mechanism to explain the effect of this locus on disease risk.

Two doses of the coronavirus disease 2019 vaccine ChAdOx1 nCoV-19 boost antibody responses and functions in phase 1/2 trial participants.

Mirchandani and colleagues show that tissue hypoxia alters the number and phenotype of circulating monocytes and their differentiation into lung macrophages, with important implications for the resolution of inflammation in the lung.

The phase 2b trial of Merck's recombinant adenovirus type 5-based HIV-1 vaccine was halted as the vaccine seemed to have increased HIV-1 acquisition in vaccine recipients who had preexisting immunity to the adenovirus vector. One theory to explain these results is that the preexisting antibody response to the vector may have been a surrogate for increased vector-specific CD4⁺ T cells, which would have been amplified after vaccination and may have served as increased target cells during subsequent HIV-1 exposure. Daniel Barouch and his colleagues and Michael Betts and his colleagues now challenge this view.

An analysis of human chromosome 15 — which is altered in Prader-Willi and Angelman syndromes — reveals that it resembles a hall of mirrors, as it contains a number of sequence duplications throughout its length. The evolutionary events that may have led to the high number of duplications was also reconstructed.

Structural, biochemical and cellular studies reveal JMJD7 to be a Jumonji-C oxygenase that catalyzes (3S)-lysyl hydroxylation of the translation factor family of GTPases, DRG1 and DRG2.

A single dose of the ChAdOx1 nCoV-19 vaccine elicits antibodies and cytokine-producing T cells that might help control or prevent SARS-CoV-2 infection.

Diatoms sheath themselves in a self-made casing of silica, which requires the function of silicic acid transporters. Here, the authors identify versions of these transporters that are experimentally tractable, and develop a fluorescence method to study silicic acid transport in vitro.

Gilean McVean and colleagues report the results of a large-scale clinical genome sequencing project spanning a broad spectrum of disorders. They identify factors influencing successful genetic diagnosis and highlight the challenges of interpreting findings for genetically heterogeneous disorders.

Bladder cancer is a complex genetic disease and a common cause of death due to malignancy. Here, the authors carry out whole-genome sequencing of 14 bladder cancers to characterize the genomic landscape of the disease and show that mutational burden is associated with tumour progression in these samples.

Genome-wide association meta-analyses among 1.4 million individuals identify 318 new risk loci for type 2 diabetes and provide insight into the contribution of these risk variants to diabetes-related vascular outcomes.

Ian Tomlinson and colleagues report the identification of germline variants in POLE and POLD1 that are susceptibility alleles for colorectal cancer. POLE and POLD1 encode DNA polymerases that function in DNA replication.

Deletion of BECLIN1 in mice leads to fatal intestinal disruption and compromised gut barrier integrity. This study establishes that BECLIN1 is essential for intestinal homeostasis and uncovers its role in endocytic trafficking in this process.