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CD44 expressed by fibroblastic reticular cells in secondary lymphoid organs regulates trafficking of dendritic cells, and thus has an essential role in the priming of T cells and the adaptive immune response.

PARP inhibitors, either alone or in combination with bevacizumab, have regulatory approval as maintenance therapy following response to first-line platinum-based chemotherapy. Here this group reports SOLACE2 trial investigating whether combining olaparib with low dose cyclophosphamide treatment improves progression-free survival, comparing to olaparib monotherapy alone, in platinum-sensitive recurrent ovarian cancer.

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).

Winter and colleagues demonstrate that metabolic adaptation to nutrient stress in the tumor microenvironment of pancreatic cancer leads to a dependency on IDH1, which is therapeutically actionable regardless of IDH1 mutation status.

Woermann and colleagues describe a deaminase-independent function for APOBEC3A in initiating chromosomal instability and STING-dependent metastasis in human and mouse pancreatic cancer.

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.

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.

Observations from the Lucy spacecraft of the small main-belt asteroid (152830) Dinkinesh reveals unexpected complexity, with a longitudinal trough and equatorial ridge, as well as the discovery of the first contact binary satellite.

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.

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.

Adoptive T-cell immunotherapy offers promise to patients who are resistant to standard anti-viral strategies. Here the authors describe clinical observations in patients with viral complications treated with adoptive immunotherapy over the last 15 years.

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.

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.

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 randomized trial in patients hospitalized with COVID-19 showed no benefit and potentially increased harm associated with the use of convalescent plasma, with subgroup analyses suggesting that the antibody profile in donor plasma is critical in determining clinical outcomes.

Chris Spencer, Eleanor Barnes and colleagues use human genotyping arrays and whole-genome viral sequencing to perform a systematic genome-to-genome study of 542 individuals chronically infected with hepatitis C virus (HCV). They show that both HLA alleles and genes encoding factors of the innate immune system drive viral genome polymorphism and that IFNL4 genotypes determine HCV viral load through a mechanism dependent on a specific polymorphism encoded in the HCV polyprotein.

This overview of the ENCODE project outlines the data accumulated so far, revealing that 80% of the human genome now has at least one biochemical function assigned to it; the newly identified functional elements should aid the interpretation of results of genome-wide association studies, as many correspond to sites of association with human disease.

Skin-resident IL-17-producing γδT cells have an important role in skin inflammation but their development and trafficking is not well established. Here, Cai et al. unveil differences in the developmental requirements and functional regulation of two subsets of dermal γδT cells.

A system employing liquid-handling robotics and an integrated mobile microscope enables the automated culture, sample collection and in situ microscopy imaging of up to ten fluidically coupled organ chips within a standard tissue-culture incubator.

Sofosbuvir is a common therapy in hepatitis C virus infection, which targets the NS5B polymerase. Here, Smith et al. analyze the association between whole genome HCV polymorphisms and sofosbuvir treatment failure and identify three common polymorphisms present in non-targeted NS2 and NS3 proteins associated with reduced treatment response.

In some HIV-1-infected individuals, viraemia remains undetectable after antiretroviral treatment, but which of these patients will experience viral rebound is difficult to predict. Here the authors show that T cell exhaustion markers before treatment are predictive of shorter time to viral rebound.

Mucosal Associated Invariant T cells have been implicated in response to bacterial pathogens. Here the authors show that in human viral infections, these cells are activated by IL-18 in cooperation with other pro-inflammatory cytokines, producing interferon gamma and granzyme B.

Hyer et al. generate a potent and specific small-molecule inhibitor of the E1 ubiquitin-activating enzyme UBE1 that has antitumor activity in mice against a wide variety of tumor types.

New fluorescent biosensors enable the first super-resolution imaging of enzyme activity in live cells via fluorescence fluctuation increase by contact (FLINC).

Previous work has identified several genes where mutations lead to breast cancer, but other genetic and environmental factors must still be accounted for. A large study of genetic association with breast cancer points to four novel genes and many more genetic markers that should be pursued for their link to cancer susceptibility.

Dubois and colleagues assemble a large cohort of human pediatric high-grade glioma samples, identifying patterns of simple and complex structural variants and characterizing their role in tumor development and evolution.

A symposium in June 2018 sponsored by the Center on Membrane Protein Production and Analysis, a unit of the New York Structural Biology Center, focused on the structures of proteins residing in biological membranes. Explicit emphasis was placed on currently developing technologies aimed at determining such structures and at understanding their dynamics, mechanisms and complex interactions.

Scientific research on consciousness is critical to multiple scientific, clinical, and ethical issues. The growth of the field could also be beneficial to several areas including neurology and mental health research. To achieve this goal, we need to set funding priorities carefully and address problems such as job creation and potential media misrepresentation.

As phase 1 of the Earth Microbiome Project, analysis of 16S ribosomal RNA sequences from more than 27,000 environmental samples delivers a global picture of the basic structure and drivers of microbial distribution.

Essential genes have been effectively studied using temperature-sensitive alleles in yeast. Li et al. construct a large collection of temperature-sensitive yeast mutants and show how it enables high-throughput analyses of the function of essential genes.