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A combination of high-resolution spatial imaging, spatial proteomics and transcriptional data reveals sparse and heterogeneous bacterial signals in gliomas and brain metastases.

The combination of neoadjuvant nivolumab, ipilimumab and chemotherapy showed promising efficacy in patients with resectable non-small cell lung cancer, with higher tumor immune cell infiltration and tertiary lymphoid structures after treatment compared with neoadjuvant nivolumab plus chemotherapy.

Neoadjuvant treatment with nivolumab plus ipilimumab is well tolerated and demonstrates clinical efficacy in patients with early stage lung cancer.

Analysis of nucleic-acid sequences from human cancers, along with samples from adjacent tissue and blood, reveals the presence of microorganisms in tumours and blood across cancers.

Perineural invasion and cancer-induced nerve injury of tumour-associated nerves are associated with poor response to anti-PD-1 therapy, which can be reversed by combining anti-PD-1 therapy with anti-inflammatory interventions.

Checkpoint inhibitor (CPI) therapy is modestly effective in Glioblastoma patients, with some patients not benefitting at all. Authors here present the outcomes of single arm prospective clinical trial employing combination CPI therapy in newly diagnosed GBM and identify the pre-treatment genetic, microbiome and immunological factors that might contribute to sensitivity.

Viral taxonomic characterization from metagenomic data suffers from high background noise and signal crosstalk. Here, the authors develop VirMAP, a novel pipeline for analyses of metagenomic data that classifies viral reconstructions independent of genome coverage or read overlap.

Granulomatous/sarcoid-like lesions have been reported in patients treated with immune checkpoint inhibitors (ICIs). Here the authors report the occurrence of “nodal immune flare”, an apparent radiological cancer progression in the nodes characterized by the absence of cancer and the presence of non-caseating granulomas, in patients with non-small cell lung cancer following neoadjuvant ICI treatment.

Although type-1 diabetes has a clear genetic component, not all children who are at risk eventually develop autoimmunity, suggesting the existence of environmental triggers. In this longitudinal transcriptomic study, the authors find that children who later develop autoimmunity have a distinct profile before the appearance of autoantibodies and may have impaired responses to enterovirus infection.

Here, via metagenomics and ITS2 sequencing analysis of children's stool samples from three months to four years, the authors show that the fungal composition changes and relative abundance increases at weaning, but unlike bacteria, the overall levels of fungal diversity do not change substantially over time.

Roland et al. report the results of a randomized, non-comparative phase 2 trial of neoadjuvant nivolumab or a combination of nivolumab and ipilimumab in patients with resectable retroperitoneal dedifferentiated liposarcoma and extremity/truncal undifferentiated pleomorphic sarcoma.

Metagenomic sequencing analysis of stool samples from 903 children as part of the TEDDY study shows that breastfeeding was the most important factor associated with microbiome structure, and the cessation of breast milk resulted in faster maturation of the gut microbiome.

Dietary fibers and SCFAs can exert a protective effect against respiratory syncytial virus (RSV). Here, the authors report that microbiota-derived acetate protects mice against RSV infection via GPR43- mediated type 1 interferon response induction in the lungs.

Clinical benefit or intestinal toxicity resulting from combined immune checkpoint blockade in patients with melanoma associates with prevalent commensal bacteria and can be decoupled by IL-1R inhibition.

A prospective analysis of gut microbiome signatures in patients treated with neoadjuvant immunocheckpoint blockade for high risk resectable metastatic melanoma identifies new links between microbiota signatures, dietary intake and systemic inflammation in shaping the response and toxicity to immunotherapy.

Composition of the gut microbiota is regulated by IgA antibodies which are produced under the control of MHCII-restricted B cells. Here the authors show that MHCII polymorphisms sculpt bacterial composition of the gut, which influences a host’s susceptibility to enteric Salmonellainfection.

Strategies to monitor and modulate gut microorganisms to improve immunity and responses to cancer immunotherapy are increasingly available, with opportunities to expand and iterate on these approaches to treat, intercept and prevent cancer (and other diseases) altogether.

The Inflammatory Bowel Disease Multi’omics Database includes longitudinal data encompassing a multitude of analyses of stool, blood and biopsies of more than 100 individuals, and provides a comprehensive description of host and microbial activities in inflammatory bowel diseases.

Commensal microbes are necessary for proper development of the immune system. Here Zanvit et al. show that neonatal antibiotics treatment causes long-term changes in the gut and skin microbiomes, and exacerbates immune-mediated skin pathology at adult age in mouse experimental models of psoriasis.

Neonatal rotavirus infections are associated with gastrointestinal symptoms in some settings, but the role of host factors in clinical presentation is unclear. Here, Ramani et al. show that human milk oligosaccharides and microbiome are associated with symptomatic infection with neonatal strain G10P[11].

An analysis of more than 10,000 metagenomes from the TEDDY study provides a detailed functional profile of the gut microbiome in relation to islet autoimmunity, and supports the protective effects of short-chain fatty acids in early-onset type 1 diabetes.

Analysis of known viruses in stool samples from young children with high genetic risk for type 1 diabetes shows that sustained enterovirus B (EV-B) infections, rather than independent, short-duration EV-B infections, might be involved in the development of islet autoimmunity, but not type 1 diabetes.

Travis Sims and Molly El Alam et al. show that diversity of gut microbiota is associated with a favorable response to chemoradiation for cervical cancer and use flow cytometry to show that patients with high microbiome diversity had increased tumor infiltration of CD4+ lymphocytes as well as activated subsets of CD4 cells expressing ki67+ and CD69+ throughout radiation therapy. These results reveal how modulation of the gut microbiota could potentially be used to improve treatment efficacy and outcome.

In a study of children with high genetic risk aged 2 years or older, a risk score integrating pancreatic islet autoantibodies, genetic factors and family history is highly predictive of type 1 diabetes in the subsequent 8 years.