Maternal gut microbiome–induced IgG regulates neonatal gut microbiome and immunity

Breast milk IgG adds valueAlthough the most abundant class of antibody present in breast milk is IgA, maternal IgG antibodies also get transferred into breast milk via the neonatal Fc receptor. Sanidad et al. used mouse models to investigate the capacity of breast milk IgG to protect against pathogens and promote the establishment of a …

Continue reading Maternal gut microbiome–induced IgG regulates neonatal gut microbiome and immunity

Gut bacterial isoamylamine promotes age-related cognitive dysfunction by promoting microglial cell death

The intestinal microbiome releases a plethora of small molecules. Here, we show that the Ruminococcaceae metabolite isoamylamine (IAA) is enriched in aged mice and elderly people, whereas Ruminococcaceae phages, belonging to the Myoviridae family, are reduced. Young mice orally administered IAA show cognitive decline, whereas Myoviridae phage administration reduces IAA levels. Mechanistically, IAA promotes apoptosis …

Continue reading Gut bacterial isoamylamine promotes age-related cognitive dysfunction by promoting microglial cell death

Longitudinal multi-omics analyses link gut microbiome dysbiosis with recurrent urinary tract infections in women

Recurrent urinary tract infections (rUTIs) are a major health burden worldwide, with history of infection being a significant risk factor. While the gut is a known reservoir for uropathogenic bacteria, the role of the microbiota in rUTI remains unclear. We conducted a year-long study of women with (n = 15) and without (n = 16) history of rUTI, from …

Continue reading Longitudinal multi-omics analyses link gut microbiome dysbiosis with recurrent urinary tract infections in women

Global, distinctive, and personal changes in molecular and microbial profiles by specific fibers in humans

Dietary fibers act through the microbiome to improve cardiovascular health and prevent metabolic disorders and cancer. To understand the health benefits of dietary fiber supplementation, we investigated two popular purified fibers, arabinoxylan (AX) and long-chain inulin (LCI), and a mixture of five fibers. We present multiomic signatures of metabolomics, lipidomics, proteomics, metagenomics, a cytokine panel, …

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Microbiomes of Urine and the Prostate Are Linked to Human Prostate Cancer Risk Groups

Bacteria play a suspected role in the development of several cancer types, and associations between the presence of particular bacteria and prostate cancer have been reported. ObjectiveTo provide improved characterisation of the prostate and urine microbiome and to investigate the prognostic potential of the bacteria present. Design, setting, and participantsMicrobiome profiles were interrogated in sample …

Continue reading Microbiomes of Urine and the Prostate Are Linked to Human Prostate Cancer Risk Groups