Systemic metabolic reprogramming induced by infection exerts profound, pathogen-specific effects on infection outcome. Here, we detail the host immune and metabolic response during sickness and recovery in a mouse model of malaria. We describe extensive alterations in metabolism during acute infection, and identify increases in host-derived metabolites that signal through the aryl hydrocarbon receptor (AHR), a transcription factor with immunomodulatory functions. We find that mice are more susceptible to malaria and develop high plasma heme and acute kidney injury. This phenotype is dependent on AHR in -expressing radioresistant cells. Our findings identify a role for AHR in limiting tissue damage during malaria. Furthermore, this work demonstrates the critical role of host metabolism in surviving infection.
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http://dx.doi.org/10.7554/eLife.60165 | DOI Listing |
Cell Host Microbe
January 2025
State Key Laboratory of Female Fertility Promotion, Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China; Institute of Advanced Clinical Medicine, Peking University, National Clinical Research Center for Obstetrics and Gynecology (Peking University Third Hospital), Beijing, China; Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China. Electronic address:
Polycystic ovary syndrome (PCOS) affects 6%-10% of women of reproductive age and is known to be associated with disruptions in the gut bacteria. However, the role of the gut mycobiota in PCOS pathology remains unclear. Using culture-dependent and internal transcribed spacer 2 (ITS2)-sequencing methods, we discovered an enrichment of the gut-colonizable fungus Aspergillus tubingensis in 226 individuals, with or without PCOS, from 3 different geographical areas within China.
View Article and Find Full Text PDFNat Microbiol
January 2025
Section of General Surgery, Department of Surgery, University of Chicago, Chicago, IL, USA.
Sepsis is a major cause of morbidity and mortality, but our understanding of the mechanisms underlying survival or susceptibility is limited. Here, as pathogens often subvert host defence mechanisms, we hypothesized that this might influence the outcome of sepsis. We used microbiota analysis, faecal microbiota transplantation, antibiotic treatment and caecal metabolite analysis to show that gut-microbiota-derived tryptophan metabolites including indoles increased host survival in a mouse model of Serratia marcescens sepsis.
View Article and Find Full Text PDFFunction (Oxf)
January 2025
Cardio-Renal Physiology and Medicine Section, Division of Nephrology.
Excess dietary salt and salt-sensitivity contribute to cardiovascular disease. Distinct T cell phenotypic responses to high salt and hypertension as well as influences from environmental cues are not well understood. The aryl hydrocarbon receptor (AhR) is activated by dietary ligands, promoting T cell and systemic homeostasis.
View Article and Find Full Text PDFJ Hazard Mater
January 2025
The First Affiliated Hospital, MOE Education Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou, China; Jiangsu Key Laboratory of Preventive and Translational Medicine for Major Chronic Non-Communicable Diseases, China. Electronic address:
An ever-increasing body of research has established a link between maternal PM2.5 exposure and congenital heart diseases in the offspring, but the underlying mechanisms remain elusive. We recently reported that activation of the aryl hydrocarbon receptor (AHR) by PM2.
View Article and Find Full Text PDFDermatol Ther (Heidelb)
January 2025
Dermavant Sciences, Inc., Morrisville, NC, USA.
Introduction: Tapinarof is a topical aryl hydrocarbon receptor (AhR) agonist in development for the treatment of atopic dermatitis (AD). In two phase 3 trials (ADORING 1 and 2), tapinarof cream 1% once daily (QD) demonstrated significant efficacy and was well tolerated in patients down to age 2 years with AD. Here, we evaluate patient-reported outcomes (PROs), including family impact, with tapinarof in ADORING 1 and 2.
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