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Subchronic inhalation exposure to ultrafine particulate matter alters the intestinal microbiome in various mouse models.
Chang, Candace; Gupta, Rajat; Sedighian, Farzaneh; Louie, Allen; Gonzalez, David M; Le, Collin; Cho, Jae Min; Park, Seul-Ki; Castellanos, Jocelyn; Ting, To-Wei; Dong, Tien S; Arias-Jayo, Nerea; Lagishetty, Venu; Navab, Mohamad; Reddy, Srinivasa; Sioutas, Constantinos; Hsiai, Tzung; Jacobs, Jonathan P; Araujo, Jesus A.
Afiliação
  • Chang C; Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Department of Environmental Hea
  • Gupta R; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Department of Environmental Health Sciences, Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA, USA; Molecular Toxicology Interdepartmental Progr
  • Sedighian F; Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.
  • Louie A; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Department of Environmental Health Sciences, Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA, USA; Molecular Toxicology Interdepartmental Progr
  • Gonzalez DM; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Molecular Toxicology Interdepartmental Program, University of California Los Angeles, Los Angeles, CA, USA.
  • Le C; Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.
  • Cho JM; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.
  • Park SK; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.
  • Castellanos J; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Department of Environmental Health Sciences, Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA, USA.
  • Ting TW; Department of Environmental Health Sciences, Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA, USA.
  • Dong TS; Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Goodman-Luskin Microbiome Center, University of California Los Angeles, Los Angeles, CA, USA; Division of Gastroenterology, Hepatology and Parentera
  • Arias-Jayo N; Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Goodman-Luskin Microbiome Center, University of California Los Angeles, Los Angeles, CA, USA.
  • Lagishetty V; Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Goodman-Luskin Microbiome Center, University of California Los Angeles, Los Angeles, CA, USA.
  • Navab M; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.
  • Reddy S; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Molecular Toxicology Interdepartmental Program, University of California Los Angeles, Los Angeles, CA, USA; Molecular & Medical Pharmacology, University of California Los Angeles,
  • Sioutas C; University of Southern California (USC) Viterbi School of Engineering, Los Angeles, CA, USA.
  • Hsiai T; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Henry Samueli School of Engineering, University of California Los Angeles, Los Angeles, CA, USA.
  • Jacobs JP; Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Goodman-Luskin Microbiome Center, University of California Los Angeles, Los Angeles, CA, USA; Molecular Toxicology Interdepartmental Program, Univer
  • Araujo JA; Division of Cardiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Department of Environmental Health Sciences, Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA, USA; Molecular Toxicology Interdepartmental Progr
Environ Res ; 248: 118242, 2024 May 01.
Article em En | MEDLINE | ID: mdl-38242419
ABSTRACT
Exposure to ultrafine particles (UFPs) has been associated with multiple adverse health effects. Inhaled UFPs could reach the gastrointestinal tract and influence the composition of the gut microbiome. We have previously shown that oral ingestion of UFPs alters the gut microbiome and promotes intestinal inflammation in hyperlipidemic Ldlr-/- mice. Particulate matter (PM)2.5 inhalation studies have also demonstrated microbiome shifts in normolipidemic C57BL/6 mice. However, it is not known whether changes in microbiome precede or follow inflammatory effects in the intestinal mucosa. We hypothesized that inhaled UFPs modulate the gut microbiome prior to the development of intestinal inflammation. We studied the effects of UFP inhalation on the gut microbiome and intestinal mucosa in two hyperlipidemic mouse models (ApoE-/- mice and Ldlr-/- mice) and normolipidemic C57BL/6 mice. Mice were exposed to PM in the ultrafine-size range by inhalation for 6 h a day, 3 times a week for 10 weeks at a concentration of 300-350 µg/m3.16S rRNA gene sequencing was performed to characterize sequential changes in the fecal microbiome during exposures, and changes in the intestinal microbiome at the end. PM exposure led to progressive differentiation of the microbiota over time, associated with increased fecal microbial richness and evenness, altered microbial composition, and differentially abundant microbes by week 10 depending on the mouse model. Cross-sectional analysis of the small intestinal microbiome at week 10 showed significant changes in α-diversity, ß-diversity, and abundances of individual microbial taxa in the two hyperlipidemic models. These alterations of the intestinal microbiome were not accompanied, and therefore could not be caused, by increased intestinal inflammation as determined by histological analysis of small and large intestine, cytokine gene expression, and levels of fecal lipocalin. In conclusion, 10-week inhalation exposures to UFPs induced taxonomic changes in the microbiome of various animal models in the absence of intestinal inflammation.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes Atmosféricos / Microbioma Gastrointestinal Idioma: En Ano de publicação: 2024 Tipo de documento: Article
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Poluentes Atmosféricos / Microbioma Gastrointestinal Idioma: En Ano de publicação: 2024 Tipo de documento: Article