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Inflammatory Bowel Disease: Focus on Molecular Research

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Pathology, Diagnostics, and Therapeutics".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1387

Special Issue Editors


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Guest Editor
Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
Interests: inflammatory bowel disease; inflammation; inflammation resolution; macrophage biology; macrophage efferocytosis; oxidized lipids; LC-MS/MS; intestinal epithelial biology; intestinal epithelium under homeostasis and repair; intestinal barrier function; GI mucosal immunity

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Guest Editor
Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
Interests: inflammatory bowel disease; C. difficile infection; metabolic diseases; Crohn’s disease; intestinal fibrosis

Special Issue Information

Dear Colleagues,

Inflammatory bowel disease (IBD) is a chronic and relapsing inflammatory disorder of the GI tract that affects nearly 1 in 100 people in the US and exhibits increasing worldwide prevalence. The etiology of IBD is incompletely understood, but involves a dysregulated immune response to gut microbiota engendered by environmental triggers in genetically susceptible individuals. Modern molecular techniques have partially elucidated the underlying mechanisms of this multifactorial disease. GWAS studies have implicated over 200 genetic susceptibility factors in IBD, whose underlying functions are still being investigated. Shotgun metagenomic and 16s RNA sequencing have characterized microbial dysbiosis associated with IBD. Immunophenotyping, spatial transcriptomics, and whole- and single-cell RNA sequencing have shed light on the interplay of immune cells within affected tissue, while enabling the phenotyping of IBD patients. Proteomic, lipidomic, and metabolomic analyses have identified circulating biomarkers and possible therapeutic targets. Nonetheless, while there exist several recently approved biologic and targeted therapies for IBD, these exhibit a consistent therapeutic ceiling of approximately 50%. The identification of additional biomarkers, actionable pathways, and novel therapeutics is needed.

This Special Issue aims to report the latest findings in the molecular biology of IBD. These studies can involve any modern molecular technique, such as proteomic, phosphoproteomic, lipidomic, or metabolomic analyses; genetic and gene expression analyses including spatial transcriptomics and single-cell RNA sequencing; mechanistic investigations involving animal and organoid models; and microbiological analyses including 16s RNA or shotgun metagenomic sequencing.

Dr. David Meriwether
Dr. Hon Wai Koon
Guest Editors

Manuscript Submission Information

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Keywords

  • inflammatory bowel disease
  • gut microbiota
  • genomic sequencing
  • proteomic
  • lipidomic
  • metabolomic
  • therapy
  • biomarker
  • animal and organoid model
 

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Published Papers (1 paper)

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16 pages, 4686 KiB  
Article
Ambient Particulate Matter Induces In Vitro Toxicity to Intestinal Epithelial Cells without Exacerbating Acute Colitis Induced by Dextran Sodium Sulfate or 2,4,6-Trinitrobenzenesulfonic Acid
by Candace Chang, Allen Louie, Yi Zhou, Rajat Gupta, Fengting Liang, Georgina Xanthou, Jason Ereso, Carolina Koletic, Julianne Ching Yang, Farzaneh Sedighian, Venu Lagishetty, Nerea Arias-Jayo, Abdulmalik Altuwayjiri, Ramin Tohidi, Mohamad Navab, Srinivasa Tadiparthi Reddy, Constantinos Sioutas, Tzung Hsiai, Jesus A. Araujo and Jonathan P. Jacobs
Int. J. Mol. Sci. 2024, 25(13), 7184; https://doi.org/10.3390/ijms25137184 - 29 Jun 2024
Cited by 1 | Viewed by 1043
Abstract
Inflammatory bowel disease (IBD) is an immunologically complex disorder involving genetic, microbial, and environmental risk factors. Its global burden has continued to rise since industrialization, with epidemiological studies suggesting that ambient particulate matter (PM) in air pollution could be a contributing factor. Prior [...] Read more.
Inflammatory bowel disease (IBD) is an immunologically complex disorder involving genetic, microbial, and environmental risk factors. Its global burden has continued to rise since industrialization, with epidemiological studies suggesting that ambient particulate matter (PM) in air pollution could be a contributing factor. Prior animal studies have shown that oral PM10 exposure promotes intestinal inflammation in a genetic IBD model and that PM2.5 inhalation exposure can increase intestinal levels of pro-inflammatory cytokines. PM10 and PM2.5 include ultrafine particles (UFP), which have an aerodynamic diameter of <0.10 μm and biophysical and biochemical properties that promote toxicity. UFP inhalation, however, has not been previously studied in the context of murine models of IBD. Here, we demonstrated that ambient PM is toxic to cultured Caco-2 intestinal epithelial cells and examined whether UFP inhalation affected acute colitis induced by dextran sodium sulfate and 2,4,6-trinitrobenzenesulfonic acid. C57BL/6J mice were exposed to filtered air (FA) or various types of ambient PM reaerosolized in the ultrafine size range at ~300 μg/m3, 6 h/day, 3–5 days/week, starting 7–10 days before disease induction. No differences in weight change, clinical disease activity, or histology were observed between the PM and FA-exposed groups. In conclusion, UFP inhalation exposure did not exacerbate intestinal inflammation in acute, chemically-induced colitis models. Full article
(This article belongs to the Special Issue Inflammatory Bowel Disease: Focus on Molecular Research)
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