Chylomicrons promote intestinal absorption of lipopolysaccharides
Open accessAbstract
Recent data suggest that dietary fat promotes intestinal absorption of lipopolysaccharides (LPS) from the gut microflora, which might contribute to various inflammatory disorders. The mechanism of fat-induced LPS absorption is unclear, however. Intestinal-epithelial cells can internalize LPS from the apical surface and transport LPS to the Golgi. The Golgi complex also contains newly formed chylomicrons, the lipoproteins that transport dietary long-chain fat through mesenteric lymph and blood. Because LPS has affinity for chylomicrons, we hypothesized that chylomicron formation promotes LPS absorption. In agreement with our hypothesis, we found that CaCo-2 cells released more cell-associated LPS after incubation with oleic-acid (OA), a long-chain fatty acid that induces chylomicron formation, than with butyric acid (BA), a short-chain fatty acid that does not induce chylomicron formation. Moreover, the effect of OA was blocked by the inhibitor of chylomicron formation, Pluronic L-81. We also observed that intragastric triolein (TO) gavage was followed by increased plasma LPS, whereas gavage with tributyrin (TB), or TO plus Pluronic L-81, was not. Most intestinally absorbed LPS was present on chylomicron remnants (CM-R) in the blood. Chylomicron formation also promoted transport of LPS through mesenteric lymph nodes (MLN) and the production of TNFalpha mRNA in the MLN. Together, our data suggest that intestinal epithelial cells may release LPS on chylomicrons from cell-associated pools. Chylomicron-associated LPS may contribute to postprandial inflammatory responses or chronic diet-induced inflammation in chylomicron target tissues.
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Microbiota-derived LPS has been suggested to traverse the mucosal barrier on chylomicrons.
“Second, microbiota-derived LPS has been suggested to traverse the mucosal barrier of the intestine on chylomicrons, lipoprotein complexes that transport long-chain fatty acids from the gut lumen to the lymph and blood (Ghoshal et al., 2009; Khan et al., 2014; Sonnenburg and Bäckhed, 2016).”
From Understanding the Holobiont: How Microbial Metabolites Affect Human Health and Shape the Immune System (2017) · cites this paper as Ghoshal et al., 2009
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Impact of dietary fats on brain functions
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The Role of the Microbiome in Rheumatic Diseases
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Elevated Muscle TLR4 Expression and Metabolic Endotoxemia in Human Aging
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Mechanistic links between gut microbial community dynamics, microbial functions and metabolic health
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Endotoxemia, nutrition, and cardiometabolic disorders
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“Otherwise, LPS might be absorbed similar to dietary fatty acid via chylomicron synthesis [21,22].”
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- Authors
- Ghoshal, S., Witta, J., Zhong, J., de Villiers, W., & Eckhardt, E.
- Affiliations
- University of Kentucky (US)
- Corresponding author
- Eckhardt, Erik
- Venue
- Journal of Lipid Research
- Publisher
- Elsevier BV
- Published
- 2009-01
- Volume
- 50
- Issue
- 1
- Pages
- 90-97
- ISSN
- 0022-2275 (ISSN-L)
- OpenAlex
- W2044948009
- Cited by
- 662
- References
- 65
- Citations by year
- 2026: 24 · 2025: 34 · 2024: 34 · 2023: 37 · 2022: 38 · 2021: 46 · 2020: 41 · 2019: 36 · 2018: 40 · 2017: 47 · 2016: 47 · 2015: 43 · 2014: 37 · 2013: 51 · 2012: 39
- FWCI
- 9.18
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Lipid Research (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
- Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
- Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
- Keywords
- chylomicrons, lipopolysaccharide, intestinal absorption, dietary fat, oleic acid, butyrate, chylomicron formation, chylomicron remnants, mesenteric lymph nodes, TNF-α, intestinal epithelial cells, gut microbiota, diet-induced inflammation, triolein, tributyrin
- MeSH terms
- Animals, Cell Line, Chylomicrons, Fatty Acids, Humans, Intestinal Absorption, Lipopolysaccharides, Lymph Nodes, Male, Mice, Inbred C57BL, Models, Biological, Triglycerides, Caco-2 Cells, Poloxamer, Mice
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