Cited by 52Diet, Metabolism, and DiseaseGut microbiota and healthAdipokines, Inflammation, and Metabolic Diseases

Mechanistically different effects of fat and sugar on insulin resistance, hypertension, and gut microbiota in rats

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Ramos-Romero, Sara, Hereu, Mercè, Atienza, Lidia, Casas, Josefina, Jáuregui, Olga, Amézqueta, Susana, Dasilva, Gabriel, Medina, Isabel +3 more·2018·American Journal of Physiology-Endocrinology and Metabolism

Abstract

Insulin resistance (IR) and impaired glucose tolerance (IGT) are the first manifestations of diet-induced metabolic alterations leading to Type 2 diabetes, while hypertension is the deadliest risk factor of cardiovascular disease. The roles of dietary fat and fructose in the development of IR, IGT, and hypertension are controversial. We tested the long-term effects of an excess of fat or sucrose (fructose/glucose) on healthy male Wistar-Kyoto (WKY) rats. Fat affects IR and IGT earlier than fructose through low-grade systemic inflammation evidenced by liver inflammatory infiltration, increased levels of plasma IL-6, PGE 2, and reduced levels of protective short-chain fatty acids without triggering hypertension. Increased populations of gut Enterobacteriales and Escherichia coli may contribute to systemic inflammation through the generation of lipopolysaccharides. Unlike fat, fructose induces increased levels of diacylglycerols (lipid mediators of IR) in the liver, urine F 2-isoprostanes (markers of systemic oxidative stress), and uric acid, and triggers hypertension. Elevated populations of Enterobacteriales and E. coli were only detected in rats given an excess of fructose at the end of the study. Dietary fat and fructose trigger IR and IGT in clearly differentiated ways in WKY rats: early low-grade inflammation and late direct lipid toxicity, respectively; gut microbiota plays a role mainly in fat-induced IR, and hypertension is independent of inflammation-mediated IR. The results provide evidence that suggests that the combination of fat and sugar is potentially more harmful than fat or sugar alone when taken in excess.

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Crossref · 10.1152/ajpendo.00323.2017

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Authors
Ramos-Romero, S., Hereu, M., Atienza, L., Casas, J., Jáuregui, O., Amézqueta, S., Dasilva, G., Medina, I., Nogués, M. R., Romeu, M., & Torres, J. L.
Affiliations
  • Institute of Advanced Chemistry of Catalonia, Consejo Superior de Investigaciones Científicas (IQAC-CSIC), Barcelona, Spain
  • Consejo Superior de Investigaciones Científicas (ES)
  • Department of Pathology, Puerta del Mar University Hospital, Cádiz, Spain
  • Centres Científics i Tecnològics de la Universitat de Barcelona (ES)
  • Universitat de Barcelona (ES)
  • Instituto de Investigacións Mariñas (ES)
  • Faculty of Medicine and Health Sciences, Universitat Rovira i Virgili, Reus, Spain
  • Universitat Rovira i Virgili (ES)
Venue
American Journal of Physiology-Endocrinology and Metabolism
Published
2018-06-01
Volume
314
Issue
6
Pages
E552-E563
ISSN
  • 0193-1849 (ISSN-L)
  • 1522-1555
OpenAlex
W2781872300
Cited by
52
References
51
Citations by year
2025: 7 · 2024: 6 · 2023: 3 · 2022: 6 · 2021: 8 · 2020: 9 · 2019: 7 · 2018: 6
FWCI
5.96
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • American Journal of Physiology-Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Rovira & Virgili repository (submittedVersion, cc-by)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
  • Dipòsit Digital de la Universitat de Barcelona (Universitat de Barcelona) (submittedVersion, public-domain)
  • RISalud Institutional Health Repository of Andalucía (submittedVersion, other-oa)
Funders
  • Spanish Ministry of Economy and Competitiveness (AGL2013-49079-C2-1, 2-R, BES2014-068592)
  • Consejo Superior de Investigaciones Científicas
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diet, Metabolism, and Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
insulin resistance, hypertension, gut microbiota, dietary fat, fructose, sucrose, impaired glucose tolerance, low-grade inflammation, diacylglycerol, oxidative stress, uric acid, Enterobacterales, Escherichia coli, lipopolysaccharide, short-chain fatty acids, type 2 diabetes, Wistar-Kyoto rats
MeSH terms
Gastrointestinal Microbiome, Dietary Sugars, Animals, Blood Pressure, Dietary Fats, Drinking Behavior, Energy Metabolism, Hypertension, Insulin Resistance, Male, Rats, Inbred WKY, Signal Transduction, Weight Gain, Rats

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