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Concomitant western diet and chronic-binge alcohol dysregulate hepatic metabolism.

PloS one
May 5, 2023
Delfin Gerard Buyco et al. (15 authors)
Journal ArticleResearch Support, N.I.H., ExtramuralAnimal Study
Study Details

Study Goal

The researchers aimed to understand the combined effects of an obesogenic Western diet (high-fructose, high-fat, high-cholesterol) and chronic-binge alcohol consumption on liver disease progression.

Results Summary

The study found that combining the Western diet with alcohol led to greater weight gain, glucose intolerance, steatosis, and dysregulated lipid metabolism compared to either factor alone, indicating synergistic harm.

Population

Male C57BL6/J mice

Effective Dosage

High-fructose, high-fat, high-cholesterol diet (FFC) for 4 weeks, followed by 5% ethanol in drinking water plus weekly 2.5 g/kg ethanol gavage for 12 weeks

Duration

16 weeks total (4 weeks diet, 12 weeks diet + alcohol)

Interactions

None mentioned

Extracted Claims (15)
InterventionDirectionEndpointPopulationDosageImpactClaim #
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
body weight gain
Male C57BL6/J mice
-
induced more
#1
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
glucose intolerance
Male C57BL6/J mice
-
induced more
#2
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
steatosis
Male C57BL6/J mice
-
induced more
#3
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
hepatomegaly
Male C57BL6/J mice
-
induced more
#4
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
decrease
hepatic protein kinase B (AKT) protein expression
Male C57BL6/J mice
-
was associated with decreased
#5
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
gluconeogenic gene expression
Male C57BL6/J mice
-
was associated with increased
#6
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
hepatic triglyceride levels
Male C57BL6/J mice
-
increased
#7
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
hepatic ceramide levels
Male C57BL6/J mice
-
increased
#8
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
plasma leptin levels
Male C57BL6/J mice
-
increased
#9
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
hepatic Perilipin 2 protein expression
Male C57BL6/J mice
-
increased
#10
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
decrease
lipolytic gene expression
Male C57BL6/J mice
-
decreased
#11
High-fructose, high-fat, high-cholesterol diet (FFC)
increase
AMP-activated protein kinase (AMPK) activation
Male C57BL6/J mice
-
increased
#12
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
AMP-activated protein kinase (AMPK) activation
Male C57BL6/J mice
-
increased
#13
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
genes involved in immune response
Male C57BL6/J mice
-
enriched the hepatic transcriptome for
#14
Combined high-fructose, high-fat, high-cholesterol diet and ethanol administration (FFC-EtOH)
increase
genes involved in lipid metabolism
Male C57BL6/J mice
-
enriched the hepatic transcriptome for
#15
Abstract

BACKGROUND AND AIMS: There is significant overlap between non-alcoholic fatty liver disease (NAFLD) and alcohol-associated liver disease (ALD) with regards to risk factors and disease progression. However, the mechanism by which fatty liver disease arises from concomitant obesity and overconsumption of alcohol (syndrome of metabolic and alcohol-associated fatty liver disease; SMAFLD), is not fully understood. METHODS: Male C57BL6/J mice were fed chow diet (Chow) or high-fructose, high-fat, high-cholesterol diet (FFC) for 4 weeks, then administered either saline or ethanol (EtOH, 5% in drinking water) for another 12 weeks. The EtOH treatment also consisted of a weekly 2.5 g EtOH/kg body weight gavage. Markers for lipid regulation, oxidative stress, inflammation, and fibrosis were measured by RT-qPCR, RNA-seq, Western blot, and metabolomics. RESULTS: Combined FFC-EtOH induced more body weight gain, glucose intolerance, steatosis, and hepatomegaly compared to Chow, EtOH, or FFC. Glucose intolerance by FFC-EtOH was associated with decreased hepatic protein kinase B (AKT) protein expression and increased gluconeogenic gene expression. FFC-EtOH increased hepatic triglyceride and ceramide levels, plasma leptin levels, hepatic Perilipin 2 protein expression, and decreased lipolytic gene expression. FFC and FFC-EtOH also increased AMP-activated protein kinase (AMPK) activation. Finally, FFC-EtOH enriched the hepatic transcriptome for genes involved in immune response and lipid metabolism. CONCLUSIONS: In our model of early SMAFLD, we observed that the combination of an obesogenic diet and alcohol caused more weight gain, promoted glucose intolerance, and contributed to steatosis by dysregulating leptin/AMPK signaling. Our model demonstrates that the combination of an obesogenic diet with a chronic-binge pattern alcohol intake is worse than either insult alone.

Medical Subject Headings (MeSH)
MiceAnimalsMaleLeptinDiet, WesternGlucose IntoleranceAMP-Activated Protein KinasesEthanolLiverLiver Diseases, AlcoholicNon-alcoholic Fatty Liver DiseaseObesityLipid MetabolismDiet, High-FatMice, Inbred C57BL
Study Links
Quality Scores
Safety20
Efficacy85/10
Quality75/10
Citation Metrics
Total Citations7
Citations/Year3.5
Relative Citation Ratio1.46
NIH Percentile64.2%
Research Impact Scores
APT Score0.50
Weight Score1.98
Normalized Score0.57
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