Cited by 1,069Liver Disease Diagnosis and TreatmentLipid metabolism and biosynthesisLipid metabolism and disorders

Increased de novo lipogenesis is a distinct characteristic of individuals with nonalcoholic fatty liver disease

Open access
Lambert, Jennifer E., Ramos–Roman, Maria A., Browning, Jeffrey D., Parks, Elizabeth J.·2014·Gastroenterology

Abstract

Background & aims There have been few studies of the role of de novo lipogenesis in the development of nonalcoholic fatty liver disease (NAFLD). We used isotope analyses to compare de novo lipogenesis and fatty acid flux between subjects with NAFLD and those without, matched for metabolic factors (controls).Methods We studied subjects with metabolic syndrome and/or levels of alanine aminotransferase and aspartate aminotransferase >30 mU/L, using magnetic resonance spectroscopy to identify those with high levels (HighLF, n = 13) or low levels (LowLF, n = 11) of liver fat. Clinical and demographic information was collected from all participants, and insulin sensitivity was measured using the insulin-modified intravenous glucose tolerance test. Stable isotopes were administered and gas chromatography with mass spectrometry was used to analyze free (nonesterified) fatty acid (FFA) and triacylglycerol flux and lipogenesis.Results Subjects with HighLF (18.4% ± 3.6%) had higher plasma levels of FFAs during the nighttime and higher concentrations of insulin than subjects with LowLF (3.1% ± 2.7%; P = .04 and P < .001, respectively). No differences were observed between groups in adipose flux of FFAs (414 ± 195 μmol/min for HighLF vs 358 ± 105 μmol/min for LowLF; P = .41) or production of very-low-density lipoprotein triacylglycerol from FFAs (4.06 ± 2.57 μmol/min vs 4.34 ± 1.82 μmol/min; P = .77). In contrast, subjects with HighLF had more than 3-fold higher rates of de novo fatty acid synthesis than subjects with LowLF (2.57 ± 1.53 μmol/min vs 0.78 ± 0.42 μmol/min; P = .001). As a percentage of triacylglycerol palmitate, de novo lipogenesis was 2-fold higher in subjects with HighLF (23.2% ± 7.9% vs 10.1% ± 6.7%; P < .001); this level was independently associated with the level of intrahepatic triacylglycerol (r = 0.53; P = .007).Conclusions By administering isotopes to subjects with NAFLD and control subjects, we confirmed that those with NAFLD have increased synthesis of fatty acids. Subjects with NAFLD also had higher nocturnal plasma levels of FFAs and did not suppress the contribution from de novo lipogenesis on fasting. These findings indicate that lipogenesis might be a therapeutic target for NAFLD.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1053/j.gastro.2013.11.049

Cites

58 of 58 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Fasting DNL correlated with plasma TAG concentrations and was higher in individuals with MASLD.

    “Fasting DNL correlated with plasma TAG concentrations48 and was higher in individuals with MASLD.49”
  • Postprandial DNL contributes to 15-26% of liver TAGs in individuals with MASLD vs. 1-6% in the fasting state in healthy individuals.

    “Postprandial DNL contributes to 15-26% of liver TAGs in individuals with MASLD49,56 vs. 1-6% in the fasting state in healthy individuals.48”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Lambert, J. E., Ramos–Roman, M. A., Browning, J. D., & Parks, E. J.
Affiliations
The University of Texas Southwestern Medical Center (US)
Corresponding author
Parks, Elizabeth J.
Venue
Gastroenterology
Publisher
Elsevier BV
Published
2014-03
Volume
146
Issue
3
Pages
726-735
ISSN
0016-5085 (ISSN-L)
OpenAlex
W2139351004
Cited by
1,069
References
58
Citations by year
2026: 67 · 2025: 111 · 2024: 110 · 2023: 108 · 2022: 124 · 2021: 111 · 2020: 106 · 2019: 92 · 2018: 75 · 2017: 47 · 2016: 49 · 2015: 45 · 2014: 23
FWCI
28.42
Type
journal article
Language
en
Open access
Locations
  • Gastroenterology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (RL1DK081187, UL1DE019584, UL1-RR024982)
  • National Center for Advancing Translational Sciences (RL1DK081187, UL1DE019584, UL1-RR024982)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
Keywords
de novo lipogenesis, non-alcoholic fatty liver disease, fatty acid synthesis, triglyceride synthesis, liver fat, metabolic syndrome, insulin sensitivity, stable isotope tracer studies, hepatic lipid metabolism, insulin
MeSH terms
Fatty Acids, Nonesterified, Fatty Liver, Female, Humans, Hyperlipidemias, Liver, Magnetic Resonance Imaging, Male, Comorbidity, Case-Control Studies, Metabolic Syndrome, Lipogenesis, Non-alcoholic Fatty Liver Disease

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review