Evidence map›Paper›PMID 37088121›Full record

ArticleMetabolism: clinical and experimental2023

MLX plays a key role in lipid and glucose metabolism in humans: Evidence from in vitro and in vivo studies.

Shilpa R Nagarajan, Eilidh J Livingstone, Thomas Monfeuga, Lara C Lewis, Shahul Hameed Liyakath Ali, Anandhakumar Chandran, David J Dearlove, Matt J Neville, Lingyan Chen, Cyrielle Maroteau and 2 more

Open access · hybridAbstract read
In one paragraph

Article in Metabolism: clinical and experimental, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.8field-weighted citation impact, top 17% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 10 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 3 institutions in 2 countries.

Shilpa R NagarajanOxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Oxford, UK.
Eilidh J LivingstoneNovo Nordisk Research Centre Oxford, Innovation Building, Oxford, UK.
Thomas MonfeugaNovo Nordisk Research Centre Oxford, Innovation Building, Oxford, UK.
Lara C LewisNovo Nordisk Research Centre Oxford, Innovation Building, Oxford, UK.
Shahul Hameed Liyakath AliNovo Nordisk Research Centre Oxford, Innovation Building, Oxford, UK.
Anandhakumar ChandranNovo Nordisk Research Centre Oxford, Innovation Building, Oxford, UK.
David J DearloveOxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Oxford, UK.
Matt J NevilleOxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Oxford, UK; National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospital Trusts, UK.
Lingyan ChenNovo Nordisk Research Centre Oxford, Innovation Building, Oxford, UK.
Cyrielle MaroteauNovo Nordisk Research Centre Oxford, Innovation Building, Oxford, UK.
Maxwell A RubyNovo Nordisk Research Centre Oxford, Innovation Building, Oxford, UK. Electronic address: mwry@novonordisk.com.
Leanne HodsonOxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Churchill Hospital, Oxford, UK; National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospital Trusts, UK. Electronic address: leanne.hodson@ocdem.ox.ac.uk.
Novo Nordisk (Finland) · FIOxford Centre for Diabetes, Endocrinology and Metabolism · GBUniversity of Oxford · GB

Funding

Biotechnology and Biological Sciences Research Council BB/N005600/1Biotechnology and Biological Sciences Research Council BB/N015665/1Biotechnology and Biological Sciences Research Council BB/R012512/1Biotechnology and Biological Sciences Research Council BBS/E/F/000PR10347British Heart Foundation FS/15/56/31645British Heart Foundation FS/SBSRF/21/31013British Heart Foundation RE/18/3/34214
6 · The paper itself

Abstract

BACKGROUND AND

aimEnhanced hepatic de novo lipogenesis (DNL) has been proposed as an underlying mechanism for the development of NAFLD and insulin resistance. Max-like protein factor X (MLX) acts as a heterodimer binding partner for glucose sensing transcription factors and inhibition of MLX or downstream targets has been shown to alleviate intrahepatic triglyceride (IHTG) accumulation in mice. However, its effect on insulin sensitivity remains unclear. As human data is lacking, the aim of the present work was to investigate the role of MLX in regulating lipid and glucose metabolism in primary human hepatocytes (PHH) and in healthy participants with and without MLX polymorphisms.

methodsPHH were transfected with non-targeting or MLX siRNA to assess the effect of MLX knockdown on lipid and glucose metabolism, insulin signalling and the hepatocellular transcriptome. A targeted association analysis on imputed genotype data for MLX on healthy individuals was undertaken to assess associations between specific MLX SNPs (rs665268, rs632758 and rs1474040), plasma biochemistry, IHTG content, DNL and gluconeogenesis.

resultsMLX knockdown in PHH altered lipid metabolism (decreased DNL (p < 0.05), increased fatty acid oxidation and ketogenesis (p < 0.05), and reduced lipid accumulation (p < 0.001)). Additionally, MLX knockdown increased glycolysis, lactate secretion and glucose production (p < 0.001) and insulin-stimulated pAKT levels (p < 0.01) as assessed by transcriptomic, steady-state and dynamic measurements. Consistent with the in vitro data, individuals with the rs1474040-A and rs632758-C variants had lower fasting plasma insulin (p < 0.05 and p < 0.01, respectively) and TG (p < 0.05 and p < 0.01, respectively). Although there was no difference in IHTG or gluconeogenesis, individuals with rs632758 SNP had notably lower hepatic DNL (p < 0.01).

conclusionWe have demonstrated using human in vitro and in vivo models that MLX inhibition favored lipid catabolism over anabolism and increased glucose production, despite increased glycolysis and phosphorylation of Akt, suggesting a metabolic mechanism that involves futile cycling.

Indexed as

Insulin ResistanceNon-alcoholic Fatty Liver DiseaseAnimalsBasic Helix-Loop-Helix Leucine Zipper Transcription FactorsGluconeogenesisGlucoseHumansInsulinLipid MetabolismLipogenesisLiverMiceTranscription FactorsTriglyceridesBasic Helix-Loop-Helix Leucine Zipper Transcription FactorsGlucoseInsulinMLX protein, humanTranscription FactorsTriglyceridesDNLGlucoseHepatocytesHumanInsulinMLX

Identifiers

PMID37088121
PMCPMC10687193
OpenAlexW4366607138

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.