European Journal of Nutrition

, Volume 56, Issue 8, pp 2519–2527 | Cite as

Oral citrulline supplementation protects female mice from the development of non-alcoholic fatty liver disease (NAFLD)

  • Cathrin Sellmann
  • Cheng Jun Jin
  • Anna Janina Engstler
  • Jean-Pascal De Bandt
  • Ina Bergheim
Original Contribution

Abstract

Purpose

Impairments of intestinal barrier function are discussed as risk factors for the development and progression of non-alcoholic fatty liver disease (NAFLD). Studies suggest an association between arginine/citrulline homeostasis and the development of liver damages. Here, the effect of an oral l-citrulline (Cit) supplement on the development of a Western-style diet (WSD)-induced NAFLD was determined in mice.

Methods

Female 6- to 8-week-old C57BL/6J mice were either pair-fed a liquid Western-style or control diet (C) ± 2.5 g/kg bodyweight Cit for 6 weeks (C + Cit or WSD + Cit). Indices of liver damage, glucose metabolism, intestinal barrier function and NO synthesis were measured.

Results

While bodyweight gain was similar between groups, markers of glucose metabolism like fasting blood glucose and HOMA index and markers of liver damage like hepatic triglyceride levels, number of neutrophils and plasminogen activator inhibitor-1 protein levels were significantly lower in WSD + Cit-fed mice when compared to WSD-fed mice only. Protein levels of the tight junction proteins occludin and zonula occludens-1 in duodenum were significantly lower in mice fed a WSD when compared to those fed a WSD + Cit (−~70 and −~60 %, respectively, P < 0.05), whereas portal endotoxin levels, concentration of 3-nitrotyrosine protein adducts in duodenum and toll-like receptor-4 mRNA expression in livers of WSD + Cit-fed mice were markedly lower than in WSD-fed mice (−~43 %, P = 0.056; −~80 and −~48 %, respectively, P < 0.05).

Conclusion

Our data suggest that the protective effects of supplementing Cit on the development of NAFLD in mice are associated with a decreased translocation of endotoxin into the portal vein.

Keywords

Citrulline Intestinal barrier function Endotoxin Occludin Non-alcoholic fatty liver disease 

Abbreviations

ALT

Alanine aminotransferase

AST

Aspartate aminotransferase

C

Control

Cit

l-Citrulline

HOMA index

Homeostasis model assessment index

iNOS

Inducible nitric oxide synthase

MYD88

Myeloid differentiation primary response gene 88

NAFLD

Non-alcoholic fatty liver disease

NAS

Non-alcoholic fatty liver disease activity score

NASH

Non-alcoholic steatohepatitis

PAI-1

Plasminogen activator inhibitor 1

TG

Triglycerides

Tlr

Toll-like receptor

TNFα

Tumor necrosis factor alpha

WSD

Western-style diet

ZO-1

Zonula occludens 1

3-NT

3-Nitrotyrosine

4-HNE

4-Hydroxynonenal protein adducts

Supplementary material

394_2016_1287_MOESM1_ESM.pdf (400 kb)
Supplementary material 1 (PDF 400 kb)
394_2016_1287_MOESM2_ESM.pdf (166 kb)
Supplementary material 2 (PDF 166 kb)
394_2016_1287_MOESM3_ESM.pdf (144 kb)
Supplementary material 3 (PDF 144 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Cathrin Sellmann
    • 1
  • Cheng Jun Jin
    • 1
  • Anna Janina Engstler
    • 1
  • Jean-Pascal De Bandt
    • 2
    • 3
  • Ina Bergheim
    • 1
  1. 1.Institute of Nutritional Sciences, SD Model Systems of Molecular NutritionFriedrich-Schiller University JenaJenaGermany
  2. 2.Nutrition Biology Laboratory EA4466, Faculty of PharmacyParis Descartes University, Sorbonne Paris CitéParisFrance
  3. 3.Clinical Chemistry Department, Paris Centre University HospitalsAPHPParisFrance

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