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A round trip from nonalcoholic fatty liver disease to diabetes: molecular targets to the rescue?

  • Amedeo Lonardo
  • Simonetta Lugari
  • Stefano Ballestri
  • Fabio Nascimbeni
  • Enrica Baldelli
  • Mauro Maurantonio
Review Article
  • 87 Downloads

Abstract

Evidence suggests a close relationship between nonalcoholic fatty liver disease (NAFLD) and type two diabetes (T2D). On the grounds of prevalence of disease, both conditions account for a significant financial cost for health care systems and individuals. Aim of this review article is to explore the epidemiological basis and the putative molecular mechanisms underlying the association of NAFLD with T2D. Epidemiological studies have shown that NAFLD is associated to the development of incident T2D and either reversal or improvement of NAFLD will result into decreased risk of developing incident T2D. On the other side of the coin data have shown that T2D will worsen the course of NAFLD doubling the risk of disease progression (i.e. evolution from simple steatosis to advanced fibrosis, cirrhosis, hepatocellular carcinoma, liver transplant and death). Conversely, NAFLD will contribute to metabolic decompensation of T2D. The pathogenesis of T2D in NAFLD patients may be mediated by several hepatokines impairing metabolic control. Among these, Fetuin-B, which causes glucose intolerance and is increased in patients with T2D and NAFLD with fibrosis is one of the most promising. T2D may affect the progression of NAFLD by acting at different levels of the pathogenic cascade involving gut microbiota and expanded, inflamed, dysfunctional adipose tissue. In conclusion, T2D and NAFLD are mutually, closely and bi-directionally associated. An improved understanding of molecular pathogenesis underlying this bi-directional association may allow us to be able to prevent the development of T2D by halting the progression of NAFLD.

Keywords

HCC Insulin resistance Natural history NASH Type 2 diabetes 

Abbreviations

ALT

Alanine transaminase

AST

Aspartate transaminase

BMI

Body mass index

CI

Confidence interval

DAG

Diacylglycerol

HCC

Hepatocellular carcinoma

HDL

High density lipoproteins

HOMA-IR

Homeostasis model assessment of insulin resistance

HR

Hazard ratio

IKKβ/NfκB pathway

IκB-kinase/nuclear factor κB pathway

IR

Insulin resistance

IL

Interleukin

LOXL2

Lysil oxidase 2

NAFLD

Nonalcoholic fatty liver disease

NASH

Nonalcoholic steatohepatitis

NFS

NAFLD fibrosis score

PDGFA

Platelet-derived growth factor A

PK

Protein kinase

RPG

Random plasma glucose

TNF

Tumor necrosis factor

T2D

Type 2 diabetes

WC

Waist circumference

Notes

Compliance with ethical standards

Conflict of interest

None of the authors has any conflict of interest to disclose.

Human and animal rights statement

This article does not contain any studies with human or animal subjects performed by any of the authors.

Informed consent

For this type of study formal consent is not required.

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Copyright information

© Springer-Verlag Italia S.r.l., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Azienda Ospedaliero-Universitaria Modena, UO di Medicina Metabolica, Ospedale Civile di BaggiovaraModenaItaly
  2. 2.Università di Modena e Reggio EmiliaModenaItaly
  3. 3.Azienda USL di Modena, Ospedale Di Pavullo, UO di MedicinaPavullo (Mo)Italy

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