Endocrine

, Volume 43, Issue 1, pp 100–107

Assessment of endothelial function in patients with nonalcoholic fatty liver disease

  • Yasar Colak
  • Ebubekir Senates
  • Atakan Yesil
  • Yusuf Yilmaz
  • Oguzhan Ozturk
  • Levent Doganay
  • Ender Coskunpinar
  • Ozlem Timirci Kahraman
  • Banu Mesci
  • Celal Ulasoglu
  • Ilyas Tuncer
Original Article

Abstract

In this study, we aimed to evaluate the endothelial functions in patients with nonalcoholic fatty liver disease (NAFLD). In this observational case–control study, a total of 51 patients with NAFLD in study group and a total of 21 with age- and sex-equivalent individuals in control group were enrolled. In both patients and control groups, levels of asymmetric dimethylarginine (ADMA), systemic endothelial function (brachial artery flow-mediated dilation) (FMD) and carotid artery intima-media thickness (C-IMT) were measured. FMD and C-IMT were evaluated by vascular ultrasound. Plasma levels of ADMA were measured by ELISA. C-IMT was significantly higher in patients with NAFLD group than control group (0.67 ± 0.09 vs. 0.52 ± 0.11 mm, P < 0.001). The average C-IMT measurements were found in groups of control, simple steatosis, and NAFLD with (borderline and definite) NASH as 0.52 ± 0.11, 0.63 ± 0.07, and 0.68 ± 0.1 mm, respectively. The differences between groups were significant (P < 0.001). Measurement of brachial artery FMD was significantly lower in patients with NAFLD group compared to control group (7.3 ± 4.8 vs. 12.5 ± 7.1 %, P < 0.001). FMD measurements in groups of control, the simple steatosis, and NAFLD with NASH as 12.5 ± 7.1, 9.64 ± 6.63, and 7.03 ± 4.57 %, respectively, and the differences were statistically significant (P < 0.001). The increase in C-IMT and decrease in FMD was independent from metabolic syndrome and it was also more evident in patients with simple steatosis and NASH compared to control group. There was no significant difference between the control and NAFLD groups in terms of plasma ADMA levels (0.61 ± 0.11 vs. 0.69 ± 0.37 μmol/L, P = 0.209). Our data suggested that NAFLD is associated with endothelial dysfunction and increased earlier in patients with atherosclerosis compared to control subjects.

Keywords

Endothelial dysfunction Carotid artery intima-media thickness Brachial artery flow-mediated dilatation Asymmetric dimethylarginine 

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Yasar Colak
    • 1
  • Ebubekir Senates
    • 2
  • Atakan Yesil
    • 2
  • Yusuf Yilmaz
    • 3
    • 4
  • Oguzhan Ozturk
    • 1
  • Levent Doganay
    • 1
  • Ender Coskunpinar
    • 5
  • Ozlem Timirci Kahraman
    • 5
  • Banu Mesci
    • 6
  • Celal Ulasoglu
    • 1
  • Ilyas Tuncer
    • 1
  1. 1.Department of GastroenterologyIstanbul Medeniyet Universty Medical Faculty, Istanbul Goztepe Education and Research HospitalIstanbulTurkey
  2. 2.Department of GastroenterologyHaydarpasa Education and Research HospitalIstanbulTurkey
  3. 3.Department of GastroenterologyMarmara University, School of MedicineIstanbulTurkey
  4. 4.Institute of GastroenterologyMarmara UniversityIstanbulTurkey
  5. 5.Department of Molecular MedicineInstitute of Experimental Medicine (DETAE), Istanbul UniversityIstanbulTurkey
  6. 6.Department of Internal MedicineIstanbul Medeniyet University Medical Faculty, Istanbul Goztepe Education and Research HospitalIstanbulTurkey

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