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11.12.2015 | Original Contributions | Ausgabe 8/2016

Obesity Surgery 8/2016

Combined Non-alcoholic Fatty Liver Disease and Type 2 Diabetes Mellitus: Sleeve Gastrectomy or Gastric Bypass?—a Controlled Matched Pair Study of 34 Patients

Zeitschrift:
Obesity Surgery > Ausgabe 8/2016
Autoren:
Adrian T. Billeter, Jonas Senft, Daniel Gotthardt, Philipp Knefeli, Felix Nickel, Thilo Schulte, Lars Fischer, Peter P. Nawroth, Markus W. Büchler, Beat P. Müller-Stich

Abstract

Introduction

Although all bariatric procedures improve non-alcoholic fatty liver disease (NAFLD) in metabolically sick obese patients, it remains unclear whether different procedures achieve similar effects. Sleeve gastrectomy (SG) and Roux-Y-gastric bypass (RYGB) were compared for their effects on liver function tests (LFT) and glycemic control in a highly selected group of metabolically sick obese patients with both elevated alanine aminotransferase (ALT), a common marker for NAFLD and type 2 diabetes mellitus (T2DM).

Methods

Thirty-four obese patients with a body mass index (BMI) >35 kg/m2, ALT > 35 U/L, and T2DM were well-matched from a prospective database and retrospectively analyzed. Seventeen patients each underwent RYGB and SG, respectively. The effects on LFT and glycemic control were evaluated over 12 months.

Results

Both procedures significantly lowered ALT and aspartate aminotransferase (AST) after 12 months, but SG improved both LFT significantly better than RYGB (ALT 17.8 ± 8.8 vs. 31.1 ± 11.2 U/L, p = 0.003; AST 17.0 ± 8.8 vs. 24.3 ± 7.5 U/L, p = 0.004). In contrast to RYGB, SG normalized elevated ALT levels completely (41 vs. 0 %, p = 0.007). Both SG and RYGB improved insulin resistance, glycemic control, and reduced the need of insulin significantly without any difference between the procedures.

Conclusion

SG appears to improve LFT better than RYGB in well-matched obese patients with both elevated ALT and T2DM. This suggests that SG may have a better effect on NAFLD than RYGB with similar effects on glycemic control. The present findings should be verified in randomized controlled trials to obtain further evidence for the decision-making on the most appropriate bariatric procedure for metabolically sick patients.

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