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Erschienen in: Obesity Surgery 9/2018

09.07.2018 | Original Contributions

Increased Bile Acids and FGF19 After Sleeve Gastrectomy and Roux-en-Y Gastric Bypass Correlate with Improvement in Type 2 Diabetes in a Randomized Trial

verfasst von: Reza Nemati, Jun Lu, Dech Dokpuang, Michael Booth, Lindsay D. Plank, Rinki Murphy

Erschienen in: Obesity Surgery | Ausgabe 9/2018

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Abstract

Background

Sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB) are both effective bariatric procedures to treat type 2 diabetes (T2DM) and obesity. The contribution of changes in bile acids (BAs) and fibroblast growth factor19 (FGF19) to such metabolic improvements is unclear.

Methods

We examined associations between changes in BAs, FGF19 (fasting and prandial), with changes in body weight, glycemia, and other metabolic variables in 61 obese patients with T2DM before and 1 year after randomization to SG or RYGB.

Results

Weight loss and diabetes remission (defined by HbA1c < 39 mmol/mol [< 5.7%] in the absence of glucose-lowering therapy) after RYGB and SG was similar (mean weight loss − 29 vs − 31 kg, p = 0.50; diabetes remission proportion 37.5 vs 34%, p = 1.0). Greater increments in fasting and prandial levels of total, secondary, and unconjugated BAs were seen after RYGB than SG. Fasting and prandial increases in total (r = − 0.3, p = 0.01; r = − 0.2, p = 0.04), secondary (r = − 0.3, p = 0.01; r = − 0.4, p = 0.01) and unconjugated BA (r = − 0.3, p = 0.01; r = 0.4, p < 0.01) correlated with decreases in HbA1c, but not weight. Changes in 12α-OH/non 12α-OH were positively associated with prandial glucose increments (r = 0.2, p = 0.03), HbA1c (r = 0.3, p = 0.01), and negatively associated with changes in insulinogenc index (r = − 0.3, p = 0.01). Only changes in prandial FGF19 were negatively associated with HbA1c (r = − 0.4, p < 0.01) and visceral fat (r = − 0.3, p = 0.04).

Conclusions/interpretation

The association between increases in secondary, unconjugated BAs and improvements in HBA1c (but not weight) achieved after both RYGB and SG suggest manipulation of BA as a potential strategy for controlling T2DM through weight-independent means.
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Metadaten
Titel
Increased Bile Acids and FGF19 After Sleeve Gastrectomy and Roux-en-Y Gastric Bypass Correlate with Improvement in Type 2 Diabetes in a Randomized Trial
verfasst von
Reza Nemati
Jun Lu
Dech Dokpuang
Michael Booth
Lindsay D. Plank
Rinki Murphy
Publikationsdatum
09.07.2018
Verlag
Springer US
Erschienen in
Obesity Surgery / Ausgabe 9/2018
Print ISSN: 0960-8923
Elektronische ISSN: 1708-0428
DOI
https://doi.org/10.1007/s11695-018-3216-x

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