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Roux-en-Y Gastric Bypass Operation in Rats
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Published on: June 11, 2012

Gastric bypass surgery elevates NT-ProBNP levels.

Niclas Abrahamsson1, Britt Edén Engström, Magnus Sundbom

  • 1Department of Medical Sciences, Uppsala University, Uppsala 751 85, Sweden. niclas.abrahamsson@medsci.uu.se

Obesity Surgery
|March 5, 2013
PubMed
Summary
This summary is machine-generated.

Gastric bypass surgery rapidly increases N-terminal pro-brain natriuretic peptide (NT-ProBNP) levels in obese patients. This change in NT-ProBNP response is not linked to weight loss or metabolic improvements.

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08:16

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Published on: November 10, 2018

Area of Science:

  • Cardiology
  • Endocrinology
  • Bariatric Surgery

Background:

  • Brain natriuretic peptide (BNP) is a cardiac hormone affected by myocardial stretch.
  • Obesity is associated with reduced BNP responsiveness.
  • Previous bariatric procedures showed varied effects on BNP levels.

Purpose of the Study:

  • To investigate the impact of gastric bypass surgery (GBP) on N-terminal pro-brain natriuretic peptide (NT-ProBNP) levels in obese patients.
  • To explore the relationship between NT-ProBNP changes and weight loss or metabolic parameters post-GBP.

Main Methods:

  • Studied 20 obese patients (mean BMI 44.6 kg/m²) undergoing GBP.
  • Measured NT-ProBNP, glucose, and insulin preoperatively and at multiple time points up to 1 year post-surgery.
  • Assessed changes in BMI and HOMA indices.

Main Results:

  • NT-ProBNP levels significantly increased post-surgery, peaking on day 2 and remaining elevated at 1 year (125% increase).
  • Glucose, insulin, and HOMA indices decreased post-GBP.
  • The 1-year BMI reduction (from 44.6 to 30.5 kg/m²) did not correlate with NT-ProBNP changes.

Conclusions:

  • Gastric bypass surgery alters BNP release mechanisms independently of weight loss or metabolic changes.
  • GBP shifts obese individuals from low to high NT-ProBNP responders.
  • These findings may impact cardiac function assessment in post-GBP patients.