Abstract
Background/Aim
Roux-en-Y gastric bypass (RYGB) with a long biliopancreatic limb (BPL) was demonstrated to further improve type 2 diabetes (T2D) outcomes. Whether benefits occur at the cost of a negative impact on nutrient absorption is a matter of debate. Our aim was to evaluate the impact of RYGB BPL length on short-term nutrient absorption.
Methods
Subjects (N = 20) submitted to RYGB with a 2 m BPL (n = 11) or standard BPL (60–100 cm) (n = 9) 4.2 ± 0.4 years earlier underwent a mixed meal tolerance test. Plasma metabolites were analyzed at baseline and after meal by nuclear magnetic resonance (NMR) spectroscopy. Spectra were subject to multivariate analysis (MVA). Partial least square discriminant analysis (PLS-DA) was used to identify metabolites responsible for group discrimination.
Results
Principal component analysis and PLS-DA showed a clear separation between plasma metabolites before and 30 min after meal intake in both groups. The metabolites responsible for differences between time points were glucose and branched-chain amino acids. A complete overlap in metabolite species and concentrations was observed at 0 and 30 min time points for both groups, while acetate levels 120 min after the meal intake were significantly higher in subjects submitted to RYGB with a 2-m-long BPL as compared to the group submitted to the standard RYGB procedure.
Conclusions
Post-prandial plasma metabolomics profiles suggest that a 2-m-long BLP RYGB does not have a negative impact on acute metabolite absorption. RYGB BPL length seems to influence post-prandial acetate levels, which could contribute to the additional positive metabolic outcomes.
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Acknowledgments
Authors would like to thank Sandra Tavares (Centro Hospitalar de Entre o Douro e Vouga, Santa Maria da Feira, Portugal), Bárbara Patrício (UMIB, Porto, Portugal), and Tiago Morais (UMIB, Porto, Portugal), for their assistance during the MMTT.
Funding
The study was funded by grants from Foundation for Science and Technology (FCT) Portugal (UID/Multi/00215/2019). JJH holds an unrestricted grant from the NNF Center for Basic Metabolic Research, Copenhagen, Denmark. The NNF foundation Center for Basic Metabolic Research is an independent research institution at the University of Copenhagen, Denmark.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
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Jarak, I., Pereira, S.S., Carvalho, R.A. et al. Gastric Bypass with Different Biliopancreatic Limb Lengths Results in Similar Post-absorptive Metabolomics Profiles. OBES SURG 30, 1068–1078 (2020). https://doi.org/10.1007/s11695-019-04294-5
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DOI: https://doi.org/10.1007/s11695-019-04294-5