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Published in: European Journal of Nutrition 5/2023

25-04-2023 | Insulins | Original Contribution

Evaluation of pea/rice and amylopectin/chromium as an alternative protein source to improve muscle protein synthesis in rats

Authors: Oguzhan Ozdemir, Fusun Erten, Besir Er, Cemal Orhan, James R. Komorowski, Sarah Sylla, Sara Perez Ojalvo, Kazim Sahin

Published in: European Journal of Nutrition | Issue 5/2023

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Abstract

Background

A preclinical study reported that the combination of an amylopectin/chromium complex (ACr) of branched-chain amino acids (BCAA) significantly enhanced muscle protein synthesis (MPS). This study was conducted to determine the effects of the addition of ACr complex to a pea/rice (PR) protein on MPS, insulin, muslin levels, and the mTOR pathway in exercised rats.

Methods

Twenty-four rats were divided into three groups: (i) exercise (Ex); (ii) Ex + PR 1:1 blend (0.465 g/kg BW); (iii) Ex + PR + ACr (0.155 g/kg BW). On the day of single-dose administration, after the animals were exercised at 26/m/min for 2 h, the supplement was given by oral gavage. The rats were injected with a bolus dose (250 mg/kg BW, 25 g/L) of deuterium-labeled phenylalanine to determine the protein fractional synthesis rate (FSR) one h after consuming the study product.

Results

The combination of PR and ACr enhanced MPS by 42.55% compared to the Ex group, while Ex + PR alone increased MPS by 30.2% over the Ex group (p < 0.0001) in exercised rats. Ex + PR plus ACr significantly enhanced phosphorylation of mTOR and S6K1 (p < 0.0001), and 4E-BP1 (p < 0.001) compared to the Ex (p < 0.0001). PR to ACr also significantly increased insulin and musclin levels (p < 0.0001) in exercised rats. Additionally, compared to Ex + PR alone, Ex + PR + ACr enhanced mTOR (p < 0.0001) and S6K1 (p < 0.0001) levels.

Conclusion

These data suggested that PR + ACr may provide an alternative to animal proteins for remodeling and repairing muscle by stimulating MPS and mTOR signaling pathways in post-exercised rats. More preclinical and clinical human studies on combining pea/rice and amylopectin/chromium complex are required.
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Literature
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Metadata
Title
Evaluation of pea/rice and amylopectin/chromium as an alternative protein source to improve muscle protein synthesis in rats
Authors
Oguzhan Ozdemir
Fusun Erten
Besir Er
Cemal Orhan
James R. Komorowski
Sarah Sylla
Sara Perez Ojalvo
Kazim Sahin
Publication date
25-04-2023
Publisher
Springer Berlin Heidelberg
Keywords
Insulins
Insulins
Published in
European Journal of Nutrition / Issue 5/2023
Print ISSN: 1436-6207
Electronic ISSN: 1436-6215
DOI
https://doi.org/10.1007/s00394-023-03150-8

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