Skip to main content
Log in

Interactive effects of dietary leucine and isoleucine affect amino acid profile and metabolism through AKT/TOR signaling pathways in blunt snout bream (Megalobrama amblycephala)

  • Published:
Fish Physiology and Biochemistry Aims and scope Submit manuscript

Abstract

The purpose of this research is to explore the interaction between dietary leucine and isoleucine levels on whole-body composition, plasma and liver biochemical indexes, amino acids deposition in the liver, and amino acid metabolism of blunt snout bream (Megalobrama amblycephala). The test fish (average weight: 56.00 ± 0.55 g) were fed one of six diets at random containing two leucine levels (1.70% and 2.50%) and three isoleucine levels (1.00%, 1.20%, and 1.40%) for 8 weeks. The results showed that the final weight and weight gain rate were the highest in the fish fed low-level leucine and high-level isoleucine diets (P > 0.05). Furthermore, the crude lipid content was significantly adjusted by diets with diverse levels of leucine and isoleucine (P < 0.05). In addition, interactive effects of these two branched-chain amino acids (BCAAs) were found on plasma total protein, blood ammonia, and blood urea nitrogen of test fish (P < 0.05). Additionally, the liver amino acid profiles were significantly influenced by the interactive effects of the two BCAAs (P < 0.05). Moreover, interactive effects of dietary leucine and isoleucine were significantly observed in the expressions of amino acid metabolism-related genes (P < 0.05). These findings suggested that dietary leucine and isoleucine had interaction. Meanwhile, the interaction between them was more conducive to the growth and quality improvement of blunt snout bream when the dietary leucine level was 1.70% and isoleucine level was 1.40%.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

Data availability

The data sets supporting the results of this article are included within the article and its additional files.

Code availability

Not applicable.

References

Download references

Funding

This research was supported by the Development Plan Project in Key Areas of Guangdong Province (Project No: 2020B0202010001), the Jiangsu Natural Science Foundation for basic research (BK20201325), and the earmarked fund for CARS (CARS-45–12).

Author information

Authors and Affiliations

Authors

Contributions

Mang-mang Wang, Guang-zhen Jiang, and Wen-bin Liu provided ideas and schemes for this experiment; Mang-mang Wang and Yang-yang Huang completed the feeding trial; Mang-mang Wang, Yi-lin Zhang, and Jing-Wei Fan assisted sampling. Mang-mang Wang finished data analysis and manuscript writing; Kang Xiao, Xi Wang, Hui-xing Guo, Xiang-fei Li, and Guang-zhen Jiang polished the manuscript.

Corresponding author

Correspondence to Guang-zhen Jiang.

Ethics declarations

Ethics approval

All tests relating to animals were carried out by the Guidance of the Care and Use of Laboratory Animals in China. This research got permission from the Animal Care and Use Committee of Nanjing Agricultural University (Nanjing, China) (permit number: SYXK (Su) 2011–0036).

Consent to participate

Not applicable.

Consent for publication

Not applicable.

Conflict of interest

The authors declare no competing interests.

Additional information

Publisher's note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Highlights

• Interaction between leucine and isoleucine affects the bioavailability of leucine and isoleucine in blunt snout bream.

• The interaction between leucine and isoleucine will affect their ratio in feed.

• The best combinations of leucine and isoleucine in dietary of blunt snout bream would be LL-HI.

Supplementary information

Below is the link to the electronic supplementary material.

Supplementary file1 (DOCX 350 KB)

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Wang, Mm., Huang, Yy., Liu, Wb. et al. Interactive effects of dietary leucine and isoleucine affect amino acid profile and metabolism through AKT/TOR signaling pathways in blunt snout bream (Megalobrama amblycephala). Fish Physiol Biochem 50, 385–401 (2024). https://doi.org/10.1007/s10695-022-01161-6

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10695-022-01161-6

Keywords

Navigation