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Longitudinal metabolomics profiling of serum amino acids in rotenone-induced Parkinson's mouse model

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Abstract

Recently, the detailed etiology and pathogenesis of Parkinson's disease (PD) have not been fully clarified yet. Increasing evidences suggested that the disturbance of peripheral branched-chain amino acids (BCAAs) metabolism can promote the occurrence and progression of neurodegenerative diseases through neuroinflammatory signaling. Although there are several studies on the metabolomics of PD, longitudinal study of metabolic pathways is still lacking. Therefore, the purpose of the present study was to determine the longitudinal alterations in serum amino acid profiles in PD mouse model. Gas chromatography-mass spectrometry (GC–MS) was applied to detect serum amino acid concentrations in C57BL/6 mice after 0, 3 and 4 weeks of oral administration with rotenone. Then the data were analysed by principal component analysis (PCA) and orthogonal projection to latent structures (OPLS) analysis. Finally, the correlations between different kinds of serum amino acids and behaviors in rotenone-treated mice were also explored. Compared with 0-week mice, the levels of l-isoleucine and l-leucine were down-regulated in 3-week and 4-week mice, especially in 4-week mice. Moreover, the comprehensive analysis showed that l-isoleucine and l-leucine were negatively correlated with pole-climbing time and positively correlated with fecal weight and water content of PD mice. These results not only suggested that l-isoleucine and l-leucine may be potential biomarkers, but also pointed out the possibility of treating PD by intervening in the circulating amino acids metabolism.

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Abbreviations

PD:

Parkinson's disease

BCAAs:

Branched-chain amino acids

GC–MS:

Gas chromatography–mass spectrometry

OPLS-DA:

Orthogonal projections to latent structures-discriminant analysis

α-syn:

α-Synuclein

SN:

Substantia nigra

CNS:

Central nervous system

PNS:

Peripheral nervous system

ANOVA:

One-way analysis of variance

SD:

Standard deviation

PLS-DA:

Partial least squares discriminant analysis

CV-ANOVA:

Cross-validation ANOVA

FDR:

False discovery rate

VIP:

Variable importance in projection

ROC:

Receiver operating characteristic

AUC:

Area under the ROC curve

FC:

Fold change

ENS:

Enteric nervous system

mTORC1:

Mechanistic target of rapamycin complex 1

SCFAs:

Short chain fatty acids

SRM:

Selective reaction monitor

RSD:

Relative standard deviation

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Funding

This work was supported by the National Natural Science Foundation of China [grant numbers 62072143, 81271208].

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Authors and Affiliations

Authors

Contributions

Conceptualization: ZY; methodology: ZY, FY, SW, KW and LY; formal analysis: ZY and WD; investigation: ZY; data curation: ZY, YS and RL; writing—original draft preparation: ZY; writing—review and editing: KW and LY; visualization: ZY and WD; supervision: KW and LY; project administration: ZY; funding acquisition: LY. All authors have read and agreed to the published version of the manuscript.

Corresponding authors

Correspondence to Kai Wang or Lifen Yao.

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Conflict of interest

The authors declare no competing financial interest.

Ethical approval

This animal study was approved by the Animal Use and Care Committee of the First Affiliated Hospital of Harbin Medical University.

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Handling editor: D. Tsikas.

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Yan, Z., Yang, F., Wen, S. et al. Longitudinal metabolomics profiling of serum amino acids in rotenone-induced Parkinson's mouse model. Amino Acids 54, 111–121 (2022). https://doi.org/10.1007/s00726-021-03117-1

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  • DOI: https://doi.org/10.1007/s00726-021-03117-1

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