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Analysis of the effect of Rhodopseudomonas palustris on the lead exposure rat model using 1H-NMR-based metabolomics of urine and plasma

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Abstract

Background

Rhodopseudomonas palustris had the effect of adsorbing and removing lead ions. Metabolomics is a comprehensive analysis based on several metabolites or biomarkers.

Objective

The paper aimed to investigate the restorative effect and the potential mechanisms of R. palustris in rats with the lead exposure model using 1H-NMR metabolomics.

Results

Nine endogenous metabolites from rat plasma and 13 endogenous metabolites from rat urine were identified as potential biomarkers of the symptoms of lead poisoning. The changes of metabolites levels in the plasma included lower levels of valine, acetoacetate, and N-acetyl-glycoprotein and a higher concentration of lactate, acetate, creatine, threonine, glutamine, and asparagine in model group compared with control group. Furthermore, increased citrate, succinate, dimethylamine, pyruvate, acetoacetate, α-oxoglutarate and asparagine, accompanied by decreased LDL/VLDL, taurine, creatinine, glucose and hippurate levels were observed in the model group compared with the control group in the urine. Biochemical parameters and histopathology examination dovetailed well with the metabolomics data. Treatment with R. palustris at a certain degree returned the levels of these metabolites to normal levels. Plasma and urine metabolomic analysis showed changes associated with energy metabolism, amino acids and fatty acid metabolism of lead exposure rats.

Conclusion

The effects of removing lead ions of R. palustris in rats with lead exposure were confirmed. This research demonstrated that 1H-NMR-based metabolomics was a promising tool to identify potential biomarkers and unravel protective effect mechanisms of R. palustris in lead poisoning rats.

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Data availability statement

The data presented in this study are available on request from the corresponding author.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 30672621, 81173473), Taiyuan city science and technology project special talents star project (120247-08), Central Government Guides Local Scientific and Technological Development Fund Projects (YDZX 20201400001443), Shanxi International Science and Technology Cooperation Project (201803D421065), Shanxi Provincial Key Research and Development Project (No. 201903D321083).

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Contributions

Conceptualization, SC, ZZ, YL, YH, HY, JC, HB and GY; methodology, SC, YL and YH; formal analysis, SC and ZZ; investigation, SC, ZZ, YL, YH, HY, JC, HB and GY; resources, HB and GY; data curation, SC, ZZ, YL, YH; writing—original draft preparation, SC; writing—review and editing, HY and JC, HB and GY; visualization, SC and ZZ; supervision, HB and GY; funding acquisition, HB and GY; All authors have read and agreed to the published version of the manuscript.

Corresponding author

Correspondence to Guan-e Yang.

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Shutong Chai, Ziyun Zheng, Yani Liu, Yanhui Liang, Hong Yang, Jie Chen, Hongjuan Bai and Guan-e Yang declare that they have no competing interests.

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All animal handling and experimental protocols conformed to the guidelines stipulated by the institutional animal ethical committee.

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Chai, S., Zheng, Z., Liu, Y. et al. Analysis of the effect of Rhodopseudomonas palustris on the lead exposure rat model using 1H-NMR-based metabolomics of urine and plasma. Mol. Cell. Toxicol. 19, 321–331 (2023). https://doi.org/10.1007/s13273-022-00261-x

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