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Metabolomic abnormalities of purine and lipids implicated olfactory bulb dysfunction of CUMS depressive rats

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Abstract

Major depressive disorder (MDD) is a serious mood disorder and leads to a high suicide rate as well as financial burden. The volume and function (the sensitivity and neurogenesis) of the olfactory bulb (OB) were reported to be altered among the MDD patients and rodent models of depression. In addition, the olfactory epithelium was newly reported to decrease its volume and function under chronic unpredictable mild stress (CUMS) treatment. However, the underlying molecular mechanism still remains unclear. Herein, we conducted the non-targeted metabolomics method based on gas chromatography-mass spectrometry (GC-MS) coupled with multivariate statistical analysis to characterize the differential metabolites in OB of CUMS rats. Our results showed that 19 metabolites were categorized into two perturbed pathways: purine metabolism and lipid metabolism, which were regarded as the vital pathways concerned with dysfunction of OB. These findings indicated that the turbulence of metabolic pathways may be partly responsible for the dysfunction of OB in MDD.

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Acknowledgements

This work was financially supported by the National Key Research and Development Program of China (2017YFA0505700), the Non-profit Central Research Institute Fund of Chinese Academy of Medical Sciences (2019PT320002) and the National Key Program International Cooperation Project (No. 81820108015).

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Correspondence to Ke Cheng or Peng Xie.

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He, Y., Wang, Y., Wu, Z. et al. Metabolomic abnormalities of purine and lipids implicated olfactory bulb dysfunction of CUMS depressive rats. Metab Brain Dis 35, 649–659 (2020). https://doi.org/10.1007/s11011-020-00557-8

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  • DOI: https://doi.org/10.1007/s11011-020-00557-8

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