Skip to main content
Log in

Prenatal expression of d-aspartate oxidase causes early cerebral d-aspartate depletion and influences brain morphology and cognitive functions at adulthood

  • Original Article
  • Published:
Amino Acids Aims and scope Submit manuscript

Abstract

The free d-amino acid, d-aspartate, is abundant in the embryonic brain but significantly decreases after birth. Besides its intracellular occurrence, d-aspartate is also present at extracellular level and acts as an endogenous agonist for NMDA and mGlu5 receptors. These findings suggest that d-aspartate is a candidate signaling molecule involved in neural development, influencing brain morphology and behaviors at adulthood. To address this issue, we generated a knockin mouse model in which the enzyme regulating d-aspartate catabolism, d-aspartate oxidase (DDO), is expressed starting from the zygotic stage, to enable the removal of d-aspartate in prenatal and postnatal life. In line with our strategy, we found a severe depletion of cerebral d-aspartate levels (up to 95%), since the early stages of mouse prenatal life. Despite the loss of d-aspartate content, Ddo knockin mice are viable, fertile, and show normal gross brain morphology at adulthood. Interestingly, early d-aspartate depletion is associated with a selective increase in the number of parvalbumin-positive interneurons in the prefrontal cortex and also with improved memory performance in Ddo knockin mice. In conclusion, the present data indicate for the first time a biological significance of precocious d-aspartate in regulating mouse brain formation and function at adulthood.

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.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10

Similar content being viewed by others

References

Download references

Acknowledgements

We thank Massimo Pasqualetti and Mehdi Eshraghi for their helpful discussion and comments.

Funding

This work was supported by a grant from MIUR (Ministero dell’Istruzione, dell’Università e della Ricerca, Progetto PRIN 2017—Project nr 2017M42834) to A.U.

Author information

Authors and Affiliations

Authors

Corresponding authors

Correspondence to Alessandro Usiello or Francesco Errico.

Ethics declarations

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All research involving animals was carried out in accordance with the Italian directive of the Ministry of Health governing animal welfare and protection (D.LGS26/2014), and approved by “Direzione Generale della Sanità e dei Farmaci Veterinari (Ufficio 6)” (permission nr 796/2018).

Informed consent

This article does not contain any studies with human participants performed by any of the authors.

Additional information

Handling editor: V. Bolshakov.

Publisher's Note

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

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

De Rosa, A., Mastrostefano, F., Di Maio, A. et al. Prenatal expression of d-aspartate oxidase causes early cerebral d-aspartate depletion and influences brain morphology and cognitive functions at adulthood. Amino Acids 52, 597–617 (2020). https://doi.org/10.1007/s00726-020-02839-y

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00726-020-02839-y

Keywords

Navigation