Skip to main content
Log in

Intrastriatal Quinolinic Acid Administration Impairs Redox Homeostasis and Induces Inflammatory Changes: Prevention by Kynurenic Acid

  • Original Article
  • Published:
Neurotoxicity Research Aims and scope Submit manuscript

Abstract

Kynurenic acid (KYNA) and quinolinic acid (QUIN) are metabolites formed in the degradation of tryptophan (Trp). QUIN is a selective NMDA receptor antagonist and may exert neurotoxic effects, whereas KYNA is an agonist of glutamatergic and cholinergic receptors and presents antioxidant properties. KYNA/QUIN ratio is decreased in several central nervous system disorders, but the mechanisms involved are not well elucidated. In the present study, we try to determine the neuroprotective capacity of KYNA on the QUIN effects in redox homeostasis changes (H2DCF oxidation, superoxide dismutase/catalase (SOD/CAT) ratio, glutathione peroxidase (GPx) activity, sulfhydryl content, and nitrite levels), as well as on inflammatory parameters (levels of TNF-α, IL-1β, and IL-6). KYNA and QUIN effects on the activities of Na+,K+-ATPase and acetylcholinesterase (AChE) were also evaluated. Thirty-day-old male Wistar rats underwent stereotactic surgery and received intrastriatal injections as follows: group 1—control (PBS-injected), group 2—KYNA (100 μM), group 3—QUIN (150 nM), and group 4—KYNA + QUIN (KYNA-injected followed QUIN-injected). Results demonstrated that the KYNA administration was able to prevent the increase in reactive oxygen species, SOD/CAT ratio, and pro-inflammatory cytokines (IL-1β and IL-6) and the decrease in GPx activity, sulfhydryl content, and nitrite levels caused by QUIN. KYNA was also able to partially prevent the decrease in Na+,K+-ATPase activity and the increase in AChE activity caused by QUIN. This study may help in the elucidation of neuroprotective effects of KYNA against oxidative and inflammatory insults caused by QUIN in the striatum of young male Wistar rats.

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
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others

References

Download references

Funding

This work was supported by Universal Edital (401507/2016)/Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq-Brazil), INCT (EN 465671/2014-4)/Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) – Brazil and PRONEX(16/2551-0000465-0)/Fundação de Amparo à Pesquisa do Rio Grande do Sul (FAPERGS).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Angela T. S. Wyse.

Ethics declarations

The ethical standards followed the official governmental guidelines issued by the Brazilian Federal of Societies for Experimental Biology, following the Guide for Care and Use of Laboratory Animals and Arouca Law (11.794/2008) and the experimental protocol was approved by the University Ethics Committee (CEUA) under the project #31435.

Conflict of Interest

The authors declare that they have no conflicts of interest.

Additional information

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

Ferreira, F.S., Schmitz, F., Marques, E.P. et al. Intrastriatal Quinolinic Acid Administration Impairs Redox Homeostasis and Induces Inflammatory Changes: Prevention by Kynurenic Acid. Neurotox Res 38, 50–58 (2020). https://doi.org/10.1007/s12640-020-00192-2

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12640-020-00192-2

Keywords

Navigation