Adenosine and NMDA Receptors Modulate Neuroprotection-Induced NMDA Preconditioning in Mice

• Published in: Journal of molecular neuroscience Vol. 70; no. 4; pp. 590 - 599
• Main Authors: Ghislandi, Adriana B., Garcez, Michelle L., Zambon, Gabriela M., Constantino, Leandra C., Matos, Douglas N., Pescador, Bruna B., Tasca, Carla I., Boeck, Carina R.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.04.2020; Springer Nature B.V
• Subjects: Adenosine; Adenosine A2A receptors; Animals; Anticonvulsants - administration & dosage; Anticonvulsants - pharmacology; Anticonvulsants - therapeutic use; Biomedical and Life Sciences; Biomedicine; Cell Biology; Cell viability; Convulsions; Glutamic acid receptors (ionotropic); Hippocampus; Hippocampus - drug effects; Hippocampus - metabolism; Injections, Intraperitoneal; Latency; Male; Mice; N-Methyl-D-aspartic acid receptors; N-Methylaspartate - administration & dosage; N-Methylaspartate - pharmacology; N-Methylaspartate - therapeutic use; Neurochemistry; Neurology; Neuroprotection; Neuroprotective Agents - administration & dosage; Neuroprotective Agents - pharmacology; Neuroprotective Agents - therapeutic use; Neurosciences; Preconditioning; Proteomics; Quinolinic acid; Quinolinic Acid - toxicity; Receptors; Receptors, N-Methyl-D-Aspartate - metabolism; Receptors, Purinergic P1 - metabolism; Seizures; Seizures - drug therapy; Seizures - etiology; Time dependence; Neuroprotection; Adenosine receptors; Convulsion; NMDA receptors; NMDA preconditioning
• ISSN: 0895-8696; 1559-1166
• DOI: 10.1007/s12031-019-01463-0

The severity score of quinolinic acid (QA)-induced seizures was investigated after N-methyl-D-aspartate (NMDA) preconditioning associated with adenosine receptors. Also, the levels of adenosine A 1 and A 2A receptors and subunits of NMDA receptors in the hippocampi of mice were determined to define components of the resistance mechanism. Adult CF-1 mice were treated intraperitoneally with saline or NMDA (75 mg/kg), and some mice were treated intracerebroventricularly (i.c.v.) with 0.1 pmol of adenosine receptor antagonists 8-cyclopentyltheophylline (CPT; receptor A 1 ) or ZM241385 (receptor A 2A ) 0, 1, or 6 h after NMDA administration. These adenosine receptor antagonists were administered to block NMDA’s protective effect. Seizures and their severity scores were evaluated during convulsions induced by QA (36.8 nmol) that was administered i.c.v. 24 h after NMDA. The cell viability and content of subunits of the NMDA receptors were analyzed 24 h after QA administration. NMDA preconditioning reduced the maximal severity 6 displayed in QA-administered mice, inducing protection in 47.6% of mice after QA-induced seizures. CPT increased the latency of seizures when administered 0 or 6 h, and ZM241385 generated the same effect when administered 6 h after NMDA administration. The GluN1 content was lower in the hippocampi of the QA mice and the NMDA-preconditioned animals without seizures. GluN2A content was unaltered in all groups. The results demonstrated the components of resistance evoked by NMDA, in which adenosine receptors participate in a time-dependent mode. Similarly, the reduction on GluN1 expression in the hippocampus may contribute to this effect during the preconditioning period.