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Abstract
The present study assessed if kainic acid activates oxytocinergic neurons and this activation is blocked by 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX). Dual immunohistochemistry for oxytocin and c-Fos showed that oxytocin neurons in SON and PVN express c-Fos following kainic acid administration, a significant increase when compared to the control group. Administration of CNQX prior to kainic acid caused a significant reduction. The results suggested the participation of non-NMDA receptors in the regulation of oxytocin neurons because the administration of kainic acid activates these neurons and this activation is blocked by CNQX administration.