853
We have shown previously that potentiation of mGlu1 receptors reduces spontaneous occurring spike and wave discharges ( SWDs ) in the WAG / Rij rat model of absence epilepsy , whereas activation of mGlu2 / 3 and mGlu4 receptors produces the opposite effect .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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