3860
We asked whether TRPA1 contributes to carrageenan - induced hyperalgesia in rats , and if so , whether this contribution is mediated by mechanisms involved in inflammation such as cytokine release and neutrophil migration and / or by a direct sensitization of the primary afferent nociceptors .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None