26752
Human platelets co - cultured with HT29 cells rapidly adhered to cancer cells and induced COX - 2 mRNA expression , but not protein synthesis which required the late release of platelet PDGF and COX - 2 mRNA stabilization .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None