30615
Evidence has been gained for a mechanism for inhibition of metastatic activities in MDA - MB - 231 cells by 4 and 5 , involving inactivation of the expression of p - FAK and paxillin through the integrin - mediated antimetastatic pathway .
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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:
 None