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Collectively , our data establish that both SMAD2 / 3 and NF kappa B signaling pathways support GCT cell viability and suggest the existence of a positive feedback loop between NF kappa B and SMAD3 signaling in late - stage GCT .
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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:
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