2098
We first found that VA induces a major molecule of ER stress , CCAAT / enhancer binding protein homologous protein ( CHOP ) - dependent DR5 induction and subsequently increases TRAIL - induced cleavage of caspases and PARP in TRAIL - resistant Hep3B cells .
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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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