8702
Finally , we demonstrated that WEV + NP robustly decreased the expression of anti - apoptotic effectors , such as B cell Lymphoma - 2 ( Bcl - 2 ) , B cell Lymphoma - extra large ( Bcl - ( XL ) ) and myeloid cell leukemia sequence - 1 ( Mcl - 1 ) , and increased the expression of pro - apoptotic effectors , such as Bcl - 2 homologous antagonist / killer ( Bak ) , Bcl - 2 - associated X protein ( Bax ) and Bcl - 2 - interacting mediator of cell death ( Bim ) .
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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