11222
In BZ , there was increased mRNA expression of Casp - 3 ( BZ vs Controls : 0 . 51 +/- 0 . 15 vs 1 . 39 +/- 0 . 04 , p < 0 . 001 ) , a significant decrease in Bcl - 2 ( by 63 % ) , associated with an increase in apoptotic cells , as revealed by TUNEL staining and cleaved - Casp - 3 presence .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None