16919
When compared with the I / R mice group , in the I / R + CoPP mice group , the increased hepatic expression of HO - 1 was associated with a significant reduction in liver enzyme levels , fewer apoptotic hepatocytes cells were identified by morphological criteria and by immunohistochemistry for caspase - 3 , there was a decreased mean number of proliferating cells ( positively stained for Ki67 ) , and a reduced hepatic expression of : C / EBP homologous protein ( an index of endoplasmic reticulum stress ) , the NF - kappa B ' s regulated genes ( CIAP2 , MCP - 1 and IL - 6 ) , and increased hepatic expression of I kappa Ba ( the inhibitory protein of NF - kappa B ) .
 Chemical: CoPP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: CoPP