14282
This study tested the in vitro and in vivo effects of beta - asarone on colorectal cancer cells by testing cell viability using human colorectal cell lines HT29 and SW480 in MTT assays ; tumorigenesis using xenografts in nude mice and a mouse model of colorectal cancer ; cell senescence using senescence - associated beta - galactosidase activity ; and expression of cancer and senescence - related proteins , specifically lamins , Oct - 1 , p53 , p21 , and p15 , by Western blot .
 Chemical: beta - asarone; Chemical: MTT
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: beta - asarone; Chemical: MTT