10221
Using a genetic model of intestinal epithelial cell ( IEC ) - restricted constitutive Wnt - activation , which comprises the most common event in the initiation of colon cancer , we demonstrate that NF - kappa B modulates Wnt signaling and show that IEC - specific ablation of RelA / p65 retards crypt stem cell expansion .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None