2032
Thus , potentiation of netrin activity by inhibitors may result from stabilization of DCC on the axons , and proteolytic activity may regulate axon migration by controlling the number of functional extracellular axon guidance receptors . .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 None