2705
Furthermore , crosstalk between the BMP and Wnt pathways affected BMP signaling activity , osteoblast differentiation , and bone formation , suggesting Wnt signaling is an upstream regulator of BMP signaling .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None