17640
There was no intersection with genes which were merely up - or downregulated by ER alpha expression and only 9 and 11 genes overlapping targets which were regulated by leptin stimulation either in ER alpha - expressing or ER alpha - negative MDA - MB - 231 cells , respectively .
 None
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