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In the three cancer cell lines used , we observe agonist - induced down - regulation of GPCR mRNAs for beta - 2 adrenergic receptor ( ADRB2 ) , prostaglandin E2 receptor subtype EP2 and prostaglandin E4 receptor subtype EP4 ( Figure 3 , Genes 3 , 4 , 12 ) , which were previously reported in DDT1 MF - 2 smooth muscle cells ( ADRB2 ) and 293 - EBNA human embryonic kidney cells ( prostaglandin E2 / E4 receptor subtypes EP2 / EP4 ) [ 20 ] , [ 21 ] .
 Anatomy: cancer cell lines; Anatomy: DDT1 MF - 2 smooth muscle cells; Anatomy: 293 - EBNA human embryonic kidney cells
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: cancer cell lines; Anatomy: DDT1 MF - 2 smooth muscle cells; Anatomy: 293 - EBNA human embryonic kidney cells