1766
The non - invasive human melanoma cell line , IF6 , which does not express uPA , provided further confirmation of PAI - 1 and uPA ' s role as , upon transfection with uPA , this cell line attained an invasive phenotype , which was again attenuated by MAI - 12 .
 melanoma cell line, IF6, cell line
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 melanoma cell line, IF6, cell line