1658
In this study , we sought to investigate in more detail the role of caspase - 3 in apoptotic processes in cultured cells and in cell - free extracts of breast cancer cells .
 cells, cell, extracts, breast cancer cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 cells, cell, extracts, breast cancer cells