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Secreted from activated T cells and macrophages , bone marrow-derived MIP-1 alpha /GOS19 inhibits primitive hematopoietic stem cells and appears to be involved in the homeostatic control of stem cell proliferation .
 marrow-derived MIP-1 alpha /GOS19, MIP-1 alpha, /GOS19, macrophages, T cells, stem cell, activated T cells, primitive hematopoietic stem cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 marrow-derived MIP-1 alpha /GOS19, MIP-1 alpha, /GOS19, macrophages, T cells, stem cell, activated T cells, primitive hematopoietic stem cells