13848
In functional studies, interferon-gamma -stimulated PIEC clones transfected with this mutated CIITA construct failed to stimulate purified human CD4+ T lymphocytes .
 human CD4+ T lymphocytes, interferon-gamma, interferon-gamma -stimulated PIEC clones, CIITA, PIEC clones, mutated CIITA
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:
 human CD4+ T lymphocytes, interferon-gamma, interferon-gamma -stimulated PIEC clones, CIITA, PIEC clones, mutated CIITA