7651
Analyses of the regulation of IkappaBalpha in TNF-alpha -treated T lymphocytes from young and elderly donors revealed severely compromised degradation of IkappaBalpha in T cells from the elderly .
 T cells, IkappaBalpha, IkappaBalpha, TNF-alpha -treated T lymphocytes, TNF-alpha
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:
 T cells, IkappaBalpha, IkappaBalpha, TNF-alpha -treated T lymphocytes, TNF-alpha