6794
This correlated with the initiation of signaling downstream of Notch, as evidenced by increased levels of HES-1 transcripts in co-cultivated T cells and of CD23 transcripts in co-cultivated B cells .
 B cells, HES-1 transcripts, CD23 transcripts, co-cultivated T cells, CD23
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:
 B cells, HES-1 transcripts, CD23 transcripts, co-cultivated T cells, CD23