4000
SREBP activation decreased as ECs migration slowed ; ( 2 ) Coincidental with SREBP activation , mRNA expression of its target genes such as low density lipoprotein receptor , HMG - CoA reductase , and fatty acid synthase also increased in migrating ECs population as detected by real - time PCR ; ( 3 ) Migration induced SREBP activation in ECs was inhibited by SREBP - acting protein RNAi and pharmacologically by 25 - hydroxycholesterol ; ( 4 ) Inhibition of SREBP led to decreased ECs migration in various models ; ( 5 ) Cells genetically deficient in SREBP - acting protein , S1P , or S2P , phenotypically exhibited impaired migration ; ( 6 ) SREBP inhibition in ECs suppressed the activity of small GTPase Cdc42 , a key molecule for ECs motility .
 ECs, ECs, ECs, ECs, Cells, ECs, ECs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 ECs, ECs, ECs, ECs, Cells, ECs, ECs