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Following treatment with retinoic acid (RA), these cells differentiate into several cell types, including neurons, and steadily accumulate polyadenylated transcripts derived from the genes in a period ranging from 18 hr to 14 days of RA treatment. The sizes of major transcripts in differentiated EC cells coincide with those previously detected by the same probes in human embryos. Nuclear run\u2010on transcriptional analysis showed no difference in the transcription rate of the four homeobox genes in differentiated vs. undifferentiated EC cells. Inhibition of protein synthesis by 5\u201318 hr of treatment of undifferentiated cells with cycloeximide causes accumulation of some homeobox transcripts at levels comparable to those observed after 18 hr of RA induction, although it does not cause superinduction in fully differentiated cells. These data suggest that the activation of homeobox gene expression in RA\u2010induced EC cells is controlled, at least in part, by posttranscriptional mechanisms.<\/jats:p>","DOI":"10.1002\/mrd.1080010205","type":"journal-article","created":{"date-parts":[[2005,2,24]],"date-time":"2005-02-24T00:47:20Z","timestamp":1109206040000},"page":"107-115","source":"Crossref","is-referenced-by-count":12,"title":["Posttranscriptional control of human homeobox gene expression in induced NTERA\u20102 embryonal carcinoma 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