Abstract:
:Mouse embryonal carcinoma (EC) cells of the P19 line can be induced to differentiate into neurons, astrocytes and fibroblasts by exposure to retinoic acid (RA), whereas treatment of the EC cells with dimethyl sulfoxide (DMSO) leads to differentiation into mesodermal tissues, including cardiac and skeletal muscle. In RA- but not DMSO-treated cultures, the level of c-myc mRNA underwent two transient increases. The concentration of c-myc mRNA in RA-treated cultures increased 3-fold after 3 h in the presence of the drug, returned to normal by 9 h, increased again 5-fold from 48 to 96 h, and finally decreased below pre-treatment values by 144 h. Increased levels of c-myc protein were observed at the times of elevated c-myc mRNA. Nuclear run-on assays of the c-myc gene and measurements of c-myc mRNA stability indicated that both transcriptional and post-transcriptional mechanisms contribute to the modulated expression of the c-myc gene. The two transient increases in c-myc expression suggest a role for the c-myc protein in the differentiation of cells along neuroectodermal lineages.
journal_name
Oncogenejournal_title
Oncogeneauthors
St-Arnaud R,Nepveu A,Marcu KB,McBurney MWsubject
Has Abstractpub_date
1988-11-01 00:00:00pages
553-9issue
5eissn
0950-9232issn
1476-5594journal_volume
3pub_type
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