Cloning and sequence of cDNA for human placental cytokeratin 8. Regulation of the mRNA in trophoblastic cells by cAMP.
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Yamamoto R, Kao LC, McKnight CE, Strauss JF 3rd
Cloning and sequence of cDNA for human placental cytokeratin 8. Regulation of the mRNA in trophoblastic cells by cAMP.
Mol Endocrinol. 1990 Mar;4(3):370-4.
- PubMed ID
- 1692965 [ View in PubMed]
- Abstract
A 1735 bp cDNA for human placental cytokeratin 8 is described which encompasses the entire coding sequence as well as 33 and 250 base pairs of 5'- and 3'-untranslated region, respectively. The level of cytokeratin 8 mRNA in various fetal tissues and placentae of different gestational ages was determined as were the effects of 8-bromo-cAMP on cytokeratin 8 mRNA in primary cultures of cytotrophoblasts and JEG-3 choriocarcinoma cells. Cytokeratin 8 mRNA was abundant in fetal small intestine, placenta, pancreas, lung, liver, and kidney. Levels of cytokeratin 8 mRNA in placenta increased slightly during pregnancy. 8-Bromo-cAMP suppressed cytokeratin 8 mRNA in primary cultures of cytotrophoblasts, whereas the cAMP analog increased mRNA levels in JEG-3 cells, revealing differential regulation of this mRNA in normal and transformed trophoblastic cells.