Modulation of CCK mRNA in cell lines in response to isoproterenol and retinoic acid.

Abstract:

:Regulation of cholecystokinin (CCK) expression was studied in the human neuroepithelioma cell line SK-N-MCIXC and the rat medullary thyroid carcinoma cell line WE 4/2. The cells were treated with the beta-adrenergic agonist isoproterenol and retinoic acid, a natural derivative of vitamin A, which plays a role in cell growth and proliferation. Levels of CCK mRNA were determined after 6, 12 and 24 h drug treatments, with Northern blot analysis using human CCK riboprobes. In WE 4/2 cells no differences were observed in CCK mRNA levels, between control and isoproterenol treated cells, after 6, 12 or 24 h treatments. In SK-N-MCIXC cells isoproterenol increased CCK mRNA levels at all time points examined, the beta-adrenergic antagonist propranolol blocked this effect. SK-N-MCIXC cells were also treated with actinomycin D or cycloheximide in combination with isoproterenol. Actinomycin D decreased CCK mRNA levels. Cycloheximide increased CCK mRNA levels when compared to isoproterenol acting alone. Retinoic acid did not affect CCK mRNA levels in WE 4/2 cells. In SK-N-MCIXC cells, retinoic acid consistently decreased CCK mRNA level. CCK mRNA levels in SK-N-MCIXC cells treated with retinoic acid combined with either isoproterenol or phorbol-12-myristate-13 acetate, were not significantly different from cells treated with retinoic acid alone.

journal_name

Neuropeptides

journal_title

Neuropeptides

authors

Mania-Farnell BL,Botros IW,Davis TP

doi

10.1016/0143-4179(95)90064-0

subject

Has Abstract

pub_date

1995-10-01 00:00:00

pages

221-7

issue

4

eissn

0143-4179

issn

1532-2785

pii

0143-4179(95)90064-0

journal_volume

29

pub_type

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