Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P01189 (beta-endorphin)
 21,003 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This study examined the effects of human chorionic gonadotropin, adrenocorticotropin, human luteinizing hormone, and mouse epidermal growth factor on growth (thymidine incorporation) and steroidogenesis (dehydroepiandrosterone sulfate production) of human fetal zone adrenal cells in monolayer culture. Two preparations of human chorionic gonadotropin extracted from pregnancy urine were used, one highly purified (National Institutes of Health, CR-121) and one less pure (Sigma). Thymidine incorporation was increased twofold to tenfold in cultures exposed to the Sigma human chorionic gonadotropin preparation or to mouse epidermal growth factor as compared to control. Pure National Institutes of Health human chorionic gonadotropin and luteinizing hormone had no effect on growth. When adrenocorticotropin was added alone or in combination with Sigma human chorionic gonadotropin or mouse epidermal growth factor, growth was decreased. Dehydroepiandrosterone sulfate production was stimulated by adrenocorticotropin but not by human luteinizing hormone, human chorionic gonadotropin, or mouse epidermal growth factor. These results suggest that human pregnancy urine contains a growth factor which remains to be identified but that pure human chorionic gonadotropin has no mitogenic or steroidogenic effects on the cultured fetal zone cells of the human fetal adrenal gland.
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PMID:The effects of human chorionic gonadotropin on growth and steroidogenesis of the human fetal adrenal gland in vitro. 303 Jan 10

Adrenocorticotropic hormone (ACTH) inhibited replication in functional adrenal tumor cells with a concomitant stimulation of steroidogenesis and a characteristic change of morphology from a flattened to a spherical type. [(3)H]Thymidine incorporation into DNA was inhibited by about 50% 6 hours after ACTH treatment. Both cyclic AMP and dibutyryl cyclic AMP inhibited [(3)H]thymidine incorporation and caused the characteristic morphological change noted with ACTH. The extent of stimulation of steroidogenesis and the amount of inhibition of [(3)H]thymidine incorporation in response to various doses of ACTH were closely related and both were in parallel with the concentration of cyclic AMP in the cells. Cyclic GMP and cyclic IMP did not inhibit [(3)H]thymidine incorporation significantly, and did not change the morphology of the cells. AMP inhibited [(3)H]thymidine incorporation into DNA and caused the characteristic morphological change. However, AMP did not increase the cyclic AMP content of the cells. CMP, GMP, and UMP showed a significant inhibition of [(3)H]thymidine incorporation into DNA, but the extent of the inhibition was much less than that with AMP. These nucleotides did not change the morphology of the cells.
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PMID:Inhibition of replication in functional mouse adrenal tumor cells by adrenocorticotropic hormone mediated by adenosine 3':5'-cyclic monophosphate. 433 15

Thymidine incorporation into DNA was inhibited dose-dependently by beta-endorphin in rat fetal brain cell aggregate cultures. The inhibition was reversed partially by mu (cyclic D-Phe-Cys-Tyr-D-Trp-Orn-Thr- Pen-Thr amide) or kappa (norbinaltorphimine) antagonists. Complete blockade of the beta-endorphin inhibitory effect was achieved only on concomitant exposure to both antagonists. Eadie-Hofstee analysis revealed that beta-endorphin inhibited thymidine incorporation noncompetitively. In the presence of protease inhibitors, beta-endorphin decreased thymidine incorporation with an IC50 of 0.7 nM. Truncated and N-acetylated beta-endorphin derivatives, which bind with low affinity to opioid receptors, did not affect thymidine incorporation. These findings indicate that beta-endorphin at physiological concentrations can regulate thymidine incorporation in cultured brain cells.
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PMID:Beta-endorphin is a potent inhibitor of thymidine incorporation into DNA via mu- and kappa-opioid receptors in fetal rat brain cell aggregates in culture. 838 Apr 43