Histamine modulates the expression of c-fos through cyclic AMP production via the H2 receptor in the human promonocytic cell line U937
We examined the effects of histamine and its agonists on the expression of the c-fos and c-myc proto-oncogenes at the transcriptional and translational levels in the human promonocytic U937 cell line. Histamine transiently increased cAMP and c-fos expression through H2 receptors. Dibutyryl cAMP also...
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todo:paper_0026895X_v51_n6_p983_Shayo2023-10-03T14:37:10Z Histamine modulates the expression of c-fos through cyclic AMP production via the H2 receptor in the human promonocytic cell line U937 Shayo, C. Davio, C. Brodsky, A. Mladovan, A.G. Legnazzi, B.L. Rivera, E. Baldi, A. 1 (5 isoquinolinesulfonyl) 2 methylpiperazine bisindolylmaleimide bucladesine cyclic AMP cyclic AMP dependent protein kinase inhibitor dimaprit histamine histamine H2 receptor histamine H2 receptor antagonist messenger RNA prostaglandin E2 protein c fos protein kinase C inhibitor article cell differentiation cell growth chemotaxis controlled study histamine release human human cell monocyte oncogene c fos oncogene c myc priority journal stem cell We examined the effects of histamine and its agonists on the expression of the c-fos and c-myc proto-oncogenes at the transcriptional and translational levels in the human promonocytic U937 cell line. Histamine transiently increased cAMP and c-fos expression through H2 receptors. Dibutyryl cAMP also increased c-fos mRNA and protein, and levels remained elevated even after 12 hr of treatment. Dose-dependence studies using histamine and dimaprit showed that the EC50 values for cAMP production and c-fos increase were similar, suggesting that cAMP might be involved in c-fos induction via H2 receptors. Furthermore, studies carried out using H7, a protein kinase A/protein kinase C inhibitor, blocked c-fos induction, whereas no effect was observed with bisindolylmaleimide, a specific protein kinase C inhibitor. No modification of c-myc expression could be detected on treatment with histamine or its analogues. Nevertheless, dibutyryl cAMP induced a down- regulation of the levels of this proto-oncogene. In addition, dibutyryl cAMP inhibited cell growth in a dose-dependent manner, whereas histamine failed to affect proliferation and differentiation of U937 cells. Cells pretreated with dimaprit showed a decrease in the cAMP response to subsequent addition of H2 agonists, whereas the cAMP response to prostaglandin E2 remained unaltered. This homologous mechanism of H2 receptor desensitization was time dependent. These results indicate that histamine activates several mechanisms involved in the induction of differentiation, such as cAMP and c-fos production, but fails to promote differentiation of U937 cells, apparently due to the rapid desensitization of H2 receptors. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0026895X_v51_n6_p983_Shayo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
1 (5 isoquinolinesulfonyl) 2 methylpiperazine bisindolylmaleimide bucladesine cyclic AMP cyclic AMP dependent protein kinase inhibitor dimaprit histamine histamine H2 receptor histamine H2 receptor antagonist messenger RNA prostaglandin E2 protein c fos protein kinase C inhibitor article cell differentiation cell growth chemotaxis controlled study histamine release human human cell monocyte oncogene c fos oncogene c myc priority journal stem cell |
| spellingShingle |
1 (5 isoquinolinesulfonyl) 2 methylpiperazine bisindolylmaleimide bucladesine cyclic AMP cyclic AMP dependent protein kinase inhibitor dimaprit histamine histamine H2 receptor histamine H2 receptor antagonist messenger RNA prostaglandin E2 protein c fos protein kinase C inhibitor article cell differentiation cell growth chemotaxis controlled study histamine release human human cell monocyte oncogene c fos oncogene c myc priority journal stem cell Shayo, C. Davio, C. Brodsky, A. Mladovan, A.G. Legnazzi, B.L. Rivera, E. Baldi, A. Histamine modulates the expression of c-fos through cyclic AMP production via the H2 receptor in the human promonocytic cell line U937 |
| topic_facet |
1 (5 isoquinolinesulfonyl) 2 methylpiperazine bisindolylmaleimide bucladesine cyclic AMP cyclic AMP dependent protein kinase inhibitor dimaprit histamine histamine H2 receptor histamine H2 receptor antagonist messenger RNA prostaglandin E2 protein c fos protein kinase C inhibitor article cell differentiation cell growth chemotaxis controlled study histamine release human human cell monocyte oncogene c fos oncogene c myc priority journal stem cell |
| description |
We examined the effects of histamine and its agonists on the expression of the c-fos and c-myc proto-oncogenes at the transcriptional and translational levels in the human promonocytic U937 cell line. Histamine transiently increased cAMP and c-fos expression through H2 receptors. Dibutyryl cAMP also increased c-fos mRNA and protein, and levels remained elevated even after 12 hr of treatment. Dose-dependence studies using histamine and dimaprit showed that the EC50 values for cAMP production and c-fos increase were similar, suggesting that cAMP might be involved in c-fos induction via H2 receptors. Furthermore, studies carried out using H7, a protein kinase A/protein kinase C inhibitor, blocked c-fos induction, whereas no effect was observed with bisindolylmaleimide, a specific protein kinase C inhibitor. No modification of c-myc expression could be detected on treatment with histamine or its analogues. Nevertheless, dibutyryl cAMP induced a down- regulation of the levels of this proto-oncogene. In addition, dibutyryl cAMP inhibited cell growth in a dose-dependent manner, whereas histamine failed to affect proliferation and differentiation of U937 cells. Cells pretreated with dimaprit showed a decrease in the cAMP response to subsequent addition of H2 agonists, whereas the cAMP response to prostaglandin E2 remained unaltered. This homologous mechanism of H2 receptor desensitization was time dependent. These results indicate that histamine activates several mechanisms involved in the induction of differentiation, such as cAMP and c-fos production, but fails to promote differentiation of U937 cells, apparently due to the rapid desensitization of H2 receptors. |
| format |
JOUR |
| author |
Shayo, C. Davio, C. Brodsky, A. Mladovan, A.G. Legnazzi, B.L. Rivera, E. Baldi, A. |
| author_facet |
Shayo, C. Davio, C. Brodsky, A. Mladovan, A.G. Legnazzi, B.L. Rivera, E. Baldi, A. |
| author_sort |
Shayo, C. |
| title |
Histamine modulates the expression of c-fos through cyclic AMP production via the H2 receptor in the human promonocytic cell line U937 |
| title_short |
Histamine modulates the expression of c-fos through cyclic AMP production via the H2 receptor in the human promonocytic cell line U937 |
| title_full |
Histamine modulates the expression of c-fos through cyclic AMP production via the H2 receptor in the human promonocytic cell line U937 |
| title_fullStr |
Histamine modulates the expression of c-fos through cyclic AMP production via the H2 receptor in the human promonocytic cell line U937 |
| title_full_unstemmed |
Histamine modulates the expression of c-fos through cyclic AMP production via the H2 receptor in the human promonocytic cell line U937 |
| title_sort |
histamine modulates the expression of c-fos through cyclic amp production via the h2 receptor in the human promonocytic cell line u937 |
| url |
http://hdl.handle.net/20.500.12110/paper_0026895X_v51_n6_p983_Shayo |
| work_keys_str_mv |
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