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Title: The cannabinoid receptors agonist WIN55212-2 inhibits macrophageal differentiation and alters expression and phosphorylation of cell cycle control proteins
Authors: Paulsen, Katrin
Tauber, Svantje
Timm, Johanna
Goelz, Nadine
Dumrese, Claudia
Stolzing, Alexandra
Hass, Ralf
Ullrich, Oliver
Keywords: Immune control
Macrophages
Differentiation
Cannabinoids
Issue Date: 2011
Publisher: © 2011 Paulsen et al; licensee BioMed Central Ltd.
Citation: PAULSEN, K. ... et al, 2011. The cannabinoid receptors agonist WIN55212-2 inhibits macrophageal differentiation and alters expression and phosphorylation of cell cycle control proteins. Cell Communication and Signaling, 9:33, 16pp.
Abstract: In this study we investigated if and how cannabinoid receptor stimulation regulates macrophageal differentiation, which is one of the key steps in the immune effector reaction. For that reason, we used a well established differentiation model system of human U937 myelocytic leukemia cells that differentiate along the monocyte/macrophage lineage upon stimulation with the phorbol ester PMA. Constant cannabinoid receptor (CB) stimulation was performed using WIN55212-2, a potent synthetic CB agonist. We found that WIN55212-2 inhibited CB1/2-receptor-dependent PMA-induced differentiation of human myelocytic U937 cells into the macrophageal phenotype, which was associated with impaired vimentin, ICAM-1 and CD11b expression. In the presence of WIN55212-2, cdc2 protein and mRNA expression was progressively enhanced and Tyr-15-phosporylation of cdc2 was reduced in differentiating U937 cells. Additionally, p21§ssup§Waf1/Cip1 §esup§expression was up-regulated. PMA-induced apoptosis was not enhanced by WIN55212-2 and differentiation-associated c-jun expression was not altered. In conclusion, we suppose that WIN55212-2-induced signals interferes with cell-cycle-arrest- signaling in differentiating myelocytic cells and thus inhibits macrophageal differentiation. Thus, it is possible that the cannabinoid system is able to influence one of the key steps in the immune effector function, the monocytic-macrophageal differentiation by alteration of cell cycle control proteins cdc2 and p21, and is therefore representing a promising option for therapeutic intervention in exacerbated immune reactions. © 2011 Paulsen et al; licensee BioMed Central Ltd.
Description: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Sponsor: The study was supported by the Deutsche Forschungsgemeinschaft DFG (FOR 521/TP10).
Version: Published
DOI: 10.1186/1478-811X-9-33
URI: https://dspace.lboro.ac.uk/2134/16431
Publisher Link: http://dx.doi.org/10.1186/1478-811X-9-33
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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