Senescent thyrocytes and thyroid tumor cells induce M2-like macrophage polarization of human monocytes via a PGE2-dependent mechanism.

Autor: Mazzoni M; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy., Mauro G; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy., Erreni M; Department of Immunology, IRCCS Humanitas Clinical and Research Center, Via Manzoni, 56, 20089, Rozzano, Milan, Italy. marco.erreni@humanitasresearch.it., Romeo P; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy., Minna E; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy., Vizioli MG; Beatson Institute for Cancer Research, Bearsden, Glasgow, UK.; Institute of Cancer Sciences College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G61 1BD, UK., Belgiovine C; Department of Immunology, IRCCS Humanitas Clinical and Research Center, Via Manzoni, 56, 20089, Rozzano, Milan, Italy., Rizzetti MG; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy., Pagliardini S; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy., Avigni R; Department of Immunology, IRCCS Humanitas Clinical and Research Center, Via Manzoni, 56, 20089, Rozzano, Milan, Italy., Anania MC; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy., Allavena P; Department of Immunology, IRCCS Humanitas Clinical and Research Center, Via Manzoni, 56, 20089, Rozzano, Milan, Italy., Borrello MG; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy., Greco A; Molecular Mechanisms Unit, Department of Research, Fondazione IRCCS Istituto Nazionale dei Tumori, Via G.A. Amadeo, 42, 20133, Milan, Italy. angela.greco@istitutotumori.mi.it.
Jazyk: angličtina
Zdroj: Journal of experimental & clinical cancer research : CR [J Exp Clin Cancer Res] 2019 May 21; Vol. 38 (1), pp. 208. Date of Electronic Publication: 2019 May 21.
DOI: 10.1186/s13046-019-1198-8
Abstrakt: Background: Thyroid carcinoma includes several variants characterized by different biological and clinical features: from indolent microcarcinoma to undifferentiated and aggressive anaplastic carcinoma. Inflammation plays a critical role in thyroid tumors. Conditions predisposing to cancer, as well as oncogene activity, contribute to the construction of an inflammatory microenvironment that facilitates thyroid tumor progression. Moreover, oncogene-induced senescence, a mechanism tightly connected with inflammation, and able to restrain or promote cancer progression, is involved in thyroid cancer. The interactions between thyroid tumor cells and the microenvironment are not completely clarified.
Methods: We characterize in vitro the interplay between macrophages and senescent thyrocytes and tumor-derived cell lines, modeling early and late thyroid tumor stages, respectively. Purified peripheral blood-derived human monocytes were exposed to thyroid cell-derived conditioned medium (CM) and assessed for phenotype by flow cytometry. The factors secreted by thyroid cells and macrophages were identified by gene expression analysis and ELISA. The protumoral effect of macrophages was assessed by wound healing assay on K1 thyroid tumor cells. The expression of PTGS2 and M2 markers in thyroid tumors was investigated in publicly available datasets.
Results: Human monocytes exposed to CM from senescent thyrocytes and thyroid tumor cell lines undergo M2-like polarization, showing high CD206 and low MHC II markers, and upregulation of CCL17 secretion. The obtained M2-like macrophages displayed tumor-promoting activity. Among genes overexpressed in polarizing cells, we identified the prostaglandin-endoperoxide synthase enzyme (PTGS2/COX-2), which is involved in the production of prostaglandin E2 (PGE2). By using COX-2 inhibitors we demonstrated that the M2-like polarization ability of thyroid cells is related to the production of PGE2. Co-expression of PTGS2 and M2 markers is observed a significant fraction of human thyroid tumors.
Conclusions: Our results demonstrate that both senescent thyrocytes and thyroid tumor cell lines trigger M2-like macrophage polarization that is related to PGE2 secretion. This suggests that the interaction with the microenvironment occurs at both early and late thyroid tumor stages, and favors tumor progression. The co-expression of PTGS2 gene and M2 markers in human thyroid carcinoma highlights the possibility to counteract tumor growth through COX-2 inhibition.
Databáze: MEDLINE
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