The existence of a complex hormonal balance among glucocorticoids, androgens and estrogens involved in the regulation of Receptor for Activated C Kinase 1 (RACK1) expression and its related immune cells activation, highlights the possibility to employ this protein as screening tool for the evaluation of the immunotoxic profile of endocrine disrupting chemicals (EDCs), hormone-active substances capable of interfering with the physiologic hormonal signaling. Hence, the aim of this work was to investigate the effect of the exposure of EDCS 17α-ethynylestradiol (EE), diethyl phthalate (DEP) and perfluorooctanesulfonic acid (PFOS) on RACK1 expression and on lipopolysaccharide (LPS)-induced activation of the human monocytic cell line THP-1, a validated model for this investigation. In line with our previous results with estrogen-active compounds, EE treatment significantly induced RACK1 promoter transcriptional activity, mRNA expression, and protein levels, which paralleled an increase in LPS-induced IL-8, TNF-α production and CD86 expression, previously demonstrated to be dependent on RACK1/PKCβ activation. EE mediates its effect on RACK1 expression through G-protein-coupled estrogen receptor (GPER) and androgen receptor (AR) ligand-independent cascade, as also suggested by in silico molecular docking simulation. Conversely, DEP and PFOS induced a dose-dependent downregulation of RACK1 promoter transcriptional activity, mRNA expression, and protein levels, which was mirrored by a reduction of IL-8, TNF-α production and CD86 expression. Mifepristone pre-treatments abolish DEP and PFOS effects, confirming their GR agonist profile, also corroborated by molecular docking. Altogether, our data confirm that RACK1 represents an interesting target of steroid active compounds, which expression offers the opportunity to screen the immunotoxic potential of different hormone-active substances of concerns due to their human exposure and environmental persistence.

Effects of endocrine disrupting chemicals on the expression of RACK1 and LPS-induced THP-1 cell activation / M. Masi, A. Maddalon, M. Iulini, P. Linciano, V. Galbiati, M. Marinovich, M. Racchi, E. Corsini, E. Buoso. - In: TOXICOLOGY. - ISSN 0300-483X. - 480:(2022 Oct), pp. 153321.1-153321.16. [10.1016/j.tox.2022.153321]

Effects of endocrine disrupting chemicals on the expression of RACK1 and LPS-induced THP-1 cell activation

A. Maddalon
Co-primo
;
M. Iulini;V. Galbiati;M. Marinovich;E. Corsini
Penultimo
;
2022

Abstract

The existence of a complex hormonal balance among glucocorticoids, androgens and estrogens involved in the regulation of Receptor for Activated C Kinase 1 (RACK1) expression and its related immune cells activation, highlights the possibility to employ this protein as screening tool for the evaluation of the immunotoxic profile of endocrine disrupting chemicals (EDCs), hormone-active substances capable of interfering with the physiologic hormonal signaling. Hence, the aim of this work was to investigate the effect of the exposure of EDCS 17α-ethynylestradiol (EE), diethyl phthalate (DEP) and perfluorooctanesulfonic acid (PFOS) on RACK1 expression and on lipopolysaccharide (LPS)-induced activation of the human monocytic cell line THP-1, a validated model for this investigation. In line with our previous results with estrogen-active compounds, EE treatment significantly induced RACK1 promoter transcriptional activity, mRNA expression, and protein levels, which paralleled an increase in LPS-induced IL-8, TNF-α production and CD86 expression, previously demonstrated to be dependent on RACK1/PKCβ activation. EE mediates its effect on RACK1 expression through G-protein-coupled estrogen receptor (GPER) and androgen receptor (AR) ligand-independent cascade, as also suggested by in silico molecular docking simulation. Conversely, DEP and PFOS induced a dose-dependent downregulation of RACK1 promoter transcriptional activity, mRNA expression, and protein levels, which was mirrored by a reduction of IL-8, TNF-α production and CD86 expression. Mifepristone pre-treatments abolish DEP and PFOS effects, confirming their GR agonist profile, also corroborated by molecular docking. Altogether, our data confirm that RACK1 represents an interesting target of steroid active compounds, which expression offers the opportunity to screen the immunotoxic potential of different hormone-active substances of concerns due to their human exposure and environmental persistence.
Diethyl phthalate (DEP); Endocrine disrupting chemicals (EDCs); Ethynylestradiol (EE); Immunotoxicity; Perfluorooctanesulfonic acid (PFOS); RACK1; Alkanesulfonic Acids; Androgens; Estrogens; Fluorocarbons; GTP-Binding Proteins; Glucocorticoids; Humans; Interleukin-8; Ligands; Lipopolysaccharides; Mifepristone; Molecular Docking Simulation; Neoplasm Proteins; RNA, Messenger; Receptors for Activated C Kinase; Receptors, Androgen; Receptors, Estrogen; THP-1 Cells; Tumor Necrosis Factor-alpha; Endocrine Disruptors
Settore BIO/14 - Farmacologia
PRIN201719ECORS_01 - ENDOCRINE DISRUPTORS: INVESTIGATION OF THE EFFECTS ON THE IMMUNE AND NERVOUS SYSTEMS (EDoNIS) - CORSINI, EMANUELA - PRIN2017 - PRIN bando 2017 - 2019
PRIN202022EMARC_01 - New interventional approaches on multiple inflammatory pathways involved in regeneration after trauma and aging- associated diseases - MARCELLO, ELENA - PRIN2020 - PRIN bando 2020 - 2022
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/947295
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