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Courbet A, Bec N, Constant C, Larroque C, Pugniere M, El Messaoudi S, Zghaib Z, Khier S, Deleuze-Masquefa C, Gattacceca F. Imidazoquinoxaline anticancer derivatives and imiquimod interact with tubulin: Characterization of molecular microtubule inhibiting mechanisms in correlation with cytotoxicity. PLoS One 2017; 12:e0182022. [PMID: 28797090 PMCID: PMC5552358 DOI: 10.1371/journal.pone.0182022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 07/11/2017] [Indexed: 11/19/2022] Open
Abstract
Displaying a strong antiproliferative activity on a wide variety of cancer cells, EAPB0203 and EAPB0503 belong to the imidazo[1,2-a]quinoxalines family of imiquimod structural analogues. EAPB0503 has been shown to inhibit tubulin polymerization. The aim of the present study is to characterize the interaction of EAPB0203 and EAPB0503 with tubulin. We combine experimental approaches at the cellular and the molecular level both in vitro and in silico in order to evaluate the interaction of EAPB0203 and EAPB0503 with tubulin. We examine the influence of EAPB0203 and EAPB0503 on the cell cycle and fate, explore the binding interaction with purified tubulin, and use a computational molecular docking model to determine the binding modes to the microtubule. We then use a drug combination study with other anti-microtubule agents to compare the binding site of EAPB0203 and EAPB0503 to known potent tubulin inhibitors. We demonstrate that EAPB0203 and EAPB0503 are capable of blocking human melanoma cells in G2 and M phases and inducing cell death and apoptosis. Second, we show that EAPB0203 and EAPB0503, but also unexpectedly imiquimod, bind directly to purified tubulin and inhibit tubulin polymerization. As suggested by molecular docking and binding competition studies, we identify the colchicine binding site on β-tubulin as the interaction pocket. Furthermore, we find that EAPB0203, EAPB0503 and imiquimod display antagonistic cytotoxic effect when combined with colchicine, and disrupt tubulin network in human melanoma cells. We conclude that EAPB0203, EAPB0503, as well as imiquimod, interact with tubulin through the colchicine binding site, and that the cytotoxic activity of EAPB0203, EAPB0503 and imiquimod is correlated to their tubulin inhibiting effect. These compounds appear as interesting anticancer drug candidates as suggested by their activity and mechanism of action, and deserve further investigation for their use in the clinic.
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Affiliation(s)
- Alexis Courbet
- University of Montpellier, Montpellier, France
- Department of Biochemistry & Institute for Protein Design, University of Washington, Seattle, WA, United States of America
| | - Nicole Bec
- University of Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier INSERM U1194, Montpellier, France
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Caroline Constant
- IRCM, Institut de Recherche en Cancérologie de Montpellier INSERM U1194, Montpellier, France
| | - Christian Larroque
- University of Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier INSERM U1194, Montpellier, France
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Martine Pugniere
- University of Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier INSERM U1194, Montpellier, France
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Safia El Messaoudi
- University of Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier INSERM U1194, Montpellier, France
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Zahraa Zghaib
- IBMM, Institut des Biomolécules Max Mousseron, UMR 5247, Université de Montpellier, Montpellier, France
| | - Sonia Khier
- University of Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier INSERM U1194, Montpellier, France
- Institut Régional du Cancer de Montpellier, Montpellier, France
| | - Carine Deleuze-Masquefa
- IBMM, Institut des Biomolécules Max Mousseron, UMR 5247, Université de Montpellier, Montpellier, France
| | - Florence Gattacceca
- University of Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
- IRCM, Institut de Recherche en Cancérologie de Montpellier INSERM U1194, Montpellier, France
- Institut Régional du Cancer de Montpellier, Montpellier, France
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Griet M, Zelaya H, Mateos MV, Salva S, Juarez GE, de Valdez GF, Villena J, Salvador GA, Rodriguez AV. Soluble factors from Lactobacillus reuteri CRL1098 have anti-inflammatory effects in acute lung injury induced by lipopolysaccharide in mice. PLoS One 2014; 9:e110027. [PMID: 25329163 PMCID: PMC4201513 DOI: 10.1371/journal.pone.0110027] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 09/09/2014] [Indexed: 12/12/2022] Open
Abstract
We have previously demonstrated that Lactobacillus reuteri CRL1098 soluble factors were able to reduce TNF-α production by human peripheral blood mononuclear cells. The aims of this study were to determine whether L. reuteri CRL1098 soluble factors were able to modulate in vitro the inflammatory response triggered by LPS in murine macrophages, to gain insight into the molecular mechanisms involved in the immunoregulatory effect, and to evaluate in vivo its capacity to exert anti-inflammatory actions in acute lung injury induced by LPS in mice. In vitro assays demonstrated that L. reuteri CRL1098 soluble factors significantly reduced the production of pro-inflammatory mediators (NO, COX-2, and Hsp70) and pro-inflammatory cytokines (TNF-α, and IL-6) caused by the stimulation of macrophages with LPS. NF-kB and PI3K inhibition by L. reuteri CRL1098 soluble factors contributed to these inhibitory effects. Inhibition of PI3K/Akt pathway and the diminished expression of CD14 could be involved in the immunoregulatory effect. In addition, our in vivo data proved that the LPS-induced secretion of the pro-inflammatory cytokines, inflammatory cells recruitment to the airways and inflammatory lung tissue damage were reduced in L. reuteri CRL1098 soluble factors treated mice, providing a new way to reduce excessive pulmonary inflammation.
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Affiliation(s)
- Milagros Griet
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Tucumán, Argentina
| | - Hortensia Zelaya
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Tucumán, Argentina
| | - Melina Valeria Mateos
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Bahía Blanca, Buenos Aires, Argentina
| | - Susana Salva
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Tucumán, Argentina
| | - Guillermo Esteban Juarez
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Tucumán, Argentina
| | - Graciela Font de Valdez
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Tucumán, Argentina
| | - Julio Villena
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Tucumán, Argentina
| | | | - Ana Virginia Rodriguez
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán, Tucumán, Argentina
- * E-mail:
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Mechoud MA, Mateos MV, de Valdez GF, Villena J, Salvador GA, Rodriguez AV. Lactobacillus reuteri CRL1098 soluble factors modulate tumor necrosis factor alpha production in peripheral blood mononuclear cells: Involvement of lipid rafts. Int Immunopharmacol 2012; 14:446-53. [DOI: 10.1016/j.intimp.2012.08.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2012] [Revised: 08/06/2012] [Accepted: 08/30/2012] [Indexed: 02/06/2023]
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Hsia BJ, Ledford JG, Potts-Kant EN, Nikam VS, Lugogo NL, Foster WM, Kraft M, Abraham SN, Wright JR. Mast cell TNF receptors regulate responses to Mycoplasma pneumoniae in surfactant protein A (SP-A)-/- mice. J Allergy Clin Immunol 2012; 130:205-14.e2. [PMID: 22502799 PMCID: PMC3578696 DOI: 10.1016/j.jaci.2012.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 02/21/2012] [Accepted: 03/01/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND Mycoplasma pneumoniae (Mp) frequently colonizes the airways of patients with chronic asthma and likely contributes to asthma exacerbations. We previously reported that mice lacking surfactant protein A (SP-A) have increased airway hyperresponsiveness (AHR) during M pneumoniae infection versus wild-type mice mediated by TNF-α. Mast cells (MCs) have been implicated in AHR in asthma models and produce and respond to TNF-α. OBJECTIVE Determine the contribution of MC/TNF interactions to AHR in airways lacking functional SP-A during Mp infection. METHODS Bronchoalveolar lavage fluid was collected from healthy and asthmatic subjects to examine TNF-α levels and M pneumoniae positivity. To determine how SP-A interactions with MCs regulate airway homeostasis, we generated mice lacking both SP-A and MCs (SP-A(-/-)Kit(W-sh/W-sh)) and infected them with M pneumoniae. RESULTS Our findings indicate that high TNF-α levels correlate with M pneumoniae positivity in human asthmatic patients and that human SP-A inhibits M pneumoniae-stimulated transcription and release of TNF-α by MCs, implicating a protective role for SP-A. MC numbers increase in M pneumoniae-infected lungs, and airway reactivity is dramatically attenuated when MCs are absent. Using SP-A(-/-)Kit(W-sh/W-sh) mice engrafted with TNF-α(-/-) or TNF receptor (TNF-R)(-/-) MCs, we found that TNF-α activation of MCs through the TNF-R, but not MC-derived TNF-α, leads to augmented AHR during M pneumoniae infection when SP-A is absent. Additionally, M pneumoniae-infected SP-A(-/-)Kit(W-sh/W-sh) mice engrafted with TNF-α(-/-) or TNF-R(-/-) MCs have decreased mucus production compared with that seen in mice engrafted with wild-type MCs, whereas burden was unaffected. CONCLUSION Our data highlight a previously unappreciated but vital role for MCs as secondary responders to TNF-α during the host response to pathogen infection.
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Affiliation(s)
- Bethany J Hsia
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA
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Khier S, Gattacceca F, El Messaoudi S, Lafaille F, Deleuze-Masquéfa C, Bompart J, Cooper JF, Solassol I, Pinguet F, Bonnet PA, Bressolle FMM. Metabolism and Pharmacokinetics of EAPB0203 and EAPB0503, Two Imidazoquinoxaline Compounds Previously Shown to Have Antitumoral Activity on Melanoma and T-Lymphomas. Drug Metab Dispos 2010; 38:1836-47. [DOI: 10.1124/dmd.110.034579] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Khier S, Deleuze-Masquéfa C, Moarbess G, Gattacceca F, Margout D, Solassol I, Cooper JF, Pinguet F, Bonnet PA, Bressolle FM. Pharmacology of EAPB0203, a novel imidazo[1,2-a]quinoxaline derivative with anti-tumoral activity on melanoma. Eur J Pharm Sci 2010; 39:23-9. [DOI: 10.1016/j.ejps.2009.10.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2009] [Revised: 09/30/2009] [Accepted: 10/13/2009] [Indexed: 10/20/2022]
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EAPB0203, a member of the imidazoquinoxaline family, inhibits growth and induces caspase-dependent apoptosis in T-cell lymphomas and HTLV-I-associated adult T-cell leukemia/lymphoma. Blood 2008; 111:3770-7. [PMID: 18218850 DOI: 10.1182/blood-2007-11-121913] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Imiquimod is an immune response modifier currently used as a topical treatment of genital warts, basal cell carcinoma, cutaneous metastasis of malignant melanoma, and vascular tumors. We developed more efficient killers from the same family of compounds that can induce apoptosis without the prominent pro-inflammatory response associated with imiquimod. Among these new products, tk;4EAPB0203, a member of the imidazo[1,2-a]quinoxalines, exhibits an important cytotoxic activity in vitro. HTLV-I-associated adult T-cell leukemia (ATL) and HTLV-I-negative peripheral T-cell lymphomas are associated with poor prognosis. Using potentially achievable concentrations of EAPB0203, we demonstrate inhibition of cell proliferation, G2/M cell- cycle arrest, and induction of apoptosis in HTLV-I-transformed and HTLV-I-negative malignant T cells and fresh ATL cells, whereas normal resting or activated T lymphocytes were resistant. EAPB0203 treatment significantly down-regulated the antiapoptotic proteins c-IAP-1 and Bcl-XL and resulted in a significant loss of mitochondrial membrane potential, cytoplasmic release of cytochrome c, and caspase-dependent apoptosis. Moreover, in HTLV-I-transformed cells only, EAPB0203 treatment stabilized p21 and p53 proteins but had no effect on NF-kappaB activation. These results support a potential therapeutic role for EAPB0203 in ATL and HTLV-I-negative T-cell lymphomas, either as a systemic or topical therapy for skin lesions.
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Castellani ML, Shaik YB, Perrella A, Frydas S, Simeonidou I, Salini V, Tetè S, Conti CM, Vecchiet J, Theoharides TC, Conti P, De Lutiis MA. Expression and secretion of CXCL8 (IL-8), release of tryptase and transcription of histidine decarboxylase mRNA by anti-IgE-activated human umbilical cord blood-derived cultured mast cells. Neuroimmunomodulation 2007; 14:97-104. [PMID: 17713357 DOI: 10.1159/000107425] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2007] [Accepted: 06/24/2007] [Indexed: 02/05/2023] Open
Abstract
Activation of cytokine receptors and alterations in cytokines are thought to play important roles in neuronal dysfunction and in the pathogenesis of the nervous system diseases. CXCL8 (IL-8) is a CXC chemokine with chemotactic and inflammatory properties. Chemokines control mast cell infiltration in several inflammatory diseases, including stress and neurological dysfunctions. Using isolated human umbilical cord blood-derived cultured mast cells (HUCMC) from hematopoietic stem cells CD34+, mast cells were immunologically activated with anti-IgE at concentrations of 1, 5, 10 and 20 microg/ml leading to the dose-dependent production of IL-8 (p < 0.05). The increase in IL-8 mRNA expression was also noted when the cells were treated with anti-IgE at 10 microg/ml for 6 h. Immunologically activated HUCMC provoked the generation of tryptase in a dose- and time-dependent manner. We also found increased histidine decarboxylase (HDC) expression in activated HUCMC after 6 h of incubation, a rate-limiting enzyme responsible for the generation of histamine from histidine. Taken together, these results confirm that anti-IgE-activated mast cells release inflammatory mediators including CXCL8, a CXC chemokine which regulates several biological effects of mast cells, e.g. chemoattraction, and possibly causes cell arrest.
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