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Cherradi S, Garambois V, Marines J, Andrade AF, Fauvre A, Morand O, Fargal M, Mancouri F, Ayrolles-Torro A, Vezzo-Vié N, Jarlier M, Loussaint G, Huvelle S, Joubert N, Mazard T, Gongora C, Pourquier P, Boissière-Michot F, Rio MD. Improving the response to oxaliplatin by targeting chemotherapy-induced CLDN1 in resistant metastatic colorectal cancer cells. Cell Biosci 2023; 13:72. [PMID: 37041570 PMCID: PMC10091849 DOI: 10.1186/s13578-023-01015-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 03/15/2023] [Indexed: 04/13/2023] Open
Abstract
BACKGROUND Tumor resistance is a frequent cause of therapy failure and remains a major challenge for the long-term management of colorectal cancer (CRC). The aim of this study was to determine the implication of the tight junctional protein claudin 1 (CLDN1) in the acquired resistance to chemotherapy. METHODS Immunohistochemistry was used to determine CLDN1 expression in post-chemotherapy liver metastases from 58 CRC patients. The effects of oxaliplatin on membrane CLDN1 expression were evaluated by flow cytometry, immunofluorescence and western blotting experiments in vitro and in vivo. Phosphoproteome analyses, proximity ligation and luciferase reporter assays were used to unravel the mechanism of CLDN1 induction. RNAseq experiments were performed on oxaliplatin-resistant cell lines to investigate the role of CLDN1 in chemoresistance. The "one-two punch" sequential combination of oxaliplatin followed by an anti-CLDN1 antibody-drug conjugate (ADC) was tested in both CRC cell lines and murine models. RESULTS We found a significant correlation between CLDN1 expression level and histologic response to chemotherapy, CLDN1 expression being the highest in resistant metastatic residual cells of patients showing minor responses. Moreover, in both murine xenograft model and CRC cell lines, CLDN1 expression was upregulated after exposure to conventional chemotherapies used in CRC treatment. CLDN1 overexpression was, at least in part, functionally related to the activation of the MAPKp38/GSK3β/Wnt/β-catenin pathway. Overexpression of CLDN1 was also observed in oxaliplatin-resistant CRC cell lines and was associated with resistance to apoptosis, suggesting an anti-apoptotic role for CLDN1. Finally, we demonstrated that the sequential treatment with oxaliplatin followed by an anti-CLDN1 ADC displayed a synergistic effect in vitro and in in vivo. CONCLUSION Our study identifies CLDN1 as a new biomarker of acquired resistance to chemotherapy in CRC patients and suggests that a "one-two punch" approach targeting chemotherapy-induced CLDN1 expression may represent a therapeutic opportunity to circumvent resistance and to improve the outcome of patients with advanced CRC.
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Affiliation(s)
- Sara Cherradi
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Véronique Garambois
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Johanna Marines
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Augusto Faria Andrade
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Alexandra Fauvre
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Olivia Morand
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Manon Fargal
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Ferial Mancouri
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Adeline Ayrolles-Torro
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Nadia Vezzo-Vié
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Marta Jarlier
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
- Biometry Department, ICM, Montpellier, France
| | - Gerald Loussaint
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Steve Huvelle
- GICC, Team IMT, University of Tours, Tours, 7501, F-37032, France
| | - Nicolas Joubert
- GICC, Team IMT, University of Tours, Tours, 7501, F-37032, France
| | - Thibault Mazard
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
- Department of Medical Oncology, ICM, Montpellier, France
| | - Céline Gongora
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Philippe Pourquier
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
| | - Florence Boissière-Michot
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France
- Translational Research Unit, ICM, Montpellier, France
| | - Maguy Del Rio
- Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université de Montpellier, Institut du Cancer de Montpellier, 208 rue des Apothicaires, Montpellier Cedex 5, F-34298, France.
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Friedlová N, Zavadil Kokáš F, Hupp TR, Vojtěšek B, Nekulová M. IFITM protein regulation and functions: Far beyond the fight against viruses. Front Immunol 2022; 13:1042368. [PMID: 36466909 PMCID: PMC9716219 DOI: 10.3389/fimmu.2022.1042368] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 10/27/2022] [Indexed: 07/30/2023] Open
Abstract
Interferons (IFNs) are important cytokines that regulate immune responses through the activation of hundreds of genes, including interferon-induced transmembrane proteins (IFITMs). This evolutionarily conserved protein family includes five functionally active homologs in humans. Despite the high sequence homology, IFITMs vary in expression, subcellular localization and function. The initially described adhesive and antiproliferative or pro-oncogenic functions of IFITM proteins were diluted by the discovery of their antiviral properties. The large set of viruses that is inhibited by these proteins is constantly expanding, as are the possible mechanisms of action. In addition to their beneficial antiviral effects, IFITM proteins are often upregulated in a broad spectrum of cancers. IFITM proteins have been linked to most hallmarks of cancer, including tumor cell proliferation, therapeutic resistance, angiogenesis, invasion, and metastasis. Recent studies have described the involvement of IFITM proteins in antitumor immunity. This review summarizes various levels of IFITM protein regulation and the physiological and pathological functions of these proteins, with an emphasis on tumorigenesis and antitumor immunity.
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Affiliation(s)
- Nela Friedlová
- Research Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czechia
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czechia
| | - Filip Zavadil Kokáš
- Research Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czechia
| | - Ted R. Hupp
- Research Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czechia
- Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Bořivoj Vojtěšek
- Research Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czechia
| | - Marta Nekulová
- Research Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Brno, Czechia
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Ozawa S, Miura T, Terashima J, Habano W. Cellular irinotecan resistance in colorectal cancer and overcoming irinotecan refractoriness through various combination trials including DNA methyltransferase inhibitors: a review. CANCER DRUG RESISTANCE (ALHAMBRA, CALIF.) 2022; 4:946-964. [PMID: 35582377 PMCID: PMC8992440 DOI: 10.20517/cdr.2021.82] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/27/2021] [Accepted: 10/26/2021] [Indexed: 12/28/2022]
Abstract
Treatment with pharmacological drugs for colorectal cancer (CRC) remains unsatisfactory. A major cause of failure in pharmacotherapy is the resistance of colon cancer cells to the drugs, creating an urgent issue. In this review, we summarize previous studies on the resistance of CRC cells to irinotecan and discuss possible reasons for refractoriness. Our review presents the following five major causes of irinotecan resistance in human CRC: (1) cellular irinotecan resistance is induced mainly through the increased expression of the drug efflux transporter, ABCG2; (2) cellular irinotecan resistance is also induced in association with a nuclear receptor, pregnane/steroid X receptor (PXR/SXR), which is enriched in the CYP3A4 gene enhancer region in CRC cells by exposing the cells to SN-38; (3) irinotecan-resistant cells possess either reduced DNA topoisomerase I (Top1) expression at both the mRNA and protein levels or Top1 missense mutations; (4) alterations in the tumor microenvironment lead to drug resistance through intercellular vesicle-mediated transmission of miRNAs; and (5) CRC stem cells are the most difficult targets to successfully treat CRC. In the clinical setting, CRC gradually develops resistance to initially effective irinotecan-based therapy. To solve this problem, several clinical trials, such as irinotecan plus cetuximab vs. cetuximab monotherapy, have been conducted. Another clinical trial on irinotecan plus guadecitabine, a DNA-methyltransferase inhibitor, has also been conducted.
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Affiliation(s)
- Shogo Ozawa
- Division of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Toshitaka Miura
- Division of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Jun Terashima
- Division of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Wataru Habano
- Division of Pharmacodynamics and Molecular Genetics, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
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Zhang D, Yu Z, Zhao W, Liu J. Assessment of the anti-tumor activity of cyanidin-3-O-arabinoside from apple against APN, JAK, and EZH2 target proteins. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Detilleux D, Raynaud P, Pradet-Balade B, Helmlinger D. The TRRAP transcription cofactor represses interferon-stimulated genes in colorectal cancer cells. eLife 2022; 11:69705. [PMID: 35244540 PMCID: PMC8926402 DOI: 10.7554/elife.69705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 03/03/2022] [Indexed: 11/30/2022] Open
Abstract
Transcription is essential for cells to respond to signaling cues and involves factors with multiple distinct activities. One such factor, TRRAP, functions as part of two large complexes, SAGA and TIP60, which have crucial roles during transcription activation. Structurally, TRRAP belongs to the phosphoinositide 3 kinase-related kinases (PIKK) family but is the only member classified as a pseudokinase. Recent studies established that a dedicated HSP90 co-chaperone, the triple T (TTT) complex, is essential for PIKK stabilization and activity. Here, using endogenous auxin-inducible degron alleles, we show that the TTT subunit TELO2 promotes TRRAP assembly into SAGA and TIP60 in human colorectal cancer cells (CRCs). Transcriptomic analysis revealed that TELO2 contributes to TRRAP regulatory roles in CRC cells, most notably of MYC target genes. Surprisingly, TELO2 and TRRAP depletion also induced the expression of type I interferon genes. Using a combination of nascent RNA, antibody-targeted chromatin profiling (CUT&RUN), ChIP, and kinetic analyses, we propose a model by which TRRAP directly represses the transcription of IRF9, which encodes a master regulator of interferon-stimulated genes. We have therefore uncovered an unexpected transcriptional repressor role for TRRAP, which we propose contributes to its tumorigenic activity.
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Affiliation(s)
| | - Peggy Raynaud
- CRBM, University of Montpellier, CNRS, Montpellier, France
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Pajic-Lijakovic I, Milivojevic M. Mechanical waves caused by collective cell migration: generation. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2022; 51:1-13. [PMID: 35072747 DOI: 10.1007/s00249-021-01581-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 06/30/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Long-timescale viscoelasticity caused by collective cell migration (CCM) significantly influences cell rearrangement and induces generation of mechanical waves. The phenomenon represents a product of the active turbulence occurring at low Reynolds number. The generation of mechanical waves has been a subject of intensive research primarily in 2D multicellular systems, while 3D systems have not been considered in this context. The aim of this contribution is to discuss the generation of mechanical waves during 3D CCM in two model systems: (1) the fusion of two-cell aggregates and (2) cell aggregate rounding after uni-axial compression, pointing out that mechanical waves represent a characteristic of CCM in general. Such perturbations are also involved in various biological processes, such as embryogenesis, wound healing and cancer invasion. The inter-relation between the viscoelasticity and the appearance of active turbulence remains poorly understood even in 2D. The phenomenon represents a consequence of the competition between the viscoelastic force and the surface tension force which induces successive stiffening and softening of parts of multicellular systems. The viscoelastic force is a product of the residual cell stress accumulation and its inhomogeneous distribution caused by CCM. This modeling consideration represents a powerful tool to address the generation of mechanical waves in CCM towards an understanding of this important but still controversial topic.
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Affiliation(s)
| | - Milan Milivojevic
- Faculty of Technology and Metallurgy, Belgrade University, Belgrade, Serbia
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Caro D, Rivera D, Ocampo Y, Müller K, Franco LA. A promising naphthoquinone [8-hydroxy-2-(2-thienylcarbonyl)naphtho[2,3-b]thiophene-4,9-dione] exerts anti-colorectal cancer activity through ferroptosis and inhibition of MAPK signaling pathway based on RNA sequencing. OPEN CHEM 2020. [DOI: 10.1515/chem-2020-0170] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
AbstractNaphthoquinones are naturally occurring metabolites with recognized anti-cancer potential but limited clinical application. This study investigated the molecular mechanism of 8-hydroxy-2-(2-thenoyl)naphtho[2,3-b]thiophene-4,9-dione (1), a new candidate for colorectal cancer (CRC) treatment, using different experimental settings: MTT, clonogenic, wound healing, and cell cycle assays; as well as RNA sequencing. Naphthoquinone 1 selectively reduced the viability and migration of HT-29 cells by G2/M arrest and changes in their transcriptome signature with significant effect on cellular survival, proliferation, angiogenesis, response to interferon, oxidative stress, and immune response. Impact analysis identified ferroptosis and MAPK pathways as significantly affected. In summary, our results suggest that 1 induces the selective death of CRC cells by inducing oxidative stress, ferroptosis, and MAPK inhibition.
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Affiliation(s)
- Daneiva Caro
- Biological Evaluation of Promising Substances Group, Department of Pharmaceutical Sciences, University of Cartagena, Carrera 50 No. 29-11, Cartagena, 130014, Colombia
| | - David Rivera
- Biological Evaluation of Promising Substances Group, Department of Pharmaceutical Sciences, University of Cartagena, Carrera 50 No. 29-11, Cartagena, 130014, Colombia
| | - Yanet Ocampo
- Biological Evaluation of Promising Substances Group, Department of Pharmaceutical Sciences, University of Cartagena, Carrera 50 No. 29-11, Cartagena, 130014, Colombia
| | - Klaus Müller
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus, Westphalian Wilhelms University, Corrensstraße 48, D-48149, Münster, Germany
| | - Luis A. Franco
- Biological Evaluation of Promising Substances Group, Department of Pharmaceutical Sciences, University of Cartagena, Carrera 50 No. 29-11, Cartagena, 130014, Colombia
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Narayan V, Jaiswal J, Sugur H, Sd S, Rao S, Chatterjee A, Gowda H, A A, Somanna S, Santosh V. Proteomic profiling of medulloblastoma reveals novel proteins differentially expressed within each molecular subgroup. Clin Neurol Neurosurg 2020; 196:106028. [PMID: 32580068 DOI: 10.1016/j.clineuro.2020.106028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/15/2020] [Accepted: 06/14/2020] [Indexed: 01/12/2023]
Abstract
OBJECTIVES The objective of the study was to identify novel medulloblastoma (MB) biomarkers through proteomic profiling, correlate it with the molecular subgroups of MB and assess the clinical significance. METHODS Archived paraffin embedded tumor tissue blocks from 118 MB patients, operated at our institute were retrieved. Clinical information was documented from the hospital database. Tumours were stratified into molecular subgroups using the IHC markers- β Catenin, GAB-1, YAP-1 and p53. Six fresh MB tumour tissues and two control cerebellar tissues were subjected to proteomic profiling to study differential protein expression in molecular subgroups using high resolution mass spectrometry. Prominent signalling pathways activated in each subgroup were identified using the Panther pathway software. RESULTS Non WNT/SHH group was the most common (61.1 %), followed by SHH and WNT. p53 immunopositivity did not correlate with prognosis in any subgroup. Proteomic profiling revealed several novel proteins differentially expressed between MB molecular subgroups. Signalling pathways exclusively enriched in each molecular subgroup were also identified. The top upregulated proteins were PMEL and FBN2 in the WNT subgroup, SYNGR2 in the SHH subgroup and GFAP, IMPG2 and MAGEA10 in the Non WNT/Non SHH group. We validated GFAP by immunohistochemistry on the archived samples (n = 118) and noted two types of staining pattern in MBs - reactive (stellate) astrocytes and tumour cell staining. GFAP immunopositivity in tumor cells of SHH subgroup correlated with a better prognosis. CONCLUSIONS Proteomic profile identified several novel proteins differentially regulated within the molecular subgroups that could serve as potential diagnostic /prognostic biomarkers. Notably, GFAP, which was derived from proteomics data, when validated by IHC, revealed a variable staining pattern in MB tumours. The prognostic significance of GFAP in SHH tumor patients further points at the heterogeneity of this subgroup. The study also throws light on the signaling pathways activated in MB and in turn its plausible role in the tumorigenesis.
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Affiliation(s)
- Vinayak Narayan
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences [NIMHANS], Bangalore, India
| | - Janhvi Jaiswal
- Department of Neuropathology, National Institute of Mental Health and Neurosciences [NIMHANS], Bangalore, India
| | - Harsha Sugur
- Department of Neuropathology, National Institute of Mental Health and Neurosciences [NIMHANS], Bangalore, India
| | - Shwetha Sd
- Department of Neuropathology, National Institute of Mental Health and Neurosciences [NIMHANS], Bangalore, India
| | - Shilpa Rao
- Department of Neuropathology, National Institute of Mental Health and Neurosciences [NIMHANS], Bangalore, India
| | | | | | - Arivazhagan A
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences [NIMHANS], Bangalore, India
| | - Sampath Somanna
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences [NIMHANS], Bangalore, India
| | - Vani Santosh
- Department of Neuropathology, National Institute of Mental Health and Neurosciences [NIMHANS], Bangalore, India.
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Jiang Z, Zhang Z, Cui G, Sun Z, Song G, Liu Y, Zhong G. DNA Topoisomerase 1 Structure-BASED Design, Synthesis, Activity Evaluation and Molecular Simulations Study of New 7-Amide Camptothecin Derivatives Against Spodoptera frugiperda. Front Chem 2018; 6:456. [PMID: 30345269 PMCID: PMC6182061 DOI: 10.3389/fchem.2018.00456] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 09/13/2018] [Indexed: 02/04/2023] Open
Abstract
Camptothecin and its derivatives (CPTs) have strong toxicity to eukaryotic cells by targeting their DNA topoisomerase 1 (Top1) protein and have been increasingly explored as potential pesticides for plant protection. However, the detailed structure-binding mechanism of the interactions between CPTs and the insect Top1 protein remains unclear, which significantly hinders the development of novel CPTs as new insecticides. Herein, a series of 7-amide camptothecin analogs based on the binding mode of camptothecin in complex with Top1 (Sf Top1)-DNA from Spodoptera frugiperda cultured cell line Sf9 were designed and synthesized. Fifteen of these compounds exhibited excellent cytotoxic activity (values of IC50 from 2.01 to 6.78 μM) compared with camptothecin (29.47 μM). The molecular simulations revealed the binding mechanism when the camptothecin parent rings were inserting parallel to DNA bases and stabling the ternary complex by π-π stacked and hydrogen-bond interactions, and further suggested that introduction of lipophilic and some electron-withdrawing groups on the amide linkage of camptothecin could be beneficial to its activity via some non-covalent interactions. Furthermore, almost all the synthesized compounds could inhibit the growth of Spodoptera litura larvae strongly (Inhibition rate from 50.20 to 79.05%), superior or comparable to camptothecin (55.69%) after 8 days of exposure. In particular, the compounds 4c, 4d, 4f, and 4j, which presented more than 70% inhibitory activities, were deserved to be developed as potential biorational pesticides. The information described here would be useful for the further design and development of potentially effective pesticides in the field of plant protection.
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Affiliation(s)
- Zhiyan Jiang
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, and Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Zhijun Zhang
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, and Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Gaofeng Cui
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, and Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Zhipeng Sun
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, and Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Gaopeng Song
- College of Materials and Energy, South China Agricultural University, Guangzhou, China
| | - Yingqian Liu
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Guohua Zhong
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, and Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, College of Agriculture, South China Agricultural University, Guangzhou, China
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FOXO3a and the MAPK p38 are activated by cetuximab to induce cell death and inhibit cell proliferation and their expression predicts cetuximab efficacy in colorectal cancer. Br J Cancer 2016; 115:1223-1233. [PMID: 27685445 PMCID: PMC5104890 DOI: 10.1038/bjc.2016.313] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/08/2016] [Accepted: 09/06/2016] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Cetuximab, a monoclonal antibody against EGFR used for the treatment of colorectal cancer (CRC), is ineffective in many patients. The aim of this study was to identify the signalling pathways activated by cetuximab in CRC cells and define new biomarker of response. METHODS We used in vitro, in vivo models and clinical CRC samples to assess the role of p38 and FOXO3a in cetuximab mechanism of action. RESULTS We show that cetuximab activates the MAPK p38. Specifically, p38 inhibition reduced cetuximab efficacy on cell growth and cell death. At the molecular level, cetuximab activates the transcription factor FOXO3a and promotes its nuclear translocation via p38-mediated phosphorylation, leading to the upregulation of its target genes p27 and BIM and the subsequent induction of apoptosis and inhibition of cell proliferation. Finally, we found that high FOXO3a and p38 expression levels are associated with better response rate and improved outcome in cetuximab-treated patients with CRC harbouring WT KRAS. CONCLUSIONS We identify FOXO3a as a key mediator of cetuximab mechanism of action in CRC cells and define p38 as its activator in this context. Moreover, high FOXO3a and p38 expression could predict the response to cetuximab in patients with CRC harbouring WT KRAS.
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Ogony J, Choi HJ, Lui A, Cristofanilli M, Lewis-Wambi J. Interferon-induced transmembrane protein 1 (IFITM1) overexpression enhances the aggressive phenotype of SUM149 inflammatory breast cancer cells in a signal transducer and activator of transcription 2 (STAT2)-dependent manner. Breast Cancer Res 2016; 18:25. [PMID: 26897526 PMCID: PMC4761146 DOI: 10.1186/s13058-016-0683-7] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 02/03/2016] [Indexed: 12/31/2022] Open
Abstract
Background Inflammatory breast cancer (IBC) is a very aggressive and lethal subtype of breast cancer that accounts for about 4 % of all breast cancers diagnosed in the United States. Despite the efforts of several investigators to identify the molecular factors driving the aggressive phenotype of IBC, a great deal is still unknown about the molecular underpinnings of the disease. In the present study, we investigated the role of interferon-induced transmembrane protein 1 (IFITM1), a well-known interferon-stimulated gene (ISG), in promoting the aggressiveness of SUM149 IBC cells. Methods Western blot and real-time polymerase chain reaction analyses were performed to assess the protein and messenger RNA (mRNA) levels of IFITM1 and other ISGs in three IBC cell lines: SUM149, MDA-IBC-3, and SUM190. IFITM1 expression and cellular localization were assessed by using immunofluorescence, while the tumorigenic potential was assessed by performing cell migration, invasion, and colony formation assays. Small interfering RNA and short hairpin RNA knockdowns, enzyme-linked immunosorbent assays, and luciferase assays were performed to determine the functional significance of IFITM1 and signal transducers and activators of transcription 1 and 2 (STAT1/2) in SUM149 cells. Results We found that IFITM1 was constitutively overexpressed at the mRNA and protein levels in triple-negative SUM149 IBC cells, but that it was not expressed in SUM190 and MDA-IBC-3 IBC cells, and that suppression of IFITM1 or blockade of the IFNα signaling pathway significantly reduced the aggressive phenotype of SUM149 cells. Additionally, we found that knockdown of STAT2 abolished IFITM1 expression and IFITM1 promoter activity in SUM149 cells and that loss of STAT2 significantly inhibited the ability of SUM149 cells to proliferate, migrate, invade, and form 2-D colonies. Notably, we found that STAT2-mediated activation of IFITM1 was particularly dependent on the chromatin remodeler brahma-related gene 1 (BRG1), which was significantly elevated in SUM149 cells compared with SUM190 and MDA-IBC-3 cells. Conclusions These findings indicate that overexpression of IFITM1 enhances the aggressive phenotype of triple-negative SUM149 IBC cells and that this effect is dependent on STAT2/BRG1 interaction. Further studies are necessary to explore the potential of IFITM1 as a novel therapeutic target and prognostic marker for some subtypes of IBCs. Electronic supplementary material The online version of this article (doi:10.1186/s13058-016-0683-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Joshua Ogony
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, KS, USA.
| | - Hye Joung Choi
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, KS, USA.
| | - Asona Lui
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, KS, USA. .,Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA.
| | | | - Joan Lewis-Wambi
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, KS, USA.
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Phosphorylated retinoblastoma protein is a potential predictive marker of irinotecan efficacy for colorectal cancer. Int J Oncol 2016; 48:1297-304. [PMID: 26783196 DOI: 10.3892/ijo.2016.3332] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 12/15/2015] [Indexed: 11/05/2022] Open
Abstract
Irinotecan has been used in the first-line treatment of metastatic colorectal cancer. However, no clear predictive marker of irinotecan efficacy has been identified. It is controversial whether the response to irinotecan could be predicted by the expression level of topoisomerase-I, a direct target of irinotecan. The present study aimed to identify a feasible predictive marker of irinotecan efficacy. We hypothesized that the efficacy of SN38 (an active metabolite of irinotecan) is related to the cell proliferation and the phosphorylation status of RB in colorectal cancer cells. Indeed, the IC50 of SN38 was positively correlated with the doubling time of each cell line (R2=0.9315). Moreover, the phosphorylation level of RB was related to SN38 sensitivity. Consistent with the in vitro data, colorectal cancer tissues of irinotecan responders showed a significantly higher rate of phosphorylated RB (serine 780) expression using immunohistochemistry (P=0.0006), although a generally used proliferative marker, Ki-67, showed no significance. Finally, we investigated whether the phosphorylation of RB plays a crucial role in the efficacy of irinotecan. To suppress the expression of phosphorylated RB, we performed the knockdown of CDKs, which are known to phosphorylate RB. Intriguingly, the knockdown of both CDK4 and CDK6, but not CDK2, allowed RB to become the most hypophosphorylated form and converted the SN38-sensitive cells to a resistant state. Taking together the above findings from in vitro and clinical research, the immunohistochemistry of phosphorylated RB protein might be feasible to predict the irinotecan efficacy of colorectal cancer in clinical practice.
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Choi HJ, Lui A, Ogony J, Jan R, Sims PJ, Lewis-Wambi J. Targeting interferon response genes sensitizes aromatase inhibitor resistant breast cancer cells to estrogen-induced cell death. Breast Cancer Res 2015; 17:6. [PMID: 25588716 PMCID: PMC4336497 DOI: 10.1186/s13058-014-0506-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 12/15/2014] [Indexed: 01/21/2023] Open
Abstract
Introduction Estrogen deprivation using aromatase inhibitors (AIs) is currently the standard of care for postmenopausal women with hormone receptor-positive breast cancer. Unfortunately, the majority of patients treated with AIs eventually develop resistance, inevitably resulting in patient relapse and, ultimately, death. The mechanism by which resistance occurs is still not completely known, however, recent studies suggest that impaired/defective interferon signaling might play a role. In the present study, we assessed the functional role of IFITM1 and PLSCR1; two well-known interferon response genes in AI resistance. Methods Real-time PCR and Western blot analyses were used to assess mRNA and protein levels of IFITM1, PLSCR1, STAT1, STAT2, and IRF-7 in AI-resistant MCF-7:5C breast cancer cells and AI-sensitive MCF-7 and T47D cells. Immunohistochemistry (IHC) staining was performed on tissue microarrays consisting of normal breast tissues, primary breast tumors, and AI-resistant recurrence tumors. Enzyme-linked immunosorbent assay was used to quantitate intracellular IFNα level. Neutralizing antibody was used to block type 1 interferon receptor IFNAR1 signaling. Small interference RNA (siRNA) was used to knockdown IFITM1, PLSCR1, STAT1, STAT2, IRF-7, and IFNα expression. Results We found that IFITM1 and PLSCR1 were constitutively overexpressed in AI-resistant MCF-7:5C breast cancer cells and AI-resistant tumors and that siRNA knockdown of IFITM1 significantly inhibited the ability of the resistant cells to proliferate, migrate, and invade. Interestingly, suppression of IFITM1 significantly enhanced estradiol-induced cell death in AI-resistant MCF-7:5C cells and markedly increased expression of p21, Bax, and Noxa in these cells. Significantly elevated level of IFNα was detected in AI-resistant MCF-7:5C cells compared to parental MCF-7 cells and suppression of IFNα dramatically reduced IFITM1, PLSCR1, p-STAT1, and p-STAT2 expression in the resistant cells. Lastly, neutralizing antibody against IFNAR1/2 and knockdown of STAT1/STAT2 completely suppressed IFITM1, PLSCR1, p-STAT1, and p-STAT2 expression in the resistant cells, thus confirming the involvement of the canonical IFNα signaling pathway in driving the overexpression of IFITM1 and other interferon-stimulated genes (ISGs) in the resistant cells. Conclusion Overall, these results demonstrate that constitutive overexpression of ISGs enhances the progression of AI-resistant breast cancer and that suppression of IFITM1 and other ISGs sensitizes AI-resistant cells to estrogen-induced cell death. Electronic supplementary material The online version of this article (doi:10.1186/s13058-014-0506-7) contains supplementary material, which is available to authorized users.
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Kolosenko I, Fryknäs M, Forsberg S, Johnsson P, Cheon H, Holvey-Bates EG, Edsbäcker E, Pellegrini P, Rassoolzadeh H, Brnjic S, Larsson R, Stark GR, Grandér D, Linder S, Tamm KP, De Milito A. Cell crowding induces interferon regulatory factor 9, which confers resistance to chemotherapeutic drugs. Int J Cancer 2014; 136:E51-61. [PMID: 25156627 DOI: 10.1002/ijc.29161] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 07/25/2014] [Accepted: 08/14/2014] [Indexed: 11/07/2022]
Abstract
The mechanism of multicellular drug resistance, defined as the reduced efficacy of chemotherapeutic drugs in solid tumors is incompletely understood. Here we report that colon carcinoma cells cultured as 3D microtissues (spheroids) display dramatic increases in the expression of a subset of type I interferon-(IFN)-stimulated genes (ISGs). A similar gene signature was associated previously with resistance to radiation and chemotherapy, prompting us to examine the underlying biological mechanisms. Analysis of spheroids formed by different tumor cell lines and studies using knock-down of gene expression showed that cell crowding leads to the induction of IFN regulatory factor-9 (IRF9) which together with STAT2 and independently of IFNs, is necessary for ISG upregulation. Increased expression of IRF9 alone was sufficient to induce the ISG subset in monolayer cells and to confer increased resistance to clinically used cytotoxic drugs. Our data reveal a novel mechanism of regulation of a subset of ISGs, leading to drug resistance in solid tumors.
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Affiliation(s)
- Iryna Kolosenko
- Department of Oncology-Pathology, Cancer Center Karolinska, Karolinska Institutet, 17176, Stockholm, Sweden
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15
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IFNβ-dependent increases in STAT1, STAT2, and IRF9 mediate resistance to viruses and DNA damage. EMBO J 2013; 32:2751-63. [PMID: 24065129 PMCID: PMC3801437 DOI: 10.1038/emboj.2013.203] [Citation(s) in RCA: 241] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 08/13/2013] [Indexed: 12/18/2022] Open
Abstract
A single high dose of interferon-β (IFNβ) activates powerful cellular responses, in which many anti-viral, pro-apoptotic, and anti-proliferative proteins are highly expressed. Since some of these proteins are deleterious, cells downregulate this initial response rapidly. However, the expression of many anti-viral proteins that do no harm is sustained, prolonging a substantial part of the initial anti-viral response for days and also providing resistance to DNA damage. While the transcription factor ISGF3 (IRF9 and tyrosine-phosphorylated STATs 1 and 2) drives the first rapid response phase, the related factor un-phosphorylated ISGF3 (U-ISGF3), formed by IFNβ-induced high levels of IRF9 and STATs 1 and 2 without tyrosine phosphorylation, drives the second prolonged response. The U-ISGF3-induced anti-viral genes that show prolonged expression are driven by distinct IFN stimulated response elements (ISREs). Continuous exposure of cells to a low level of IFNβ, often seen in cancers, leads to steady-state increased expression of only the U-ISGF3-dependent proteins, with no sustained increase in other IFNβ-induced proteins, and to constitutive resistance to DNA damage. IFNβ induces the formation of a novel transcriptional complex, U-ISGF3, which contains un-phosphorylated STATs. U-ISGF3 regulates the expression of a subset of IFNβ-stimulated genes to promote resistance to virus infection and DNA damage.
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Sgorbissa A, Brancolini C. IFNs, ISGylation and cancer: Cui prodest? Cytokine Growth Factor Rev 2012; 23:307-14. [PMID: 22906767 DOI: 10.1016/j.cytogfr.2012.07.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 07/16/2012] [Accepted: 07/18/2012] [Indexed: 12/26/2022]
Abstract
IFNs are cytokines that segregate viral infections, modulate the immune responses and influence tumor cells survival. These options are under the control of ISGs (Interferon Stimulated Genes) which expression is propelled by IFNs. To the ISGs family belong all the components of the molecular machinery that modifies proteins by the addition of the ubiquitin-like protein ISG15, in a process known as ISGylation. Despite alterations in the components of this machinery are frequently observed in cancer, the contribution of ISG15 and of ISGylation to tumor growth and resistance to chemotherapy is unclear and debated. With the aim of elucidating this point, in this review we have discussed about recent data pointing to a dysregulation of the IFN signaling and the ISGylation system in cancer.
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Affiliation(s)
- Andrea Sgorbissa
- Dipartimento di Scienze Mediche e Biologiche and MATI Center of Excellence, Università degli Studi di Udine, Udine, Italy
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17
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Allen WL, Turkington RC, Stevenson L, Carson G, Coyle VM, Hector S, Dunne P, Van Schaeybroeck S, Longley DB, Johnston PG. Pharmacogenomic profiling and pathway analyses identify MAPK-dependent migration as an acute response to SN38 in p53 null and p53-mutant colorectal cancer cells. Mol Cancer Ther 2012; 11:1724-34. [PMID: 22665525 PMCID: PMC3428848 DOI: 10.1158/1535-7163.mct-12-0207] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The topoisomerase I inhibitor irinotecan is used to treat advanced colorectal cancer and has been shown to have p53-independent anticancer activity. The aim of this study was to identify the p53-independent signaling mechanisms activated by irinotecan. Transcriptional profiling of isogenic HCT116 p53 wild-type and p53 null cells was carried out following treatment with the active metabolite of irinotecan, SN38. Unsupervised analysis methods showed that p53 status had a highly significant impact on gene expression changes in response to SN38. Pathway analysis indicated that pathways involved in cell motility [adherens junction, focal adhesion, mitogen-activated protein kinase (MAPK), and regulation of the actin cytoskeleton] were significantly activated in p53 null cells, but not p53 wild-type cells, following SN38 treatment. In functional assays, SN38 treatment increased the migratory potential of p53 null and p53-mutant colorectal cancer cell lines, but not p53 wild-type lines. Moreover, p53 null SN38-resistant cells were found to migrate at a faster rate than parental drug-sensitive p53 null cells, whereas p53 wild-type SN38-resistant cells failed to migrate. Notably, cotreatment with inhibitors of the MAPK pathway inhibited the increased migration observed following SN38 treatment in p53 null and p53-mutant cells. Thus, in the absence of wild-type p53, SN38 promotes migration of colorectal cancer cells, and inhibiting MAPK blocks this potentially prometastatic adaptive response to this anticancer drug.
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Affiliation(s)
| | | | - Leanne Stevenson
- Drug Resistance Group, Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, N. Ireland
| | - Gail Carson
- Drug Resistance Group, Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, N. Ireland
| | - Vicky M. Coyle
- Drug Resistance Group, Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, N. Ireland
| | - Suzanne Hector
- Drug Resistance Group, Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, N. Ireland
| | - Philip Dunne
- Drug Resistance Group, Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, N. Ireland
| | - Sandra Van Schaeybroeck
- Drug Resistance Group, Centre for Cancer Research and Cell Biology, Queen’s University Belfast, Belfast, N. Ireland
| | | | - Patrick G. Johnston
- Corresponding Author: Patrick Johnston, Centre for Cancer Research and Cell Biology, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland. Tel: 44-2890-972764. Fax: 44-2890-263744.
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18
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Paillas S, Causse A, Marzi L, de Medina P, Poirot M, Denis V, Vezzio-Vie N, Espert L, Arzouk H, Coquelle A, Martineau P, Del Rio M, Pattingre S, Gongora C. MAPK14/p38α confers irinotecan resistance to TP53-defective cells by inducing survival autophagy. Autophagy 2012; 8:1098-112. [PMID: 22647487 DOI: 10.4161/auto.20268] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Recently we have shown that the mitogen-activated protein kinase (MAPK) MAPK14/p38α is involved in resistance of colon cancer cells to camptothecin-related drugs. Here we further investigated the cellular mechanisms involved in such drug resistance and showed that, in HCT116 human colorectal adenocarcinoma cells in which TP53 was genetically ablated (HCT116-TP53KO), overexpression of constitutively active MAPK14/p38α decreases cell sensitivity to SN-38 (the active metabolite of irinotecan), inhibits cell proliferation and induces survival-autophagy. Since autophagy is known to facilitate cancer cell resistance to chemotherapy and radiation treatment, we then investigated the relationship between MAPK14/p38α, autophagy and resistance to irinotecan. We demonstrated that induction of autophagy by SN38 is dependent on MAPK14/p38α activation. Finally, we showed that inhibition of MAPK14/p38α or autophagy both sensitizes HCT116-TP53KO cells to drug therapy. Our data proved that the two effects are interrelated, since the role of autophagy in drug resistance required the MAPK14/p38α. Our results highlight the existence of a new mechanism of resistance to camptothecin-related drugs: upon SN38 induction, MAPK14/p38α is activated and triggers survival-promoting autophagy to protect tumor cells against the cytotoxic effects of the drug. Colon cancer cells could thus be sensitized to drug therapy by inhibiting either MAPK14/p38 or autophagy.
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Affiliation(s)
- Salome Paillas
- Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
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19
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TAN YONG, PENG JINGJING, WEI DONG, CHEN PENG, ZHAO YU. Effect of Jagged1 on the proliferation and migration of colon cancer cells. Exp Ther Med 2012; 4:89-92. [DOI: 10.3892/etm.2012.549] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Accepted: 11/24/2011] [Indexed: 11/05/2022] Open
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20
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Mouliere F, Robert B, Arnau Peyrotte E, Del Rio M, Ychou M, Molina F, Gongora C, Thierry AR. High fragmentation characterizes tumour-derived circulating DNA. PLoS One 2011; 6:e23418. [PMID: 21909401 PMCID: PMC3167805 DOI: 10.1371/journal.pone.0023418] [Citation(s) in RCA: 376] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 07/16/2011] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Circulating DNA (ctDNA) is acknowledged as a potential diagnostic tool for various cancers including colorectal cancer, especially when considering the detection of mutations. Certainly due to lack of normalization of the experimental conditions, previous reports present many discrepancies and contradictory data on the analysis of the concentration of total ctDNA and on the proportion of tumour-derived ctDNA fragments. METHODOLOGY In order to rigorously analyse ctDNA, we thoroughly investigated ctDNA size distribution. We used a highly specific Q-PCR assay and athymic nude mice xenografted with SW620 or HT29 human colon cancer cells, and we correlated our results by examining plasma from metastatic CRC patients. CONCLUSION/SIGNIFICANCE Fragmentation and concentration of tumour-derived ctDNA is positively correlated with tumour weight. CtDNA quantification by Q-PCR depends on the amplified target length and is optimal for 60-100 bp fragments. Q-PCR analysis of plasma samples from xenografted mice and cancer patients showed that tumour-derived ctDNA exhibits a specific amount profile based on ctDNA size and significant higher ctDNA fragmentation. Metastatic colorectal patients (n = 12) showed nearly 5-fold higher mean ctDNA fragmentation than healthy individuals (n = 16).
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Affiliation(s)
- Florent Mouliere
- SysDiag UMR3145 – CNRS, National Centre of the Scientific Research/BIO-RAD, Montpellier, France
| | - Bruno Robert
- U896 INSERM, National Institute of Health and Medical Research, University Montpellier1, IRCM, Institute of Oncological Research of Montpellier, Montpellier, France
| | - Erika Arnau Peyrotte
- SysDiag UMR3145 – CNRS, National Centre of the Scientific Research/BIO-RAD, Montpellier, France
| | - Maguy Del Rio
- U896 INSERM, National Institute of Health and Medical Research, University Montpellier1, IRCM, Institute of Oncological Research of Montpellier, Montpellier, France
| | - Marc Ychou
- CRLC, Regional Centre against Cancer, Val d'Aurelle-Paul Lamarque, Montpellier, France
| | - Franck Molina
- SysDiag UMR3145 – CNRS, National Centre of the Scientific Research/BIO-RAD, Montpellier, France
| | - Celine Gongora
- U896 INSERM, National Institute of Health and Medical Research, University Montpellier1, IRCM, Institute of Oncological Research of Montpellier, Montpellier, France
| | - Alain R. Thierry
- SysDiag UMR3145 – CNRS, National Centre of the Scientific Research/BIO-RAD, Montpellier, France
- * E-mail:
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Gongora C, Vezzio-Vie N, Tuduri S, Denis V, Causse A, Auzanneau C, Collod-Beroud G, Coquelle A, Pasero P, Pourquier P, Martineau P, Del Rio M. New Topoisomerase I mutations are associated with resistance to camptothecin. Mol Cancer 2011; 10:64. [PMID: 21619602 PMCID: PMC3120799 DOI: 10.1186/1476-4598-10-64] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Accepted: 05/27/2011] [Indexed: 01/28/2023] Open
Abstract
Background Topoisomerase I (TOP1) is a nuclear enzyme that catalyzes the relaxation of supercoiled DNA during DNA replication and transcription. TOP1 is the molecular target of camptothecin and related drugs such as irinotecan and SN38 (irinotecan's active metabolite). Irinotecan is widely used as an anti-cancer agent in the treatment of metastatic colon cancer. However, its efficacy is often limited by the development of resistance. Methods We previously established several SN38 resistant HCT116-derived clones to study the mechanisms underlying resistance to SN38. Here, we investigated whether resistance to SN38 in these cell lines could be linked to the presence of TOP1 mutations and changes in its expression and activity. Functional analyses were performed on these cell lines challenged with SN38 and we specifically monitored the double strands breaks with γH2AX staining and replication activity with molecular combing. Results In SN38 resistant HCT116 clones we identified three new TOP1 mutations, which are located in the core subdomain III (p.R621H and p.L617I) and in the linker domain (p.E710G) and are packed together at the interface between these two domains. The presence of these TOP1 mutations in SN38 resistant HCT116 cells did not modify TOP1 expression or intrinsic activity. Conversely, following challenge with SN38, we observed a decrease of TOP1-DNA cleavage complexes and a reduction in double-stranded break formation). In addition, we showed that SN38 resistant HCT116 cells present a strong decrease in the SN38-dependent asymmetry of replication forks that is characteristic of SN38 sensitive HCT116 cells. Conclusions These results indicate that the TOP1 mutations are involved in the development of SN38 resistance. We hypothesize that p.L617, p.R621 and p.E710 TOP1 residues are important for the functionality of the linker and that mutation of one of these residues is sufficient to alter or modulate its flexibility. Consequently, linker fluctuations could have an impact on SN38 binding by reducing the enzyme affinity for the drug.
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Affiliation(s)
- Céline Gongora
- Institut de Recherche en Cancérologie de Montpellier, INSERM, Université Montpellier1, CRLC Val d'Aurelle Paul Lamarque, Montpellier, France
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Paillas S, Boissière F, Bibeau F, Denouel A, Mollevi C, Causse A, Denis V, Vezzio-Vié N, Marzi L, Cortijo C, Ait-Arsa I, Askari N, Pourquier P, Martineau P, Del Rio M, Gongora C. Targeting the p38 MAPK pathway inhibits irinotecan resistance in colon adenocarcinoma. Cancer Res 2010; 71:1041-9. [PMID: 21159664 DOI: 10.1158/0008-5472.can-10-2726] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Despite recent advances in the treatment of colon cancer, tumor resistance is a frequent cause of chemotherapy failure. To better elucidate the molecular mechanisms involved in resistance to irinotecan (and its active metabolite SN38), we established SN38-resistant clones derived from HCT-116 and SW48 cell lines. These clones show various levels (6- to 60-fold) of resistance to SN-38 and display enhanced levels of activated MAPK p38 as compared with the corresponding parental cells. Because four different isoforms of p38 have been described, we then studied the effect of p38 overexpression or downregulation of each isoform on cell sensivity to SN38 and found that both α and β isoforms are involved in the development of resistance to SN38. In this line, we show that cell treatment with SB202190, which inhibits p38α and p38β, enhanced the cytotoxic activity of SN38. Moreover, p38 inhibition sensitized tumor cells derived from both SN38-sensitive and -resistant HCT116 cells to irinotecan treatment in xenograft models. Finally, we detected less phosphorylated p38 in primary colon cancer of patients sensitive to irinotecan-based treatment, compared with nonresponder patients. This indicates that enhanced level of phosphorylated p38 could predict the absence of clinical response to irinotecan. Altogether, our results show that the p38 MAPK pathway is involved in irinotecan sensitivity and suggest that phosphorylated p38 expression level could be used as a marker of clinical resistance to irinotecan. They further suggest that targeting the p38 pathway may be a potential strategy to overcome resistance to irinotecan-based chemotherapies in colorectal cancer.
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Affiliation(s)
- Salomé Paillas
- IRCM, Institut de Recherche en Cancérologie de Montpellier, INSERM, U896, Montpellier, F-34298 France
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Thierry AR, Mouliere F, Gongora C, Ollier J, Robert B, Ychou M, Del Rio M, Molina F. Origin and quantification of circulating DNA in mice with human colorectal cancer xenografts. Nucleic Acids Res 2010; 38:6159-75. [PMID: 20494973 PMCID: PMC2952865 DOI: 10.1093/nar/gkq421] [Citation(s) in RCA: 221] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Although circulating DNA (ctDNA) could be an attractive tool for early cancer detection, diagnosis, prognosis, monitoring or prediction of response to therapies, knowledge on its origin, form and rate of release is poor and often contradictory. Here, we describe an experimental system to systematically examine these aspects. Nude mice were xenografted with human HT29 or SW620 colorectal carcinoma (CRC) cells and ctDNA was analyzed by Q-PCR with highly specific and sensitive primer sets at different times post-graft. We could discriminate ctDNA from normal (murine) cells and from mutated and non-mutated tumor (human) cells by using species-specific KRAS or PSAT1 primers and by assessing the presence of the BRAF V600E mutation. The concentration of human (mutated and non-mutated) ctDNA increased significantly with tumor growth. Conversely, and differently from previous studies, low, constant level of mouse ctDNA was observed, thus facilitating the study of mutated and non-mutated tumor derived ctDNA. Finally, analysis of ctDNA fragmentation confirmed the predominance of low-size fragments among tumor ctDNA from mice with bigger tumors. Higher ctDNA fragmentation was also observed in plasma samples from three metastatic CRC patients in comparison to healthy individuals. Our data confirm the predominance of mononucleosome-derived fragments in plasma from xenografted animals and, as a consequence, of apoptosis as a source of ctDNA, in particular for tumor-derived ctDNA. Altogether, our results suggest that ctDNA features vary during CRC tumor development and our experimental system might be a useful tool to follow such variations.
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Affiliation(s)
- Alain R Thierry
- Sysdiag UMR3145 - CNRS/BIO-RAD, CAP DELTA 1682 Rue de la Valsière, 34184 Montpellier CEDEX 4, France.
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