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Homayed Z, Belthier G, Pannequin J. [Presurgical immunotherapy: A promising therapy to prevent tumor relapse in colorectal cancer]. Med Sci (Paris) 2023; 39:487-489. [PMID: 37387651 DOI: 10.1051/medsci/2023067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023] Open
Affiliation(s)
- Zeinab Homayed
- Institut de génomique fonctionnelle, univ. Montpellier, CNRS, Inserm, Montpellier, France
| | - Guillaume Belthier
- Oncode institute, The Netherlands Cancer Institute, Division of Molecular Pathology, Amsterdam, Pays-Bas
| | - Julie Pannequin
- Institut de génomique fonctionnelle, univ. Montpellier, CNRS, Inserm, Montpellier, France
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2
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Jacquemin G, Wurmser A, Huyghe M, Sun W, Homayed Z, Merle C, Perkins M, Qasrawi F, Richon S, Dingli F, Arras G, Loew D, Vignjevic D, Pannequin J, Fre S. Paracrine signalling between intestinal epithelial and tumour cells induces a regenerative programme. eLife 2022; 11:76541. [PMID: 35543624 PMCID: PMC9094746 DOI: 10.7554/elife.76541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 04/20/2022] [Indexed: 12/13/2022] Open
Abstract
Tumours are complex ecosystems composed of different types of cells that communicate and influence each other. While the critical role of stromal cells in affecting tumour growth is well established, the impact of mutant cancer cells on healthy surrounding tissues remains poorly defined. Here, using mouse intestinal organoids, we uncover a paracrine mechanism by which intestinal cancer cells reactivate foetal and regenerative YAP-associated transcriptional programmes in neighbouring wildtype epithelial cells, rendering them adapted to thrive in the tumour context. We identify the glycoprotein thrombospondin-1 (THBS1) as the essential factor that mediates non-cell-autonomous morphological and transcriptional responses. Importantly, Thbs1 is associated with bad prognosis in several human cancers. This study reveals the THBS1-YAP axis as the mechanistic link mediating paracrine interactions between epithelial cells in intestinal tumours.
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Affiliation(s)
- Guillaume Jacquemin
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France.,Sorbonne University, UPMC University of Paris VI, Paris, France
| | - Annabelle Wurmser
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
| | - Mathilde Huyghe
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
| | - Wenjie Sun
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
| | - Zeinab Homayed
- IGF, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Candice Merle
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
| | - Meghan Perkins
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
| | - Fairouz Qasrawi
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
| | - Sophie Richon
- Institut Curie, PSL Research University, CNRS UMR 144, Paris, France
| | - Florent Dingli
- Institut Curie, PSL Research University, Laboratory of Mass Spectrometry and Proteomics, Paris, France
| | - Guillaume Arras
- Institut Curie, PSL Research University, Laboratory of Mass Spectrometry and Proteomics, Paris, France
| | - Damarys Loew
- Institut Curie, PSL Research University, Laboratory of Mass Spectrometry and Proteomics, Paris, France
| | | | - Julie Pannequin
- IGF, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Silvia Fre
- Institut Curie, Laboratory of Genetics and Developmental Biology, PSL Research University, INSERM U934, CNRS UMR3215, Paris, France
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Belthier G, Homayed Z, Bouclier C, Asari M, Pannequin J. Circulating Tumor Cell Lines: an Innovative Tool for Fundamental and Translational Research. J Vis Exp 2021. [PMID: 35001913 DOI: 10.3791/62329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Metastasis is a leading cause of cancer death. Despite improvements in treatment strategies, metastatic cancer has a poor prognosis. We thus face an urgent need to understand the mechanisms behind metastasis development, and thus to propose efficient treatments for advanced cancer. Metastatic cancers are hard to treat, as biopsies are invasive and inaccessible. Recently, there has been considerable interest in liquid biopsies including both cell-free circulating deoxyribonucleic acid (DNA) and circulating tumor cells from peripheral blood and we have established several circulating tumor cell lines from metastatic colorectal cancer patients to participate in their characterization. Indeed, to functionally characterize these rare and poorly described cells, the crucial step is to expand them. Once established, circulating tumor cell (CTC) lines can then be cultured in suspension or adherent conditions. At the molecular level, CTC lines can be further used to assess the expression of specific markers of interest (such as differentiation, epithelial or cancer stem cells) by immunofluorescence or cytometry analysis. In addition, CTC lines can be used to assess drug sensitivity to gold-standard chemotherapies as well as to targeted therapies. The ability of CTC lines to initiate tumors can also be tested by subcutaneous injection of CTCs in immunodeficient mice. Finally, it is possible to test the role of specific genes of interest that might be involved in cancer dissemination by editing CTC genes, by short hairpin ribonucleic acid (shRNA) or Crispr/Cas9. Modified CTCs can thus be injected into immunodeficient mouse spleens, to experimentally mimic part of the metastatic development process in vivo. In conclusion, CTC lines are a precious tool for future research and for personalized medicine, where they will allow prediction of treatment efficiency using the very cells that are originally responsible for metastasis.
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Affiliation(s)
- Guillaume Belthier
- Department of Physiology and Cancer, Institute for Functional Genomics, Montpellier University
| | - Zeinab Homayed
- Department of Physiology and Cancer, Institute for Functional Genomics, Montpellier University
| | - Céline Bouclier
- Department of Physiology and Cancer, Institute for Functional Genomics, Montpellier University
| | - Muriel Asari
- Department of Physiology and Cancer, Institute for Functional Genomics, Montpellier University
| | - Julie Pannequin
- Department of Physiology and Cancer, Institute for Functional Genomics, Montpellier University;
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Belthier G, Homayed Z, Grillet F, Duperray C, Vendrell J, Krol I, Bravo S, Boyer JC, Villeronce O, Vitre-Boubaker J, Heaug-Wane D, Macari-Fine F, Smith J, Merlot M, Lossaint G, Mazard T, Portales F, Solassol J, Ychou M, Aceto N, Mamessier E, Bertucci F, Pascussi JM, Samalin E, Hollande F, Pannequin J. CD44v6 Defines a New Population of Circulating Tumor Cells Not Expressing EpCAM. Cancers (Basel) 2021; 13:cancers13194966. [PMID: 34638450 PMCID: PMC8508506 DOI: 10.3390/cancers13194966] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 12/15/2022] Open
Abstract
Simple Summary In the present work, we describe (for the first time) the use of the transmembrane protein, CD44v6, to detect CTCs from blood samples of several patients with colorectal or breast cancer. We used CD44v6 antibodies to demonstrate that live CTCs can be specifically purified from CRC patient blood samples via magnetic bead- or FACS-based isolation techniques. Finally, we demonstrated that CD44v6-positive CTCs rarely expressed EpCam, which is currently the gold standard to enumerate CTCs, suggesting the need to use a combination of markers for a more comprehensive view of CTC heterogeneity. Abstract Circulating tumor cells (CTCs) are promising diagnostic and prognostic tools for clinical use. In several cancers, including colorectal and breast, the CTC load has been associated with a therapeutic response as well as progression-free and overall survival. However, counting and isolating CTCs remains sub-optimal because they are currently largely identified by epithelial markers such as EpCAM. New, complementary CTC surface markers are therefore urgently needed. We previously demonstrated that a splice variant of CD44, CD44 variable alternative exon 6 (CD44v6), is highly and specifically expressed by CTC cell lines derived from blood samples in colorectal cancer (CRC) patients. Two different approaches—immune detection coupled with magnetic beads and fluorescence-activated cell sorting—were optimized to purify CTCs from patient blood samples based on high expressions of CD44v6. We revealed the potential of the CD44v6 as a complementary marker to EpCAM to detect and purify CTCs in colorectal cancer blood samples. Furthermore, this marker is not restricted to colorectal cancer since CD44v6 is also expressed on CTCs from breast cancer patients. Overall, these results strongly suggest that CD44v6 could be useful to enumerate and purify CTCs from cancers of different origins, paving the way to more efficacious combined markers that encompass CTC heterogeneity.
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Affiliation(s)
- Guillaume Belthier
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
| | - Zeinab Homayed
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
| | - Fanny Grillet
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
| | | | - Julie Vendrell
- Department of Pathology and Onco-Biology, CHU Montpellier, 34295 Montpellier, France; (J.V.); (J.S.)
| | - Ilona Krol
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland; (I.K.); (N.A.)
| | - Sophie Bravo
- Laboratoire de Biochimie, CHU Carémeau, 30900 Nîmes, France; (S.B.); (J.-C.B.)
| | | | - Olivia Villeronce
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
| | - Jihane Vitre-Boubaker
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
| | - Diana Heaug-Wane
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
| | - Françoise Macari-Fine
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
| | - Jai Smith
- Department of Clinical Pathology, Victorian Comprehensive Cancer Centre, The University of Melbourne, Melbourne, VIC 3010, Australia; (J.S.); (F.H.)
- University of Melbourne Centre for Cancer Research, Victorian Comprehensive Cancer Centre, Melbourne, VIC 3010, Australia
| | - Matthieu Merlot
- Medical Oncology Department, Institut du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (M.M.); (G.L.); (T.M.); (F.P.); (M.Y.)
| | - Gérald Lossaint
- Medical Oncology Department, Institut du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (M.M.); (G.L.); (T.M.); (F.P.); (M.Y.)
| | - Thibault Mazard
- Medical Oncology Department, Institut du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (M.M.); (G.L.); (T.M.); (F.P.); (M.Y.)
| | - Fabienne Portales
- Medical Oncology Department, Institut du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (M.M.); (G.L.); (T.M.); (F.P.); (M.Y.)
| | - Jérôme Solassol
- Department of Pathology and Onco-Biology, CHU Montpellier, 34295 Montpellier, France; (J.V.); (J.S.)
- Montpellier Research Cancer Institute (IRCM), INSERM U1194, University of Montpellier, 34298 Montpellier, France
| | - Marc Ychou
- Medical Oncology Department, Institut du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (M.M.); (G.L.); (T.M.); (F.P.); (M.Y.)
| | - Nicola Aceto
- Department of Biology, Institute of Molecular Health Sciences, ETH Zurich, 8093 Zurich, Switzerland; (I.K.); (N.A.)
| | - Emilie Mamessier
- Predictive Oncology Laboratory, Cancer Research Center of Marseille (CRCM), Inserm U1068, CNRS UMR7258, Institut Paoli-Calmettes, Aix Marseille Université, 13009 Marseille, France; (E.M.); (F.B.)
| | - François Bertucci
- Predictive Oncology Laboratory, Cancer Research Center of Marseille (CRCM), Inserm U1068, CNRS UMR7258, Institut Paoli-Calmettes, Aix Marseille Université, 13009 Marseille, France; (E.M.); (F.B.)
| | - Jean Marc Pascussi
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
| | - Emmanuelle Samalin
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
- Medical Oncology Department, Institut du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (M.M.); (G.L.); (T.M.); (F.P.); (M.Y.)
| | - Frédéric Hollande
- Department of Clinical Pathology, Victorian Comprehensive Cancer Centre, The University of Melbourne, Melbourne, VIC 3010, Australia; (J.S.); (F.H.)
- University of Melbourne Centre for Cancer Research, Victorian Comprehensive Cancer Centre, Melbourne, VIC 3010, Australia
| | - Julie Pannequin
- Institute of Functional Genomics (IGF), UMR5203 CNRS, U1191 INSERM and UM, 34094 Montpellier, France; (G.B.); (Z.H.); (F.G.); (O.V.); (J.V.-B.); (D.H.-W.); (F.M.-F.); (J.M.P.); (E.S.)
- Correspondence:
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Zindel D, Mensat P, Vol C, Homayed Z, Charrier-Savournin F, Trinquet E, Banères JL, Pin JP, Pannequin J, Roux T, Dupuis E, Prézeau L. G protein-coupled receptors can control the Hippo/YAP pathway through Gq signaling. FASEB J 2021; 35:e21668. [PMID: 34114695 DOI: 10.1096/fj.202002159r] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 04/21/2021] [Accepted: 04/30/2021] [Indexed: 11/11/2022]
Abstract
The Hippo pathway is an evolutionarily conserved kinase cascade involved in the control of tissue homeostasis, cellular differentiation, proliferation, and organ size, and is regulated by cell-cell contact, apical cell polarity, and mechanical signals. Miss-regulation of this pathway can lead to cancer. The Hippo pathway acts through the inhibition of the transcriptional coactivators YAP and TAZ through phosphorylation. Among the various signaling mechanisms controlling the hippo pathway, activation of G12/13 by G protein-coupled receptors (GPCR) recently emerged. Here we show that a GPCR, the ghrelin receptor, that activates several types of G proteins, including G12/13, Gi/o, and Gq, can activate YAP through Gq/11 exclusively, independently of G12/13. We revealed that a strong basal YAP activation results from the high constitutive activity of this receptor, which can be further increased upon agonist activation. Thus, acting on ghrelin receptor allowed to modulate up-and-down YAP activity, as activating the receptor increased YAP activity and blocking constitutive activity reduced YAP activity. Our results demonstrate that GPCRs can be used as molecular switches to finely up- or down-regulate YAP activity through a pure Gq pathway.
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Affiliation(s)
- Diana Zindel
- Institut de Génomique Fonctionnelle (IGF), Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | | | - Claire Vol
- Institut de Génomique Fonctionnelle (IGF), Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Zeinab Homayed
- Institut de Génomique Fonctionnelle (IGF), Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | | | | | - Jean-Louis Banères
- Institut des Biomolécules Max Mousseron, Univ. Montpellier, CNRS, Montpellier, France
| | - Jean-Philippe Pin
- Institut de Génomique Fonctionnelle (IGF), Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Julie Pannequin
- Institut de Génomique Fonctionnelle (IGF), Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | | | | | - Laurent Prézeau
- Institut de Génomique Fonctionnelle (IGF), Univ. Montpellier, CNRS, INSERM, Montpellier, France
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6
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Mitoyan L, Chevrier V, Hernandez-Vargas H, Ollivier A, Homayed Z, Pannequin J, Poizat F, De Biasi-Cador C, Charafe-Jauffret E, Ginestier C, Guasch G. A stem cell population at the anorectal junction maintains homeostasis and participates in tissue regeneration. Nat Commun 2021; 12:2761. [PMID: 33980830 PMCID: PMC8115161 DOI: 10.1038/s41467-021-23034-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 04/11/2021] [Indexed: 11/09/2022] Open
Abstract
At numerous locations of the body, transition zones are localized at the crossroad between two types of epithelium and are frequently associated with neoplasia involving both type of tissues. These transition zones contain cells expressing markers of adult stem cells that can be the target of early transformation. The mere fact that transition zone cells can merge different architecture with separate functions implies for a unique plasticity that these cells must display in steady state. However, their roles during tissue regeneration in normal and injured state remain unknown. Here, by using in vivo lineage tracing, single-cell transcriptomics, computational modeling and a three-dimensional organoid culture system of transition zone cells, we identify a population of Krt17+ basal cells with multipotent properties at the squamo-columnar anorectal junction that maintain a squamous epithelium during normal homeostasis and can participate in the repair of a glandular epithelium following tissue injury.
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Affiliation(s)
- Louciné Mitoyan
- Aix-Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Epithelial Stem Cells and Cancer Team, Marseille, France
| | - Véronique Chevrier
- Aix-Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Epithelial Stem Cells and Cancer Team, Marseille, France
| | - Hector Hernandez-Vargas
- Department of Immunity, Virus and Inflammation, Cancer Research Center of Lyon (CRCL), Inserm U 1052, CNRS UMR 5286, Université de Lyon, Centre Léon Bérard, Lyon Cedex 08, France.,Department of Translational Research and Innovation, Centre Léon Bérard, Lyon Cedex 08, France
| | - Alexane Ollivier
- Aix-Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Epithelial Stem Cells and Cancer Team, Marseille, France
| | - Zeinab Homayed
- CNRS, UMR5203, Inserm U661, Institut de Génomique Fonctionnelle, Montpellier, France
| | - Julie Pannequin
- CNRS, UMR5203, Inserm U661, Institut de Génomique Fonctionnelle, Montpellier, France
| | - Flora Poizat
- Department of Biopathology, Institut Paoli-Calmettes, Marseille, France
| | | | - Emmanuelle Charafe-Jauffret
- Aix-Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Epithelial Stem Cells and Cancer Team, Marseille, France.,Department of Biopathology, Institut Paoli-Calmettes, Marseille, France
| | - Christophe Ginestier
- Aix-Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Epithelial Stem Cells and Cancer Team, Marseille, France
| | - Géraldine Guasch
- Aix-Marseille University, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Epithelial Stem Cells and Cancer Team, Marseille, France.
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7
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Giraud J, Foroutan M, Boubaker-Vitre J, Grillet F, Homayed Z, Jadhav U, Crespy P, Breuker C, Bourgaux JF, Hazerbroucq J, Pignodel C, Brulin B, Shivdasani RA, Jay P, Hollande F, Pannequin J. Progastrin production transitions from Bmi1 +/Prox1 + to Lgr5 high cells during early intestinal tumorigenesis. Transl Oncol 2020; 14:101001. [PMID: 33360299 PMCID: PMC7772574 DOI: 10.1016/j.tranon.2020.101001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/30/2020] [Accepted: 12/15/2020] [Indexed: 11/29/2022] Open
Abstract
Secretion of progastrin is a signature event of early malignant transformation in the colon. In the healthy epithelium, progastrin is produced by a subset of enteroendocrine cells expressing both Bmi1 and Prox1. LGR5-high intestinal stem cells are a primary source of progastrin production in early mouse and human intestinal adenomas.
Progastrin is an unprocessed soluble peptide precursor with a well-described tumor-promoting role in colorectal cancer. It is expressed at small levels in the healthy intestinal mucosa, and its expression is enhanced at early stages of intestinal tumor development, with high levels of this peptide in hyperplastic intestinal polyps being associated with poor neoplasm-free survival in patients. Yet, the precise type of progastrin-producing cells in the healthy intestinal mucosa and in early adenomas remains unclear. Here, we used a combination of immunostaining, RNAscope labelling and retrospective analysis of single cell RNAseq results to demonstrate that progastrin is produced within intestinal crypts by a subset of Bmi1+/Prox1+/LGR5low endocrine cells, previously shown to act as replacement stem cells in case of mucosal injury. In contrast, our findings indicate that intestinal stem cells, specified by expression of the Wnt signaling target LGR5, become the main source of progastrin production in early mouse and human intestinal adenomas. Collectively our results suggest that the previously identified feed-forward mechanisms between progastrin and Wnt signaling is a hallmark of early neoplastic transformation in mouse and human colonic adenomas.
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Affiliation(s)
- J Giraud
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - M Foroutan
- Department of Clinical Pathology, The University of Melbourne, Victorian Comprehensive Cancer Centre, Melbourne, VIC 3000, Australia; University of Melbourne Centre for Cancer Research, Melbourne, VIC 3000, Australia
| | | | - F Grillet
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Z Homayed
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - U Jadhav
- Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - P Crespy
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - C Breuker
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - J-F Bourgaux
- Service d'Hépato-Gastroentérologie, CHU Carémeau, Nîmes, France
| | - J Hazerbroucq
- Service d'Anatomo-Pathologie, CHU Carémeau, Nîmes, France
| | - C Pignodel
- Service d'Anatomo-Pathologie, CHU Carémeau, Nîmes, France
| | - B Brulin
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - R A Shivdasani
- Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA, USA
| | - P Jay
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - F Hollande
- Department of Clinical Pathology, The University of Melbourne, Victorian Comprehensive Cancer Centre, Melbourne, VIC 3000, Australia; University of Melbourne Centre for Cancer Research, Melbourne, VIC 3000, Australia.
| | - J Pannequin
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France.
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