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Fiorotto R, Raizner A, Morell CM, Torsello B, Scirpo R, Fabris L, Spirli C, Strazzabosco M. Notch signaling regulates tubular morphogenesis during repair from biliary damage in mice. J Hepatol 2013; 59:124-30. [PMID: 23500150 PMCID: PMC3777645 DOI: 10.1016/j.jhep.2013.02.025] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 02/24/2013] [Accepted: 02/28/2013] [Indexed: 12/16/2022]
Abstract
BACKGROUND & AIMS Repair from biliary damages requires the biliary specification of hepatic progenitor cells and the remodeling of ductular reactive structures into branching biliary tubules. We hypothesized that the morphogenetic role of Notch signaling is maintained during the repair process and have addressed this hypothesis using pharmacologic and genetic models of defective Notch signaling. METHODS Treatment with DDC (3,5-diethoxycarbonyl-1,4-dihydrocollidine) or ANIT (alpha-naphthyl-isothiocyanate) was used to induce biliary damage in wild type mice and in mice with a liver specific defect in the Notch-2 receptor (Notch-2-cKO) or in RPB-Jk. Hepatic progenitor cells, ductular reaction, and mature ductules were quantified using K19 and SOX-9. RESULTS In DDC treated wild type mice, pharmacologic Notch inhibition with dibenzazepine decreased the number of both ductular reaction and hepatic progenitor cells. Notch-2-cKO mice treated with DDC or ANIT accumulated hepatic progenitor cells that failed to progress into mature ducts. In RBP-Jk-cKO mice, mature ducts and hepatic progenitor cells were both significantly reduced with respect to similarly treated wild type mice. The mouse progenitor cell line BMOL cultured on matrigel, formed a tubular network allowing the study of tubule formation in vitro; γ-secretase inhibitor treatment and siRNAs silencing of Notch-1, Notch-2 or Jagged-1 significantly reduced both the length and number of tubular branches. CONCLUSIONS These data demonstrate that Notch signaling plays an essential role in biliary repair. Lack of Notch-2 prevents biliary tubule formation, both in vivo and in vitro. Lack of RBP-Jk inhibits the generation of biliary-committed precursors and tubule formation.
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Affiliation(s)
- Romina Fiorotto
- Liver Center & Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Aileen Raizner
- Liver Center & Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Carola M. Morell
- Department of Surgery and Interdisciplinary Medicine, University of Milano-Bicocca, Milan, Italy
| | - Barbara Torsello
- Department of Health Sciences, University of Milano-Bicocca, Milan, Italy
| | - Roberto Scirpo
- Department of Surgery and Interdisciplinary Medicine, University of Milano-Bicocca, Milan, Italy
| | - Luca Fabris
- Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy
| | - Carlo Spirli
- Liver Center & Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Mario Strazzabosco
- Liver Center & Section of Digestive Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA,Department of Surgery and Interdisciplinary Medicine, University of Milano-Bicocca, Milan, Italy,Corresponding author. Address: Dept. of Internal Medicine, Section of Digestive Diseases, Yale University School of Medicine, 333 Cedar Street LMP1080, New Haven, CT 06520, USA. Tel.: +1 203 785 7281; fax: +1 203 785 7273. (M. Strazzabosco)
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Pandya K, Meeke K, Clementz AG, Rogowski A, Roberts J, Miele L, Albain KS, Osipo C. Targeting both Notch and ErbB-2 signalling pathways is required for prevention of ErbB-2-positive breast tumour recurrence. Br J Cancer 2011; 105:796-806. [PMID: 21847123 PMCID: PMC3171020 DOI: 10.1038/bjc.2011.321] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 07/12/2011] [Accepted: 07/18/2011] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND We reported that Notch-1, a potent breast oncogene, is activated in response to trastuzumab and contributes to trastuzumab resistance in vitro. We sought to determine the preclinical benefit of combining a Notch inhibitor (γ-secretase inhibitor (GSI)) and trastuzumab in both trastuzumab-sensitive and trastuzumab-resistant, ErbB-2-positive, BT474 breast tumours in vivo. We also studied if the combination therapy of lapatinib plus GSI can induce tumour regression of ErbB-2-positive breast cancer. METHODS We generated orthotopic breast tumour xenografts from trastuzumab- or lapatinib-sensitive and trastuzumab-resistant BT474 cells. We investigated the antitumour activities of two distinct GSIs, LY 411 575 and MRK-003, in vivo. RESULTS Our findings showed that combining trastuzumab plus a GSI completely prevented (MRK-003 GSI) or significantly reduced (LY 411 575 GSI) breast tumour recurrence post-trastuzumab treatment in sensitive tumours. Moreover, combining lapatinib plus MRK-003 GSI showed significant reduction of tumour growth. Furthermore, a GSI partially reversed trastuzumab resistance in resistant tumours. CONCLUSION Our data suggest that a combined inhibition of Notch and ErbB-2 signalling pathways could decrease recurrence rates for ErbB-2-positive breast tumours and may be beneficial in the treatment of recurrent trastuzumab-resistant disease.
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MESH Headings
- Amyloid Precursor Protein Secretases/antagonists & inhibitors
- Amyloid Precursor Protein Secretases/therapeutic use
- Animals
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Breast Neoplasms/drug therapy
- Breast Neoplasms/genetics
- Breast Neoplasms/pathology
- Breast Neoplasms/prevention & control
- Cell Line, Tumor
- Cyclic S-Oxides/pharmacology
- Drug Resistance, Neoplasm
- Female
- Gene Targeting
- Genes, erbB
- Genes, erbB-2
- Humans
- Lapatinib
- Mice
- Mice, Nude
- Neoplasm Transplantation
- Quinazolines/administration & dosage
- Receptor, ErbB-2/metabolism
- Receptors, Notch/antagonists & inhibitors
- Receptors, Notch/genetics
- Recurrence
- Signal Transduction/drug effects
- Thiadiazoles/pharmacology
- Trastuzumab
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Affiliation(s)
- K Pandya
- Molecular Biology Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
| | - K Meeke
- Oncology Institute, Stritch School of Medicine at Loyola University Medical Center, 2160 South First Avenue, Maywood, IL 60153, USA
| | - A G Clementz
- Molecular and Cellular Biochemistry Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
| | - A Rogowski
- Molecular Biology Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
| | - J Roberts
- Oncology Institute, Stritch School of Medicine at Loyola University Medical Center, 2160 South First Avenue, Maywood, IL 60153, USA
| | - L Miele
- University of Mississippi Cancer Institute, 350 Woodrow Wilson Drive, Suite 600, Jackson, MS 39213, USA
| | - K S Albain
- Department of Medicine, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
| | - C Osipo
- Molecular Biology Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
- Oncology Institute, Stritch School of Medicine at Loyola University Medical Center, 2160 South First Avenue, Maywood, IL 60153, USA
- Molecular and Cellular Biochemistry Program, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
- Department of Pathology, 2160 South First Avenue, Maywood, IL 60153, USA
- Department of Microbiology and Immunology, 2160 South First Avenue, Maywood, IL 60153, USA
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