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Xiang-Tischhauser L, Bette M, Rusche JR, Roth K, Kasahara N, Stuck BA, Bakowsky U, Wartenberg M, Sauer H, Geisthoff UW, Mandic R. Generation of a Syngeneic Heterozygous ACVRL1(wt/mut) Knockout iPS Cell Line for the In Vitro Study of HHT2-Associated Angiogenesis. Cells 2023; 12:1600. [PMID: 37371070 DOI: 10.3390/cells12121600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/02/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Hereditary hemorrhagic telangiectasia (HHT) type 2 is an autosomal dominant disease in which one allele of the ACVRL1 gene is mutated. Patients exhibit disturbances in TGF-beta/BMP-dependent angiogenesis and, clinically, often present with severe nosebleeds as well as a reduced quality of life. The aim of our study was to use CRISPR/Cas9 to knockout ACVRL1 in normal induced pluripotent stem cells (iPSCs) and evaluate the effects on TGF-beta- and BMP-related gene expression as well as angiogenesis. The CRISPR/Cas9 knockout of the ACVRL1 gene was carried out in previously characterized wild-type (ACVRL1wt/wt) iPSCs. An HHT type 2 iPS cell line was generated via a single-allele knockout (ACVRL1wt/mut) in wild-type (ACVRL1wt/wt) iPSCs, resulting in a heterozygous 17 bp frameshift deletion in the ACVRL1 gene [NG_009549.1:g.13707_13723del; NM_000020.3:c.1137_1153del]. After the generation of embryoid bodies (EBs), endothelial differentiation was induced via adding 4 ng/mL BMP4, 2% B27, and 10 ng/mL VEGF. Endothelial differentiation was monitored via immunocytochemistry. An analysis of 151 TGF-beta/BMP-related genes was performed via RT-qPCR through the use of mRNA derived from single iPS cell cultures as well as endothelial cells derived from EBs after endothelial differentiation. Differential TGF-beta/BMP gene expression was observed between ACVRL1wt/wt and ACVRL1wt/mut iPSCs as well as endothelial cells. EBs derived from CRISPR/Cas9-designed ACVRL1 mutant HHT type 2 iPSCs, together with their isogenic wild-type iPSC counterparts, can serve as valuable resources for HHT type 2 in vitro studies.
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Affiliation(s)
- Li Xiang-Tischhauser
- VASCERN HHT Reference Centre, Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, 35033 Marburg, Germany
| | - Michael Bette
- Department of Molecular Neuroscience, Institute of Anatomy and Cell Biology, Philipps-Universität Marburg, 35037 Marburg, Germany
| | - Johanna R Rusche
- VASCERN HHT Reference Centre, Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, 35033 Marburg, Germany
| | - Katrin Roth
- Cellular Imaging Core Facility, Center for Tumor Biology and Immunology (ZTI), Philipps-Universität Marburg, 35043 Marburg, Germany
| | - Norio Kasahara
- VASCERN HHT Reference Centre, Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, 35033 Marburg, Germany
- Department of Oral- and Cranio-Maxillofacial Surgery, University Hospital Marburg, Philipps-Universität Marburg, 35043 Marburg, Germany
- Department of Histology and Developmental Biology, Tokyo Dental College, Tokyo 101-0061, Japan
| | - Boris A Stuck
- VASCERN HHT Reference Centre, Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, 35033 Marburg, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, Philipps-Universität Marburg, 35037 Marburg, Germany
| | - Maria Wartenberg
- Department of Internal Medicine I, Division of Cardiology, University Hospital Jena, Friedrich Schiller University, 07747 Jena, Germany
| | - Heinrich Sauer
- Department of Physiology, Justus-Liebig University Giessen, 35392 Giessen, Germany
| | - Urban W Geisthoff
- VASCERN HHT Reference Centre, Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, 35033 Marburg, Germany
| | - Robert Mandic
- VASCERN HHT Reference Centre, Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, 35033 Marburg, Germany
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Rossi E, Lopez-Novoa JM, Bernabeu C. Endoglin involvement in integrin-mediated cell adhesion as a putative pathogenic mechanism in hereditary hemorrhagic telangiectasia type 1 (HHT1). Front Genet 2015; 5:457. [PMID: 25709613 PMCID: PMC4285797 DOI: 10.3389/fgene.2014.00457] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 12/12/2014] [Indexed: 12/11/2022] Open
Abstract
Mutations in the endoglin gene (ENG) are responsible for ∼50% of all cases with hereditary hemorrhagic telangiectasia (HHT). Because of the absence of effective treatments for HHT symptoms, studies aimed at identifying novel biological functions of endoglin which could serve as therapeutic targets of the disease are needed. Endoglin is an endothelial membrane protein, whose most studied function has been its role as an auxiliary receptor in the TGF-β receptor complex. However, several lines of evidence suggest the involvement of endoglin in TGF-β-independent functions. Endoglin displays, within its zona pellucida domain, an RGD motif, which is a prototypic sequence involved in integrin-based interactions with other proteins. Indeed, we have recently described a novel role for endothelial endoglin in leukocyte trafficking and extravasation via its interaction with leukocyte integrins. In addition, functional, as well as protein and gene expression analysis have shown that ectopic endoglin represses the synthesis of several members of the integrin family and modulates integrin-mediated cell adhesions. This review focuses on the tight link between endoglin and integrins and how the role of endothelial endoglin in integrin-dependent cell adhesion processes can provide a better understanding of the pathogenic mechanisms leading to vascular lesions in endoglin haploinsufficient HHT1 patients.
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Affiliation(s)
- Elisa Rossi
- INSERM, Faculté des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, UMR-S 1140 Paris, France
| | - José M Lopez-Novoa
- Renal and Cardiovascular Research Unit, Department of Physiology and Pharmacology, University of Salamanca, and Institute of Biomedical Research of Salamanca Salamanca, Spain
| | - Carmelo Bernabeu
- Centro de Investigaciones Biológicas - Consejo Superior de Investigaciones Científicas and Centro de Investigación Biomédica en Red de Enfermedades Raras Madrid, Spain
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