Encyclopedia of Signaling Molecules

2018 Edition
| Editors: Sangdun Choi


  • Steffen K. Meurer
  • Ralf WeiskirchenEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-67199-4_101593


Historical Background

Endoglin (OMIM 131195), also known as cluster of differentiation CD105, was originally identified in endothelial cells by immunofluorescence using a monoclonal antibody (mAb 44G4) raised against a human pre-B leukemia cell line (Gougos and Letarte 1988). Later it was shown that endoglin is also expressed outside the endothelium in pro-fibrogenic and immune cells (Meurer et al. 2014; Ojeda-Fernandez et al. 2016). It is an integral membrane-bound disulfide-linked 180 kDa homodimeric receptor that acts as an auxiliary receptor for ligands of the transforming growth factor-β (TGF-β) superfamily. Endoglin interacts with the TGF-β signaling receptors and influences Smad-dependent and Smad-independent effects. The endoglin gene produces two splice variants (i.e., S- and L-endoglin) which cause a different response outcome due to the sequence variation of their cytoplasmic tails. Regulated ectodomain shedding by matrix metalloprotease-14...

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RW is supported by grants from the German Research Foundation (SFB/TRR57, P13/Q3) and a grant from the Interdisciplinary Centre for Clinical Research within the Faculty of Medicine at the RWTH Aachen University (IZKF Aachen, Project E7-6). The authors are grateful to Sabine Weiskirchen for preparing line drawings, Dr. J. MacDonald (Department of Radiology, Hereditary Hemorrhagic Telangiectasia Center, University of Utah, Salt Lake City, UT, USA) and Dr. U. Geisthoff (Department of Otorhinolaryngology, Essen University Hospital, Essen, Germany) for providing photographs. In addition, the authors would like to thank the colleagues Prof. Frank Gaillard, Dr. Andrew Dixon, and Dr. Nasir Siddiqui that deposited radiology images in the Radiopaedia.org resource and allowed us to use them in our work.


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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical ChemistryRWTH University Hospital AachenAachenGermany