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A GDF5 Point Mutation Strikes Twice - Causing BDA1 and SYNS2

Please always quote using this URN: urn:nbn:de:bvb:20-opus-127556
  • Growth and Differentiation Factor 5 (GDF5) is a secreted growth factor that belongs to the Bone Morphogenetic Protein (BMP) family and plays a pivotal role during limb development. GDF5 is a susceptibility gene for osteoarthritis (OA) and mutations in GDF5 are associated with a wide variety of skeletal malformations ranging from complex syndromes such as acromesomelic chondrodysplasias to isolated forms of brachydactylies or multiple synostoses syndrome 2 (SYNS2). Here, we report on a family with an autosomal dominant inherited combination ofGrowth and Differentiation Factor 5 (GDF5) is a secreted growth factor that belongs to the Bone Morphogenetic Protein (BMP) family and plays a pivotal role during limb development. GDF5 is a susceptibility gene for osteoarthritis (OA) and mutations in GDF5 are associated with a wide variety of skeletal malformations ranging from complex syndromes such as acromesomelic chondrodysplasias to isolated forms of brachydactylies or multiple synostoses syndrome 2 (SYNS2). Here, we report on a family with an autosomal dominant inherited combination of SYNS2 and additional brachydactyly type A1 (BDA1) caused by a single point mutation in GDF5 (p.W414R). Functional studies, including chondrogenesis assays with primary mesenchymal cells, luciferase reporter gene assays and Surface Plasmon Resonance analysis, of the GDF5 W-414R variant in comparison to other GDF5 mutations associated with isolated BDA1 (p.R399C) or SYNS2 (p.E491K) revealed a dual pathomechanism characterized by a gain-and loss-of-function at the same time. On the one hand insensitivity to the main GDF5 antagonist NOGGIN (NOG) leads to a GDF5 gain of function and subsequent SYNS2 phenotype. Whereas on the other hand, a reduced signaling activity, specifically via the BMP receptor type IA (BMPR1A), is likely responsible for the BDA1 phenotype. These results demonstrate that one mutation in the overlapping interface of antagonist and receptor binding site in GDF5 can lead to a GDF5 variant with pathophysiological relevance for both, BDA1 and SYNS2 development. Consequently, our study assembles another part of the molecular puzzle of how loss and gain of function mutations in GDF5 affect bone development in hands and feet resulting in specific types of brachydactyly and SYNS2. These novel insights into the biology of GDF5 might also provide further clues on the pathophysiology of OA.show moreshow less

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Metadaten
Author: Elisa Degenkolbe, Jana König, Julia Zimmer, Maria Walther, Carsten Reißner, Joachim Nickel, Frank Plöger, Jelena Raspopovic, James Sharpe, Katharina Dathe, Jacqueline T. Hecht, Stefan Mundlos, Sandra C. Doelken, Petra Seemann
URN:urn:nbn:de:bvb:20-opus-127556
Document Type:Journal article
Faculties:Medizinische Fakultät / Theodor-Boveri-Institut für Biowissenschaften
Medizinische Fakultät / Lehrstuhl für Tissue Engineering und Regenerative Medizin
Language:English
Parent Title (English):PLOS Genetics
ISSN:1553-7404
Year of Completion:2013
Volume:9
Issue:10
Pagenumber:e1003846
Source:PLoS Genetics 9(10): e1003846. doi:10.1371/journal.pgen.1003846
DOI:https://doi.org/10.1371/journal.pgen.1003846
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 611 Menschliche Anatomie, Zytologie, Histologie
Tag:BMP; brachtydacyly type A2; crystal-structure; differentiation; dominant-negative mutatio; gene encoding noggin; growth factor beta; molecular mechanism; morphogenetic protein receptors; signal tranduction
Release Date:2016/03/21
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung