Article (Scientific journals)
WNT11, a new gene associated with early-onset osteoporosis, is required for osteoblastogenesis.
Caetano Da Silva, Caroline; Edouard, Thomas; Fradin, Melanie et al.
2022In Human Molecular Genetics
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Keywords :
Genetics (clinical); Genetics; Molecular Biology; General Medicine; Human Genetics; cell signalling; Wnt Pathway; early-onset osteoporosis; osteoblastogenesis; Bone Mineral Density
Abstract :
[en] Monogenic early-onset osteoporosis (EOOP) is a rare disease defined by low bone mineral density (BMD) that results in increased risk of fracture in children and young adults. Although several causative genes have been identified, some of the EOOP causation remains unresolved. Whole-exome sequencing revealed a de novo heterozygous loss-of-function mutation in WNT11 (NM_004626.2:c.677_678dup p.Leu227Glyfs*22) in a 4-year-old boy with low BMD and fractures. We identified two heterozygous WNT11 missense variants (NM_004626.2:c.217G > A p.Ala73Thr) and (NM_004626.2:c.865G > A p.Val289Met) in a 51-year-old woman and in a 61-year-old woman respectively, both with bone fragility. U2OS cells with heterozygous WNT11 mutation (NM_004626.2:c.690_721delfs*40) generated by CRISPR-Cas9 showed reduced cell proliferation (30%) and osteoblast differentiation (80%) as compared with wild-type U2OS cells. The expression of genes in the Wnt canonical and non-canonical pathways was inhibited in these mutant cells, but recombinant WNT11 treatment rescued the expression of Wnt pathway target genes. Furthermore, the expression of RSPO2, a WNT11 target involved in bone cell differentiation, and its receptor LGR5, was decreased in WNT11 mutant cells. Treatment with WNT5A and WNT11 recombinant proteins reversed LGR5 expression, but WNT3A recombinant protein treatment had no effect on LGR5 expression in mutant cells. Moreover, treatment with recombinant RSPO2 but not WNT11 or WNT3A activated the canonical pathway in mutant cells. In conclusion, we have identified WNT11 as a new gene responsible for EOOP, with loss-of-function variant inhibiting bone formation via Wnt canonical and non-canonical pathways. WNT11 may activate Wnt signaling by inducing the RSPO2-LGR5 complex via the non-canonical Wnt pathway.
Disciplines :
Genetics & genetic processes
Author, co-author :
Caetano Da Silva, Caroline ;  INSERM U1132 and Université de Paris, Reference Centre for Rare Bone Diseases, Hospital Lariboisière, F-75010 Paris, France
Edouard, Thomas ;  Endocrine Bone Diseases and Genetics Unit, Reference Centre for Rare Diseases of Calcium and Phosphate Metabolism, ERN BOND, OSCAR Network, Pediatric Clinical Research Unit, Children's Hospital, RESTORE INSERM U1301, Toulouse University Hospital, Toulouse, 31300, France
Fradin, Melanie;  Service de génétique clinique, centre de référence des anomalies du développement de l'Ouest, hôpital Sud de Rennes, F-35033 Rennes, France
Aubert-Mucca, Marion;  Endocrine Bone Diseases and Genetics Unit, Reference Centre for Rare Diseases of Calcium and Phosphate Metabolism, ERN BOND, OSCAR Network, Pediatric Clinical Research Unit, Children's Hospital, RESTORE INSERM U1301, Toulouse University Hospital, Toulouse, 31300, France
Ricquebourg, Manon;  INSERM U1132 and Université de Paris, Reference Centre for Rare Bone Diseases, Hospital Lariboisière, F-75010 Paris, France
Raman, Ratish ;  Université de Liège - ULiège > GIGA > GIGA I3 - Laboratory for Organogenesis and Regeneration
Salles, Jean Pierre;  Endocrine Bone Diseases and Genetics Unit, Reference Centre for Rare Diseases of Calcium and Phosphate Metabolism, ERN BOND, OSCAR Network, Pediatric Clinical Research Unit, Children's Hospital, RESTORE INSERM U1301, Toulouse University Hospital, Toulouse, 31300, France
Charon, Valérie;  Department of Radiology, CHU de Rennes, F-35000 Rennes, France
Guggenbuhl, Pascal;  Department of Rheumatology, CHU de Rennes, F-35000 Rennes, France
Muller, Marc  ;  Université de Liège - ULiège > GIGA > GIGA I3 - Laboratory for Organogenesis and Regeneration
Cohen-Solal, Martine;  INSERM U1132 and Université de Paris, Reference Centre for Rare Bone Diseases, Hospital Lariboisière, F-75010 Paris, France
Collet, Corinne;  INSERM U1132 and Université de Paris, Reference Centre for Rare Bone Diseases, Hospital Lariboisière, F-75010 Paris, France ; UF de Génétique Moléculaire, Hôpital Robert Debré, APHP, F-75019 Paris, France
Language :
English
Title :
WNT11, a new gene associated with early-onset osteoporosis, is required for osteoblastogenesis.
Publication date :
2022
Journal title :
Human Molecular Genetics
ISSN :
0964-6906
eISSN :
1460-2083
Publisher :
Oxford University Press (OUP), England
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
EU - European Union [BE]
Available on ORBi :
since 13 May 2022

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