1
|
Wang Y, He J, Li M, Xu J, Yang H, Zhang Y. Abamectin at environmentally relevant concentrations impairs bone development in zebrafish larvae. Comp Biochem Physiol C Toxicol Pharmacol 2024; 287:110039. [PMID: 39265967 DOI: 10.1016/j.cbpc.2024.110039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2024] [Revised: 08/30/2024] [Accepted: 09/08/2024] [Indexed: 09/14/2024]
Abstract
Abamectin (ABM) is a widely used pesticide in agriculture and veterinary medicine, which primarily acts by disrupting the neurological physiology of pests, leading to their paralysis and death. Its extensive application has resulted in contamination of many natural water bodies. While the adverse effects of ABM on the growth and development of non-target organisms are well documented, its impact on bone development remains inadequately studied. The present study aimed to investigate the effects of environmentally relevant concentrations of ABM (1, 5, 25 μg/L) on early bone development in zebrafish. Our results indicated that ABM significantly affected both cartilage and bone development of zebrafish larvae, accompanied by dose-dependent increase in deformity and mortality rates, as well as exacerbated apoptosis. ABM exposure led to deformities in the ceratobranchial (cb) and hyosymplectic (hs), accompanied by significant increases in the length of the palatoquadrate (pq). Furthermore, significant decreases in the CH-CH angle, Meckel's-Meckel's angle, and Meckel's-PQ angle were noted. Even at the safe concentration of 5 μg/L (1/10 of the 96 h LC50), ABM delayed the process of bone mineralization in zebrafish larvae. Real-time fluorescent quantitative PCR results demonstrated that ABM induced differential gene expression associated with cartilage and bone development in zebrafish. Thus, this study provides preliminary insights into the effects and molecular mechanisms underlying ABM's impact on the bone development of zebrafish larvae and offers new evidence for a better understanding of its toxicity.
Collapse
Affiliation(s)
- Yuting Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Jiawen He
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou 225009, China
| | - Min Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Jiawen Xu
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Hui Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
| | - Yingying Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| |
Collapse
|
2
|
Amroodi MN, Maghsoudloo M, Amiri S, Mokhtari K, Mohseni P, Pourmarjani A, Jamali B, Khosroshahi EM, Asadi S, Tabrizian P, Entezari M, Hashemi M, Wan R. Unraveling the molecular and immunological landscape: Exploring signaling pathways in osteoporosis. Biomed Pharmacother 2024; 177:116954. [PMID: 38906027 DOI: 10.1016/j.biopha.2024.116954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 06/05/2024] [Accepted: 06/15/2024] [Indexed: 06/23/2024] Open
Abstract
Osteoporosis, characterized by compromised bone density and microarchitecture, represents a significant global health challenge, particularly in aging populations. This comprehensive review delves into the intricate signaling pathways implicated in the pathogenesis of osteoporosis, providing valuable insights into the pivotal role of signal transduction in maintaining bone homeostasis. The exploration encompasses cellular signaling pathways such as Wnt, Notch, JAK/STAT, NF-κB, and TGF-β, all of which play crucial roles in bone remodeling. The dysregulation of these pathways is a contributing factor to osteoporosis, necessitating a profound understanding of their complexities to unveil the molecular mechanisms underlying bone loss. The review highlights the pathological significance of disrupted signaling in osteoporosis, emphasizing how these deviations impact the functionality of osteoblasts and osteoclasts, ultimately resulting in heightened bone resorption and compromised bone formation. A nuanced analysis of the intricate crosstalk between these pathways is provided to underscore their relevance in the pathophysiology of osteoporosis. Furthermore, the study addresses some of the most crucial long non-coding RNAs (lncRNAs) associated with osteoporosis, adding an additional layer of academic depth to the exploration of immune system involvement in various types of osteoporosis. Finally, we propose that SKP1 can serve as a potential biomarker in osteoporosis.
Collapse
Affiliation(s)
- Morteza Nakhaei Amroodi
- Bone and Joint Reconstruction Research Center, Shafa Orthopedic Hospital, department of orthopedic, school of medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mazaher Maghsoudloo
- Key Laboratory of Epigenetics and Oncology, the Research Center for Preclinical Medicine, Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Shayan Amiri
- Bone and Joint Reconstruction Research Center, Shafa Orthopedic Hospital, department of orthopedic, school of medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Khatere Mokhtari
- Department of Cellular and Molecular Biology and Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Parnaz Mohseni
- Department of Pediatrics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Azadeh Pourmarjani
- Department of Pediatrics, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Behdokht Jamali
- Department of microbiology and genetics, kherad Institute of higher education, Busheher, lran
| | - Elaheh Mohandesi Khosroshahi
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Department of Genetics, Faculty of Advanced Science and Technology Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Saba Asadi
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Department of Genetics, Faculty of Advanced Science and Technology Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Pouria Tabrizian
- Bone and Joint Reconstruction Research Center, Shafa Orthopedic Hospital, department of orthopedic, school of medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Maliheh Entezari
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Department of Genetics, Faculty of Advanced Science and Technology Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Mehrdad Hashemi
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Department of Genetics, Faculty of Advanced Science and Technology Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Runlan Wan
- Department of Oncology, The Affiliated Hospital, Southwest Medical University, Luzhou 646000, China; Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, (Collaborative Innovation Center for Prevention of Cardiovascular Diseases), Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China.
| |
Collapse
|
3
|
Feng J, Zhang Q, Pu F, Zhu Z, Lu K, Lu WW, Tong L, Yu H, Chen D. Signalling interaction between β-catenin and other signalling molecules during osteoarthritis development. Cell Prolif 2024; 57:e13600. [PMID: 38199244 PMCID: PMC11150147 DOI: 10.1111/cpr.13600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/29/2023] [Accepted: 12/29/2023] [Indexed: 01/12/2024] Open
Abstract
Osteoarthritis (OA) is the most prevalent disorder of synovial joint affecting multiple joints. In the past decade, we have witnessed conceptual switch of OA pathogenesis from a 'wear and tear' disease to a disease affecting entire joint. Extensive studies have been conducted to understand the underlying mechanisms of OA using genetic mouse models and ex vivo joint tissues derived from individuals with OA. These studies revealed that multiple signalling pathways are involved in OA development, including the canonical Wnt/β-catenin signalling and its interaction with other signalling pathways, such as transforming growth factor β (TGF-β), bone morphogenic protein (BMP), Indian Hedgehog (Ihh), nuclear factor κB (NF-κB), fibroblast growth factor (FGF), and Notch. The identification of signalling interaction and underlying mechanisms are currently underway and the specific molecule(s) and key signalling pathway(s) playing a decisive role in OA development need to be evaluated. This review will focus on recent progresses in understanding of the critical role of Wnt/β-catenin signalling in OA pathogenesis and interaction of β-catenin with other pathways, such as TGF-β, BMP, Notch, Ihh, NF-κB, and FGF. Understanding of these novel insights into the interaction of β-catenin with other pathways and its integration into a complex gene regulatory network during OA development will help us identify the key signalling pathway of OA pathogenesis leading to the discovery of novel therapeutic strategies for OA intervention.
Collapse
Affiliation(s)
- Jing Feng
- Department of Orthopedics, Traditional Chinese and Western Medicine Hospital of WuhanTongji Medical College, Huazhong University of Science and TechnologyWuhanHubeiChina
- Department of OrthopedicsWuhan No. 1 HospitalWuhanHubeiChina
| | - Qing Zhang
- Department of EmergencyRenmin Hospital, Wuhan UniversityWuhanHubeiChina
| | - Feifei Pu
- Department of Orthopedics, Traditional Chinese and Western Medicine Hospital of WuhanTongji Medical College, Huazhong University of Science and TechnologyWuhanHubeiChina
- Department of OrthopedicsWuhan No. 1 HospitalWuhanHubeiChina
| | - Zhenglin Zhu
- Department of Orthopedic Surgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Ke Lu
- Faculty of Pharmaceutical SciencesShenzhen Institute of Advanced TechnologyShenzhenChina
- Research Center for Computer‐aided Drug DiscoveryShenzhen Institute of Advanced Technology, Chinese Academy of SciencesShenzhenChina
| | - William W. Lu
- Faculty of Pharmaceutical SciencesShenzhen Institute of Advanced TechnologyShenzhenChina
| | - Liping Tong
- Research Center for Computer‐aided Drug DiscoveryShenzhen Institute of Advanced Technology, Chinese Academy of SciencesShenzhenChina
| | - Huan Yu
- Department of Orthopedics, Traditional Chinese and Western Medicine Hospital of WuhanTongji Medical College, Huazhong University of Science and TechnologyWuhanHubeiChina
- Department of OrthopedicsWuhan No. 1 HospitalWuhanHubeiChina
| | - Di Chen
- Faculty of Pharmaceutical SciencesShenzhen Institute of Advanced TechnologyShenzhenChina
- Research Center for Computer‐aided Drug DiscoveryShenzhen Institute of Advanced Technology, Chinese Academy of SciencesShenzhenChina
| |
Collapse
|
4
|
Yang G(K, Chen H, Cheng KL, Tang MF, Wang Y, Hung LH(A, Cheng CY(J, Mak KL(K, Lee YW(W. Potential Interaction between WNT16 and Vitamin D on Bone Qualities in Adolescent Idiopathic Scoliosis Patients and Healthy Controls. Biomedicines 2024; 12:250. [PMID: 38275421 PMCID: PMC10813331 DOI: 10.3390/biomedicines12010250] [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: 10/05/2023] [Revised: 01/01/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024] Open
Abstract
Adolescent idiopathic scoliosis (AIS) is a three-dimensional spinal deformity that is associated with low bone mineral density (BMD). Vitamin D (Vit-D) supplementation has been suggested to improve BMD in AIS, and its outcomes may be related to genetic factors. The present study aimed to (a) investigate the synergistic effect between a low BMD-related gene (wingless-related integration site 16, WNT16) and two important Vit-D pathway genes (Vit-D receptor, VDR, and Vit-D binding protein, VDBP) on serum Vit-D and bone qualities in Chinese AIS patients and healthy adolescents, and (b) to further investigate the effect of ablating Wnt16 on the cortical bone quality and whether diets with different dosages of Vit-D would further influence bone quality during the rapid growth phase in mice in the absence of Wnt16. A total of 519 girls (318 AIS vs. 201 controls) were recruited, and three selected single-nucleotide polymorphisms (SNPs) (WNT16 rs3801387, VDBP rs2282679, and VDR rs2228570) were genotyped. The serum 25(OH)Vit-D level was significantly associated with VDBP rs2282679 alleles (OR = -4.844; 95% CI, -7.521 to -2.167, p < 0.001). Significant multi-locus models were identified by generalized multifactor dimensionality reduction (GMDR) analyses on the serum 25(OH)Vit-D level (p = 0.006) and trabecular area (p = 0.044). In the gene-edited animal study, Wnt16 global knockout (KO) and wildtype (WT) male mice were provided with different Vit-D diets (control chow (1000 IU/Kg) vs. Vit-D-deficient chow (Nil in Vit-D) vs. high-dose Vit-D chow (20,000 IU/Kg)) from 4 weeks to 10 weeks old. Wnt16 global KO mice had significantly lower serum 25(OH)Vit-D levels and higher liver Vdbp mRNA expression levels than WT mice. In addition, Wnt16 global KO mice showed a decrease in bone density, cortical thickness and cortical area compared with WT mice. Interestingly, high-dose Vit-D chow led to lower bone density, cortical thickness, and cortical area in WT mice, which were less obvious in Wnt16 global KO mice. In conclusion, WNT16 may regulate the serum 25(OH)Vit-D level and bone qualities, which might be associated with VDBP expression. Further investigations with a larger sample size and wider spectrum of scoliosis severity are required to validate our findings regarding the interaction between WNT16 and Vit-D status in patients with AIS.
Collapse
Affiliation(s)
- Guangpu (Kenneth) Yang
- SH Ho Scoliosis Research Laboratory, Joint Scoliosis Research Centre of the Chinese University of Hong Kong and Nanjing University, The Chinese University of Hong Kong, Hong Kong, China
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Huanxiong Chen
- SH Ho Scoliosis Research Laboratory, Joint Scoliosis Research Centre of the Chinese University of Hong Kong and Nanjing University, The Chinese University of Hong Kong, Hong Kong, China
- Department of Spine Surgery, The First Affiliated Hospital of Hainan Medical University, Haikou 571199, China
| | - Ka-Lo Cheng
- SH Ho Scoliosis Research Laboratory, Joint Scoliosis Research Centre of the Chinese University of Hong Kong and Nanjing University, The Chinese University of Hong Kong, Hong Kong, China
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Man-Fung Tang
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong, China
| | - Yujia Wang
- SH Ho Scoliosis Research Laboratory, Joint Scoliosis Research Centre of the Chinese University of Hong Kong and Nanjing University, The Chinese University of Hong Kong, Hong Kong, China
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | - Lik-Hang (Alec) Hung
- SH Ho Scoliosis Research Laboratory, Joint Scoliosis Research Centre of the Chinese University of Hong Kong and Nanjing University, The Chinese University of Hong Kong, Hong Kong, China
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
- Department of Orthopaedics and Traumatology, Prince of Wales Hospital, Hong Kong, China
| | - Chun-Yiu (Jack) Cheng
- SH Ho Scoliosis Research Laboratory, Joint Scoliosis Research Centre of the Chinese University of Hong Kong and Nanjing University, The Chinese University of Hong Kong, Hong Kong, China
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
| | | | - Yuk-Wai (Wayne) Lee
- SH Ho Scoliosis Research Laboratory, Joint Scoliosis Research Centre of the Chinese University of Hong Kong and Nanjing University, The Chinese University of Hong Kong, Hong Kong, China
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong, China
- Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
| |
Collapse
|
5
|
Behrmann A, Zhong D, Li L, Xie S, Mead M, Sabaeifard P, Goodarzi M, Lemoff A, Kozlitina J, Towler DA. Wnt16 Promotes Vascular Smooth Muscle Contractile Phenotype and Function via Taz (Wwtr1) Activation in Male LDLR-/- Mice. Endocrinology 2023; 165:bqad192. [PMID: 38123514 PMCID: PMC10765280 DOI: 10.1210/endocr/bqad192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/30/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023]
Abstract
Wnt16 is expressed in bone and arteries, and maintains bone mass in mice and humans, but its role in cardiovascular physiology is unknown. We show that Wnt16 protein accumulates in murine and human vascular smooth muscle (VSM). WNT16 genotypes that convey risk for bone frailty also convey risk for cardiovascular events in the Dallas Heart Study. Murine Wnt16 deficiency, which causes postnatal bone loss, also reduced systolic blood pressure. Electron microscopy demonstrated abnormal VSM mitochondrial morphology in Wnt16-null mice, with reductions in mitochondrial respiration. Following angiotensin-II (AngII) infusion, thoracic ascending aorta (TAA) dilatation was greater in Wnt16-/- vs Wnt16+/+ mice (LDLR-/- background). Acta2 (vascular smooth muscle alpha actin) deficiency has been shown to impair contractile phenotype and worsen TAA aneurysm with concomitant reductions in blood pressure. Wnt16 deficiency reduced expression of Acta2, SM22 (transgelin), and other contractile genes, and reduced VSM contraction induced by TGFβ. Acta2 and SM22 proteins were reduced in Wnt16-/- VSM as was Ankrd1, a prototypic contractile target of Yap1 and Taz activation via TEA domain (TEAD)-directed transcription. Wnt16-/- VSM exhibited reduced nuclear Taz and Yap1 protein accumulation. SiRNA targeting Wnt16 or Taz, but not Yap1, phenocopied Wnt16 deficiency, and Taz siRNA inhibited contractile gene upregulation by Wnt16. Wnt16 incubation stimulated mitochondrial respiration and contraction (reversed by verteporfin, a Yap/Taz inhibitor). SiRNA targeting Taz inhibitors Ccm2 and Lats1/2 mimicked Wnt16 treatment. Wnt16 stimulated Taz binding to Acta2 chromatin and H3K4me3 methylation. TEAD cognates in the Acta2 promoter conveyed transcriptional responses to Wnt16 and Taz. Wnt16 regulates cardiovascular physiology and VSM contractile phenotype, mediated via Taz signaling.
Collapse
Affiliation(s)
- Abraham Behrmann
- Internal Medicine—Endocrine Division and the Pak Center for Mineral Metabolism and Clinical Research, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Dalian Zhong
- Internal Medicine—Endocrine Division and the Pak Center for Mineral Metabolism and Clinical Research, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Li Li
- Internal Medicine—Endocrine Division and the Pak Center for Mineral Metabolism and Clinical Research, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Shangkui Xie
- Internal Medicine—Endocrine Division and the Pak Center for Mineral Metabolism and Clinical Research, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Megan Mead
- Internal Medicine—Endocrine Division and the Pak Center for Mineral Metabolism and Clinical Research, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Parastoo Sabaeifard
- Internal Medicine—Endocrine Division and the Pak Center for Mineral Metabolism and Clinical Research, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | | | - Andrew Lemoff
- Biochemistry, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Julia Kozlitina
- McDermott Center for Human Development, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Dwight A Towler
- Internal Medicine—Endocrine Division and the Pak Center for Mineral Metabolism and Clinical Research, UT Southwestern Medical Center, Dallas, TX 75390, USA
| |
Collapse
|
6
|
Kragl A, Hannemann A, Nauck M, Völker U, Siggelkow H, Teumer A, Tzvetkov MV. Genetic Variants in WNT16 and PKD2L1 Locus Affect Heel Ultrasound Bone Stiffness: Analyses from the General Population and Patients Evaluated for Osteoporosis. Calcif Tissue Int 2023; 113:540-551. [PMID: 37831088 PMCID: PMC10618371 DOI: 10.1007/s00223-023-01141-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 09/15/2023] [Indexed: 10/14/2023]
Abstract
Osteoporosis, a complex chronic disease with increasing prevalence, is characterised by reduced bone mineral density (BMD) and increased fracture risk. The high heritability of BMD suggests substantial impact of the individual genetic disposition on bone phenotypes and the development of osteoporosis. In the past years, genome-wide association studies (GWAS) identified hundreds of genetic variants associated with BMD or osteoporosis. Here, we analysed 1103 single nucleotide polymorphisms (SNPs), previously identified as associated with estimated BMD (eBMD) in the UK Biobank. We assessed whether these SNPs are related to heel stiffness index obtained by quantitative ultrasound in 5665 adult participants of the Study of Health in Pomerania (SHIP). We confirmed 45 significant associations after correction for multiple testing. Next, we analysed six selected SNPs in 631 patients evaluated for osteoporosis [rs2707518 (CPED1/WNT16), rs3779381 (WNT16), rs115242848 (LOC101927709/EN1), rs10239787 (JAZF1), rs603424 (PKD2L1) and rs6968704 (JAZF1)]. Differences in minor allele frequencies (MAF) of rs2707518 and rs3779381 between SHIP participants (higher MAF) and patients evaluated for osteoporosis (lower MAF) indicated a protective effect of the minor allele on bone integrity. In contrast, differences in MAF of rs603424 indicated a harmful effect. Co-localisation analyses indicated that the rs603424 effect may be mediated via stearoyl-CoA desaturase (SCD) expression, an enzyme highly expressed in adipose tissue with a crucial role in lipogenesis. Taken together, our results support the role of the WNT16 pathway in the regulation of bone properties and indicate a novel causal role of SCD expression in adipose tissue on bone integrity.
Collapse
Affiliation(s)
- Angelique Kragl
- Institute of Pharmacology, Center of Drug Absorption and Transport (C_DAT), University Medicine Greifswald, Greifswald, Germany
| | - Anke Hannemann
- Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Greifswald, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Greifswald, University Medicine, Greifswald, Germany
| | - Matthias Nauck
- Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Greifswald, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Greifswald, University Medicine, Greifswald, Germany
| | - Uwe Völker
- DZHK (German Centre for Cardiovascular Research), Partner Site Greifswald, University Medicine, Greifswald, Germany
- Interfaculty Institute of Genetics and Functional Genomics, Department Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Heide Siggelkow
- MVZ Endokrinologikum Goettingen, Goettingen, Germany
- Clinic of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, Goettingen, Germany
| | - Alexander Teumer
- DZHK (German Centre for Cardiovascular Research), Partner Site Greifswald, University Medicine, Greifswald, Germany
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - Mladen V Tzvetkov
- Institute of Pharmacology, Center of Drug Absorption and Transport (C_DAT), University Medicine Greifswald, Greifswald, Germany.
| |
Collapse
|
7
|
Zhivodernikov IV, Kirichenko TV, Markina YV, Postnov AY, Markin AM. Molecular and Cellular Mechanisms of Osteoporosis. Int J Mol Sci 2023; 24:15772. [PMID: 37958752 PMCID: PMC10648156 DOI: 10.3390/ijms242115772] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/26/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023] Open
Abstract
Osteoporosis is a widespread systemic disease characterized by a decrease in bone mass and an imbalance of the microarchitecture of bone tissue. Experimental and clinical studies devoted to investigating the main pathogenetic mechanisms of osteoporosis revealed the important role of estrogen deficiency, inflammation, oxidative stress, cellular senescence, and epigenetic factors in the development of bone resorption due to osteoclastogenesis, and decreased mineralization of bone tissue and bone formation due to reduced function of osteoblasts caused by apoptosis and age-depended differentiation of osteoblast precursors into adipocytes. The current review was conducted to describe the basic mechanisms of the development of osteoporosis at molecular and cellular levels and to elucidate the most promising therapeutic strategies of pathogenetic therapy of osteoporosis based on articles cited in PubMed up to September 2023.
Collapse
Affiliation(s)
| | | | - Yuliya V. Markina
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, Petrovsky National Research Centre of Surgery, 119991 Moscow, Russia; (I.V.Z.); (T.V.K.); (A.Y.P.); (A.M.M.)
| | | | | |
Collapse
|
8
|
Gómez AE, Addish S, Alvarado K, Boatemaa P, Onyali AC, Ramirez EG, Rojas MF, Rai J, Reynolds KA, Tang WJ, Kwon RY. Multiple Mechanisms Explain Genetic Effects at the CPED1-WNT16 Bone Mineral Density Locus. Curr Osteoporos Rep 2023; 21:173-183. [PMID: 36943599 PMCID: PMC10202127 DOI: 10.1007/s11914-023-00783-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/07/2023] [Indexed: 03/23/2023]
Abstract
PURPOSE OF REVIEW Chromosome region 7q31.31, also known as the CPED1-WNT16 locus, is robustly associated with BMD and fracture risk. The aim of the review is to highlight experimental studies examining the function of genes at the CPED1-WNT16 locus. RECENT FINDINGS Genes that reside at the CPED1-WNT16 locus include WNT16, FAM3C, ING3, CPED1, and TSPAN12. Experimental studies in mice strongly support the notion that Wnt16 is necessary for bone mass and strength. In addition, roles for Fam3c and Ing3 in regulating bone morphology in vivo and/or osteoblast differentiation in vitro have been identified. Finally, a role for wnt16 in dually influencing bone and muscle morphogenesis in zebrafish has recently been discovered, which has brought forth new questions related to whether the influence of WNT16 in muscle may conspire with its influence in bone to alter BMD and fracture risk.
Collapse
Affiliation(s)
- Arianna Ericka Gómez
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Sumaya Addish
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Kurtis Alvarado
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Priscilla Boatemaa
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Anne C Onyali
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Emily G Ramirez
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Maria F Rojas
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Jyoti Rai
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Kiana A Reynolds
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - W Joyce Tang
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Ronald Young Kwon
- Department of Orthopaedics and Sports Medicine, University of Washington School of Medicine, Seattle, WA, USA.
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA.
| |
Collapse
|
9
|
Wu CL, Nfor ON, Tantoh DM, Lu WY, Liaw YP. Associations Between Body Mass Index, WNT16 rs2908004 and Osteoporosis: Findings from Taiwan Biobank. J Multidiscip Healthc 2022; 15:2751-2758. [PMID: 36510504 PMCID: PMC9738159 DOI: 10.2147/jmdh.s391587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 11/24/2022] [Indexed: 12/09/2022] Open
Abstract
Purpose Osteoporosis is a degenerative disease that affects women and men of all races. We studied the association between body mass index (BMI), rs2908004 polymorphism of the WNT16 gene, and osteoporosis using data from Taiwan Biobank (TWB). Patients and Methods We analyzed data from 10,942 subjects aged 30 to 70. We defined osteoporosis based on a mean T-score of -2.5 and below in the hip. Body mass index was classified following the guidelines of the Health Promotion Administration. Imputation was carried out using the IMPUTE2 (v2.3.1) program. Multiple logistic regression was used for analysis. The odds ratios (ORs) and 95% confidence interval (CI) for osteoporosis were determined. Results In the multivariate regression model, variant rs2908004 had a significant association with osteoporosis. That is, the rs2908004-GA+AA genotype was associated with lower osteoporosis risk than the GG genotype (OR, 0.651; 95% CI = 0.544 to 0.780). Compared to normal-weight, underweight was significantly associated with a higher risk of osteoporosis (OR, 6.517; 95% CI = 4.624 to 9.186) while overweight and obesity were protective (OR, 0.176; 95% CI = 0.140 to 0.221 and 0.057; 95% CI = 0.039 to 0.083, respectively). There was an interaction between rs2908004 and BMI (p = 0.0148). Subgroup analyses (using rs2908004-GG/normal-weight as the reference group) indicated ORs of 7.66 (95% CI = 5.153 to 11.394) in the rs2908004-GG/underweight group and 3.002 (95% CI = 1.509 to 5.974) in the rs2908004-GA+AA/underweight group (95% CI = 1.509 to 5.974). Odds ratios were substantially lower in rs2908004-GG/obese, rs2908004-GG/overweight, GA+AA/normal-weight, rs2908004-GA+AA/overweight, and rs2908004-GA+AA/obese groups, respectively. Conclusion According to our study, underweight was associated with an increased risk of osteoporosis irrespective of WNT16 rs2908004 genotypes, while overweight and obesity were associated with a lower risk.
Collapse
Affiliation(s)
- Chi-Ling Wu
- Department of Public Health, Institute of Public Health, Chung Shan Medical University, Taichung City, Taiwan
| | - Oswald Ndi Nfor
- Department of Public Health, Institute of Public Health, Chung Shan Medical University, Taichung City, Taiwan
| | - Disline Manli Tantoh
- Department of Public Health, Institute of Public Health, Chung Shan Medical University, Taichung City, Taiwan
- Department of Medical Imaging, Chung Shan Medical University Hospital, Taichung City, Taiwan
| | - Wen-Yu Lu
- Department of Public Health, Institute of Public Health, Chung Shan Medical University, Taichung City, Taiwan
| | - Yung-Po Liaw
- Department of Public Health, Institute of Public Health, Chung Shan Medical University, Taichung City, Taiwan
- Department of Medical Imaging, Chung Shan Medical University Hospital, Taichung City, Taiwan
- Institute of Medicine, Chung Shan Medical University, Taichung City, Taiwan
| |
Collapse
|
10
|
Puente N, Vega AI, Hernandez JL, Fernandez-Luna JL, Riancho JA. An LRP6 mutation (Arg360His) associated with low bone mineral density but not cardiovascular events in a Caucasian family. Osteoporos Int 2022; 33:2445-2448. [PMID: 35840698 PMCID: PMC9568478 DOI: 10.1007/s00198-022-06494-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 07/04/2022] [Indexed: 11/29/2022]
Abstract
UNLABELLED We present a family with a rare mutation of the LRP6 gene and for the first time provide evidence for its association with low bone mineral density. INTRODUCTION The Wnt pathway plays a critical role in bone homeostasis. Pathogenic variants of the Wnt co-receptor LRP6 have been associated with abnormal skeletal phenotypes or increased risk of cardiovascular events. PATIENT AND METHODS Here we report an index premenopausal patient and her family carrying a rare missense LRP6 pathogenic variant (rs141212743; 0.0002 frequency among Europeans). This variant has been previously associated with metabolic syndrome and atherosclerosis, in the presence of normal bone mineral density. However, the LRP6 variant was associated with low bone mineral density in this family, without evidence for association with serum lipid levels or cardiovascular events. CONCLUSION Thus, this novel association shows that LRP6 pathogenic variants may be involved in some cases of early-onset osteoporosis, but the predominant effect, either skeletal or cardiovascular, may vary depending on the genetic background or other acquired factors.
Collapse
Affiliation(s)
- Nuria Puente
- Servicio de Medicina Interna, Hospital UM Valdecilla, Universidad de Cantabria, IDIVAL, Avda Valdecilla sn, 39008, Santander, Spain
| | - Ana I Vega
- Servicio de Genética, Hospital UM Valdecilla, IDIVAL, Santander, Spain
| | - José L Hernandez
- Servicio de Medicina Interna, Hospital UM Valdecilla, Universidad de Cantabria, IDIVAL, Avda Valdecilla sn, 39008, Santander, Spain
| | | | - Jose A Riancho
- Servicio de Medicina Interna, Hospital UM Valdecilla, Universidad de Cantabria, IDIVAL, Avda Valdecilla sn, 39008, Santander, Spain.
| |
Collapse
|
11
|
Lu T, Forgetta V, Greenwood CMT, Richards JB. Identifying Causes of Fracture Beyond Bone Mineral Density: Evidence From Human Genetics. J Bone Miner Res 2022; 37:1592-1602. [PMID: 35689460 DOI: 10.1002/jbmr.4632] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 05/28/2022] [Accepted: 06/04/2022] [Indexed: 11/10/2022]
Abstract
New therapies may help to prevent osteoporotic fractures other than through increasing bone mineral density (BMD). Because fracture risk has an important genetic component, we aim to identify loci increasing fracture risk that do not decrease BMD, using a recently-proposed structural equation model adapted to remove genetic influences of BMD on fracture risk. We used summary statistics of the largest genome-wide association studies (GWASs) for BMD and for fracture in these analyses. We next estimated the genetic correlation between the non-BMD or BMD-related genetic effects and other clinical risk factors for fracture. Last, based on white British participants in the UK Biobank, we conducted genetic risk score analyses to assess whether the aggregated genetic effects conferred increased major osteoporotic fracture risk. We found that only three loci affecting fracture risk exhibited genetic effects not mediated by BMD: SOST, CPED1-WNT16, and RSPO3, while these three loci simultaneously conferred BMD-related effects. No strong genetic associations between non-BMD or BMD-related effects and 16 clinical risk factors were observed. However, non-BMD effects might be genetic correlated with hip bone size. In the UK Biobank, a 1 standard deviation (1-SD) increase in the non-BMD genetic risk score conferred an odds ratio of 1.17 for incident major osteoporotic fracture, compared to 1.29 by a BMD-related genetic risk score. Our study suggests that the majority of common genetic predisposition toward fracture risk acts upon BMD. Although non-BMD genetic effects may exist, they are not strongly correlated with most traditional clinical risk factors. Risk loci harboring non-BMD genetic effects may influence other perspectives of bone quality, or confer effects that existing GWASs fail to capture, but they demonstrate weaker impact on fracture risk than BMD-related genetic effects. These findings suggest that most successful drug development programs for osteoporosis should focus on pathways identified through BMD-associated loci. © 2022 American Society for Bone and Mineral Research (ASBMR).
Collapse
Affiliation(s)
- Tianyuan Lu
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Canada.,Quantitative Life Sciences Program, McGill University, Montreal, Canada
| | - Vincenzo Forgetta
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Canada
| | - Celia M T Greenwood
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Canada.,Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Canada.,Gerald Bronfman Department of Oncology, McGill University, Montreal, Canada.,Department of Human Genetics, McGill University, Montreal, Canada
| | - J Brent Richards
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Canada.,Department of Human Genetics, McGill University, Montreal, Canada.,Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| |
Collapse
|
12
|
Yang Z, Liu J, Fu J, Li S, Chai Z, Sun Y. Associations between WNT signaling pathway-related gene polymorphisms and risks of osteoporosis development in Chinese postmenopausal women: a case-control study. Climacteric 2022; 25:257-263. [PMID: 34254535 DOI: 10.1080/13697137.2021.1941848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 05/11/2021] [Accepted: 06/02/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND The WNT signaling pathway is involved in the regulation of bone homeostasis, and the effect of WNT signaling pathway-related gene (WNT16 and LRP5) polymorphisms on osteoporosis risk among Chinese postmenopausal women is still unknown. Hence, we performed a case-control study to assess the association of WNT signaling pathway-related gene polymorphisms and osteoporosis risk. METHODS A total of 1026 women (515 osteoporosis patients and 511 controls) of postmenopausal age who were randomly sampled from Xi'an 630 Hospital (Shaanxi Province, China) were involved in this study. Seven genetic polymorphisms in WNT16 (rs3779381, rs3801387, rs917727 and rs7776725) and LRP5 (rs2291467, rs11228240 and rs12272917) were selected and genotyped using the Agena MassARRAY iPLEX system. The association of the genetic polymorphisms and osteoporosis risk was assessed by odds ratios and 95% confidence intervals. The multifactor dimensionality reduction (MDR) method was conducted to analyze single nucleotide polymorphism (SNP)-SNP interaction. RESULTS We found that LRP5 polymorphisms (rs2291467, rs11228240 and rs12272917) were significantly associated with a decreased risk of osteoporosis in homozygote, recessive and additive models (p < 0.05). Stratification analysis showed that LRP5 polymorphisms (rs2291467, rs11228240 and rs12272917) significantly decreased the osteoporosis risk in the subgroup of body mass index (BMI) ≤ 24 (p < 0.05) and that individuals carrying a heterozygote genotype of WNT16 polymorphisms (rs3779381, rs3801387, rs917727 and rs7776725) had a higher osteoporosis risk in the subgroup of BMI > 24 (p < 0.05). Two haplotypes (haplotype 1: rs3779381, rs3801387, rs917727 and rs7776725; haplotype 2: rs2291467 and rs11228240) were observed, yet only Trs2291467Trs11228240 and Crs2291467Crs11228240 had a strong association with a decreased risk of osteoporosis (p < 0.05). Additionally, MDR analysis revealed that LRP5 rs2291467 was the best model in single-locus MDR analysis. A seven-locus model including rs3779381-AG, rs7776725-TC, rs3801387-GA and rs917727-TC in WNT16 and rs11228240-CC, rs12272917-TC and rs2291467-CC in LRP5 was the best model in multiple-loci MDR analysis (p < 0.001). These two best models were the most significantly associated with osteoporosis risk. CONCLUSIONS Our findings suggested that WNT16 and LRP5 genetic polymorphisms are associated with osteoporosis risk among Chinese postmenopausal women.
Collapse
Affiliation(s)
- Z Yang
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - J Liu
- Department of Internal Neurology, Inner Mongolia Medical University Affiliated Hospital, Hohhot, China
| | - J Fu
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - S Li
- Department of Minimal Invasive Spine Surgery, The Second Affiliated Hospital of Inner Mongolia Medical College, Hohhot, China
| | - Z Chai
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Y Sun
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| |
Collapse
|
13
|
Genetic variation in WNT16 and its association with bone mineral density, fractures and osteoporosis in children with bone fragility. Bone Rep 2022; 16:101525. [PMID: 35535173 PMCID: PMC9077160 DOI: 10.1016/j.bonr.2022.101525] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 03/24/2022] [Accepted: 03/24/2022] [Indexed: 11/20/2022] Open
Abstract
Several genome-wide association studies (GWAS), GWAS meta-analyses, and mouse studies have demonstrated that wingless-related integration site 16 (WNT16) gene is associated with bone mineral density (BMD), cortical bone thickness, bone strength and fracture risk. Practically no data exist regarding the significance of WNT16 in childhood-onset osteoporosis and related fractures. We hypothesized that pathogenic variants and genetic variations in WNT16 could explain skeletal fragility in affected children. We screened the WNT16 gene by Sanger sequencing in three pediatric cohorts: 35 with primary osteoporosis, 59 with multiple fractures, and in 95 healthy controls. Altogether, we identified 12 variants in WNT16. Of them one was a rare 5′UTR variant rs1386898215 in genome aggregate and medical trans-omic databases (GnomAD, TOPMED; minor allele frequency (MAF) 0.00 and 0.000008, respectively). One variant rs1554366753, overrepresented in children with osteoporosis (MAF = 0.06 vs healthy controls MAF = 0.01), was significantly associated with lower BMD. This variant was found associated with increased WNT16 gene expression at mRNA level in fibroblast cultures. None of the other identified variants were rare (MAF < 0.001) or deemed pathogenic by predictor programs. WNT16 may play a role in childhood osteoporosis but genetic WNT16 variation is not a common cause of skeletal fragility in childhood. No pathogenic WNT16 variants were found associated with pediatric osteoporosis or fracture-prone patients Altogether, twelve WNT16 variants were found in pediatric osteoporosis or fracture-prone patients The genetic variation rs1554366753 in the WNT16 gene is associated with bone mineral density and primary osteoporosis
Collapse
|
14
|
Katchkovsky S, Chatterjee B, Abramovitch-Dahan CV, Papo N, Levaot N. Competitive blocking of LRP4-sclerostin binding interface strongly promotes bone anabolic functions. Cell Mol Life Sci 2022; 79:113. [PMID: 35099616 PMCID: PMC11073160 DOI: 10.1007/s00018-022-04127-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/16/2021] [Accepted: 01/03/2022] [Indexed: 01/07/2023]
Abstract
Induction of bone formation by Wnt ligands is inhibited when sclerostin (Scl), an osteocyte-produced antagonist, binds to its receptors, the low-density lipoprotein receptor-related proteins 5 or 6 (LRP5/6). Recently, it was shown that enhanced inhibition is achieved by Scl binding to the co-receptor LRP4. However, it is not clear if the binding of Scl to LRP4 facilitates Scl binding to LRP5/6 or inhibits the Wnt pathway in an LRP5/6-independent manner. Here, using the yeast display system, we demonstrate that Scl exhibits a stronger binding affinity for LRP4 than for LRP6. Moreover, we found stronger Scl binding to LRP6 in the presence of LRP4. We further show that a Scl mutant (SclN93A), which tightly binds LRP4 but not LRP6, does not inhibit the Wnt pathway on its own. We demonstrate that SclN93A competes with Scl for a common binding site on LRP4 and antagonizes Scl inhibition of the Wnt signaling pathway in osteoblasts in vitro. Finally, we demonstrate that 2 weeks of bi-weekly subcutaneous injections of SclN93A fused to the fragment crystallizable (Fc) domain of immunoglobulin (SclN93AFc), which retains the antagonistic activity of the mutant, significantly increases bone formation rate and enhances trabecular volumetric bone fraction, trabecular number, and bone length in developing mice. Our data show that LRP4 serves as an anchor that facilitates Scl-LRP6 binding and that inhibition of the Wnt pathway by Scl depends on its prior binding to LRP4. We further provide evidence that compounds that inhibit Scl-LRP4 interactions offer a potential strategy to promote anabolic bone functions.
Collapse
Affiliation(s)
- Svetlana Katchkovsky
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Biplab Chatterjee
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Chen-Viki Abramovitch-Dahan
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel
| | - Niv Papo
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering and the National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel.
| | - Noam Levaot
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel.
- Regenerative Medicine and Stem Cell Research Center, Ben-Gurion University of the Negev, 8410501, Beer-Sheva, Israel.
| |
Collapse
|
15
|
Ye X, Liu X. Wnt16 signaling in bone homeostasis and osteoarthristis. Front Endocrinol (Lausanne) 2022; 13:1095711. [PMID: 36619549 PMCID: PMC9815800 DOI: 10.3389/fendo.2022.1095711] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022] Open
Abstract
Wnts are secreted cysteine-rich glycoproteins involved in joint development and skeletal homeostasis and have been implicated in the occurrence of osteoarthritis. Over the past decade, Wnt16, a member of the Wnt family, has received widespread attention for its strong association with bone mineral density, cortical bone thickness, bone strength, and osteoporotic fracture risk. In recent years, further studies have shed light on the role of Wnt16 a positive regulator of bone mass and protective regulator of osteoarthritis progression. Transduction mechanisms and crosstalk involving Wnt16 signaling have also been illustrated. More importantly, local Wnt16 treatment has been shown to ease osteoarthritis, inhibit bone resorption, and promote new bone formation in bone defect models. Thus, Wnt16 is now a potential therapeutic target for skeletal diseases and osteoarthritis. This paper reviews our current understanding of the mechanisms by which Wnt16 signaling regulates bone homeostasis and osteoarthritis.
Collapse
|
16
|
Jo S, Weon S, Nam B, Jang MA, Kang H, Kim TJ, Park YS, Kim TH. WNT16 elevation induced cell senescence of osteoblasts in ankylosing spondylitis. Arthritis Res Ther 2021; 23:301. [PMID: 34879876 PMCID: PMC8653593 DOI: 10.1186/s13075-021-02670-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 11/06/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND WNT16 is critical for bone homeostasis, but the effect of WNT16 in ankylosing spondylitis (AS) is still unknown. Here, we investigated whether WNT16 influences bone formation and pathophysiological changes of AS in an in vitro model. METHODS The bone tissue from the facet joints was obtained from seven disease control and seven AS patients. Primary osteoprogenitor cells of the facet joints were isolated using an outgrowth method. Isolated osteoprogenitor cells from both control and AS tissues were analyzed by microarray, RT-qPCR, immunoblotting, and immunohistochemistry. The bone-forming activity of osteoprogenitor cells was assessed by various in vitro assays. β-galactosidase staining and senescence-associated secretory phenotype (SASP) using RT-qPCR were used to assess cell senescence. RESULTS In microarray analysis, WNT16 expression was significantly elevated in AS osteoprogenitor cells compared to the control. We also validated that WNT16 expression was elevated in AS-osteoprogenitor cells and human AS-bone tissues. WNT16 treatment inhibited bone formation in AS-osteoprogenitor cells but not in the control. Intriguingly, AS-osteoprogenitor cells were stained markedly with β-galactosidase for cell senescence in WNT16 treatment. Furthermore, in an H2O2 stress-induced premature senescence condition, WNT16 treatment increased cell senescence in AS-osteoprogenitor cells and WNT16 treatment under the H2O2 stress condition showed an increase in p21 protein and SASP mRNA expression. The WNT16-induced SASP expression in AS-osteoprogenitor cells was reduced in WNT16 knockdown cultures. CONCLUSION WNT16 is highly expressed in AS and WNT16 treatment facilitated cell senescence in AS-osteoprogenitor cells during osteoblast differentiation accompanied by suppression of bone formation. The identified role of WNT16 in AS could influence bone loss in AS patients.
Collapse
Affiliation(s)
- Sungsin Jo
- Hanyang University Institute for Rheumatology Research, Seoul, 04763, Republic of Korea
| | - Subin Weon
- Hanyang University Institute for Rheumatology Research, Seoul, 04763, Republic of Korea
- Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Bora Nam
- Hanyang University Institute for Rheumatology Research, Seoul, 04763, Republic of Korea
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Disease, 222-1, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
| | - Mi-Ae Jang
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonhchunhyang University College of Medicine, Bucheon, 14584, Korea
| | - Hyundeok Kang
- Department of Biomedical Systems Informatics, Brain Korea 21 PLUS project for Medical Science, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Tae-Jong Kim
- Deparment of Rheumatology, Chonnam National University Medical School and Hospital, Gwangju, 61469, Republic of Korea
| | - Ye-Soo Park
- Department of Orthopedic Surgery, Guri Hospital, Hanyang University College of Medicine, Guri, 11923, Republic of Korea
| | - Tae-Hwan Kim
- Hanyang University Institute for Rheumatology Research, Seoul, 04763, Republic of Korea.
- Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Disease, 222-1, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
| |
Collapse
|
17
|
WNT Signaling as a Therapeutic Target for Glioblastoma. Int J Mol Sci 2021; 22:ijms22168428. [PMID: 34445128 PMCID: PMC8395085 DOI: 10.3390/ijms22168428] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 12/23/2022] Open
Abstract
The WNT (Wingless/Integrated) signaling pathway is implicated in various stages of glioblastoma, which is an aggressive brain tumor for which therapeutic options are limited. WNT has been recognized as a hallmark of therapeutic challenge due to its context-dependent role and critical function in healthy tissue homeostasis. In this review, we deeply scrutinize the WNT signaling pathway and its involvement in the genesis of glioblastoma as well as its acquired therapy resistance. We also provide an analysis of the WNT pathway in terms of its therapeutic importance in addition to an overview of the current targeted therapies under clinical investigation.
Collapse
|
18
|
Isojima T, Sims NA. Cortical bone development, maintenance and porosity: genetic alterations in humans and mice influencing chondrocytes, osteoclasts, osteoblasts and osteocytes. Cell Mol Life Sci 2021; 78:5755-5773. [PMID: 34196732 PMCID: PMC11073036 DOI: 10.1007/s00018-021-03884-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 06/06/2021] [Accepted: 06/21/2021] [Indexed: 12/13/2022]
Abstract
Cortical bone structure is a crucial determinant of bone strength, yet for many years studies of novel genes and cell signalling pathways regulating bone strength have focused on the control of trabecular bone mass. Here we focus on mechanisms responsible for cortical bone development, growth, and degeneration, and describe some recently described genetic-driven modifications in humans and mice that reveal how these processes may be controlled. We start with embryonic osteogenesis of preliminary bone structures preceding the cortex and describe how this structure consolidates then matures to a dense, vascularised cortex containing an increasing proportion of lamellar bone. These processes include modelling-induced, and load-dependent, asymmetric cortical expansion, which enables the cortex's transition from a highly porous woven structure to a consolidated and thickened highly mineralised lamellar bone structure, infiltrated by vascular channels. Sex-specific differences emerge during this process. With aging, the process of consolidation reverses: cortical pores enlarge, leading to greater cortical porosity, trabecularisation and loss of bone strength. Each process requires co-ordination between bone formation, bone mineralisation, vascularisation, and bone resorption, with a need for locational-, spatial- and cell-specific signalling pathways to mediate this co-ordination. We will discuss these processes, and a number of cell-signalling pathways identified in both murine and human genetic studies to regulate cortical bone mass, including signalling through gp130, STAT3, PTHR1, WNT16, NOTCH, NOTUM and sFRP4.
Collapse
Affiliation(s)
- Tsuyoshi Isojima
- St. Vincent's Institute of Medical Research, 9 Princes St, Fitzroy, VIC, 3122, Australia
- Department of Pediatrics, Teikyo University School of Medicine, Tokyo, Japan
| | - Natalie A Sims
- St. Vincent's Institute of Medical Research, 9 Princes St, Fitzroy, VIC, 3122, Australia.
- Department of Medicine at St. Vincent's Hospital, The University of Melbourne, Fitzroy, VIC, Australia.
| |
Collapse
|
19
|
Loss of Wnt16 Leads to Skeletal Deformities and Downregulation of Bone Developmental Pathway in Zebrafish. Int J Mol Sci 2021; 22:ijms22136673. [PMID: 34206401 PMCID: PMC8268848 DOI: 10.3390/ijms22136673] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 12/21/2022] Open
Abstract
Wingless-type MMTV integration site family, member 16 (wnt16), is a wnt ligand that participates in the regulation of vertebrate skeletal development. Studies have shown that wnt16 can regulate bone metabolism, but its molecular mechanism remains largely undefined. We obtained the wnt16−/− zebrafish model using the CRISPR-Cas9-mediated gene knockout screen with 11 bp deletion in wnt16, which led to the premature termination of amino acid translation and significantly reduced wnt16 expression, thus obtaining the wnt16−/− zebrafish model. The expression of wnt16 in bone-related parts was detected via in situ hybridization. The head, spine, and tail exhibited significant deformities, and the bone mineral density and trabecular bone decreased in wnt16−/− using light microscopy and micro-CT analysis. RNA sequencing was performed to explore the differentially expressed genes (DEGs). Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis found that the down-regulated DEGs are mainly concentrated in mTOR, FoxO, and VEGF pathways. Protein–protein interaction (PPI) network analysis was performed with the detected DEGs. Eight down-regulated DEGs including akt1, bnip4, ptena, vegfaa, twsg1b, prkab1a, prkab1b, and pla2g4f.2 were validated by qRT-PCR and the results were consistent with the RNA-seq data. Overall, our work provides key insights into the influence of wnt16 gene on skeletal development.
Collapse
|
20
|
De Palma A, Nalesso G. WNT Signalling in Osteoarthritis and Its Pharmacological Targeting. Handb Exp Pharmacol 2021; 269:337-356. [PMID: 34510305 DOI: 10.1007/164_2021_525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Osteoarthritis (OA) is a highly disabling musculoskeletal condition affecting millions of people worldwide. OA is characterised by progressive destruction and irreversible morphological changes of joint tissues and architecture. At molecular level, de-regulation of several pathways contributes to the disruption of tissue homeostasis in the joint. Overactivation of the WNT/β-catenin signalling pathway has been associated with degenerative processes in OA. However, the multiple layers of complexity in the modulation of the signalling and the still insufficient knowledge of the specific molecular drivers of pathogenetic mechanisms have made difficult the pharmacological targeting of this pathway for therapeutic purposes. This review aims to provide an overview of the WNT/β-catenin signalling in OA with a particular focus on its role in the articular cartilage. Pathway components whose targeting showed therapeutic potential will be highlighted and described. A specific section will be dedicated to Lorecivivint, the first inhibitor of the β-catenin-dependent pathway currently in phase III clinical trial as OA-modifying agent.
Collapse
Affiliation(s)
- Anna De Palma
- Department of Veterinary Pre-Clinical Sciences, School of Veterinary Medicine, University of Surrey, Guildford, UK
| | - Giovanna Nalesso
- Department of Veterinary Pre-Clinical Sciences, School of Veterinary Medicine, University of Surrey, Guildford, UK.
| |
Collapse
|
21
|
Hendrickx G, Boudin E, Verbeek M, Fransen E, Mortier G, Van Hul W. WNT16 Requires Gα Subunits as Intracellular Partners for Both Its Canonical and Non-Canonical WNT Signalling Activity in Osteoblasts. Calcif Tissue Int 2020; 106:294-302. [PMID: 31760436 DOI: 10.1007/s00223-019-00633-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 11/11/2019] [Indexed: 01/08/2023]
Abstract
In the past years, WNT16 became an interesting target in the field of skeletal research, as it was identified as an essential regulator of the cortical bone compartment, with the ability to increase both cortical and trabecular bone mass and strength in vivo. Even though there are indications that these advantageous effects are coming from canonical and non-canonical WNT-signalling activity, a clear model of WNT signalling by WNT16 is not yet depicted. We, therefore, investigated the modulation of canonical (WNT/β-catenin) and non-canonical [WNT/calcium, WNT/planar cell polarity (PCP)] signalling in human embryonic kidney (HEK) 293 T and SaOS2 cells. Here, we demonstrated that WNT16 activates all WNT-signalling pathways in osteoblasts, whereas only WNT/calcium signalling was activated in HEK293T cells. In osteoblasts, we therefore, additionally investigated the role of Gα subunits as intracellular partners in WNT16's mechanism of action by performing knockdown of Gα12, Gα13 and Gαq. These studies point out that the above-mentioned Gα subunits might be involved in the WNT/β-catenin and WNT/calcium-signalling activity by WNT16 in osteoblasts, and for Gα12 in its WNT/PCP-signalling activity, illustrating a novel possible mechanism of interplay between the different WNT-signalling pathways in osteoblasts. Additional studies are needed to demonstrate whether this mechanism is specific for WNT16 signalling or relevant for all other WNT ligands as well. Altogether, we further defined WNT16's mechanism of action in osteoblasts that might underlie the well-known beneficial effects of WNT16 on skeletal homeostasis. These findings on WNT16 and the activity of specific Gα subunits in osteoblasts could definitely contribute to the development of novel therapeutic approaches for fragility fractures in the future.
Collapse
Affiliation(s)
- Gretl Hendrickx
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Eveline Boudin
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Marinus Verbeek
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Erik Fransen
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Geert Mortier
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
| | - Wim Van Hul
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium.
- Department of Medical Genetics, University of Antwerp, Prins Boudewijnlaan 43, Edegem, 2650, Antwerp, Belgium.
| |
Collapse
|
22
|
Al Anouti F, Taha Z, Shamim S, Khalaf K, Al Kaabi L, Alsafar H. An insight into the paradigms of osteoporosis: From genetics to biomechanics. Bone Rep 2019; 11:100216. [PMID: 31372373 PMCID: PMC6661363 DOI: 10.1016/j.bonr.2019.100216] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 07/03/2019] [Accepted: 07/12/2019] [Indexed: 12/22/2022] Open
Abstract
Considered as one of the major epidemics of the 21st century, osteoporosis affects approximately 200 million people globally, with significant worldwide impact on rates of morbidity and mortality and massive socioeconomic burdens. Mainly characterized by decreased bone mineral density (BMD) and increased risk of bone fragility/deterioration, this devastating silent epidemic typically has no symptoms until a fracture occurs. The multifactorial disease, osteoporosis is instigated by complex interactions between genetic, metabolic and environmental factors, with severe impact on the biomechanics of the musculoskeletal system. This article provides a review of the epidemiology, genetic and biomechanical aspects of primary osteoporosis. The review begins with a summary of the epidemiology and global prevalence of osteoporosis. Sections 1 and 2 discuss the genetic associations and molecular signaling pathways involved in normal and pathological osteogenesis while Section 3 explores the biomechanics of osteoporosis and its quantitative damaging effects on critical bone mechanical properties, and associated bone remodeling. Overall, this review summarizes the recent findings about osteoporosis and emphasizes the importance of an integrative holistic approach in investigating osteoporosis towards providing better informed, more effective preventive and treatment modalities. Importantly, this work also explores the limited available literature on the various aspects of osteoporosis in the United Arab Emirates (UAE), Gulf Cooperation Council (GCC), and Middle East despite its alarming prevalence in the region, and highlights the need for further research and studies taking into consideration the importance of the vitamin D receptor (VDR) gene influencing the development of osteoporosis.
Collapse
Affiliation(s)
- Fatme Al Anouti
- Zayed University, College of Natural and Health Sciences, Abu Dhabi, United Arab Emirates
| | - Zainab Taha
- Zayed University, College of Natural and Health Sciences, Abu Dhabi, United Arab Emirates
| | - Sadia Shamim
- Khalifa University Center for Biotechnology, Abu Dhabi, United Arab emirates
| | - Kinda Khalaf
- Khalifa University of Science & Technology, Biomedical Department, Abu Dhabi, United Arab Emirates
| | - Leena Al Kaabi
- Khalifa University of Science & Technology, Biomedical Department, Abu Dhabi, United Arab Emirates
| | - Habiba Alsafar
- Khalifa University Center for Biotechnology, Abu Dhabi, United Arab emirates.,Khalifa University of Science & Technology, Biomedical Department, Abu Dhabi, United Arab Emirates
| |
Collapse
|
23
|
Genome-wide association analysis for body weight identifies candidate genes related to development and metabolism in rainbow trout (Oncorhynchus mykiss). Mol Genet Genomics 2019; 294:563-571. [PMID: 30635785 DOI: 10.1007/s00438-018-1518-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 12/03/2018] [Indexed: 01/12/2023]
Abstract
Growth is one of the most important traits from both a physiological and economic perspective in aquaculture species. Thus, identifying the genomic regions and genes underpinning genetic variation for this trait is of particular interest in several fish species, including rainbow trout. In this work, we perform a genome-wide association study (GWAS) to identify the genomic regions associated with body weight at tagging (BWT) and at 18 months (BW18M) using a dense SNP panel (57 k) and 4596 genotyped rainbow trout from 105 full-sib families belonging to a Chilean breeding population. Analysis was performed by means of single-step GBLUP approach. Genetic variance explained by 20 adjacent SNP windows across the whole genome is reported. To further explore candidate genes, we focused on windows that explained the highest proportion of genetic variance in the top 10 chromosomes for each trait. The main window from the top 10 chromosomes was explored by BLAST using the first and last SNP position of each window to determine the target nucleotide sequence. As expected, the percentage of genetic variance explained by windows was relatively low, due to the polygenic nature of body weight. The most important genomic region for BWT and BW18M were located on chromosomes 15 and 24 and they explained 2.14% and 3.02% of the genetic variance for each trait, respectively. Candidate genes including several growth factors, genes involved in development of skeletal muscle and bone tissue and nutrient metabolism were identified within the associated regions for both traits BWT and BW18M. These results indicate that body weight is polygenic in nature in rainbow trout, with the most important loci explaining as much as 3% of the genetic variance for the trait. The genes identified here represent good candidates for further functional validation to uncover biological mechanisms underlying variation for growth in rainbow trout.
Collapse
|
24
|
Genetic Predisposition for Osteoporosis and Fractures in Postmenopausal Women. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1211:17-24. [PMID: 31309515 DOI: 10.1007/5584_2019_413] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Osteoporosis is a disease with complex etiology where the genetic factors may account for as much as 50-85% of the risk of its development in postmenopausal women. The polymorphism of estrogen receptor genes (ESR1, ESR2) seems essential among the genetic factors. The goal of this study was to analyze polymorphisms of selected genes in a population of postmenopausal women treated for osteoporosis and to evaluate the influence of genetic and nongenetic factors on the estimated 10-year risk of fracture. The study group consisted of 214 women hospitalized for treatment of postmenopausal osteoporosis. We investigated the presence of ESR1, ESR2, LRP5, and WNT16 genetic polymorphisms and the risk of fracture in each woman. The main finding was that of significant differences in the polymorphisms of the WNT16 rs2908004 genetic variant, notably, the less frequent presence of TC allele in women with a greater risk of osteoporotic fractures. We conclude that the polymorphism of the WNT16 gene seems highly relevant in the pathogenesis of osteoporosis, which makes it a promising object for further research on the genetic background of fracture risk.
Collapse
|
25
|
Mechanoactivation of Wnt/β-catenin pathways in health and disease. Emerg Top Life Sci 2018; 2:701-712. [DOI: 10.1042/etls20180042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 11/17/2022]
Abstract
Mechanical forces play an important role in regulating tissue development and homeostasis in multiple cell types including bone, joint, epithelial and vascular cells, and are also implicated in the development of diseases, e.g. osteoporosis, cardiovascular disease and osteoarthritis. Defining the mechanisms by which cells sense and respond to mechanical forces therefore has important implications for our understanding of tissue function in health and disease and may lead to the identification of targets for therapeutic intervention. Mechanoactivation of the Wnt signalling pathway was first identified in osteoblasts with a key role for β-catenin demonstrated in loading-induced osteogenesis. Since then, mechanoregulation of the Wnt pathway has also been observed in stem cells, epithelium, chondrocytes and vascular and lymphatic endothelium. Wnt can signal through both canonical and non-canonical pathways, and evidence suggests that both can mediate responses to mechanical strain, stretch and shear stress. This review will discuss our current understanding of the activation of the Wnt pathway in response to mechanical forces.
Collapse
|
26
|
Lawrence EA, Kague E, Aggleton JA, Harniman RL, Roddy KA, Hammond CL. The mechanical impact of col11a2 loss on joints; col11a2 mutant zebrafish show changes to joint development and function, which leads to early-onset osteoarthritis. Philos Trans R Soc Lond B Biol Sci 2018; 373:rstb.2017.0335. [PMID: 30249781 PMCID: PMC6158203 DOI: 10.1098/rstb.2017.0335] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2018] [Indexed: 12/12/2022] Open
Abstract
Collagen is the major structural component of cartilage, and mutations in the genes encoding type XI collagen are associated with severe skeletal dysplasias (fibrochondrogenesis and Stickler syndrome) and early-onset osteoarthritis (OA). The impact of the lack of type XI collagen on cell behaviour and mechanical performance during skeleton development is unknown. We studied a zebrafish mutant for col11a2 and evaluated cartilage, bone development and mechanical properties to address this. We show that in col11a2 mutants, type II collagen is made but is prematurely degraded in maturing cartilage and ectopically expressed in the joint. These changes are correlated with increased stiffness of both bone and cartilage; quantified using atomic force microscopy. In the mutants, the skeletal rudiment terminal region in the jaw joint is broader and the interzone smaller. These differences in shape and material properties impact on joint function and mechanical performance, which we modelled using finite element analyses. Finally, we show that col11a2 heterozygous carriers reach adulthood but show signs of severe early-onset OA. Taken together, our data demonstrate a key role for type XI collagen in maintaining the properties of cartilage matrix; which when lost leads to alterations to cell behaviour that give rise to joint pathologies.This article is part of the Theo Murphy meeting issue 'Mechanics of development'.
Collapse
Affiliation(s)
- Elizabeth A Lawrence
- School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, UK
| | - Erika Kague
- School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, UK
| | - Jessye A Aggleton
- School of Anthropology and Archaeology, University of Bristol, Bristol BS8 1UU, UK
| | | | - Karen A Roddy
- School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, UK
| | - Chrissy L Hammond
- School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, UK
| |
Collapse
|
27
|
Moorer MC, Riddle RC. Regulation of Osteoblast Metabolism by Wnt Signaling. Endocrinol Metab (Seoul) 2018; 33:318-330. [PMID: 30112869 PMCID: PMC6145954 DOI: 10.3803/enm.2018.33.3.318] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 07/01/2018] [Accepted: 07/08/2018] [Indexed: 12/13/2022] Open
Abstract
Wnt/β-catenin signaling plays a critical role in the achievement of peak bone mass, affecting the commitment of mesenchymal progenitors to the osteoblast lineage and the anabolic capacity of osteoblasts depositing bone matrix. Recent studies suggest that this evolutionarily-conserved, developmental pathway exerts its anabolic effects in part by coordinating osteoblast activity with intermediary metabolism. These findings are compatible with the cloning of the gene encoding the low-density lipoprotein related receptor-5 (LRP5) Wnt co-receptor from a diabetes-susceptibility locus and the now well-established linkage between Wnt signaling and metabolism. In this article, we provide an overview of the role of Wnt signaling in whole-body metabolism and review the literature regarding the impact of Wnt signaling on the osteoblast's utilization of three different energy sources: fatty acids, glucose, and glutamine. Special attention is devoted to the net effect of nutrient utilization and the mode of regulation by Wnt signaling. Mechanistic studies indicate that the utilization of each substrate is governed by a unique mechanism of control with β-catenin-dependent signaling regulating fatty acid β-oxidation, while glucose and glutamine utilization are β-catenin-independent and downstream of mammalian target of rapamycin complex 2 (mTORC2) and mammalian target of rapamycin complex 1 (mTORC1) activation, respectively. The emergence of these data has provided a new context for the mechanisms by which Wnt signaling influences bone development.
Collapse
Affiliation(s)
- Megan C Moorer
- Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Baltimore Veterans Administration Medical Center, Baltimore, MD, USA
| | - Ryan C Riddle
- Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Baltimore Veterans Administration Medical Center, Baltimore, MD, USA.
| |
Collapse
|
28
|
Martínez-Gil N, Roca-Ayats N, Monistrol-Mula A, García-Giralt N, Díez-Pérez A, Nogués X, Mellibovsky L, Grinberg D, Balcells S. Common and rare variants of WNT16, DKK1 and SOST and their relationship with bone mineral density. Sci Rep 2018; 8:10951. [PMID: 30026596 PMCID: PMC6053384 DOI: 10.1038/s41598-018-29242-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 07/05/2018] [Indexed: 02/07/2023] Open
Abstract
Numerous GWAS and candidate gene studies have highlighted the role of the Wnt pathway in bone biology. Our objective has been to study in detail the allelic architecture of three Wnt pathway genes: WNT16, DKK1 and SOST, in the context of osteoporosis. We have resequenced the coding and some regulatory regions of these three genes in two groups with extreme bone mineral density (BMD) (n = ∼50, each) from the BARCOS cohort. No interesting novel variants were identified. Thirteen predicted functional variants have been genotyped in the full cohort (n = 1490), and for ten of them (with MAF > 0.01), the association with BMD has been studied. We have found six variants nominally associated with BMD, of which 2 WNT16 variants predicted to be eQTLs for FAM3C (rs55710688, in the Kozak sequence and rs142005327, within a putative enhancer) withstood multiple-testing correction. In addition, two rare variants in functional regions (rs190011371 in WNT16b 3′UTR and rs570754792 in the SOST TATA box) were found only present in three women each, all with BMD below the mean of the cohort. Our results reinforce the higher importance of regulatory versus coding variants in these Wnt pathway genes and open new ways for functional studies of the relevant variants.
Collapse
Affiliation(s)
- Núria Martínez-Gil
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, University of Barcelona, IBUB, IRSJD, CIBERER, Barcelona, Spain
| | - Neus Roca-Ayats
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, University of Barcelona, IBUB, IRSJD, CIBERER, Barcelona, Spain
| | - Anna Monistrol-Mula
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, University of Barcelona, IBUB, IRSJD, CIBERER, Barcelona, Spain
| | - Natàlia García-Giralt
- Musculoskeletal Research Group, IMIM (Hospital del Mar Medical Research Institute), Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), ISCIII, Barcelona, Spain
| | - Adolfo Díez-Pérez
- Musculoskeletal Research Group, IMIM (Hospital del Mar Medical Research Institute), Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), ISCIII, Barcelona, Spain
| | - Xavier Nogués
- Musculoskeletal Research Group, IMIM (Hospital del Mar Medical Research Institute), Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), ISCIII, Barcelona, Spain
| | - Leonardo Mellibovsky
- Musculoskeletal Research Group, IMIM (Hospital del Mar Medical Research Institute), Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), ISCIII, Barcelona, Spain
| | - Daniel Grinberg
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, University of Barcelona, IBUB, IRSJD, CIBERER, Barcelona, Spain
| | - Susana Balcells
- Department of Genetics, Microbiology and Statistics, Faculty of Biology, University of Barcelona, IBUB, IRSJD, CIBERER, Barcelona, Spain.
| |
Collapse
|
29
|
Correa-Rodríguez M, Schmidt Rio-Valle J, Rueda-Medina B. AKAP11 gene polymorphism is associated with bone mass measured by quantitative ultrasound in young adults. Int J Med Sci 2018; 15:999-1004. [PMID: 30013441 PMCID: PMC6036159 DOI: 10.7150/ijms.25369] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 05/27/2018] [Indexed: 01/18/2023] Open
Abstract
Background: Due to the increased prevalence of osteoporosis and direct health care cost of osteoporosis-related fractures, there is a growing interest in identifying genetic markers associated with osteoporosis phenotypes in order to develop genetic screening strategies. We aimed to analyze the possible associations between calcaneal Quantitative ultrasound (QUS), a valuable screening tool for assessing bone status in clinical practice, and ZBTB40 (rs7524102, rs6426749), SP7 (rs2016266) and AKAP11 (rs9533090) genes. Methods: A cross-sectional study was conducted on 550 healthy individuals of Caucasian ancestry (381 females and 169 males, median age 20.46±2,69). Bone mass was assessed through QUS to determine broadband ultrasound attenuation (BUA, dB/MHz). Single-nucleotide polymorphisms (SNPs) in ZBTB40 (rs7524102, rs6426749), SP7 (rs2016266) and AKAP11 (rs9533090) were selected as genetic markers and genotyped using TaqMan OpenArray® technology. Results: Linear regression analysis revealed that rs7524102 and rs6426749 in ZBTB40, and rs9533090 in AKAP11 were significantly associated with the calcaneal QUS parameter after adjustments for age, sex, weight, height, physical activity, and calcium intake (p=0.038, p=0.012 and p=0.008, respectively). After applying the Bonferroni correction for multiple testing (p=0.012), only the association of rs9533090 in AKAP11 remained significant. Conclusion:AKAP11 gene (rs9533090) influences QUS trait in a population of Caucasian young adults. The rs9533090 SNP may be considered a factor affecting peak bone mass acquisition.
Collapse
|
30
|
Glucocorticoids suppress Wnt16 expression in osteoblasts in vitro and in vivo. Sci Rep 2018; 8:8711. [PMID: 29880826 PMCID: PMC5992207 DOI: 10.1038/s41598-018-26300-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/09/2018] [Indexed: 01/21/2023] Open
Abstract
Glucocorticoid-induced osteoporosis is a frequent complication of systemic glucocorticoid (GC) therapy and mainly characterized by suppressed osteoblast activity. Wnt16 derived from osteogenic cells is a key determinant of bone mass. Here, we assessed whether GC suppress bone formation via inhibiting Wnt16 expression. GC treatment with dexamethasone (DEX) decreased Wnt16 mRNA levels in murine bone marrow stromal cells (mBMSCs) time- and dose-dependently. Similarly, Wnt16 expression was also suppressed after DEX treatment in calvarial organ cultures. Consistently, mice receiving GC-containing slow-release prednisolone pellets showed lower skeletal Wnt16 mRNA levels and bone mineral density than placebo-treated mice. The suppression of Wnt16 by GCs was GC-receptor-dependent as co-treatment of mBMSCs with DEX and the GR antagonist RU-486 abrogated the GC-mediated suppression of Wnt16. Likewise, DEX failed to suppress Wnt16 expression in GR knockout-mBMSCs. In addition, Wnt16 mRNA levels were unaltered in bone tissue of GC-treated GR dimerization-defective GRdim mice, suggesting that GCs suppress Wnt16 via direct DNA-binding mechanisms. Consistently, DEX treatment reduced Wnt16 promoter activity in MC3T3-E1 cells. Finally, recombinant Wnt16 restored DEX-induced suppression of bone formation in mouse calvaria. Thus, this study identifies Wnt16 as a novel target of GC action in GC-induced suppression of bone formation.
Collapse
|
31
|
Baron R, Gori F. Targeting WNT signaling in the treatment of osteoporosis. Curr Opin Pharmacol 2018; 40:134-141. [PMID: 29753194 DOI: 10.1016/j.coph.2018.04.011] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 04/21/2018] [Indexed: 12/17/2022]
Abstract
Osteoporosis is a widespread chronic disease characterized by low bone density, altered microstructure and bone fragility, leading to low impact fractures in affected individuals. The discovery of a few mutations that cause extremely rare human diseases has identified the WNT signaling pathway as a candidate for therapeutic intervention aimed at increasing bone mass and strength. In particular, inhibition of sclerostin, a WNT antagonist secreted by osteocytes, has proven in clinical trials to be a very efficient osteo-anabolic approach. One year of monthly administration of antibodies to sclerostin rapidly decreases bone resorption and increases bone formation and bone density at all sites, decreasing markedly fracture risk in treated patients. Their effect is however limited in time and cardiovascular adverse events have been reported in one clinical trial.
Collapse
Affiliation(s)
- Roland Baron
- Harvard Medical School, Endocrine Unit, Massachusetts General Hospital, Boston, MA, USA; Harvard School of Dental Medicine, Division of Bone and Mineral Research, Department of Oral Medicine, Infection and Immunity, Boston, MA, USA.
| | - Francesca Gori
- Harvard School of Dental Medicine, Division of Bone and Mineral Research, Department of Oral Medicine, Infection and Immunity, Boston, MA, USA
| |
Collapse
|
32
|
Ohlsson C, Henning P, Nilsson KH, Wu J, Gustafsson KL, Sjögren K, Törnqvist A, Koskela A, Zhang FP, Lagerquist MK, Poutanen M, Tuukkanen J, Lerner UH, Movérare-Skrtic S. Inducible Wnt16 inactivation: WNT16 regulates cortical bone thickness in adult mice. J Endocrinol 2018; 237. [PMID: 29530924 PMCID: PMC5886037 DOI: 10.1530/joe-18-0020] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Substantial progress has been made in the therapeutic reduction of vertebral fracture risk in patients with osteoporosis, but non-vertebral fracture risk has been improved only marginally. Human genetic studies demonstrate that the WNT16 locus is a major determinant of cortical bone thickness and non-vertebral fracture risk and mouse models with life-long Wnt16 inactivation revealed that WNT16 is a key regulator of cortical thickness. These studies, however, could not exclude that the effect of Wnt16 inactivation on cortical thickness might be caused by early developmental and/or growth effects. To determine the effect of WNT16 specifically on adult cortical bone homeostasis, Wnt16 was conditionally ablated in young adult and old mice through tamoxifen-inducible Cre-mediated recombination using CAG-Cre-ER; Wnt16flox/flox (Cre-Wnt16flox/flox) mice. First, 10-week-old Cre-Wnt16flox/flox and Wnt16flox/flox littermate control mice were treated with tamoxifen. Four weeks later, Wnt16 mRNA levels in cortical bone were reduced and cortical thickness in femur was decreased in Cre-Wnt16flox/flox mice compared to Wnt16flox/flox mice. Then, inactivation of Wnt16 in 47-week-old mice (evaluated four weeks later) resulted in a reduction of Wnt16 mRNA levels, cortical thickness and cortical bone strength with no effect on trabecular bone volume fraction. Mechanistic studies demonstrated that the reduced cortical bone thickness was caused by a combination of increased bone resorption and reduced periosteal bone formation. In conclusion, WNT16 is a crucial regulator of cortical bone thickness in young adult and old mice. We propose that new treatment strategies targeting the adult regulation of WNT16 might be useful to reduce fracture risk at cortical bone sites.
Collapse
Affiliation(s)
- Claes Ohlsson
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Petra Henning
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Karin H Nilsson
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Jianyao Wu
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Karin L Gustafsson
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Klara Sjögren
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Anna Törnqvist
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Antti Koskela
- Department of Anatomy and Cell BiologyInstitute of Cancer Research and Translational Medicine, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Fu-Ping Zhang
- Research Centre for Integrative Physiology and PharmacologyTurku Center for Disease Modeling, Institute of Biomedicine, University of Turku, Turku, Finland
| | - Marie K Lagerquist
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Matti Poutanen
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
- Research Centre for Integrative Physiology and PharmacologyTurku Center for Disease Modeling, Institute of Biomedicine, University of Turku, Turku, Finland
| | - Juha Tuukkanen
- Department of Anatomy and Cell BiologyInstitute of Cancer Research and Translational Medicine, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Ulf H Lerner
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| | - Sofia Movérare-Skrtic
- Centre for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, Gothenburg, Sweden
| |
Collapse
|
33
|
Grigorie D, Lerner U. THE CRUCIAL ROLE OF THE WNT SYSTEM IN BONE REMODELLING. ACTA ENDOCRINOLOGICA (BUCHAREST, ROMANIA : 2005) 2018; 14:90-101. [PMID: 31149241 PMCID: PMC6516605 DOI: 10.4183/aeb.2018.90] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The maintenance of bone mass is critically dependent on the balance between bone formation by osteoblasts and bone resorption by osteoclasts, processes in which osteocytes play also an important role. The activities of these bone cells are regulated by a variety of endocrine and paracrine factors of which sex steroids, parathyroid hormone, 1.25(OH)2-vitamin D3, glucocorticoids, retinoids and thyroid hormones are the most well known systemic factors. To the long list of locally acting factors belong cytokines and growth factors. This list was extended some 15 years ago by the discovery of the very important role of the WNT signalling system for the maintenance of bone mass. The first evidence of its role was the findings that mutations in the LRP5 gene, encoding a co-receptor in WNT-signaling, could result in either gain or loss of bone mass, i.e. either high bone mass or osteoporosis. This was a most unexpected observation since no indications existed prior to this discovery that the WNT signalling system had a role in bone remodeling. Since then, many observations have been made demonstrating the important role of different WNTs in regulating bone formation and resorption. Interestingly, some of these findings have demonstrated that trabecular and cortical bone are regulated by different mechanisms. It is the aim of the present overview to give the readers an insight into the WNT signalling system and its role in bone remodeling.
Collapse
Affiliation(s)
- D. Grigorie
- “C.I. Parhon” National Institute of Endocrinology, Bucharest, Romania
| | - U.H. Lerner
- Institute for Medicine, Sahlgrenska Academy at University of Gothenburg - Centre for Bone and Arthritis Research at Department of Internal Medicine and Clinical Nutrition, Gothenburg, Sweden
| |
Collapse
|
34
|
Correa-Rodríguez M, Schmidt Rio-Valle J, Rueda-Medina B. The RSPO3 gene as genetic markers for bone mass assessed by quantitative ultrasound in a population of young adults. Ann Hum Genet 2017; 82:143-149. [PMID: 29230809 DOI: 10.1111/ahg.12235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 11/08/2017] [Accepted: 11/15/2017] [Indexed: 12/16/2022]
Abstract
Ultrasound bone mass measurement has been postulated as a valuable bone-health assessment tool for primary care. The aim of this study was to analyse the possible relationship between the SPTBN1, RSPO3, CCDC170, DKK1, GPATCH1, and TMEM135 genes, with calcaneal quantitative ultrasound (QUS) in a population of young adults. These genes were first associated with broadband ultrasound attenuation (BUA) in the GEFOS/GENOMOS study. A cross-sectional study was conducted on 575 individuals (mean age 20.41 ± 2.69). Bone mass at the right calcaneus was estimated by QUS. Six single-nucleotide polymorphisms (SNPs) in SPTBN1 (rs11898505), RSPO3 (rs7741021), CCDC170 (rs4869739), DKK1 (rs7902708), TMEM135 (rs597319), and GPATCH1 (rs10416265) were selected as genetic markers based on their previous association with calcaneal QUS. After adjusting for multiple confounding factors, the only significant association with QUS in our population was found for the rs7741021 SNP in the RSPO3 gene (P = 0.006) using the dominant model of inheritance. This suggests the possible implication of the RSPO3 gene in bone mass acquisition during early adulthood.
Collapse
|
35
|
Correa-Rodríguez M, Viatte S, Massey J, Schmidt-RioValle J, Rueda-Medina B, Orozco G. Analysis of SNP-SNP interactions and bone quantitative ultrasound parameter in early adulthood. BMC MEDICAL GENETICS 2017; 18:107. [PMID: 28974197 PMCID: PMC5627468 DOI: 10.1186/s12881-017-0468-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 09/27/2017] [Indexed: 11/18/2022]
Abstract
Background Osteoporosis individual susceptibility is determined by the interaction of multiple genetic variants and environmental factors. The aim of this study was to conduct SNP-SNP interaction analyses in candidate genes influencing heel quantitative ultrasound (QUS) parameter in early adulthood to identify novel insights into the mechanism of disease. Methods The study population included 575 healthy subjects (mean age 20.41; SD 2.36). To assess bone mass QUS was performed to determine Broadband ultrasound attenuation (BUA, dB/MHz). A total of 32 SNPs mapping to loci that have been characterized as genetic markers for QUS and/or BMD parameters were selected as genetic markers in this study. The association of all possible SNP pairs with QUS was assessed by linear regression and a SNP-SNP interaction was defined as a significant departure from additive effects. Results The pairwise SNP-SNP analysis showed multiple interactions. The interaction comprising SNPs rs9340799 and rs3736228 that map in the ESR1 and LRP5 genes respectively, revealed the lowest p value after adjusting for confounding factors (p-value = 0.001, β (95% CI) = 14.289 (5.548, 23.029). In addition, our model reported others such as TMEM135-WNT16 (p = 0.007, β(95%CI) = 9.101 (2.498, 15.704), ESR1-DKK1 (p = 0.012, β(95%CI) = 13.641 (2.959, 24.322) or OPG-LRP5 (p = 0.012, β(95%CI) = 8.724 (1.936, 15.512). However, none of the detected interactions remain significant considering the Bonferroni significance threshold for multiple testing (p<0.0001). Conclusion Our analysis of SNP-SNP interaction in candidate genes of QUS in Caucasian young adults reveal several interactions, especially between ESR1 and LRP5 genes, that did not reach statistical significance. Although our results do not support a relevant genetic contribution of SNP-SNP epistatic interactions to QUS in young adults, further studies in larger independent populations would be necessary to support these preliminary findings.
Collapse
Affiliation(s)
- María Correa-Rodríguez
- Faculty of Health Sciences, University of Granada, Av. Ilustración, 60, 18016, Granada, Spain.
| | - Sebastien Viatte
- Arthritis Research UK Centre for Genetics and Genomics, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
| | - Jonathan Massey
- Arthritis Research UK Centre for Genetics and Genomics, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
| | | | - Blanca Rueda-Medina
- Faculty of Health Sciences, University of Granada, Av. Ilustración, 60, 18016, Granada, Spain
| | - Gisela Orozco
- Arthritis Research UK Centre for Genetics and Genomics, Centre for Musculoskeletal Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
| |
Collapse
|
36
|
García-Ibarbia C, Neila S, Garcés C, Alonso MA, Zarrabeitia MT, Valero C, Ortiz F, Riancho JA. Non-synonymous WNT16 polymorphisms alleles are associated with different osteoarthritis phenotypes. Rheumatol Int 2017; 37:1667-1672. [PMID: 28766055 DOI: 10.1007/s00296-017-3783-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 07/26/2017] [Indexed: 11/28/2022]
Abstract
Hereditary factors have a strong influence on osteoarthritis (OA). The Wnt pathway is involved in bone and cartilage homeostasis. Hence, we hypothesized that allelic variations of WNT16 could influence the OA phenotype. We studied 509 Caucasian patients undergoing joint replacement due to severe primary OA. Radiographs were used to classify the OA as atrophic or hypertrophic. Two nonsynonymous polymorphisms of WNT16 (rs2707466 and rs2908004) were analyzed. The association between the genotypes and the OA phenotype was analyzed by logistic regression and adjusted for age and body mass index. A genotype-phenotype association was found in the sex-stratified analysis. Thus, there was a significant difference in the genotypic frequencies of rs2707466 between hypertrophic and atrophic hip OA in males (p = 0.003), with overrepresentation of G alleles in the hypertrophic phenotype (OR 2.08; CI 1.28-3.38). An association in the same direction was observed between these alleles and the type of knee OA, with G alleles being more common in the hypertrophic than in atrophic knee phenotypes (p = 0.008; OR 1.956, CI 1.19-3.19). Similar associations were found for the rs2908004 SNP, but it only reached statistical significance for knee OA (p = 0.017; OR 0.92, CI 0.86-0.989). This is the first study attempting to explore the association of genetic variants with the OA phenotype. These data suggest the need to consider the OA phenotype in future genetic association studies of OA.
Collapse
Affiliation(s)
- Carmen García-Ibarbia
- Departments of Internal Medicine and Orthopedic Surgery, Hospital UM Valdecilla, University of Cantabria, IDIVAL, Av Valdecilla sn, 39008, Santander, Spain
| | - Sara Neila
- Departments of Internal Medicine and Orthopedic Surgery, Hospital UM Valdecilla, University of Cantabria, IDIVAL, Av Valdecilla sn, 39008, Santander, Spain
| | - Carlos Garcés
- Departments of Internal Medicine and Orthopedic Surgery, Hospital UM Valdecilla, University of Cantabria, IDIVAL, Av Valdecilla sn, 39008, Santander, Spain
| | - Maria A Alonso
- Departments of Internal Medicine and Orthopedic Surgery, Hospital UM Valdecilla, University of Cantabria, IDIVAL, Av Valdecilla sn, 39008, Santander, Spain
| | - María T Zarrabeitia
- Departments of Internal Medicine and Orthopedic Surgery, Hospital UM Valdecilla, University of Cantabria, IDIVAL, Av Valdecilla sn, 39008, Santander, Spain
| | - Carmen Valero
- Departments of Internal Medicine and Orthopedic Surgery, Hospital UM Valdecilla, University of Cantabria, IDIVAL, Av Valdecilla sn, 39008, Santander, Spain
| | - Fernando Ortiz
- Departments of Internal Medicine and Orthopedic Surgery, Hospital UM Valdecilla, University of Cantabria, IDIVAL, Av Valdecilla sn, 39008, Santander, Spain
| | - José A Riancho
- Departments of Internal Medicine and Orthopedic Surgery, Hospital UM Valdecilla, University of Cantabria, IDIVAL, Av Valdecilla sn, 39008, Santander, Spain.
| |
Collapse
|
37
|
Brunt LH, Begg K, Kague E, Cross S, Hammond CL. Wnt signalling controls the response to mechanical loading during zebrafish joint development. Development 2017; 144:2798-2809. [PMID: 28684625 PMCID: PMC5560048 DOI: 10.1242/dev.153528] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 06/14/2017] [Indexed: 12/24/2022]
Abstract
Joint morphogenesis requires mechanical activity during development. Loss of mechanical strain causes abnormal joint development, which can impact long-term joint health. Although cell orientation and proliferation are known to shape the joint, dynamic imaging of developing joints in vivo has not been possible in other species. Using genetic labelling techniques in zebrafish we were able, for the first time, to dynamically track cell behaviours in intact moving joints. We identify that proliferation and migration, which contribute to joint morphogenesis, are mechanically controlled and are significantly reduced in immobilised larvae. By comparison with strain maps of the developing skeleton, we identify canonical Wnt signalling as a candidate for transducing mechanical forces into joint cell behaviours. We show that, in the jaw, Wnt signalling is reduced specifically in regions of high strain in response to loss of muscle activity. By pharmacological manipulation of canonical Wnt signalling, we demonstrate that Wnt acts downstream of mechanical activity and is required for joint patterning and chondrocyte maturation. Wnt16, which is also downstream of muscle activity, controls proliferation and migration, but plays no role in chondrocyte intercalation.
Collapse
Affiliation(s)
- Lucy H Brunt
- Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, UK
| | - Katie Begg
- Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, UK
| | - Erika Kague
- Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, UK
| | - Stephen Cross
- Wolfson Bioimaging Facility, University of Bristol, Bristol BS8 1TD, UK
| | - Chrissy L Hammond
- Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, UK
| |
Collapse
|
38
|
Abstract
BACKGROUND The receptor activator of the nuclear factor-kappa B ligand (RANKL), the receptor activator of nuclear factor-kappa B (RANK), and the osteoprotegerin (OPG) signaling pathway play an important role in the regulation of bone remodeling and osteoclast differentiation. Quantitative ultrasound (QUS) is a relatively recent and noninvasive method providing structural information on microstructure, bone elasticity, and connectivity. However, in contrast to bone mineral density measurements, the possible association of the RANKL/RANK/OPG pathway with heel QUS has not been analyzed. OBJECTIVES The aim of this study was to assess, for the first time, the contribution of the RANKL/RANK/OPG pathway genes in the genetic background of heel QUS parameters. METHODS Ten single-nucleotide polymorphisms (SNPs) of RANKL (rs9594759, rs12585014, rs7988338, rs2148073), RANK (rs1805034, rs12458117, rs3018362), and OPG (rs4355801, rs3102735, rs2073618) were selected as genetic markers and genotyped using Open Array technology in 575 self-reported Caucasian individuals aged 18-25. Bone mass in the right calcaneus was estimated with QUS to obtain the broadband ultrasound attenuation (BUA) measurement (dB/MHz). Linear regression analyses were performed to test the possible association between the SNPs and BUA. RESULTS Linear regression analysis of all the tested SNPs revealed no significant association with the BUA parameter after adjusting for age, gender, weight, height, physical activity, and calcium intake. The lowest p-value was observed for the rs9594759 RANKL polymorphism and heel QUS (p = .06; b* = -.075, 95% CI [-0.960, 0.028]). CONCLUSION Our results suggest that the polymorphism of the RANKL, RANK, and OPG genes does not make a significant genetic contribution to heel ultrasound measurements in a population of young Caucasian adults. Further studies replicating the results in independent populations are needed to support these initial findings.
Collapse
|
39
|
Alam I, Reilly AM, Alkhouli M, Gerard-O'Riley RL, Kasipathi C, Oakes DK, Wright WB, Acton D, McQueen AK, Patel B, Lim KE, Robling AG, Econs MJ. Bone Mass and Strength are Significantly Improved in Mice Overexpressing Human WNT16 in Osteocytes. Calcif Tissue Int 2017; 100:361-373. [PMID: 28013361 PMCID: PMC5337173 DOI: 10.1007/s00223-016-0225-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 12/16/2016] [Indexed: 11/26/2022]
Abstract
Recently, we demonstrated that osteoblast-specific overexpression of human WNT16 increased both cortical and trabecular bone mass and structure in mice. To further identify the cell-specific role of Wnt16 in bone homeostasis, we created transgenic (TG) mice overexpressing human WNT16 in osteocytes using Dmp1 promoter (Dmp1-hWNT16 TG) on C57BL/6 (B6) background. We analyzed bone phenotypes and serum bone biomarkers, performed gene expression analysis and measured dynamic bone histomorphometry in Dmp1-hWNT16 TG and wild-type (WT) mice. Compared to WT mice, Dmp1-hWNT16 TG mice exhibited significantly higher whole-body, spine and femoral aBMD, BMC and trabecular (BV/TV, Tb.N, and Tb.Th) and cortical (bone area and thickness) parameters in both male and female at 12 weeks of age. Femur stiffness and ultimate force were also significantly improved in the Dmp1-hWNT16 TG female mice, compared to sex-matched WT littermates. In addition, female Dmp1-hWNT16 TG mice displayed significantly higher MS/BS, MAR and BFR/BS compared to the WT mice. Gene expression analysis demonstrated significantly higher mRNA level of Alp in both male and female Dmp1-hWNT16 TG mice and significantly higher levels of Osteocalcin, Opg and Rankl in the male Dmp1-hWNT16 TG mice in bone tissue compared to sex-matched WT mice. These results indicate that WNT16 plays a critical role for acquisition of both cortical and trabecular bone mass and strength. Strategies designed to use WNT16 as a target for therapeutic interventions will be valuable to treat osteoporosis and other low bone mass conditions.
Collapse
Affiliation(s)
- Imranul Alam
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA.
| | - Austin M Reilly
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Mohammed Alkhouli
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Rita L Gerard-O'Riley
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Charishma Kasipathi
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Dana K Oakes
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Weston B Wright
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Dena Acton
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Amie K McQueen
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Bhavmik Patel
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
| | - Kyung-Eun Lim
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Alexander G Robling
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Michael J Econs
- Division of Endocrinology, Department of Medicine, Indiana University School of Medicine, 1120 West Michigan St, CL459, Indianapolis, IN, 46202, USA
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA
| |
Collapse
|
40
|
How rare bone diseases have informed our knowledge of complex diseases. BONEKEY REPORTS 2016; 5:839. [PMID: 27688878 DOI: 10.1038/bonekey.2016.69] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 07/22/2016] [Indexed: 02/07/2023]
Abstract
Rare bone diseases, generally defined as monogenic traits with either autosomal recessive or dominant patterns of inheritance, have provided a rich database of genes and associated pathways over the past 2-3 decades. The molecular genetic dissection of these bone diseases has yielded some major surprises in terms of the causal genes and/or involved pathways. The discovery of genes/pathways involved in diseases such as osteopetrosis, osteosclerosis, osteogenesis imperfecta and many other rare bone diseases have all accelerated our understanding of complex traits. Importantly these discoveries have provided either direct validation for a specific gene embedded in a group of genes within an interval identified through a complex trait genome-wide association study (GWAS) or based upon the pathway associated with a monogenic trait gene, provided a means to prioritize a large number of genes for functional validation studies. In some instances GWAS studies have yielded candidate genes that fall within linkage intervals associated with monogenic traits and resulted in the identification of causal mutations in those rare diseases. Driving all of this discovery is a complement of technologies such as genome sequencing, bioinformatics and advanced statistical analysis methods that have accelerated genetic dissection and greatly reduced the cost. Thus, rare bone disorders in partnership with GWAS have brought us to the brink of a new era of personalized genomic medicine in which the prevention and management of complex diseases will be driven by the molecular understanding of each individuals contributing genetic risks for disease.
Collapse
|
41
|
Abstract
Osteoporosis is characterized by low bone mass and an increased risk of fracture. Genetic factors, environmental factors and gene-environment interactions all contribute to a person's lifetime risk of developing an osteoporotic fracture. This Review summarizes key advances in understanding of the genetics of bone traits and their role in osteoporosis. Candidate-gene approaches dominated this field 20 years ago, but clinical and preclinical genetic studies published in the past 5 years generally utilize more-sophisticated and better-powered genome-wide association studies (GWAS). High-throughput DNA sequencing, large genomic databases and improved methods of data analysis have greatly accelerated the gene-discovery process. Linkage analyses of single-gene traits that segregate in families with extreme phenotypes have led to the elucidation of critical pathways controlling bone mass. For example, components of the Wnt-β-catenin signalling pathway have been validated (in both GWAS and functional studies) as contributing to various bone phenotypes. These notable advances in gene discovery suggest that the next decade will witness cataloguing of the hundreds of genes that influence bone mass and osteoporosis, which in turn will provide a roadmap for the development of new drugs that target diseases of low bone mass, including osteoporosis.
Collapse
|
42
|
Correa-Rodríguez M, Schmidt Rio-Valle J, Rueda-Medina B. Polymorphisms of the WNT16 gene are associated with the heel ultrasound parameter in young adults. Osteoporos Int 2016; 27:1057-1061. [PMID: 26510844 DOI: 10.1007/s00198-015-3379-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/20/2015] [Indexed: 11/30/2022]
Abstract
SUMMARY Bone mineral content is influenced by genetic factors. We investigated the role of WNT16 in bone properties determined using quantitative ultrasound (QUS) on young adults. Three WNT16 genetic markers (rs2908007, rs2908004, and rs2707466) were found to have a significant association with the broadband ultrasound attenuation (BUA) measurement, suggesting that WNT16 influences bone mass in young adults. INTRODUCTION The aim of this study was to investigate whether genetic markers on the WNT16 gene are associated with bone mass, as assessed using QUS in a population of healthy young Spanish adults. METHODS A cross-sectional study was conducted on 575 individuals (mean age 20.41 ± 2.69). Bone quality was assessed using BUA measurements (dB/MHz) on the right calcaneus. Six single nucleotide polymorphisms (SNPs) (rs2908007, rs2908004, rs3801387, rs3801385, rs2707466, and rs2536184) covering the WNT16 gene were selected as genetic markers and genotyped to test their association with BUA variations. RESULTS The rs2908007, rs2908004, and rs2707466 SNPs were found to have a significant association with BUA (p = 0.004, p = 0.001, and p = 0.004, respectively). CONCLUSION We demonstrate for the first time that WNT16 genetic polymorphisms influence QUS traits in a population of young adults. This finding suggests that WNT16 might be an important genetic factor in determining peak bone mass acquisition.
Collapse
Affiliation(s)
- M Correa-Rodríguez
- Department of Nursing, Faculty of Health Sciences, University of Granada (Spain), Av. Ilustración S/N, 18007, Granada, Spain.
| | - J Schmidt Rio-Valle
- Department of Nursing, Faculty of Health Sciences, University of Granada (Spain), Av. Ilustración S/N, 18007, Granada, Spain
| | - B Rueda-Medina
- Department of Nursing, Faculty of Health Sciences, University of Granada (Spain), Av. Ilustración S/N, 18007, Granada, Spain
| |
Collapse
|
43
|
Wnt16 Signaling Is Required for IL-1β-Induced Matrix Metalloproteinase-13-Regulated Proliferation of Human Stem Cell-Derived Osteoblastic Cells. Int J Mol Sci 2016; 17:221. [PMID: 26861315 PMCID: PMC4783953 DOI: 10.3390/ijms17020221] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 02/01/2016] [Indexed: 01/01/2023] Open
Abstract
We established a differentiation method for homogeneous α7 integrin-positive human skeletal muscle stem cell (α7+hSMSC)-derived osteoblast-like (α7+hSMSC-OB) cells, and found that interleukin (IL)-1β induces matrix metalloproteinase (MMP)-13-regulated proliferation of these cells. These data suggest that MMP-13 plays a potentially unique physiological role in the regeneration of osteoblast-like cells. Here, we examined whether up-regulation of MMP-13 activity by IL-1β was mediated by Wingless/int1 (Wnt) signaling and increased the proliferation of osteoblast-like cells. IL-1β increased the mRNA and protein levels of Wnt16 and the Wnt receptor Lrp5/Fzd2. Exogenous Wnt16 was found to increase MMP-13 mRNA, protein and activity, and interestingly, the proliferation rate of these cells. Treatment with small interfering RNAs against Wnt16 and Lrp5 suppressed the IL-1β-induced increase in cell proliferation. We revealed that a unique signaling cascade IL-1β→Wnt16→Lrp5→MMP-13, was intimately involved in the proliferation of osteoblast-like cells, and suggest that IL-1β-induced MMP-13 expression and changes in cell proliferation are regulated by Wnt16.
Collapse
|
44
|
Alam I, Alkhouli M, Gerard-O'Riley RL, Wright WB, Acton D, Gray AK, Patel B, Reilly AM, Lim KE, Robling AG, Econs MJ. Osteoblast-Specific Overexpression of Human WNT16 Increases Both Cortical and Trabecular Bone Mass and Structure in Mice. Endocrinology 2016; 157:722-36. [PMID: 26584014 PMCID: PMC4733115 DOI: 10.1210/en.2015-1281] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Previous genome-wide association studies have identified common variants in genes associated with bone mineral density (BMD) and risk of fracture. Recently, we identified single nucleotide polymorphisms (SNPs) in Wingless-type mouse mammary tumor virus integration site (WNT)16 that were associated with peak BMD in premenopausal women. To further identify the role of Wnt16 in bone mass regulation, we created transgenic (TG) mice overexpressing human WNT16 in osteoblasts. We compared bone phenotypes, serum biochemistry, gene expression, and dynamic bone histomorphometry between TG and wild-type (WT) mice. Compared with WT mice, WNT16-TG mice exhibited significantly higher whole-body areal BMD and bone mineral content (BMC) at 6 and 12 weeks of age in both male and female. Microcomputer tomography analysis of trabecular bone at distal femur revealed 3-fold (male) and 14-fold (female) higher bone volume/tissue volume (BV/TV), and significantly higher trabecular number and trabecular thickness but lower trabecular separation in TG mice compared with WT littermates in both sexes. The cortical bone at femur midshaft also displayed significantly greater bone area/total area and cortical thickness in the TG mice in both sexes. Serum biochemistry analysis showed that male TG mice had higher serum alkaline phosphatase, osteocalcin, osteoprotegerin (OPG), OPG to receptor activator of NF-kB ligand (tumor necrosis family ligand superfamily, number 11; RANKL) ratio as compared with WT mice. Also, lower carboxy-terminal collagen cross-link (CTX) to tartrate-resistant acid phosphatase 5, isoform b (TRAPc5b) ratio was observed in TG mice compared with WT littermates in both male and female. Histomorphometry data demonstrated that both male and female TG mice had significantly higher cortical and trabecular mineralizing surface/bone surface and bone formation rate compared with sex-matched WT mice. Gene expression analysis demonstrated higher expression of Alp, OC, Opg, and Opg to Rankl ratio in bone tissue in the TG mice compared with WT littermates. Our data indicate that WNT16 is critical for positive regulation of both cortical and trabecular bone mass and structure and that this molecule might be targeted for therapeutic interventions to treat osteoporosis.
Collapse
Affiliation(s)
- Imranul Alam
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Mohammed Alkhouli
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Rita L Gerard-O'Riley
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Weston B Wright
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Dena Acton
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Amie K Gray
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Bhavmik Patel
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Austin M Reilly
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Kyung-Eun Lim
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Alexander G Robling
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| | - Michael J Econs
- Departments of Medicine (I.A., M.A., R.L.G.O., W.B.W., D.A., A.K.G., B.P., A.M.R., M.J.E.), Medical and Molecular Genetics (M.J.E.), and Anatomy and Cell Biology (K.-E.L., A.G.R.), Indiana University School of Medicine, Indiana 46202
| |
Collapse
|
45
|
Costantini A, Mäkitie O. Value of rare low bone mass diseases for osteoporosis genetics. BONEKEY REPORTS 2016; 5:773. [PMID: 26793304 PMCID: PMC4704609 DOI: 10.1038/bonekey.2015.143] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 11/23/2015] [Indexed: 12/14/2022]
Abstract
Osteoporosis presents as increased susceptibility to fractures due to bone loss and compromised bone microstructure. Osteoporosis mainly affects the elderly population, but it is increasingly recognized that compromised bone health with low bone mass and increased fractures may have its onset already in childhood. In such cases, genetic component is likely to contribute more than lifestyle factors to disease onset. During the last decade, our understanding of the genetic determinants of osteoporosis has significantly increased through family studies, candidate gene studies and genome-wide association studies (GWASs). GWASs have led to identification of several genetic loci associated with osteoporosis. A valuable contribution to the research field has been made through studies involving families with childhood-onset rare bone diseases such as osteogenesis imperfecta, osteoporosis-pseudoglioma syndrome and various other skeletal dysplasias with reduced bone mass. Some genes involved in rare low bone mass diseases, such as LRP5 and WNT1, participate in the Wnt/β-catenin pathway, and their discovery has underscored the importance of this pathway for normal skeletal health. The still continuing discovery of gene defects underlying various low bone mass phenotypes contributes to our understanding of normal bone metabolism and enables development of new therapies for osteoporosis.
Collapse
Affiliation(s)
- Alice Costantini
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Outi Mäkitie
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden
- Folkhälsan Institute of Genetics, Helsinki, Finland
- Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| |
Collapse
|
46
|
The bone-sparing effects of estrogen and WNT16 are independent of each other. Proc Natl Acad Sci U S A 2015; 112:14972-7. [PMID: 26627248 DOI: 10.1073/pnas.1520408112] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Wingless-type MMTV integration site family (WNT)16 is a key regulator of bone mass with high expression in cortical bone, and Wnt16(-/-) mice have reduced cortical bone mass. As Wnt16 expression is enhanced by estradiol treatment, we hypothesized that the bone-sparing effect of estrogen in females is WNT16-dependent. This hypothesis was tested in mechanistic studies using two genetically modified mouse models with either constantly high osteoblastic Wnt16 expression or no Wnt16 expression. We developed a mouse model with osteoblast-specific Wnt16 overexpression (Obl-Wnt16). These mice had several-fold elevated Wnt16 expression in both trabecular and cortical bone compared with wild type (WT) mice. Obl-Wnt16 mice displayed increased total body bone mineral density (BMD), surprisingly caused mainly by a substantial increase in trabecular bone mass, resulting in improved bone strength of vertebrae L3. Ovariectomy (ovx) reduced the total body BMD and the trabecular bone mass to the same degree in Obl-Wnt16 mice and WT mice, suggesting that the bone-sparing effect of estrogen is WNT16-independent. However, these bone parameters were similar in ovx Obl-Wnt16 mice and sham operated WT mice. The role of WNT16 for the bone-sparing effect of estrogen was also evaluated in Wnt16(-/-) mice. Treatment with estradiol increased the trabecular and cortical bone mass to a similar extent in both Wnt16(-/-) and WT mice. In conclusion, the bone-sparing effects of estrogen and WNT16 are independent of each other. Furthermore, loss of endogenous WNT16 results specifically in cortical bone loss, whereas overexpression of WNT16 surprisingly increases mainly trabecular bone mass. WNT16-targeted therapies might be useful for treatment of postmenopausal trabecular bone loss.
Collapse
|
47
|
Wnt16 Is Associated with Age-Related Bone Loss and Estrogen Withdrawal in Murine Bone. PLoS One 2015; 10:e0140260. [PMID: 26451596 PMCID: PMC4599960 DOI: 10.1371/journal.pone.0140260] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 08/28/2015] [Indexed: 11/19/2022] Open
Abstract
Genome Wide Association Studies suggest that Wnt16 is an important contributor to the mechanisms controlling bone mineral density, cortical thickness, bone strength and ultimately fracture risk. Wnt16 acts on osteoblasts and osteoclasts and, in cortical bone, is predominantly derived from osteoblasts. This led us to hypothesize that low bone mass would be associated with low levels of Wnt16 expression and that Wnt16 expression would be increased by anabolic factors, including mechanical loading. We therefore investigated Wnt16 expression in the context of ageing, mechanical loading and unloading, estrogen deficiency and replacement, and estrogen receptor α (ERα) depletion. Quantitative real time PCR showed that Wnt16 mRNA expression was lower in cortical bone and marrow of aged compared to young female mice. Neither increased nor decreased (by disuse) mechanical loading altered Wnt16 expression in young female mice, although Wnt16 expression was decreased following ovariectomy. Both 17β-estradiol and the Selective Estrogen Receptor Modulator Tamoxifen increased Wnt16 expression relative to ovariectomy. Wnt16 and ERβ expression were increased in female ERα-/- mice when compared to Wild Type. We also addressed potential effects of gender on Wnt16 expression and while the expression was lower in the cortical bone of aged males as in females, it was higher in male bone marrow of aged mice compared to young. In the kidney, which we used as a non-bone reference tissue, Wnt16 expression was unaffected by age in either males or females. In summary, age, and its associated bone loss, is associated with low levels of Wnt16 expression whereas bone loss associated with disuse has no effect on Wnt16 expression. In the artificially loaded mouse tibia we observed no loading-related up-regulation of Wnt16 expression but provide evidence that its expression is influenced by estrogen receptor signaling. These findings suggest that while Wnt16 is not an obligatory contributor to regulation of bone mass per se, it potentially plays a role in influencing pathways associated with regulation of bone mass during ageing and estrogen withdrawal.
Collapse
|
48
|
The regulation of osteoclast differentiation by Wnt signals. BONEKEY REPORTS 2015; 4:713. [PMID: 26157576 DOI: 10.1038/bonekey.2015.82] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 04/24/2015] [Indexed: 01/07/2023]
Abstract
Wnt ligands activate β-catenin-dependent canonical and -independent noncanonical signaling pathways. Wnt regulates many physiological events such as the development of organs and bone metabolism. In contrast, failed signaling leads to pathological conditions including cancer and osteoporosis. Analyses of loss-of-function mutations in the low-density lipoprotein receptor-related protein (Lrp) 5 gene revealed that Lrp5 acted as a co-receptor of Wnt/β-catenin signals and positively regulated bone mass in humans and mice. Many players in Wnt signals including sclerostin, an osteocyte-derived Wnt antagonist, also have since been found to influence bone mass. Bone mass is regulated by the activities of bone-forming osteoblasts, -resorbing osteoclasts and matrix-embedded osteocytes. The roles of Wnt/β-catenin signals in osteoblastogenesis and osteoclastogenesis have been established by the findings of a large number of in vitro and in vivo studies. In contrast, the roles of noncanonical Wnt signals in bone metabolism are only now being examined. In this review, we introduced and discussed recent information on the roles of Wnt signals in bone resorption.
Collapse
|
49
|
Abstract
WNTs are extracellular proteins that activate different cell surface receptors linked to canonical and noncanonical WNT signalling pathways. The Wnt genes were originally discovered as important for embryonic development of fruit flies and malignant transformation of mouse mammary cancers. More recently, WNTs have been implicated in a wide spectrum of biological phenomena and diseases. During the last decade, several lines of clinical and preclinical evidence have indicated that WNT signalling is critical for trabecular and cortical bone mass, and this pathway is currently an attractive target for drug development. Based on detailed knowledge of the different WNT signalling pathways, it appears that it might be possible to develop drugs that specifically target cortical and trabecular bone. Neutralization of a bone-specific WNT inhibitor is now being evaluated as a promising anabolic treatment for patients with osteoporosis. Here, we provide the historical background to the discoveries of WNTs, describe the different WNT signalling pathways and summarize the current understanding of how these proteins regulate bone mass by affecting bone formation and resorption.
Collapse
Affiliation(s)
- U H Lerner
- Centre for Bone and Arthritis Research, Institute for Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.,Department of Molecular Periodontology, Umeå University, Umeå, Sweden
| | - C Ohlsson
- Centre for Bone and Arthritis Research, Institute for Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
50
|
Gori F, Lerner U, Ohlsson C, Baron R. A new WNT on the bone: WNT16, cortical bone thickness, porosity and fractures. BONEKEY REPORTS 2015; 4:669. [PMID: 25987984 DOI: 10.1038/bonekey.2015.36] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 02/13/2015] [Indexed: 12/28/2022]
Abstract
The last decade has provided abundant data implicating the WNT pathway in bone development and in the regulation of skeletal homeostasis. Rare human mutations together with gain- and loss-of-function approaches in mice have clearly demonstrated that disrupted regulation of this pathway leads to altered bone mass. In addition to these rare human and mice mutations, large population-based genome-wide association studies (GWASs) have identified single-nucleotide polymorphisms in ∼60 loci strongly associated with variations in bone mineral density (BMD) at different skeletal sites. Among the loci/genes identified by BMD GWAS, components of the WNT signaling pathway are numerous and have been shown to contribute to skeletal development and homeostasis. Within the components of WNT signaling, the gene coding for WNT16, one of the 19 WNT ligands of the human genome, has been found strongly associated with specific bone traits such as cortical bone thickness, cortical porosity and fracture risk. Recently, the first functional characterization of Wnt16 has confirmed the critical role of Wnt16 in the regulation of cortical bone mass and bone strength in mice. These reports have extended our understanding of Wnt16 function in bone homeostasis and have not only confirmed the unique association of Wnt16 with cortical bone and fracture susceptibility, as suggested by GWAS in human populations, but have also provided novel insights into the biology of this WNT ligand and the mechanism(s) by which it regulates cortical but not trabecular bone homeostasis. Most interestingly, Wnt16 appears to be a strong anti-resorptive soluble factor acting on both osteoblasts and osteoclast precursors.
Collapse
Affiliation(s)
- Francesca Gori
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine , Boston, MA, USA
| | - Ulf Lerner
- Centre for Bone and Arthritis Research at Institute of Medicine, Sahlgrenska Academy at University of Gothenburg , Gothenburg, Sweden ; Molecular Periodontology, Umea University , Umea, Sweden
| | - Claes Ohlsson
- Centre for Bone and Arthritis Research at Institute of Medicine, Sahlgrenska Academy at University of Gothenburg , Gothenburg, Sweden
| | - Roland Baron
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine , Boston, MA, USA ; Department of Medicine, Endocrine Unit, Massachusetts General Hospital, Harvard Medical School , Boston, MA, USA
| |
Collapse
|