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Muñoz Forti K, Weisman GA, Jasmer KJ. Cell type-specific transforming growth factor-β (TGF-β) signaling in the regulation of salivary gland fibrosis and regeneration. J Oral Biol Craniofac Res 2024; 14:257-272. [PMID: 38559587 PMCID: PMC10979288 DOI: 10.1016/j.jobcr.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 01/13/2024] [Accepted: 03/09/2024] [Indexed: 04/04/2024] Open
Abstract
Salivary gland damage and hypofunction result from various disorders, including autoimmune Sjögren's disease (SjD) and IgG4-related disease (IgG4-RD), as well as a side effect of radiotherapy for treating head and neck cancers. There are no therapeutic strategies to prevent the loss of salivary gland function in these disorders nor facilitate functional salivary gland regeneration. However, ongoing aquaporin-1 gene therapy trials to restore saliva flow show promise. To identify and develop novel therapeutic targets, we must better understand the cell-specific signaling processes involved in salivary gland regeneration. Transforming growth factor-β (TGF-β) signaling is essential to tissue fibrosis, a major endpoint in salivary gland degeneration, which develops in the salivary glands of patients with SjD, IgG4-RD, and radiation-induced damage. Though the deposition and remodeling of extracellular matrix proteins are essential to repair salivary gland damage, pathological fibrosis results in tissue hardening and chronic salivary gland dysfunction orchestrated by multiple cell types, including fibroblasts, myofibroblasts, endothelial cells, stromal cells, and lymphocytes, macrophages, and other immune cell populations. This review is focused on the role of TGF-β signaling in the development of salivary gland fibrosis and the potential for targeting TGF-β as a novel therapeutic approach to regenerate functional salivary glands. The studies presented highlight the divergent roles of TGF-β signaling in salivary gland development and dysfunction and illuminate specific cell populations in damaged or diseased salivary glands that mediate the effects of TGF-β. Overall, these studies strongly support the premise that blocking TGF-β signaling holds promise for the regeneration of functional salivary glands.
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Affiliation(s)
- Kevin Muñoz Forti
- Christopher S. Bond Life Sciences Center and Department of Biochemistry, University of Missouri, United States
| | - Gary A. Weisman
- Christopher S. Bond Life Sciences Center and Department of Biochemistry, University of Missouri, United States
| | - Kimberly J. Jasmer
- Christopher S. Bond Life Sciences Center and Department of Biochemistry, University of Missouri, United States
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Marañón-Vásquez GA, de Souza Araújo MT, de Oliveira Ruellas AC, Matsumoto MAN, Figueiredo M, Meyfarth SRS, Antunes LAA, Baratto-Filho F, Scariot R, Flores-Mir C, Kirschneck C, Santos Antunes L, Küchler EC. BMP2 rs1005464 is associated with mandibular condyle size variation. Sci Rep 2024; 14:5987. [PMID: 38472272 DOI: 10.1038/s41598-024-56530-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 03/07/2024] [Indexed: 03/14/2024] Open
Abstract
This study aimed to evaluate the association between single nucleotide polymorphisms (SNPs) in endochondral development-related genes and mandibular condyle shape, size, volume, and symmetry traits. Cone-beam Computed Tomographies and genomic DNA from 118 individuals were evaluated (age range: 15-66 years). Data from twelve 3D landmarks on mandibular condyles were submitted to morphometric analyses including Procrustes fit, principal component analysis, and estimation of centroid sizes and fluctuating asymmetry scores. Condylar volumes were additionally measured. Seven SNPs across BMP2, BMP4, RUNX2 and SMAD6 were genotyped. Linear models were fit to evaluate the effect of the SNPs on the mandibular condyles' quantitative traits. Only the association between BMP2 rs1005464 and centroid size remained significant after adjusting to account for the false discovery rate due to multiple testing. Individuals carrying at least one A allele for this SNP showed larger condylar size than common homozygotes GG (β = 0.043; 95% CI: 0.014-0.071; P value = 0.028). The model including BMP2 rs1005464, age and sex of the participants explained 17% of the variation in condylar size. Shape, volume, and symmetry were not associated with the evaluated SNPs. These results suggest that BMP2 rs1005464 might be associated with variation in the mandibular condyles size.
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Affiliation(s)
- Guido Artemio Marañón-Vásquez
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rua. Prof. Rodolpho Paulo Rocco, 325 - Cidade Universitária da Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-617, Brazil
| | - Mônica Tirre de Souza Araújo
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rua. Prof. Rodolpho Paulo Rocco, 325 - Cidade Universitária da Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-617, Brazil
| | - Antônio Carlos de Oliveira Ruellas
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rua. Prof. Rodolpho Paulo Rocco, 325 - Cidade Universitária da Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-617, Brazil
| | - Mírian Aiko Nakane Matsumoto
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n., Ribeirão Preto, São Paulo, 14040-904, Brazil
| | - Marcio Figueiredo
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n., Ribeirão Preto, São Paulo, 14040-904, Brazil
| | - Sandra Regina Santos Meyfarth
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Rua. Dr. Silvio Henrique Braune, 22 - Centro, Nova Friburgo, Rio de Janeiro, 28625-650, Brazil
| | - Lívia Azeredo Alves Antunes
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Rua. Dr. Silvio Henrique Braune, 22 - Centro, Nova Friburgo, Rio de Janeiro, 28625-650, Brazil
| | - Flares Baratto-Filho
- Post-Graduation Program, Tuiuti University of Paraná, R. Padre Ladislau Kula, 395 - Santo Inácio, Curitiba, Brazil
- School of Dentistry, Univille - Univille - University of the Joinville Region, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, Santa Catarina, 89219-710, Brazil
| | - Rafaela Scariot
- Department of Stomatology, School of Dentistry, Federal University of Paraná, Av. Prefeito Lothário Meissner, 632 - Jardim Botânico, Curitiba, PR, 80210-170, Brazil
| | - Carlos Flores-Mir
- Graduate Orthodontic Program, School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, 5-528 Edmonton Clinic Health Academy, 11405 87 Ave NW, Edmonton, AB, T6G 1C9, Canada
| | - Christian Kirschneck
- Department of Orthodontics, Medical Faculty, University Hospital Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - Leonardo Santos Antunes
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Rua. Dr. Silvio Henrique Braune, 22 - Centro, Nova Friburgo, Rio de Janeiro, 28625-650, Brazil
| | - Erika Calvano Küchler
- Department of Orthodontics, Medical Faculty, University Hospital Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany.
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Wu M, Wu S, Chen W, Li YP. The roles and regulatory mechanisms of TGF-β and BMP signaling in bone and cartilage development, homeostasis and disease. Cell Res 2024; 34:101-123. [PMID: 38267638 PMCID: PMC10837209 DOI: 10.1038/s41422-023-00918-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 12/15/2023] [Indexed: 01/26/2024] Open
Abstract
Transforming growth factor-βs (TGF-βs) and bone morphometric proteins (BMPs) belong to the TGF-β superfamily and perform essential functions during osteoblast and chondrocyte lineage commitment and differentiation, skeletal development, and homeostasis. TGF-βs and BMPs transduce signals through SMAD-dependent and -independent pathways; specifically, they recruit different receptor heterotetramers and R-Smad complexes, resulting in unique biological readouts. BMPs promote osteogenesis, osteoclastogenesis, and chondrogenesis at all differentiation stages, while TGF-βs play different roles in a stage-dependent manner. BMPs and TGF-β have opposite functions in articular cartilage homeostasis. Moreover, TGF-β has a specific role in maintaining the osteocyte network. The precise activation of BMP and TGF-β signaling requires regulatory machinery at multiple levels, including latency control in the matrix, extracellular antagonists, ubiquitination and phosphorylation in the cytoplasm, nucleus-cytoplasm transportation, and transcriptional co-regulation in the nuclei. This review weaves the background information with the latest advances in the signaling facilitated by TGF-βs and BMPs, and the advanced understanding of their diverse physiological functions and regulations. This review also summarizes the human diseases and mouse models associated with disordered TGF-β and BMP signaling. A more precise understanding of the BMP and TGF-β signaling could facilitate the development of bona fide clinical applications in treating bone and cartilage disorders.
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Affiliation(s)
- Mengrui Wu
- Department of Cell and Developmental Biology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China.
| | - Shali Wu
- Department of Cell and Developmental Biology, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Wei Chen
- Division in Cellular and Molecular Medicine, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, Tulane University, New Orleans, LA, USA
| | - Yi-Ping Li
- Division in Cellular and Molecular Medicine, Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, Tulane University, New Orleans, LA, USA.
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Lu T, Forgetta V, Zhou S, Richards JB, Greenwood CM. Identifying Rare Genetic Determinants for Improved Polygenic Risk Prediction of Bone Mineral Density and Fracture Risk. J Bone Miner Res 2023; 38:1771-1781. [PMID: 37830501 DOI: 10.1002/jbmr.4920] [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: 01/20/2023] [Revised: 09/13/2023] [Accepted: 10/06/2023] [Indexed: 10/14/2023]
Abstract
Osteoporosis and fractures severely impact the elderly population. Polygenic risk scores for bone mineral density have demonstrated potential clinical utility. However, the value of rare genetic determinants in risk prediction has not been assessed. With whole-exome sequencing data from 436,824 UK Biobank participants, we assigned White British ancestry individuals into a training data set (n = 317,434) and a test data set (n = 74,825). In the training data set, we developed a common variant-based polygenic risk score for heel ultrasound speed of sound (SOS). Next, we performed burden testing to identify genes harboring rare determinants of bone mineral density, targeting influential rare variants with predicted high deleteriousness. We constructed a genetic risk score, called ggSOS, to incorporate influential rare variants in significant gene burden masks into the common variant-based polygenic risk score. We assessed the predictive performance of ggSOS in the White British test data set, as well as in populations of non-White British European (n = 18,885), African (n = 7165), East Asian (n = 2236), South Asian (n = 9829), and other admixed (n = 1481) ancestries. Twelve genes in pivotal regulatory pathways of bone homeostasis harbored influential rare variants associated with SOS (p < 5.5 × 10-7 ), including AHNAK, BMP5, CYP19A1, FAM20A, FBXW5, KDM5B, KREMEN1, LGR4, LRP5, SMAD6, SOST, and WNT1. Among 4013 (5.4%) individuals in the test data set carrying these variants, a one standard deviation decrease in ggSOS was associated with 1.35-fold (95% confidence interval [CI] 1.16-1.57) increased hazard of major osteoporotic fracture. However, compared with a common variant-based polygenic risk score (C-index = 0.641), ggSOS had only marginally improved prediction accuracy in identifying at-risk individuals (C-index = 0.644), with overlapping confidence intervals. Similarly, ggSOS did not demonstrate substantially improved predictive performance in non-European ancestry populations. In summary, modeling the effects of rare genetic determinants may assist polygenic prediction of fracture risk among carriers of influential rare variants. Nonetheless, improved clinical utility is not guaranteed for population-level risk screening. © 2023 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Tianyuan Lu
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
- Department of Statistical Sciences, University of Toronto, Toronto, ON, Canada
| | | | - Sirui Zhou
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - J Brent Richards
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
- 5 Prime Sciences Inc., Montreal, QC, Canada
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
- Department of Twin Research and Genetic Epidemiology, King's College London, London, UK
| | - Celia Mt Greenwood
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
- Gerald Bronfman Department of Oncology, McGill University, Montreal, QC, Canada
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Zhao J, Duan X, Yan S, Liu Y, Wang K, Hu M, Chai Q, Liu L, Ge C, Jia J, Dou T. Transcriptomics reveals the molecular regulation of Chinese medicine formula on improving bone quality in broiler. Poult Sci 2023; 102:103044. [PMID: 37717480 PMCID: PMC10507442 DOI: 10.1016/j.psj.2023.103044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/12/2023] [Accepted: 08/15/2023] [Indexed: 09/19/2023] Open
Abstract
Skeletal disorder is of concern to the poultry industry as it affects animal welfare and production performance. Traditional Chinese medicine could improve bone quality and reduce the incidence of bone disease, but the molecular regulation of Chinese medicine formula (CMF) on improving bone quality in broilers is still unclear. This study was performed to research the effects of CMF on skeletal performance of Cobb broilers and reveal the molecular regulation. A total of 120 one-day-old Cobb broilers were randomly allocated into 4 equal groups of 30 chickens, with 5 replicates and 6 chickens in each replicate. The control (CON) group was fed a diet without CMF, while the CMF1, CMF2, and CMF3 groups were supplemented with different CMF at 6,000 mg/kg diet, respectively. The broilers were raised to 60 d of age, then bone tissues were collected for biomechanical properties, micro-CT detection and transcriptomic sequencing analysis. The results showed that CMF3 improved the biomechanical properties of broiler tibia, via increasing the elastic modulus (P < 0.05), yield strength (P > 0.05), maximum stress (P < 0.05) and fracture stress (P < 0.05) of the tibia. Micro-CT analysis indicated that CMF3 increased the bone mineral density (BMD), bone volume/total volume (BV/TV), bone surface density (BS/TV), trabecular number (Tb.N), trabecular thickness (Tb.Th), and decreased the trabecular separation (Tb.Sp) of femur cancellous bone (P < 0.05). RNA-seq analysis revealed 2,177 differentially expressed genes (DEGs) (|log2FoldChange| ≥ 1, FDR < 0.05) between the CMF3 group and CON group. Kyoto Encyclopedia of Genes and Genomes pathway (KEGG) analysis showed 13 pathways mostly associated with bone growth and development and bone metabolism, and we identified 39 bone-related DEGs. This study suggests that CMF3 could improve bone strength and bone microstructure of broilers, and showed a positive effect on bone performance. Our research could provide a theoretical reference for the development of pollution-free feed additives to improve the skeletal performance of broilers, which could help promote healthy farming of chickens.
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Affiliation(s)
- Jingying Zhao
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China
| | - Xiaohua Duan
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China; Yunnan University of Chinese Medicine, 650500 Kunming, China
| | - Shixiong Yan
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China
| | - Yong Liu
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China
| | - Kun Wang
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China
| | - Mei Hu
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China
| | - Qian Chai
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China
| | - Lixian Liu
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China; Yunnan Vocational and Technical College of Agriculture, 650031 Kunming, China
| | - Changrong Ge
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China
| | - Junjing Jia
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China
| | - Tengfei Dou
- Faculty of Animal Science and Technology, Yunnan Agricultural University, 650201 Kunming, China.
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Ueharu H, Mishina Y. BMP signaling during craniofacial development: new insights into pathological mechanisms leading to craniofacial anomalies. Front Physiol 2023; 14:1170511. [PMID: 37275223 PMCID: PMC10232782 DOI: 10.3389/fphys.2023.1170511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/10/2023] [Indexed: 06/07/2023] Open
Abstract
Cranial neural crest cells (NCCs) are the origin of the anterior part of the face and the head. Cranial NCCs are multipotent cells giving rise to bones, cartilage, adipose-tissues in the face, and neural cells, melanocytes, and others. The behavior of cranial NCCs (proliferation, cell death, migration, differentiation, and cell fate specification) are well regulated by several signaling pathways; abnormalities in their behavior are often reported as causative reasons for craniofacial anomalies (CFAs), which occur in 1 in 100 newborns in the United States. Understanding the pathological mechanisms of CFAs would facilitate strategies for identifying, preventing, and treating CFAs. Bone morphogenetic protein (BMP) signaling plays a pleiotropic role in many cellular processes during embryonic development. We and others have reported that abnormalities in BMP signaling in cranial NCCs develop CFAs in mice. Abnormal levels of BMP signaling cause miscorrelation with other signaling pathways such as Wnt signaling and FGF signaling, which mutations in the signaling pathways are known to develop CFAs in mice and humans. Recent Genome-Wide Association Studies and exome sequencing demonstrated that some patients with CFAs presented single nucleotide polymorphisms (SNPs), missense mutations, and duplication of genes related to BMP signaling activities, suggesting that defects in abnormal BMP signaling in human embryos develop CFAs. There are still a few cases of BMP-related patients with CFAs. One speculation is that human embryos with mutations in coding regions of BMP-related genes undergo embryonic lethality before developing the craniofacial region as well as mice development; however, no reports are available that show embryonic lethality caused by BMP mutations in humans. In this review, we will summarize the recent advances in the understanding of BMP signaling during craniofacial development in mice and describe how we can translate the knowledge from the transgenic mice to CFAs in humans.
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Luyckx I, Verstraeten A, Goumans MJ, Loeys B. SMAD6-deficiency in human genetic disorders. NPJ Genom Med 2022; 7:68. [DOI: 10.1038/s41525-022-00338-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 11/08/2022] [Indexed: 11/23/2022] Open
Abstract
AbstractSMAD6 encodes an intracellular inhibitor of the bone morphogenetic protein (BMP) signalling pathway. Until now, SMAD6-deficiency has been associated with three distinctive human congenital conditions, i.e., congenital heart diseases, including left ventricular obstruction and conotruncal defects, craniosynostosis and radioulnar synostosis. Intriguingly, a similar spectrum of heterozygous loss-of-function variants has been reported to cause these clinically distinct disorders without a genotype–phenotype correlation. Even identical nucleotide changes have been described in patients with either a cardiovascular phenotype, craniosynostosis or radioulnar synostosis. These findings suggest that the primary pathogenic variant alone cannot explain the resultant patient phenotype. In this review, we summarise clinical and (patho)genetic (dis)similarities between these three SMAD6-related conditions, compare published Madh6 mouse models, in which the importance and impact of the genetic background with respect to the observed phenotype is highlighted, and elaborate on the cellular key mechanisms orchestrated by SMAD6 in the development of these three discrete inherited disorders. In addition, we discuss future research needed to elucidate the pathogenetic mechanisms underlying these diseases in order to improve their molecular diagnosis, advance therapeutic strategies and facilitate counselling of patients and their families.
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Wawrzyniak A, Balawender K. Structural and Metabolic Changes in Bone. Animals (Basel) 2022; 12:ani12151946. [PMID: 35953935 PMCID: PMC9367262 DOI: 10.3390/ani12151946] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/24/2022] [Accepted: 07/27/2022] [Indexed: 12/23/2022] Open
Abstract
Simple Summary Bone is an extremely metabolically active tissue that is regenerated and repaired over its lifetime by bone remodeling. Most bone diseases are caused by abnormal restructure processes that undermine bone structure and mechanical strength and trigger clinical symptoms, such as pain, deformity, fracture, and abnormalities of calcium and phosphate homoeostasis. The article examines the main aspects of bone development, anatomy, structure, and the mechanisms of cell and molecular regulation of bone remodeling. Abstract As an essential component of the skeleton, bone tissue provides solid support for the body and protects vital organs. Bone tissue is a reservoir of calcium, phosphate, and other ions that can be released or stored in a controlled manner to provide constant concentration in body fluids. Normally, bone development or osteogenesis occurs through two ossification processes (intra-articular and intra-chondral), but the first produces woven bone, which is quickly replaced by stronger lamellar bone. Contrary to commonly held misconceptions, bone is a relatively dynamic organ that undergoes significant turnover compared to other organs in the body. Bone metabolism is a dynamic process that involves simultaneous bone formation and resorption, controlled by numerous factors. Bone metabolism comprises the key actions. Skeletal mass, structure, and quality are accrued and maintained throughout life, and the anabolic and catabolic actions are mostly balanced due to the tight regulation of the activity of osteoblasts and osteoclasts. This activity is also provided by circulating hormones and cytokines. Bone tissue remodeling processes are regulated by various biologically active substances secreted by bone tissue cells, namely RANK, RANKL, MMP-1, MMP-9, or type 1 collagen. Bone-derived factors (BDF) influence bone function and metabolism, and pathophysiological conditions lead to bone dysfunction. This work aims to analyze and evaluate the current literature on various local and systemic factors or immune system interactions that can affect bone metabolism and its impairments.
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Genetic Interaction of Thm2 and Thm1 Shapes Postnatal Craniofacial Bone. J Dev Biol 2022; 10:jdb10020017. [PMID: 35645293 PMCID: PMC9149932 DOI: 10.3390/jdb10020017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/04/2022] [Accepted: 05/09/2022] [Indexed: 11/17/2022] Open
Abstract
Ciliopathies are genetic syndromes that link skeletal dysplasias to the dysfunction of primary cilia. Primary cilia are sensory organelles synthesized by intraflagellar transport (IFT)—A and B complexes, which traffic protein cargo along a microtubular core. We have reported that the deletion of the IFT-A gene, Thm2, together with a null allele of its paralog, Thm1, causes a small skeleton with a small mandible or micrognathia in juvenile mice. Using micro-computed tomography, here we quantify the craniofacial defects of Thm2−/−; Thm1aln/+ triple allele mutant mice. At postnatal day 14, triple allele mutant mice exhibited micrognathia, midface hypoplasia, and a decreased facial angle due to shortened upper jaw length, premaxilla, and nasal bones, reflecting altered development of facial anterior-posterior elements. Mutant mice also showed increased palatal width, while other aspects of the facial transverse, as well as vertical dimensions, remained intact. As such, other ciliopathy-related craniofacial defects, such as cleft lip and/or palate, hypo-/hypertelorism, broad nasal bridge, craniosynostosis, and facial asymmetry, were not observed. Calvarial-derived osteoblasts of triple allele mutant mice showed reduced bone formation in vitro that was ameliorated by Hedgehog agonist, SAG. Together, these data indicate that Thm2 and Thm1 genetically interact to regulate bone formation and sculpting of the postnatal face. The triple allele mutant mice present a novel model to study craniofacial bone development.
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Zieba J, Forlenza KN, Heard K, Martin JH, Bosakova M, Cohn DH, Robertson SP, Krejci P, Krakow D. Intervertebral disc degeneration is rescued by TGFβ/BMP signaling modulation in an ex vivo filamin B mouse model. Bone Res 2022; 10:37. [PMID: 35474298 PMCID: PMC9042866 DOI: 10.1038/s41413-022-00200-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 11/01/2021] [Accepted: 01/06/2022] [Indexed: 12/14/2022] Open
Abstract
Spondylocarpotarsal syndrome (SCT) is a rare musculoskeletal disorder characterized by short stature and vertebral, carpal, and tarsal fusions resulting from biallelic nonsense mutations in the gene encoding filamin B (FLNB). Utilizing a FLNB knockout mouse, we showed that the vertebral fusions in SCT evolved from intervertebral disc (IVD) degeneration and ossification of the annulus fibrosus (AF), eventually leading to full trabecular bone formation. This resulted from alterations in the TGFβ/BMP signaling pathway that included increased canonical TGFβ and noncanonical BMP signaling. In this study, the role of FLNB in the TGFβ/BMP pathway was elucidated using in vitro, in vivo, and ex vivo treatment methodologies. The data demonstrated that FLNB interacts with inhibitory Smads 6 and 7 (i-Smads) to regulate TGFβ/BMP signaling and that loss of FLNB produces increased TGFβ receptor activity and decreased Smad 1 ubiquitination. Through the use of small molecule inhibitors in an ex vivo spine model, TGFβ/BMP signaling was modulated to design a targeted treatment for SCT and disc degeneration. Inhibition of canonical and noncanonical TGFβ/BMP pathway activity restored Flnb-/- IVD morphology. These most effective improvements resulted from specific inhibition of TGFβ and p38 signaling activation. FLNB acts as a bridge for TGFβ/BMP signaling crosstalk through i-Smads and is key for the critical balance in TGFβ/BMP signaling that maintains the IVD. These findings further our understanding of IVD biology and reveal new molecular targets for disc degeneration as well as congenital vertebral fusion disorders.
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Affiliation(s)
- Jennifer Zieba
- Department of Orthopedic Surgery, Los Angeles, CA, 90095, USA
| | | | - Kelly Heard
- Department of Orthopedic Surgery, Los Angeles, CA, 90095, USA
| | - Jorge H Martin
- Department of Orthopedic Surgery, Los Angeles, CA, 90095, USA
| | - Michaela Bosakova
- Department of Biology, Faculty of Medicine, Masaryk University, 62500, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, 65691, Brno, Czech Republic
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, 60200, Brno, Czech Republic
| | - Daniel H Cohn
- Department of Orthopedic Surgery, Los Angeles, CA, 90095, USA
- Department of Molecular Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Stephen P Robertson
- Department of Women's and Children's Health, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Pavel Krejci
- Department of Biology, Faculty of Medicine, Masaryk University, 62500, Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital, 65691, Brno, Czech Republic
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, 60200, Brno, Czech Republic
| | - Deborah Krakow
- Department of Orthopedic Surgery, Los Angeles, CA, 90095, USA.
- Department of Human Genetics, Los Angeles, CA, 90095, USA.
- Department of Obstetrics and Gynecology, Los Angeles, CA, 90095, USA.
- Department of Pediatrics, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, CA, 90095, USA.
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Kulikauskas MR, X S, Bautch VL. The versatility and paradox of BMP signaling in endothelial cell behaviors and blood vessel function. Cell Mol Life Sci 2022; 79:77. [PMID: 35044529 PMCID: PMC8770421 DOI: 10.1007/s00018-021-04033-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 10/20/2021] [Accepted: 11/09/2021] [Indexed: 12/15/2022]
Abstract
Blood vessels expand via sprouting angiogenesis, and this process involves numerous endothelial cell behaviors, such as collective migration, proliferation, cell–cell junction rearrangements, and anastomosis and lumen formation. Subsequently, blood vessels remodel to form a hierarchical network that circulates blood and delivers oxygen and nutrients to tissue. During this time, endothelial cells become quiescent and form a barrier between blood and tissues that regulates transport of liquids and solutes. Bone morphogenetic protein (BMP) signaling regulates both proangiogenic and homeostatic endothelial cell behaviors as blood vessels form and mature. Almost 30 years ago, human pedigrees linked BMP signaling to diseases associated with blood vessel hemorrhage and shunts, and recent work greatly expanded our knowledge of the players and the effects of vascular BMP signaling. Despite these gains, there remain paradoxes and questions, especially with respect to how and where the different and opposing BMP signaling outputs are regulated. This review examines endothelial cell BMP signaling in vitro and in vivo and discusses the paradox of BMP signals that both destabilize and stabilize endothelial cell behaviors.
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Affiliation(s)
- Molly R Kulikauskas
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Shaka X
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - Victoria L Bautch
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- McAllister Heart Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
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12
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Shen F, Yang Y, Li P, Zheng Y, Luo Z, Fu Y, Zhu G, Mei H, Chen S, Zhu Y. A genotype and phenotype analysis of SMAD6 mutant patients with radioulnar synostosis. Mol Genet Genomic Med 2021; 10:e1850. [PMID: 34953066 PMCID: PMC8801148 DOI: 10.1002/mgg3.1850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/21/2021] [Accepted: 12/14/2021] [Indexed: 12/16/2022] Open
Abstract
Background SMAD6 variants have been reported in patients with radioulnar synostosis (RUS). This study aimed to investigate the genotypes and phenotypes for a large cohort of patients with RUS having mutant SMAD6. Methods Genomic DNA samples were isolated from 251 RUS sporadic patients (with their parents) and 27 RUS pedigrees. Sanger sequencing was performed for the SMAD6 coding regions. For positive probands, co‐segregation and parental‐origin analysis of SMAD6 variants and phenotypic re‐evaluation were performed for their family members. Results We identified 50 RUS probands with SMAD6 variants (13 co‐segregated with RUS in pedigrees and 37 in RUS‐sporadic patients). Based on the new and previous data, we identified SMAD6 mutated in 16/38 RUS pedigrees and 61/393 RUS sporadic patients, respectively. Overall, 93 SMAD6 mutant patients with RUS were identified, among which 29 patients had unilateral RUS, where the left side was more involved than the right side (left:right = 20:9). Female protective effects and non‐full penetrance were observed, in which only 6.90% mothers (vs. ~50% fathers) of SMAD6 mutant RUS probands had RUS. Pleiotropy was observed as a re‐evaluation of SMAD6 mutant families identified: (a) three families had axial skeletal malformations; (b) two families had polydactyly; and (c) eight families had other known malformations. Conclusion SMAD6 was mutated in 42.11% RUS pedigrees and 15.52% RUS sporadic patients. The RUS patients with SMAD6 variants exhibit both non‐full‐penetrance, variable expressivity, pleiotropy, female protective effects, and the left side is more susceptible than the right side.
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Affiliation(s)
- Fang Shen
- The Laboratory of Genetics and Metabolism, Institute of Pediatric Medicine of Hunan Province, Hunan Children's Hospital, Hengyang Medical School, University of South China, Changsha, China
| | - Yongjia Yang
- The Laboratory of Genetics and Metabolism, Institute of Pediatric Medicine of Hunan Province, Hunan Children's Hospital, Hengyang Medical School, University of South China, Changsha, China
| | - Pengcheng Li
- The Laboratory of Genetics and Metabolism, Institute of Pediatric Medicine of Hunan Province, Hunan Children's Hospital, Hengyang Medical School, University of South China, Changsha, China.,Department of Hand Surgery, Beijing Ji Shui Tan Hospital, Beijing, China
| | - Yu Zheng
- The Laboratory of Genetics and Metabolism, Institute of Pediatric Medicine of Hunan Province, Hunan Children's Hospital, Hengyang Medical School, University of South China, Changsha, China
| | - Zhenqing Luo
- The Laboratory of Genetics and Metabolism, Institute of Pediatric Medicine of Hunan Province, Hunan Children's Hospital, Hengyang Medical School, University of South China, Changsha, China
| | - Yuyan Fu
- The Laboratory of Genetics and Metabolism, Institute of Pediatric Medicine of Hunan Province, Hunan Children's Hospital, Hengyang Medical School, University of South China, Changsha, China
| | - Guanghui Zhu
- Department of orthopedics, Hunan Children's Hospital, Hengyang Meical School, University of South China, Changsha, China
| | - Haibo Mei
- Department of orthopedics, Hunan Children's Hospital, Hengyang Meical School, University of South China, Changsha, China
| | - Shanlin Chen
- Department of Hand Surgery, Beijing Ji Shui Tan Hospital, Beijing, China
| | - Yimin Zhu
- The Laboratory of Genetics and Metabolism, Institute of Pediatric Medicine of Hunan Province, Hunan Children's Hospital, Hengyang Medical School, University of South China, Changsha, China.,Emergency Research Institute of Hunan Province, Hunan People's Hospital, Changsha, China
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13
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Lees-Shepard JB, Flint K, Fisher M, Omi M, Richard K, Antony M, Chen PJ, Yadav S, Threadgill D, Maihle NJ, Dealy CN. Cross-talk between EGFR and BMP signals regulates chondrocyte maturation during endochondral ossification. Dev Dyn 2021; 251:75-94. [PMID: 34773433 DOI: 10.1002/dvdy.438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 09/27/2021] [Accepted: 10/15/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Progressive maturation of growth plate chondrocytes drives long bone growth during endochondral ossification. Signals from the epidermal growth factor receptor (EGFR), and from bone morphogenetic protein-2 (BMP2), are required for normal chondrocyte maturation. Here, we investigated cross-talk between EGFR and BMP2 signals in developing and adult growth plates. RESULTS Using in vivo mouse models of conditional cartilage-targeted EGFR or BMP2 loss, we show that canonical BMP signal activation is increased in the hypertrophic chondrocytes of EGFR-deficient growth plates; whereas EGFR signal activation is increased in the reserve, prehypertrophic and hypertrophic chondrocytes of BMP2-deficient growth plates. EGFR-deficient chondrocytes displayed increased BMP signal activation in vitro, accompanied by increased expression of IHH, COL10A1, and RUNX2. Hypertrophic differentiation and BMP signal activation were suppressed in normal chondrocyte cultures treated with the EGFR ligand betacellulin, effects that were partially blocked by simultaneous treatment with BMP2 or a chemical EGFR antagonist. CONCLUSIONS Cross-talk between EGFR and BMP2 signals occurs during chondrocyte maturation. In the reserve and prehypertrophic zones, BMP2 signals unilaterally suppress EGFR activity; in the hypertrophic zone, EGFR and BMP2 signals repress each other. This cross-talk may play a role in regulating chondrocyte maturation in developing and adult growth plates.
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Affiliation(s)
- John B Lees-Shepard
- Center for Regenerative Medicine and Skeletal Development, Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Kaitlyn Flint
- Department of Orthodontics, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Melanie Fisher
- Department of Orthodontics, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Minoru Omi
- Center for Regenerative Medicine and Skeletal Development, Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Kelsey Richard
- Center for Regenerative Medicine and Skeletal Development, Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Michelle Antony
- Department of Orthodontics, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Po Jung Chen
- Department of Orthodontics, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Sumit Yadav
- Department of Orthodontics, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - David Threadgill
- Department of Veterinary Pathology, Texas A&M University, College Station, Texas, USA.,Department of Molecular and Cellular Medicine, Texas A&M University, College Station, Texas, USA
| | - Nita J Maihle
- Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA.,Department of Cell & Molecular Biology, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Caroline N Dealy
- Department of Orthodontics, University of Connecticut Health Center, Farmington, Connecticut, USA.,Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT, USA.,Department of Biomedical Engineering, University of Connecticut Health Center, Farmington, CT, USA.,Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA
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14
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Küchler EC, Reis CLB, Silva-Sousa AC, Marañón-Vásquez GA, Matsumoto MAN, Sebastiani A, Scariot R, Paddenberg E, Proff P, Kirschneck C. Exploring the Association Between Genetic Polymorphisms in Genes Involved in Craniofacial Development and Isolated Tooth Agenesis. Front Physiol 2021; 12:723105. [PMID: 34539446 PMCID: PMC8440976 DOI: 10.3389/fphys.2021.723105] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/13/2021] [Indexed: 11/13/2022] Open
Abstract
Tooth agenesis is a common congenital anomaly in humans and is more common in oral cleft patients than in the general population. Many previous studies suggested that oral cleft and tooth agenesis share a similar genetic background. Therefore, this study explored the association between isolated tooth agenesis and genetic polymorphisms in genes that are crucial for craniofacial and tooth development. Panoramic radiographs, anamnesis, and genomic DNA from 273 patients were included. Patients were classified as tooth agenesis present, when at least one permanent tooth was congenitally missing. Patients with syndromes and oral cleft were excluded. Only unrelated patients were included. The genetic polymorphisms in BMP2 (rs235768 and rs1005464), BMP4 (rs17563), RUNX2 (rs59983488 and rs1200425), and SMAD6 (rs3934908 and rs2119261) were genotyped by real-time polymerase chain reaction. Genotype and allele distributions were compared between the tooth agenesis phenotypes and controls by Chi-square test. Haplotype and diplotype analysis were also performed, in addition to multivariate analysis (alpha of 0.05). A total of 86 tooth agenesis cases and 187 controls were evaluated. For the rs235768 in BMP2, patients carrying TT genotype have higher chance to present tooth agenesis [p < 0.001; prevalence ratio (PR) = 8.29; 95% confidence interval (CI) = 4.26–16.10]. The TT genotype in rs3934908 (SMAD6) was associated with higher chance to present third molar agenesis (p = 0.023; PR = 3.25; 95% CI = 1.17–8.99). BMP2 was also associated in haplotype and diplotype analysis with tooth agenesis. In conclusion, genetic polymorphisms in BMP2 and SMAD6 were associated with isolated tooth agenesis.
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Affiliation(s)
- Erika Calvano Küchler
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany.,Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Caio Luiz Bitencourt Reis
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Alice Corrêa Silva-Sousa
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Guido Artemio Marañón-Vásquez
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mirian Aiko Nakane Matsumoto
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Aline Sebastiani
- Department of Stomatology, Federal University of Paraná, Curitiba, Brazil
| | - Rafaela Scariot
- Department of Stomatology, Federal University of Paraná, Curitiba, Brazil
| | - Eva Paddenberg
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - Peter Proff
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - Christian Kirschneck
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
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15
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Ledesma-Colunga MG, Weidner H, Vujic Spasic M, Hofbauer LC, Baschant U, Rauner M. Shaping the bone through iron and iron-related proteins. Semin Hematol 2021; 58:188-200. [PMID: 34389111 DOI: 10.1053/j.seminhematol.2021.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/18/2021] [Accepted: 06/08/2021] [Indexed: 01/04/2023]
Abstract
Well-controlled iron levels are indispensable for health. Iron deficiency is the most common cause of anemia, whereas iron overload, either hereditary or secondary due to disorders of ineffective erythropoiesis, causes widespread organ failure. Bone is particularly sensitive to fluctuations in systemic iron levels as both iron deficiency and overload are associated with low bone mineral density and fragility. Recent studies have shown that not only iron itself, but also iron-regulatory proteins that are mutated in hereditary hemochromatosis can control bone mass. This review will summarize the current knowledge on the effects of iron on bone homeostasis and bone cell activities, and on the role of proteins that regulate iron homeostasis, i.e. hemochromatosis proteins and proteins of the bone morphogenetic protein pathway, on bone remodeling. As disorders of iron homeostasis are closely linked to bone fragility, deeper insights into common regulatory mechanisms may provide new opportunities to concurrently treat disorders affecting iron homeostasis and bone.
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Affiliation(s)
- Maria G Ledesma-Colunga
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany
| | - Heike Weidner
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany
| | - Maja Vujic Spasic
- Institute of Comparative Molecular Endocrinology, Ulm University, Ulm, Germany
| | - Lorenz C Hofbauer
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany
| | - Ulrike Baschant
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany
| | - Martina Rauner
- Divisions of Endocrinology and Molecular Bone Biology, Department of Medicine III & University Center for Healty Aging, Technische Universität Dresden, Dresden, Germany.
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16
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Herrera-Álvarez S, Karlsson E, Ryder OA, Lindblad-Toh K, Crawford AJ. How to Make a Rodent Giant: Genomic Basis and Tradeoffs of Gigantism in the Capybara, the World's Largest Rodent. Mol Biol Evol 2021; 38:1715-1730. [PMID: 33169792 PMCID: PMC8097284 DOI: 10.1093/molbev/msaa285] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Gigantism results when one lineage within a clade evolves extremely large body size relative to its small-bodied ancestors, a common phenomenon in animals. Theory predicts that the evolution of giants should be constrained by two tradeoffs. First, because body size is negatively correlated with population size, purifying selection is expected to be less efficient in species of large body size, leading to increased mutational load. Second, gigantism is achieved through generating a higher number of cells along with higher rates of cell proliferation, thus increasing the likelihood of cancer. To explore the genetic basis of gigantism in rodents and uncover genomic signatures of gigantism-related tradeoffs, we assembled a draft genome of the capybara (Hydrochoerus hydrochaeris), the world's largest living rodent. We found that the genome-wide ratio of nonsynonymous to synonymous mutations (ω) is elevated in the capybara relative to other rodents, likely caused by a generation-time effect and consistent with a nearly neutral model of molecular evolution. A genome-wide scan for adaptive protein evolution in the capybara highlighted several genes controlling postnatal bone growth regulation and musculoskeletal development, which are relevant to anatomical and developmental modifications for an increase in overall body size. Capybara-specific gene-family expansions included a putative novel anticancer adaptation that involves T-cell-mediated tumor suppression, offering a potential resolution to the increased cancer risk in this lineage. Our comparative genomic results uncovered the signature of an intragenomic conflict where the evolution of gigantism in the capybara involved selection on genes and pathways that are directly linked to cancer.
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Affiliation(s)
| | - Elinor Karlsson
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Oliver A Ryder
- San Diego Zoo Institute for Conservation Research, San Diego Zoo Global, Escondido, CA, USA
| | - Kerstin Lindblad-Toh
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Andrew J Crawford
- Department of Biological Sciences, Universidad de Los Andes, Bogotá, Colombia
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17
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Yin YH, Zhang XH, Wang XA, Li RH, Zhang YW, Shan XX, You XX, Huang XD, Wu AL, Wang M, Pan XF, Bian C, Jiang WS, Shi Q, Yang JX. Construction of a chromosome-level genome assembly for genome-wide identification of growth-related quantitative trait loci in Sinocyclocheilus grahami (Cypriniformes, Cyprinidae). Zool Res 2021; 42:262-266. [PMID: 33764016 PMCID: PMC8175956 DOI: 10.24272/j.issn.2095-8137.2020.321] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The Dianchi golden-line barbel, Sinocyclocheilus grahami (Regan, 1904), is one of the “Four Famous Fishes” of Yunnan Province, China. Given its economic value, this species has been artificially bred successfully since 2007, with a nationally selected breed (“S. grahami, Bayou No. 1”) certified in 2018. For the future utilization of this species, its growth rate, disease resistance, and wild adaptability need to be improved, which could be achieved with the help of molecular marker-assisted selection (MAS). In the current study, we constructed the first chromosome-level genome of S. grahami, assembled 48 pseudo-chromosomes, and obtained a genome assembly of 1.49 Gb. We also performed QTL-seq analysis of S. grahami using the highest and lowest bulks (i.e., largest and smallest size) in both a sibling and random population. We screened two quantitative trait loci (QTLs) (Chr3, 14.9–39.1 Mb and Chr17, 4.1–27.4 Mb) as the major growth-related locations. Several candidate genes (e.g., map2k5, stat1, phf21a, sox6, and smad6) were also identified, with functions related to growth, such as cell differentiation, neuronal development, skeletal muscle development, chondrogenesis, and immunity. These results built a solid foundation for in-depth MAS studies on the growth traits of S. grahami.
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Affiliation(s)
- Yan-Hui Yin
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Key Laboratory of Plateau Fish Breeding, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Engineering Research Center for Plateau-Lake Health and Restoration, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin-Hui Zhang
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, Guangdong 518083, China.,BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, Guangdong 518083, China
| | - Xiao-Ai Wang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Key Laboratory of Plateau Fish Breeding, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Engineering Research Center for Plateau-Lake Health and Restoration, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China
| | - Rui-Han Li
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, Guangdong 518083, China.,BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, Guangdong 518083, China
| | - Yuan-Wei Zhang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Key Laboratory of Plateau Fish Breeding, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Engineering Research Center for Plateau-Lake Health and Restoration, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China
| | - Xin-Xin Shan
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, Guangdong 518083, China.,BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, Guangdong 518083, China
| | - Xin-Xin You
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, Guangdong 518083, China.,BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, Guangdong 518083, China
| | - Xin-Di Huang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Key Laboratory of Plateau Fish Breeding, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Engineering Research Center for Plateau-Lake Health and Restoration, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - An-Li Wu
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Key Laboratory of Plateau Fish Breeding, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Engineering Research Center for Plateau-Lake Health and Restoration, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China
| | - Mo Wang
- Key Laboratory for Conserving Wildlife with Small Populations in Yunnan, Faculty of Biodiversity Conservation, Southwest Forestry University, Kunming, Yunnan 650224, China
| | - Xiao-Fu Pan
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Key Laboratory of Plateau Fish Breeding, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Engineering Research Center for Plateau-Lake Health and Restoration, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China
| | - Chao Bian
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, Guangdong 518083, China.,BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, Guangdong 518083, China
| | - Wan-Sheng Jiang
- Hunan Engineering Laboratory for Chinese Giant Salamander's Resource Protection and Comprehensive Utilization, and Key Laboratory of Hunan Forest and Chemical Industry Engineering, Jishou University, Zhangjiajie, Hunan 427000, China. E-mail:
| | - Qiong Shi
- Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, Guangdong 518083, China.,BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, Guangdong 518083, China
| | - Jun-Xing Yang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Innovative Academy of Seed Design, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Key Laboratory of Plateau Fish Breeding, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China.,Yunnan Engineering Research Center for Plateau-Lake Health and Restoration, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650224, China. E-mail:
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18
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Jiang N, Liu HX, Liang HY, Feng XH, Liu BY, Zhou YY. Osteogenic differentiation characteristics of hip joint capsule fibroblasts obtained from patients with ankylosing spondylitis. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:331. [PMID: 33708958 PMCID: PMC7944275 DOI: 10.21037/atm-20-7817] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background Autoimmune disease are fairly common and one that has an excessive degree of disability is Ankylosing spondylitis (AS). As the main cells in connective tissues, fibroblasts may play important roles in AS ossification. The conducted research aims to establish the osteogenic disparity characteristics of fibroblasts cultured in vitro, obtained via AS patients hip joint capsule, as well as investigating the pathological osteogenic molecular workings of AS. Methods AS patients hip joint capsules were acquired and fracture patients as the control with the finite fibroblast line were established by using tissue culture method. AS fibroblast proliferation, cycle and apoptosis, expression of osteogenic marker genes, osteogenic phenotypes, and the activation degree of the bone morphogenetic protein (BMP)/Smads signalling pathway were detected by flow cytometry, western blotting and real-time fluorescent quantitative polymerase chain reaction. Results Proliferative activity in AS fibroblasts were abnormally high, and the apoptotic rate decreased. Compared with normal fibroblasts, the mRNA expression of osteogenic marker genes, expression of osteogenic phenotypes, protein expression of core-binding factor a1 (Cbfa1), Smad1, Smad4, Smad5, phosphorylated (p) Smad1, and pSmad5 in AS fibroblasts were higher; however, the expression of Smad6 was lower. Moreover, recombinant human bone morphogenetic protein-2(rhBMP-2) stimulated Cbfa1 expression by normal and AS fibroblasts through the BMP/Smads signalling pathway. Conclusions The fibroblasts of hip joint capsules in patients with AS cultured in vitro have biologic characteristics of osteogenic differentiation and may be important target cells of AS ossification. The Activated BMP/Smads signalling pathway could potentially be a mechanism relating to fibroblasts differentiating into osteoblasts and an ossification mechanism for AS.
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Affiliation(s)
- Nan Jiang
- Department of Nephrology and Rheumatology, Second Affiliated Hospital of Tianjin University of TCM, Tianjin, China
| | - Hong-Xiao Liu
- Department of Rheumatology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Hui-Ying Liang
- Department of Traditional Chinese Medicine, Zhongshan City People's Hospital, Zhongshan, China
| | - Xing-Hua Feng
- Department of Rheumatology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Ben-Yong Liu
- Department of TCM internal medicine, Beijing Massage Hospital, Beijing, China
| | - Ying-Yan Zhou
- Department of Rheumatology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
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Küchler EC, Reis CLB, Carelli J, Scariot R, Nelson-Filho P, Coletta RD, Paza AO, Matsumoto MAN, Proff P, Kirschneck C. Potential interactions among single nucleotide polymorphisms in bone- and cartilage-related genes in skeletal malocclusions. Orthod Craniofac Res 2020; 24:277-287. [PMID: 33068497 DOI: 10.1111/ocr.12433] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/07/2020] [Accepted: 10/08/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To investigate SNPs in bone- and cartilage-related genes and their interaction in the aetiology of sagittal and vertical skeletal malocclusions. SETTINGS AND SAMPLE POPULATION This study included 143 patients and classified as follows: skeletal class I (n = 77), class II (n = 47) and class III (n = 19); maxillary retrusion (n = 39), protrusion (n = 52) and well-positioned maxilla (n = 52); mandibular retrognathism (n = 50), prognathism (n = 50) and well-positioned mandible (n = 43); normofacial (n = 72), dolichofacial (n = 55) and brachyfacial (n = 16). MATERIALS AND METHODS Steiner's ANB, SNA, SNB angles and Ricketts' NBa-PtGn angle were measured to determine the skeletal malocclusion and the vertical pattern. Nine SNPs in BMP2, BMP4, SMAD6, RUNX2, WNT3A and WNT11 were genotyped. Chi-squared test was used to compare genotypes among the groups. Multifactor dimensionality reduction (MDR) and binary logistic regression analysis, both using gender and age as co-variables, were also used. We performed Bonferroni correction for multiple testing. RESULTS Significant associations at P < .05 were observed for SNPs rs1005464 (P = .042) and rs235768 (P = .021) in BMP2 with mandibular retrognathism and for rs59983488 (RUNX2) with maxillary protrusion (P = .04) as well as for rs708111 (WNT3A) with skeletal class III (P = .02; dominant model), rs1533767 (WNT11) with a brachyfacial skeletal pattern (P = .01, OR = 0.10; dominant model) and for rs3934908 (SMAD6) with prognathism (P = .02; recessive model). After the Bonferroni correction, none of the SNPs remained associated. The MDR predicted some interaction for skeletal class II, dolichofacial and brachyfacial phenotypes. CONCLUSION Our results suggest that SNPs in BMP2, BMP4, SMAD6, RUNX2, WNT3A and WNT11 could be involved in the aetiology of sagittal and vertical malocclusions.
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Affiliation(s)
- Erika Calvano Küchler
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - Caio Luiz Bitencourt Reis
- Department of Clinic and Surgery, School of Dentistry, Federal University of Alfenas, Alfenas, Brazil
| | - Julia Carelli
- Department of Dentistry, School of Dentistry, Univille (Joinville University), Joinville, Brazil
| | - Rafaela Scariot
- Department of Stomatology, Federal University of Paraná, Curitiba, Brazil
| | - Paulo Nelson-Filho
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, USP - Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Ricardo D Coletta
- Department of Oral Diagnosis, School of Dentistry of Piracicaba, University of Campinas (UNICAMP), Campinas, Brazil
| | - Aleysson Olimpio Paza
- Department of Dentistry, School of Dentistry, Univille (Joinville University), Joinville, Brazil
| | - Mírian Aiko Nakane Matsumoto
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, USP - Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Peter Proff
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
| | - Christian Kirschneck
- Department of Orthodontics, University Medical Centre of Regensburg, Regensburg, Germany
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Hart CG, Karimi-Abdolrezaee S. Bone morphogenetic proteins: New insights into their roles and mechanisms in CNS development, pathology and repair. Exp Neurol 2020; 334:113455. [PMID: 32877654 DOI: 10.1016/j.expneurol.2020.113455] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/18/2020] [Accepted: 08/26/2020] [Indexed: 02/06/2023]
Abstract
Bone morphogenetic proteins (BMPs) are a highly conserved and diverse family of proteins that play essential roles in various stages of development including the formation and patterning of the central nervous system (CNS). Bioavailability and function of BMPs are regulated by input from a plethora of transcription factors and signaling pathways. Intriguingly, recent literature has uncovered novel roles for BMPs in regulating homeostatic and pathological responses in the adult CNS. Basal levels of BMP ligands and receptors are widely expressed in the adult brain and spinal cord with differential expression patterns across CNS regions, cell types and subcellular locations. Recent evidence indicates that several BMP isoforms are transiently or chronically upregulated in the aged or pathological CNS. Genetic knockout and pharmacological studies have elucidated that BMPs regulate several aspects of CNS injury and repair including cell survival and differentiation, reactive astrogliosis and glial scar formation, axon regeneration, and myelin preservation and repair. Several BMP isoforms can be upregulated in the injured or diseased CNS simultaneously yet exert complementary or opposing effects on the endogenous cell responses after injury. Emerging studies also show that dysregulation of BMPs is associated with various CNS pathologies. Interestingly, modulation of BMPs can lead to beneficial or detrimental effects on CNS injury and repair mechanisms in a ligand, temporally or spatially specific manner, which reflect the complexity of BMP signaling. Given the significance of BMPs in neurodevelopment, a better understanding of their role in the context of injury may provide new therapeutic targets for the pathologic CNS. This review will provide a timely overview on the foundation and recent advancements in knowledge regarding the role and mechanisms of BMP signaling in the developing and adult CNS, and their implications in pathological responses and repair processes after injury or diseases.
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Affiliation(s)
- Christopher G Hart
- Department of Physiology and Pathophysiology, Regenerative Medicine Program, Spinal Cord Research Centre, Children's Hospital Research Institute of Manitoba, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Soheila Karimi-Abdolrezaee
- Department of Physiology and Pathophysiology, Regenerative Medicine Program, Spinal Cord Research Centre, Children's Hospital Research Institute of Manitoba, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
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Wang W, Rigueur D, Lyons KM. TGFβ as a gatekeeper of BMP action in the developing growth plate. Bone 2020; 137:115439. [PMID: 32442550 PMCID: PMC7891678 DOI: 10.1016/j.bone.2020.115439] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 05/15/2020] [Accepted: 05/17/2020] [Indexed: 02/06/2023]
Abstract
The ligands that comprise the Transforming Growth Factor β superfamily highly govern the development of the embryonic growth plate. Members of this superfamily activate canonical TGFβ and/or BMP (Bone Morphogenetic Protein) signaling pathways. How these pathways interact with one another is an area of active investigation. These two signaling pathways have been described to negatively regulate one another through crosstalk involving Smad proteins, the primary intracellular effectors of canonical signaling. More recently, a mechanism for regulation of the BMP pathway through TGFβ and BMP receptor interactions has been described. Here in this review, we demonstrate examples of how TGFβ is a gatekeeper of BMP action in the developing growth plate at both the receptor and transcriptional levels.
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Affiliation(s)
- Weiguang Wang
- Department of Orthopaedic Surgery and Orthopaedic Institute for Children, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States of America
| | - Diana Rigueur
- Department of Molecular, Cell and Developmental Biology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States of America
| | - Karen M Lyons
- Department of Orthopaedic Surgery and Orthopaedic Institute for Children, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States of America; Department of Molecular, Cell and Developmental Biology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States of America.
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22
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Scaal M. Development of the amniote ventrolateral body wall. Dev Dyn 2020; 250:39-59. [PMID: 32406962 DOI: 10.1002/dvdy.193] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/30/2020] [Accepted: 04/30/2020] [Indexed: 12/16/2022] Open
Abstract
In vertebrates, the trunk consists of the musculoskeletal structures of the back and the ventrolateral body wall, which together enclose the internal organs of the circulatory, digestive, respiratory and urogenital systems. This review gives an overview on the development of the thoracic and abdominal wall during amniote embryogenesis. Specifically, I briefly summarize relevant historical concepts and the present knowledge on the early embryonic development of ribs, sternum, intercostal muscles and abdominal muscles with respect to anatomical bauplan, origin and specification of precursor cells, initial steps of pattern formation, and cellular and molecular regulation of morphogenesis.
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Affiliation(s)
- Martin Scaal
- Faculty of Medicine, Institute of Anatomy II, University of Cologne, Cologne, Germany
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23
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Levy R, Levet C, Cohen K, Freeman M, Mott R, Iraqi F, Gabet Y. A genome-wide association study in mice reveals a role for Rhbdf2 in skeletal homeostasis. Sci Rep 2020; 10:3286. [PMID: 32094386 PMCID: PMC7039944 DOI: 10.1038/s41598-020-60146-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 02/06/2020] [Indexed: 12/16/2022] Open
Abstract
Low bone mass and an increased risk of fracture are predictors of osteoporosis. Individuals who share the same bone-mineral density (BMD) vary in their fracture risk, suggesting that microstructural architecture is an important determinant of skeletal strength. Here, we utilized the rich diversity of the Collaborative Cross mice to identify putative causal genes that contribute to the risk of fractures. Using microcomputed tomography, we examined key structural features that pertain to bone quality in the femoral cortical and trabecular compartments of male and female mice. We estimated the broad-sense heritability to be 50–60% for all examined traits, and we identified five quantitative trait loci (QTL) significantly associated with six traits. We refined each QTL by combining information inferred from the ancestry of the mice, ranging from RNA-Seq data and published literature to shortlist candidate genes. We found strong evidence for new candidate genes, particularly Rhbdf2, whose close association with the trabecular bone volume fraction and number was strongly suggested by our analyses. We confirmed our findings with mRNA expression assays of Rhbdf2 in extreme-phenotype mice, and by phenotyping bones of Rhbdf2 knockout mice. Our results indicate that Rhbdf2 plays a decisive role in bone mass accrual and microarchitecture.
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Affiliation(s)
- Roei Levy
- Department of Anatomy and Anthropology, Tel Aviv University, Tel Aviv, 69978, Israel.
| | - Clemence Levet
- Dunn School of Pathology, South Parks Road, Oxford, OX1 3RE, UK
| | - Keren Cohen
- Department of Anatomy and Anthropology, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Matthew Freeman
- Dunn School of Pathology, South Parks Road, Oxford, OX1 3RE, UK
| | - Richard Mott
- UCL Genetics Institute, University College London, Gower St., London, WC1E 6BT, UK
| | - Fuad Iraqi
- Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Yankel Gabet
- Department of Anatomy and Anthropology, Tel Aviv University, Tel Aviv, 69978, Israel
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Wang C, Zheng GF, Xu XF. MicroRNA-186 improves fracture healing through activating the bone morphogenetic protein signalling pathway by inhibiting SMAD6 in a mouse model of femoral fracture: An animal study. Bone Joint Res 2019; 8:550-562. [PMID: 31832175 PMCID: PMC6888740 DOI: 10.1302/2046-3758.811.bjr-2018-0251.r1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Objectives MicroRNAs (miRNAs) have been reported as key regulators of bone formation, signalling, and repair. Fracture healing is a proliferative physiological process where the body facilitates the repair of a bone fracture. The aim of our study was to explore the effects of microRNA-186 (miR-186) on fracture healing through the bone morphogenetic protein (BMP) signalling pathway by binding to Smad family member 6 (SMAD6) in a mouse model of femoral fracture. Methods Microarray analysis was adopted to identify the regulatory miR of SMAD6. 3D micro-CT was performed to assess the bone volume (BV), bone volume fraction (BVF, BV/TV), and bone mineral density (BMD), followed by a biomechanical test for maximum load, maximum radial degrees, elastic radial degrees, and rigidity of the femur. The positive expression of SMAD6 in fracture tissues was measured. Moreover, the miR-186 level, messenger RNA (mRNA) level, and protein levels of SMAD6, BMP-2, and BMP-7 were examined. Results MicroRNA-186 was predicted to regulate SMAD6. Furthermore, SMAD6 was verified as a target gene of miR-186. Overexpressed miR-186 and SMAD6 silencing resulted in increased callus formation, BMD and BV/TV, as well as maximum load, maximum radial degrees, elastic radial degrees, and rigidity of the femur. In addition, the mRNA and protein levels of SMAD6 were decreased, while BMP-2 and BMP-7 levels were elevated in response to upregulated miR-186 and SMAD6 silencing. Conclusion In conclusion, the study indicated that miR-186 could activate the BMP signalling pathway to promote fracture healing by inhibiting SMAD6 in a mouse model of femoral fracture. Cite this article: Bone Joint Res 2019;8:550–562.
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Affiliation(s)
- C Wang
- MRI Department, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - G-F Zheng
- Department of Orthopedics, The Yuhang Hospital Affiliated to Medical College of Hangzhou Normal University, Hangzhou, China
| | - X-F Xu
- Department of Clinical Laboratory, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College of Fudan University, Shanghai, China
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25
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Growth Plate Chondrocytes: Skeletal Development, Growth and Beyond. Int J Mol Sci 2019; 20:ijms20236009. [PMID: 31795305 PMCID: PMC6929081 DOI: 10.3390/ijms20236009] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 11/22/2019] [Accepted: 11/27/2019] [Indexed: 02/01/2023] Open
Abstract
Growth plate chondrocytes play central roles in the proper development and growth of endochondral bones. Particularly, a population of chondrocytes in the resting zone expressing parathyroid hormone-related protein (PTHrP) is now recognized as skeletal stem cells, defined by their ability to undergo self-renewal and clonally give rise to columnar chondrocytes in the postnatal growth plate. These chondrocytes also possess the ability to differentiate into a multitude of cell types including osteoblasts and bone marrow stromal cells during skeletal development. Using single-cell transcriptomic approaches and in vivo lineage tracing technology, it is now possible to further elucidate their molecular properties and cellular fate changes. By discovering the fundamental molecular characteristics of these cells, it may be possible to harness their functional characteristics for skeletal growth and regeneration. Here, we discuss our current understanding of the molecular signatures defining growth plate chondrocytes.
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26
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The TGFβ type I receptor TGFβRI functions as an inhibitor of BMP signaling in cartilage. Proc Natl Acad Sci U S A 2019; 116:15570-15579. [PMID: 31311865 PMCID: PMC6681752 DOI: 10.1073/pnas.1902927116] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The TGFβ signaling pathway is activated when TGFβ ligands induce formation of TGFβRI and TGFβRII receptor complexes. However, loss of TGFβRI in mouse cartilage led to more severe defects than did loss of TGFβRII. Most of the defects were rescued by deletion of the BMP receptor ACVRL1, suggesting that a major role of TGFβRI in cartilage development is to suppress BMP signaling by ACVRL1. TGFβRI prevents the formation of ACVRL1/ACTRIIB complexes, which have high affinity for BMP9, the most abundant BMP in circulation. These results demonstrate a form of cross talk between BMP and TGFβ signaling pathways in cartilage that may also operate in other tissues where the relative output of these 2 pathways is required. The type I TGFβ receptor TGFβRI (encoded by Tgfbr1) was ablated in cartilage. The resulting Tgfbr1Col2 mice exhibited lethal chondrodysplasia. Similar defects were not seen in mice lacking the type II TGFβ receptor or SMADs 2 and 3, the intracellular mediators of canonical TGFβ signaling. However, we detected elevated BMP activity in Tgfbr1Col2 mice. As previous studies showed that TGFβRI can physically interact with ACVRL1, a type I BMP receptor, we generated cartilage-specific Acvrl1 (Acvrl1Col2) and Acvrl1/Tgfbr1 (Acvrl1/Tgfbr1Col2) knockouts. Loss of ACVRL1 alone had no effect, but Acvrl1/Tgfbr1Col2 mice exhibited a striking reversal of the chondrodysplasia seen in Tgfbr1Col2 mice. Loss of TGFβRI led to a redistribution of the type II receptor ACTRIIB into ACVRL1/ACTRIIB complexes, which have high affinity for BMP9. Although BMP9 is not produced in cartilage, we detected BMP9 in the growth plate, most likely derived from the circulation. These findings demonstrate that the major function of TGFβRI in cartilage is not to transduce TGFβ signaling, but rather to antagonize BMP signaling mediated by ACVRL1.
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SMAD6 is frequently mutated
in nonsyndromic radioulnar synostosis. Genet Med 2019; 21:2577-2585. [DOI: 10.1038/s41436-019-0552-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 05/14/2019] [Indexed: 01/10/2023] Open
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Kloth K, Bierhals T, Johannsen J, Harms FL, Juusola J, Johnson MC, Grange DK, Kutsche K. Biallelic variants in SMAD6 are associated with a complex cardiovascular phenotype. Hum Genet 2019; 138:625-634. [DOI: 10.1007/s00439-019-02011-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 04/03/2019] [Indexed: 01/10/2023]
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Confirmation of the role of pathogenic SMAD6 variants in bicuspid aortic valve-related aortopathy. Eur J Hum Genet 2019; 27:1044-1053. [PMID: 30796334 DOI: 10.1038/s41431-019-0363-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/22/2019] [Accepted: 01/24/2019] [Indexed: 11/08/2022] Open
Abstract
Progressive dilatation of the thoracic aorta leads to thoracic aortic aneurysm (TAA), which is often asymptomatic but predisposes to lethal aortic dissections and ruptures. TAA is a common complication in patients with bicuspid aortic valve (BAV). Recently, rare loss-of-function SMAD6 variants were shown to contribute significantly to the genetic aetiology of BAV/TAA. Intriguingly, patients with craniosynostosis have also been reported to be explained molecularly by similar loss-of-function SMAD6 variants. While significantly reduced penetrance of craniosynostosis has been reported for the SMAD6 variants as such, near-complete penetrance is reached upon co-occurrence with a common BMP2 SNP risk allele. Here, we report on the results of a SMAD6-variant analysis in 473 unrelated non-syndromic TAA patients, of which the SMAD6-positive individuals were also studied for the presence of the BMP2 risk allele. Although only 14% of the TAA patients also presented BAV, all novel likely pathogenic SMAD6 variants (N = 7) were identified in BAV/TAA individuals, further establishing the role of SMAD6 variants to the aetiology of BAV/TAA and revealing limited contribution to TAA development in patients with a tricuspid aortic valve. Familial segregation studies confirmed reduced penetrance (82%) and variable clinical expressivity, with coarctation of the aorta being a common comorbidity. None of our six BMP2+/SMAD6+ patients presented with craniosynostosis. Hence, the proposed digenic model for craniosynostosis was not supported in the presented BAV/TAA cohort, suggesting that additional factors are at play. Finally, our data provide improved insights into the clinical spectrum of SMAD6-related BAV/TAA and has important implications for molecular diagnostics.
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Abstract
Bone morphogenetic proteins (BMPs) constitute the largest subdivision of the transforming growth factor-β family of ligands. BMPs exhibit widespread utility and pleiotropic, context-dependent effects, and the strength and duration of BMP pathway signaling is tightly regulated at numerous levels via mechanisms operating both inside and outside the cell. Defects in the BMP pathway or its regulation underlie multiple human diseases of different organ systems. Yet much remains to be discovered about the BMP pathway in its original context, i.e., the skeleton. In this review, we provide a comprehensive overview of the intricacies of the BMP pathway and its inhibitors in bone development, homeostasis, and disease. We frame the content of the review around major unanswered questions for which incomplete evidence is available. First, we consider the gene regulatory network downstream of BMP signaling in osteoblastogenesis. Next, we examine why some BMP ligands are more osteogenic than others and what factors limit BMP signaling during osteoblastogenesis. Then we consider whether specific BMP pathway components are required for normal skeletal development, and if the pathway exerts endogenous effects in the aging skeleton. Finally, we propose two major areas of need of future study by the field: greater resolution of the gene regulatory network downstream of BMP signaling in the skeleton, and an expanded repertoire of reagents to reliably and specifically inhibit individual BMP pathway components.
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Affiliation(s)
- Jonathan W Lowery
- Division of Biomedical Science, Marian University College of Osteopathic Medicine , Indianapolis, Indiana ; and Department of Developmental Biology, Harvard School of Dental Medicine , Boston, Massachusetts
| | - Vicki Rosen
- Division of Biomedical Science, Marian University College of Osteopathic Medicine , Indianapolis, Indiana ; and Department of Developmental Biology, Harvard School of Dental Medicine , Boston, Massachusetts
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Wylie LA, Mouillesseaux KP, Chong DC, Bautch VL. Developmental SMAD6 loss leads to blood vessel hemorrhage and disrupted endothelial cell junctions. Dev Biol 2018; 442:199-209. [PMID: 30098998 DOI: 10.1016/j.ydbio.2018.07.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 07/13/2018] [Accepted: 07/31/2018] [Indexed: 01/10/2023]
Abstract
The BMP pathway regulates developmental processes including angiogenesis, yet its signaling outputs are complex and context-dependent. Recently, we showed that SMAD6, an intracellular BMP inhibitor expressed in endothelial cells, decreases vessel sprouting and branching both in vitro and in zebrafish. Genetic deletion of SMAD6 in mice results in poorly characterized cardiovascular defects and lethality. Here, we analyzed the effects of SMAD6 loss on vascular function during murine development. SMAD6 was expressed in a subset of blood vessels throughout development, primarily in arteries, while expression outside of the vasculature was largely confined to developing cardiac valves with no obvious embryonic phenotype. Mice deficient in SMAD6 died during late gestation and early stages of postnatal development, and this lethality was associated with vessel hemorrhage. Mice that survived past birth had increased branching and sprouting of developing postnatal retinal vessels and disorganized tight and adherens junctions. In vitro, knockdown of SMAD6 led to abnormal endothelial cell adherens junctions and increased VE-cadherin endocytosis, indicative of activated endothelium. Thus, SMAD6 is essential for proper blood vessel function during murine development, where it appears to stabilize endothelial junctions to prevent hemorrhage and aberrant angiogenesis.
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Affiliation(s)
- Lyndsay A Wylie
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | - Diana C Chong
- Dept. of Medicine, Duke University, Durham, NC 27710, USA
| | - Victoria L Bautch
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; McAllister Heart Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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Shah TA, Zhu Y, Shaikh NN, Harris MA, Harris SE, Rogers MB. Characterization of new bone morphogenetic protein (Bmp)-2 regulatory alleles. Genesis 2017; 55. [PMID: 28401685 DOI: 10.1002/dvg.23035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/16/2017] [Accepted: 04/06/2017] [Indexed: 12/28/2022]
Abstract
Bone morphogenetic protein 2 (BMP2, HGNC:1069, GeneID: 650) is a classical morphogen; a molecule that acts at a distance and whose concentration influences cell proliferation, differentiation, and apoptosis. Key events requiring precise Bmp2 regulation include heart specification and morphogenesis and neural development. In mesenchymal cells, the concentration of BMP2 influences myogenesis, adipogenesis, chondrogenesis, and osteogenesis. Because the amount, timing, and location of BMP2 synthesis influence pattern formation and organogenesis, the mechanisms that regulate Bmp2 are crucial. A sequence within the 3'UTR of the Bmp2 mRNA termed the "ultra-conserved sequence" (UCS) has been largely unchanged since fishes and mammals diverged. Cre-lox mediated deletion of the UCS in a reporter transgene revealed that the UCS may repress Bmp2 in proepicardium, epicardium, and epicardium-derived cells (EPDC) and in tissues with known epicardial contributions (coronary vessels and valves). The UCS also repressed the transgene in the aorta, outlet septum, posterior cardiac plexus, cardiac and extra-cardiac nerves, and neural ganglia. We used homologous recombination and conditional deletion to generate three new alleles in which the Bmp2 3'UTR was altered as follows: a UCS flanked by loxP sites with or without a neomycin resistance targeting vector, or a deleted UCS. Deletion of the UCS was associated with elevated Bmp2 mRNA and BMP signaling levels, reduced fitness, and embryonic malformations.
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Affiliation(s)
- Tapan A Shah
- Department of Microbiology, Biochemistry, and Molecular Genetics, Rutgers NJMS, Newark, New Jersey
| | - Youhua Zhu
- Department of Microbiology, Biochemistry, and Molecular Genetics, Rutgers NJMS, Newark, New Jersey
| | - Nadia N Shaikh
- Department of Microbiology, Biochemistry, and Molecular Genetics, Rutgers NJMS, Newark, New Jersey
| | - Marie A Harris
- Department of Periodontics, University of Texas Health Science Centre, San Antonio, Texas
| | - Stephen E Harris
- Department of Periodontics, University of Texas Health Science Centre, San Antonio, Texas
| | - Melissa B Rogers
- Department of Microbiology, Biochemistry, and Molecular Genetics, Rutgers NJMS, Newark, New Jersey
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Shahi M, Peymani A, Sahmani M. Regulation of Bone Metabolism. Rep Biochem Mol Biol 2017; 5:73-82. [PMID: 28367467 PMCID: PMC5346273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 08/14/2016] [Indexed: 06/07/2023]
Abstract
Bone is formed through the processes of endochondral and intramembranous ossification. In endochondral ossification primary mesenchymal cells differentiate to chondrocytes and then are progressively substituted by bone, while in intramembranous ossification mesenchymal stem cells (MSCs) differentiate directly into osteoblasts to form bone. The steps of osteogenic proliferation, differentiation, and bone homeostasis are controlled by various markers and signaling pathways. Bone needs to be remodeled to maintain integrity with osteoblasts, which are bone-forming cells, and osteoclasts, which are bone-degrading cells.In this review we considered the major factors and signaling pathways in bone formation; these include fibroblast growth factors (FGFs), bone morphogenetic proteins (BMPs), wingless-type (Wnt) genes, runt-related transcription factor 2 (RUNX2) and osteoblast-specific transcription factor (osterix or OSX).
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Affiliation(s)
- Maryam Shahi
- Cellular and Molecular Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
| | - Amir Peymani
- Cellular and Molecular Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
| | - Mehdi Sahmani
- Department of Clinical Biochemistry and Medical Genetics, Cellular and Molecular Research Center, Qazvin University of
Medical Sciences, Qazvin, Iran.
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Abstract
Inhibitory Smads (I-Smads) have conserved carboxy-terminal MH2 domains but highly divergent amino-terminal regions when compared with receptor-regulated Smads (R-Smads) and common-partner Smads (co-Smads). Smad6 preferentially inhibits Smad signaling initiated by the bone morphogenetic protein (BMP) type I receptors ALK-3 and ALK-6, whereas Smad7 inhibits both transforming growth factor β (TGF-β)- and BMP-induced Smad signaling. I-Smads also regulate some non-Smad signaling pathways. Here, we discuss the vertebrate I-Smads, their roles as inhibitors of Smad activation and regulators of receptor stability, as scaffolds for non-Smad signaling, and their possible roles in the nucleus. We also discuss the posttranslational modification of I-Smads, including phosphorylation, ubiquitylation, acetylation, and methylation.
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Affiliation(s)
- Keiji Miyazawa
- Department of Biochemistry, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Chuo, Yamanashi 409-3898, Japan
| | - Kohei Miyazono
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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36
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Abstract
Inhibitory Smads (I-Smads) have conserved carboxy-terminal MH2 domains but highly divergent amino-terminal regions when compared with receptor-regulated Smads (R-Smads) and common-partner Smads (co-Smads). Smad6 preferentially inhibits Smad signaling initiated by the bone morphogenetic protein (BMP) type I receptors ALK-3 and ALK-6, whereas Smad7 inhibits both transforming growth factor β (TGF-β)- and BMP-induced Smad signaling. I-Smads also regulate some non-Smad signaling pathways. Here, we discuss the vertebrate I-Smads, their roles as inhibitors of Smad activation and regulators of receptor stability, as scaffolds for non-Smad signaling, and their possible roles in the nucleus. We also discuss the posttranslational modification of I-Smads, including phosphorylation, ubiquitylation, acetylation, and methylation.
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Affiliation(s)
- Keiji Miyazawa
- Department of Biochemistry, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Chuo, Yamanashi 409-3898, Japan
| | - Kohei Miyazono
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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Timberlake AT, Choi J, Zaidi S, Lu Q, Nelson-Williams C, Brooks ED, Bilguvar K, Tikhonova I, Mane S, Yang JF, Sawh-Martinez R, Persing S, Zellner EG, Loring E, Chuang C, Galm A, Hashim PW, Steinbacher DM, DiLuna ML, Duncan CC, Pelphrey KA, Zhao H, Persing JA, Lifton RP. Two locus inheritance of non-syndromic midline craniosynostosis via rare SMAD6 and common BMP2 alleles. eLife 2016; 5. [PMID: 27606499 PMCID: PMC5045293 DOI: 10.7554/elife.20125] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 08/30/2016] [Indexed: 12/11/2022] Open
Abstract
Premature fusion of the cranial sutures (craniosynostosis), affecting 1 in 2000 newborns, is treated surgically in infancy to prevent adverse neurologic outcomes. To identify mutations contributing to common non-syndromic midline (sagittal and metopic) craniosynostosis, we performed exome sequencing of 132 parent-offspring trios and 59 additional probands. Thirteen probands (7%) had damaging de novo or rare transmitted mutations in SMAD6, an inhibitor of BMP – induced osteoblast differentiation (p<10−20). SMAD6 mutations nonetheless showed striking incomplete penetrance (<60%). Genotypes of a common variant near BMP2 that is strongly associated with midline craniosynostosis explained nearly all the phenotypic variation in these kindreds, with highly significant evidence of genetic interaction between these loci via both association and analysis of linkage. This epistatic interaction of rare and common variants defines the most frequent cause of midline craniosynostosis and has implications for the genetic basis of other diseases. DOI:http://dx.doi.org/10.7554/eLife.20125.001 The bones in the front, back and sides of the human skull are not fused to one another at birth in order to allow the brain to double in size during the first year of life and continue growing into adulthood. However, one in 2,000 infants is born with a condition called craniosynostosis in which some of these bones have already fused. This fusion prevents the skull from growing properly, and can lead to the brain becoming compressed. As such, surgeons routinely undo the fusion in these infants to allow the brain and skull to grow normally. Eighty-five percent of craniosynostosis cases occur in infants with no other abnormalities, (called non-syndromic cases) and most have no other affected family member. It has therefore been unclear whether these infants have craniosynostosis due to a genetic or non-genetic cause. If the cause is genetic, it is also not clear whether a mutation in a single gene, the combined effects of many genes, or something in between is responsible. Now, by focusing on a group of 191 infants with premature fusion of bones joined at the midline of the skull, Timberlake et al. asked if any of the approximately 20,000 genes in the human genome were altered more frequently in these infants than would be expected by chance. This search revealed that rare mutations that disable one copy of a gene called SMAD6 in combination with a common DNA variant near another gene called BMP2 account for about 7% of infants with midline forms of craniosynostosis. These genes are both known to regulate how bones form, which explains how the mutation of these genes could lead to craniosynostosis. In all cases, the parents of these children were unaffected. This was typically because one parent had only the SMAD6 mutation while the other had only the common BMP2 variant; the transmission of both to their offspring resulted in craniosynostosis. The finding that a rare mutation’s effect is strongly modified by a common variant from another site in the genome is unprecedented. These findings will allow doctors to counsel families about the risk of having additional children with craniosynostosis. Timberlake et al. next plan to study more patients with craniosynostosis to identify additional genes that contribute to this disease. They will also look at other diseases to see whether the combination of rare mutation and common DNA variant could be behind other unexplained disorders. DOI:http://dx.doi.org/10.7554/eLife.20125.002
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Affiliation(s)
- Andrew T Timberlake
- Department of Genetics, Yale University School of Medicine, New Haven, United States.,Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States.,Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Jungmin Choi
- Department of Genetics, Yale University School of Medicine, New Haven, United States.,Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - Samir Zaidi
- Department of Genetics, Yale University School of Medicine, New Haven, United States.,Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - Qiongshi Lu
- Department of Biostatistics, Yale University School of Medicine, New Haven, United States
| | - Carol Nelson-Williams
- Department of Genetics, Yale University School of Medicine, New Haven, United States.,Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States
| | - Eric D Brooks
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Kaya Bilguvar
- Department of Genetics, Yale University School of Medicine, New Haven, United States.,Yale Center for Genome Analysis, New Haven, United States
| | | | - Shrikant Mane
- Department of Genetics, Yale University School of Medicine, New Haven, United States.,Yale Center for Genome Analysis, New Haven, United States
| | - Jenny F Yang
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Rajendra Sawh-Martinez
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Sarah Persing
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Elizabeth G Zellner
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Erin Loring
- Department of Genetics, Yale University School of Medicine, New Haven, United States.,Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States.,Yale Center for Genome Analysis, New Haven, United States
| | - Carolyn Chuang
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Amy Galm
- Craniosynostosis and Positional Plagiocephaly Support, New York, United States
| | - Peter W Hashim
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Derek M Steinbacher
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Michael L DiLuna
- Department of Neurosurgery, Yale University School of Medicine, New Haven, United States
| | - Charles C Duncan
- Department of Neurosurgery, Yale University School of Medicine, New Haven, United States
| | - Kevin A Pelphrey
- Child Study Center, Yale University School of Medicine, New Haven, United States
| | - Hongyu Zhao
- Department of Biostatistics, Yale University School of Medicine, New Haven, United States
| | - John A Persing
- Section of Plastic and Reconstructive Surgery, Department of Surgery, Yale University School of Medicine, New Haven, United States
| | - Richard P Lifton
- Department of Genetics, Yale University School of Medicine, New Haven, United States.,Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, United States.,Yale Center for Genome Analysis, New Haven, United States.,The Rockefeller University, New York, United States
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Samsa WE, Zhou X, Zhou G. Signaling pathways regulating cartilage growth plate formation and activity. Semin Cell Dev Biol 2016; 62:3-15. [PMID: 27418125 DOI: 10.1016/j.semcdb.2016.07.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 07/08/2016] [Indexed: 12/17/2022]
Abstract
The growth plate is a highly specialized and dynamic cartilage structure that serves many essential functions in skeleton patterning, growth and endochondral ossification in developing vertebrates. Major signaling pathways initiated by classical morphogens and by other systemic and tissue-specific factors are intimately involved in key aspects of growth plate development. As a corollary of these essential functions, disturbances in these pathways due to mutations or environmental factors lead to severe skeleton disorders. Here, we review these pathways and the most recent progress made in understanding their roles in chondrocyte differentiation in growth plate development and activity. Furthermore, we discuss newly uncovered pathways involved in growth plate formation, including mTOR, the circadian clock, and the COP9 signalosome.
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Affiliation(s)
- William E Samsa
- Department of Orthopaedics, Case Western Reserve University, Cleveland, OH, USA
| | - Xin Zhou
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Guang Zhou
- Department of Orthopaedics, Case Western Reserve University, Cleveland, OH, USA; Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA.
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39
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Lafont JE, Poujade FA, Pasdeloup M, Neyret P, Mallein-Gerin F. Hypoxia potentiates the BMP-2 driven COL2A1 stimulation in human articular chondrocytes via p38 MAPK. Osteoarthritis Cartilage 2016; 24:856-67. [PMID: 26708156 DOI: 10.1016/j.joca.2015.11.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 10/02/2015] [Accepted: 11/24/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Since the biological effect of cartilage mediators is generally studied in a non-physiologic environment of 21% O2, we investigated the effects of a chronic hypoxia on the capability of articular chondrocytes to respond to one anabolic stimulation. DESIGN Human Articular Chondrocytes (HACs) were cultured under hypoxia and stimulated with the chondrogenic growth factor BMP-2. The phenotype of the chondrocytes was studied by RT-PCR, and the cartilage-specific type II collagen production and deposition were also examined by western immunoblot and immunofluorescence. The Bone Morphogenetic protein (BMP) signalling pathway was also analysed. RESULTS BMP-2 is much more efficient to stimulate the expression of the cartilage-specific gene COL2A1 by HACs when cultured under hypoxia (1%O2) compared to normoxia (21%O2). Analysis of the BMP-activated signalling shows that the Smad pathway is inhibited under hypoxia, whereas p38 MAPK is activated, and is involved in a synergy between hypoxia and BMP signalling, thus contributing to the enhanced anabolic response. CONCLUSIONS Our study shows that hypoxia interplays with a chondrogenic factor and enhances the overall anabolic activity of the HACs. Alternatively to Hypoxia-Inducible Factor (HIF) signalling, and through a cross-talk with the BMP signalling which involves the p38 pathway, hypoxic stimulation markedly increases the capability of chondrocytes to produce the cartilage-specific type II collagen. Therefore our study provides new evidences of the multilayered effects of hypoxia in the anabolic functions of chondrocytes. This understanding may help promoting the anabolic function of articular chondrocytes, and thus improving their manipulation for cell therapy.
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Affiliation(s)
- J E Lafont
- Institute for Biology and Chemistry of Proteins, CNRS, UMR 5305 Laboratory of Tissue Biology and Therapeutic Engineering, Université Claude Bernard-Lyon 1 and University of Lyon, France.
| | - F-A Poujade
- Institute for Biology and Chemistry of Proteins, CNRS, UMR 5305 Laboratory of Tissue Biology and Therapeutic Engineering, Université Claude Bernard-Lyon 1 and University of Lyon, France
| | - M Pasdeloup
- Institute for Biology and Chemistry of Proteins, CNRS, UMR 5305 Laboratory of Tissue Biology and Therapeutic Engineering, Université Claude Bernard-Lyon 1 and University of Lyon, France
| | - P Neyret
- Orthopaedic Surgery Department, Hôpital de la Croix-Rousse, 103 grande rue de la Croix-Rousse, 69317 Lyon Cedex 04, France
| | - F Mallein-Gerin
- Institute for Biology and Chemistry of Proteins, CNRS, UMR 5305 Laboratory of Tissue Biology and Therapeutic Engineering, Université Claude Bernard-Lyon 1 and University of Lyon, France
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40
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Rahman MS, Akhtar N, Jamil HM, Banik RS, Asaduzzaman SM. TGF-β/BMP signaling and other molecular events: regulation of osteoblastogenesis and bone formation. Bone Res 2015; 3:15005. [PMID: 26273537 PMCID: PMC4472151 DOI: 10.1038/boneres.2015.5] [Citation(s) in RCA: 377] [Impact Index Per Article: 41.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 01/26/2015] [Accepted: 02/27/2015] [Indexed: 02/08/2023] Open
Abstract
Transforming growth factor-beta (TGF-β)/bone morphogenetic protein (BMP) plays a fundamental role in the regulation of bone organogenesis through the activation of receptor serine/threonine kinases. Perturbations of TGF-β/BMP activity are almost invariably linked to a wide variety of clinical outcomes, i.e., skeletal, extra skeletal anomalies, autoimmune, cancer, and cardiovascular diseases. Phosphorylation of TGF-β (I/II) or BMP receptors activates intracellular downstream Smads, the transducer of TGF-β/BMP signals. This signaling is modulated by various factors and pathways, including transcription factor Runx2. The signaling network in skeletal development and bone formation is overwhelmingly complex and highly time and space specific. Additive, positive, negative, or synergistic effects are observed when TGF-β/BMP interacts with the pathways of MAPK, Wnt, Hedgehog (Hh), Notch, Akt/mTOR, and miRNA to regulate the effects of BMP-induced signaling in bone dynamics. Accumulating evidence indicates that Runx2 is the key integrator, whereas Hh is a possible modulator, miRNAs are regulators, and β-catenin is a mediator/regulator within the extensive intracellular network. This review focuses on the activation of BMP signaling and interaction with other regulatory components and pathways highlighting the molecular mechanisms regarding TGF-β/BMP function and regulation that could allow understanding the complexity of bone tissue dynamics.
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Affiliation(s)
- Md Shaifur Rahman
- Tissue Banking and Biomaterial Research Unit, Atomic Energy Research Establishment , Dhaka 1349, Bangladesh
| | - Naznin Akhtar
- Tissue Banking and Biomaterial Research Unit, Atomic Energy Research Establishment , Dhaka 1349, Bangladesh
| | - Hossen Mohammad Jamil
- Tissue Banking and Biomaterial Research Unit, Atomic Energy Research Establishment , Dhaka 1349, Bangladesh
| | - Rajat Suvra Banik
- Lab of Network Biology, Biotechnology and Genetic Engineering Discipline, Khulna University , Khulna 9208, Bangladesh
| | - Sikder M Asaduzzaman
- Tissue Banking and Biomaterial Research Unit, Atomic Energy Research Establishment , Dhaka 1349, Bangladesh
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41
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Rigueur D, Brugger S, Anbarchian T, Kim JK, Lee Y, Lyons KM. The type I BMP receptor ACVR1/ALK2 is required for chondrogenesis during development. J Bone Miner Res 2015; 30:733-41. [PMID: 25413979 PMCID: PMC4376569 DOI: 10.1002/jbmr.2385] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 09/07/2014] [Accepted: 10/07/2014] [Indexed: 11/12/2022]
Abstract
Bone morphogenetic proteins (BMPs) are crucial regulators of chondrogenesis. BMPs transduce their signals through three type I receptors: BMPR1A, BMPR1B, and ACVR1/ALK2. Fibrodysplasia ossificans progressiva (FOP), a rare disorder characterized by progressive ossification of connective tissue, is caused by an activating mutation in Acvr1 (the gene that encodes ACVR1/ALK2). However, there are few developmental defects associated with FOP. Thus, the role of ACVR1 in chondrogenesis during development is unknown. Here we report the phenotype of mice lacking ACVR1 in cartilage. Acvr1(CKO) mice are viable but exhibit defects in the development of cranial and axial structures. Mutants exhibit a shortened cranial base, and cervical vertebrae are hypoplastic. Acvr1(CKO) adult mice develop progressive kyphosis. These morphological defects were associated with decreased levels of Smad1/5 and p38 activation, and with reduced rates of chondrocyte proliferation in vertebral cartilage. We also tested whether ACVR1 exerts coordinated functions with BMPR1A and BMPR1B through analysis of double mutants. Acvr1/Bmpr1a and Acvr1/Bmpr1b mutant mice exhibited generalized perinatal lethal chondrodysplasia that was much more severe than in any of the corresponding mutant strains. These findings demonstrate that ACVR1 is required for chondrocyte proliferation and differentiation, particularly in craniofacial and axial elements, but exerts coordinated functions with both BMPR1A and BMPR1B throughout the developing endochondral skeleton.
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Affiliation(s)
- Diana Rigueur
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, USA
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42
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Abstract
Due to a blood supply shortage, articular cartilage has a limited capacity for self-healing once damaged. Articular chondrocytes, cartilage progenitor cells, embryonic stem cells, and mesenchymal stem cells are candidate cells for cartilage regeneration. Significant current attention is paid to improving chondrogenic differentiation capacity; unfortunately, the potential chondrogenic hypertrophy of differentiated cells is largely overlooked. Consequently, the engineered tissue is actually a transient cartilage rather than a permanent one. The development of hypertrophic cartilage ends with the onset of endochondral bone formation which has inferior mechanical properties. In this review, current strategies for inhibition of chondrogenic hypertrophy are comprehensively summarized; the impact of cell source options is discussed; and potential mechanisms underlying these strategies are also categorized. This paper aims to provide guidelines for the prevention of hypertrophy in the regeneration of cartilage tissue. This knowledge may also facilitate the retardation of osteophytes in the treatment of osteoarthritis.
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Affiliation(s)
- Song Chen
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics, West Virginia University, Morgantown, WV 26506, USA
- Department of Joint Surgery, Shanghai Changzheng Hospital, The Second Military Medical University, Shanghai 200003, China
| | - Peiliang Fu
- Department of Joint Surgery, Shanghai Changzheng Hospital, The Second Military Medical University, Shanghai 200003, China
| | - Ruijun Cong
- Department of Orthopaedics, The 10th People's Hospital of Shanghai, Affiliated with Tongji University, Shanghai 200072, China
| | - HaiShan Wu
- Department of Joint Surgery, Shanghai Changzheng Hospital, The Second Military Medical University, Shanghai 200003, China
| | - Ming Pei
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics, West Virginia University, Morgantown, WV 26506, USA
- Exercise Physiology, West Virginia University, Morgantown, WV 26506, USA
- Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV 26506, USA
- Corresponding author. Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics, West Virginia University, PO Box 9196, One Medical Center Drive, Morgantown, WV 26506-9196, USA. Tel.: +1 304 293 1072; fax: +1 304 293 7070.
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43
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Hayata T, Ezura Y, Asashima M, Nishinakamura R, Noda M, Noda M. Dullard/Ctdnep1 regulates endochondral ossification via suppression of TGF-β signaling. J Bone Miner Res 2015; 30:318-29. [PMID: 25155999 DOI: 10.1002/jbmr.2343] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 08/10/2014] [Accepted: 08/17/2014] [Indexed: 01/04/2023]
Abstract
Transforming growth factor (TGF)-β signaling plays critical roles during skeletal development and its excessive signaling causes genetic diseases of connective tissues including Marfan syndrome and acromelic dysplasia. However, the mechanisms underlying prevention of excessive TGF-β signaling in skeletogenesis remain unclear. We previously reported that Dullard/Ctdnep1 encoding a small phosphatase is required for nephron maintenance after birth through suppression of bone morphogenetic protein (BMP) signaling. Unexpectedly, we found that Dullard is involved in suppression of TGF-β signaling during endochondral ossification. Conditional Dullard-deficient mice in the limb and sternum mesenchyme by Prx1-Cre displayed the impaired growth and ossification of skeletal elements leading to postnatal lethality. Dullard was expressed in early cartilage condensations and later in growth plate chondrocytes. The tibia growth plate of newborn Dullard mutant mice showed reduction of the proliferative and hypertrophic chondrocyte layers. The sternum showed deformity of cartilage primordia and delayed hypertrophy. Micromass culture experiments revealed that Dullard deficiency enhanced early cartilage condensation and differentiation, but suppressed mineralized hypertrophic chondrocyte differentiation, which was reversed by treatment with TGF-β type I receptor kinase blocker LY-364947. Dullard deficiency induced upregulation of protein levels of both phospho-Smad2/3 and total Smad2/3 in micromass cultures without increase of Smad2/3 mRNA levels, suggesting that Dullard may affect Smad2/3 protein stability. The phospho-Smad2/3 level was also upregulated in perichondrium and hypertrophic chondrocytes in Dullard-deficient embryos. Response to TGF-β signaling was enhanced in Dullard-deficient primary chondrocyte cultures at late, but not early, time point. Moreover, perinatal administration of LY-364947 ameliorated the sternum deformity in vivo. Thus, we identified Dullard as a new negative regulator of TGF-β signaling in endochondral ossification.
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Affiliation(s)
- Tadayoshi Hayata
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
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44
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Ascenzi MG, Du X, Harding JI, Beylerian EN, de Silva BM, Gross BJ, Kastein HK, Wang W, Lyons KM, Schaeffer H. Automated Cell Detection and Morphometry on Growth Plate Images of Mouse Bone. APPLIED MATHEMATICS 2014; 5:2866-2880. [PMID: 25525552 DOI: 10.4236/am.2014.518273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Microscopy imaging of mouse growth plates is extensively used in biology to understand the effect of specific molecules on various stages of normal bone development and on bone disease. Until now, such image analysis has been conducted by manual detection. In fact, when existing automated detection techniques were applied, morphological variations across the growth plate and heterogeneity of image background color, including the faint presence of cells (chondrocytes) located deeper in tissue away from the image's plane of focus, and lack of cell-specific features, interfered with identification of cell. We propose the first method of automated detection and morphometry applicable to images of cells in the growth plate of long bone. Through ad hoc sequential application of the Retinex method, anisotropic diffusion and thresholding, our new cell detection algorithm (CDA) addresses these challenges on bright-field microscopy images of mouse growth plates. Five parameters, chosen by the user in respect of image characteristics, regulate our CDA. Our results demonstrate effectiveness of the proposed numerical method relative to manual methods. Our CDA confirms previously established results regarding chondrocytes' number, area, orientation, height and shape of normal growth plates. Our CDA also confirms differences previously found between the genetic mutated mouse Smad1/5CKO and its control mouse on fluorescence images. The CDA aims to aid biomedical research by increasing efficiency and consistency of data collection regarding arrangement and characteristics of chondrocytes. Our results suggest that automated extraction of data from microscopy imaging of growth plates can assist in unlocking information on normal and pathological development, key to the underlying biological mechanisms of bone growth.
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Affiliation(s)
- Maria-Grazia Ascenzi
- Department of Orthopaedic Surgery, University of California, Los Angeles, California 90095, USA
| | - Xia Du
- Department of Orthopaedic Surgery, University of California, Los Angeles, California 90095, USA
| | - James I Harding
- Department of Orthopaedic Surgery, University of California, Los Angeles, California 90095, USA
| | - Emily N Beylerian
- Department of Mathematics, University of California, Los Angeles, California 90095, USA
| | - Brian M de Silva
- Department of Mathematics, University of California, Los Angeles, California 90095, USA
| | - Ben J Gross
- Department of Mathematics, University of California, Los Angeles, California 90095, USA
| | - Hannah K Kastein
- Department of Mathematics, University of California, Los Angeles, California 90095, USA
| | - Weiguang Wang
- Department of Orthopaedic Surgery, University of California, Los Angeles, California 90095, USA
| | - Karen M Lyons
- Department of Orthopaedic Surgery, University of California, Los Angeles, California 90095, USA
| | - Hayden Schaeffer
- Department of Mathematics, University of California, Irvine, California 92697, USA
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45
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Khattab HM, Ono M, Sonoyama W, Oida Y, Shinkawa S, Yoshioka Y, Maekawa K, Tabata Y, Sugama K, Sebald W, Kuboki T. The BMP2 antagonist inhibitor L51P enhances the osteogenic potential of BMP2 by simultaneous and delayed synergism. Bone 2014; 69:165-73. [PMID: 25240457 DOI: 10.1016/j.bone.2014.09.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 08/03/2014] [Accepted: 09/08/2014] [Indexed: 02/05/2023]
Abstract
Bone morphogenetic protein 2 (BMP2) is a potent osteoinductive cytokine that plays crucial roles in bone repair. However, large amounts of BMP2 are required to induce sufficient bone formation in humans possibly due to a feedback response of BMP antagonists. The engineered BMP2 variant L51P is deficient in BMP receptor type I activation but maintains affinity for BMP antagonists and can allow for the inactivation of BMP antagonists, and eventually enhance BMP2 action. As hypothesized, simultaneous addition of L51P enhanced the BMP2-induced osteogenesis. To test the ability of L51P to competitively inactivate BMP antagonists, cell binding affinity of BMP2 ligands was investigated in the presence or absence of L51P. Because the BMP antagonists were highly expressed 3 days after exogenous BMP2 stimulation, we collected supernatants from 3-day stimulated cell cultures and used as condition culture media (CM). The results showed a significant decrease in the cell binding of BMP2 ligands when cells were incubated with exogenous BMP2 and CM, whereas L51P addition competitively rescued the suppression of BMP2-to-cell binding induced by CM incubation. In a delayed experimental model, L51P was applied 3 days after exogenous BMP2 stimulation and we could observe a striking enhancement of the BMP2-induced SMAD-1/5/8 phosphorylation and luciferase activity of the Id1 promoter compared to the simultaneous addition of the two factors. These findings provide a deeper insight into the cellular and molecular mechanisms involved in the effect of L51P in suppressing the BMP antagonists and enhancing BMP activity. Additionally, these results demonstrate that L51P is a promising down regulator of BMP-induced negative feedback, which could have a significant impact in future applications of BMP2 in research and clinical settings.
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Affiliation(s)
- Hany Mohamed Khattab
- Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Mitsuaki Ono
- Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
| | - Wataru Sonoyama
- Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yasutaka Oida
- Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Shigehiko Shinkawa
- Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yuya Yoshioka
- Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kenji Maekawa
- Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yasuhiko Tabata
- Department of Biomaterials, Field of Tissue Engineering, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | | | - Walter Sebald
- Physiological Chemistry II, Theodor-Boveri-Institute for Biocenter of Würzburg University, Würzburg, Germany
| | - Takuo Kuboki
- Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Wang RN, Green J, Wang Z, Deng Y, Qiao M, Peabody M, Zhang Q, Ye J, Yan Z, Denduluri S, Idowu O, Li M, Shen C, Hu A, Haydon RC, Kang R, Mok J, Lee MJ, Luu HL, Shi LL. Bone Morphogenetic Protein (BMP) signaling in development and human diseases. Genes Dis 2014; 1:87-105. [PMID: 25401122 PMCID: PMC4232216 DOI: 10.1016/j.gendis.2014.07.005] [Citation(s) in RCA: 658] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 07/15/2014] [Indexed: 02/06/2023] Open
Abstract
Bone Morphogenetic Proteins (BMPs) are a group of signaling molecules that belongs to the Transforming Growth Factor-β (TGF-β) superfamily of proteins. Initially discovered for their ability to induce bone formation, BMPs are now known to play crucial roles in all organ systems. BMPs are important in embryogenesis and development, and also in maintenance of adult tissue homeostasis. Mouse knockout models of various components of the BMP signaling pathway result in embryonic lethality or marked defects, highlighting the essential functions of BMPs. In this review, we first outline the basic aspects of BMP signaling and then focus on genetically manipulated mouse knockout models that have helped elucidate the role of BMPs in development. A significant portion of this review is devoted to the prominent human pathologies associated with dysregulated BMP signaling.
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Affiliation(s)
- Richard N. Wang
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Jordan Green
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Zhongliang Wang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Departments of Orthopaedic Surgery, Medicine, and Gynecology, the Affiliated Hospitals of Chongqing Medical University, Chongqing 400016, China
| | - Youlin Deng
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Departments of Orthopaedic Surgery, Medicine, and Gynecology, the Affiliated Hospitals of Chongqing Medical University, Chongqing 400016, China
| | - Min Qiao
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Departments of Orthopaedic Surgery, Medicine, and Gynecology, the Affiliated Hospitals of Chongqing Medical University, Chongqing 400016, China
| | - Michael Peabody
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Qian Zhang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Departments of Orthopaedic Surgery, Medicine, and Gynecology, the Affiliated Hospitals of Chongqing Medical University, Chongqing 400016, China
| | - Jixing Ye
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- School of Bioengineering, Chongqing University, Chongqing, China
| | - Zhengjian Yan
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Departments of Orthopaedic Surgery, Medicine, and Gynecology, the Affiliated Hospitals of Chongqing Medical University, Chongqing 400016, China
| | - Sahitya Denduluri
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Olumuyiwa Idowu
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Melissa Li
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Christine Shen
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Alan Hu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Rex C. Haydon
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Richard Kang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - James Mok
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Michael J. Lee
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Hue L. Luu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Lewis L. Shi
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
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Pignatti E, Zeller R, Zuniga A. To BMP or not to BMP during vertebrate limb bud development. Semin Cell Dev Biol 2014; 32:119-27. [PMID: 24718318 DOI: 10.1016/j.semcdb.2014.04.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 04/01/2014] [Indexed: 12/01/2022]
Abstract
The analysis of vertebrate limb bud development provides insight of general relevance into the signaling networks that underlie the controlled proliferative expansion of large populations of mesenchymal progenitors, cell fate determination and initiation of differentiation. In particular, extensive genetic analysis of mouse and experimental manipulation of chicken limb bud development has revealed the self-regulatory feedback signaling systems that interlink the main morphoregulatory signaling pathways including BMPs and their antagonists. It this review, we showcase the key role of BMPs and their antagonists during limb bud development. This review provides an understanding of the key morphoregulatory interactions that underlie the highly dynamic changes in BMP activity and signal transduction as limb bud development progresses from initiation and setting-up the signaling centers to determination and formation of the chondrogenic primordia for the limb skeletal elements.
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Affiliation(s)
- Emanuele Pignatti
- Developmental Genetics, Department Biomedicine, University of Basel, Mattenstrasse 28, CH-4058 Basel, Switzerland
| | - Rolf Zeller
- Developmental Genetics, Department Biomedicine, University of Basel, Mattenstrasse 28, CH-4058 Basel, Switzerland
| | - Aimée Zuniga
- Developmental Genetics, Department Biomedicine, University of Basel, Mattenstrasse 28, CH-4058 Basel, Switzerland.
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48
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Lorda-Diez CI, Montero JA, Choe S, Garcia-Porrero JA, Hurle JM. Ligand- and stage-dependent divergent functions of BMP signaling in the differentiation of embryonic skeletogenic progenitors in vitro. J Bone Miner Res 2014; 29:735-48. [PMID: 24038612 DOI: 10.1002/jbmr.2077] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 07/16/2013] [Accepted: 08/02/2013] [Indexed: 12/21/2022]
Abstract
Bone morphogenetic proteins (BMPs) are key molecules in the differentiation of skeletal tissues. We have investigated whether differentiation of limb embryonic mesodermal progenitors into different connective tissue lineages depends on specific stimulation of distinct BMP ligands or on the differential response of target cells to a common BMP stimulus. We show that Bmp2,4,5,7 and Gdf5 exhibit differential expression domains during the formation of tendons, cartilages, and joint tissues in digit development, but their respective effects on digit progenitors cell cultures cannot sustain the divergent differentiation of these cells into tendons, joints, and cartilage. However, the influence of BMPs differs based on the culture length. Early cultures respond to any of the BMPs by inducing chondrogenic factors and inhibiting fibrogenic and osteogenic markers. Later, a second phase of the culture occurs when BMPs attenuate their prochondrogenic influence and promote the fibrogenic marker Scleraxis. At advanced culture stages, BMPs inhibit prochondrogenic and profibrogenic markers and promote osteogenic markers. The switch from the prochondrogenic to the profibrogenic response appears critically dependent on the basal expression of Noggin. Thus, the differential regulation of Scleraxis at these stages was abrogated by treatments with a BMP-analogous compound (AB204) that escapes NOGGIN antagonism. Gene regulation experiments in absence of protein synthesis during the first period of culture indicate that BMPs activate at the same time master chondrogenic and fibrogenic genes together with cofactors responsible for driving the signaling cascade toward chondrogenesis or fibrogenesis. Gene-silencing experiments indicate that Id2 is one of the factors limiting the profibrogenic influence of BMPs. We propose that connective tissues are dynamic structures composed of cartilage, fibrous tissue, and bone that form in successive steps from the differentiation of common progenitors. This sequential differentiation is regulated by BMPs through a process that is dependent on the basal expression of BMP cofactors or signaling modulators.
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Affiliation(s)
- Carlos I Lorda-Diez
- Departamento de Anatomía y Biología Celular and IFIMAV, Universidad de Cantabria, Santander, Spain
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49
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Abstract
The first step in almost every investigation of skeletal phenotypes is analysis of whole-mount skeletal preparations. Whole-mount skeletal staining permits evaluation of the shapes and sizes of skeletal elements in their appropriate locations. The technique is thus the major method for detecting changes in skeletal patterning. Because cartilage and bone can be distinguished by differential staining, this technique is also a powerful means to assess the pace of skeletal maturation. This protocol covers staining of the pre- and postnatal mouse skeleton using Alcian blue and Alizarin red to identify cartilage and bone, respectively.
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50
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Estrada KD, Wang W, Retting KN, Chien CT, Elkhoury FF, Heuchel R, Lyons KM. Smad7 regulates terminal maturation of chondrocytes in the growth plate. Dev Biol 2013; 382:375-84. [PMID: 23994637 DOI: 10.1016/j.ydbio.2013.08.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 08/20/2013] [Accepted: 08/21/2013] [Indexed: 11/16/2022]
Abstract
Members of the bone morphogenetic protein (BMP) superfamily, including transforming growth factor-betas (TGFβ), regulate multiple aspects of chondrogenesis. Smad7 is an intracellular inhibitor of BMP and TGFβ signaling. Studies in which Smad7 was overexpressed in chondrocytes demonstrated that Smad7 can impact chondrogenesis by inhibiting BMP signaling. However, whether Smad7 is actually required for endochondral ossification in vivo is unclear. Moreover, whether Smad7 regulates TGFβ in addition to BMP signaling in developing cartilage is unknown. In this study, we found that Smad7 is required for both axial and appendicular skeletal development. Loss of Smad7 led to impairment of the cell cycle in chondrocytes and to defects in terminal maturation. This phenotype was attributed to upregulation of both BMP and TGFβ signaling in Smad7 mutant growth plates. Moreover, Smad7-/- mice develop hypocellular cores in the medial growth plates, associated with elevated HIF1α levels, cell death, and intracellular retention of types II and X collagen. Thus, Smad7 may be required to mediate cell stress responses in the growth plate during development.
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Affiliation(s)
- Kristine D Estrada
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA; Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California, Los Angeles, CA 90095, USA
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