1
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Kanai SM, Garcia CR, Augustus MR, Sharafeldeen SA, Brooks EP, Sucharov J, Lencer ES, Nichols JT, Clouthier DE. The Gq/11 family of Gα subunits is necessary and sufficient for lower jaw development. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.09.17.611698. [PMID: 39345358 PMCID: PMC11430119 DOI: 10.1101/2024.09.17.611698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
Vertebrate jaw development is coordinated by highly conserved ligand-receptor systems such as the peptide ligand Endothelin 1 (Edn1) and Endothelin receptor type A (Ednra), which are required for patterning of lower jaw structures. The Edn1/Ednra signaling pathway establishes the identity of lower jaw progenitor cells by regulating expression of numerous patterning genes, but the intracellular signaling mechanisms linking receptor activation to gene regulation remain poorly understood. As a first step towards elucidating this mechanism, we examined the function of the Gq/11 family of Gα subunits in zebrafish using pharmacological inhibition and genetic ablation of Gq/11 activity and transgenic induction of a constitutively active Gq protein in edn1 -/- embryos. Genetic loss of Gq/11 activity fully recapitulated the edn1 -/- phenotype, with genes encoding G11 being most essential. Furthermore, inducing Gq activity in edn1 -/- embryos not only restored Edn1/Ednra-dependent jaw structures and gene expression signatures but also caused homeosis of the upper jaw structure into a lower jaw-like structure. These results indicate that Gq/11 is necessary and sufficient to mediate the lower jaw patterning mechanism for Ednra in zebrafish.
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Affiliation(s)
- Stanley M. Kanai
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO USA
| | - Chloe R. Garcia
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO USA
| | - MaCalia R. Augustus
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO USA
| | - Shujan A. Sharafeldeen
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO USA
| | - Elliott P. Brooks
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO USA
| | - Juliana Sucharov
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO USA
| | - Ezra S. Lencer
- Department of Biology, Lafayette College, Easton, PA USA
| | - James T. Nichols
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO USA
| | - David E. Clouthier
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO USA
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2
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Liu X, Zhao Z, Shi X, Zong Y, Sun Y. The Effects of Viral Infections on the Molecular and Signaling Pathways Involved in the Development of the PAOs. Viruses 2024; 16:1342. [PMID: 39205316 PMCID: PMC11359136 DOI: 10.3390/v16081342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Revised: 08/06/2024] [Accepted: 08/20/2024] [Indexed: 09/04/2024] Open
Abstract
Cytomegalovirus infection contributes to 10-30% of congenital hearing loss in children. Vertebrate peripheral auditory organs include the outer, middle, and inner ear. Their development is regulated by multiple signaling pathways. However, most ear diseases due to viral infections are due to congenital infections and reactivation and affect healthy adults to a lesser extent. This may be due to the fact that viral infections affect signaling pathways that are important for the development of peripheral hearing organs. Therefore, an in-depth understanding of the relationship between viral infections and the signaling pathways involved in the development of peripheral hearing organs is important for the prevention and treatment of ear diseases. In this review, we summarize the effects of viruses on signaling pathways and signaling molecules in the development of peripheral auditory organs.
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Affiliation(s)
- Xiaozhou Liu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Zhengdong Zhao
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Xinyu Shi
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yanjun Zong
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yu Sun
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan 430022, China
- Institute of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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3
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Kanai SM, Clouthier DE. Endothelin signaling in development. Development 2023; 150:dev201786. [PMID: 38078652 PMCID: PMC10753589 DOI: 10.1242/dev.201786] [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] [Indexed: 12/18/2023]
Abstract
Since the discovery of endothelin 1 (EDN1) in 1988, the role of endothelin ligands and their receptors in the regulation of blood pressure in normal and disease states has been extensively studied. However, endothelin signaling also plays crucial roles in the development of neural crest cell-derived tissues. Mechanisms of endothelin action during neural crest cell maturation have been deciphered using a variety of in vivo and in vitro approaches, with these studies elucidating the basis of human syndromes involving developmental differences resulting from altered endothelin signaling. In this Review, we describe the endothelin pathway and its functions during the development of neural crest-derived tissues. We also summarize how dysregulated endothelin signaling causes developmental differences and how this knowledge may lead to potential treatments for individuals with gene variants in the endothelin pathway.
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Affiliation(s)
- Stanley M. Kanai
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - David E. Clouthier
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
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4
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Nair PG, Gayathri KS. Alagille Syndrome: A Case Report. Indian J Otolaryngol Head Neck Surg 2022; 74:5305-5310. [PMID: 36742831 PMCID: PMC9895155 DOI: 10.1007/s12070-020-02293-y] [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: 09/04/2020] [Accepted: 11/24/2020] [Indexed: 02/07/2023] Open
Abstract
Alagille Syndrome (ALGS) is a rare, autosomal dominant inherited disorder that causes abnormalities of liver, eye, heart, skeleton and distinctive facial appearance. ALGS is caused by mutation in one of two genes: JAG1 and NOTCH2. There are some reports of Hearing Loss in patients with ALGS raising the possibility of involvement of both structural components of middle ear and sensorineural components of the inner ear. The present case study was to emphasize audiological perspectives of Alagille Syndrome in a nine year old female child. Audiologists must be well aware of the typical features and clinical perspectives of ALGS and should be an expert in selecting appropriate tests and in interpreting findings.
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Affiliation(s)
- Prem. G. Nair
- Department of Speech Pathology and Audiology, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham, Kochi, India
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5
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Kohut TJ, Gilbert MA, Loomes KM. Alagille Syndrome: A Focused Review on Clinical Features, Genetics, and Treatment. Semin Liver Dis 2021; 41:525-537. [PMID: 34215014 DOI: 10.1055/s-0041-1730951] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Alagille syndrome (ALGS) is an autosomal dominant disorder caused by pathogenic variants in JAG1 or NOTCH2, which encode fundamental components of the Notch signaling pathway. Clinical features span multiple organ systems including hepatic, cardiac, vascular, renal, skeletal, craniofacial, and ocular, and occur with variable phenotypic penetrance. Genotype-phenotype correlation studies have not yet shown associations between mutation type and clinical manifestations or severity, and it has been hypothesized that modifier genes may modulate the effects of JAG1 and NOTCH2 pathogenic variants. Medical management is supportive, focusing on clinical manifestations of disease, with liver transplant indicated for severe pruritus, liver synthetic dysfunction, portal hypertension, bone fractures, and/or growth failure. New therapeutic approaches are under investigation, including ileal bile acid transporter (IBAT) inhibitors and other approaches that may involve targeted interventions to augment the Notch signaling pathway in involved tissues.
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Affiliation(s)
- Taisa J Kohut
- Division of Gastroenterology, Hepatology, and Nutrition, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Melissa A Gilbert
- Division of Genomic Diagnostics, Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Kathleen M Loomes
- Division of Gastroenterology, Hepatology, and Nutrition, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
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6
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Kamalakar A, McKinney JM, Salinas Duron D, Amanso AM, Ballestas SA, Drissi H, Willett NJ, Bhattaram P, García AJ, Wood LB, Goudy SL. JAGGED1 stimulates cranial neural crest cell osteoblast commitment pathways and bone regeneration independent of canonical NOTCH signaling. Bone 2021; 143:115657. [PMID: 32980561 PMCID: PMC9035226 DOI: 10.1016/j.bone.2020.115657] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/14/2020] [Accepted: 09/16/2020] [Indexed: 12/21/2022]
Abstract
Craniofacial bone loss is a complex clinical problem with limited regenerative solutions. Currently, BMP2 is used as a bone-regenerative therapy in adults, but in pediatric cases of bone loss, it is not FDA-approved due to concerns of life-threatening inflammation and cancer. Development of a bone-regenerative therapy for children will transform our ability to reduce the morbidity associated with current autologous bone grafting techniques. We discovered that JAGGED1 (JAG1) induces cranial neural crest (CNC) cell osteoblast commitment during craniofacial intramembranous ossification, suggesting that exogenous JAG1 delivery is a potential craniofacial bone-regenerative approach. In this study, we found that JAG1 delivery using synthetic hydrogels containing O9-1 cells, a CNC cell line, into critical-sized calvarial defects in C57BL/6 mice provided robust bone-regeneration. Since JAG1 signals through canonical (Hes1/Hey1) and non-canonical (JAK2) NOTCH pathways in CNC cells, we used RNAseq to analyze transcriptional pathways activated in CNC cells treated with JAG1 ± DAPT, a NOTCH-canonical pathway inhibitor. JAG1 upregulated expression of multiple NOTCH canonical pathway genes (Hes1), which were downregulated in the presence of DAPT. JAG1 also induced bone chemokines (Cxcl1), regulators of cytoskeletal organization and cell migration (Rhou), signaling targets (STAT5), promoters of early osteoblast cell proliferation (Prl2c2, Smurf1 and Esrra), and, inhibitors of osteoclasts (Id1). In the presence of DAPT, expression levels of Hes1 and Cxcl1 were decreased, whereas, Prl2c2, Smurf1, Esrra, Rhou and Id1 remain elevated, suggesting that JAG1 induces osteoblast proliferation through these non-canonical genes. Pathway analysis of JAG1 + DAPT-treated CNC cells revealed significant upregulation of multiple non-canonical pathways, including the cell cycle, tubulin pathway, regulators of Runx2 initiation and phosphorylation of STAT5 pathway. In total, our data show that JAG1 upregulates multiple pathways involved in osteogenesis, independent of the NOTCH canonical pathway. Moreover, our findings suggest that JAG1 delivery using a synthetic hydrogel, is a bone-regenerative approach with powerful translational potential.
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Affiliation(s)
| | - Jay M McKinney
- Wallace H. Coulter Department of Biomedical Engineering, USA; George W. Woodruff School of Mechanical Engineering, Georgia Tech College of Engineering, Atlanta, GA, USA; The Atlanta Veterans Affairs Medical Center Atlanta, GA, USA.
| | | | | | | | - Hicham Drissi
- Department of Cell Biology, USA; Department of Orthopaedics, Emory University, Atlanta, GA, USA; The Atlanta Veterans Affairs Medical Center Atlanta, GA, USA.
| | - Nick J Willett
- Department of Orthopaedics, Emory University, Atlanta, GA, USA; The Atlanta Veterans Affairs Medical Center Atlanta, GA, USA.
| | - Pallavi Bhattaram
- Department of Cell Biology, USA; Department of Orthopaedics, Emory University, Atlanta, GA, USA.
| | - Andrés J García
- Parker H. Petit Institute for Bioengineering and Biosciences, USA; George W. Woodruff School of Mechanical Engineering, Georgia Tech College of Engineering, Atlanta, GA, USA.
| | - Levi B Wood
- George W. Woodruff School of Mechanical Engineering, Georgia Tech College of Engineering, Atlanta, GA, USA.
| | - Steven L Goudy
- Department of Otolaryngology, USA; Department of Pediatric Otolaryngology, Children's Healthcare of Atlanta, Atlanta, GA, USA.
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7
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Zhang H, Xie J, So KKH, Tong KK, Sae-Pang JJ, Wang L, Tsang SL, Chan WY, Wong EYM, Sham MH. Hoxb3 Regulates Jag1 Expression in Pharyngeal Epithelium and Affects Interaction With Neural Crest Cells. Front Physiol 2021; 11:612230. [PMID: 33505317 PMCID: PMC7830521 DOI: 10.3389/fphys.2020.612230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/09/2020] [Indexed: 11/30/2022] Open
Abstract
Craniofacial morphogenesis depends on proper migration of neural crest cells and their interactions with placodes and other cell types. Hox genes provide positional information and are important in patterning the neural crest and pharyngeal arches (PAs) for coordinated formation of craniofacial structures. Hox genes are expressed in the surface ectoderm and epibranchial placodes, their roles in the pharyngeal epithelium and their downstream targets in regulating PA morphogenesis have not been established. We altered the Hox code in the pharyngeal region of the Hoxb3Tg/+ mutant, in which Hoxb3 is driven to ectopically expressed in Hoxb2 domain in the second pharyngeal arch (PA2). In the transgenic mutant, ectopic Hoxb3 expression was restricted to the surface ectoderm, including the proximal epibranchial placodal region and the distal pharyngeal epithelium. The Hoxb3Tg/+ mutants displayed hypoplasia of PA2, multiple neural crest-derived facial skeletal and nerve defects. Interestingly, we found that in the Hoxb3Tg/+ mutant, expression of the Notch ligand Jag1 was specifically up-regulated in the ectodermal pharyngeal epithelial cells of PA2. By molecular experiments, we demonstrated that Hoxb3 could bind to an upstream genomic site S2 and directly regulate Jag1 expression. In the Hoxb3Tg/+ mutant, elevated expression of Jag1 in the pharyngeal epithelium led to abnormal cellular interaction and deficiency of neural crest cells migrating into PA2. In summary, we showed that Hoxb3 regulates Jag1 expression and proposed a model of pharyngeal epithelium and neural crest interaction during pharyngeal arch development.
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Affiliation(s)
- Haoran Zhang
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Junjie Xie
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Karl Kam Hei So
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Ka Kui Tong
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Jearn Jang Sae-Pang
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Li Wang
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Sze Lan Tsang
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Wood Yee Chan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Elaine Yee Man Wong
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Mai Har Sham
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong.,School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
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8
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Bustos F, Segarra-Fas A, Nardocci G, Cassidy A, Antico O, Davidson L, Brandenburg L, Macartney TJ, Toth R, Hastie CJ, Moran J, Gourlay R, Varghese J, Soares RF, Montecino M, Findlay GM. Functional Diversification of SRSF Protein Kinase to Control Ubiquitin-Dependent Neurodevelopmental Signaling. Dev Cell 2020; 55:629-647.e7. [PMID: 33080171 PMCID: PMC7725506 DOI: 10.1016/j.devcel.2020.09.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 08/17/2020] [Accepted: 09/25/2020] [Indexed: 02/06/2023]
Abstract
Conserved protein kinases with core cellular functions have been frequently redeployed during metazoan evolution to regulate specialized developmental processes. The Ser/Arg (SR)-rich splicing factor (SRSF) protein kinase (SRPK), which is implicated in splicing regulation, is one such conserved eukaryotic kinase. Surprisingly, we show that SRPK has acquired the capacity to control a neurodevelopmental ubiquitin signaling pathway. In mammalian embryonic stem cells and cultured neurons, SRPK phosphorylates Ser-Arg motifs in RNF12/RLIM, a key developmental E3 ubiquitin ligase that is mutated in an intellectual disability syndrome. Processive phosphorylation by SRPK stimulates RNF12-dependent ubiquitylation of nuclear transcription factor substrates, thereby acting to restrain a neural gene expression program that is aberrantly expressed in intellectual disability. SRPK family genes are also mutated in intellectual disability disorders, and patient-derived SRPK point mutations impair RNF12 phosphorylation. Our data reveal unappreciated functional diversification of SRPK to regulate ubiquitin signaling that ensures correct regulation of neurodevelopmental gene expression.
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Affiliation(s)
- Francisco Bustos
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Anna Segarra-Fas
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Gino Nardocci
- Institute of Biomedical Sciences and FONDAP Center for Genome Regulation, Universidad Andrés Bello, Santiago, Chile
| | - Andrew Cassidy
- Tayside Centre for Genomic Analysis, School of Medicine, University of Dundee, Dundee DD1 9SY, UK
| | - Odetta Antico
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Lindsay Davidson
- School of Life Sciences, The University of Dundee, Dundee DD1 5EH, UK
| | - Lennart Brandenburg
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Thomas J Macartney
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Rachel Toth
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - C James Hastie
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Jennifer Moran
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Robert Gourlay
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Joby Varghese
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Renata F Soares
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK
| | - Martin Montecino
- Institute of Biomedical Sciences and FONDAP Center for Genome Regulation, Universidad Andrés Bello, Santiago, Chile
| | - Greg M Findlay
- The MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, the University of Dundee, Dundee DD1 5EH, UK.
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9
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Ankamreddy H, Bok J, Groves AK. Uncovering the secreted signals and transcription factors regulating the development of mammalian middle ear ossicles. Dev Dyn 2020; 249:1410-1424. [PMID: 33058336 DOI: 10.1002/dvdy.260] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/11/2020] [Accepted: 10/11/2020] [Indexed: 12/22/2022] Open
Abstract
The mammalian middle ear comprises a chain of ossicles, the malleus, incus, and stapes that act as an impedance matching device during the transmission of sound from the tympanic membrane to the inner ear. These ossicles are derived from cranial neural crest cells that undergo endochondral ossification and subsequently differentiate into their final functional forms. Defects that occur during middle ear development can result in conductive hearing loss. In this review, we summarize studies describing the crucial roles played by signaling molecules such as sonic hedgehog, bone morphogenetic proteins, fibroblast growth factors, notch ligands, and chemokines during the differentiation of neural crest into the middle ear ossicles. In addition to these cell-extrinsic signals, we also discuss studies on the function of transcription factor genes such as Foxi3, Tbx1, Bapx1, Pou3f4, and Gsc in regulating the development and morphology of the middle ear ossicles.
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Affiliation(s)
| | - Jinwoong Bok
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea.,Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, South Korea
| | - Andrew K Groves
- Department of Neuroscience, Baylor College of Medicine, Houston, Texas, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
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10
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Ankamreddy H, Koo H, Lee YJ, Bok J. CXCL12 is required for stirrup-shaped stapes formation during mammalian middle ear development. Dev Dyn 2020; 249:1117-1126. [PMID: 32319178 DOI: 10.1002/dvdy.180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 04/17/2020] [Accepted: 04/17/2020] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The mammalian middle ear comprises a chain of three ossicles-the malleus, incus, and stapes-each of which has a unique morphology for efficiently transmitting sound information. In particular, the stapes, which is attached to the inner ear, is stirrup-shaped with a head and base connected by two crural arches, forming the stapedial foramen, through which the stapedial artery passes. However, how the stapes acquires this critical stirrup shape for association with the stapedial artery during development is not clear. RESULTS C-X-C motif chemokine ligand 12 (CXCL12) is a chemoattractant essential for cellular movement and angiogenesis. In Cxcl12 -/- embryos, migration of neural crest cells into the prospective middle ear regions and their mesenchymal condensation to form the three ossicles proceed normally in correct alignment with each other and the inner ear. However, in the absence of CXCL12, the stapes loses its stirrup shape and instead exhibits a columnar shape lacking the crural arches and central hole. In addition, although the stapedial artery initially forms during early mesenchymal condensation of the stapes, it degenerates without CXCL12 function. CONCLUSION CXCL12 plays an essential role in establishing the stirrup-shaped architecture of the stapes, possibly by maintaining the stapedial foramen and stapedial artery throughout development.
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Affiliation(s)
- Harinarayana Ankamreddy
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea.,BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Heiyeun Koo
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea.,BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Young Jae Lee
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, South Korea
| | - Jinwoong Bok
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea.,BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea.,Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, South Korea
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11
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Pakvasa M, Haravu P, Boachie-Mensah M, Jones A, Coalson E, Liao J, Zeng Z, Wu D, Qin K, Wu X, Luo H, Zhang J, Zhang M, He F, Mao Y, Zhang Y, Niu C, Wu M, Zhao X, Wang H, Huang L, Shi D, Liu Q, Ni N, Fu K, Lee MJ, Wolf JM, Athiviraham A, Ho SS, He TC, Hynes K, Strelzow J, El Dafrawy M, Reid RR. Notch signaling: Its essential roles in bone and craniofacial development. Genes Dis 2020; 8:8-24. [PMID: 33569510 PMCID: PMC7859553 DOI: 10.1016/j.gendis.2020.04.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 03/25/2020] [Accepted: 04/03/2020] [Indexed: 02/08/2023] Open
Abstract
Notch is a cell–cell signaling pathway that is involved in a host of activities including development, oncogenesis, skeletal homeostasis, and much more. More specifically, recent research has demonstrated the importance of Notch signaling in osteogenic differentiation, bone healing, and in the development of the skeleton. The craniofacial skeleton is complex and understanding its development has remained an important focus in biology. In this review we briefly summarize what recent research has revealed about Notch signaling and the current understanding of how the skeleton, skull, and face develop. We then discuss the crucial role that Notch plays in both craniofacial development and the skeletal system, and what importance it may play in the future.
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Affiliation(s)
- Mikhail Pakvasa
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Pritzker School of Medicine, University of Chicago, Chicago, IL 60637, USA.,Section of Plastic and Reconstructive Surgery, Department of Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Pranav Haravu
- Pritzker School of Medicine, University of Chicago, Chicago, IL 60637, USA
| | - Michael Boachie-Mensah
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Pritzker School of Medicine, University of Chicago, Chicago, IL 60637, USA
| | - Alonzo Jones
- Pritzker School of Medicine, University of Chicago, Chicago, IL 60637, USA
| | - Elam Coalson
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Pritzker School of Medicine, University of Chicago, Chicago, IL 60637, USA
| | - Junyi Liao
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Departments of Orthopaedic Surgery, Gastrointestinal Surgery, Obstetrics and Gynecology, and Nephrology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Zongyue Zeng
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Ministry of Education Key Laboratory of Diagnostic Medicine, and School of Laboratory and Diagnostic Medicine, Chongqing Medical University, Chongqing, 400016, PR China
| | - Di Wu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Kevin Qin
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Xiaoxing Wu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Departments of Orthopaedic Surgery, Gastrointestinal Surgery, Obstetrics and Gynecology, and Nephrology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Huaxiu Luo
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Burn and Plastic Surgery, West China Hospital of Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Jing 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, Gastrointestinal Surgery, Obstetrics and Gynecology, and Nephrology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Meng Zhang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Orthopaedic Surgery, The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, 510405, PR China
| | - Fang He
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Departments of Orthopaedic Surgery, Gastrointestinal Surgery, Obstetrics and Gynecology, and Nephrology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Yukun Mao
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Departments of Orthopaedic Surgery and Neurosurgery, The Affiliated Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Yongtao Zhang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Orthopaedic Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266061, PR China
| | - Changchun Niu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Laboratory Diagnostic Medicine, Chongqing General Hospital, Chongqing, 400021, PR China
| | - Meng Wu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Institute of Bone and Joint Research, and the Department of Orthopaedic Surgery, The Second Hospitals of Lanzhou University, Gansu, Lanzhou, 730030, PR China
| | - Xia Zhao
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Orthopaedic Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266061, PR China
| | - Hao Wang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Ministry of Education Key Laboratory of Diagnostic Medicine, and School of Laboratory and Diagnostic Medicine, Chongqing Medical University, Chongqing, 400016, PR China
| | - Linjuan Huang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Departments of Orthopaedic Surgery, Gastrointestinal Surgery, Obstetrics and Gynecology, and Nephrology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Deyao Shi
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430072, PR China
| | - Qing Liu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Department of Spine Surgery, Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, PR China
| | - Na Ni
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Ministry of Education Key Laboratory of Diagnostic Medicine, and School of Laboratory and Diagnostic Medicine, Chongqing Medical University, Chongqing, 400016, PR China
| | - Kai Fu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Departments of Orthopaedic Surgery and Neurosurgery, The Affiliated Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Michael J Lee
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Jennifer Moriatis Wolf
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Aravind Athiviraham
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Sherwin S Ho
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Tong-Chuan He
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Kelly Hynes
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Jason Strelzow
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Mostafa El Dafrawy
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Russell R Reid
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA.,Section of Plastic and Reconstructive Surgery, Department of Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
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12
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Kamath BM, Ye W, Goodrich NP, Loomes KM, Romero R, Heubi JE, Leung DH, Spinner NB, Piccoli DA, Alonso EM, Guthery SL, Karpen SJ, Mack CL, Molleston JP, Murray KF, Rosenthal P, Squires JE, Teckman J, Wang KS, Thompson R, Magee JC, Sokol RJ. Outcomes of Childhood Cholestasis in Alagille Syndrome: Results of a Multicenter Observational Study. Hepatol Commun 2020; 4:387-398. [PMID: 33313463 PMCID: PMC7049675 DOI: 10.1002/hep4.1468] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 11/19/2019] [Indexed: 01/04/2023] Open
Abstract
Alagille syndrome (ALGS) is an autosomal dominant multisystem disorder with cholestasis as a defining clinical feature. We sought to characterize hepatic outcomes in a molecularly defined cohort of children with ALGS-related cholestasis. Two hundred and ninety-three participants with ALGS with native liver were enrolled. Participants entered the study at different ages and data were collected retrospectively prior to enrollment, and prospectively during the study course. Genetic analysis in 206 revealed JAGGED1 mutations in 91% and NOTCH2 mutations in 4%. Growth was impaired with mean height and weight z-scores of <-1.0 at all ages. Regression analysis revealed that every 10 mg/dL increase in total bilirubin was associated with a decrease in height z-score by 0.10 (P = 0.03) and weight z-score by 0.15 (P = 0.007). Total bilirubin was higher for younger participants (P = 0.03) with a median of 6.9 mg/dL for those less than 1 year old compared with a median of 1.3 mg/dL for participants 13 years or older. The median gamma glutamyl transferase also dropped from 612 to 268 in the same age groups. After adjusting for age, there was substantial within-individual variation of alanine aminotransferase. By 20 years of age, 40% of participants had developed definite portal hypertension. Estimated liver transplant-free survival at the age of 18.5 years was 24%. Conclusions: This is the largest multicenter natural history study of cholestasis in ALGS, demonstrating a previously underappreciated burden of liver disease with early profound cholestasis, a second wave of portal hypertension later in childhood, and less than 25% of patients reaching young adulthood with their native liver. These findings will promote optimization of ALGS management and development of clinically relevant endpoints for future therapeutic trials.
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Affiliation(s)
- Binita M. Kamath
- The Hospital for Sick ChildrenUniversity of TorontoTorontoONCanada
| | - Wen Ye
- Department of SurgeryUniversity of MichiganAnn ArborMI
| | | | - Kathleen M. Loomes
- The Children’s Hospital of PhiladelphiaPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA
| | - Rene Romero
- Children’s Healthcare of AtlantaEmory University School of MedicineAtlantaGA
| | - James E. Heubi
- Cincinnati Children’s Hospital Medical CenterCincinnatiOH
| | - Daniel H. Leung
- Baylor College of MedicineTexas Children’s HospitalHoustonTX
| | - Nancy B. Spinner
- The Children’s Hospital of PhiladelphiaPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA
| | - David A. Piccoli
- The Children’s Hospital of PhiladelphiaPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA
| | - Estella M. Alonso
- Ann and Robert H. Lurie Children’s HospitalNorthwestern UniversityChicagoIL
| | | | - Saul J. Karpen
- Children’s Healthcare of AtlantaEmory University School of MedicineAtlantaGA
| | - Cara L. Mack
- University of Colorado School of MedicineChildren’s Hospital ColoradoAuroraCO
| | | | - Karen F. Murray
- Seattle Children’s HospitalUniversity of Washington School of MedicineSeattleWA
| | - Philip Rosenthal
- Department of PediatricsUniversity of California, San FranciscoSan FranciscoCA
| | - James E. Squires
- Department of Gastroenterology and HepatologyUPMC Children’s Hospital of PittsburghPittsburghPA
| | - Jeffrey Teckman
- Department of PediatricsSaint Louis University School of MedicineSt. LouisMO
| | - Kasper S. Wang
- Department of SurgeryChildren’s Hospital Los AngelesLos AngelesCA
| | - Richard Thompson
- Institute of Liver StudiesKing’s College LondonLondonUnited Kingdom
| | - John C. Magee
- Department of SurgeryUniversity of MichiganAnn ArborMI
| | - Ronald J. Sokol
- University of Colorado School of MedicineChildren’s Hospital ColoradoAuroraCO
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13
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Naz S, Friedman TB. Growth factor and receptor malfunctions associated with human genetic deafness. Clin Genet 2019; 97:138-155. [PMID: 31506927 DOI: 10.1111/cge.13641] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/22/2019] [Accepted: 09/03/2019] [Indexed: 12/12/2022]
Abstract
A variety of different signaling pathways are necessary for development and maintenance of the human auditory system. Normal hearing allows for the detection of soft sounds within the frequency range of 20 to 20 000 Hz, but more importantly to perceive the human voice frequency band of 250 to 6000 Hz. Loss of hearing is common, and is a clinically heterogeneous disorder that can be caused by environmental factors such as exposure to loud noise, infections and ototoxic drugs. In addition, variants of hundreds of genes have been reported to disrupt processes required for hearing. Noncoding regulatory variants and variants of additional genes necessary for hearing remain to be discovered as many individuals with inherited deafness are without a genetic diagnosis, despite the advent of whole exome sequencing. Here, we discuss in detail some of these deafness-causing variants of genes encoding a ligand or its receptor. Spotlighted in this review are three growth factor-receptor-pairs EDN3/EDNRB, HGF/MET and JAG/NOTCH, which individually are necessary for normal hearing. We also offer our perspective on unanswered questions, future challenges and potential opportunities for treatments emerging from molecular genetic and mechanistic studies of deafness due to these causes.
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Affiliation(s)
- Sadaf Naz
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Thomas B Friedman
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland
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14
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Van Hul N, Lendahl U, Andersson ER. Mouse Models for Diseases in the Cholangiocyte Lineage. Methods Mol Biol 2019; 1981:203-236. [PMID: 31016657 DOI: 10.1007/978-1-4939-9420-5_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cholangiopathies are an important group of liver diseases affecting the biliary system, and the purpose of this review is to describe how diseases in the biliary system can be studied in mouse models. A particular focus is placed on mouse models for Alagille syndrome, a cholangiopathy with a strong genetic link to dysfunctional Notch signaling. Recently, a number of different genetic mouse models based on various manipulations of the Notch signaling pathway have been generated to study Alagille syndrome, and we discuss the resulting phenotypes, and possible causes for the phenotypic heterogeneity among the various models. In the final section, we provide a more general discussion on how well mouse models can be expected to mimic human liver disease, as well as an outlook toward the need for new technologies that can help us to gain new insights from mouse models for liver disease.
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Affiliation(s)
- Noémi Van Hul
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - Urban Lendahl
- Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden.
| | - Emma R Andersson
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden.,Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
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15
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Xu R, Xia Y, Passias PG, Protopsaltis T, Sciubba DM. Occipitocervical Osteotomies and Interfacet Grafts for Reduction of Occipitocervical Kyphosis and Basilar Invagination. World Neurosurg 2019; 127:391-396. [PMID: 30954738 DOI: 10.1016/j.wneu.2019.03.271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/26/2019] [Accepted: 03/27/2019] [Indexed: 12/30/2022]
Abstract
BACKGROUND Occipitocervical congenital pathologies involving instability of the atlantoaxial joint and basilar invagination are challenging to treat owing to the complex anatomy involving neurovascular structures at the skull base and the high-risk nature of surgery close to the brainstem. CASE DESCRIPTION A patient presented with Alagille syndrome with multiple segmentation/fusion anomalies of the cervical spine and craniocervical junction, including fusion of the skull base and occipital condyles and partial assimilation of the C1 anterior ring and C2 dens. The head was anteriorly displaced, with C2 located immediately below the foramen magnum. There was significant kyphotic angulation due to nonunion of the base of the dens and the body of C2. The patient underwent occipitocervical osteotomies and occiput-C2 interfacet grafts for reduction of occipitocervical kyphosis along with foramen magnum decompression and occiput-C6 fusion. The patient had significant neurologic improvement and sustained improved craniocervical alignment on last follow-up. CONCLUSIONS In patients with atlantoaxial instability with basilar invagination, posterior facet release, local distraction, and placement of cortical bone interbody grafts with occipitocervical fusion may be instrumental in reducing craniocervical kyphosis and compression by allowing anterior translation of the upper cervical spine relative to the skull. This method may be a safe and effective posterior-only approach for brainstem/spinal cord decompression for patients with complex craniocervical congenital malformations.
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Affiliation(s)
- Risheng Xu
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Yuanxuan Xia
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Peter G Passias
- Department of Orthopaedic Surgery, New York University, New York, New York, USA
| | | | - Daniel M Sciubba
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, Maryland, USA.
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16
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DeLaurier A. Evolution and development of the fish jaw skeleton. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2018; 8:e337. [PMID: 30378758 DOI: 10.1002/wdev.337] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 09/25/2018] [Accepted: 09/27/2018] [Indexed: 12/18/2022]
Abstract
The evolution of the jaw represents a key innovation in driving the diversification of vertebrate body plans and behavior. The pharyngeal apparatus originated as gill bars separated by slits in chordate ancestors to vertebrates. Later, with the acquisition of neural crest, pharyngeal arches gave rise to branchial basket cartilages in jawless vertebrates (agnathans), and later bone and cartilage of the jaw, jaw support, and gills of jawed vertebrates (gnathostomes). Major events in the evolution of jaw structure from agnathans to gnathostomes include axial regionalization of pharyngeal elements and formation of a jaw joint. Hox genes specify the anterior-posterior identity of arches, and edn1, dlx, hand2, Jag1b-Notch2 signaling, and Nr2f factors specify dorsal-ventral identity. The formation of a jaw joint, an important step in the transition from an un-jointed pharynx in agnathans to a hinged jaw in gnathostomes involves interaction between nkx3.2, hand2, and barx1 factors. Major events in jaw patterning between fishes and reptiles include changes to elements of the second pharyngeal arch, including a loss of opercular and branchiostegal ray bones and transformation of the hyomandibula into the stapes. Further changes occurred between reptiles and mammals, including the transformation of the articular and quadrate elements of the jaw joint into the malleus and incus of the middle ear. Fossils of transitional jaw phenotypes can be analyzed from a developmental perspective, and there exists potential to use genetic manipulation techniques in extant taxa to test hypotheses about the evolution of jaw patterning in ancient vertebrates. This article is categorized under: Comparative Development and Evolution > Evolutionary Novelties Early Embryonic Development > Development to the Basic Body Plan Comparative Development and Evolution > Body Plan Evolution.
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Affiliation(s)
- April DeLaurier
- Department of Biology and Geology, University of South Carolina Aiken, Aiken, South Carolina
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17
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Teng CS, Ting MC, Farmer DT, Brockop M, Maxson RE, Crump JG. Altered bone growth dynamics prefigure craniosynostosis in a zebrafish model of Saethre-Chotzen syndrome. eLife 2018; 7:37024. [PMID: 30375332 PMCID: PMC6207424 DOI: 10.7554/elife.37024] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 10/14/2018] [Indexed: 01/09/2023] Open
Abstract
Cranial sutures separate the skull bones and house stem cells for bone growth and repair. In Saethre-Chotzen syndrome, mutations in TCF12 or TWIST1 ablate a specific suture, the coronal. This suture forms at a neural-crest/mesoderm interface in mammals and a mesoderm/mesoderm interface in zebrafish. Despite this difference, we show that combinatorial loss of TCF12 and TWIST1 homologs in zebrafish also results in specific loss of the coronal suture. Sequential bone staining reveals an initial, directional acceleration of bone production in the mutant skull, with subsequent localized stalling of bone growth prefiguring coronal suture loss. Mouse genetics further reveal requirements for Twist1 and Tcf12 in both the frontal and parietal bones for suture patency, and to maintain putative progenitors in the coronal region. These findings reveal conservation of coronal suture formation despite evolutionary shifts in embryonic origins, and suggest that the coronal suture might be especially susceptible to imbalances in progenitor maintenance and osteoblast differentiation. Some of the most common birth defects involve improper development of the head and face. One such birth defect is called craniosynostosis. Normally, an infant’s skull bones are not fully fused together. Instead, they are held together by soft tissue that allows the baby’s skull to more easily pass through the birth canal. This tissue also houses specialized cells called stem cells that allow the brain and skull to grow with the child. But in craniosynostosis these stem cells behave abnormally, which fuses the skull bones together and prevents the skull and brain from growing properly during childhood. One form of craniosynostosis called Saethre-Chotzen syndrome is caused by mutations in one of two genes that ensure the proper separation of two bones in the roof of the skull. Mice with mutations in the mouse versions of these genes develop the same problem and are used to study this condition. Mouse studies have looked mostly at what happens after birth. Studies looking at what happens in embryos with these mutations could help scientists learn more. One way to do so would be to genetically engineer zebrafish with the equivalent mutations. This is because zebrafish embryos are transparent and grow outside their mother’s body, making it easier for scientists to watch them develop. Now, Teng et al. have grown zebrafish with mutations in the zebrafish versions of the genes that cause Saethre-Chotzen syndrome. In the experiments, imaging tools were used to observe the live fish as they developed. This showed that the stem cells in their skulls become abnormal much earlier than previous studies had suggested. Teng et al. also showed that similar stem cells are responsible for growth of the skull in zebrafish and mice. Babies with craniosynostosis often need multiple, risky surgeries to separate their skull bones and allow their brain and head to grow. Unfortunately, these bones often fuse again because they have abnormal stem cells. Teng et al. provide new information on what goes wrong in these stem cells. Hopefully, this new information will help scientists to one day correct the defective stem cells in babies with craniosynostosis, thus reducing the number of surgeries needed to correct the problem.
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Affiliation(s)
- Camilla S Teng
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, United States.,Department of Biochemistry, Keck School of Medicine, University of Southern California, Los Angeles, United States
| | - Man-Chun Ting
- Department of Biochemistry, Keck School of Medicine, University of Southern California, Los Angeles, United States
| | - D'Juan T Farmer
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, United States
| | - Mia Brockop
- Department of Biochemistry, Keck School of Medicine, University of Southern California, Los Angeles, United States
| | - Robert E Maxson
- Department of Biochemistry, Keck School of Medicine, University of Southern California, Los Angeles, United States
| | - J Gage Crump
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, United States
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18
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Barske L, Rataud P, Behizad K, Del Rio L, Cox SG, Crump JG. Essential Role of Nr2f Nuclear Receptors in Patterning the Vertebrate Upper Jaw. Dev Cell 2018; 44:337-347.e5. [PMID: 29358039 PMCID: PMC5801120 DOI: 10.1016/j.devcel.2017.12.022] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 11/17/2017] [Accepted: 12/20/2017] [Indexed: 01/12/2023]
Abstract
The jaw is central to the extensive variety of feeding and predatory behaviors across vertebrates. The bones of the lower but not upper jaw form around an early-developing cartilage template. Whereas Endothelin1 patterns the lower jaw, the factors that specify upper-jaw morphology remain elusive. Here, we identify Nuclear Receptor 2f genes (Nr2fs) as enriched in and required for upper-jaw formation in zebrafish. Combinatorial loss of Nr2fs transforms maxillary components of the upper jaw into lower-jaw-like structures. Conversely, nr2f5 misexpression disrupts lower-jaw development. Genome-wide analyses reveal that Nr2fs repress mandibular gene expression and early chondrogenesis in maxillary precursors. Rescue of lower-jaw defects in endothelin1 mutants by reducing Nr2f dosage further demonstrates that Nr2f expression must be suppressed for normal lower-jaw development. We propose that Nr2fs shape the upper jaw by protecting maxillary progenitors from early chondrogenesis, thus preserving cells for later osteogenesis.
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Affiliation(s)
- Lindsey Barske
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Pauline Rataud
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Kasra Behizad
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Lisa Del Rio
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Samuel G Cox
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - J Gage Crump
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.
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