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Inomata Y, Kawatani N, Yamashita H, Hattori F. Lgr6-expressing functional nail stem-like cells differentiated from human-induced pluripotent stem cells. PLoS One 2024; 19:e0303260. [PMID: 38743670 PMCID: PMC11093308 DOI: 10.1371/journal.pone.0303260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 04/23/2024] [Indexed: 05/16/2024] Open
Abstract
The nail matrix containing stem cell populations produces nails and may contribute to fingertip regeneration. Nails are important tissues that maintain the functions of the hand and foot for handling objects and locomotion. Tumor chemotherapy impairs nail growth and, in many cases, loses them, although not permanently. In this report, we have achieved the successful differentiation of nail stem (NS)-like cells from human-induced pluripotent stem cells (iPSCs) via digit organoids by stepwise stimulation, tracing the molecular processes involved in limb development. Comprehensive mRNA sequencing analysis revealed that the digit organoid global gene expression profile fits human finger development. The NS-like cells expressed Lgr6 mRNA and protein and produced type-I keratin, KRT17, and type-II keratin, KRT81, which are abundant in nails. Furthermore, we succeeded in producing functional Lgr6-reporter human iPSCs. The reporter iPSC-derived Lgr6-positive cells also produced KRT17 and KRT81 proteins in the percutaneously transplanted region. To the best of our knowledge, this is the first report of NS-like cell differentiation from human iPSCs. Our differentiation method and reporter construct enable the discovery of drugs for nail repair and possibly fingertip-regenerative therapy.
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Affiliation(s)
- Yukino Inomata
- Innovative Regenerative Medicine, Graduate School of Medicine, Kansai Medical University, Hirakata city, Osaka, Japan
- Osaka College of High-Technology, Osaka City, Osaka, Japan
| | - Nano Kawatani
- Innovative Regenerative Medicine, Graduate School of Medicine, Kansai Medical University, Hirakata city, Osaka, Japan
- Osaka College of High-Technology, Osaka City, Osaka, Japan
| | - Hiromi Yamashita
- Innovative Regenerative Medicine, Graduate School of Medicine, Kansai Medical University, Hirakata city, Osaka, Japan
| | - Fumiyuki Hattori
- Innovative Regenerative Medicine, Graduate School of Medicine, Kansai Medical University, Hirakata city, Osaka, Japan
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Sowińska-Seidler A, Socha M, Szoszkiewicz A, Materna-Kiryluk A, Jamsheer A. A genotype-phenotype correlation in split-hand/foot malformation type 1: further refinement of the phenotypic subregions within the 7q21.3 locus. Front Mol Biosci 2023; 10:1250714. [PMID: 37916192 PMCID: PMC10616856 DOI: 10.3389/fmolb.2023.1250714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/25/2023] [Indexed: 11/03/2023] Open
Abstract
Background: Split-hand/foot malformation type 1 (SHFM1) refers to the group of rare congenital limb disorders defined by the absence or hypoplasia of the central rays of the autopods with or without accompanying anomalies, such as hearing loss, craniofacial malformation, and ectodermal dysplasia. Consequently, the condition is characterized by clinical variability that hinders diagnostic and counseling procedures. SHFM1 is caused by pathogenic variants affecting the DLX5/6 genes and/or their tissue-specific enhancers at the 7q21.3 locus. Herein, we report on seven patients from five unrelated Polish families affected by variable symptoms of the SHFM1 spectrum, all harboring 7q21.3 or 7q21.2-q21.3 rearrangements, and provide a genotype-phenotype correlation in the studied cohort. Methods: We applied GTG banding, array-based comparative genomic hybridization (aCGH), and whole-genome sequencing (WGS) in order to identify the causative aberrations in all affected patients. Results: The identified pathogenic structural variants included deletions and/or translocations involving the 7q21.3 locus, i.e., t(7;10)(q21.3;q22.2) and t(7;12)(q21.3;q21.2) in all affected individuals. Interestingly, a sporadic carrier of the latter aberration presented the SHFM1 phenotype with additional features overlapping with Baker-Gordon syndrome (BAGOS), which resulted from the translocation breakpoint at chromosome 12 within the SYT1 gene. Conclusion: Clinical variability of the studied cohort reflects the composition of the DLX5/6 regulatory elements that were dislocated from their target genes by chromosomal rearrangements. The correlation of our data with the previously published observations enabled us to update the phenotypic subregions and regulatory units within the SHFM1 locus. In addition, we present the first case of SHFM1 and BAGOS-like phenotype that resulted from translocation breakpoints at chromosomes 7 and 12, both of which were pathogenic, and consequently, we show the first evidence that BAGOS can also result from the regulatory loss-of-function SYT1 mutations. In this paper, we emphasize the utility of sequence-based approaches in molecular diagnostics of disorders caused by regulatory structural variants.
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Affiliation(s)
- Anna Sowińska-Seidler
- Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - Magdalena Socha
- Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Poznan, Poland
| | - Anna Szoszkiewicz
- Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - Anna Materna-Kiryluk
- Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
- Centers for Medical Genetics GENESIS, Poznan, Poland
| | - Aleksander Jamsheer
- Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
- Centers for Medical Genetics GENESIS, Poznan, Poland
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3
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Sifre-Ruiz A, Sagasta A, Santos E, Perez de Nanclares G, Heath KE. New pathogenic variant in DLX5: New clues for a clinical spectrum from split-hand-foot malformation to fibular aplasia, tibial campomelia and oligosyndactyly. Front Genet 2023; 14:1165780. [PMID: 37124614 PMCID: PMC10133553 DOI: 10.3389/fgene.2023.1165780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/05/2023] [Indexed: 05/02/2023] Open
Abstract
Introduction: FATCO (Fibular Aplasia, Tibial Campomelia and Oligosyndactyly) is a very infrequent skeletal dysplasia classified within the limb hypoplasia-reduction defects group whose genetic cause has not yet been identified. The advent of next-generation sequencing is enabling the diagnosis of diseases with no previously known genetic cause. Methods: We performed a thorough autopsy on a fetus whose pregnancy was legally terminated due to severe malformations detected by ultrasound. A trio exome was run to identify the genetic cause and risk of recurrence. Previous literature of similar cases was systematically searched. Results: Anatomopathological analyses revealed complete fibular aplasia, shortened and campomelic tibia, absent ankle joint, club right foot and a split foot malformation, leading to the diagnosis of FATCO. Exome sequencing showed that the female fetus carried a de novo nonsense variant in DLX5. The literature search permitted the collection of information on 43 patients with FATCO, the majority of whom were males diagnosed postnatally. In most cases, lower limbs were affected exclusively, but in 39.5% of cases the upper limbs were also affected. Conclusion: The pathologies associated with DLX5 variants encompass a wide spectrum of manifestations ranging from abnormalities exclusively in the hands and feet to long bones such as the tibia and fibula.
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Affiliation(s)
- Anna Sifre-Ruiz
- Pathology Service, Bioaraba Research Health Institute, Araba University Hospital, Vitoria-Gasteiz, Spain
| | - Amaia Sagasta
- Pathology Service, Bioaraba Research Health Institute, Araba University Hospital, Vitoria-Gasteiz, Spain
| | - Erika Santos
- Radiodiagnostic Service, Araba University Hospital, Vitoria-Gasteiz, Spain
| | - Guiomar Perez de Nanclares
- Rare Diseases Research Group, Molecular (Epi)Genetics Laboratory, Bioaraba Research Health Institute, Araba University Hospital-Txagorritxu, Vitoria-Gasteiz, Araba, Spain
- *Correspondence: Guiomar Perez de Nanclares, ; Karen E. Heath,
| | - Karen E. Heath
- Institute of Medical and Molecular Genetics (INGEMM), IdiPAZ, Hospital Universitario La Paz, Universidad Autónoma de Madrid, Madrid, Spain
- Skeletal Dysplasia Multidisciplinary Unit (UMDE), ERN-BOND, Hospital Universitario La Paz, Madrid, Spain
- CIBERER, ISCIII, Madrid, Spain
- *Correspondence: Guiomar Perez de Nanclares, ; Karen E. Heath,
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4
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Levi G, de Lombares C, Giuliani C, Iannuzzi V, Aouci R, Garagnani P, Franceschi C, Grimaud-Hervé D, Narboux-Nême N. DLX5/6 GABAergic Expression Affects Social Vocalization: Implications for Human Evolution. Mol Biol Evol 2021; 38:4748-4764. [PMID: 34132815 PMCID: PMC8557472 DOI: 10.1093/molbev/msab181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
DLX5 and DLX6 are two closely related transcription factors involved in brain development and in GABAergic differentiation. The DLX5/6 locus is regulated by FoxP2, a gene involved in language evolution and has been associated with neurodevelopmental disorders and mental retardation. Targeted inactivation of Dlx5/6 in mouse GABAergic neurons (Dlx5/6VgatCre mice) results in behavioral and metabolic phenotypes notably increasing lifespan by 33%. Here, we show that Dlx5/6VgatCre mice present a hyper-vocalization and hyper-socialization phenotype. While only 7% of control mice emitted more than 700 vocalizations/10 min, 30% and 56% of heterozygous or homozygous Dlx5/6VgatCre mice emitted more than 700 and up to 1,400 calls/10 min with a higher proportion of complex and modulated calls. Hyper-vocalizing animals were more sociable: the time spent in dynamic interactions with an unknown visitor was more than doubled compared to low-vocalizing individuals. The characters affected by Dlx5/6 in the mouse (sociability, vocalization, skull, and brain shape…) overlap those affected in the "domestication syndrome". We therefore explored the possibility that DLX5/6 played a role in human evolution and "self-domestication" comparing DLX5/6 genomic regions from Neanderthal and modern humans. We identified an introgressed Neanderthal haplotype (DLX5/6-N-Haplotype) present in 12.6% of European individuals that covers DLX5/6 coding and regulatory sequences. The DLX5/6-N-Haplotype includes the binding site for GTF2I, a gene associated with Williams-Beuren syndrome, a hyper-sociability and hyper-vocalization neurodevelopmental disorder. The DLX5/6-N-Haplotype is significantly underrepresented in semi-supercentenarians (>105 years of age), a well-established human model of healthy aging and longevity, suggesting their involvement in the coevolution of longevity, sociability, and speech.
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Affiliation(s)
- Giovanni Levi
- Physiologie Moléculaire et Adaptation, CNRS UMR7221, Département AVIV, Muséum National d'Histoire Naturelle, Paris, France
| | - Camille de Lombares
- Physiologie Moléculaire et Adaptation, CNRS UMR7221, Département AVIV, Muséum National d'Histoire Naturelle, Paris, France
| | - Cristina Giuliani
- Laboratory of Molecular Anthropology & Centre for Genome Biology, Department of Biological, Geological and Environmental Sciences, University of Bologna, Italy
| | - Vincenzo Iannuzzi
- Alma Mater Research Institute on Global Challenges and Climate Change, University of Bologna, Italy
| | - Rym Aouci
- Physiologie Moléculaire et Adaptation, CNRS UMR7221, Département AVIV, Muséum National d'Histoire Naturelle, Paris, France
| | - Paolo Garagnani
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
- Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institutet at Huddinge University Hospital, Stockholm, Sweden
| | - Claudio Franceschi
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
- Institute of Information Technologies, Mathematics and Mechanics, Lobachevsky University, Nizhniy Novgorod, Russia
| | - Dominique Grimaud-Hervé
- Histoire Naturelle de l’Homme Préhistorique, CNRS UMR 7194, Département H&E, Muséum National d'Histoire Naturelle, Paris, France
| | - Nicolas Narboux-Nême
- Physiologie Moléculaire et Adaptation, CNRS UMR7221, Département AVIV, Muséum National d'Histoire Naturelle, Paris, France
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5
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Galea GL, Zein MR, Allen S, Francis-West P. Making and shaping endochondral and intramembranous bones. Dev Dyn 2020; 250:414-449. [PMID: 33314394 PMCID: PMC7986209 DOI: 10.1002/dvdy.278] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/13/2020] [Accepted: 11/20/2020] [Indexed: 12/13/2022] Open
Abstract
Skeletal elements have a diverse range of shapes and sizes specialized to their various roles including protecting internal organs, locomotion, feeding, hearing, and vocalization. The precise positioning, size, and shape of skeletal elements is therefore critical for their function. During embryonic development, bone forms by endochondral or intramembranous ossification and can arise from the paraxial and lateral plate mesoderm or neural crest. This review describes inductive mechanisms to position and pattern bones within the developing embryo, compares and contrasts the intrinsic vs extrinsic mechanisms of endochondral and intramembranous skeletal development, and details known cellular processes that precisely determine skeletal shape and size. Key cellular mechanisms are employed at distinct stages of ossification, many of which occur in response to mechanical cues (eg, joint formation) or preempting future load‐bearing requirements. Rapid shape changes occur during cellular condensation and template establishment. Specialized cellular behaviors, such as chondrocyte hypertrophy in endochondral bone and secondary cartilage on intramembranous bones, also dramatically change template shape. Once ossification is complete, bone shape undergoes functional adaptation through (re)modeling. We also highlight how alterations in these cellular processes contribute to evolutionary change and how differences in the embryonic origin of bones can influence postnatal bone repair. Compares and contrasts Endochondral and intramembranous bone development Reviews embryonic origins of different bones Describes the cellular and molecular mechanisms of positioning skeletal elements. Describes mechanisms of skeletal growth with a focus on the generation of skeletal shape
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Affiliation(s)
- Gabriel L Galea
- Developmental Biology and Cancer, UCL GOS Institute of Child Health, London, UK.,Comparative Bioveterinary Sciences, Royal Veterinary College, London, UK
| | - Mohamed R Zein
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, UK
| | - Steven Allen
- Comparative Bioveterinary Sciences, Royal Veterinary College, London, UK
| | - Philippa Francis-West
- Centre for Craniofacial and Regenerative Biology, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, UK
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6
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Funk CR, Huey ES, May MM, Peng Y, Michonova E, Best RG, Schwartz CE, Blenda AV. Rare missense variant p.Ala505Ser in the ZAK protein observed in a patient with split-hand/foot malformation from a non-consanguineous pedigree. J Int Med Res 2020; 48:300060519879293. [PMID: 32266845 PMCID: PMC7144677 DOI: 10.1177/0300060519879293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Objective Split-hand/foot malformation (SHFM) is a rare, often debilitating, congenital limb malformation. A single nucleotide polymorphism within the leucine zipper containing kinase AZK (ZAK) gene was recently associated with SHFM in two consanguineous Pakistani pedigrees. We hypothesized that additional unrelated patients with the phenotype may carry a pathogenic mutation in ZAK. Methods DNA samples were collected from 38 patients with SHFM and associated hearing loss for Sanger DNA sequencing and in silico analysis. Results Two missense mutations within ZAK were detected in 11 patients, but only one missense variant, p.Ala505Ser, occurred with a presumed rare allele frequency. In silico modeling of the ZAK protein with the p.Ala505Ser substitution indicated a negative binding free energy change (mean ΔΔG = −0.9), representing destabilization of the ZAK tertiary structure. Additional laboratory analysis demonstrated a chromosome region 7q21.3-q22.1 deletion. This locus contains the SHFM-1 causative genes SHFM1, DLX5, and DLX6 (distal-less homeobox-5 and -6). Conclusions We report a novel and rare missense variant, ZAK p.Ala505Ser, in one patient with SHFM from a non-consanguineous pedigree. This variant mildly destabilizes the ZAK tertiary structure. Although this mutation involved a deletion at the SHFM1 locus (7q21.3-q22.1), ZAK signaling destabilization may have contributed to the phenotype, which included hearing loss.
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MESH Headings
- Alleles
- Amino Acid Substitution
- Animals
- Chromosome Deletion
- Chromosomes, Human, Pair 7
- DNA Mutational Analysis
- Disease Models, Animal
- Evolution, Molecular
- Genetic Association Studies
- Genetic Predisposition to Disease
- Humans
- Limb Deformities, Congenital/diagnosis
- Limb Deformities, Congenital/genetics
- Limb Deformities, Congenital/metabolism
- MAP Kinase Kinase Kinases/chemistry
- MAP Kinase Kinase Kinases/genetics
- MAP Kinase Kinase Kinases/metabolism
- Mice
- Mice, Knockout
- Models, Molecular
- Mutation, Missense
- Polymorphism, Single Nucleotide
- Protein Conformation
- Signal Transduction
- Structure-Activity Relationship
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Affiliation(s)
- Christopher Ronald Funk
- J.C. Self Research Institute, Greenwood Genetic Center, Greenwood, SC, United States
- Emory University School of Medicine, Atlanta, GA, United States
| | - Elizabeth S. Huey
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC, United States
| | - Melanie M. May
- J.C. Self Research Institute, Greenwood Genetic Center, Greenwood, SC, United States
| | - Yunhui Peng
- Computational Biophysics and Bioinformatics Laboratory, Department of Physics and Astronomy, Clemson University, Clemson, SC, United States
| | - Ekaterina Michonova
- Department of Chemistry and Physics, Erskine College, Due West, SC, United States
| | - Robert G. Best
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC, United States
| | - Charles E. Schwartz
- J.C. Self Research Institute, Greenwood Genetic Center, Greenwood, SC, United States
| | - Anna V. Blenda
- Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, Greenville, SC, United States
- Anna V. Blenda, Department of Biomedical Sciences, University of South Carolina School of Medicine Greenville, 701 Grove Rd, Greenville, SC 29605, United States.
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7
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Alibardi L. Immunolocalization of Wnts in the lizard blastema supports a key role of these signaling proteins for tail regeneration. J Morphol 2019; 281:68-80. [PMID: 31721289 DOI: 10.1002/jmor.21080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/30/2019] [Accepted: 10/25/2019] [Indexed: 12/13/2022]
Abstract
A highly upregulated gene during tail regeneration in lizards is Wnt2b, a gene broadly expressed during development. The present study examines the distribution of Wnt proteins, most likely wnt2b, by western blotting and immunofluorescence in the blastema-cone of lizards using a specific antibody produced against a lizard Wnt2b protein. Immunopositive bands at 48-50 and 18 kDa are present in the regenerative blastema, the latter likely as a degradation product. Immunofluorescence is mainly observed in the wound epidermis, including in the Apical Epidermal Peg where the protein appears localized in intermediate and differentiating keratinocytes. Labeling is more intense along the perimeter of keratinocytes, possibly as a secretory product, and indicates that the high epidermal proliferation of the regenerating epidermis is sustained by Wnt proteins. The regenerating spinal cord forms an ependymal tube within the blastema and shows immunolabeling especially in the cytoplasm of ependymal cells contacting the central canal where some secretion might occur. Also, regenerating nerves and proximal spinal ganglia innervating the regenerating blastema contain this signaling protein. In contrast, the blastema mesenchyme, muscles and cartilage show weak immunolabeling that tends to disappear in tissues located in more proximal regions, close to the original tail. However, a distal to proximal gradient of Wnt proteins was not detected. The present study supports the hypothesis that Wnt proteins, in particular Wnt2b, are secreted by the apical epidermis covering the blastema and released into the mesenchyme where they stimulate cell multiplication.
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Affiliation(s)
- Lorenzo Alibardi
- Comparative Histolab Padova and Department of Biology, University of Bologna, Bologna, Italy
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8
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Kantaputra PN, Carlson BM. Genetic regulatory pathways of split-hand/foot malformation. Clin Genet 2018; 95:132-139. [PMID: 30101460 DOI: 10.1111/cge.13434] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 08/07/2018] [Indexed: 12/13/2022]
Abstract
Split-hand/foot malformation (SHFM) is caused by mutations in TP63, DLX5, DLX6, FGF8, FGFR1, WNT10B, and BHLHA9. The clinical features of SHFM caused by mutations of these genes are not distinguishable. This implies that in normal situations these SHFM-associated genes share an underlying regulatory pathway that is involved in the development of the central parts of the hands and feet. The mutations in SHFM-related genes lead to dysregulation of Fgf8 in the central portion of the apical ectodermal ridge (AER) and subsequently lead to misexpression of a number of downstream target genes, failure of stratification of the AER, and thus SHFM. Syndactyly of the remaining digits is most likely the effects of dysregulation of Fgf-Bmp-Msx signaling on apoptotic cell death. Loss of digit identity in SHFM is hypothesized to be the effects of misexpression of HOX genes, abnormal SHH gradient, or the loss of balance between GLI3A and GLI3R. Disruption of canonical and non-canonical Wnt signaling is involved in the pathogenesis of SHFM. Whatever the causative genes of SHFM are, the mutations seem to lead to dysregulation of Fgf8 in AER cells of the central parts of the hands and feet and disruption of Wnt-Bmp-Fgf signaling pathways in AER.
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Affiliation(s)
- Piranit N Kantaputra
- Center of Excellence in Medical Genetics Research, Chiang Mai University, Chiang Mai, Thailand.,Division of Pediatric Dentistry, Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.,Dentaland Clinic, Chiang Mai, Thailand
| | - Bruce M Carlson
- Department of Anatomy and Cell Biology, University of Michigan, Ann Arbor, Michigan
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9
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Kantaputra PN, Kapoor S, Verma P, Intachai W, Ketudat Cairns JR. Split hand-foot malformation and a novel WNT10B mutation. Eur J Med Genet 2018; 61:372-375. [PMID: 29427788 DOI: 10.1016/j.ejmg.2018.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 01/29/2018] [Accepted: 02/02/2018] [Indexed: 01/08/2023]
Abstract
We report an Indian girl with split-hand/foot malformation (SHFM), sparse hair, and interrupted eyebrows, who carries a novel homozygous deletion c.695_697delACA in WNT10B. The variant is deduced to cause an in-frame deletion of Asn residue 232 (p.Asn232del). According to the protein model, this single amino acid deletion at the critical position in the protein structure is likely to severely affect the protein structure and function. This deletion is likely to lead decreased lifetime and make it unable to bind to its receptors and other ligands. The patient and all family members had normal bone density and they were not obese like some of the patients with WNT10B variants. Here we report a patient with SHFM6 who carried a novel WNT10B mutation. Sparse hair and interrupted eyebrows may be associated findings of SHFM6.
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Affiliation(s)
- Piranit Nik Kantaputra
- Center of Excellence in Medical Genetics Research, Chiang Mai University, Division of Pediatric Dentistry, Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand; DENTALAND CLINIC, Chiang Mai, Thailand.
| | - Seema Kapoor
- Pediatrics Research & Genetic Lab, Department of Pediatrics, MAMC & Associated Lok Nayak Hospital, New Delhi, India
| | - Prashant Verma
- Pediatrics Research & Genetic Lab, Department of Pediatrics, MAMC & Associated Lok Nayak Hospital, New Delhi, India
| | - Worrachet Intachai
- Center of Excellence in Medical Genetics Research, Chiang Mai University, Division of Pediatric Dentistry, Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - James R Ketudat Cairns
- School of Chemistry, Institute of Science, and Center for Biomolecular Structure, Function and Application, Suranaree University of Technology, Nakhon Ratchasima, Thailand; Laboratory of Biochemistry, Chulabhorn Research Institute, Bangkok, Thailand
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10
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Split-Hand Malformation in a 4-Year-Old Child. Case Rep Pediatr 2017; 2017:6073619. [PMID: 28840051 PMCID: PMC5559908 DOI: 10.1155/2017/6073619] [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: 04/27/2017] [Revised: 06/15/2017] [Accepted: 07/05/2017] [Indexed: 11/29/2022] Open
Abstract
Split-hand deformity is one of the milder manifestations of a congenital disorder called split-hand/split-foot malformation. We present a case of a 4-year-old child with split-hand malformation in his left hand since birth. A median cleft was present in the affected hand with absence of the 3rd and 4th digits, giving rise to a characteristic lobster-claw appearance. Functionality of the affected hand was modestly impaired. As none of the close family members of the patient had similar limb malformations, the deformity was postulated to arise most likely from a de novo mutation. The patient was discharged after the parents were provided with genetic counseling.
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11
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Diogo R, Guinard G, Diaz RE. Dinosaurs, Chameleons, Humans, and Evo-Devo Path: Linking Étienne Geoffroy's Teratology, Waddington's Homeorhesis, Alberch's Logic of "Monsters," and Goldschmidt Hopeful "Monsters". JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2016; 328:207-229. [PMID: 28422426 DOI: 10.1002/jez.b.22709] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 09/29/2016] [Accepted: 10/03/2016] [Indexed: 12/12/2022]
Abstract
Since the rise of evo-devo (evolutionary developmental biology) in the 1980s, few authors have attempted to combine the increasing knowledge obtained from the study of model organisms and human medicine with data from comparative anatomy and evolutionary biology in order to investigate the links between development, pathology, and macroevolution. Fortunately, this situation is slowly changing, with a renewed interest in evolutionary developmental pathology (evo-devo-path) in the past decades, as evidenced by the idea to publish this special, and very timely, issue on "Developmental Evolution in Biomedical Research." As all of us have recently been involved, independently, in works related in some way or another with evolution and developmental anomalies, we decided to join our different perspectives and backgrounds in the present contribution for this special issue. Specifically, we provide a brief historical account on the study of the links between evolution, development, and pathologies, followed by a review of the recent work done by each of us, and then by a general discussion on the broader developmental and macroevolutionary implications of our studies and works recently done by other authors. Our primary aims are to highlight the strength of studying developmental anomalies within an evolutionary framework to understand morphological diversity and disease by connecting the recent work done by us and others with the research done and broader ideas proposed by authors such as Étienne Geoffroy Saint-Hilaire, Waddington, Goldschmidt, Gould, and Per Alberch, among many others to pave the way for further and much needed work regarding abnormal development and macroevolution.
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Affiliation(s)
- Rui Diogo
- Department of Anatomy, College of Medicine, Howard University, Washington, District of Columbia
| | - Geoffrey Guinard
- UMR CNRS 5561, Biogéosciences, Université de Bourgogne, Dijon, France
| | - Raul E Diaz
- Department of Biology, La Sierra University, Riverside, California.,Natural History Museum of Los Angeles County, Los Angeles, California
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KLF4 transcriptionally activates non-canonical WNT5A to control epithelial stratification. Sci Rep 2016; 6:26130. [PMID: 27184424 PMCID: PMC4869036 DOI: 10.1038/srep26130] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 04/27/2016] [Indexed: 01/15/2023] Open
Abstract
Epithelial differentiation and stratification are essential for normal homeostasis, and disruption of these processes leads to both injury and cancer. The zinc-finger transciption factor KLF4 is a key driver of epithelial differentiation, yet the mechanisms and targets by which KLF4 controls differentiation are not well understood. Here, we define WNT5A, a non-canonical Wnt ligand implicated in epithelial differentiation, repair, and cancer, as a direct transcriptional target that is activated by KLF4 in squamous epithelial cells. Further, we demonstrate functionally that WNT5A mediates KLF4 control of epithelial differentiation and stratification, as treatment of keratinocytes with WNT5A rescues defective epithelial stratification resulting from KLF4 loss. Finally, we show that the small GTPase CDC42 is regulated by KLF4 in a WNT5A dependent manner. As such, we delineate a novel pathway for epithelial differentiation and stratification and define potential therapeutic targets for epithelial diseases.
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