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Bilal M, Haack TB, Buchert R, Peralta S, Ahmad I, Faisal, Abbasi S, Ahmad W. Sequence Variants in the WNT10B Underlying Non-Syndromic Split-Hand/Foot Malformation. Mol Syndromol 2023; 14:469-476. [PMID: 38058757 PMCID: PMC10697732 DOI: 10.1159/000531069] [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: 04/20/2023] [Accepted: 05/10/2023] [Indexed: 12/08/2023] Open
Abstract
Introduction Split hand and foot malformation (SHFM) or ectrodactyly is a rare limb deformity characterized by median cleft of the hand and foot with impaired or missing central rays. It can occur as an isolated anomaly or in association with abnormalities of other body parts. Methods After delineating the clinical features of two families (A-B), with non-syndromic SHFM, exome and Sanger sequencing were employed to search for the disease-causing variants. Results Analysis of exome and Sanger sequencing data revealed two causative variants in the WNT10B gene in affected members of the two families. This included a novel missense change [c.338G>C; p.(Gly113Ala)] in family A and a previously reported frameshift variant [c.884-896delTCCAGCCCCGTCT; p.(Phe295Cysfs*87)] in family B. Conclusion Our findings add a novel variant in WNT10B gene as the underlying cause of SHFM. The finding adds to the growing body of knowledge about the genetic basis of developmental disorders and provides valuable insights into the molecular mechanisms that regulate limb development.
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Affiliation(s)
- Muhammad Bilal
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
- Department of Pathology and Laboratory Medicine, Aga Khan University, Karachi, Pakistan
- Institute for Medical Genetics and Applied Genomics, University of Tuebingen, Tuebingen, Germany
| | - Tobias B. Haack
- Institute for Medical Genetics and Applied Genomics, University of Tuebingen, Tuebingen, Germany
| | - Rebecca Buchert
- Institute for Medical Genetics and Applied Genomics, University of Tuebingen, Tuebingen, Germany
| | - Susana Peralta
- Institute for Medical Genetics and Applied Genomics, University of Tuebingen, Tuebingen, Germany
| | - Imtiaz Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Faisal
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Sanaullah Abbasi
- Department of Biochemistry, Shah Abdul Latif, Khairpur, Pakistan
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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2
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Said NM, Yassin F, Elkreem EA. Wnt10a missense gene polymorphism association with obesity risk: List of literature and a case-control study with Roc analysis for serum β-catenin level in Egypt. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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3
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Elalaoui SC, Fejjal N, Li Y, Thiele H, Altmüller J, Guaoua S, Nürnberg P, Wollnik B, Sefiani A, Ratbi I. Homozygous nonsense mutation of WNT10B gene in a Moroccan family with split-hand foot malformation identified by exome sequencing: a case report. Pan Afr Med J 2021; 39:21. [PMID: 34394812 PMCID: PMC8348243 DOI: 10.11604/pamj.2021.39.21.26176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 04/28/2021] [Indexed: 11/11/2022] Open
Abstract
Split-hand foot malformation (SHFM) is a clinically heterogeneous congenital limb defect affecting predominantly the central rays of hands and/or feet. The clinical expression varies in severity between patients as well between the limbs in the same individual. SHFM might be non-syndromic with limb-confined manifestations or syndromic with extra-limb manifestations. Isolated SHFM is a rare condition with an incidence of about 1 per 18,000 live born infants and accounts for 8-17 % of all limb malformations. To date, many chromosomal loci and genes have been described as associated with isolated SHFM, i.e., SHFM1 to 6. SHFM6 is one of the rarest forms of SHFM, and is caused by mutations in WNT10B gene. Less than ten pathogenic variants have been described. We have investigated a large consanguineous Moroccan family with three affected members showing feet malformations with or without split hand malformation phenotypes. Using an exome sequencing approach, we identified a homozygous nonsense variant p.Arg115* of WNT10B gene retaining thereby the diagnosis of SHFM6. This homozygous nonsense mutation identified by exome sequencing in a large family of split hand foot malformation highlights the importance of exome sequencing in genetically heterogeneous entities.
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Affiliation(s)
- Siham Chafai Elalaoui
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University in Rabat, Rabat, Maroc.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Maroc
| | - Nawfal Fejjal
- Service de Chirurgie Plastique Pédiatrique, Hôpital des Enfants, Centre Hospitalier Universitaire Ibn Sina, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Yun Li
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany.,Institute of Human Genetics, University Hospital Cologne, University of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Holger Thiele
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Janine Altmüller
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Soukaina Guaoua
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University in Rabat, Rabat, Maroc
| | - Peter Nürnberg
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Bernd Wollnik
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany.,Institute of Human Genetics, University Hospital Cologne, University of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Abdelaziz Sefiani
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University in Rabat, Rabat, Maroc.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Maroc
| | - Ilham Ratbi
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University in Rabat, Rabat, Maroc.,Département de Génétique Médicale, Institut National d'Hygiène, Rabat, Maroc
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4
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Bilal M, Ahmad W. A Frameshift Variant in KIAA0825 Causes Postaxial Polydactyly. Mol Syndromol 2020; 12:20-24. [PMID: 33776623 DOI: 10.1159/000512062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 10/06/2020] [Indexed: 01/07/2023] Open
Abstract
Postaxial polydactyly (PAP) is characterized by counterproductive 5th digit (pinky finger) duplication on hands and/or feet which often leads to functional complications. To date, at least 11 genes involved in causing various types of nonsyndromic polydactylies have been reported. In the present study, a consanguineous family of Sindhi origin with a segregating nonsyndromic form of PAP in an autosomal recessive manner was clinically and genetically evaluated. Genotyping, using polymorphic microsatellite markers, established linkage in the family on chromosome 5q15 harboring the KIAA0825 gene (MIM 617266). Sequence analysis of the gene revealed a novel frameshift variant leading to a premature stop codon [c.143delG, p.(Cys48Serfs*28)]. This is only the 4th novel variant in the KIAA0825 gene that leads to PAP type A10 (PAPA10) (MIM 618498). Identification of variants in the PAP causative gene will support the diagnosis of patients with limb malformations in the Pakistani population.
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Affiliation(s)
- Muhammad Bilal
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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5
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Bilal M, Hayat A, Umair M, Ullah A, Khawaja S, Malik E, Burmeister M, Bibi N, Umm-E-Kalsoom, Memon MI, Basit S, Ahmad W, Khan B. Sequence Variants in the WNT10B and TP63 Genes Underlying Isolated Split-Hand/Split-Foot Malformation. Genet Test Mol Biomarkers 2020; 24:600-607. [PMID: 32762550 DOI: 10.1089/gtmb.2020.0024] [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] [Indexed: 12/26/2022] Open
Abstract
Aims: Split-hand/split-foot malformation (SHFM) is a developmental and congenital limb malformation characterized by variable degrees of medial clefting or absence of one or more digits in hands and/or feet. The aim of this study was to identify the underlying cause of three consanguineous Pakistani families showing various types of SHFM-related features. Materials and Methods: Standard molecular methods, including whole-genome sequencing (WGS), whole-exome sequencing (WES), microsatellite markers-based genotyping, and Sanger sequencing were performed to search for the likely causative variants. Results: In family A, WES revealed a novel homozygous missense variant [c.338G>A, p.(Gly113Asp)] in the WNT10B gene. In family B, microsatellite-based genotyping followed by Sanger sequencing revealed a novel homozygous 13 base pairs deletion [c.884-896delTCCAGCCCCGTCT, p.(Phe295Cysfs*87)] in the same gene. In family C, WGS divulged a previously reported heterozygous missense variant [c.956G>A, p.(Arg319His)] in the TP63 gene. Conclusions: Mapping and sequencing genes and variants for severe skeletal disorders, such as SHRM, will facilitate establishing specific genotype-phenotype correlations and providing genetic counseling for the families suffering from such conditions.
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Affiliation(s)
- Muhammad Bilal
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Amir Hayat
- Department of Biochemistry, Abdul Wali Khan University, Mardan, Pakistan
| | - Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Asmat Ullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.,Department of Molecular Biology, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan.,Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, USA
| | - Sundus Khawaja
- Department of Biotechnology, University of Azad Jammu & Kashmir, Muzaffarabad, Pakistan
| | - Erum Malik
- Department of Biochemistry, Shah Abdul Latif University, Khairpur, Pakistan
| | - Margit Burmeister
- Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, USA
| | - Nousheen Bibi
- Department of Bioinformatics, Shaheed Benazir Bhutto Women University, Peshawar, Pakistan
| | - Umm-E-Kalsoom
- Department of Biochemistry, Hazara University Mansehra, Mansehra, Pakistan
| | - Muhammad Iqbal Memon
- Department of Anesthesia and Critical Care, PIMS, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
| | - Sulman Basit
- Center for Genetics and Inherited Diseases, Taibah University, Medina, Saudi Arabia
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Bushra Khan
- Department of Biochemistry, Abdul Wali Khan University, Mardan, Pakistan
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6
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Khan A, Wang R, Han S, Umair M, Alshabeeb MA, Ansar M, Ahmad W, Alaamery M, Zhang X. A Novel Homozygous Nonsense Mutation p.Cys366* in the WNT10B Gene Underlying Split-Hand/Split Foot Malformation in a Consanguineous Pakistani Family. Front Pediatr 2020; 7:526. [PMID: 31998667 PMCID: PMC6970189 DOI: 10.3389/fped.2019.00526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 12/04/2019] [Indexed: 02/04/2023] Open
Abstract
Split hand/split foot malformation (SHFM) or ectrodactyly is characterized by a deep median cleft of the hand or foot, hypoplasia or aplasia of the metacarpals, metatarsals, and phalanges. It is a clinically and genetically heterogeneous group of limb malformations. This study aimed to identify the pathogenic variant in a consanguineous Pakistani family with autosomal recessive SHFM. Peripheral blood samples were obtained, DNA was extracted, WNT10B coding and noncoding regions were PCR amplified and Sanger sequencing was performed using workflow suggested by Thermo Fisher Scientific. A novel homozygous nonsense variant (c.1098C>A; p.Cys366*) was identified in the WNT10B gene in the index patients, which probably explains SHFM type 6 in this family in comparison with similar data from the literature.
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Affiliation(s)
- Amjad Khan
- McKusick-Zhang Center for Genetic Medicine, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
- The Research Center for Medical Genomics, China Medical University, Shenyang, China
- Developmental Medicine Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard-Health Affairs (MNGHA), Riyadh, Saudi Arabia
| | - Rongrong Wang
- McKusick-Zhang Center for Genetic Medicine, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Shirui Han
- The Research Center for Medical Genomics, China Medical University, Shenyang, China
| | - Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Science, Ministry of National Guard-Health Affairs (MNGHA), Riyadh, Saudi Arabia
| | - Mohammad A. Alshabeeb
- Developmental Medicine Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard-Health Affairs (MNGHA), Riyadh, Saudi Arabia
| | - Muhammad Ansar
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Manal Alaamery
- Developmental Medicine Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard-Health Affairs (MNGHA), Riyadh, Saudi Arabia
| | - Xue Zhang
- McKusick-Zhang Center for Genetic Medicine, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
- The Research Center for Medical Genomics, China Medical University, Shenyang, China
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7
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Deng H, Zhang Y, Yao Y, Xiao H, Su B, Xu K, Guan N, Ding J, Wang F. Interpretation of Autosomal Recessive Kidney Diseases With "Presumed Homozygous" Pathogenic Variants Should Consider Technical Pitfalls. Front Pediatr 2020; 8:165. [PMID: 32363171 PMCID: PMC7180205 DOI: 10.3389/fped.2020.00165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 03/24/2020] [Indexed: 12/18/2022] Open
Abstract
Background: A false interpretation of homozygosity for pathogenic variants causing autosomal recessive disorders can lead to improper genetic counseling. The aim of this study was to demonstrate the underlying etiologies of presumed homozygous disease-causing variants harbored in six unrelated children with five different genetic renal diseases when the same variant was identified in a heterozygous state in only one of the two parents from each family using direct sequencing. Methods: Peripheral blood genomic DNA samples were extracted. Six short tandem repeats were used to verify the biological relationships between the probands and their parents. Quantitative PCR was performed to detect mutant exons with deletions. Single nucleotide polymorphism analysis and genotyping with polymorphic microsatellite markers were performed to identify uniparental disomy (UPD). Results: Each proband and his/her parents had biological relationships. Patients 2, 4, and 6 were characterized by large deletions encompassing a missense/small deletion in DGKE, NPHP1, and NPHS1, respectively. Patients 1 and 5 were caused by segmental UPD in NPHS2 and SMARCAL1, respectively. In patient 6, maternal UPD, mosaicism in paternal sperm or de novo variant in NPHP1 could not be ruled out. Conclusions: When a variant analysis report shows that a patient of non-consanguineous parents has a pathogenic presumed homozygous variant, we should remember the need to assess real homozygosity for the variant, and a segregation analysis of the variants within the parental DNAs and comprehensive molecular tests to evaluate the potential molecular etiologies, such as a point variant and an overlapping exon deletion, UPD, germline mosaicism and de novo variant, are crucial.
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Affiliation(s)
- Haiyue Deng
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yanqin Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yong Yao
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Huijie Xiao
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Baige Su
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Ke Xu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Na Guan
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Jie Ding
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Fang Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
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8
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Umair M, Hayat A. Nonsyndromic Split-Hand/Foot Malformation: Recent Classification. Mol Syndromol 2019; 10:243-254. [PMID: 32021595 DOI: 10.1159/000502784] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2019] [Indexed: 01/05/2023] Open
Abstract
Split-hand/foot malformation (SHFM) is a genetic limb anomaly disturbing the central rays of the autopod. SHFM is a genetically heterogeneous disorder with variable expressivity inherited as syndromic and nonsyndromic forms. We provide an update of the clinical and molecular aspects of nonsyndromic SHFM. This rare condition is highly complex due to the clinical variability and irregular genetic inheritance observed in the affected individuals. Nonsyndromic SHFM types have been reviewed in terms of major molecular genetic alterations reported to date. This updated overview will assist researchers, scientists, and clinicians in making an appropriate molecular diagnosis, providing an accurate recurrence risk assessment, and developing a management plan.
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Affiliation(s)
- Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), Riyadh, Saudi Arabia.,King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.,Ministry of National Guard-Health Affairs (MNGH), Riyadh, Saudi Arabia
| | - Amir Hayat
- Department of Biochemistry, Faculty of Life and Chemical Sciences, Abdul Wali Khan University, Mardan, Pakistan.,College of Medicine and Health, RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation, Exeter, UK
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9
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Al Ghamdi MA, Al-Qattan MM, Hadadi A, Alabdulrahman A, Almuzzaini B, Alatwi N, AlBalwi MA. A classification system for split-hand/ foot malformation (SHFM): A proposal based on 3 pedigrees with WNT10B mutations. Eur J Med Genet 2019; 63:103738. [PMID: 31421290 DOI: 10.1016/j.ejmg.2019.103738] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 08/11/2019] [Accepted: 08/13/2019] [Indexed: 02/06/2023]
Abstract
SHFM6 (OMIM 225300) is caused by WNT10B pathogenic variants (12q13.12). It is one of the rarest forms of SHFM; with only seven pathogenic variants described in the world literature. Furthermore, it has not been determined if SHFM6 has specific phenotypic characteristics. In this paper, we present a case series of three unrelated families with SHFM6 caused by three novel WNT10B pathogenic variants. The index patient of the first family was homozygous for the nonsense variant c.676C > T (p.Arg226*) in the WNT10B gene. The index case of the second family had a homozygous splice variant c.338-1G > C in the WNT10B gene. Finally, the index case of the third family carried two different variants in the WNT10B gene: A nonsense variant (p.Arg226*), and a missense variant (p.Gln86Pro). The latter represents the first compound heterozygous pathogenic variant related to SHFM6. We also offer a classification system for the hand/foot defects to illustrate the specific phenotypic characteristics of SHFM6. Based on this classification and a review of all previously reported cases, we demonstrate that SHFM6 caused by WNT10B pathogenic variants have the following characteristics: more severe feet defects (compared to the hand defects), polydactyly, severe flexion digital contractures, and phalangeal dysplasia.
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Affiliation(s)
- Malak A Al Ghamdi
- Department of Pediatrics, King Saud University, Riyadh, Saudi Arabia
| | | | - Ali Hadadi
- Department of Plastic and Reconstractive Surgery, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Abdulkareem Alabdulrahman
- Department of Medical Genomics Research, King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Bader Almuzzaini
- Department of Medical Genomics Research, King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Nasser Alatwi
- Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Mohammed A AlBalwi
- Department of Medical Genomics Research, King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia; Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia; College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.
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10
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A Comprehensive review of genetic skeletal disorders reported from Pakistan: A brief commentary. Meta Gene 2019. [DOI: 10.1016/j.mgene.2019.100559] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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11
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Brunelle P, Jourdain AS, Escande F, Martinovic J, Dupont J, Busa T, Moncla A, Frénois F, Stichelbout M, Manouvrier-Hanu S, Petit F. WNT10B variants in split hand/foot malformation: Report of three novel families and review of the literature. Am J Med Genet A 2019; 179:1351-1356. [PMID: 31050392 DOI: 10.1002/ajmg.a.61177] [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] [Received: 10/11/2018] [Revised: 04/11/2019] [Accepted: 04/16/2019] [Indexed: 12/12/2022]
Abstract
Split-hand/foot malformation (SHFM) is a genetically heterogeneous congenital limb malformation typically limited to a defect of the central rays of the autopod, presenting as a median cleft of hands and feet. It can be associated with long bone deficiency or included in more complex syndromes. Among the numerous genetic causes, WNT10B homozygous variants have been recently identified in consanguineous families, but remain still rarely described (SHFM6; MIM225300). We report on three novel SHFM families harboring WNT10B variants and review the literature, allowing us to highlight some clinical findings. The feet are more severely affected than the hands and there is a frequent asymmetry without obvious side-bias. Syndactyly of third-fourth fingers was a frequent finding (62%). Polydactyly, which was classically described in SHFM6, was only present in 27% of patients. No genotype-phenotype correlation is delineated but heterozygous individuals might have mild features of SHFM, suggesting a dose-effect of the WNT10B loss-of-function.
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Affiliation(s)
- Perrine Brunelle
- Clinique de Génétique Guy Fontaine, Hôpital Jeanne de Flandre, CHU Lille, Lille, France
| | - Anne-Sophie Jourdain
- Laboratoire de Biochimie et Biologie Moléculaire, Centre de Biologie Pathologie, CHU Lille, Lille, France.,EA7364-RADEME, Université de Lille, Lille, France
| | - Fabienne Escande
- Laboratoire de Biochimie et Biologie Moléculaire, Centre de Biologie Pathologie, CHU Lille, Lille, France.,EA7364-RADEME, Université de Lille, Lille, France
| | - Jelena Martinovic
- Unité de Foetopathologie, AP-HP, Hôpital Antoine Béclère, Clamart, France.,INSERM U1169, Kremlin Bicêtre, France
| | - Juliette Dupont
- Serviço de Genética Departamento da Criança e da Família, Hospital de Santa Maria, Lisbon, Portugal
| | - Tiffany Busa
- Service de Génétique Clinique, Département de Génétique, AP-HM CHU Timone Enfants, Marseille, France
| | - Anne Moncla
- Service de Génétique Clinique, Département de Génétique, AP-HM CHU Timone Enfants, Marseille, France
| | | | | | - Sylvie Manouvrier-Hanu
- Clinique de Génétique Guy Fontaine, Hôpital Jeanne de Flandre, CHU Lille, Lille, France.,EA7364-RADEME, Université de Lille, Lille, France
| | - Florence Petit
- Clinique de Génétique Guy Fontaine, Hôpital Jeanne de Flandre, CHU Lille, Lille, France.,EA7364-RADEME, Université de Lille, Lille, France
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12
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Kantaputra P, Hutsadaloi A, Kaewgahya M, Intachai W, German R, Koparal M, Leethanakul C, Tolun A, Ketudat Cairns J. WNT10B
mutations associated with isolated dental anomalies. Clin Genet 2018; 93:992-999. [DOI: 10.1111/cge.13218] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/05/2018] [Accepted: 01/18/2018] [Indexed: 12/16/2022]
Affiliation(s)
- P.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
| | | | - M. Kaewgahya
- 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
| | - W. Intachai
- 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
| | - R. German
- 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
| | - M. Koparal
- Department of Oral and Maxillofacial Surgery; Adiyaman University; Adiyaman Turkey
| | - C. Leethanakul
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry; Prince of Songkla University; Hat Yai Thailand
| | - A. Tolun
- Department of Molecular Biology and Genetics; Boğaziçi University; Istanbul Turkey
| | - J.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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13
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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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14
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Ullah A, Gul A, Umair M, Irfanullah, Ahmad F, Aziz A, Wali A, Ahmad W. Homozygous sequence variants in the WNT10B gene underlie split hand/foot malformation. Genet Mol Biol 2018; 41:1-8. [PMID: 29384555 PMCID: PMC5901503 DOI: 10.1590/1678-4685-gmb-2016-0162] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 04/10/2017] [Indexed: 11/22/2022] Open
Abstract
Split-hand/split-foot malformation (SHFM), also known as ectrodactyly is a rare genetic disorder. It is a clinically and genetically heterogeneous group of limb malformations characterized by absence/hypoplasia and/or median cleft of hands and/or feet. To date, seven genes underlying SHFM have been identified. This study described four consanguineous families (A-D) segregating SHFM in an autosomal recessive manner. Linkage in the families was established to chromosome 12p11.1-q13.13 harboring WNT10B gene. Sequence analysis identified a novel homozygous nonsense variant (p.Gln154*) in exon 4 of the WNT10B gene in two families (A and B). In the other two families (C and D), a previously reported variant (c.300_306dupAGGGCGG; p.Leu103Argfs*53) was detected. This study further expands the spectrum of the sequence variants reported in the WNT10B gene, which result in the split hand/foot malformation.
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Affiliation(s)
- Asmat Ullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Ajab Gul
- Department of Biotechnology and Informatics, BUITEMS, Quetta, Pakistan
| | - Muhammad Umair
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Irfanullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Farooq Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Abdul Aziz
- Department of Computer Sciences and Bioinformatics, Khushal Khan Khattak University, Karak, Pakistan
| | - Abdul Wali
- Department of Biotechnology and Informatics, BUITEMS, Quetta, Pakistan
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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15
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Ullah A, Hammid A, Umair M, Ahmad W. A Novel Heterozygous Intragenic Sequence Variant in DLX6 Probably Underlies First Case of Autosomal Dominant Split-Hand/Foot Malformation Type 1. Mol Syndromol 2016; 8:79-84. [PMID: 28611547 DOI: 10.1159/000453350] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2016] [Indexed: 11/19/2022] Open
Abstract
Split-hand and foot malformation (SHFM; MIM 183600) is a rare human genetic limb malformation. It is characterized by missing digital rays in the hands and feet. SHFMs vary in severity from mild abnormalities affecting a single limb to acute malformations involving all 4 limbs. It is inherited, as part of both a syndromic and nonsyndromic disorder, in an autosomal recessive, autosomal dominant, and X-linked patterns. So far, 9 loci of hand and foot malformation have been mapped on human chromosomes. The present study describes a family with 2 affected individuals segregating SHFM in an autosomal dominant fashion. Sanger sequencing of the genes involved in SHFM was performed to identify the disease-causing variant. Sequence analysis revealed the first heterozygous missense variant (c.632T>A, p.Val211Glu) in the distal-less homeobox 6 (DLX6) gene, located in chromosome 7q21, causing SHFM in the present family. This study supports the evidence of DLX6 as an SHFM-causing gene.
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Affiliation(s)
- Asmat Ullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Anam Hammid
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Muhammad Umair
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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16
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Conte D, Garaffo G, Lo Iacono N, Mantero S, Piccolo S, Cordenonsi M, Perez-Morga D, Orecchia V, Poli V, Merlo GR. The apical ectodermal ridge of the mouse model of ectrodactyly Dlx5;Dlx6-/- shows altered stratification and cell polarity, which are restored by exogenous Wnt5a ligand. Hum Mol Genet 2015; 25:740-54. [PMID: 26685160 PMCID: PMC4743692 DOI: 10.1093/hmg/ddv514] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 12/10/2015] [Indexed: 02/06/2023] Open
Abstract
The congenital malformation split hand/foot (SHFM) is characterized by missing central fingers and dysmorphology or fusion of the remaining ones. Type-1 SHFM is linked to deletions/rearrangements of the DLX5–DLX6 locus and point mutations in the DLX5 gene. The ectrodactyly phenotype is reproduced in mice by the double knockout (DKO) of Dlx5 and Dlx6. During limb development, the apical ectodermal ridge (AER) is a key-signaling center responsible for early proximal–distal growth and patterning. In Dlx5;6 DKO hindlimbs, the central wedge of the AER loses multilayered organization and shows down-regulation of FGF8 and Dlx2. In search for the mechanism, we examined the non-canonical Wnt signaling, considering that Dwnt-5 is a target of distalless in Drosophila and the knockout of Wnt5, Ryk, Ror2 and Vangl2 in the mouse causes severe limb malformations. We found that in Dlx5;6 DKO limbs, the AER expresses lower levels of Wnt5a, shows scattered β-catenin responsive cells and altered basolateral and planar cell polarity (PCP). The addition of Wnt5a to cultured embryonic limbs restored the expression of AER markers and its stratification. Conversely, the inhibition of the PCP molecule c-jun N-terminal kinase caused a loss of AER marker expression. In vitro, the addition of Wnt5a on mixed primary cultures of embryonic ectoderm and mesenchyme was able to confer re-polarization. We conclude that the Dlx-related ectrodactyly defect is associated with the loss of basoapical and PCP, due to reduced Wnt5a expression and that the restoration of the Wnt5a level is sufficient to partially reverts AER misorganization and dysmorphology.
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Affiliation(s)
- Daniele Conte
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Giulia Garaffo
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Nadia Lo Iacono
- Human Genome Department, Istituto Tecnologie Biomediche, CNR Milano, Italy
| | - Stefano Mantero
- Human Genome Department, Istituto Tecnologie Biomediche, CNR Milano, Italy
| | - Stefano Piccolo
- Department of Molecular Medicine, University of Padova, Padova, Italy and
| | | | - David Perez-Morga
- Laboratoire de Parasitologie Moléculaire, IBMM-DBM, Université Libre de Bruxelles, B-6041 Gosselies, Belgium
| | - Valeria Orecchia
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Valeria Poli
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Giorgio R Merlo
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy,
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17
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Sp6 and Sp8 transcription factors control AER formation and dorsal-ventral patterning in limb development. PLoS Genet 2014; 10:e1004468. [PMID: 25166858 PMCID: PMC4148220 DOI: 10.1371/journal.pgen.1004468] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 05/14/2014] [Indexed: 12/27/2022] Open
Abstract
The formation and maintenance of the apical ectodermal ridge (AER) is critical for the outgrowth and patterning of the vertebrate limb. The induction of the AER is a complex process that relies on integrated interactions among the Fgf, Wnt, and Bmp signaling pathways that operate within the ectoderm and between the ectoderm and the mesoderm of the early limb bud. The transcription factors Sp6 and Sp8 are expressed in the limb ectoderm and AER during limb development. Sp6 mutant mice display a mild syndactyly phenotype while Sp8 mutants exhibit severe limb truncations. Both mutants show defects in AER maturation and in dorsal-ventral patterning. To gain further insights into the role Sp6 and Sp8 play in limb development, we have produced mice lacking both Sp6 and Sp8 activity in the limb ectoderm. Remarkably, the elimination or significant reduction in Sp6;Sp8 gene dosage leads to tetra-amelia; initial budding occurs, but neither Fgf8 nor En1 are activated. Mutants bearing a single functional allele of Sp8 (Sp6−/−;Sp8+/−) exhibit a split-hand/foot malformation phenotype with double dorsal digit tips probably due to an irregular and immature AER that is not maintained in the center of the bud and on the abnormal expansion of Wnt7a expression to the ventral ectoderm. Our data are compatible with Sp6 and Sp8 working together and in a dose-dependent manner as indispensable mediators of Wnt/βcatenin and Bmp signaling in the limb ectoderm. We suggest that the function of these factors links proximal-distal and dorsal-ventral patterning. In this report we examined the functional roles of Sp6 and Sp8 during limb development using compound loss-of-function mutants. Sp6 and Sp8, two members of the Sp gene family, are expressed in the limb bud ectoderm and function downstream of WNT/βcatenin signaling for Fgf8 induction. The analysis of the allelic series shows that the progressive reduction in the dose of Sp6 and Sp8 gene products leads to predictable morphology, from syndactyly, to split hand/foot malformation, oligodactyly, truncation and finally amelia, indicating that these two factors act in a complementary manner. The molecular characterization of the mutant limbs reveal that Sp6/Sp8 are required in a dose-dependent manner for Fgf8 and En1 induction, thereby placing them as an important link between the induction of the AER and the establishment of dorsal-ventral patterning during limb development.
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18
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Restelli M, Lopardo T, Lo Iacono N, Garaffo G, Conte D, Rustighi A, Napoli M, Del Sal G, Perez-Morga D, Costanzo A, Merlo GR, Guerrini L. DLX5, FGF8 and the Pin1 isomerase control ΔNp63α protein stability during limb development: a regulatory loop at the basis of the SHFM and EEC congenital malformations. Hum Mol Genet 2014; 23:3830-42. [PMID: 24569166 PMCID: PMC4065156 DOI: 10.1093/hmg/ddu096] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Ectrodactyly, or Split-Hand/Foot Malformation (SHFM), is a congenital condition characterized by the loss of central rays of hands and feet. The p63 and the DLX5;DLX6 transcription factors, expressed in the embryonic limb buds and ectoderm, are disease genes for these conditions. Mutations of p63 also cause the ectodermal dysplasia–ectrodactyly–cleft lip/palate (EEC) syndrome, comprising SHFM. Ectrodactyly is linked to defects of the apical ectodermal ridge (AER) of the developing limb buds. FGF8 is the key signaling molecule in this process, able to direct proximo-distal growth and patterning of the skeletal primordial of the limbs. In the limb buds of both p63 and Dlx5;Dlx6 murine models of SHFM, the AER is poorly stratified and FGF8 expression is severely reduced. We show here that the FGF8 locus is a downstream target of DLX5 and that FGF8 counteracts Pin1–ΔNp63α interaction. In vivo, lack of Pin1 leads to accumulation of the p63 protein in the embryonic limbs and ectoderm. We show also that ΔNp63α protein stability is negatively regulated by the interaction with the prolyl-isomerase Pin1, via proteasome-mediated degradation; p63 mutant proteins associated with SHFM or EEC syndromes are resistant to Pin1 action. Thus, DLX5, p63, Pin1 and FGF8 participate to the same time- and location-restricted regulatory loop essential for AER stratification, hence for normal patterning and skeletal morphogenesis of the limb buds. These results shed new light on the molecular mechanisms at the basis of the SHFM and EEC limb malformations.
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Affiliation(s)
- Michela Restelli
- Department of Biosciences, University of Milano, Milano I-20133, Italy
| | - Teresa Lopardo
- Department of Biosciences, University of Milano, Milano I-20133, Italy
| | - Nadia Lo Iacono
- Department of Biosciences, University of Milano, Milano I-20133, Italy
| | - Giulia Garaffo
- Telethon Laboratory, Department of Molecular Biotechnologies and Health Sciences, University of Torino, Torino I-10126, Italy
| | - Daniele Conte
- Telethon Laboratory, Department of Molecular Biotechnologies and Health Sciences, University of Torino, Torino I-10126, Italy
| | | | - Marco Napoli
- Department of Biochemistry and Molecular Biology, Center for Genetics & Genomics, and Center for Stem Cell & Developmental Biology, MD Anderson, Houston, TX, USA
| | - Giannino Del Sal
- Molecular Oncology Unit, LNCIB Area Science Park, Trieste I-34149, Italy
| | - David Perez-Morga
- Laboratoire de Parasitologie Moléculaire, IBMM-DBM, Université Libre de Bruxelles, Gosselies B-6041, Belgium and
| | - Antonio Costanzo
- Department of Dermatology, University of Rome 'Tor Vergata', Rome I-00133, Italy
| | - Giorgio Roberto Merlo
- Telethon Laboratory, Department of Molecular Biotechnologies and Health Sciences, University of Torino, Torino I-10126, Italy
| | - Luisa Guerrini
- Department of Biosciences, University of Milano, Milano I-20133, Italy
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