RESUMO
The gene CDH11 encodes cadherin-11, a Type II cadherin superfamily member that contains five extracellular cadherin (EC) domains. Cadherin-11 undergoes trans-dimerization via the EC1 domain to generate cadherin complexes. Compound heterozygous and homozygous loss-of-function CDH11 variants are observed in Elsahy-Waters syndrome (EWS), which shows characteristic craniofacial features, vertebral abnormalities, cutaneous syndactyly in 2-3 digits, genitourinary anomalies, and intellectual disability. Heterozygous CDH11 variants can cause Teebi hypertelorism syndrome (THS), which features widely spaced eyes and hypospadias. We report a THS patient with a novel CDH11 variant involving the EC1 domain. The patient was a 10-month-old male with normal developmental milestones, but had widely spaced eyes, strabismus, hypospadias, shawl scrotum, broad thumbs (right bifid thumb in x-ray), polysyndactyly of the left fourth finger, and cutaneous syndactyly of left third/fourth fingers. Exome sequencing identified a de novo heterozygous CDH11 variant (NM_001797.4:c.229C > T [p.Leu77Phe] NC_000016.9:g.64998856G > A). Clinical features were consistent with previously reported THS patients, but polysyndactyly, broad thumb, and cutaneous syndactyly overlapped phenotypic features of EWS. THS and EWS may represent a spectrum of CDH11-related disorders. Residue Leu77 in this novel CDH11 variant lines a large hydrophobic pocket where side chains of the partner cadherin-11 insert to trans-dimerize, suggesting that the cadherin-11 structure might be altered in this variant.
Assuntos
Anormalidades Múltiplas , Hipertelorismo , Hipospadia , Sindactilia , Humanos , Masculino , Lactente , Anormalidades Múltiplas/diagnóstico , Anormalidades Múltiplas/genética , Japão , Hipertelorismo/genética , Caderinas/genética , Sindactilia/diagnóstico , Sindactilia/genéticaRESUMO
Synpolydactyly 1, also called syndactyly type II (SDTY2), is a genetic limb malformation characterized by polydactyly with syndactyly involving the webbing of the third and fourth fingers, and the fourth and fifth toes. It is caused by heterozygous alterations in HOXD13 with incomplete penetrance and phenotypic variability. In our study, a five-generation family with an SPD phenotype was enrolled in our Rare Disease Genomics Protocol. A comprehensive examination of three generations using Illumina short-read whole-genome sequencing (WGS) did not identify any causative variants. Subsequent WGS using Pacific Biosciences (PacBio) long-read HiFi Circular Consensus Sequencing (CCS) revealed a heterozygous 27-bp duplication in the polyalanine tract of HOXD13. Sanger sequencing of all available family members confirmed that the variant segregates with affected individuals. Reanalysis of an unrelated family with a similar SPD phenotype uncovered a 21-bp (7-alanine) duplication in the same region of HOXD13. Although ExpansionHunter identified these events in most individuals in a retrospective analysis, low sequence coverage due to high GC content in the HOXD13 polyalanine tract makes detection of these events challenging. Our findings highlight the value of long-read WGS in elucidating the molecular etiology of congenital limb malformation disorders.
Assuntos
Proteínas de Homeodomínio , Sindactilia , Fatores de Transcrição , Proteínas de Homeodomínio/genética , Humanos , Linhagem , Estudos Retrospectivos , Sindactilia/genética , Fatores de Transcrição/genética , Sequenciamento Completo do GenomaRESUMO
Polydactyly is a limb malformation and can occur as nonsyndromic polydactyly, syndromic polydactyly, or along with other limb defects. A few genes have been identified that cause various forms of syndromic and nonsyndromic polydactyly, of which GLI3 has been extensively explored. In the present study, GLI3 gene was screened by direct resequencing in 15 polydactyly cases with or without other anomalies. GLI3 screening revealed two novel pathogenic variants, NM_000168.6:c.3414delC [p.(H1138Qfs*68)] and NM_000168.6:c.1862C>T [p.(P621L)], found in two unrelated cases of familial complex pre- and postaxial polysyndactyly and sporadic Greig cephalopolysyndactyly syndrome (GCPS), respectively. The first pathogenic GLI3 variant, NM_000168.6:c.3414delC, causes premature protein truncation at the C-terminal domain of GLI3. Alternatively, the second pathogenic variant, NM_000168.6:c.1862C>T, lies in the DNA binding domain of GLI3 protein and may affect its hydrophobic interaction with DNA. Both pathogenic GLI3 variants had reduced transcriptional activity in HEK293 cells that likely had led to haploinsufficiency and, consequently, the clinical phenotypes. Overall, the present study reports a novel familial case of complex pre- and postaxial polysyndactyly and the underlying novel pathogenic GLI3 variant expanding the clinical criteria for GLI3 mutational spectrum to complex pre- and postaxial polysyndactyly. Furthermore, this study also reports a novel GLI3 pathogenic variant linked to GCPS, highlighting the known genotype-phenotype correlation.
Assuntos
Acrocefalossindactilia/genética , Predisposição Genética para Doença , Proteínas do Tecido Nervoso/genética , Sindactilia/genética , Proteína Gli3 com Dedos de Zinco/genética , Acrocefalossindactilia/diagnóstico , Acrocefalossindactilia/patologia , Adolescente , Criança , Feminino , Estudos de Associação Genética , Humanos , Masculino , Mutação/genética , Fenótipo , Polimorfismo de Nucleotídeo Único , Sindactilia/diagnóstico , Sindactilia/patologia , Adulto JovemRESUMO
Carpenter syndrome (acrocephalopolysyndactyly type II) is a rare autosomal recessive disorder. It was clinically diagnosed in a female baby with polysyndactyly and craniosynostosis in a referral clinic in Northern Tanzania. In the RAB23 gene, a previously described homozygous variant c.82C>T p.(Arg28*) was detected that results in a premature stop codon. Both parents were demonstrated to be heterozygous carriers of this variant. Herewith, its pathogenicity is proved. A literature search suggests this is the first molecularly confirmed case of Carpenter syndrome in continental Africa.
Assuntos
Anormalidades Múltiplas/genética , Acrocefalossindactilia/genética , Códon sem Sentido , Mutação Puntual , Proteínas rab de Ligação ao GTP/genética , Anormalidades Múltiplas/epidemiologia , Acrocefalossindactilia/diagnóstico por imagem , Acrocefalossindactilia/epidemiologia , Feminino , Deformidades Congênitas do Pé/diagnóstico por imagem , Deformidades Congênitas do Pé/genética , Deformidades Congênitas da Mão/diagnóstico por imagem , Deformidades Congênitas da Mão/genética , Homozigoto , Humanos , Processamento de Imagem Assistida por Computador , Lactente , Masculino , Fenótipo , Exame Físico , Tanzânia/epidemiologia , Tomografia Computadorizada por Raios X , Proteínas rab de Ligação ao GTP/deficiênciaRESUMO
BACKGROUND: Carbohydrate sulfotransferase 11 (CHST11) is a membrane protein of Golgi that catalyses the transfer of sulfate to position 4 of the N-acetylgalactosamine residues of chondroitin. Chondroitin sulfate is the predominant proteoglycan in cartilage, and its sulfation is important in the developing growth plate of cartilage. A homozygous deletion encompassing part of the gene and the embedded miRNA MIR3922 had been detected in a woman with hand/foot malformation and malignant lymphoproliferative disease. Chst11-deficient mouse has severe chondrodysplasia, congenital arthritis and neonatal lethality. We searched for the causative variant for the unusual combination of limb malformations with variable expressivity accompanied by skeletal defects in a consanguineous Pakistani kindred. METHODS: We performed detailed clinical investigations in family members. Homozygosity mapping using SNP genotype data was performed to map the disease locus and exome sequencing to identify the underlying molecular defect. RESULTS: The limb malformations include brachydactyly, overriding digits and clino-symphalangism in hands and feet and syndactyly and hexadactyly in feet. Skeletal defects include scoliosis, dislocated patellae and fibulae and pectus excavatum. The disease locus is mapped to a 1.6 Mb region at 12q23, harbouring a homozygous in-frame deletion of 15 nucleotides in CHST11. Novel variant c.467_481del (p.L156_N160del) is deduced to lead to the deletion of five evolutionarily highly conserved amino acids and predicted as damaging to protein by in silico analysis. Our findings confirm the crucial role of CHST11 in skeletal morphogenesis and show that CHST11 defects have variable manifestations that include a variety of limb malformations and skeletal defects.
Assuntos
Braquidactilia/genética , Condrodisplasia Punctata/genética , Deformidades Congênitas do Pé/genética , Sulfotransferases/genética , Sindactilia/genética , Adulto , Animais , Braquidactilia/fisiopatologia , Pré-Escolar , Condrodisplasia Punctata/fisiopatologia , Feminino , Pé , Deformidades Congênitas do Pé/fisiopatologia , Lâmina de Crescimento/crescimento & desenvolvimento , Lâmina de Crescimento/fisiologia , Mãos , Homozigoto , Humanos , Masculino , Camundongos , Pessoa de Meia-Idade , Mutação , Linhagem , Deleção de Sequência , Sindactilia/fisiopatologia , Adulto JovemRESUMO
We report on a young girl with polysyndactyly, coarctation of the aorta, and tongue hamartomas. These features are similar to those reported in individuals with variant forms of orofaciodigital syndrome known as congenital heart defects, hamartomas of the tongue and polysyndactly (CHDHTP: OMIM 217085) [Örstavik et al., 1992] and orocardiodigital syndrome [Digilio et al., 1996]. Whole exome sequencing revealed that she is a compound heterozygote for a frame shift mutation and a likely pathogenic sequence variant in WDPCP, a gene that regulates planar cell polarity and ciliogenesis. Results of genotyping in her parents and unaffected siblings were consistent with autosomal recessive inheritance of the mutation and the WDPCP variant. These results suggest that disruption of planar cell polarity and ciliogenesis may result in this unusual form of orofaciodigital syndrome.
Assuntos
Coartação Aórtica/genética , Mutação da Fase de Leitura , Hamartoma/genética , Heterozigoto , Sindactilia/genética , Neoplasias da Língua/genética , Substituição de Aminoácidos , Coartação Aórtica/diagnóstico , Biópsia , Pré-Escolar , Análise Mutacional de DNA , Fácies , Feminino , Genes Recessivos , Estudos de Associação Genética , Hamartoma/diagnóstico , Humanos , Lactente , Linhagem , Fenótipo , Sítios de Splice de RNA , Radiografia , Sindactilia/diagnóstico , Sindactilia/diagnóstico por imagem , Neoplasias da Língua/diagnósticoRESUMO
PURPOSE: To describe a modified classification that includes both complicated ulnar polydactyly and ulnar polydactyly with bifid or duplicated proximal phalanx and to apply it to a clinical series. METHODS: A total of 42 patients with ulnar polydactyly were admitted to our outpatient clinic between January 2004 and January 2014 and were included in the study. Patients' clinical and radiological data were evaluated retrospectively and organized into 5 different subgroups. RESULTS: There were 20 bilateral and 22 unilateral patients with polydactyly. These were composed of 32 supernumerary digits represented as type I, 7 as type II, 9 as type III, 12 as type IV, and 2 as type V. Nine patients had bifid or duplicated proximal phalanges (types IIIA and IIIB) and 2 were of the complicated type (type V). We identified 5 types based on morphology, level of duplication, and other complicating features. CONCLUSIONS: Complicated ulnar polydactyly and ulnar polydactyly with bifid proximal phalanx are 2 important types of ulnar polydactyly with surgical implications, both separately included in the Pritsch classification system and Rayan and Al-Qattan classification systems. None of the current classification systems include both types. We believe our modified classification system will help to better define diagnosis and treatment plans for bifid proximal phalanx and complicated type ulnar polydactyly. TYPE OF STUDY/LEVEL OF EVIDENCE: Diagnostic III.
Assuntos
Polidactilia/classificação , Ulna/anormalidades , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Polidactilia/diagnóstico por imagem , Radiografia , Estudos Retrospectivos , Ulna/diagnóstico por imagemRESUMO
In toe desyndactyly, a dorsal or plantar commissural flap, combined with skin grafts, will ensure an acceptable result. However, the parallel unsightly scars in the longitudinal direction on the dorsum of the toes will sometimes fail to satisfy the patient's and/or the parents' aesthetic expectations. To address this issue, we developed a technique using a transversely oriented transposition flap for web reconstruction, which can spare the dorsal interdigital skin maximally to shift the dorsal scars plantarly such that they become inconspicuous. The design of the flap is simple and uncomplicated surgically. Moreover, the donor site morbidity is minimal, owing to the good healing potential of the transverse scars. This technique could be an alternative in web reconstruction of toe desyndactyly, especially in cases with high cosmetic priority.
Assuntos
Retalhos Cirúrgicos , Sindactilia/cirurgia , Dedos do Pé/anormalidades , Dedos do Pé/cirurgia , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Procedimentos de Cirurgia Plástica , Transplante de PeleRESUMO
Carpenter syndrome is an autosomal recessive disorder comprising craniosynostosis, polysyndactyly, and brachydactyly. It occurs in approximately 1 birth per million. We present a patient with Carpenter syndrome (confirmed by molecular diagnosis) who has several unique and previously unreported manifestations including a large ovarian cyst and heterotaxy with malrotation of stomach, intestine, and liver. These findings were first noted by prenatal ultrasound and may assist in prenatally diagnosing additional cases of Carpenter syndrome.
Assuntos
Acrocefalossindactilia/diagnóstico , Diagnóstico Pré-Natal , Adulto , Craniossinostoses , Feminino , Humanos , Fenótipo , Gravidez , Sindactilia , Ultrassonografia Pré-NatalRESUMO
Laurin-Sandrow syndrome (LSS) is an extremely rare syndrome of mirror hand and leg with less than 20 cases reported in literature. The syndrome has been attributed to a mutation in the MIPOL-1 (mirror-image polydactyly) gene located on locus 14q13.3-q21 coding for CCDC193 (coiled-coli domain containing 193) protein. It is characterised by limb, facial and central nervous system anomalies with the most constant being fibular dimelia with fibular ray duplication, polydactyly with secondary deformities of fixed equinus, knee joint instability and flexion deformity. It is associated less frequently with ulnar dimelia, thumb aplasia/hypoplasia, ulnar ray duplication, symbrachypolydactyly, 'rosette' hands, facial dysmorphism like hypertelorism, broad columella and flat nose, CNS anomalies like aplasia/hypoplasia of corpus callosum, hydrocephalus and muscular dystonia. We report a 2-year-old male child with LSS and perform a literature review to expound on this rare syndrome. Level of Evidence: Level V (Therapeutic).
Assuntos
Anormalidades Múltiplas , Ectromelia , Deformidades Congênitas do Pé , Deformidades Congênitas da Mão , Anormalidades Múltiplas/genética , Criança , Pré-Escolar , Deformidades Congênitas do Pé/genética , Humanos , Masculino , Nariz/anormalidades , SíndromeRESUMO
BACKGROUND: In postaxial polysyndactyly of the foot, the choice of which toe to excise is controversial. It is often treated by resection of the fifth toe to save the lateral neurovascular bundles of the sixth toe. However, the sixth toe is often short and laterally deviated, which may require wedge osteotomy, potentially shortening the phalanx and compromising circulation. This study outlines an individualized method to spare the length and axis of the fifth toe in polysyndactyly with a short and deviated sixth toe. METHODS: We retrospectively analyzed 38 patients who underwent surgery between 2006 and 2019. The fifth toe was spared in 18 cases, and the sixth toe in 20 cases. The ratios of the forefoot width, angle difference, and toe length were compared between the affected and unaffected sides postoperatively. Complications and subjective judgments on cosmetic results were recorded and compared. RESULTS: No significant between-group differences were observed for sex, age at surgery, or the follow-up period. The forefoot width ratio did not significantly differ between the groups. However, the angle difference and toe length ratios showed significantly better results in the fifth toe-spared group than in the sixth toe-spared group (P<0.05 and P<0.01, respectively). There were no cases of impaired circulation, and subjective evaluations revealed satisfactory results in the fifth toe-spared group. CONCLUSIONS: In cases with short and deviated sixth toes, sparing the fifth toe is an effective method of cosmetic treatment. The surgical results were satisfactory, with an improved appearance and no residual deformities.
RESUMO
BACKGROUND: We aimed to report surgical outcomes and analyze prognostic factors of medial toe excision for polysyndactyly of the fifth toe. METHODS: We reviewed the details of 139 consecutive patients who underwent surgery for postaxial polydactyly of the foot from 2009 to 2018. Among these, 83 patients (90 feet) with polysyndactyly of the fifth toe, treated by medial toe excision (between the duplicated toes) and reconstruction of the fourth web space using a dorsal rectangular flap, were included. The toe alignment and stability were restored by chondroplasty and soft tissue balancing without an osteotomy. A full-thickness skin graft was performed in 52 feet. The mean age at surgery was 27.1 ± 17.5 months and the mean duration of follow-up was 42.8 ± 24.9 months. RESULTS: At the last follow-up, a relatively small size of the reconstructed toe was observed in 19 feet (19/90, 21.1%). Proximal duplication level (metatarsal or proximal phalanx type) and preoperative hypoplasia of the remaining toe were related to the small postoperative size. Valgus deformity of the remaining toe was observed in 2 feet (2/90, 2.2%). We observed 17 cases with delayed healing or early postoperative wound infection. Among these, 7 cases (7/90, 7.8%) showed postoperative thickening or advancement of the web, which was not observed in cases without wound problems. No cases had functional disturbance or pain. CONCLUSION: The overall surgical outcomes were satisfactory without an osteotomy. Patients with a proximal duplication level or preoperative hypoplasia of the remaining toe should be informed of its possible small size postoperatively. LEVELS OF EVIDENCE: Level IV, retrospective case series.
Assuntos
Ossos do Metatarso , Sindactilia , Humanos , Estudos Retrospectivos , Dedos do Pé/cirurgia , Resultado do TratamentoRESUMO
Circumcisions are among the most commonly performed procedures in the pediatric population, but the value of the preputial skin often goes unrecognized as a potential graft (Ehrlichman et al., 2018). We highlight three patients who underwent coordinated circumcision and use of the excised preputial skin as a graft for syndactyly repair. Syndactyly, a condition where fingers are fused together, is often repaired utilizing skin from the groin region, which can result in unwanted hair growth and subcutaneous fat growth. The utilization of the prepuce is a convenient alternative that may have fewer undesirable qualities.
Assuntos
Circuncisão Masculina , Sindactilia , Criança , Prepúcio do Pênis/cirurgia , Humanos , Masculino , Sindactilia/cirurgiaRESUMO
BACKGROUND: Polysyndactyly (PSD) is an autosomal dominant genetic limb malformation caused by mutations. METHODS: Whole exome sequencing and Sanger sequencing were used to determine the mutations in PSD patients. Luciferase reporter assay was performed to determine the effect of GLI3 mutation on its transcriptional activity. RESULTS: In this study, we investigated the gene mutations of three affected individuals across three generations. The frameshift mutations of GLI3 (NM_000168:c.4659del, NP_000159.3: p.Ser1553del), ANKUB1 (NM_001144960:c.1385del, NP_001138432.1: p.Pro462del), and TAS2R3 (NM_016943:c.128_131del, NP_058639.1: p.Leu43del) were identified in the three affected individuals, but not in three unaffected members by whole exome sequencing and sanger sequencing. Luciferase reporter assay demonstrated that GLI3 mutation reduced the transcriptional activity of GLI3. The results from SMART analysis showed that the frameshift mutation of TAS2R3 altered most protein sequence, which probably destroyed protein function. Although the frameshift mutation of ANKUB1 did not locate in ankyrin repeat domain and ubiquitin domain, it might influence the interaction between ANKUB1 and other proteins, and further affected the ubiquitinylation. CONCLUSION: These results indicated that the frameshift mutations of GLI3, ANKUB1, and TAS2R3 might alter the functions of these proteins, and accelerated PSD progression.
Assuntos
Mutação da Fase de Leitura , Proteínas do Tecido Nervoso/genética , Receptores Acoplados a Proteínas G/genética , Sindactilia/genética , Proteína Gli3 com Dedos de Zinco/genética , Adulto , Feminino , Células HEK293 , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Proteínas do Tecido Nervoso/metabolismo , Linhagem , Receptores Acoplados a Proteínas G/metabolismo , Sindactilia/patologia , Proteína Gli3 com Dedos de Zinco/metabolismoRESUMO
BACKGROUND: Triphalangeal thumb-polysyndactyly syndrome (TPT-PS) is a rare well-defined autosomal dominant disorder characterized by long thumbs with three phalanges combined with pre- and postaxial polydactyly/syndactyly of limbs. By now, the syndrome has been reported in several large families from different ethnic backgrounds, with a high degree of inter- and intrafamilial variability. The genome locus responsible for TPT-PS has been mapped to the 7q36.3 region harboring a long-range sonic hedgehog (SHH) regulatory sequence (ZRS). Both single-nucleotide variants and complete duplications of ZRS were shown to cause TPT-PS and similar limb phenotypes. TPT-PS usually forms as isolated limb pathology not associated with additional malformations, in particular, with cardiovascular abnormalities. CASE PRESENTATION: Here we report on a rare Russian neonatal case of TPT-PS combined with severe congenital heart disease, namely double outlet right ventricle, and microphthalmia with optic disc coloboma. Pedigree analysis revealed TPT-PS of various expressivity in 10 family members throughout five generations, while the cardiac defect and the eye pathology were detected only in the proband. To extend the knowledge on genotype-phenotype spectrum of TPT-PS, the careful clinical and genomic analysis of the family was performed. High-resolution array-based comparative genomic hybridization (array-CGH) revealed a ~ 300 kb microduplication of 7q36.3 locus (arr[GRCh37] 7q36.3(156385810_156684811) × 3) that co-segregated with TPT-PS in the proband and her mother. The duplication encompassed three genes including LMBR1, the intron 5 of which is known to harbor ZRS. Based on whole-exome sequencing data, no additional pathogenic mutations or variants of uncertain clinical significance were found in morbid cardiac genes or genes associated with a microphthalmia/anophthalmia/coloboma spectrum of ocular malformations. CONCLUSIONS: The results support the previous data, indicating that complete ZRS duplication underlies TPT-PS, and suggest a broader phenotypic impact of the 7q36.3 microduplication. Potential involvement of the 7q36.3 microduplication in the patient's cardiac and eye malformations is discussed. However, the contribution of some additional genetic/epigenetic factors to the complex patient`s phenotype cannot be excluded entirely. Further comprehensive functional studies are needed to prove the possible involvement of the 7q36.3 locus in congenital heart disease and eye pathology.
Assuntos
Anormalidades Múltiplas/genética , Cromossomos Humanos Par 7/genética , Coloboma/genética , Anormalidades Congênitas/genética , Dupla Via de Saída do Ventrículo Direito/genética , Duplicação Gênica , Disostose Mandibulofacial/genética , Microftalmia/genética , Disco Óptico/anormalidades , Adulto , Cromossomos Humanos Par 7/ultraestrutura , Hibridização Genômica Comparativa , Feminino , Humanos , Lactente , Masculino , Proteínas de Membrana/genética , Linhagem , Fenótipo , Polimorfismo de Nucleotídeo Único , Síndrome , Artérias Umbilicais/anormalidadesRESUMO
Syndactyly is one of the most frequent hereditary limb malformations with clinical and genetical complexity. Autosomal dominant syndactyly type IV (SD4) is a rare form of syndactyly, caused by heterozygous mutations in a sonic hedgehog (SHH) regulatory element (ZRS) which resides in intron 5 of the LMBR1 gene on chromosome 7q36.3. SD4 is characterized by complete cutaneous syndactyly of the fingers, accompanied by cup-shaped hands due to flexion of the fingers and polydactyly. Here, for the first time, we reported a large Chinese family from Fujian province, manifesting cup-shaped hands consistent with SD4 and intrafamilial heterogeneity in clinical phenotype of tibial and fibulal shortening, triphalangeal thumb-polysyndactyly syndrome (TPTPS). We identified a novel duplication of â¼222 kb covering exons 2-17 of the LMBR1 gene in this family by sub-exome target sequencing. This case expands our new clinical understanding of SD4 phenotype and again confirms the feasibility to detect copy number variation by sub-exome target sequencing.
RESUMO
BACKGROUND: Preaxial polydactyly type IV, also referred as polysyndactyly, has been described in a few syndromes. We present three generations of a family with preaxial polydactyly type IV and other clinical features of Greig cephalopolysyndactyly syndrome (GCPS). METHODS AND RESULTS: Sequencing analysis of the GLI3 coding region identified a novel donor splice site variant NC_000007.14(NM_000168.6):c.473+3A>T in the proband and the same pathogenic variant was subsequently identified in other affected family members. Functional analysis based on Sanger sequencing of the proband's complementary DNA (cDNA) sample revealed that the splice site variant c.473+3A>T disrupts the original donor splice site, thus leading to exon 4 skipping. Based on further in silico analysis, this pathogenic splice site variant consequently results in a truncated protein NP_000159.3:p.(His123Argfs*57), which lacks almost all functionally important domains. Therefore, functional cDNA analysis confirmed that the haploinsufficiency of the GLI3 is the cause of GCPS in the affected family members. CONCLUSION: Despite the evidence provided, pathogenic variants in the GLI3 do not always definitely correlate with syndromic or nonsyndromic clinical phenotypes associated with this gene. For this reason, further transcriptomic and proteomic evaluation could be suggested.
Assuntos
Acrocefalossindactilia/genética , Predisposição Genética para Doença/genética , Proteínas do Tecido Nervoso/genética , Proteína Gli3 com Dedos de Zinco/genética , Acrocefalossindactilia/diagnóstico por imagem , Acrocefalossindactilia/fisiopatologia , Criança , DNA Complementar , Feminino , Humanos , Pessoa de Meia-Idade , Mutação , Proteínas do Tecido Nervoso/metabolismo , Linhagem , Fenótipo , Proteômica , Análise de Sequência de DNA , Transcriptoma , Proteína Gli3 com Dedos de Zinco/metabolismoRESUMO
RESUMEN La polisindactilia es un defecto congénito que tiene lugar en las manos o en los pies, o en ambos al mismo tiempo y que consiste en la existencia de múltiples dedos supernumerarios además de la fusión de tejido blando y/o óseo entre dedos adyacentes, generando la ausencia total o parcial del espacio entre dos dedos. Se presenta el caso de una paciente femenina de 35 años de edad. No presenta ningún antecedente patológico personal de interés, ni alergias medicamentosas conocidas. Presenta una sindactilia compleja en el dedo pulgar de la mano derecha, con polidactilia preaxil, acompañado de disminución de la movilidad en las articulaciones de este dedo. Esta paciente voluntariamente y con consentimiento informado forma parte del proyecto de investigación "Defectos congénitos del esqueleto apendicular de la institución." Este defecto afecta el 1.2% de los recién nacidos y el 10 % de esta aparición ocurre en las extremidades superiores, siendo la duplicación del pulgar la polidactilia más común de la mano. La polisindactilia es una entidad con muy poca frecuencia, es más común en la población blanca y asiática, en esta entidad es importante el tratamiento temprano para evitar deformidades en el dedo afectado, Idealmente se debe realizar la cirugía entre los 10 y 12 meses de edad.
ABSTRACT Polysyndactyly is a congenital defect that occurs in the hands or feet, or both at the same time and that consists of the existence of multiple supernumerary fingers in addition to the fusion of soft tissue and / or bone between adjacent fingers, generating the total or partial absence of the space between two fingers. The case of a 35-year-old female patient is presented. He does not present any personal pathological history of interest, or known drug allergies. It presents a complex syndactyly in the thumb of the right hand, with preaxial polydactyly, accompanied by decreased mobility in the joints of this finger. This patient voluntarily and with informed consent is part of the research project "Congenital defects of the appendicular skeleton of the institution." This defect affects 1.2% of newborns and 10% of this appearance occurs in the upper extremities, being the duplication of the thumb the most common polydactyly of the hand. Polysyndactyly is an entity with very little frequency, it is more common in the white and Asian population, in this entity early treatment is important to avoid deformities in the affected finger, Ideally, surgery should be performed between 10 and 12 months of age.
RESUMO A polissindactilia é um defeito congênito que ocorre nas mãos ou nos pés, ou ambos ao mesmo tempo e que consiste na existência de múltiplos dedos supranumerários além da fusão de tecidos moles e / ou osso entre os dedos adjacentes, gerando o total ou parcial ausência de espaço entre dois dedos. É apresentado o caso de uma paciente de 35 anos de idade. Ele não apresenta nenhuma história patológica pessoal de interesse ou alergia a medicamentos conhecida. Apresenta sindactilia complexa no polegar da mão direita, com polidactilia pré-axial, acompanhada de diminuição da mobilidade nas articulações deste dedo. Este paciente voluntariamente e com consentimento informado faz parte do projeto de pesquisa "Defeitos congênitos do esqueleto apendicular da instituição". Esse defeito atinge 1,2% dos recém-nascidos e 10% desse aparecimento ocorre nas extremidades superiores, sendo a duplicação do polegar a polidactilia da mão mais comum. A polissindactilia é uma entidade com muito pouca frequência, é mais comum na população branca e asiática, nesta entidade o tratamento precoce é importante para evitar deformidades no dedo afetado. Idealmente, a cirurgia deve ser realizada entre 10 e 12 meses de idade.
RESUMO
We present a case of oro-facial-digital syndrome type II (Mohr's syndrome) which is characterized by malformations of the oral cavity, face and digits. The facial and oral features include tongue nodules, cleft or high-arched palate, missing teeth, broad nose; cleft lip. The digital features include clinodactyly, polydactyly, syndactyly, brachydactyly and duplication of the hallux.