1
|
Spineli-Silva S, Monlleó IL, Félix TM, Gil-da-Silva-Lopes VL, Vieira TP. Overlapping Spectrum of Craniofacial Microsomia Phenotype in Cat-Eye Syndrome. Cleft Palate Craniofac J 2023:10556656231174435. [PMID: 37183441 DOI: 10.1177/10556656231174435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Abstract
This study reports three patients with Cat-eye Syndrome (CES), two of which present a previous clinical diagnosis of Craniofacial microsomia (CFM). Chromosomal microarray analysis (CMA) revealed a tetrasomy of 1,7 Mb at the 22q11.2q11.21 region, which is the typical region triplicated in the CES, in all patients. The most frequent craniofacial features found in individuals with CFM and CES are preauricular tags and/or pits and mandibular hypoplasia. We reinforce that the candidate genes for CFM features, particularly ear malformation, preauricular tags/pits, and facial asymmetry, can be in the proximal region of the 22q11.2 region.
Collapse
Affiliation(s)
- Samira Spineli-Silva
- Laboratory of Human Cytogenetics and Cytogenomics, Department of Translational Medicine, School of Medical Sciences, State University of Campinas (Unicamp), Campinas, São Paulo, Brazil
| | - Isabella L Monlleó
- Faculty of Medicine, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
- Clinical Genetics Service, University Hospital, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - Têmis M Félix
- Medical Genetics Service, Clinical Hospital of Porto Alegre (HCPA), Porto Alegre, Rio Grande do Sul, Brazil
| | - Vera L Gil-da-Silva-Lopes
- Laboratory of Human Cytogenetics and Cytogenomics, Department of Translational Medicine, School of Medical Sciences, State University of Campinas (Unicamp), Campinas, São Paulo, Brazil
| | - Társis P Vieira
- Laboratory of Human Cytogenetics and Cytogenomics, Department of Translational Medicine, School of Medical Sciences, State University of Campinas (Unicamp), Campinas, São Paulo, Brazil
| |
Collapse
|
2
|
Holtz AP, Souza LT, Ribeiro EM, Acosta AX, Lago RMRS, Simoni G, Llerena JC, Félix TM. Genetic analysis of osteogenesis imperfecta in a large Brazilian cohort. Bone 2023; 169:116683. [PMID: 36709916 DOI: 10.1016/j.bone.2023.116683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 12/27/2022] [Accepted: 01/23/2023] [Indexed: 01/28/2023]
Abstract
INTRODUCTION Osteogenesis imperfecta (OI) is a genetically and clinically heterogeneous disorder caused by disruption of type I collagen synthesis. Previous Brazilian molecular OI studies have been restricted to case reports or small cohorts. The Brazilian OI Network (BOIN) is a multicenter study collecting clinical OI treatment data from five reference centers in three regions of Brazil. OBJECTIVE To describe the molecular analysis of a large cohort of OI registered at BOIN. METHODS Targeted next-generation sequencing (NGS) was performed at a centralized laboratory with the Ion Torrent platform, covering 99.6 % of the coding regions of 18 OI-associated genes. Clinical information was obtained from a clinical database. RESULTS We included 156 subjects in the molecular analyses. Variants were detected in 121 subjects: 65 (53.7 %) in COL1A1, 42 (34.7 %) in COL1A2, 2 (1.7 %) in IFITM5, one (0.8 %) in CRTAP, three (2.5 %) in P3H1, two (1.7 %) in PPIB, four (3.3 %) FKBP10, one (0.8 %) in SERPINH1, and one (0.8 %) in TMEM38B. Ninety-one distinct variants were identified, of which 26 were novel. Of the 107 variants identified in COL1A1 and COL1A2, 24.5 % cause mild OI, while the remaining 75.5 % cause moderate, severe, or lethal OI, of which 49.3 % are glycine to serine substitutions. A single variant in FKBP10 (c.179A>C; p.Gln60Pro) was found in three unrelated and non-consanguineous participants living in the same geographic area in Northeast Brazil, suggesting a possible founder effect. CONCLUSION Consistent with the literature, 88.4 % of the subjects had a variant in the COL1A1 and COL1A2 genes, with 10 % inherited in an autosomal recessive manner. Notably, one variant in FKBP10 with a potential founder effect requires further investigation. Data from this large cohort improves our understanding of genotype-phenotype correlations for OI in Brazil.
Collapse
Affiliation(s)
- A P Holtz
- Post Graduate Program in Child and Adolescent Health, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Genomic Medicine Laboratory, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
| | - L T Souza
- Genomic Medicine Laboratory, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
| | - E M Ribeiro
- Genetics Service, Hospital Infantil Albert Sabin, Fortaleza, Brazil
| | - A X Acosta
- Pediatric Department, Hospital Universitário Prof. Edgar Santos, Salvador, Brazil
| | - R M R S Lago
- Pediatric Department, Hospital Universitário Prof. Edgar Santos, Salvador, Brazil
| | - G Simoni
- Pediatric Endocrinology Department, Hospital Infantil Joana de Gusmão, Florianópolis, Brazil
| | - J C Llerena
- Medical Genetics Department, Instituto Nacional Fernandes Figueira - Fiocruz, Rio de Janeiro, Brazil
| | - T M Félix
- Post Graduate Program in Child and Adolescent Health, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Genomic Medicine Laboratory, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil; Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil.
| |
Collapse
|
3
|
Lustosa-Mendes E, Santos APD, Vieira TP, Ribeiro EM, Rezende AA, Fett-Conte AC, Cavalcanti DP, Félix TM, Monlleó IL, Gil-da-Silva-Lopes VL. Identification of genomic imbalances in oral clefts. J Pediatr (Rio J) 2021; 97:321-328. [PMID: 32707036 PMCID: PMC9432012 DOI: 10.1016/j.jped.2020.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 05/31/2020] [Accepted: 06/01/2020] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE This article presents a clinical and cytogenomic approach that focuses on the diagnosis of syndromic oral clefts (OCs). METHODS The inclusion criteria were individuals with OC presenting four or more minor signs and no major defects (non-syndromic oral clefts [NSOCs]) as well as individuals with OC presenting at least another major defect, regardless of the number of minor signs (syndromic oral clefts [SOCs]). The exclusion criteria included NSOC with less than four minor signs, SOC with known etiology, as well as atypical oral clefts. RESULTS Of 1647 individuals with OC recorded in the Brazilian Database of Craniofacial Anomalies, 100 individuals were selected for chromosome microarray analysis (CMA). Among these, 44 individuals were clinically classified as NSOC and 56 as SOC. CMA was performed for both groups, and abnormal CMA was identified in 9%, all previously classified as SCO. The clinical and CMA data analyses showed a significant predominance of abnormal CMA in individuals classified as SOC (p = 0.0044); prematurity, weight, length, and head circumference at birth were significantly lower in the group with abnormal CMA. Besides, minor signs were significantly higher in this group (p = 0.0090). CONCLUSION The rigorous selection of cases indicates that the significant variables could help in early recognition of SOC. This study reinforces the importance of applying the CMA technique to establish the diagnosis of SOC. This is an important and universal issue in clinical practice for intervention, care, and genetic counseling.
Collapse
Affiliation(s)
- Elaine Lustosa-Mendes
- Universidade de Campinas (Unicamp), Faculdade de Ciências Médicas, Departamento de Genética Médica e Medicina Genômica, Campinas, SP, Brazil; Centro de Atendimento Integral ao Fissurado Labio-Palatal, Hospital do Trabalhador (CAIF-HT), Curitiba, PR, Brazil
| | - Ana P Dos Santos
- Universidade de Campinas (Unicamp), Faculdade de Ciências Médicas, Departamento de Genética Médica e Medicina Genômica, Campinas, SP, Brazil
| | - Társis P Vieira
- Universidade de Campinas (Unicamp), Faculdade de Ciências Médicas, Departamento de Genética Médica e Medicina Genômica, Campinas, SP, Brazil
| | - Erlane M Ribeiro
- Hospital Infantil Albert Sabin (HIAS), Serviço de Genética Médica, Fortaleza, CE, Brazil
| | - Adriana A Rezende
- Universidade Federal do Rio Grande do Norte (UFRN), Hospital Universitário Onofre Lopes (HUOL), Empresa Brasileira de Serviços Hospitalares (EBSERH), Natal, RN, Brazil
| | - Agnes C Fett-Conte
- Faculdade de Medicina de São José do Rio Preto (FAMERP/FUNFARME), Departamento de Biologia Molecular, São José do Rio Preto, SP, Brazil
| | - Denise P Cavalcanti
- Universidade de Campinas (Unicamp), Faculdade de Ciências Médicas, Departamento de Genética Médica e Medicina Genômica, Programa Genético Perinatal, Campinas, SP, Brazil
| | - Têmis M Félix
- Hospital de Clínicas de Porto Alegre (HCPA), Serviço de Genética Médica, Porto Alegre, RS, Brazil
| | - Isabella L Monlleó
- Universidade Federal de Alagoas (UFAL), Faculdade de Medicina, Setor de Genética Médica, Hospital Universitário, Serviço de Genética Clínica, Maceió, AL, Brazil
| | - Vera Lúcia Gil-da-Silva-Lopes
- Universidade de Campinas (Unicamp), Faculdade de Ciências Médicas, Departamento de Genética Médica e Medicina Genômica, Campinas, SP, Brazil.
| |
Collapse
|
4
|
Spineli‐Silva S, Sgardioli IC, Santos AP, Bergamini LL, Monlleó IL, Fontes MIB, Félix TM, Ribeiro EM, Xavier AC, Lustosa‐Mendes E, Gil‐da‐Silva‐Lopes VL, Vieira TP. Genomic imbalances in craniofacial microsomia. Am J Med Genet 2020; 184:970-985. [DOI: 10.1002/ajmg.c.31857] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/04/2020] [Accepted: 11/10/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Samira Spineli‐Silva
- Department of Medical Genetics and Genomic Medicine School of Medical Sciences, State University of Campinas (Unicamp) Campinas Brazil
| | - Ilária C. Sgardioli
- Department of Medical Genetics and Genomic Medicine School of Medical Sciences, State University of Campinas (Unicamp) Campinas Brazil
| | - Ana P. Santos
- Department of Medical Genetics and Genomic Medicine School of Medical Sciences, State University of Campinas (Unicamp) Campinas Brazil
| | - Luna L. Bergamini
- Faculty of Medicine Federal University of Alagoas (UFAL) Maceió Brazil
| | - Isabella L. Monlleó
- Faculty of Medicine Federal University of Alagoas (UFAL) Maceió Brazil
- Clinical Genetics Service University Hospital, Federal University of Alagoas (UFAL) Maceió Brazil
| | - Marshall I. B. Fontes
- Clinical Genetics Service University Hospital, Federal University of Alagoas (UFAL) Maceió Brazil
| | - Têmis M. Félix
- Medical Genetics Service Clinical Hospital of Porto Alegre (HCPA) Porto Alegre Brazil
| | - Erlane M. Ribeiro
- Medical Genetics Service Hospital Infantil Albert Sabin (HIAS) Fortaleza Brazil
| | - Ana C. Xavier
- Centre for Research and Rehabilitation of Lip and Palate Lesions Centrinho Prefeito Luiz Gomes Joinville Brazil
| | | | - Vera L. Gil‐da‐Silva‐Lopes
- Department of Medical Genetics and Genomic Medicine School of Medical Sciences, State University of Campinas (Unicamp) Campinas Brazil
| | - Tarsis P. Vieira
- Department of Medical Genetics and Genomic Medicine School of Medical Sciences, State University of Campinas (Unicamp) Campinas Brazil
| |
Collapse
|
5
|
Zambrano MB, Félix TM, Mello ED. Calcium intake improvement after nutritional intervention in paediatric patients with osteogenesis imperfecta. J Hum Nutr Diet 2019; 32:619-624. [PMID: 31037781 DOI: 10.1111/jhn.12657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND In several bone disorders, adequate calcium intake is a coadjuvant intervention to regular treatment. Osteogenesis imperfecta (OI) is a collagen disorder with a range of symptoms, ranging from fractures to minimum trauma, and it is typically treated with bisphosphonates. In the present study, we evaluate the impact of a nutritional intervention (NI) on dietary calcium intake and bone mineral density (BMD) in paediatric patients with OI. METHODS A nonrandomised clinical trial was designed with a NI. Dietary calcium intake, anthropometry and clinical features were assessed at baseline, including anthropometry, basal metabolic rate (BMR), BMD. In addition, a food guidance form was developed and sent to patients by mail. After 12 months, clinical features of patients were reassessed and compared with the baseline data. RESULTS Fifty-two children and adolescents were enrolled. Significant increases in total calcium intake (mg day-1 ), percentage of adequate calcium intake (%) and number of cups of milk ingested were observed after NI. We detected a positive correlation between the variation of BMD and milk consumption in patients treated with bisphosphonate. CONCLUSIONS We observed an increase in calcium intake in patients with OI. This finding demonstrates the importance of nutrition therapy as part of a multidisciplinary treatment approach for bone health.
Collapse
Affiliation(s)
- M B Zambrano
- Post Graduate Program in Child and Adolescent Health, University of Rio Grande do Sul, Porto Alegre, Brazil
| | - T M Félix
- Post Graduate Program in Child and Adolescent Health, University of Rio Grande do Sul, Porto Alegre, Brazil.,Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
| | - E D Mello
- Post Graduate Program in Child and Adolescent Health, University of Rio Grande do Sul, Porto Alegre, Brazil.,Department of Pediatrics, School of Medicine, University of Rio Grande do Sul, Porto Alegre, Brazil
| |
Collapse
|
6
|
Volpe-Aquino RM, Monlleó IL, Lustosa-Mendes E, Mora AF, Fett-Conte AC, Félix TM, Xavier AC, Tonocchi R, Ribeiro EM, Pereira R, Boy da Silva RT, de Rezende AA, Cavalcanti DP, Gil-da-Silva-Lopes VL. CranFlow
: An Application for Record-Taking and Management Through the Brazilian Database on Craniofacial Anomalies. Birth Defects Res 2017; 110:72-80. [DOI: 10.1002/bdr2.1123] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Revised: 07/23/2017] [Accepted: 08/09/2017] [Indexed: 01/15/2023]
Affiliation(s)
- Roberta M. Volpe-Aquino
- Department of Medical Genetics; School of Medical Sciences, State University of Campinas - Unicamp; Campinas SP Brazil
| | - Isabella L. Monlleó
- Clinical Genetics Service; School of Medicine, University Hospital, Federal University of Alagoas - Ufal; Maceió AL Brazil
| | - Elaine Lustosa-Mendes
- Department of Medical Genetics; School of Medical Sciences, State University of Campinas - Unicamp; Campinas SP Brazil
- Assistance Center for Cleft Lip and Palate - CAIF-AFISSUR; Curitiba PR Brazil
| | - Amanda F. Mora
- Department of Medical Genetics; School of Medical Sciences, State University of Campinas - Unicamp; Campinas SP Brazil
| | - Agnes C. Fett-Conte
- Department of Molecular Biology; Medical School of São José do Rio Preto - FAMERP/FUNFARME; São José do Rio Preto SP Brazil
| | - Têmis M. Félix
- Medical Genetics Service; Clinical Hospital of Porto Alegre - HCPA; Porto Alegre RS Brazil
| | - Ana C. Xavier
- Center for Research and Rehabilitation of Lip and Palate Lesions - CRRLPL; Centrinho Prefeito Luiz Gomes; Joinville SC Brazil
| | - Rita Tonocchi
- Assistance Center for Cleft Lip and Palate - CAIF-AFISSUR; Curitiba PR Brazil
| | - Erlane M. Ribeiro
- Medical Genetics Service; Hospital Infantil Albert Sabin - HIAS; Fortaleza CE Brazil
| | - Rui Pereira
- Institute of Integral Medicine, Prof. Fernando Figueira - IMIP; Recife PE Brazil
| | | | - Adriana A. de Rezende
- Department of Clinical and Toxicological Analysis; School of Pharmaceutical Sciences; Hospital Onofre Lopes (HUOL), Federal University of Rio Grande do Norte (UFRN); Natal RN Brazil
| | - Denise P. Cavalcanti
- Perinatal Genetics Program; Department of Medical Genetics, Faculty of Medical Sciences, State University of Campinas; Campinas SP Brazil
| | - Vera L. Gil-da-Silva-Lopes
- Department of Medical Genetics; School of Medical Sciences, State University of Campinas - Unicamp; Campinas SP Brazil
| |
Collapse
|
7
|
Borsatto T, Sperb-Ludwig F, Lima SE, Carvalho MRS, Fonseca PAS, Camelo JS, Ribeiro EM, de Medeiros PFV, Lourenço CM, de Souza CFM, Boy R, Félix TM, Bittar CM, Pinto LLC, Neto EC, Blom HJ, Schwartz IVD. Correction: Biotinidase deficiency: Genotype-biochemical phenotype association in Brazilian patients. PLoS One 2017. [PMID: 28640880 PMCID: PMC5481009 DOI: 10.1371/journal.pone.0180463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
8
|
Borsatto T, Sperb-Ludwig F, Lima SE, S. Carvalho MR, S. Fonseca PA, S. Camelo J, M. Ribeiro E, F. V. de Medeiros P, M. Lourenço C, F. M. de Souza C, Boy R, Félix TM, M. Bittar C, L. C. Pinto L, C. Neto E, J. Blom H, D. Schwartz IV. Biotinidase deficiency: Genotype-biochemical phenotype association in Brazilian patients. PLoS One 2017; 12:e0177503. [PMID: 28498829 PMCID: PMC5428951 DOI: 10.1371/journal.pone.0177503] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 04/30/2017] [Indexed: 11/18/2022] Open
Abstract
Introduction The association between the BTD genotype and biochemical phenotype [profound biotinidase deficiency (BD), partial BD or heterozygous activity] is not always consistent. This study aimed to investigate the genotype-biochemical phenotype association in patients with low biotinidase activity. Methods All exons, the 5'UTR and the promoter of the BTD gene were sequenced in 72 Brazilian individuals who exhibited low biotinidase activity. For each patient, the expected biochemical phenotype based on the known genotype was compared with the observed biochemical phenotype. Additional non-genetic factors that could affect the biotinidase activity were also analysed. Results Most individuals were identified by neonatal screening (n = 66/72). When consecutive results for the same patient were compared, age, prematurity and neonatal jaundice appeared to affect the level of biotinidase activity. The biochemical phenotype at the time of the second blood collection changed in 11/22 patients compared to results from the first sample. Three novel variants were found: c.1337T>C (p.L446P), c.1466A>G (p.N489S) and c.962G>A (p.W321*). Some patients with the same genotype presented different biochemical phenotypes. The expected and observed biochemical phenotypes agreed in 68.5% of cases (concordant patients). The non-coding variants c.-183G>A, c.-315A>G and c.-514C>T were present in heterozygosis in 5/17 discordant patients. In addition, c.-183G>A and c.-514C>T were also present in 10/37 concordant patients. Conclusions The variants found in the promoter region do not appear to have a strong impact on biotinidase activity. Since there is a disparity between the BTD genotype and biochemical phenotype, and biotinidase activity may be affected by both genetic and non-genetic factors, we suggest that the diagnosis of BD should be based on more than one measurement of plasma biotinidase activity. DNA analysis can be of additional relevance to differentiate between partial BD and heterozygosity.
Collapse
Affiliation(s)
- Taciane Borsatto
- Post Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
- BRAIN Laboratory, Center for Experimental Research (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil
- * E-mail:
| | - Fernanda Sperb-Ludwig
- Post Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
- BRAIN Laboratory, Center for Experimental Research (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil
| | - Samyra E. Lima
- BRAIN Laboratory, Center for Experimental Research (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil
- Centro Universitário Ritter dos Reis, Porto Alegre, RS, Brazil
| | | | | | - José S. Camelo
- Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | | | | | - Charles M. Lourenço
- Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | | | - Raquel Boy
- Departamento de Pediatria, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Têmis M. Félix
- Medical Genetics Service, HCPA, Porto Alegre, RS, Brazil
| | - Camila M. Bittar
- Post Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
- Medical Genetics Service, HCPA, Porto Alegre, RS, Brazil
| | | | | | - Henk J. Blom
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, University Medical Centre Freiburg, Freiburg, Germany
| | - Ida V. D. Schwartz
- Post Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
- BRAIN Laboratory, Center for Experimental Research (CPE), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil
- Medical Genetics Service, HCPA, Porto Alegre, RS, Brazil
| |
Collapse
|
9
|
Málaga DR, Facchin ACB, Tirelli KM, Félix TM, Schulte J, Pereira J, Neto EC, Filho CS, Giugliani R. Research Article Pseudo deficiency of acid α-glucosidase: a challenge in the newborn screening for Pompe diseases. Genet Mol Res 2017. [DOI: 10.4238/gmr16039844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
10
|
Manzoli GN, Bademci G, Acosta AX, Félix TM, Cengiz FB, Foster J, Da Silva DSD, Menendez I, Sanchez-Pena I, Tekin D, Blanton SH, Abe-Sandes K, Liu XZ, Tekin M. Targeted Resequencing of Deafness Genes Reveals a Founder MYO15A Variant in Northeastern Brazil. Ann Hum Genet 2016; 80:327-331. [PMID: 27870113 PMCID: PMC5127167 DOI: 10.1111/ahg.12177] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 08/23/2016] [Accepted: 10/06/2016] [Indexed: 11/29/2022]
Abstract
Identifying the genetic etiology in a person with hearing loss (HL) is challenging due to the extreme genetic heterogeneity in HL and the population-specific variability. In this study, after excluding GJB2 variants, targeted resequencing of 180 deafness-related genes revealed the causative variants in 11 of 19 (58%) Brazilian probands with autosomal recessive HL. Identified pathogenic variants were in MYO15A (10 families) and CLDN14 (one family). Remarkably, the MYO15A p.(Val1400Met) variant was identified in eight families from the city of Monte Santo in the northeast region of Brazil. Haplotype analysis of this variant was consistent with a single founder. No other cases with this variant were detected among 105 simplex cases from other cities of northeastern Brazil, suggesting that this variant is confined to a geographical region. This study suggests that it is feasible to develop population-specific screening for deafness variants once causative variants are identified in different geographical groups.
Collapse
Affiliation(s)
- Gabrielle N Manzoli
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
- Gonçalo Moniz Research Center (CPqGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, Bahia, Brazil
| | - Guney Bademci
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Angelina X Acosta
- Gonçalo Moniz Research Center (CPqGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, Bahia, Brazil
| | - Têmis M Félix
- Serviço de Genética Médica, Hospital de Clinicas de Porto Alegre, Brazil
| | - F Basak Cengiz
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Joseph Foster
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Danniel S Dias Da Silva
- Gonçalo Moniz Research Center (CPqGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, Bahia, Brazil
| | - Ibis Menendez
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Isalis Sanchez-Pena
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Demet Tekin
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Susan H Blanton
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Kiyoko Abe-Sandes
- Gonçalo Moniz Research Center (CPqGM), Oswaldo Cruz Foundation (FIOCRUZ), Salvador, Bahia, Brazil
| | - Xue Zhong Liu
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Mustafa Tekin
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| |
Collapse
|
11
|
Karam SM, Barros AJD, Matijasevich A, Dos Santos IS, Anselmi L, Barros F, Leistner-Segal S, Félix TM, Riegel M, Maluf SW, Giugliani R, Black MM. Intellectual Disability in a Birth Cohort: Prevalence, Etiology, and Determinants at the Age of 4 Years. Public Health Genomics 2016; 19:290-7. [PMID: 27595410 PMCID: PMC5079101 DOI: 10.1159/000448912] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 08/06/2016] [Indexed: 01/21/2023] Open
Abstract
Background Intellectual disability (ID), characterized by impairments in intellectual function and adaptive behavior, affects 1-3% of the population. Many studies investigated its etiology, but few are cohort studies in middle-income countries. Aims To estimate prevalence, etiology, and factors related to ID among children prospectively followed since birth in a Southern Brazilian city (Pelotas). Methods In 2004, maternity hospitals were visited daily and births were identified. Live-born infants (n = 4,231) whose family lived in the urban area have been followed for several years. At the age of 2 and 4 years, performances in development and intelligence tests were evaluated using the Battelle Developmental Inventory and Wechsler Intelligence Scale, respectively. Children considered as having developmental delay were invited to attend a genetic evaluation. Results At 4 years of age, the prevalence of ID was 4.5%, and the etiology was classified into 5 groups: environmental (44.4%), genetic (20.5%), idiopathic (12.6%), neonatal sequelae (13.2%), other diseases (9.3%). Most children presented impairment in two or more areas of adaptive behavior. There was no difference in prenatal care attendance or maternal schooling among the groups. Conclusion For about 40% of children, ID was attributed to nonbiological factors, suggesting that the rate may be reduced with appropriate interventions early in life.
Collapse
Affiliation(s)
- Simone M Karam
- Programa de Pós-Graduação em Saúde da Criança e do Adolescente, UFRGS, Porto Alegre, Brazil
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
de Souza LT, Kowalski TW, Ferrari J, Monlléo IL, Ribeiro EM, de Souza J, Fett-Conte AC, de Araujo TK, Gil-da-Silva-Lopes VL, Ribeiro-dos-Santos ÂKC, dos Santos SEB, Félix TM. Study ofIRF6and 8q24 region in non-syndromic oral clefts in the Brazilian population. Oral Dis 2016; 22:241-5. [DOI: 10.1111/odi.12432] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/24/2015] [Accepted: 12/17/2015] [Indexed: 02/03/2023]
Affiliation(s)
- LT de Souza
- Laboratório de Medicina Genômica - Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Programa de Pós-Graduação em Saúde da Criança e do Adolescente; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - TW Kowalski
- Programa de Pós-Graduação em Genética e Biologia Molecular; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - J Ferrari
- Laboratório de Medicina Genômica - Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| | - IL Monlléo
- Serviço de Genética Clínica; Faculdade de Medicina; Hospital Universitário Professor Alberto Antunes; Universidade Federal de Alagoas; Maceió Brazil
| | - EM Ribeiro
- Hospital Infantil Albert Sabin; Fortaleza Brazil
| | - J de Souza
- Centro de Atendimento Integral ao Fissurado Lábio-palatal; Curitiba Brazil
| | - AC Fett-Conte
- Serviço de Genética; Faculdade de Medicina de São José do Rio Preto; São José do Rio Preto Brazil
| | - TK de Araujo
- Departamento de Genética Médica; Faculdade de Ciências Médicas; Universidade de Campinas; Campinas Brazil
| | - VL Gil-da-Silva-Lopes
- Departamento de Genética Médica; Faculdade de Ciências Médicas; Universidade de Campinas; Campinas Brazil
| | - ÂKC Ribeiro-dos-Santos
- Laboratório de Genética Humana e Médica; Instituto de Ciências Biológicas; Universidade Federal do Pará; Belém Brazil
| | - SEB dos Santos
- Laboratório de Genética Humana e Médica; Instituto de Ciências Biológicas; Universidade Federal do Pará; Belém Brazil
| | - TM Félix
- Laboratório de Medicina Genômica - Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
- Programa de Pós-Graduação em Saúde da Criança e do Adolescente; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
- Serviço de Genética Médica; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
| |
Collapse
|
13
|
Brizola E, Mattos EP, Ferrari J, Freire POA, Germer R, Llerena JC, Félix TM. Clinical and Molecular Characterization of Osteogenesis Imperfecta Type V. Mol Syndromol 2015; 6:164-72. [PMID: 26648832 DOI: 10.1159/000439506] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2015] [Indexed: 12/13/2022] Open
Abstract
Osteogenesis imperfecta type V (OI-V) has a wide clinical variability, with distinct clinical/radiological features, such as calcification of the interosseous membrane (CIM) between the radius-ulna and/or tibia-fibula, hyperplastic callus (HPC) formation, dislocation of the radial head (DRH), and absence of dentinogenesis imperfecta (DI). Recently, a single heterozygous mutation (c.-14C>T) in the 5'UTR of the IFITM5 gene was identified to be causative for OI-V. Here, we describe 7 individuals from 5 unrelated families that carry the c.-14C>T IFITM5 mutation. The clinical findings in these cases are: absence of DI in all patients, presence of blue sclera in 2 cases, and 4 patients with DRH. Radiographic findings revealed HPC in 3 cases. All patients presented CIM between the radius and ulna, while 4 patients presented additional CIM between the tibia and fibula. Spinal fractures by vertebral compression were observed in all individuals. The proportion of cases identified with this mutation represents 4% of OI cases at our institution. The clinical identification of OI-V is crucial, as this mutation has an autosomal dominant inheritance with variable expressivity.
Collapse
Affiliation(s)
- Evelise Brizola
- Postgraduate Programs in Child and Adolescent Health, Porto Alegre, Brazil
| | - Eduardo P Mattos
- Genetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Jessica Ferrari
- Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
| | | | - Raquel Germer
- Medical Genetics Center, Instituto Nacional de Saúde da Mulher, da Criança e do Adolescente Fernandes Figueira/FIOCRUZ, Rio de Janeiro, Brazil
| | - Juan C Llerena
- Medical Genetics Center, Instituto Nacional de Saúde da Mulher, da Criança e do Adolescente Fernandes Figueira/FIOCRUZ, Rio de Janeiro, Brazil
| | - Têmis M Félix
- Postgraduate Programs in Child and Adolescent Health, Porto Alegre, Brazil ; Medical Genetics Service, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
| |
Collapse
|
14
|
Vanz AP, Félix TM, da Rocha NS, Schwartz IVD. Quality of life in caregivers of children and adolescents with Osteogenesis Imperfecta. Health Qual Life Outcomes 2015; 13:41. [PMID: 25889100 PMCID: PMC4414300 DOI: 10.1186/s12955-015-0226-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/20/2015] [Indexed: 11/16/2022] Open
Abstract
Background Osteogenesis imperfecta (OI) is a group of genetic disorders of collagen biosynthesis, characterized by low bone density leading to fractures. Most patients exhibit functional impairment and require the aid of a caregiver. The aim of this study is to assess the quality of life (QoL) of caregivers of patients with OI. Methods In this cross-sectional study, a convenience sampling strategy was used to enroll adult caregivers of children and adolescents with OI who attended a referral center in southern Brazil. The WHOQOL-BREF instrument was used to assess QoL. Results Twenty-four caregivers of 27 patients (10 with type I, 4 with type III, and 13 with type IV OI) were included in the study. Eighteen caregivers were the patients’ mothers, two had OI, and 22 cared for only one patient. Mean WHOQOL-BREF scores were 14.59 for the physical health domain, 13.80 for the psychological domain, 15.19 for the social relationships domain, and 12.87 for the environmental domain; the mean total QoL score was 14.16. QoL scores did not differ significantly according to patients’ OI type or number of fractures. Economic status was not correlated significantly with QoL scores. Conclusions QoL appears to be impaired in caregivers of patients with OI. Additional studies are required to confirm these findings and to ascertain which factors account for this phenomenon.
Collapse
Affiliation(s)
- Ana Paula Vanz
- Postgraduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil. .,Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.
| | - Têmis M Félix
- Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.
| | - Neusa Sica da Rocha
- Postgraduate Program in Medical Sciences: Psychiatry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
| | - Ida V D Schwartz
- Postgraduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil. .,Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil. .,Department of Genetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
| |
Collapse
|
15
|
Karam SM, Riegel M, Segal SL, Félix TM, Barros AJD, Santos IS, Matijasevich A, Giugliani R, Black M. Genetic causes of intellectual disability in a birth cohort: a population-based study. Am J Med Genet A 2015; 167:1204-14. [PMID: 25728503 PMCID: PMC4863139 DOI: 10.1002/ajmg.a.37011] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 01/22/2015] [Indexed: 11/25/2022]
Abstract
Intellectual disability affects approximately 1–3% of the population and can be caused by genetic and environmental factors. Although many studies have investigated the etiology of intellectual disability in different populations, few studies have been performed in middle‐income countries. The present study estimated the prevalence of genetic causes related to intellectual disability in a cohort of children from a city in south Brazil who were followed from birth. Children who showed poor performance in development and intelligence tests at the ages of 2 and 4 were included. Out of 4,231 liveborns enrolled in the cohort, 214 children fulfilled the inclusion criteria. A diagnosis was established in approximately 90% of the children evaluated. Genetic causes were determined in 31 of the children and 19 cases remained unexplained even after extensive investigation. The overall prevalence of intellectual disability in this cohort due to genetic causes was 0.82%. Because this study was nested in a cohort, there were a large number of variables related to early childhood and the likelihood of information bias was minimized by collecting information with a short recall time. This study was not influenced by selection bias, allowing identification of intellectual disability and estimation of the prevalence of genetic causes in this population, thereby increasing the possibility of providing appropriate management and/or genetic counseling. © 2015 The Authors. American Journal of Medical Genetics Part A Published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Simone M Karam
- Programa de Pós-Graduação em Saúde da Criança e do Adolescente, UFRGS, Porto Alegre, Brazil.,Faculdade de Medicina, Universidade Federal do Rio Grande (FURG), Rio Grande, Brazil
| | - Mariluce Riegel
- Serviço de Genética Médica, HCPA, Porto Alegre, Brazil.,Programa de Pós-Graduação em Genética e Biologia Molecular, UFRGS, Porto Alegre, Brazil
| | | | - Têmis M Félix
- Programa de Pós-Graduação em Saúde da Criança e do Adolescente, UFRGS, Porto Alegre, Brazil.,Serviço de Genética Médica, HCPA, Porto Alegre, Brazil
| | | | - Iná S Santos
- Programa de Pós-Graduação em Epidemiologia, UFPel, Pelotas, Brazil
| | - Alicia Matijasevich
- Programa de Pós-Graduação em Epidemiologia, UFPel, Pelotas, Brazil.,Department of Preventive Medicine, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Roberto Giugliani
- Programa de Pós-Graduação em Saúde da Criança e do Adolescente, UFRGS, Porto Alegre, Brazil.,Serviço de Genética Médica, HCPA, Porto Alegre, Brazil.,Departamento de Genética, UFRGS, Porto Alegre, Brazil
| | - Maureen Black
- John A Scholl MD and Mary Louise Scholl MD Endowed Professor, Department of Pediatrics and Department of Epidemiology and Public Health, University of Maryland, Baltimore, Maryland
| |
Collapse
|
16
|
Vieira TP, Monteiro FP, Sgardioli IC, Souza J, Fett-Conte AC, Monlleó IL, Fontes MB, Félix TM, Leal GF, Ribeiro EM, Gil-da-Silva-Lopes VL. Clinical Features in Patients With 22q11.2 Deletion Syndrome Ascertained by Palatal Abnormalities. Cleft Palate Craniofac J 2014; 52:411-6. [PMID: 24805874 DOI: 10.1597/13-233] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES The aim of this study was to describe clinical features in subjects with palatal abnormalities and to assess the distribution of these features among those with and without 22q11.2 deletion. DESIGN Descriptive cohort. PATIENTS One hundred patients with palatal abnormalities and suspicion of 22q11.2 DS were included. METHODS All patients were evaluated by a clinical geneticist, who completed a standardized clinical protocol. The 22q11.2 deletion screening was performed with fluorescence in situ hybridization using the TUPLE1 probe and multiplex ligation-dependent probe amplification using the P250-A1 kit. RESULTS The 22q11.2 deletion was detected in 35 patients, in whom the most frequent clinical features were congenital heart disease (15/30 - 50%), developmental delay (19/35 - 54%), speech delay (20/35 - 57%), learning disabilities (27/35 - 77%), immunologic alterations (18/29 - 62%). In addition, the most common facial dysmorphisms in this group were long face (27/35 - 77%), typical nose (24/35 - 69%), and hooded eyelids (19/35 - 54%). Comparing features in patients with or without the deletion revealed significant differences (positively correlated with the deletion) for speech delay, learning disabilities, conductive hearing loss, number of dysmorphisms, long face, and hooded eyelids. Cleft lip and palate was negatively correlated with the deletion. CONCLUSIONS The presence of speech delay, learning disabilities, conductive hearing loss, long face, and hooded eyelids should reinforce the suspicion of 22q11.2 DS in patients with palatal abnormalities and would help professionals direct clinical follow-up of these patients.
Collapse
|
17
|
Zambrano MB, Brizola ES, Refosco L, Giugliani R, Félix TM. Anthropometry, Nutritional Status, and Dietary Intake in Pediatric Patients with Osteogenesis Imperfecta. J Am Coll Nutr 2014; 33:18-25. [DOI: 10.1080/07315724.2013.827065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
18
|
Souza LT, Kowalski TW, Collares MVM, Félix TM. MSX1 gene and nonsyndromic oral clefts in a Southern Brazilian population. Braz J Med Biol Res 2013; 46:555-8. [PMID: 23903689 PMCID: PMC3859340 DOI: 10.1590/1414-431x20133054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 05/02/2013] [Indexed: 11/22/2022] Open
Abstract
Nonsyndromic oral clefts (NSOC) are the most common craniofacial birth defects in
humans. The etiology of NSOC is complex, involving both genetic and
environmental factors. Several genes that play a role in cellular proliferation,
differentiation, and apoptosis have been associated with clefting. For example,
variations in the homeobox gene family member MSX1, including a
CA repeat located within its single intron, may play a role in clefting. The aim
of this study was to investigate the association between MSX1
CA repeat polymorphism and NSOC in a Southern Brazilian population using a
case-parent triad design. We studied 182 nuclear families with NSOC recruited
from the Hospital de Clínicas de Porto Alegre in Southern Brazil. The
polymorphic region was amplified by the polymerase chain reaction and analyzed
by using an automated sequencer. Among the 182 families studied, four different
alleles were observed, at frequencies of 0.057 (175 bp), 0.169 (173 bp), 0.096
(171 bp) and 0.67 (169 bp). A transmission disequilibrium test with a
family-based association test (FBAT) software program was used for analysis.
FBAT analysis showed overtransmission of the 169 bp allele in NSOC (P=0.0005).
These results suggest that the CA repeat polymorphism of the
MSX1 gene may play a role in risk of NSOC in populations
from Southern Brazil.
Collapse
Affiliation(s)
- L T Souza
- Laborato´ rio de Medicina Genoˆ mica, Centro de Pesquisa Experimental, Hospital de Clinicas de Porto Alegre, Porto Alegre, RS, Brasil
| | | | | | | |
Collapse
|
19
|
Monteiro FP, Vieira TP, Sgardioli IC, Molck MC, Damiano AP, Souza J, Monlleó IL, Fontes MIB, Fett-Conte AC, Félix TM, Leal GF, Ribeiro EM, Banzato CEM, Dantas CDR, Lopes-Cendes I, Gil-da-Silva-Lopes VL. Defining new guidelines for screening the 22q11.2 deletion based on a clinical and dysmorphologic evaluation of 194 individuals and review of the literature. Eur J Pediatr 2013; 172:927-45. [PMID: 23440478 DOI: 10.1007/s00431-013-1964-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Accepted: 01/29/2013] [Indexed: 12/25/2022]
Abstract
The 22q11.2 deletion is the most frequent interstitial deletion in humans and presents a wide phenotypic spectrum, with over 180 clinical manifestations described. Distinct studies have detected frequencies of the deletion ranging from 0 % to 75 %, depending on the studied population and selection criteria adopted. Due to the lack of consensus in this matter, several studies have been conducted aiming to define which patients would be eligible for screening; however, the issue is still up for debate. In order to contribute to the delineation of possible clinical and dysmorphologic guidelines to optimize decision making in the clinical setting, 194 individuals with variable features of the 22q11.2 deletion syndromes (22q11.2DS) were evaluated. Group I, clinical suspicion of 22q11.2DS with palatal anomalies; Group II, clinical suspicion without palatal anomalies; Group III, cardiac malformations associated with the 22q11.2DS; and Group IV, juvenile-onset schizophrenia. Multiplex ligation-dependent probe amplification was used for screening the 22q11.2 deletion, which was detected in 45 patients (23.2 %), distributed as such: Group I, 35/101 (34.7 %); Group II, 4/18 (22.2 %); Group III, 6/52 (11.5 %); and Group IV, 0/23 (0 %). Clinical data were analyzed by frequency distribution and statistically. Based on the present results and on the review of the literature, we propose a set of guidelines for screening patients with distinct manifestations of the 22q11.2DS in order to maximize resources. In addition, we report the dysmorphic features which we found to be statistically correlated with the presence of the 22q11.2DS.
Collapse
Affiliation(s)
- Fabíola P Monteiro
- Department of Medical Genetics, University of Campinas, Tessália Vieira de Camargo Street, 126 - CEP, 13083-887 Campinas, SP, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Masotti C, Ornelas CC, Splendore-Gordonos A, Moura R, Félix TM, Alonso N, Camargo AA, Passos-Bueno MR. Reduced transcription of TCOF1 in adult cells of Treacher Collins syndrome patients. BMC Med Genet 2009; 10:136. [PMID: 20003452 PMCID: PMC2801500 DOI: 10.1186/1471-2350-10-136] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Accepted: 12/14/2009] [Indexed: 01/31/2023]
Abstract
Background Treacher Collins syndrome (TCS) is an autosomal dominant craniofacial disorder caused by frameshift deletions or duplications in the TCOF1 gene. These mutations cause premature termination codons, which are predicted to lead to mRNA degradation by nonsense mediated mRNA decay (NMD). Haploinsufficiency of the gene product (treacle) during embryonic development is the proposed molecular mechanism underlying TCS. However, it is still unknown if TCOF1 expression levels are decreased in post-embryonic human cells. Methods We have estimated TCOF1 transcript levels through real time PCR in mRNA obtained from leucocytes and mesenchymal cells of TCS patients (n = 23) and controls (n = 18). Mutational screening and analysis of NMD were performed by direct sequencing of gDNA and cDNA, respectively. Results All the 23 patients had typical clinical features of the syndrome and pathogenic mutations were detected in 19 of them. We demonstrated that the expression level of TCOF1 is 18-31% lower in patients than in controls (p < 0.05), even if we exclude the patients in whom we did not detect the pathogenic mutation. We also observed that the mutant allele is usually less abundant than the wild type one in mesenchymal cells. Conclusions This is the first study to report decreased expression levels of TCOF1 in TCS adult human cells, but it is still unknown if this finding is associated to any phenotype in adulthood. In addition, as we demonstrated that alleles harboring the pathogenic mutations have lower expression, we herein corroborate the current hypothesis of NMD of the mutant transcript as the explanation for diminished levels of TCOF1 expression. Further, considering that TCOF1 deficiency in adult cells could be associated to pathologic clinical findings, it will be important to verify if TCS patients have an impairment in adult stem cell properties, as this can reduce the efficiency of plastic surgery results during rehabilitation of these patients.
Collapse
Affiliation(s)
- Cibele Masotti
- Centro de Estudos do Genoma Humano, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Brustolin S, Giugliani R, Félix TM. Genetics of homocysteine metabolism and associated disorders. Braz J Med Biol Res 2009; 43:1-7. [PMID: 19967264 DOI: 10.1590/s0100-879x2009007500021] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Accepted: 11/26/2009] [Indexed: 11/22/2022] Open
Abstract
Homocysteine is a sulfur-containing amino acid derived from the metabolism of methionine, an essential amino acid, and is metabolized by one of two pathways: remethylation or transsulfuration. Abnormalities of these pathways lead to hyperhomocysteinemia. Hyperhomocysteinemia is observed in approximately 5% of the general population and is associated with an increased risk for many disorders, including vascular and neurodegenerative diseases, autoimmune disorders, birth defects, diabetes, renal disease, osteoporosis, neuropsychiatric disorders, and cancer. We review here the correlation between homocysteine metabolism and the disorders described above with genetic variants on genes coding for enzymes of homocysteine metabolism relevant to clinical practice, especially common variants of the MTHFR gene, 677C>T and 1298A>C. We also discuss the management of hyperhomocysteinemia with folic acid supplementation and fortification of folic acid and the impact of a decrease in the prevalence of congenital anomalies and a decline in the incidence of stroke mortality.
Collapse
Affiliation(s)
- S Brustolin
- Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brasil
| | | | | |
Collapse
|
22
|
Machida J, Félix TM, Murray JC, Yoshiura KI, Tanemura M, Kamamoto M, Shimozato K, Sonta SI, Ono T. Searching for genes for cleft lip and/or palate based on breakpoint analysis of a balanced translocation t(9;17)(q32;q12). Cleft Palate Craniofac J 2009; 46:532-40. [PMID: 19929093 DOI: 10.1597/08-047.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE Identification of the breakpoints of disease-associated chromosome rearrangements can provide informative clues to a positional cloning approach for genes responsible for inherited diseases. Recently, we found a three-generation Japanese family segregating balanced chromosome translocation t(9;17)(q32;q12). One of the subjects had cleft lip and palate. We examined whether regions near the breakpoint could be associated with cleft lip and/or palate. METHODS We determined the breakpoints involved in the translocation by fluorescence in situ hybridization analysis and subsequent long-range polymerase chain reaction. In order to study the role of these disrupted regions in nonsyndromic cleft lip and/or palate, we performed mutation analysis and a haplotype-based transmission disequilibrium test using tagging single-nucleotide polymorphisms in the flanking regions of the breakpoints in white and Filipino nonsyndromic cleft lip and/or palate populations. RESULTS Sequence analysis demonstrated that two genes, SLC31A1 (solute carrier family 31 member 1) on chromosome 9 and CCL2 (chemokine ligand 2) on chromosome 17, were rearranged with the breaks occurring within their introns. It is interesting that SLC31A1 lies closed to BSPRY (B-box and SPRY domain), which is a candidate for involvement with cleft lip and/or palate. Some of the variants in BSPRY and CCL2 showed significant p values in the cleft lip and/or palate population compared with the control population. There was also statistically significant evidence of transmission distortion for haplotypes on both chromosomes 9 and 17. CONCLUSIONS The data support previous reports that genes on chromosomal regions of 9q and 17q play an important role in facial development.
Collapse
Affiliation(s)
- Junichiro Machida
- Department of Maxillofacial Surgery, Aichi-Gakuin University, Nagoya, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Félix TM, Tansey MJ, Patil SR, Murray JC, Dagle JM. Double paternal nondisjunction in an infant with transient neonatal diabetes mellitus and Klinefelter syndrome. Am J Med Genet A 2007; 143A:895-8. [PMID: 17366578 DOI: 10.1002/ajmg.a.31659] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Têmis M Félix
- Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, Porto Alegre, RS, Brazil
| | | | | | | | | |
Collapse
|
24
|
Brandalize APC, Bandinelli E, Borba JB, Félix TM, Roisenberg I, Schüler-Faccini L. Polymorphisms in genes MTHFR, MTR and MTRR are not risk factors for cleft lip/palate in South Brazil. Braz J Med Biol Res 2007; 40:787-91. [PMID: 17581676 DOI: 10.1590/s0100-879x2006005000112] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2006] [Accepted: 03/26/2007] [Indexed: 12/22/2022] Open
Abstract
Non-syndromic cleft lip and palate (CL/P) occurs due to interaction between genetic and environmental factors. Abnormalities in homocysteine metabolism may play a role in its etiology due to polymorphisms in genes involved in this pathway. Because of the involvement of MTHFR, MTR and MTRR genes with folate metabolism and the evidence that maternal use of folic acid in early pregnancy reduces the risk for CL/P, we evaluated the influence of their polymorphisms on the etiology of CL/P through a case-control study. The analyses involved 114 non-syndromic phenotypically white children with clefts (case) and 110 mothers, and 100 non-affected (control) children and their mothers. The polymorphisms 677C>T of MTHFR, 2756A>G of MTR, and 66A>G of MTRR genes were analyzed by PCR-RFLP. Allelic frequencies did not differ from other studies conducted on white populations for MTHFR 677T allele (0.35) and for MTR 2756G allele (0.17), but MTRR 66G allele frequency (0.35) was lower than observed elsewhere. The genotypic distribution of the 677C>T polymorphisms under study did not show significant differences between CL/P patients, their mothers and controls. These results suggest that the alterations of folate metabolism related to these polymorphisms are not involved in clefting in the population under study.
Collapse
Affiliation(s)
- A P C Brandalize
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | | | | | | | | | | |
Collapse
|
25
|
Netto CBO, Portela LV, Félix TM, Souza DO, Gonçalves CA, Giugliani R. Serum S100B levels in patients with neural tube defects. Clin Chim Acta 2006; 364:275-8. [PMID: 16143320 DOI: 10.1016/j.cca.2005.07.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2004] [Revised: 07/20/2005] [Accepted: 07/20/2005] [Indexed: 11/18/2022]
Abstract
BACKGROUND We investigated the levels of S100B protein in the serum of patients with neural tube defects (NTD), and the ontogenetic variation on this group of patients. METHODS Samples from 24 control individuals and 25 patients with NTD were studied. S100B protein levels were determined using LIA-mat Sangtec kit. RESULTS We observed no difference between the levels of S100B in NTD patients (median 0.860 microg/l) and control individuals (median 0.580 microg/l). When groups were classified according to age, decreased levels were observed in subjects > or = 4 y compared to the younger ones, on the control group; no significant difference was observed when the same comparison is performed on the group of patients with NTD. CONCLUSIONS This study indicates that the serum concentration of S100B in patients with NTD is similar to that of normal individuals; however, patients with NTD do not show the negative correlation with age which was observed on normal individuals.
Collapse
Affiliation(s)
- Cristina B O Netto
- Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
| | | | | | | | | | | |
Collapse
|
26
|
Abstract
Cleft lip and palate is a common birth defect that has a complex etiology resulting from an interaction of genetic and environmental factors. Few genes are known to contribute to its etiology. CHARGE syndrome is a common multiple malformation syndrome in which 20-36% of the cases have clefting. CHARGE is caused by mutations or deletions in the CHD7 gene. We analyzed the coding regions of CHD7 in nine CHARGE cases and identified five mutations, four of which were novel. We sequenced selected CHD7 exons in non-syndromic clefting cases from Iowa and Philippines populations, as well as matched controls. Variants in non-syndromic cases were found, however, the numbers were not statistically different from the controls. Association analysis of three single nucleotide polymorphisms (SNPs) using 878 case-parent triads from Iowa and Philippines population showed no significant overtransmission. Mutations in CHD7 are not common in isolated clefting cases and we found minimal evidence that CHD7 can act as a modifier for non-syndromic clefting.
Collapse
Affiliation(s)
- Têmis M Félix
- Department of Pediatrics, University of Iowa, Iowa City, IA 52242, USA
| | | | | | | | | |
Collapse
|
27
|
Vieira AR, Avila JR, Daack-Hirsch S, Dragan E, Félix TM, Rahimov F, Harrington J, Schultz RR, Watanabe Y, Johnson M, Fang J, O'Brien SE, Orioli IM, Castilla EE, FitzPatrick DR, Jiang R, Marazita ML, Murray JC. Medical sequencing of candidate genes for nonsyndromic cleft lip and palate. PLoS Genet 2005; 1:e64. [PMID: 16327884 PMCID: PMC1298935 DOI: 10.1371/journal.pgen.0010064] [Citation(s) in RCA: 184] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2005] [Accepted: 10/17/2005] [Indexed: 11/26/2022] Open
Abstract
Nonsyndromic or isolated cleft lip with or without cleft palate (CL/P) occurs in wide geographic distribution with an average birth prevalence of 1/700. We used direct sequencing as an approach to study candidate genes for CL/P. We report here the results of sequencing on 20 candidate genes for clefts in 184 cases with CL/P selected with an emphasis on severity and positive family history. Genes were selected based on expression patterns, animal models, and/or role in known human clefting syndromes. For seven genes with identified coding mutations that are potentially etiologic, we performed linkage disequilibrium studies as well in 501 family triads (affected child/mother/father). The recently reported MSX1 P147Q mutation was also studied in an additional 1,098 cleft cases. Selected missense mutations were screened in 1,064 controls from unrelated individuals on the Centre d'Étude du Polymorphisme Humain (CEPH) diversity cell line panel. Our aggregate data suggest that point mutations in these candidate genes are likely to contribute to 6% of isolated clefts, particularly those with more severe phenotypes (bilateral cleft of the lip with cleft palate). Additional cases, possibly due to microdeletions or isodisomy, were also detected and may contribute to clefts as well. Sequence analysis alone suggests that point mutations in FOXE1, GLI2, JAG2, LHX8, MSX1, MSX2, SATB2, SKI, SPRY2, and TBX10 may be rare causes of isolated cleft lip with or without cleft palate, and the linkage disequilibrium data support a larger, as yet unspecified, role for variants in or near MSX2, JAG2, and SKI. This study also illustrates the need to test large numbers of controls to distinguish rare polymorphic variants and prioritize functional studies for rare point mutations. Nonsyndromic or isolated cleft lip with or without cleft palate (CL/P) is a birth defect with wide geographic distribution, occurring with an average frequency of 1/700 live births. Treatment can be provided, but it will involve medical, surgical, dental, and psychological personnel. Several different genes have been implicated in different cases. Here the researchers report the results of sequencing 20 different genes in 184 CL/P cases selected with an emphasis on more severe cases and cases with a positive family history for CL/P. Genes were selected based on previous work done by others and by the researchers' group. The authors' results suggest that point mutations in these candidate genes are likely to contribute to about 5% of CL/P, and particularly those with more severe phenotypes (bilateral cleft of the lip with cleft palate). This study also illustrates the need to test large numbers of controls to distinguish rare polymorphic variants and allow investigators to focus functional studies on the rare point mutations that seem to be disease-causing, so that researchers might better understand the mechanisms that play a role in CL/P.
Collapse
Affiliation(s)
- Alexandre R Vieira
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Joseph R Avila
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Sandra Daack-Hirsch
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Ecaterina Dragan
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Têmis M Félix
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Fedik Rahimov
- Interdisciplinary Genetics PhD Program, University of Iowa, Iowa City, Iowa, United States of America
| | - Jill Harrington
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Rebecca R Schultz
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Yoriko Watanabe
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Marla Johnson
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Jennifer Fang
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Sarah E O'Brien
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
| | - Iêda M Orioli
- Latin American Collaborative Study of Congenital Malformations, Department of Genetics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Eduardo E Castilla
- Latin American Collaborative Study of Congenital Malformations, Department of Genetics, Fiocruz, Rio de Janeiro, Brazil
- Center for Medical Education and Investigation, Buenos Aires, Argentina
| | - David R FitzPatrick
- Cell and Molecular Genetics, Medical Research Council Human Genetics Unit, Edinburgh, United Kingdom
| | - Rulang Jiang
- Center for Oral Biology and Department of Biomedical Genetics, University of Rochester, Rochester, New York, United States of America
| | - Mary L Marazita
- Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Jeffrey C Murray
- Department of Pediatrics, University of Iowa, Iowa City, Iowa, United States of America
- * To whom correspondence should be addressed. E-mail:
| |
Collapse
|
28
|
Félix TM, Puga ACS, Cestari T, Cartell A, Cerski M. Infantile Systemic Hyalinosis: report of three unrelated Brazilian children and review of the literature. Clin Dysmorphol 2004; 13:231-236. [PMID: 15365459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
Infantile Systemic Hyalinosis (ISH) is an autosomal recessive disorder characterized by diffuse hyaline deposits in the skin, gastrointestinal tract, muscles and glands. Recently, mutations in the capillary morphogenesis gene-2 (CMG-2), a transmembrane protein with important roles in cell-cell adhesion and cell-extracellular matrix interactions, have been shown to cause ISH. We report on three unrelated Brazilian children presenting in the first days of life with a limited range of joint movements, progressing to painful joint contractures. Additional findings included skin hyperpigmentation over small joints, enlargement of major joints, rigid vertebral spine, thickened skin, facial papuloerythematous rash, and cervical, dorsal and perianal nodules. Skin biopsy performed in all three patients showed diffuse deposits of hyaline material, confirming the diagnosis of ISH.
Collapse
Affiliation(s)
- Têmis M Félix
- Serviço de Genética Médica Serviço de Dermatologia Serviço de Patologia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | | | | | | | | |
Collapse
|
29
|
|
30
|
Félix TM, Leite JC, Maluf SW, Coelho JC. A genetic diagnostic survey in a population of 202 mentally retarded institutionalized patients in the south of Brazil. Clin Genet 1998; 54:219-23. [PMID: 9788725 DOI: 10.1111/j.1399-0004.1998.tb04288.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Associação dos Pais e Amigos dos Excepcionais (APAE) is an institution for mentally retarded patients located at Caxias do Sul in the south of Brazil. A genetic diagnostic survey of 202 individuals from this institution is presented. The patients had a male:female ratio of 1.3:1 and their ages varied from 1 month to 47 years with a mean of 5.5 years. Using personal and family data, careful clinical examination and laboratory investigation, the authors established a definitive diagnosis in 132 patients (65.34%). A constitutional disorder was present in 111 patients (54.95%). Down's syndrome patients represented 32.15%, while 1.98% had other chromosomal anomalies. In 25 patients (12.37%) a disorder of Mendelian inheritance was diagnosed. In 8 patients (3.96%) a multiple congenital anomalies/mental retardation (MCA/MR) syndrome was recorded. Eight patients (3.96%) had a central nervous system (CNS) malformation. An acquired condition was observed in 21 patients (10.39%), including pre- or post-natal infections. In the remaining 70 patients (34.65%) a conclusive diagnosis was not possible.
Collapse
Affiliation(s)
- T M Félix
- Servico de Genética Médica, Hospital de Clínicas de Porto Alegre, Brazil.
| | | | | | | |
Collapse
|
31
|
Abstract
Three families with the fragile X syndrome were studied with the aim to establish the most frequent clinical signs in the affected individuals and heterozygous women. The clinical evaluation, IQ level measurements and cytogenetic studies were performed in 40 subjects, 20 males and 20 females. The fragile X diagnosis was confirmed in all the male individuals with mental retardation. In the postpubertal subjects the most frequent clinical signs were inner canthal distance < 3.5 cm, macro-orchidism, long and narrow face and high arched palate while in the prepubertal subjects the behavioral characteristics as hyperactivity and poor eye contact were the most frequent and were observed in all patients. Twenty six percent of the heterozygous women presented with mental retardation and showed clinical signs rather than behavioral ones. All male individuals with mental retardation were observed as having fragile X [fra(X)] in lymphocytes culture. Sixty three percent of women showed fra(X). There was a positive correlation between the frequency of fra(X) and the clinical characteristics. We emphasize the importance of the clinical evaluation in the study of familial mental retardation and in the screening of isolated cases with suspect of having the fragile X syndrome.
Collapse
Affiliation(s)
- T M Félix
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Brasil.
| | | |
Collapse
|
32
|
Ashton-Prolla P, Félix TM. Say syndrome: a new case with cystic renal dysplasia in discordant monozygotic twins. Am J Med Genet 1997; 70:353-6. [PMID: 9182773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Say syndrome is a rare condition characterized by cleft palate, short stature, and microcephaly. Abu-Libdeh et al. [1993: Am J Med Genet 45:358-360] described a case with cystic renal dysplasia. We describe monozygotic twins discordant for the syndrome with kidney dysplasia. A postzygotic mutation is proposed as the cause of this autosomal dominant syndrome in this case.
Collapse
Affiliation(s)
- P Ashton-Prolla
- Medical Genetics Unit, Hospital de Clínicas de Porto Alegre, Brazil
| | | |
Collapse
|