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ABSTRACT Objective: Our aim is to establish genetic diagnosis of congenital generalized lipodystrophy (CGL) using targeted massively parallel sequencing (MPS), also known as next-generation sequencing (NGS). Subjects and methods: Nine unrelated individuals with a clinical diagnosis of CGL were recruited. We used a customized panel to capture genes related to genetic lipodystrophies. DNA libraries were generated, sequenced using the Illumina MiSeq, and bioinformatics analysis was performed. Results: An accurate genetic diagnosis was stated for all nine patients. Four had pathogenic variants in AGPAT2 and three in BSCL2. Three large homozygous deletions in AGPAT2 were identified by copy-number variant analysis. Conclusions: Although we have found allelic variants in only 2 genes related to CGL, the panel was able to identify different variants including deletions that would have been missed by Sanger sequencing. We believe that MPS is a valuable tool for the genetic diagnosis of multi-genes related diseases, including CGL.

https://doi.org/10.20945/2359-3997000000278 1067 downloads

Diagnosis and Management of Classica Homocystinuria in Brazil: A Summary of 72 Late-Diagnosed Patients
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Poloni, Soraia

; Hoss, Giovana W.

; Sperb-Ludwig, Fernanda

; Borsatto, Taciane

; Doriqui, Maria Juliana R.

; Leão, Emília K.E.A

; Boa-Sorte, Ney

; Lourenço, Charles M.

; Kim, Chong A.

; Souza, Carolina F. M. de

; Rocha, Helio

; Ribeiro, Marcia

; Steiner, Carlos E.

; Moreno, Carolina A.

; Bernardi, Pricila

; Valadares, Eugenia

; Artigalas, Osvaldo

; Carvalho, Gerson

; Wanderley, Hector Y. C.

; D’Almeida, Vânia

; Santana-da-Silva, Luiz C.

; Blom, Henk J.

; Schwartz, Ida V. D.

Journal of Inborn Errors of Metabolism and Screening

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2018, Volume 6 elocation e180007

Resumo: En | Texto: En | PDF: En

Abstract This study described a broad clinical characterization of classical homocystinuria (HCU) in Brazil. This was a cross-sectional, observational study including clinical and biochemical data from 72 patients (60 families) from Brazil (South, n = 13; Southeast, n = 37; Northeast, n = 8; North, n = 1; and Midwest, n = 1). Parental consanguinity was reported in 42% of families. Ocular manifestations were the earliest detected symptom (53% of cases), the main reason for diagnostic suspicion (63% of cases), and the most prevalent manifestation at diagnosis (67% of cases). Pyridoxine responsiveness was observed in 14% of patients. Only 22% of nonresponsive patients on treatment had total homocysteine levels <100 mmol/L. Most commonly used treatment strategies were pyridoxine (93% of patients), folic acid (90%), betaine (74%), vitamin B12 (27%), and low-methionine diet + metabolic formula (17%). Most patients diagnosed with HCU in Brazil are late diagnosed, express a severe phenotype, and poor metabolic control. Milder forms of HCU are likely underrepresented due to underdiagnosis.

https://doi.org/10.1177/2326409818788900 1352 downloads

Long-term follow-up of a female with congenital adrenal hyperplasia due to P450-oxidoreductase deficiency
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Bonamichi, Beatriz D. S. F.

; Santiago, Stella L. M.

; Bertola, Débora R.

; Kim, Chong A.

; Alonso, Nivaldo

; Mendonca, Berenice B.

; Bachega, Tania A. S. S.

; Gomes, Larissa G.

Archives of Endocrinology and Metabolism

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Out 2016, Volume 60 Nº 5 Páginas 500 - 504

Resumo: En | Texto: En | PDF: En

SUMMARY P450 oxidoreductase deficiency (PORD) is a variant of congenital adrenal hyperplasia that is caused by POR gene mutations. The POR gene encodes a flavor protein that transfers electrons from nicotinamide adenine dinucleotide phosphate (NADPH) to all microsomal cytochrome P450 type II (including 21-hydroxylase, 17α-hydroxylase 17,20 lyase and aromatase), which is fundamental for their enzymatic activity. POR mutations cause variable impairments in steroidogenic enzyme activities that result in wide phenotypic variability ranging from 46,XX or 46,XY disorders of sexual differentiation, glucocorticoid deficiency, with or without skeletal malformations similar to Antley-Bixler syndrome to asymptomatic newborns diagnosed during neonatal screening test. Little is known about the PORD long-term evolution. We described a 46,XX patient with mild atypical genitalia associated with severe bone malformation, who was diagnosed after 13 years due to sexual infantilism. She developed large ovarian cysts and late onset adrenal insufficiency during follow-up, both of each regressed after hormone replacement therapies. We also described a late surgical approach for the correction of facial hypoplasia in a POR patient.

https://doi.org/10.1590/2359-3997000000213 2904 downloads

Congenital Heart Disease as a Warning Sign for the Diagnosis of the 22q11.2 Deletion
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Grassi, Marcília S.

; Jacob, Cristina M. A.

; Kulikowski, Leslie D.

; Pastorino, Antonio C.

; Dutra, Roberta L.

; Miura, Nana

; Jatene, Marcelo B.

; Pegler, Stephanie P.

; Kim, Chong A.

; Carneiro-Sampaio, Magda

Arquivos Brasileiros de Cardiologia

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Nov 2014, Volume 103 Nº 5 Páginas 382 - 390

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Fundamento: Alertar para o diagnóstico da síndrome da deleção 22q11.2 (SD 22q11.2) em pacientes com cardiopatias congênitas. Objetivo: Descrever as principais cardiopatias, alterações fenotípicas, metabólicas e imunológicas em uma série de 60 pacientes com a SD22q11.2. Métodos: Foram incluídos 60 pacientes com SD22q11.2 avaliados entre 2007 e 2013 (M:F = 1,3; idades entre 14 dias a 20 anos e 3 meses) em um centro pediátrico de referência para imunodeficiências primárias. O diagnóstico foi feito pela detecção da microdeleção 22q11.2 através de FISH (n = 18) e/ou MLPA (n = 42), associados a dados clínicos e laboratoriais. Foram analisadas as cardiopatias, aspectos fenotípicos evolutivos da fácies, a hipocalcemia e alterações imunológicas associadas. Resultados: Cardiopatias congênitas ocorreram em 77% dos casos, sendo que a tetralogia de Fallot ocorreu em 38,3%. Correção cirúrgica da cardiopatia foi realizada em 34 pacientes. Os dismorfismos craniofaciais foram detectados em 41 pacientes: face (60%) e/ou nariz alongados (53,3%), fenda palpebral estreita (50%), orelhas displásicas com hiperdobramento (48,3%), lábios finos (41,6%), dedos alongados (38,3%) e baixa estatura (36,6%). Hipocalcemia foi observada em 64,2% com redução do nível de paratormônio (PTH) em 25,9%. Observou-se número reduzido de linfócitos totais, CD4 e CD8 em 40%, 53,3%, e 33,3%, respectivamente. Detectou-se hipogamaglobulinemia em um paciente e redução das concentrações de imunoglobulina M (IgM) em outros dois pacientes. Conclusão: Deve-se suspeitar da SD22q11.2 em todos os portadores de cardiopatia congênita com hipocalcemia e/ou dismorfismos faciais, ressaltando-se que muitas dessas alterações podem ser evolutivas. A microdeleção 22q11.2 deve ser confirmada por testes moleculares em todos os pacientes.

Background: To alert for the diagnosis of the 22q11.2 deletion syndrome (22q11.2DS) in patients with congenital heart disease (CHD). Objective: To describe the main CHDs, as well as phenotypic, metabolic and immunological findings in a series of 60 patients diagnosed with 22q11.2DS. Methods: The study included 60 patients with 22q11.2DS evaluated between 2007 and 2013 (M:F=1.3, age range 14 days to 20 years and 3 months) at a pediatric reference center for primary immunodeficiencies. The diagnosis was established by detection of the 22q11.2 microdeletion using FISH (n = 18) and/or MLPA (n = 42), in association with clinical and laboratory information. Associated CHDs, progression of phenotypic facial features, hypocalcemia and immunological changes were analyzed. Results: CHDs were detected in 77% of the patients and the most frequent type was tetralogy of Fallot (38.3%). Surgical correction of CHD was performed in 34 patients. Craniofacial dysmorphisms were detected in 41 patients: elongated face (60%) and/or elongated nose (53.3%), narrow palpebral fissure (50%), dysplastic, overfolded ears (48.3%), thin lips (41.6%), elongated fingers (38.3%) and short stature (36.6%). Hypocalcemia was detected in 64.2% and decreased parathyroid hormone (PTH) level in 25.9%. Decrease in total lymphocytes, CD4 and CD8 counts were present in 40%, 53.3% and 33.3%, respectively. Hypogammaglobulinemia was detected in one patient and decreased concentrations of immunoglobulin M (IgM) in two other patients. Conclusion: Suspicion for 22q11.2DS should be raised in all patients with CHD associated with hypocalcemia and/or facial dysmorphisms, considering that many of these changes may evolve with age. The 22q11.2 microdeletion should be confirmed by molecular testing in all patients.

https://doi.org/10.5935/abc.20140145 9113 downloads

Tegumentary manifestations of Noonan and Noonan-related syndromes
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Quaio, Caio Robledo D'Angioli Costa

; Almeida, Tatiana Ferreira de

; Brasil, Amanda Salem

; Pereira, Alexandre C.

; Jorge, Alexander A. L.

; Malaquias, Alexsandra C.

; Kim, Chong Ae

; Bertola, Debora Romeo

Clinics

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2013, Volume 68 Nº 8 Páginas 1079 - 1083

Resumo: En | Texto: En | PDF: En

OBJECTIVES: Noonan and Noonan-related syndromes are common autosomal dominant disorders with neuro-cardio-facial-cutaneous and developmental involvement. The objective of this article is to describe the most relevant tegumentary findings in a cohort of 41 patients with Noonan or Noonan-related syndromes and to detail certain aspects of the molecular mechanisms underlying ectodermal involvement. METHODS: A standard questionnaire was administered. A focused physical examination and a systematic review of clinical records was performed on all patients to verify the presence of tegumentary alterations. The molecular analysis of this cohort included sequencing of the following genes in all patients: PTPN1, SOS1, RAF1, KRAS, SHOC2 and BRAF. RESULTS: The most frequent tegumentary alterations were xeroderma (46%), photosensitivity (29%), excessive hair loss (24%), recurrent oral ulcers (22%), curly hair (20%), nevi (17%), markedly increased palmar and plantar creases (12%), follicular hyperkeratosis (12%), palmoplantar hyperkeratosis (10%), café-au-lait spots (10%) and sparse eyebrows (7%). Patients with mutations in PTPN11 had lower frequencies of palmar and plantar creases and palmar/plantar hyperkeratosis compared with the other patients. CONCLUSIONS: We observed that patients with mutations in genes directly involved in cell proliferation kinase cascades (SOS1, BRAF, KRAS and RAF1) had a higher frequency of hyperkeratotic lesions compared with patients with mutations in genes that have a more complex interaction with and modulation of cell proliferation kinase cascades (PTPN11).

https://doi.org/10.6061/clinics/2013(08)03 2214 downloads

Síndrome de Berardinelli-Seip: descrição genética e metabólica de cinco pacientes
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Barra, Cristiane B.

; Savoldelli, Roberta D.

; Manna, Thais D.

; Kim, Chong A.

; Magre, Jocelyn

; Porta, Gilda

; Setian, Nuvarte

; Damiani, Durval

Arquivos Brasileiros de Endocrinologia & Metabologia

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Fev 2011, Volume 55 Nº 1 Páginas 54 - 59

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

OBJETIVO: Descrever o perfil genético e metabólico de portadores da síndrome de Berardinelli-Seip (BSCL) acompanhados no Instituto da Criança do HC-FMUSP. SUJEITOS E MÉTODOS: Pacientes com as características clínicas da BSCL (n = 5), todas do sexo feminino, foram avaliadas com dosagens de glicose e insulina, lípides, leptina, enzimas hepáticas, análise de DNA, ultrassonografia abdominal. RESULTADOS: A deficiência de leptina e a hipertrigliceridemia foram constatadas nas cinco pacientes. Três evoluíram para diabetes melito (DM). Quatro tiveram mutação no gene AGPAT2 e uma no gene CAV1. CONCLUSÃO: As alterações metabólicas mais precoces foram a hipertrigliceridemia e a resistência insulínica, culminando no surgimento do DM à época da puberdade, sendo as mutações no gene AGPAT2 as mais frequentes em nossa casuística.

OBJECTIVE: To report the genetic and metabolic profile of patients with Berardinelli-Seip syndrome (BSCL) followed at Instituto da Criança, HC-FMUSP. SUBJECTS AND METHODS: Patients with clinical features of BSCL (n = 5), all female, were evaluated through serum levels of glucose, insulin, lipids, leptin, and liver enzymes. Abdominal sonography and DNA analysis were also performed. RESULTS: Leptin deficiency and hypertriglyceridemia were found in all the patients. Three progressed to diabetes mellitus. Four patients have mutations in AGPAT2 gene and one have a mutation in CAV1 gene. CONCLUSION: The earliest metabolic abnormalities were hypertriglyceridemia and insulin resistance, culminating in the onset of diabetes at the time of puberty. Mutations in the AGPAT2 gene were the most frequent in our patients.

32735 downloads

Co-occurring PTPN11 and SOS1 gene mutations in Noonan syndrome: does this predict a more severe phenotype?
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Brasil, Amanda Salem

; Malaquias, Alexsandra C.

; Wanderley, Luciana Turolla

; Kim, Chong Ae

; Krieger, José Eduardo

; Jorge, Alexander A. L.

; Pereira, Alexandre C.

; Bertola, Débora Romeo

Arquivos Brasileiros de Endocrinologia & Metabologia

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Nov 2010, Volume 54 Nº 8 Páginas 717 - 722

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

A síndrome de Noonan (SN) é uma doença gênica autossômica dominante, com expressão clínica variável, caracterizada por baixa estatura, dismorfismos faciais e cardiopatia. Diferentes genes da via de sinalização RAS/MAPK são responsáveis pela síndrome, sendo as mais frequentes: PTPN11, SOS1, RAF1 e KRAS. O objetivo deste estudo foi relatar um paciente com SN que apresenta mutações em dois genes da via RAS/MAPK a fim de estabelecer se essas mutações levam a uma expressão mais grave do fenótipo. Utilizou-se sequenciamento direto dos genes PTPN11, SOS1, RAF1 e KRAS. Foram identificadas duas mutações em heterozigose previamente descritas: p.N308D e p.R552G nos genes PTPN11 e SOS1, respectivamente. A paciente apresenta quadro clínico típico semelhante ao dos pacientes com SN e mutação em um único gene, mesmo naqueles com a mesma mutação identificada na paciente. Não foi observado um fenótipo mais grave ou atípico na paciente, sugerindo que as mutações não apresentam um efeito aditivo.

Noonan syndrome (NS) is an autosomal dominant disorder, with variable phenotypic expression, characterized by short stature, facial dysmorphisms and heart disease. Different genes of the RAS/MAPK signaling pathway are responsible for the syndrome, the most common are: PTPN11, SOS1, RAF1, and KRAS. The objective of this study was to report a patient with Noonan syndrome presenting mutations in two genes of RAS/MAPK pathway in order to establish whether these mutations lead to a more severe expression of the phenotype. We used direct sequencing of the PTPN11, SOS1, RAF1, and KRAS genes. We have identified two described mutations in heterozygosity: p.N308D and p.R552G in the genes PTPN11 and SOS1, respectively. The patient has typical clinical features similar to the ones with NS and mutation in only one gene, even those with the same mutation identified in this patient. A more severe or atypical phenotype was not observed, suggesting that these mutations do not exhibit an additive effect.

4879 downloads

Mucopolysaccharidosis I, II, and VI: brief review and guidelines for treatment
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Giugliani, Roberto

; Federhen, Andressa

; Muñoz Rojas, Maria Verônica

; Vieira, Taiane

; Artigalás, Osvaldo

; Lapagesse Pinto, Louise

; Azevedo, Ana Cecília

; Acosta, Angelina

; Bonfim, Carmen

; Lourenço, Charles Marques

; Chong Ae, Kim

; Horovitz, Dafne

; Bonfim, Denize

; Norato, Denise

; Marinho, Diane

; Palhares, Durval

; Santos, Emerson Santana

; Ribeiro, Erlane

; Valadares, Eugênia

; Guarany, Fábio

; Lucca, Gisele Rosone de

; Pimentel, Helena

; Souza, Isabel Neves de

; Correa Neto, Jordão

; Fraga, José Carlos

; Goes, José Eduardo

; Cabral, José Maria

; Simionato, José

; Llerena Jr., Juan

; Jardim, Laura

; Giuliani, Liane

; Silva, Luiz Carlos Santana da

; Santos, Mara L.

; Moreira, Maria Angela

; Kerstenetzky, Marcelo

; Ribeiro, Márcia

; Ruas, Nicole

; Barrios, Patricia

; Aranda, Paulo

; Honjo, Rachel

; Boy, Raquel

; Costa, Ronaldo

; Souza, Carolina

; Alcantara, Flavio F.

; Avilla, Silvio Gilberto A.

; Fagondes, Simone

; Martins, Ana Maria

Genetics and Molecular Biology

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2010, Volume 33 Nº 4 Páginas 589 - 604

Resumo: En | Texto: En | PDF: En

Mucopolysaccharidoses (MPS) are rare genetic diseases caused by the deficiency of one of the lysosomal enzymes involved in the glycosaminoglycan (GAG) breakdown pathway. This metabolic block leads to the accumulation of GAG in various organs and tissues of the affected patients, resulting in a multisystemic clinical picture, sometimes including cognitive impairment. Until the beginning of the XXI century, treatment was mainly supportive. Bone marrow transplantation improved the natural course of the disease in some types of MPS, but the morbidity and mortality restricted its use to selected cases. The identification of the genes involved, the new molecular biology tools and the availability of animal models made it possible to develop specific enzyme replacement therapies (ERT) for these diseases. At present, a great number of Brazilian medical centers from all regions of the country have experience with ERT for MPS I, II, and VI, acquired not only through patient treatment but also in clinical trials. Taking the three types of MPS together, over 200 patients have been treated with ERT in our country. This document summarizes the experience of the professionals involved, along with the data available in the international literature, bringing together and harmonizing the information available on the management of these severe and progressive diseases, thus disclosing new prospects for Brazilian patients affected by these conditions.

8605 downloads Citado 6 vezes em SciELO

Infantile autism and 47,XYY karyotype
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Kuczynski, Evelyn

; Bertola, Débora Romeo

; Castro, Cláudia Irene Emílio de

; Koiffmann, Célia Priszkulnik

; Kim, Chong A.

Arquivos de Neuro-Psiquiatria

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Set 2009, Volume 67 Nº 3a Páginas 717 - 718

Resumo: En | Texto: En | PDF: En

5213 downloads Citado 1 vez em SciELO

10.

Omodysplasia: the first reported Brazilian case
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Albano, Lílian Maria

; Oliveira, Luiz A. N.

; Bertola, Débora R.

; Mazzu, Juliana F.

; Kim, Chong Ae

Clinics

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2007, Volume 62 Nº 4 Páginas 531 - 534

Resumo: En | Texto: En | PDF: En

7684 downloads

11.

Hematological findings in Noonan syndrome
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Bertola, Débora R.

; Carneiro, Jorge David A.

; D'Amico, Élbio Antônio

; Kim, Chong A.

; Albano, Lilian Maria José

; Sugayama, Sofia M.M.

; Gonzalez, Claudette H.

Revista do Hospital das Clínicas

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2003, Volume 58 Nº 1 Páginas 5 - 8

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

OBJETIVO: A síndrome de Noonan é uma patologia de múltiplas anomalias congênitas e, dentre os achados clínicos, a diátese hemorrágica está incluída. O propósito deste estudo é determinar a freqüência de anormalidades hemostáticas nos pacientes afetados. MÉTODO: Nós estudamos 30 pacientes afetados pela síndrome quanto aos aspectos hematológicos que consistiu de tempo de sangramento, tempo de protrombina, tempo de tromboplastina parcial ativada, tempo de trombina, contagem de plaquetas e dosagem do fator de coagulação XI. RESULTADOS: Um resultado laboratorial anormal foi observado em 9 desses pacientes (30%). Apesar dos achados mais comuns terem sido as deficiências dos fatores de coagulação, especialmente do fator XI, também observamos anormalidades no número e na função plaquetária. CONCLUSÕES: Anormalidades hemostáticas são observadas com certa freqüência em pacientes com síndrome de Noonan (30% em nossa amostra). Enfatizamos, portanto, a importância de uma investigação hematológica mais detalhada nesses pacientes, especialmente antes da realização de um procedimento invasivo, o qual é requerido com certa freqüência na síndrome.

OBJECTIVE: Noonan syndrome is a multiple congenital anomaly syndrome, and bleeding diathesis is considered part of the clinical findings. The purpose of this study was to determine the frequency of hemostatic abnormalities in a group of Noonan syndrome patients. METHOD: We studied 30 patients with clinical diagnosis of Noonan syndrome regarding their hemostatic status consisting of bleeding time, prothrombin time, activated partial thromboplastin time and thrombin time tests, a platelet count, and a quantitative determination of factor XI. RESULTS: An abnormal laboratory result was observed in 9 patients (30%). Although coagulation-factor deficiencies, especially factor XI deficiency, were the most common hematological findings, we also observed abnormalities of platelet count and function in our screening. CONCLUSIONS: Hemostatic abnormalities are found with some frequency in Noonan syndrome patients (30% in our sample). Therefore, we emphasize the importance of a more extensive hematological investigation in these patients, especially prior to an invasive procedure, which is required with some frequency in this disorder.

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