Consulta: creatorFacets:"Leistner-Segal,Sandra"
Registros recuperados: 6
Data/hora: 09/06/2024 07:23:44

Mucopolysaccharidoses in northern Brazil: Targeted mutation screening and urinary glycosaminoglycan excretion in patients undergoing enzyme replacement therapy
Provedor de dados: 74
Autores: Viana,Gustavo M.; Lima,Nathália O. de; Cavaleiro,Rosely; Alves,Erik; Souza,Isabel C.N.; Feio,Raimunda; Leistner-Segal,Sandra; Schwartz,Ida; Giugliani,Roberto; Silva,Luiz C. Santana da.
Mucopolysaccharidoses (MPS) are rare lysosomal disorders caused by the deficiency of specific lysosomal enzymes responsible for glycosaminoglycan (GAG) degradation. Enzyme Replacement Therapy (ERT) has been shown to reduce accumulation and urinary excretion of GAG, and to improve some of the patients' clinical signs. We studied biochemical and molecular characteristics of nine MPS patients (two MPS I, four MPS II and three MPS VI) undergoing ERT in northern Brazil. The responsiveness of ERT was evaluated through urinary GAG excretion measurements. Patients were screened for eight common MPS mutations, using PCR, restriction enzyme tests and direct sequencing. Two MPS I patients had the previously reported mutation p.P533R. In the MPS II patients, mutation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mucopolysaccharidosis; Enzyme replacement therapy; Mutations; Glycosaminoglycans.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300007

Information and Diagnosis Networks – tools to improve diagnosis and treatment for patients with rare genetic diseases
Provedor de dados: 74
Autores: Vieira,Taiane Alves; Trapp,Franciele Barbosa; Souza,Carolina Fischinger Moura de; Faccini,Lavínia Schuler; Jardim,Laura Bannach; Schwartz,Ida Vanessa Doederlein; Riegel,Mariluce; Vargas,Carmen Regla; Burin,Maira Graeff; Leistner-Segal,Sandra; Ashton-Prolla,Patrícia; Giugliani,Roberto.
Abstract Brazil is a country of continental dimensions and most genetic services are concentrated in the Southeast and South, including the Medical Genetics Service of the Hospital de Clínicas de Porto Alegre (MGS/HCPA). As many areas on the country do not have adequate medical genetics support, networks were designed to extend the service of the MGS/HCPA reference center. This paper presents the information and diagnosis networks that have their headquarters at MGS/HCPA: SIAT (National Information System on Teratogenic Agents), SIEM (Information Service on Inborn Errors of Metabolism), Alô Genética (Hello Genetics - Medical Genetics Information Service for Primary Health Care Professionals); Rede MPS Brasil (MPS-Mucopolysaccharidosis Brazil Network); Rede...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Information services; Medical Genetics; Diagnostic networks; Rare diseases; Reference centers.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000200155

Prenatal diagnosis of fetal chromosomal abnormalities: report of an 18-year experience in a Brazilian public hospital
Provedor de dados: 74
Autores: Kessler,Rejane G.; Sanseverino,Maria Teresa V.; Leistner-Segal,Sandra; Magalhães,José A.A.; Giugliani,Roberto.
The study of the fetal karyotype became an important tool for the fetal diagnosis of genetic diseases in the 1970s. Although application of this test has remained very restricted in Brazil, we had 905 referrals for prenatal fetal karyotyping between 1989 and 2007. In 879 cases, a fetal karyotype was obtained. We detected 74 abnormal karyotypes (8.4%), the majority being found when the prior indication was fetal malformation. When obtaining amniotic fluid or chorionic villus samples was difficult, alternative fetal materials (urine, cystic hygroma, cystic lung, intreperitoneal and cerebrospinal fluids) were collected and we had success in obtaining karyotypes in all 13 cases. Although, the option of terminating abnormal pregnancies does not legally exist in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prenatal diagnosis; Chromosomal abnormalities; Fetal malformations.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500004

Phenotype-oriented NGS panels for mucopolysaccharidoses: Validation and potential use in the diagnostic flowchart
Provedor de dados: 74
Autores: Brusius-Facchin,Ana Carolina; Siebert,Marina; Leão,Delva; Malaga,Diana Rojas; Pasqualim,Gabriela; Trapp,Franciele; Matte,Ursula; Giugliani,Roberto; Leistner-Segal,Sandra.
Abstract Mucopolysaccharidosis (MPS) are a group of rare genetic disorders caused by deficiency in the activity of specific lysosomal enzymes required for the degradation of glycosaminoglycans (GAGs). A defect in the activity of these enzymes will result in the abnormal accumulation of GAGs inside the lysosomes of most cells, inducing progressive cellular damage and multiple organ failure. DNA samples from 70 patients with biochemical diagnosis of different MPSs genotypes confirmed by Sanger sequencing were used to evaluate a Next Generation Sequencing (NGS) protocol. Eleven genes related to MPSs were divided into three different panels according to the clinical phenotype. This strategy led to the identification of several pathogenic mutations distributed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lysosomal storage disease; Mucopolysaccharidoses; Next generation sequencing; Target sequence; Mutation detection.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000200207

Prevalence of 185delAG and 5382insC mutations in BRCA1, and 6174delT in BRCA2 in women of Ashkenazi Jewish origin in southern Brazil
Provedor de dados: 74
Autores: Dillenburg,Crisle Vignol; Bandeira,Isabel Cristina; Tubino,Taiana Valente; Rossato,Luciana Grazziotin; Dias,Eleonora Souza; Bittelbrunn,Ana Cristina; Leistner-Segal,Sandra.
Certain mutations in BRCA1 and BRCA2 genes are frequent in the Ashkenazi Jewish population. Several factors contribute to this increased frequency, including consanguineous marriages and an event known as a "bottleneck', which occurred in the past and caused a drastic reduction in the genetic variability of this population. Several studies were performed over the years in an attempt to elucidate the role of BRCA1 and BRCA2 genes in susceptibility to breast cancer. The aim of this study was to estimate the carrier frequency of certain common mutations in the BRCA1 (185delAG and 5382insC) and BRCA2 (6174delT) genes in an Ashkenazi Jewish population from Porto Alegre, Brazil. Molecular analyses were done by PCR followed by RFLP (ACRS). The carrier frequencies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ashkenazi Jews; Breast cancer; BRCA1; BRCA2; Mutation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000400009

Population medical genetics: translating science to the community
Provedor de dados: 74
Autores: Giugliani,Roberto; Bender,Fernanda; Couto,Rowena; Bochernitsan,Aline; Brusius-Facchin,Ana Carolina; Burin,Maira; Amorim,Tatiana; Acosta,Angelina Xavier; Purificação,Antônio; Leistner-Segal,Sandra; Saraiva-Pereira,Maria Luiza; Jardim,Laura Bannach; Matte,Ursula; Riegel,Mariluce; Cardoso-dos-Santos,Augusto César; Rodrigues,Graziella; Oliveira,Marcelo Zagonel de; Tagliani-Ribeiro,Alice; Heck,Selia; Dresch,Vanusa; Schuler-Faccini,Lavínia; Kubaski,Francyne.
Abstract Rare genetic disorders are currently in the spotlight due to the elevated number of different conditions and significant total number of affected patients. The study of these disorders is extremely helpful for the elucidation of physiological processes related with complex disorders. Isolated populations are instrumental for the study of genetic disorders, considering their homogeneity and high proportion of affected patients in a small geographic area. These favorable conditions lead to the creation of a new discipline, known as “population medical genetics”, which integrates medical genetics, population genetics, epidemiological genetics and community genetics. In order to develop practical activities in this new discipline, the National...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Population Medical Genetics; Genetic clusters; Founder effect; Population isolates.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000200312