Percorrer por autor "Diogo, Luisa"
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- Biochemical data as important clues for diagnosis of SUCLA2 defectsPublication . Nogueira, Célia; Garcia, Paula; Diogo, Luisa; Valongo, Carla; Santorelli, Filippo; Vilarinho, Laura
- Early diagnosis of acid sphingomyelinase deficiency (ASMD) through biomarkers analysisPublication . Neiva, Raquel; da Silva Gaspar, Paulo Jorge Miranda; Sousa e Silva, Lisbeth Elena; Gonçalves, I.; Ferreira, S.; Diogo, Luisa; Vilarinho, LauraIntroduction: Acid sphingomyelinase deficiency (ASMD), historically known as Niemann–Pick disease (NPD) types A, A/B, and B, is a rare, progressive, potentially fatal lysosomal storage disease caused by pathogenic variants in SMPD1 gene. It presents a wide spectrum of symptoms, age of onset, and degree and type of organ effected. The disease manifestations frequently involve hepatosplenomegaly with progressive organ dysfunction, interstitial lung disease, and bleeding. In this work, we will present a patient whose lysosomal biomarkers study allowed the diagnosis of ASMD. Methods: This patient had hepatosplenomegaly, elevated transaminases in which the primary clinical suspicion was an acid lipase deficiency. By the analysis of our multiplex biomarker panel by LC-MS/MS analysis, we were able to do a differential diagnosis. Results/Case report: The lysosphingomyelin (lysoSM) and lysosphingomyelin-509 (lysoSm-509) were approximately 100 a 150x than normal, suggestive of Niemann–Pick disease. The diagnosis of ASMD was confirmed by reduced acid sphingomyelinase enzyme activity measured in peripheral blood leukocytes and the presence of a pathogenic variant in both alleles in the SMPD1 gene. Conclusion: ASMD can be underestimate and the diagnostic odissey arise from an overlap in symptomology with other diseases, including primary hepatic disease, Gaucher disease, Niemann–Pick disease, and lysosomal acid lipase deficiency. The multiplex biomarker panel, with different lysolipids, allows simultaneously diagnosis of different LSDs, in a timely manner, leading to an early intervention, before the appearance of more deleterious symtpoms.
- Early Diagnosis of Mucopolysaccharidoses in PediatricsPublication . da Silva Gaspar, Paulo Jorge Miranda; Neiva, Raquel; Sousa e Silva, Lisbeth Elena; Diogo, Luisa; Ferreira, A.; Miranda, A.; Ribeiro, S.; Antunes, D.; Garcia, P.; Rodrigues, E.; Campos, T.; Janeiro, P.; Lopes, Altina; Pereira, Cristina; Nogueira, Célia; Sousa, S.; Ferreira, S.; Alves, Sandra; Leão Teles, Elisa; Vilarinho, LauraIntroduction: Mucopolysaccharidoses (MPSs) are a group of Lysosomal Storage Disorders with multisystem involvement, presenting different degrees of severity and evolution. At early disease stages and late onset forms, diagnosis can be postponed for years or even missed. The FIND PROJECT was designed to claim awareness to the redflags of MPSs at pediatric age and to provide a useful tool for physicians to diagnose these pathologies, since most of them are amenable to enzyme replacement therapy.
- Find Project: Results of 8 YearsPublication . da Silva Gaspar, Paulo Jorge Miranda; Neiva, Raquel; Sousa e Silva, Lisbeth Elena; Guimarães, Fábio; Diogo, Luisa; Ferreia, Ana Cristina; Miranda, Ana; Antunes, Diana; Louro, Pedro; Ribeiro, Sara; Garcia, Paula; Rodrigues, Esmeralda; Campos, Teresa; Janeiro, Patrícia; Sousa, Sérgio; Ferreira, Sara; Silva, Carmen; Lopes, Altina; Pereira, Cristina; Nogueira, Célia; Alves, Sandra; Leão Teles, Elisa; Vilarinho, LauraIntrodução e Objectivos: Mucopolysaccharidoses (MPSs) are a group of Lysosomal Storage Disorders with multisystem involvement, presenting different degrees of severity and evolution. At early disease stages and late onset forms, diagnosis can be postponed for years or even missed. The FIND PROJECT was designed to claim awareness to the red flags of MPSs at pediatric age and to provide an useful tool for physicians to diagnose these pathologies, since most of them are amenable to enzyme replacement therapy.
- Identification of novel L2HGDH gene mutations and update of the pathological spectrumPublication . Vilarinho, Laura; Tafulo, Sandra; Sibilio, Michelina; Kok, Fernando; Fontana, Federica; Diogo, Luisa; Venâncio, Margarida; Ferreira, Mariana; Nogueira, Celia; Valongo, Carla; Parenti, Giancarlo; Amorim, António; Azevedo, LuisaL-2-hydroxyglutaric aciduria (L-2-HGA, MIM 236792) is a neurometabolic disorder caused by the toxic accumulation of high concentration of L-2-hydroxyglutaric acid in plasma and cerebrospinal fluid. Distinct mutations on the L2HGDH gene have been associated with the clinical and biochemical phenotype. Here we present three novel mutations (Gln197X, Gly211Val and c.540+1 G4A), which increase the present deleterious collection of L2HGDH gene up to 35 mutations that we have compiled in this study. In addition, we used the haplotypic information based on polymorphic markers to demonstrate the common origin of Gly57Arg harboring chromosomes.
- A Multiplex Biomarker panel: A powerful tool for LSDs DiagnosisPublication . Neiva, Raquel; da Silva Gaspar, Paulo Jorge Miranda; Sousa e Silva, Lisbeth Elena; Gonçalves, Isabel; Ferreira, Sara; Diogo, Luisa; Vilarinho, LauraIntrodução / Descrição do Caso: Lysosomal Storage Disorders (DLSs) are a set of rare, chronic and multisystemic pathologies with a variable mode of presentation and severity. Acid sphingomyelinase deficiency (ASMD), historically known as Niemann–Pick disease (NPD) types A, A/B, and B, is a rare, progressive, potentially fatal lysosomal storage disease caused by pathogenic variants in SMPD1 gene. The disease manifestations frequently involve hepatosplenomegaly with progressive organ dysfunction, interstitial lung disease, and bleeding. The cellular damage caused by sphingomyelin accumulation can be irreversible and can lead to life-threatening complications with reduced life expectancy. ASMD can be underestimate and the diagnostic odyssey arise from an overlap in symptomology with other diseases, including primary hepatic disease, Gaucher disease, NPC, and lysosomal acid lipase deficiency.
- A novel missense mutation in SUCLA2 associated with mild methylmalonic aciduriaPublication . Nogueira, Célia; Garcia, Paula; Diogo, Luisa; Valongo, Carla; Santorelli, Filippo; Vilarinho, LauraIntroduction Succinyl CoA synthase is a mitochondrial matrix enzyme that catalyzes the reversible synthesis of succinate and ATP or GTP from succinyl-CoA and ADP in the tricarboxylic acid cycle (TCA). This enzyme is made up of two subunits, α and β, encoded by SUCLG1 and SUCLA2, respectively. The clinical features of patients with mutations in SUCLA2 include early childhood hypotonia, developmental delay, and almost invariably, progressive dystonia and sensorineural deafness. Mutations in SUCLA2 and SUCLG1 cause an encephalomyopathic form of infantile mtDNA depletion syndrome. A useful diagnostic clue in succinyl CoA synthase disorders is a ‘‘mildly’’ elevated urinary methylmalonic acid (MMA), and presence of TCA intermediates. To date, two patients with SUCLG1 mutations have been reported, whereas mutations in SUCLA2 have been reported in 17 patients. We here present an additional patient with a novel SUCLA2 mutation. Methods We report a 17-month-old-boy, who presented severe muscular hypotonia, failure to thrive, developmental delay, weight loss during a gastroenteritis crises, dysmorphisms and muscular atrophy. A clinical investigation disclosed hyperlactacidemia together with moderate excretion of MMA and elevated C4-dicarboxylic carnitine. Sequencing analysis of SUCLA2 and SUCLG1 was performed using standard methods. Results Mutation analysis of SUCLA2 revealed a homozygous c.985A>G mutation in exon 8 (p.M329V). This missense mutation affects an amino acid that is highly conserved in different species and was not found in controls. The analysis by bioinformatics tools also confirmed a pathogenic mutation. Discussion The clinical and biochemical phenotype of our patient is strikingly similar to other reported patients with SUCLA2 mutations. In addition, the mildly elevated levels of methylmalonate and lactate raised the suspicion of this disease. Our study contributed to expand the spectrum of patients with SUCLA2 mutations, and will be important for an accurate genetic counseling and a prenatal diagnosis to the affected family.
- Projet FIND - the first yearPublication . Gaspar, Paulo; alves, sandra; Teles, Elisa Leão; Diogo, Luisa; Vilarinho, LauraThe first year of the project FIND about Lysosomal Storage Disorders.