Elisa Leão Teles

• MD
• Head of Department at Centro Hospitalar de São João

Purpose Maroteaux–Lamy syndrome (MPSVI) is a rare lysosomal storage disorder caused by an Arylsulfatase B ( ARSB ) deficiency, leading to dermatan sulfate and chondroitin-4-sulfate accumulation. It manifests various systemic clinical features. Enzyme Replacement Therapy with Galsulfase (Naglazyme) manages systemic symptoms, but ocular manifestation...

Arginase 1 deficiency (ARG1‐D) is an ultrarare, metabolic disease which may cause spastic paraplegia, cognitive deficiency, seizures, and ultimately severe disability. The aim of this study was to assess disease burden in ARG1‐D by performing a cross‐sectional survey of patients with ARG1‐D and their caregivers in four European countries (France, P...

Introduction: Mucopolysaccharidosis type VI (MPS VI) is a rare inherited metabolic disorder, primarily attributed to the deficiency of the enzyme N-acetylgalactosamine-4-sulfatase, responsible for the degradation of dermatan sulfate and chondroitin-4-sulfate. Therefore, there is a widespread accumulation of partially degraded glycosaminoglycans. Co...

Classic galactosemia (CG, OMIM #230400, ORPHA: 79,239) is a hereditary disorder of galactose metabolism that, despite treatment with galactose restriction, affects brain function in 85% of the patients. Problems with cognitive function, neuropsychological/social emotional difficulties, neurological symptoms, and abnormalities in neuroimaging and el...

Glucose homeostasis is essential for energy production and the central nervous system function, depending on glycogen metabolism. Glycogen storage diseases (GSD) are caused by enzymatic defects of the glycogen degradation and mainly involve the liver since the inhibition of hepatic glycogen breakdown results in its excessive storage and hepatomegal...

Mucopolysaccharidoses (MPSs) are rare inherited lysosomal storage diseases (LSDs) caused by deficient activity in one of the enzymes responsible for glycosaminoglycans lysosomal degradation. MPS II is caused by pathogenic mutations in the IDS gene, leading to deficient activity of the enzyme iduronate-2-sulfatase, which causes dermatan and heparan...

Mucopolysaccharidoses (MPSs) are rare inherited lysosomal storage diseases (LSDs) caused by deficient activity in one of the enzymes responsible for glycosaminoglycans lysosomal degradation. MPS II is caused by pathogenic mutations in the IDS gene, leading to deficient activity of the enzyme iduronate-2-sulfatase, which causes dermatan and heparan...

Background Mitochondrial diseases are a group of rare inborn metabolic disorders with multi-systemic manifestations. MTO1 gene mutations are associated with MTO1 (Mitochondrial tRNA Translation Optimization 1) protein deficiency, a mitochondrial disorder, which commonly presents with lactic acidosis and hypertrophic cardiomyopathy. Case presentati...

Mucopolysaccharidosis (MPS) VI is a rare genetic disease characterized by deficient activity of N‐acetylgalactosamine 4‐sulfatase, leading to the systemic deposition of glycosaminoglycans. Ocular involvement is classically characterized by progressive corneal clouding, ocular hypertension (OHT), and optic neuropathy. Although corneal clouding can b...

Purpose: The study aimed to define the genotypic and phenotypic spectrum of reversible acute liver failure (ALF) of infancy resulting from biallelic pathogenic TRMU variants and to determine the role of cysteine supplementation in its treatment. Methods: Individuals with biallelic (likely) pathogenic variants in TRMU were studied through an inte...

Assessing public and patients’ expectations and concerns about genomic data sharing is essential to promote adequate data governance and engagement in rare diseases genomics research. This cross-sectional study compared the views of 159 rare disease patients, 478 informal carers and 63 healthcare professionals in Northern Portugal about the benefit...

Mucopolysaccharidosis (MPS) disorders are a group of rare, progressive lysosomal storage diseases characterized by the accumulation of glycosaminoglycans (GAGs) and classified according to the deficient enzyme. Enzyme replacement therapy of MPS VI has limited effects on ophthalmic, cardiovascular, and skeletal systems. Odiparcil is an orally-availa...

Background The implications of sharing one's health data are far-reaching. Potential applications of health data range from the delivery of treatments tailored to individuals' characteristics to improvements in public health, while also posing concerns about privacy, social justice and equity. Making informed decisions about health data sharing thu...

The electron-transfer flavoprotein dehydrogenase gene (ETFDH) encodes the ETF-ubiquinone oxidoreductase (ETF-QO) and has been reported to be the major cause of multiple acyl-CoA dehydrogenase deficiency (MADD). In this study, we present the clinical and molecular diagnostic challenges, at the DNA and RNA levels, involved in establishing the genotyp...

Introduction International policy imperatives for the public and patient involvement in the governance of health data coexist with conflicting cross-border policies on data sharing. This can challenge the planning and implementation of participatory data governance in healthcare services locally. Engaging with local stakeholders and understanding h...

Introduction: Classical homocystinuria (HCU) is an autosomal recessive disorder caused by a deficiency in the cystathionine beta-synthase enzyme and associated with a high probability of vascular complications. Herein is presented the case of an adolescent diagnosed with HCU during cerebral venous sinus thrombosis (CVST) study. Case Report: A 14-y...

Recently, a disorder caused by the heterozygous de novo c.1267C>T (p.R423*) substitution in SLC37A4 has been described. This causes mislocalization of the glucose‐6‐phosphate transporter to the Golgi leading to a congenital disorder of glycosylation type II (SLC37A4‐CDG). Only one patient has been reported showing liver disease that improved with a...

Background Hyperargininemia, in patients with Arginase 1 Deficiency (ARG1‐D) is considered a key driver of disease manifestations, including spasticity, developmental delay, and seizures. Pegzilarginase (AEB1102) is an investigational enzyme therapy which is being developed as a novel arginine lowering approach Methods We report the safety and eff...

Objective To describe the clinical, biochemical, and genetic features of both new and previously reported patients with congenital disorders of glycosylation (CDG) diagnosed in Portugal over the last 20 years. Study design The cohort includes patients with an unexplained multisystem or single organ involvement, with or without psychomotor disabili...

Public involvement in the governance of epidemiological and public health studies can foster needs-driven research, enhance participants’ recruitment, reduce attrition and improve the quality of and ethics in research and surveillance. However, it can also reinforce health inequalities if it fails to ensure public representation across socioeconomi...

Background Health systems are moving towards a personalisation of care. Personalised care relies on data-intensive research, which depends on active participation by citizens in data generation and information sharing. Collecting and sharing one's data for research can deliver several benefits. However, it also comes at a cost in time and effort th...

Background: Niemann-Pick type C (NPC, MIM #257220) is a neuro-visceral disease, caused predominantly by pathogenic variants in the NPC1 gene. Here we studied patients with clinical diagnosis of NPC but inconclusive results regarding the molecular analysis. Methods: We used a Next-Generation Sequencing (NGS)-panel followed by cDNA analysis. Latte...

Low protein diet and sodium or glycerol phenylbutyrate, two pillars of recommended long-term therapy of individuals with urea cycle disorders (UCDs), involve the risk of iatrogenic growth failure. Limited evidence-based studies hamper our knowledge on the long-term effects of the proposed medical management in individuals with UCDs. We studied the...

Objective: To evaluate the impact of galsulfase enzyme replacement therapy (ERT) when initiated in adulthood for patients with mucopolysaccharidosis (MPS) VI. Methods: In 2005, the multi-national, MPS VI Clinical Surveillance Program (CSP) was established to collect long-term observational data from routine clinical and laboratory assessments. A...

The lysosome has a key role in the presentation of lipid antigens by CD1 molecules. While defects in lipid antigen presentation and in invariant Natural Killer T (iNKT) cell response were detected in several mouse models of lysosomal storage diseases (LSD), the impact of lysosomal engorgement in human lipid antigen presentation is poorly characteri...

Mitochondrial diseases (MD) are a group of rare inherited disorders, characterized by phenotypic heterogeneity, with hitherto no effective therapeutic options. The aim of this study was to develop a next generation sequencing (NGS) strategy, by using a custom gene panel and whole mitochondrial genome, to identify the disease causing pathogenic vari...

Objective To evaluate impact of galsulfase enzyme replacement therapy in patients with mucopolysaccharidosis (MPS) VI with phenotypes at either end of the disease spectrum. Methods The MPS VI Clinical Surveillance Program (CSP) was established to collect long‐term observational data from routine clinical and laboratory assessments. A sub‐analysis...

Background To improve our understanding of urea cycle disorders (UCDs) prospectively followed by two North American (NA) and European (EU) patient cohorts. Aims Description of the NA and EU patient samples and investigation of the prospects of combined and comparative analyses for individuals with UCDs. Methods Retrieval and comparison of the dat...

Purpose To assess how the current practice of newborn screening (NBS) for homocystinurias compares with published recommendations. Methods Twenty‐two of 32 NBS programmes from 18 countries screened for at least one form of homocystinuria. Centres provided pseudonymised NBS data from patients with cystathionine beta‐synthase deficiency (CBSD, n = 1...

Objective Citrullinemia type 1 (CTLN1) is an inherited metabolic disease affecting the brain which is detectable by newborn screening. The clinical spectrum is highly variable including individuals with lethal hyperammonemic encephalopathy in the newborn period and individuals with a mild‐to‐moderate or asymptomatic disease course. Since the phenot...

Background: To improve our understanding of urea cycle disorders (UCDs) prospectively followed by two North American (NA) and European (EU) patient cohorts. Aims: Description of the NA and EU patient samples and investigation of the prospects of combined and comparative analyses for individuals with UCDs. Methods: Retrieval and comparison of t...

Purpose: To assess how the current practice of newborn screening (NBS) for homocystinurias compares with published recommendations. Methods: Twenty-two of 32 NBS programmes from 18 countries screened for at least one form of homocystinuria. Centres provided pseudonymised NBS data from patients with cystathionine beta-synthase deficiency (CBSD, n...

Introduction: Combined oxidative phosphorylation deficiency 20 (COXPD20) is a mitochondrial respiratory chain complex (RC) disorder, caused by disease-causing variants in the VARS2 gene, which encodes a mitochondrial aminoacyl-tRNA synthetase. Here we describe a patient with fatal mitochondrial encephalopathy caused by a homozygous VARS2 gene miss...

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Mucopolysaccharidosis VI (MPS VI) is a progressive lysosomal storage disorder with multiorgan and multisystemic pathology. Currently, galsulfase enzyme replacement therapy (ERT) is the only approved treatment for MPS VI. A cross-sectional survey study of 121 patients with MPS VI conducted in 2001 to 2002 and a 10-year follow-up study of the same pa...

https://www.amazon.es/Odontopediatria-Portuguese-David-Casimiro-Andrade-ebook/dp/B0772WT4HM/ref=sr_1_3?ie=UTF8&qid=1520250867&sr=8-3&keywords=odontopediatria Uma ferramenta ideal para Médicos Dentistas, estudantes de Medicina Dentária, e outros interessados na área da Saúde Oral, Textos Escolhidos de Odontopediatria satisfaz a necessidade de inform...

Mucopolysaccharidosis (MPS) VI is an autosomal recessive lysosomal storage disorder arising from deficient activity of N-acetylgalactosamine-4-sulfatase (arylsulfatase B) and subsequent intracellular accumulation of the glycosaminoglycans (GAGs) dermatan sulfate and chondroitin-4-sulfate. Manifestations are multi-systemic and include skeletal abnor...

Rhabdomyolysis (RM) is characterized by acute and often severe skeletal muscle damage resulting in myoglobinuria and, in severe cases, acute renal failure [1]. In adults is typically due to trauma, intoxication or infection, whereas in children is frequently associated with inherited muscle disorders [2]. LPIN1 mutations were identified as a cause...

Background Patients with urea cycle disorders (UCDs) have an increased risk of neurological disease manifestation. Aims Determining the effect of diagnostic and therapeutic interventions on the neurological outcome. Methods Evaluation of baseline, regular follow-up and emergency visits of 456 UCD patients prospectively followed between 2011 and 201...

The clinical presentation of patients with organic acidurias (OAD) and urea cycle disorders (UCD) is variable; symptoms are often non-specific. To improve the knowledge about OAD and UCD the E-IMD consortium established a web-based patient registry. We registered 795 patients with OAD (n = 452) and UCD (n = 343), with ornithine transcarbamylase (OT...

The disease course and long-term outcome of patients with organic acidurias (OAD) and urea cycle disorders (UCD) are incompletely understood. To evaluate the complex clinical phenotype of OAD and UCD patients at different ages. Acquired microcephaly and movement disorders were common in OAD and UCD highlighting that the brain is the major organ inv...

BACKGROUND: The clinical presentation of patients with organic acidurias (OAD) and urea cycle disorders (UCD) is variable; symptoms are often non-specific. AIMS/METHODS: To improve the knowledge about OAD and UCD the E-IMD consortium established a web-based patient registry. RESULTS: We registered 795 patients with OAD (n = 452) and UCD (n = 343),...

OBJECTIVE: Patients with mucopolysaccharidosis present several alterations of the stomatognathic complex, however, no data is available on saliva biochemistry and yeast colonization. The aim of the study was to evaluate caries experience as well as saliva biochemistry and microbiology parameters in patients with mucopolysaccharidosis. METHOD: The...

BACKGROUND: The disease course and long-term outcome of patients with organic acidurias (OAD) and urea cycle disorders (UCD) are incompletely understood. AIMS: To evaluate the complex clinical phenotype of OAD and UCD patients at different ages. RESULTS: Acquired microcephaly and movement disorders were common in OAD and UCD highlighting that the b...

Mucopolysaccharidosis VI (MPS VI) is a clinically heterogeneous and progressive disorder with multiorgan manifestations caused by deficient N-acetylylgalactosamine-4-sulfatase activity. A cross-sectional Survey Study in individuals (n = 121) affected with MPS VI was conducted between 2001 and 2002 to establish demographics, urinary glycosaminoglyca...

Dilated cardiomyopathy is the most common form of cardiomyopathy in the paediatric population and an important cause of heart transplantation in children. The clinical profile and course of dilated cardiomyopathy in children have been poorly characterised. A retrospective review of 61 patients (37 female; 24 male) diagnosed with dilated cardiomyopa...

Medium-chain acyl-CoA dehydrogenase deficiency (MCADD) is the most common inherited defect in the mitochondrial fatty acid oxidation pathway, resulting in significant morbidity and mortality in undiagnosed patients.Newborn screening (NBS) has considerably improved MCADD outcome, but the risk of complication remains in some patients. The aim of this...

Medium-chain acyl-CoA dehydrogenase deficiency (MCADD) is the commonest genetic defect of mitochondrial fatty acid ß-oxidation. About 60% of MCADD patients are homozygous for the c.985A>G (p.Lys329Glu) mutation in the ACADM gene (G985 allele). Herein we present the first report on the molecular and biochemical spectrum of Portuguese MCADD populatio...

Trimethylaminuria (TMAu) or "fish odour syndrome" is a metabolic disorder characterized by the inability to convert malodorous dietary-derived trimethylamine (TMA) to odorless TMA N-oxide by the flavin-containing monooxygenase 3 (FMO3). Affected individuals unable to complete this reaction exude a "fishy" body odour due to the secretion of TMA in t...

Classic galactosemia is an autosomal recessive disorder caused by deficient galactose-1-phosphate uridylyltransferase (GALT) activity. Patients develop symptoms in the neonatal period, which can be ameliorated by dietary restriction of galactose. Many patients develop long-term complications, with a broad range of clinical symptoms whose pathophysi...

Characteristic cardiac valve abnormalities and left ventricular hypertrophy are present in untreated patients with mucopolysaccharidosis type VI (MPS VI). Cardiac ultrasound was performed to investigate these findings in subjects during long-term enzyme replacement therapy (ERT) with recombinant human arylsulfatase B (rhASB, rhN-acetylgalactosamine...

Carpal tunnel syndrome in children is uncommon. Mucopolysaccharidosis is the most common cause of carpal syndrome in this age group. With the new treatment available for mucopolysaccharidosis, the progression of this disease has greatly decreased, and all its musculoskeletal manifestations now assume more importance in the global treatment of these...

OBJECTIVE: To outline the design, baseline data, and 5-year follow-up data of patients with mucopolysaccharidosis (MPS) VI enrolled in the Clinical Surveillance Program (CSP), a voluntary, multinational, observational program. METHODS: The MPS VI CSP was opened in 2005 to collect, for at least 15 years, observational data from standard clinical and...

Mucopolysaccharidosis type II (MPS II) is a rare, life-limiting, X-linked recessive disease characterised by deficiency of the lysosomal enzyme iduronate-2-sulfatase. Consequent accumulation of glycosaminoglycans leads to pathological changes in multiple body systems. Age at onset, signs and symptoms, and disease progression are heterogeneous, and...

Short-chain 3-hydroxyacyl-CoA dehydrogenase (HADH, SCHAD) deficiency (OMIM #231530) represents a recently described disorder of mitochondrial fatty acid beta-oxidation, with less than ten cases described worldwide. The main clinical presentation of this metabolic disease is different from other inherited defects of fatty acid β-oxidation as the hyp...

Resumen: La Tirosinemia tipo I es una enfermedad potencialmente letal si no se diagnostica y trata adecuadamente. Los avances diagnóstico terapéuticos en los últimos años han mejorado ostensiblemente el pronóstico de estos pacientes.Por ello es importante que el pediatra disponga de una guía de práctica clínica con recomendaciones para el diagnósti...

Tyrosinemia type I is a potentially lethal disease if not diagnosed and treated properly. Diagnostic and therapeutic advances in recent years have significantly improved the prognosis for these patients. It is therefore important that the pediatrician has a clinical practice guideline with recommendations for diagnosis and treatment of this disease...

Maple syrup urine disease is an autosomal recessive disorder of branched-chain amino acids metabolism with a worldwide frequency of 1/185,000 live newborns. In Portugal, the incidence of the disease has not been assessed. Based on the review of the cases diagnosed by tandem mass spectrometry an incidence of 1/86,800 live newborns was estimated in P...

Pulmonary function is impaired in untreated mucopolysaccharidosis type VI (MPS VI). Pulmonary function was studied in patients during long-term enzyme replacement therapy (ERT) with recombinant human arylsulfatase B (rhASB; rhN-acetylgalactosamine 4-sulfatase). Pulmonary function tests prior to and for up to 240 weeks of weekly infusions of rhASB a...

Background and Methods: Growth failure is characteristic of untreated mucopolysaccharidosis type VI (MPS VI: Maroteaux-Lamy syndrome). Growth was studied in fifty-six MPS VI patients (5 to 29 years old) prior to and for up to 240 weeks of weekly infusions of recombinant human arylsulfatase B (rhASB) at 1 mg/kg during Phase 1/2, Phase 2, Phase 3 or...

The mucopolysaccharidoses (MPS) represent a group of inheritable, clinically heterogeneous lysosomal storage disorders, in which progressive accumulation of glycosaminoglycans (GAGs) can affect organs and tissues all over the body. The current paper discusses the skeletal X-ray and neuroimaging findings in MPS patients, and the imaging techniques t...

The European Journal of Human Genetics is the official Journal of the European Society of Human Genetics, publishing high-quality, original research papers, short reports, News and Commentary articles and reviews in the rapidly expanding field of human genetics and genomics.

Introdução: A Vanishing White Matter Disease (VWMD) é uma leucoencefalopatia de transmissão autossómica recessiva descrita recentemente. Caracteriza-se por apresentar fenótipo variável, apesar da ataxia e dos sinais piramidais, com relativa preservação da capacidade cognitiva, serem achados constantes. Existe caracteristicamente agravamento clínico...

The conserved oligomeric Golgi (COG) complex is a hetero-octameric complex essential for normal glycosylation and intra-Golgi transport. An increasing number of congenital disorder of glycosylation type II (CDG-II) mutations are found in COG subunits indicating its importance in glycosylation. We report a new CDG-II patient harbouring a p.R729W mis...

A 39-year-old male with classical Anderson-Fabry disease (AFD) and long-standing idiopathic splenomegaly, who had been on haemodialysis since the age of 24, was splenectomised for symptomatic pancytopaenia. Spleen enlargement was first noted at clinical presentation, at age 16, but despite thorough investigation its cause remained unclear. Anaemia,...

To delineate a new syndrome of brain dysgenesis and cutis laxa based on the description of 11 patients belonging to nine unrelated families recruited through an international collaboration effort. Careful clinical assessment of patients from birth to the age of 23 years with follow-up studies ranging from 3 to 20 years. Biochemical studies of serum...

Unlabelled: The objective of this study was to evaluate the long-term clinical benefits and safety of recombinant human arylsulfatase B (rhASB) treatment of mucopolysaccharidosis type VI (MPS VI: Maroteaux-Lamy syndrome), a lysosomal storage disease. Fifty-six patients derived from 3 clinical studies were followed in open-label extension studies f...

Maple syrup urine disease (MSUD) is an autosomal recessive disorder, caused by the defective function of the branched-chain alpha-ketoacid dehydrogenase complex (BCKD). BCKD is a mitochondrial complex, encoded by four nuclear genes (BCKDHA, BCKDHB, DBT and DLD), involved in the metabolism of branched-chain amino acids (BCAAs). Since the MSUD mutati...

Methylmalonic aciduria (MMA) and homocystinuria, cblC type (MIM 277400) is the most frequent inborn error of vitamin B(12). The recent identification of the disease gene, MMACHC, has permitted preliminary genotype-phenotype correlations. We studied 24 Italian and 17 Portuguese patients with cblC defect to illustrate the spectrum of mutations in a s...

We identified loss-of-function mutations in