Результаты поиска

Clinical management of female patients with Fabry disease based on expert consensus.

Fabry disease is an X-linked lysosomal storage disorder that causes accumulation of glycosphingolipids in body tissues and fluids, leading to progressive organ damage and life-threatening complications. It can affect both males and females and can be classified into classic or later-onset phenotypes. The disease severity in females ranges from asymptomatic to the more severe, classic phenotype. Most females are hemizygous and the X-linked inheritance is associated with variable X-activation pattern and residual enzymatic activity. The heterogeneity of clinical presentation in females requires …

An expert consensus on the recommendations for the use of biomarkers in Fabry disease.

Fabry disease is an X-linked lysosomal storage disorder caused by the accumulation of glycosphingolipids in various tissues and body fluids, leading to progressive organ damage and life-threatening complications. Phenotypic classification is based on disease progression and severity and can be used to predict outcomes. Patients with a classic Fabry phenotype have little to no residual α-Gal A activity and have widespread organ involvement, whereas patients with a later-onset phenotype have residual α-Gal A activity and disease progression can be limited to a single organ, often the heart. Diag…

Glb1 knockout mouse model shares natural history with type II GM1 gangliosidosis patients.

GM1 gangliosidosis is a rare lysosomal storage disorder affecting multiple organ systems, primarily the central nervous system, and is cause … ma which we also observed in GM1 gangliosidosis patients. Glb1-/- mice also exhibit accumulation of glycosphingolipids in the brain with increases in GM1 and GA1 beginning by 8 weeks. Surprisingly, despite being a null variant, this Glb1-/- mouse most closely models the less severe type II disease and will guide the development of new therapies for patients with the …

Identification of a Novel Acid Sphingomyelinase Activity Associated with Recombinant Human Acid Ceramidase.

Acid ceramidase (AC) is a lysosomal enzyme required to hydrolyze ceramide to sphingosine by the removal of the fatty acid moiety. An inherit … ne, and a deacylase activity that removes fatty acids from complex lipids such as sphingomyelin and glycosphingolipids. A close association of AC with another important enzyme of sphingolipid metabolism, acid sphingomyelinase (ASM), has also been observed. Herein, we used a highly purified recombinant human AC (rhAC) and novel UPLC-based assay methods to investigate …

Niemann-Pick type C disease with a novel intronic mutation: three Turkish cases from the same family.

OBJECTIVES: Niemann-Pick type C (NPC) disease is a rare progressive neurodegenerative condition that is characterized by the accumulation of cholesterol, glycosphingolipids, and sphingosine in lysosomes. Patients have various systemic and neurological findings depending on their age at onset. This disease is caused by the autosomal recessive transmission of mutations in the NPC1 and NPC2 genes; patients have mutations mainly in the NPC1 gene (95%) and the majority of them are point mutations located in the exonic regions. CASE PRESENTATION: Here, we presented three cousins with hepatosplenome…

HSP90 inhibitors reduce cholesterol storage in Niemann-Pick type C1 mutant fibroblasts.

Niemann-Pick type C1 (NPC1) disease is a lysosomal lipid storage disorder caused by mutations of the NPC1 gene. More than 300 disease-associated mutations are reported in patients, resulting in abnormal accumulation of unesterified cholesterol, glycosphingolipids, and other lipids in late endosomes and lysosomes (LE/Ly) of many cell types. Previously, we showed that treatment of many different NPC1 mutant fibroblasts with histone deacetylase inhibitors resulted in reduction of cholesterol storage, and we found that this was associated with enhanced exit of the NPC1 protein from the endoplasmic…

Chemical inhibition of β-glucocerebrosidase does not affect phagocytosis and early containment of Leishmania by murine macrophages.

Gaucher disease is a lysosomal storage disease in which a genetic deficiency in β-glucocerebrosidase leads to the accumulation of glycosphingolipids in lysosomes. Macrophages are amongst the cells most severely affected in Gaucher disease patients. One phenotype associated with Gaucher macrophages is the impaired capacity to fight bacterial infections. Here, we investigate whether inhibition of β-glucocerebrosidase activity affects the capacity of macrophages to phagocytose and act on the early containment of human pathogens of the genus Leishmania. Towards our aim, we performed in vitro infec…

Sudden onset of nephrotic syndrome in an asymptomatic Fabry patient: a case report.

BACKGROUND: Fabry disease (FD) is an X-linked lysosomal storage disorder caused by the mutation of the GLA gene, encoding the α-galactosidase, which is responsible for the catabolism of neutral glycosphingolipids. Microalbuminuria or low-grade proteinuria, and continuously progressive renal failure are common manifestations in FD males. However, sudden onset of nephrotic syndrome in FD, is rarely reported. CASE REPORT: A 32-year-old Chinese man was admitted to our hospital because of sudden onset of generalized edema due to nephrotic syndrome. He denied hypohidrosis, nocturia, and any history…

Molecular basis for a new bovine model of Niemann-Pick type C disease.

Niemann-Pick type C disease is a lysosomal storage disease affecting primarily the nervous system that results in premature death. Here we p … additionally confirmed via biochemical analysis of Lysotracker Green, cholesterol, sphingosine and glycosphingolipids in fibroblast cell cultures originating from two affected calves. The identification of a novel missense variant for Niemann-Pick type C disease in Angus/Angus-cross cattle will enable improved breeding and management of this disease in at-risk popu …

[Fabry disease].

Fabry disease, also known as Anderson-Fabry disease or angiokeratoma corporis diffusum universale, is an X-linked recessive form of sphingolipidosis caused by total or partial deficiency of the lysosomal hydrolase, alpha-galactosidase A. From the youngest age, it results in a gradual ubiquitous build-up of glycosphingolipids that are not degraded by the missing enzyme. Cutaneous, neurological, nephrologic, cardiac, gastrointestinal, ophthalmological, respiratory, cochleovestibular and haematological involvement are responsible for increased mortality and significant impairment of quality of li…

Alterations in membrane trafficking and pathophysiological implications in lysosomal storage disorders.

Lysosomal storage disorders are a heterogeneous group of more than 50 distinct inborn metabolic diseases affecting about 1 in 5000 to 7000 live births. The diseases often result from mutations followed by functional deficiencies of enzymes or transporters within the acidic environment of the lysosome, which mediate the degradation of a wide subset of substrates, including glycosphingolipids, glycosaminoglycans, cholesterol, glycogen, oligosaccharides, peptides and glycoproteins, or the export of the respective degradation products from the lysosomes. The progressive accumulation of uncleaved s…

Time to treatment benefit for adult patients with Fabry disease receiving agalsidase β: data from the Fabry Registry.

BACKGROUND: Agalsidase β is a form of enzyme replacement therapy for Fabry disease, a genetic disorder characterised by low α-galactosidase A activity, accumulation of glycosphingolipids and life-threatening cardiovascular, renal and cerebrovascular events. In clinical trials, agalsidase β cleared glycolipid deposits from endothelial cells within 6 months; clearance from other cell types required sustained treatment. We hypothesised that there might be a 'lag time' to clinical benefit after initiating agalsidase β treatment, and analysed the incidence of severe clinical events over time in pat…

Pharmacologic Treatment Assigned for Niemann Pick Type C1 Disease Partly Changes Behavioral Traits in Wild-Type Mice.

Niemann-Pick Type C1 (NPC1) is an autosomal recessive inherited disorder characterized by accumulation of cholesterol and glycosphingolipids. Previously, we demonstrated that BALB/c-npc1nihNpc1-/- mice treated with miglustat, cyclodextrin and allopregnanolone generally performed better than untreated Npc1-/- animals. Unexpectedly, they also seemed to accomplish motor tests better than their sham-treated wild-type littermates. However, combination-treated mutant mice displayed worse cognition performance compared to sham-treated ones. To evaluate effects of these drugs in healthy BALB/c mice, w…

Long-term enzyme replacement therapy for Fabry disease: efficacy and unmet needs in cardiac and renal outcomes.

Fabry disease is a progressive lysosomal storage disease caused by alpha-galactosidase A deficiency. This condition is characterized by progressive accumulation of glycosphingolipids with functional impairment in various organs, including the kidney, heart and cerebrovascular system. Enzyme replacement therapy (ERT) is essential because it attenuates the disease progression. The present study investigated the long-term efficacy of ERT in 19 Korean Fabry patients (11 adult males, 4 symptomatic female carriers and 4 pediatric males) who had received ERT for 8.1±2.2 years (range, 5.3-10.5 years).…

Dissecting the Role of Anti-ganglioside Antibodies in Guillain-Barré Syndrome: an Animal Model Approach.

Guillain-Barré syndrome (GBS) is an autoimmune polyneuropathy disease affecting the peripheral nervous system (PNS). Most of the GBS patients experienced neurological symptoms such as paresthesia, weakness, pain, and areflexia. There are also combinations of non-neurological symptoms which include upper respiratory tract infection and diarrhea. One of the major causes of GBS is due largely to the autoantibodies against gangliosides located on the peripheral nerves. Gangliosides are sialic acid-bearing glycosphingolipids consisting of a ceramide lipid anchor with one or more sialic acids attach…

Nanodiscs and electrospray ionization mass spectrometry: a tool for screening glycolipids against proteins.

Electrospray ionization-mass spectrometry (ESI-MS) is extensively employed to detect and quantify protein-carbohydrate interactions in vitro … ilize glycolipids and mimic their natural cellular environment, suitable for screening libraries of glycosphingolipids (GSL) against proteins to identify specific interactions and to rank their relative affinities. Using the B subunit homopentamers of cholera toxin and heat labile toxin as model GSL-binding proteins, the CaR-ESI-MS was applied to NDs containing mixt …

Fabry disease peripheral blood immune cells release inflammatory cytokines: role of globotriaosylceramide.

Fabry disease is an X-linked lysosomal disorder (LD) due to deficiency of the enzyme α-galactosidase A (αGal), which leads to the accumulation of neutral glycosphingolipids, mainly globotriaosylceramide (Gb3). Several mechanisms contribute to the diverse physiopathological alterations observed in this disease, and it has been suggested that an underlying proinflammatory state could play a significant role. The aim of this study is to investigate the presence of a proinflammatory state in the different subsets of peripheral blood mononuclear cells (PBMC) and to understand the mechanisms that co…

Pasteurella multocida Heddleston serovar 3 and 4 strains share a common lipopolysaccharide biosynthesis locus but display both inter- and intrastrain lipopolysaccharide heterogeneity.

Pasteurella multocida is a Gram-negative multispecies pathogen and the causative agent of fowl cholera, a serious disease of poultry which c … ously, and three LPS outer core structures are remarkably similar to the globo series of vertebrate glycosphingolipids. Our in-depth analysis showing the genetics and full range of P. multocida lipopolysaccharide structures will facilitate the improvement of typing systems and the prediction of the protective efficacy of vaccines.

Принимающая биогенезная техника HDL используется для включения клеток, инфицированных хламидией, и регулирует хламидиальный рост.

Хламидийный трахоматис является обязательным внутриклеточным бактериальным патогеном, который является наиболее распространенной причиной венерических бактериальных инфекций и является этиологическим агентом трахомы, главной причиной предотвратимой слепоты. Этот организм заражает эпителиальные клетки гениального тракта и век, что приводит к губительной провокационной реакции. Хламидия трахоматис растет в вакуоле, называемом включением, и ее рост зависит от множества факторов, включая липиды. Хотя при приобретении C. trachomatis холестерина и гликоспинопидов в принимающих камерах используется ц

Совпадение в аннотации оригинала
Chlamydia trachomatis is an obligate intracellular bacterial pathogen that is the most common cause of sexually transmitted bacterial infect … pids. Although a variety of mechanisms are involved in the acquisition of host cell cholesterol and glycosphingolipids by C. trachomatis, none of the previously documented pathways for lipid acquisition are absolutely required for growth. Here we demonstrate that multiple components of the host high-density lipoprotein (HDL) biogenesis machinery including the lipid …

Synergy between the pharmacological chaperone 1-deoxygalactonojirimycin and the human recombinant alpha-galactosidase A in cultured fibroblasts from patients with Fabry disease.

Fabry disease (FD) is an X-linked inherited disease due to alpha-galactosidase A (alpha-Gal A) deficiency and characterized by lysosomal storage of globotriaosylceramide (Gb3) and related neutral glycosphingolipids. Storage of these substrates results in multisystem manifestations, including renal failure, cardiomyopathy, premature myocardial infarctions, stroke, chronic neuronopathic pain, gastrointestinal disturbances, and skin angiokeratoma. Enzyme replacement therapy (ERT) with recombinant human alpha-galactosidase A (rh-alpha-Gal A) is now available for the treatment of FD and in most pat…