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del Moral M, Loeck M, Muntimadugu E, Vives G, Pham V, Pfeifer P, Battaglia G, Muro S. Role of the Lactide:Glycolide Ratio in PLGA Nanoparticle Stability and Release under Lysosomal Conditions for Enzyme Replacement Therapy of Lysosomal Storage Disorders. J Funct Biomater 2023; 14:440. [PMID: 37754854 PMCID: PMC10531859 DOI: 10.3390/jfb14090440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 09/28/2023] Open
Abstract
Prior studies demonstrated that encapsulation in poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) enhanced the delivery of enzymes used for replacement therapy (ERT) of lysosomal storage disorders (LSDs). This study examined how the copolymer lactide:glycolide ratio impacts encapsulation, physicochemical characteristics, stability, and release under lysosomal conditions. Hyaluronidase, deficient in mucopolysaccharidosis IX, was encapsulated in NPs synthesized using 50:50, 60:40, or 75:25 lactide:glycolide copolymers. All NPs had diameters compatible with cellular transport (≤168 nm) and polydispersity indexes (≤0.16) and ζ-potentials (≤-35 mV) compatible with colloidal stability. Yet, their encapsulation efficiency varied, with 75:25 NPs and 60:40 NPs having the lowest and highest EE, respectively (15% vs. 28%). Under lysosomal conditions, the 50:50 copolymer degraded fastest (41% in 1 week), as expected, and the presence of a targeting antibody coat did not alter this result. Additionally, 60:40 NPs destabilized fastest (<1 week) because of their smaller diameter, and 75:25 NPs did not destabilize in 4 weeks. All formulations presented burst release under lysosomal conditions (56-78% of the original load within 30 min), with 50:50 and 60:40 NPs releasing an additional small fraction after week 1. This provided 4 weeks of sustained catalytic activity, sufficient to fully degrade a substrate. Altogether, the 60:40 NP formulation is preferred given its higher EE, and 50:50 NPs represent a valid alternative, while the highest stability of 75:25 NPs may impair lysosomes. These results can guide future studies aiming to translate PLGA NP-based ERT for this and other LSDs.
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Affiliation(s)
- Maria del Moral
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute for Science and Technology, 08028 Barcelona, Spain
- Applied Materials Chemistry Master Program (M.d.M) and Biomedicine Doctorate Program, University of Barcelona, 08007 Barcelona, Spain
| | - Maximilian Loeck
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute for Science and Technology, 08028 Barcelona, Spain
- Applied Materials Chemistry Master Program (M.d.M) and Biomedicine Doctorate Program, University of Barcelona, 08007 Barcelona, Spain
| | - Eameema Muntimadugu
- Institute for Bioscience and Biotechnology Research (IBBR), University of Maryland, College Park, MD 20742, USA
| | - Guillem Vives
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute for Science and Technology, 08028 Barcelona, Spain
- Nanoscience and Nanotechnology Degree Program, Autonomous University of Barcelona, 08193 Bellaterra, Spain
| | - Vy Pham
- Institute for Bioscience and Biotechnology Research (IBBR), University of Maryland, College Park, MD 20742, USA
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20742, USA
| | - Peter Pfeifer
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute for Science and Technology, 08028 Barcelona, Spain
| | - Giuseppe Battaglia
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute for Science and Technology, 08028 Barcelona, Spain
- Institution of Catalonia for Research and Advanced Studies (ICREA), 08010 Barcelona, Spain
| | - Silvia Muro
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute for Science and Technology, 08028 Barcelona, Spain
- Institute for Bioscience and Biotechnology Research (IBBR), University of Maryland, College Park, MD 20742, USA
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20742, USA
- Institution of Catalonia for Research and Advanced Studies (ICREA), 08010 Barcelona, Spain
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Boot RG, van Breemen MJ, Wegdam W, Sprenger RR, de Jong S, Speijer D, Hollak CEM, Van Dussen L, Hoefsloot HCJ, Smilde AK, De Koster CG, Vissers JPC, Aerts JMFG. Gaucher disease: a model disorder for biomarker discovery. Expert Rev Proteomics 2014; 6:411-9. [DOI: 10.1586/epr.09.54] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Aerts JMFG, Kallemeijn WW, Wegdam W, Joao Ferraz M, van Breemen MJ, Dekker N, Kramer G, Poorthuis BJ, Groener JEM, Cox-Brinkman J, Rombach SM, Hollak CEM, Linthorst GE, Witte MD, Gold H, van der Marel GA, Overkleeft HS, Boot RG. Biomarkers in the diagnosis of lysosomal storage disorders: proteins, lipids, and inhibodies. J Inherit Metab Dis 2011; 34:605-19. [PMID: 21445610 PMCID: PMC3109260 DOI: 10.1007/s10545-011-9308-6] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 01/21/2011] [Accepted: 02/17/2011] [Indexed: 12/23/2022]
Abstract
A biomarker is an analyte indicating the presence of a biological process linked to the clinical manifestations and outcome of a particular disease. In the case of lysosomal storage disorders (LSDs), primary and secondary accumulating metabolites or proteins specifically secreted by storage cells are good candidates for biomarkers. Clinical applications of biomarkers are found in improved diagnosis, monitoring disease progression, and assessing therapeutic correction. These are illustrated by reviewing the discovery and use of biomarkers for Gaucher disease and Fabry disease. In addition, recently developed chemical tools allowing specific visualization of enzymatically active lysosomal glucocerebrosidase are described. Such probes, coined inhibodies, offer entirely new possibilities for more sophisticated molecular diagnosis, enzyme replacement therapy monitoring, and fundamental research.
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Affiliation(s)
- Johannes M F G Aerts
- Sphinx-Amsterdam Lysosome Center, Departments of Medical Biochemistry and Internal Medicine, Academic Medical Centre, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands.
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Aerts JM, Boot RG, van Eijk M, Groener J, Bijl N, Lombardo E, Bietrix FM, Dekker N, Groen AK, Ottenhoff R, van Roomen C, Aten J, Serlie M, Langeveld M, Wennekes T, Overkleeft HS. Glycosphingolipids and insulin resistance. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 721:99-119. [PMID: 21910085 DOI: 10.1007/978-1-4614-0650-1_7] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Glycosphingolipids are structural membrane components, residing largely in the plasma membrane with their sugar-moieties exposed at the cell's surface. In recent times a crucial role for glycosphingolipids in insulin resistance has been proposed. A chronic state of insulin resistance is a rapidly increasing disease condition in Western and developing countries. It is considered to be the major underlying cause of the metabolic syndrome, a combination of metabolic abnormalities that increases the risk for an individual to develop Type 2 diabetes, obesity, cardiovascular disease, polycystic ovary syndrome and nonalcoholic fatty liver disease. As discussed in this chapter, the evidence for a direct regulatory interaction of glycosphingolipids with insulin signaling is still largely indirect. However, the recent finding in animal models that pharmacological reduction of glycosphingolipid biosynthesis ameliorates insulin resistance and prevents some manifestations of metabolic syndrome, supports the view that somehow glycosphingolipids act as critical regulators, Importantly, since reductions in glycosphingolipid biosynthesis have been found to be well tolerated, such approaches may have a therapeutic potential.
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Affiliation(s)
- Johannes M Aerts
- Department of Medical Biochemistry, University of Amsterdam, The Netherlands.
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5
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Wennekes T, van den Berg RJBHN, Boot RG, van der Marel GA, Overkleeft HS, Aerts JMFG. Glycosphingolipids--nature, function, and pharmacological modulation. Angew Chem Int Ed Engl 2010; 48:8848-69. [PMID: 19862781 DOI: 10.1002/anie.200902620] [Citation(s) in RCA: 218] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The discovery of the glycosphingolipids is generally attributed to Johan L. W. Thudichum, who in 1884 published on the chemical composition of the brain. In his studies he isolated several compounds from ethanolic brain extracts which he coined cerebrosides. He subjected one of these, phrenosin (now known as galactosylceramide), to acid hydrolysis, and this produced three distinct components. One he identified as a fatty acid and another proved to be an isomer of D-glucose, which is now known as D-galactose. The third component, with an "alkaloidal nature", presented "many enigmas" to Thudichum, and therefore he named it sphingosine, after the mythological riddle of the Sphinx. Today, sphingolipids and their glycosidated derivatives are the subjects of intense study aimed at elucidating their role in the structural integrity of the cell membrane, their participation in recognition and signaling events, and in particular their involvement in pathological processes that are at the basis of human disease (for example, sphingolipidoses and diabetes type 2). This Review details some of the recent findings on the biosynthesis, function, and degradation of glycosphingolipids in man, with a focus on the glycosphingolipid glucosylceramide. Special attention is paid to the clinical relevance of compounds directed at interfering with the factors responsible for glycosphingolipid metabolism.
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Affiliation(s)
- Tom Wennekes
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, Leiden, The Netherlands
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6
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Nanomolar affinity, iminosugar-based chemical probes for specific labeling of lysosomal glucocerebrosidase. Bioorg Med Chem 2010; 18:267-73. [DOI: 10.1016/j.bmc.2009.10.060] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Revised: 10/22/2009] [Accepted: 10/29/2009] [Indexed: 11/19/2022]
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Wennekes T, van den Berg R, Boot R, van der Marel G, Overkleeft H, Aerts J. Glycosphingolipide - Natur, Funktion und pharmakologische Modulierung. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200902620] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Heemstra HE, van Weely S, Büller HA, Leufkens HGM, de Vrueh RLA. Translation of rare disease research into orphan drug development: disease matters. Drug Discov Today 2009; 14:1166-73. [PMID: 19818412 DOI: 10.1016/j.drudis.2009.09.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2009] [Revised: 09/08/2009] [Accepted: 09/10/2009] [Indexed: 02/09/2023]
Abstract
More than 25 years of orphan drug regulations have yielded several new treatments for patients with rare diseases. Here, we show that successful translation of rare disease research into an orphan drug discovery and development programme is dependent on the disease class, its prevalence and the disease-specific scientific output. Our findings indicate that current orphan drug legislation alone is not sufficient to stimulate orphan drug development for diseases with a very low prevalence. Consequently, additional incentives should focus on stimulating the specific needs of rare disease research at disease class level.
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Affiliation(s)
- Harald E Heemstra
- Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands
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9
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Aerts JM, van Breemen MJ, Bussink AP, Ghauharali K, Sprenger R, Boot RG, Groener JE, Hollak CE, Maas M, Smit S, Hoefsloot HC, Smilde AK, Vissers JP, de Jong S, Speijer D, de Koster CG. Biomarkers for lysosomal storage disorders: identification and application as exemplified by chitotriosidase in Gaucher disease. Acta Paediatr 2008; 97:7-14. [PMID: 18339181 DOI: 10.1111/j.1651-2227.2007.00641.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
UNLABELLED A biomarker is an analyte that indicates the presence of a biological process linked to the clinical manifestations and outcome of a particular disease. An ideal biomarker provides indirect but ongoing determinations of disease activity. In the case of lysosomal storage disorders (LSDs), metabolites or proteins specifically secreted by storage cells are good candidates for biomarkers. Potential clinical applications of biomarkers are found in improved diagnosis, monitoring of disease progression and assessment of therapeutic correction. These applications are illustrated by reviewing the use of plasma chitotriosidase in the clinical management of patients with Gaucher disease, the most common LSD. The ongoing debate on the value of biomarkers in patient management is addressed. Novel analytical methods have revolutionized the identification and measurement of biomarkers at the protein and metabolite level. Recent developments in biomarker discovery by proteomics are described and the future for biomarkers of LSDs is discussed. CONCLUSION Besides direct applications for biomarkers in patient management, biomarker searches are likely to render new insights into pathophysiological mechanisms and metabolic adaptations, and may provide new targets for therapeutic intervention.
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Affiliation(s)
- Johannes M Aerts
- Clinical Proteomics Facility, Academic Medical Center, Amsterdam, The Netherlands.
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Bussink AP, van Eijk M, Renkema GH, Aerts JM, Boot RG. The biology of the Gaucher cell: the cradle of human chitinases. ACTA ACUST UNITED AC 2007; 252:71-128. [PMID: 16984816 DOI: 10.1016/s0074-7696(06)52001-7] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Gaucher disease (GD) is the most common lysosomal storage disorder and is caused by inherited deficiencies of glucocerebrosidase, the enzyme responsible for the lysosomal breakdown of the lipid glucosylceramide. GD is characterized by the accumulation of pathological, lipid laden macrophages, so-called Gaucher cells. Following the development of enzyme replacement therapy for GD, the search for suitable surrogate disease markers resulted in the identification of a thousand-fold increased chitinase activity in plasma from symptomatic Gaucher patients and that decreases upon successful therapeutic intervention. Biochemical investigations identified a single enzyme, named chitotriosidase, to be responsible for this activity. Chitotriosidase was found to be an excellent marker for lipid laden macrophages in Gaucher patients and is now widely used to assist clinical management of patients. In the wake of the identification of chitotriosidase, the presence of other members of the chitinase family in mammals was discovered. Amongst these is AMCase, an enzyme recently implicated in the pathogenesis of asthma. Chitinases are omnipresent throughout nature and are also produced by vertebrates in which they play important roles in defence against chitin-containing pathogens and in food processing.
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Affiliation(s)
- Anton P Bussink
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
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11
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Beyond the Primary Biochemical Defect in Type 1 Gaucher Disease. Clin Ther 2007. [DOI: 10.1016/s0149-2918(07)80455-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Aerts JMFG, Hollak CEM, Boot RG, Groener JEM, Maas M. Substrate reduction therapy of glycosphingolipid storage disorders. J Inherit Metab Dis 2006; 29:449-56. [PMID: 16763917 DOI: 10.1007/s10545-006-0272-5] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2005] [Accepted: 02/21/2006] [Indexed: 01/28/2023]
Abstract
In the last 15 years enormous progress has been made regarding therapy of type I Gaucher disease, a severely disabling disorder characterized by intralysosomal storage of glucosylceramide in tissue macrophages. Effective enzyme replacement therapy of type I Gaucher disease, based on chronic intravenous administration of mannose-terminated recombinant human glucocerebrosidase, has been available since 1990 and has been applied in several thousand patients without serious adverse effects. An alternative therapeutic approach, so-called substrate reduction therapy, is based on partial reduction of the synthesis of glucosylceramide and hence of subsequent metabolites. Oral administration of an inhibitor of glucosylceramide synthesis (N-butyldeoxynojirimycin, registered in Europe since 2002 as miglustat (Zavesca)), is effective in reversing clinical symptoms in type I Gaucher patients with mild to moderate disease manifestations. The growing long-term experience with substrate reduction therapy indicates that this treatment is also without major adverse effects. Substrate reduction therapy, in conjunction with enzyme replacement therapy, may play an important role in the future clinical management of patients suffering from type I Gaucher disease. Clinical trials are under way that should reveal the value of substrate reduction for maintenance therapy of type I Gaucher disease and for treatment of neuronopathic variants of Gaucher disease, Niemann-Pick disease type C, late-onset Tay-Sachs disease and Sandhoff disease.
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Affiliation(s)
- Johannes M F G Aerts
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ, Amsterdam, The Netherlands.
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13
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Aerts JM, Hollak C, Boot R, Groener A. Biochemistry of glycosphingolipid storage disorders: implications for therapeutic intervention. Philos Trans R Soc Lond B Biol Sci 2003; 358:905-14. [PMID: 12803924 PMCID: PMC1693181 DOI: 10.1098/rstb.2003.1273] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The physiological importance of the degradative processes in lysosomes is revealed by the existence of at least 40 distinct inherited diseases, the so-called lysosomal storage disorders. Most of these diseases are caused by a deficiency in a single lysosomal enzyme, or essential cofactor, and result in the lysosomal accumulation of one, or sometimes several, natural compounds. The most prevalent subgroup of the lysosomal storage disorders is formed by the sphingolipidoses, inherited disorders that are characterized by excessive accumulation of one or multiple (glyco)sphingolipids. The biology of glycosphingolipids has been extensively discussed in other contributions during this symposium. This review will therefore focus in depth on (type 1) Gaucher disease, a prototypical glycosphingolipidosis. The elucidation of the primary genetic defect, being a deficiency in the lysosomal glucocerebrosidase, is described. Characterization of glucocerebrosidase at protein and gene level has subsequently opened avenues for therapeutic intervention. The development of successful enzyme replacement therapy for type 1 Gaucher disease is discussed. Attention is also paid to the alternative approach of substrate modulation using orally administered inhibitors of glucosylceramide synthesis. Novel developments about the monitoring of age of onset, progression and correction of disease are described. The remaining challenges about pathophysiology of glycosphingolipidoses are discussed in view of further improvements in therapy for these debilitating disorders.
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Affiliation(s)
- Johannes M Aerts
- Department of Biochemistry and Internal Medicine, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands.
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14
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Pastores GM, Barnett NL. Substrate reduction therapy: miglustat as a remedy for symptomatic patients with Gaucher disease type 1. Expert Opin Investig Drugs 2003; 12:273-81. [PMID: 12556220 DOI: 10.1517/13543784.12.2.273] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Gaucher disease (GD) is an inborn error of glycosphingolipid metabolism, associated with multisystemic manifestations resulting from the lysosomal accumulation of an incompletely degraded material (glucosylceramide) within cells of monocyte/macrophage lineage. In the majority of GD patients with non-neurological involvement (type 1), the clinical features are dominated by haematological, visceral (hepatic and splenic) and skeletal complications. Infrequently, cardiopulmonary involvement may develop and lead to major morbidity. Investigations of substrate turnover within cellular compartments, such as the lysosome, indicate that progressive tissue storage occurs when the activity of the responsible hydrolytic enzyme declines. Thus, the provision of functional enzyme to deficient cells is a straightforward means of achieving metabolic correction. Conversely, the concentration of stored substrate within cells bearing particular affected enzymes (i.e., expressing residual activity) may be controlled by a reduction of the 'load'. This means that metabolic homeostasis can also be restored by restricting the amount of substrate presented to disease cells to a level that can be hydrolysed by the existing enzyme activity. Proof-of-concept for both approaches has been demonstrated through enzyme replacement therapy using alglucerase/imiglucerase and more recently, substrate reduction therapy by miglustat. Enzyme replacement therapy is proven to be safe and effective in the treatment of GD type 1, establishing imiglucerase as the current standard of care. The experience with substrate reduction therapy, specifically miglustat, is limited but encouraging. This review is an attempt to examine the potential role of this latter approach in light of current patient management. The consideration of miglustat as a therapeutic option requires the appropriate selection of patients (amongst those unwilling or unsuitable to receive enzyme replacement therapy), a definition of the therapeutic objectives and monitoring not only for response but potential adverse effects.
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Affiliation(s)
- Gregory M Pastores
- Neurogenetics Unit, Department of Neurology and Pediatrics, New York University School of Medicine, New York, USA.
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Wang ML, Maller E. A case of hepatosplenomegaly. PEDIATRIC CASE REVIEWS (PRINT) 2002; 2:79-86. [PMID: 12865684 DOI: 10.1097/00132584-200204000-00003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Mei-Lun Wang
- Fellow in Gastroenterology, Children's Hospital of Philadelphia, Philadelphia, PA; and Attending Physician in Gastroenterology, Children's Hospital of Philadelphia, Philadelphia, PA
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Boot RG, Hollak CE, Verhoek M, Sloof P, Poorthuis BJ, Kleijer WJ, Wevers RA, van Oers MH, Mannens MM, Aerts JM, van Weely S. Glucocerebrosidase genotype of Gaucher patients in The Netherlands: limitations in prognostic value. Hum Mutat 2000; 10:348-58. [PMID: 9375849 DOI: 10.1002/(sici)1098-1004(1997)10:5<348::aid-humu3>3.0.co;2-b] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Gaucher disease is a recessively inherited lysosomal storage disorder that is caused by a deficiency in glucocerebrosidase activity. The clinical expression is markedly heterogeneous with respect to age of onset, progression, severity, and neurological involvement. The relative incidence of glucocerebrosidase (GC) mutations has been studied extensively for Jewish but not for non-Jewish Caucasian patient populations. The present survey on mutant GC genotypes prevalent in Gaucher disease in The Netherlands was taken of 72 patients from different genetic backgrounds. This number is more than half the total number of affected Gaucher patients to be expected on the basis of the incidence of the disorder in this country. Analysis of nine GC mutations led to the identification of 74% of the mutant GC alleles in patients from 44 unrelated Dutch families (i.e., families that have lived in The Netherlands for at least several generations) and of 44% of the mutant GC alleles in patients from nine unrelated families that recently immigrated from both European and non-European countries. The N370S (cDNA 1226G) GC mutation proved to occur most frequently (41%) in the unrelated Dutch patients and less frequently (6%) in the unrelated immigrant patients and was always associated with the nonneuronopathic (Type 1) form of the disease. Apart from the association of the N370S mutation with Type 1 Gaucher disease, the prognostic value of GC genotyping was limited, since a particular GC genotype did not correlate closely to a specific clinical course, or to a specific relative responsiveness to enzyme-supplementation therapy.
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Affiliation(s)
- R G Boot
- Department of Biochemistry, Academic Medical Center, University of Amsterdam, The Netherlands
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Analysis of the β-Glucocerebrosidase Gene in Czech and Slovak Gaucher Patients: Mutation Profile and Description of Six Novel Mutant Alleles. Blood Cells Mol Dis 1999. [DOI: 10.1006/bcmd.1999.0256] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Beyer EM, Karpova EA, Udalova OV, Ploos van Amstel JK, van Diggelen OP, Tsvetkova IV. The multiple cases of Fabry disease in a Russian family caused by an E341K amino acid substitution in the alpha-galactosidase A. Clin Chim Acta 1999; 280:81-9. [PMID: 10090526 DOI: 10.1016/s0009-8981(98)00133-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A large Russian family with multiple cases of Fabry disease in several generations is presented. Fourteen family members were clinico-biochemically examined. Among 12 adult children (19-32 years old) of one couple, five sons manifested angiokeratotic skin lesions and other Fabry symptoms. Biochemical studies including an enzyme assay, the analysis of glycosphingolipid excretion and isoelectric focusing of a patient leukocyte extract allowed us to identify Fabry disease in four affected brothers and to establish the heterozygous status of their mother. The analysis of genomic DNA of four patients and their mother revealed a novel E341K missense mutation caused by a G to A transition (codon 341 GAA-AAA) in the alpha-galactosidase A gene.
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Affiliation(s)
- E M Beyer
- Institute of Biomedical Chemistry, Russian Academy of Medical Sciences, Moscow
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de Jong JG, Aerts JM, van Weely S, Hollak CE, van Pelt J, van Woerkom LM, Liebrand-van Sambeek ML, Wevers RA. Oligosaccharide excretion in adult Gaucher disease. J Inherit Metab Dis 1998; 21:49-59. [PMID: 9501269 DOI: 10.1023/a:1005311430722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Gaucher disease is a lysosomal storage disease characterized by storage of glucocerebroside due to lysosomal glucocerebrosidase deficiency. Increased urinary excretion of sialyloligosaccharides and mannosylglycoasparagines has been described for two patients with the infantile form of the disease, probably as a consequence of obstruction of lysosomal functioning due to the glycolipid accumulation in lysosomes. By thin-layer chromatography, we found increased urinary oligosaccharide excretion in a series of adult non-neuronopathic patients. Oligosaccharide patterns were comparable between patients and also with the pattern observed in infantile Gaucher disease. Composition was analysed by methanolysis and gas chromatography. Mannose and N-acetylglucosamine are the main carbohydrates in all oligosaccharide bands. A statistically significant correlation was found between oligosaccharide excretion and the severity of the disease expressed as severity score index. Patients treated with enzyme replacement therapy showed a reduction up to 65% of the original oligosaccharide excretion after 1 year of treatment, comparable with the reduction in spleen volume.
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Affiliation(s)
- J G de Jong
- Laboratory for Neurology and Pediatrics, University Hospital Nijmegen, The Netherlands
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Hrebícek M, Zeman J, Musilová J, Hodanová K, Renkema GH, Vepreková L, Ledvinová J, Hrebícek D, Sokolová J, Aerts JM, Elleder M. A case of type I Gaucher disease with cardiopulmonary amyloidosis and chitotriosidase deficiency. Virchows Arch 1996; 429:305-9. [PMID: 8972767 DOI: 10.1007/bf00198347] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Severe cardiopulmonary amyloidosis developed several months after a total splenectomy in a patient with type 1 Gaucher disease and led within a year to his death at 48 years of age. The autopsy findings were dominated by extensive pulmonary and cardiac amyloid infiltration. No Gaucher cells were found in the lungs. Aside from a glucocerebrosidase deficiency the patient was also deficient in chitotriosidase, an enzyme whose activity is usually greatly increased in the serum of Gaucher patients. Analysis of mutations in the glucocerebrosidase gene revealed heterozygosity for N370S and D409H mutations. The normal amount of glucocerebrosidase was found in the spleen by Western blotting. We suggest that amyloidosis should be considered in the differential diagnosis of severe cardiopulmonary disease in Gaucher patients.
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Affiliation(s)
- M Hrebícek
- Institute of Inherited Metabolic Diseases, First Medical Faculty, Charles University, Praha 2, Czech Republic
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