JCR Pharmaceuticals’ Data Presentations at SSIEM Annual Symposium 2024 Highlight Investigational Treatments for Lysosomal Storage Disorders
- Presentations Explain Potential Benefits of J-Brain Cargo® Technology in Delivering Biotherapeutics Across the Blood-
HYOGO,
"In treating lysosomal storage disorders, it's critical to address the neurological symptoms that often accompany these conditions,” said
JCR showcased the following two presentations:
JR-171: Mucopolysaccharidosis Type I (MPS I) Poster
The following poster presentation provides a case report for four individuals with MPS I who were treated with JR-171:
Neurobehavioural and somatic improvements observed in MPS I patients treated with lepunafusp alfa (JR-171): report of four cases (PO-238)
Presenter:
This study reports clinical data from four individuals with MPS I in
These cases illustrate the positive neuropsychiatric and behavioral changes observed during the Phase 1/2 study of JR-171, as well as the drug’s somatic efficacy, and they demonstrate its potential as an effective treatment for the somatic symptoms and neuronopathy found in individuals with MPS I. Further neurocognitive and developmental evaluation is required to consolidate and establish the efficacy of JR-171 for neuronopathic symptoms.
GM1 Gangliosidosis Poster
This poster presentation was selected as one of the highest-ranked posters. It highlights preclinical data from an adeno-associated virus (AAV) gene therapy in a mice model of GM1 gangliosidosis:
Gene therapy for GM1 gangliosidosis mediated by AAV vector carrying BBB-penetrable enzyme (PO-211)
Presenter:
This study reports preclinical data that demonstrated efficacy of AAV that expresses anti-transferrin receptor-antibody (anti-TfR antibody) fused β-galactosidase (TβGal). AAV was administered intravenously to the GM1 gangliosidosis mouse models. TβGal expressed in the liver was secreted into the blood and efficiently penetrated the central nervous system (CNS) as well as peripheral organs. Substrates in the CNS decreased in a dose-dependent manner. The data also demonstrated efficacy of TβGal in survival, histology, and behavioral evaluations. This therapeutic approach, which is the combination of AAV and anti-TfR antibody fused biotherapeutics, is expected to be applied for the treatment of several hereditary neurological diseases with CNS involvement. Further evaluation is required.
About the
Established in 1963, the aim of the society is to foster the study of inherited metabolic disorders and related topics. An international annual symposium is held to promote exchange of ideas between professional leaders in different disciplines who are interested in inborn errors of metabolism. Learn more about SSIEM: https://www.ssiem.org/.
About the J-Brain Cargo® Platform Technology
About Mucopolysaccharidosis I (Hurler, Hurler-Scheie, Scheie Syndrome)
Mucopolysaccharidosis I (MPS I) is an autosomal recessive lysosomal storage disorders (LSDs) caused by a deficiency of α-L-iduronidase, an enzyme that breaks down glycosaminoglycans (mucopolysaccharides) in the body. The current worldwide prevalence of MPS I is estimated to be approximately 3,000-4,000 (according to JCR internal research). MPS I gives rise to a wide range of somatic and neurological symptoms. A major limitation of current ERT is that it does not address central nervous system (CNS) symptoms because of the enzyme’s inability cross the blood-brain barrier (BBB). MPS I is the only LSD in which hematopoietic stem cell transplantation (HSCT) is part of the standard of case for the severe form of the disease. Significant unmet medical need persists in all forms of MPS I.
About GM1 Gangliosidosis
GM1 gangliosidosis is an autosomal recessive disease caused by pathogenic mutations in the GLB1 gene which results in dysfunction or lack of production of lysosomal enzyme, β-galactosidase, responsible for the breakdown of GM1 gangliosides and other glycolipids. Accumulation of GM1 gangliosides in multiple tissues including the brain leads to severe neurodegeneration and systemic disease manifestations resulting in premature mortality. GM1 gangliosidosis is classified into three forms (Type I to III) based on the age of onset of clinical symptoms.
About JR-171
JR-171 is a recombinant fusion protein of an antibody against the human transferrin receptor and α-L-iduronidase, the enzyme that is missing or malfunctioning in patients with MPS I. By crossing the blood brain-barrier (BBB) through transferrin receptor mediated transcytosis it is expected to be effective against central nervous system (CNS) signs and symptoms of the disease thereby addressing a significant unmet need for the treatment of MPS
About
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