MLD is a rare, fatal genetic disorder caused by a mutation in the gene responsible for encoding the enzyme arylsulfatase A (ARSA) leading to neurological damage and developmental regression. In its most severe form, babies develop normally but in late infancy start to rapidly lose the ability to walk, talk and interact with the world around them. These children may require 24-hour care, and the majority pass away within five years of disease onset, creating an enormous burden on patients, their families and health care systems.
Libmeldy aims to correct the underlying genetic cause of MLD by inserting a working copy of the ARSA gene into the genome of a patients’ own HSCs. The genetically modified cells are infused back into the patient, where they can naturally migrate across the blood-brain barrier into the central nervous system, engraft, and express the functional enzyme. This approach has the potential to persistently restore enzymatic function with a single treatment. In clinical trials, treatment with Libmeldy resulted in the preservation of cognitive development and maintenance of motor function past ages at which untreated patients showed severe cognitive and motor impairments. With more than a cumulative 250 patient-years of follow-up, Libmeldy was generally well-tolerated, with no treatment-related serious adverse events or deaths. Most adverse events were associated with busulfan conditioning or background disease.
“Today’s approval of Libmeldy in
Libmeldy was previously approved by the
About MLD
MLD is a rare and life-threatening inherited disease of the body’s metabolic system estimated to occur in approximately one in every 100,000 live births based on existing literature. MLD is caused by a mutation in the arylsulfatase-A (ARSA) gene that results in the accumulation of sulfatides in the brain and other areas of the body, including the liver, gallbladder, kidneys, and/or spleen. Over time, the nervous system is damaged, leading to neurological problems such as motor, behavioral and cognitive regression, severe spasticity and seizures. Patients with MLD gradually lose the ability to move, talk, swallow, eat and see. In its late infantile form, mortality at five years from onset is estimated at 50 percent and 44 percent at 10 years for juvenile patients.i
About Libmeldy / OTL-200
Libmeldy (atidarsagene autotemcel), also known as OTL-200, has been approved by the
The most common adverse reaction attributed to treatment with Libmeldy was the occurrence of anti-ARSA antibodies. In addition to the risks associated with the gene therapy, treatment with Libmeldy is preceded by other medical interventions, namely peripheral blood mobilization and apheresis, followed by myeloablative conditioning, which carry their own risks. During the clinical studies of Libmeldy, the safety profiles of these interventions were consistent with their known safety and tolerability.
For more information about Libmeldy, please see the Summary of Product Characteristics (SmPC) available on the EMA website.
Libmeldy is approved in the
Libmeldy was developed in partnership with the
About
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In 2018, the company acquired GSK’s rare disease gene therapy portfolio, which originated from a pioneering collaboration between GSK and the
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iMahmood et al. Metachromatic Leukodystrophy: A Case of Triplets with the Late Infantile Variant and a Systematic Review of the Literature.
ContactBenjamin Navon +1 857-248-9454 Benjamin.Navon@orchard-tx.com
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