Gene therapy in advanced metachromatic leukodystrophy: tempering expectations
Author Information
Author(s): Schoenmakers Daphne H, Beerepoot Shanice, Adang Laura A, Asbreuk Marije A B C, Bergner Caroline G, Bley Annette E, Boelens Jaap-Jan, Calbi Valeria, Darling Alejandra, Eklund Erik, García Cazorla Ángeles, Grønborg Sabine W, Groeschel Samuel, van Hasselt Peter M, Hollak Carla E M, Horgan Claire, Jones Simon, de Koning Tom, Laugwitz Lucia, Lindemans Caroline, Martin Pascal, Mochel Fanny, Øberg Andreas, Ram Dipak, Sevin Caroline, Schöls Ludger, Zerem Ayelet, Wolf Nicole I, Fumagalli Francesca
Primary Institution: Amsterdam UMC, Vrije Universiteit Amsterdam
Hypothesis
Can gene therapy provide clinical benefits in patients with advanced symptomatic metachromatic leukodystrophy?
Conclusion
The study's claims of improvement from gene therapy in advanced MLD patients are questionable and lack sufficient detail to assess efficacy and safety.
Supporting Evidence
- Two of the three patients presented were already clearly affected at the time of treatment.
- The article lacks crucial details, such as detailed inclusion criteria defining 'advanced disease status.'
- Previous research emphasizes that severe nervous system damage is irreversible.
- The impressive improvement from GMFC-MLD level 4 to level 0 in MLD01 is questionable.
- Treatment before developing central nervous system symptoms is generally followed by good clinical outcomes.
- Newborn screening is the best option to identify patients in time for successful treatment.
Takeaway
This study looked at gene therapy for a rare disease, but the results might give false hope because they don't have enough information to prove it works.
Potential Biases
The claims may foster false hope among patients and families due to significant gaps in data.
Limitations
The study lacks crucial details such as inclusion criteria for advanced disease status and the total number of treated patients.
Participant Demographics
Three patients with metachromatic leukodystrophy, two with advanced symptoms and one diagnosed pre-symptomatically.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website