Alzheimer’s disease (AD) is a progressive neurodegenerative disorder characterized by synaptic dysfunction, neuronal loss and the accumulation of amyloid plaques and neurofibrillary tangles, ultimately leading to cognitive decline. Despite significant research efforts, no existing treatment has proven effective enough to stop or reverse the progression of the disease.

The lack of animal models that mimic human disease impedes the study of many pathologies that still lack treatment beyond symptom relief. This is what has happened so far with PURA syndrome, a rare disorder affecting brain development for which a mouse model has finally been developed. Other times, small and large models exist, but an effective treatment remains elusive, as is the case with Krabbe disease, a fatal disease in children that could be prevented with the advances in gene therapy.

A collaboration of scientists from the NIH Brain Initiative consortium has published eight simultaneous studies in Neuron, Cell, Cell Genomics, Cell Reports and Cell Reports Methods, with the results of the Armamentarium project, a new set of gene therapy tools for the research and treatment of human brain disorders. The methodology, based on genetic techniques, RNA detection, genomic enhancers and viral vectors, is designed to access different CNS cell types, neuronal and non-neuronal cells, with common and reproducible protocols now available for any laboratory.

Since the development of the base and prime editing technique by David Liu at the Broad Institute, their applications in biomedicine have continued to grow, reaching 17 clinical trials for base editing and one clinical assay for prime editing. The 28th Annual Meeting of the American Society of Gene & Cell Therapy (ASGCT) marked a historic milestone this year by presenting the first case of treatment with base editors of a baby with a deadly metabolic disease.

Capsida Biotherapeutics Inc. has reported development of a systematically administered capsid, CAP-004.

Gene and cell therapies (GCTs) can target the kidney to treat congenital, acute or chronic diseases affecting this organ. However, its complex structure poses a challenge for these technologies. To be precise and effective in the long term, new approaches should circumvent the specificities of renal tissue, with novel methods of delivery and gene transfer to offer new therapeutic options for patients who lack them.

Metabolic disorders such as argininosuccinic and glutaric aciduria, methylmalonic acidemia, homocystinuria or primary hyperoxaluria require specific diets to prevent the accumulation of substances that the body can’t process. Current treatments mainly focus on managing symptoms and metabolite levels, and do not always prevent the progressive deterioration caused by mutations associated with the condition. However, emerging gene therapies hold promise for transforming these diseases by targeting their underlying causes, as presented in the oral abstract session, “Gene and cell therapy for metabolic diseases” of the ongoing 28th Annual Meeting of the American Society of Gene & Cell Therapy (ASGCT) meeting in New Orleans.

Mavrix Bio has received IND clearance from the FDA for MVX-220, an investigational AAV gene therapy for the treatment of Angelman syndrome. The company expects to initiate its first-in-human study, ASCEND-AS, in the second half of this year.