Researchers from University College London and collaborating institutions have recently published results from their study aiming to optimize gene therapy for CLN5 disease.
Hunter syndrome, also called mucopolysaccharidosis II, is an X-linked genetic lysosomal disorder caused by loss-of-function mutations in the IDS gene, encoding iduronate-2-sulfatase (I2S). I2S is a lysosomal enzyme responsible for the cleavage of glycosaminoglycans (GAGs), and its deficiency results in accumulation of GAGs leading to a multisystemic disorder.
Friedreich’s ataxia (FA), the most common form of hereditary ataxia, is an autosomal recessive neurodegenerative disorder affecting multiple organ systems, and causing cardiomyopathy, scoliosis, muscle weakness, speech impairment and other systemic issues.
A new method, based on gene editing with oligonucleotides and functional analyses, identifies which variants of DNA repair genes associated with Lynch syndrome are truly harmful and which are not. Scientists at The Netherlands Cancer Institute have developed this technique and classified these gene variants in both coding and noncoding regions, distinguishing those that are pathogenic from those that are benign.
Leigh syndrome is a fatal pediatric neurodegenerative disorder caused by mitochondrial dysfunction, most often due to defects in the mitochondrial respiratory chain. The Ndufs4 knockout (Ndufs4 KO) mouse is an established model of the disease, as loss of the NDUFS4 subunit leads to complex I (CI) deficiency and reproduces the neurological decline and pathology seen in affected children. Researchers from The Children’s Hospital of Philadelphia Research Institute and collaborators described how NV-354, a water-soluble prodrug of succinate, may mitigate this mitochondrial dysfunction.
Charcot-Marie-Tooth (CMT) disease is a group of clinically and genetically heterogeneous sensorimotor peripheral neuropathies. It is the most frequent inherited neuromuscular disorder affecting 9.7-82.3 patients per 100,000 individuals. Over 100 genes with all patterns of inheritance have been linked to CMT. These genes encode proteins involved in nerve-specific processes, such as axonal transport, myelination and synaptic transmission, and in general housekeeping pathways. However, the reason underlying why defects in such ubiquitous proteins predominantly affect peripheral nerves remains unclear.
Dentatorubral-pallidoluysian atrophy (DRPLA) is a lethal neurodegenerative disorder caused by pathogenic expansion of CAG repeats within the atrophin-1 (ATN1) gene. As DRPLA belongs to the broader class of repeat expansion disorders (RED) that are driven by toxic gain-of-function effects, reduction or elimination of ATN1 expression is predicted to provide therapeutic benefit.
Neurotrimin (NTM) is a member of the IgLON family, the disruption of which has been tied to emotional learning deficits and anxiety-like behavior in animal models. A mutation in the NTM gene was found to disrupt NTM protein heterodimerization with other IgLON family members, suggesting a potential link between NTM dysfunction and neurodevelopmental and behavioral disorders.
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