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Background: Leigh syndrome spectrum (LSS) is a novel nomenclature that encompasses both classical Leigh syndrome and Leigh-like phenotypes. Given the heterogeneity of disease presentation, a new consensus published recently addressed the main issues and proposed general guidelines towards diagnosis. Based on these recommendations, we developed a simple pipeline that can be useful in the diagnosis of LSS.
Methods: We combined previously published criteria with our own experience to achieve a diagnostic framework that can provide faster satisfactory results with fewer resources.
Results: We suggest adding basic biochemical tests for amino acids, acylcarnitine, and urinary organic acids as parallel investigations, as these results can be obtained in a short time. This approach characterized 80% of our cohort and promoted specific intervention in 10% of confirmed cases.
Conclusions: Genetic studies are crucial in the diagnosis of LSS, but they are time-consuming and might delay tailored interventions. Therefore, we suggest adding more affordable and less complex biochemical studies as primary tests when investigating treatable causes of LSS.
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http://dx.doi.org/10.3390/diagnostics14192133 | DOI Listing |
Mol Ther Methods Clin Dev
September 2025
Department of Pediatrics, UT Southwestern Medical Center, Dallas, TX 75390, USA.
Surfeit locus protein 1 (SURF1)-related Leigh syndrome is an early-onset neurodegenerative disorder characterized by a reduction in complex IV activity that disrupts mitochondrial function. Currently, there are no disease-modifying treatments available. Previously, we reported that a gene replacement therapy for -related Leigh syndrome was developed, which showed improved complex IV activity and restored exercise-induced lactate acidosis, as well as a high safety profile in wild-type (WT) mice.
View Article and Find Full Text PDFMov Disord
August 2025
Department of Neurology, University Hospital, LMU Munich, Munich, Germany.
Background: Clinical progression rate is the typical primary endpoint measure in progressive supranuclear palsy (PSP) clinical trials.
Objectives: This longitudinal multicohort study investigated whether baseline clinical severity and regional brain atrophy could predict clinical progression in PSP-Richardson's syndrome (PSP-RS).
Methods: PSP-RS patients (n = 309) from the placebo arms of clinical trials (NCT03068468, NCT01110720, NCT02985879, NCT01049399) and DescribePSP cohort were included.
Life (Basel)
July 2025
Department of Pediatrics, Saitama Medical University Hospital, Moroyama, Saitama 350-0495, Japan.
An explorative study was conducted to evaluate the efficacy and safety of 5-aminolevulinic acid hydrochloride combined with sodium ferrous citrate (SPP-004) in 10 pediatric patients with Leigh syndrome (LS) aged 3-24 months in 10 institutions between December 2014 and July 2019. The patients were randomized and allocated to the SPP-004 or placebo group for a 12-week double-blind period, followed by a 12-week open-label period with SPP-004 and then a long-term study of up to 180 weeks. The efficacy and safety were evaluated using the Newcastle Pediatric Mitochondrial Disease Scale (NPMDS) and adverse events (AEs), respectively.
View Article and Find Full Text PDFJ Gerontol A Biol Sci Med Sci
August 2025
Blavatnik Institute, Dept. of Genetics, Paul F. Glenn Center for Biology of Aging Research at Harvard Medical School, Boston, MA 02115 USA.
Biological age refers to a person's overall health in aging, as distinct from their chronological age. Diverse measures of biological age, referred to as "clocks", have been developed in recent years and enable risk assessments, and an estimation of the efficacy of longevity interventions in animals and humans. While most clocks are trained to predict chronological age, clocks have been developed to predict more complex composite biological age outcomes, at least in humans.
View Article and Find Full Text PDFInt J Audiol
August 2025
Space Medicine Innovations Laboratory, Geisel School of Medicine at Dartmouth, Hanover, NH, USA.
Objective: Central auditory tests (CATs) typically target children aged six and older and are not included in paediatric cognitive assessment. CATs have shown significant correlations with neurocognitive processing ability in adults. Whether children under six can reliably complete CATs or if CAT performance correlates with cognitive ability in children with normal hearing is unclear.
View Article and Find Full Text PDF