ArticleBrain : a journal of neurology2015
Alteration of ornithine metabolism leads to dominant and recessive hereditary spastic paraplegia.
Article in Brain : a journal of neurology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.
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53 citing papers in PubMed, 103 citations in OpenAlex.
- Novel mutations in the ALDH18A1 gene in complicated hereditary spastic paraplegia with cerebellar ataxia and cognitive impairment.Journal of human genetics · 2018Trial
- Hereditary Congenital Cataract With Spastic Paraplegia Associated With a Missense PAX6 Variant (p.Arg26Trp).Cureus · 2026Article
- Genetic variants among patients with motor neuron disease in Lithuania - a retrospective single-center study.Neurogenetics · 2026Article
- Expanding Hereditary Spastic Paraplegias Limits: Biallelic SPAST Variants in Cerebral Palsy Mimics.Annals of clinical and translational neurology · 2026Article
- Missense variant in TTBK2 kinase domain causes loss of function and impaired protein phosphorylation.Scientific reports · 2025Article
- Novel missense ALDH18A1 variant in a family with autosomal dominant spastic paraplegia.Journal of neurology · 2025Article
- From Overgrowth to Complex Malformations: A NovelChildren (Basel, Switzerland) · 2025Article
- Biomarkers in Hereditary Spastic Paraplegias.International journal of molecular sciences · 2025Review
- Hereditary spastic paraparesis type 18 (SPG18): new ERLIN2 variants in a series of Italian patients, shedding light upon genetic and phenotypic variability.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024Article
- Autosomal Dominant Spastic Paraplegia With Dysregulation of Bowel Function Associated With Heterozygous AP4S1 Gene Mutation: Case Report.Neurology. Genetics · 2024Article
- Article
- Multiomic analysis in fibroblasts of patients with inborn errors of cobalamin metabolism reveals concordance with clinical and metabolic variability.EBioMedicine · 2024Article
- Hereditary spastic paraplegia: Novel insights into the pathogenesis and management.SAGE open medicine · 2024Review
- Enhanced oxidative phosphorylation, re-organized intracellular signaling, and epigenetic de-silencing as revealed by oligodendrocyte translatome analysis after contusive spinal cord injury.Scientific reports · 2023Article
- Molecular Mimicry between Meningococcal B Factor H-Binding Protein and Human Proteins.Global medical genetics · 2023Article
- Outcome Measures and Biomarkers for Clinical Trials in Hereditary Spastic Paraplegia: A Scoping Review.Genes · 2023Article
- Functional assessment of homozygous ALDH18A1 variants reveals alterations in amino acid and antioxidant metabolism.Human molecular genetics · 2023Article
- The role and control of arginine levels in arginase 1 deficiency.Journal of inherited metabolic disease · 2023Review
- The mutational profile in a South African cohort with inherited neuropathies and spastic paraplegia.Frontiers in neurology · 2023Article
- Lipodystrophy-associated progeroid syndromes.Hormones (Athens, Greece) · 2022Review
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34 authors at 18 institutions in 7 countries.
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Abstract
Hereditary spastic paraplegias are heterogeneous neurological disorders characterized by a pyramidal syndrome with symptoms predominantly affecting the lower limbs. Some limited pyramidal involvement also occurs in patients with an autosomal recessive neurocutaneous syndrome due to ALDH18A1 mutations. ALDH18A1 encodes delta-1-pyrroline-5-carboxylate synthase (P5CS), an enzyme that catalyses the first and common step of proline and ornithine biosynthesis from glutamate. Through exome sequencing and candidate gene screening, we report two families with autosomal recessive transmission of ALDH18A1 mutations, and predominant complex hereditary spastic paraplegia with marked cognitive impairment, without any cutaneous abnormality. More interestingly, we also identified monoallelic ALDH18A1 mutations segregating in three independent families with autosomal dominant pure or complex hereditary spastic paraplegia, as well as in two sporadic patients. Low levels of plasma ornithine, citrulline, arginine and proline in four individuals from two families suggested P5CS deficiency. Glutamine loading tests in two fibroblast cultures from two related affected subjects confirmed a metabolic block at the level of P5CS in vivo. Besides expanding the clinical spectrum of ALDH18A1-related pathology, we describe mutations segregating in an autosomal dominant pattern. The latter are associated with a potential trait biomarker; we therefore suggest including amino acid chromatography in the clinico-genetic work-up of hereditary spastic paraplegia, particularly in dominant cases, as the associated phenotype is not distinct from other causative genes.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.