Related Experiment Video
Updated: Jun 24, 2026

Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
Published on: April 4, 2018
ACOX1 Gain-of-Function and De Novo ROBO1 Variant in ACOX1-sEDD
Jose Molina-Espinosa1,2, Israel Pérez-López1, Raquel González-Villén3
1Dermatology Unit, San Cecilio University Clinical Hospital, Granada, Spain.
Abstract:
ACOX1-sEDD is an ultrarare neurocutaneous disorder caused by gain-of-function variants in ACOX1, leading to excessive oxidative activity and multisystem injury. We report a male infant who, from the second week of life, developed a generalized erythematous desquamative greasy eruption with sparse dysplastic ocher-colored scalp hair, followed by recurrent bilateral corneal epithelial defects, progressive hypotonia, failure to thrive, and seizures with diffuse symmetric leukoencephalopathy on brain MRI. Metabolic testing showed elevated dicarboxylic acids and medium-/long-chain acylcarnitines despite normal very-long-chain fatty acids and classical peroxisomal biomarkers, and trio exome sequencing identified de novo ACOX1 c.710A>G (p.Asn237Ser) and ROBO1 c.572delG (p.Cys191fs) variants. Cutaneous disease resolved with topical 10% N-acetylcysteine and emollients, in conjunction with oral N-acetylcysteine and adjunctive antioxidant vitamin therapy, while ocular involvement improved with vitamin A ointment and autologous serum eyedrops, supporting early recognition of ACOX1-sEDD in infants with inflammatory ichthyosiform dermatitis and ocular-neurologic involvement and suggesting that additional neurodevelopmental variants may modify disease expression.
Related Concept Videos
Point and Frameshift Mutations
Exon Recombination
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Pleiotropy
Animal Mitochondrial Genetics
CRISPR and crRNAs
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
In-vitro Mutagenesis

