Farber disease (FD) is a debilitating lysosomal storage disorder characterized by severe inflammation and neurodegeneration. FD is caused by mutations in the ASAH1 gene, resulting in deficient acid ceramidase (ACDase) activity. Patients with ACDase deficiency exhibit a broad clinical spectrum. In classic cases, patients develop hepatosplenomegaly, nervous system involvement, and childhood mortality. Ocular manifestations include decreased vision, a grayish appearance to the retina with a cherry red spot, and nystagmus. That said, the full effect of ACDase deficiency on the visual system has not been studied in detail. We previously developed a mouse model that is orthologous for a known patient mutation in Asah1 that recapitulates human FD. Herein, we report evidence of a severe ocular pathology in Asah1P361R/P361R mice. Asah1P361R/P361R mice exhibit progressive retinal and optic nerve pathology. Through noninvasive ocular imaging and histopathological analyses of these Asah1P361R/P361R animals, we revealed progressive inflammation, the presence of retinal dysplasia, and significant storage pathology in various cell types in both the retina and optic nerves. Lipidomic analyses of retinal tissues revealed an abnormal accumulation of ceramides and other sphingolipids. Electroretinograms and behavioral tests showed decreased retinal and visual responses. Taken together, these data suggest that ACDase deficiency leads to sphingolipid imbalance, inflammation, dysmorphic retinal and optic nerve pathology, and severe visual impairment.

• MeSH
• ceramidy genetika   metabolismus   MeSH
• Farberova nemoc * enzymologie   genetika   patologie   MeSH
• kyselá ceramidasa genetika   metabolismus   MeSH
• missense mutace * MeSH
• modely nemocí na zvířatech MeSH
• mutantní kmeny myší MeSH
• myši MeSH
• nervus opticus * enzymologie   patologie   MeSH
• poruchy zraku * enzymologie   genetika   patologie   MeSH
• retina * enzymologie   patologie   MeSH
• sfingolipidy genetika   metabolismus   MeSH
• substituce aminokyselin MeSH
• zánět enzymologie   genetika   patologie   MeSH
• zvířata MeSH
• Check Tag
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Research Support, N.I.H., Extramural MeSH
• Názvy látek
• Asah1 protein, mouse MeSH Prohlížeč
• ceramidy MeSH
• kyselá ceramidasa MeSH
• sfingolipidy MeSH