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Niemann-Pick disease--type C. Ocular histopathologic and electron microscopic studies
Archives of Ophthalmology (Chicago, Ill. : 1960)
|June 1, 1985
Summary
Niemann-Pick disease type C involves lipid storage in various eye cells, including retinal ganglion cells and optic nerve astrocytes. This cellular lipid accumulation correlates with observable clinical signs like optic nerve pallor.
Area of Science:
- Ophthalmology
- Cell Biology
- Genetics
Background:
- Niemann-Pick disease type C is a rare genetic disorder characterized by the accumulation of lipids within cells.
- Understanding the cellular pathology is crucial for diagnosing and managing the disease.
Observation:
- Histopathologic and ultrastructural analyses revealed lipid storage in multiple ocular cell types in Niemann-Pick disease type C.
- These included conjunctival fibrocytes, endothelial cells, pericytes, keratocytes, lens epithelium, retinal ganglion cells, retinal pigment epithelium, uveal tract fibrocytes, and optic nerve fibrous astrocytes.
Findings:
- Pleomorphic membranous inclusions containing granular material were the characteristic ultrastructural finding.
- Lipid accumulation in retinal ganglion cells and optic nerve astrocytes corresponded to clinical manifestations of optic nerve pallor and perimacular gray discoloration.
Implications:
- These findings highlight the widespread ocular involvement in Niemann-Pick disease type C.
- Identifying specific cellular targets may inform future therapeutic strategies for visual impairment in this condition.