Neuronal ceroid-lipofuscinosis in a Holstein steer

Area of Science:

• Veterinary Neurology
• Animal Pathology
• Genetics

Background:

• Neuronal ceroid-lipofuscinosis (NCL) comprises a group of rare, inherited neurodegenerative lysosomal storage diseases.
• These disorders are characterized by the accumulation of autofluorescent storage material within cellular lysosomes.
• NCL affects various species, leading to progressive neurological dysfunction and vision loss.

Observation:

• A young Holstein steer presented with partial blindness and mild cerebral atrophy.
• Cerebral gray matter exhibited a yellow-brown discoloration.
• Microscopic examination revealed eosinophilic, autofluorescent granules within neuronal cytoplasm and extensive retinal atrophy.

Findings:

• Ultrastructural analysis of affected neurons showed cytoplasmic storage bodies with both granular osmiophilic and lamellar structures.
• The observed pathological features are consistent with a diagnosis of neuronal ceroid-lipofuscinosis.
• The presence of these characteristic storage bodies suggests a specific lysosomal dysfunction.

Implications:

• This case suggests that Holstein cattle may be susceptible to neuronal ceroid-lipofuscinosis.
• Identifying genetic mutations associated with NCL in Holstein cattle could enable carrier testing and breeding strategies.
• Further research is warranted to elucidate the specific genetic basis and prevalence of NCL in this breed.