Towards a new understanding of NCL pathogenesis

Area of Science:

• Neuroscience
• Genetics
• Pathology

Background:

• Neuronal Ceroid Lipofuscinoses (NCLs), also known as Batten disease, are inherited neurodegenerative disorders.
• Traditionally grouped by shared clinical and pathological features, the growing number of identified causative genes necessitates reassessment.

Purpose of the Study:

• To re-evaluate the understanding of NCL pathogenesis and the basis for their collective grouping.
• To explore the similarities and differences in pathology across various NCL subtypes.

Main Methods:

• Review of existing literature and characterization of animal models.
• Analysis of shared features like storage material accumulation, neuron loss, and immune system activation.
• Examination of recent data on pathway-dependent pathology, glial dysfunction, and extended brain region involvement.

Main Results:

• NCL subtypes share autofluorescent storage material, neuron loss, and glial activation.
• Animal models highlight selective neuron loss linked to glial activation.
• Pathology is pathway-dependent, involves glial dysfunction, and extends beyond the brain, with significant variations among subtypes.

Conclusions:

• Despite shared themes, marked differences exist in NCL pathology across subtypes.
• The diverse nature of mutated genes and pathology suggests a need to reconsider the collective grouping of NCLs.
• NCLs may warrant consideration as separate entities rather than a single group.