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The aim is to understand how different mutations in the NPC1 gene affect cholesterol transport and accumulation in cells.

Differential Trafficking Phenotypes of NPC1 Mutant Proteins Reveal Distinct Cholesterol Accumulation Profiles

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The aim is to understand how different mutations in the NPC1 gene affect cholesterol transport and accumulation in cells.
Expressed NPC1 mutants and wild-type NPC1 in NPC1 knockout CHO-CT43 cells.
Analyzed trafficking patterns using Western blot based on endoglycosidase H sensitivity.
Examined lipid raft distribution and unesterified cholesterol levels using flotillin 2, filipin staining, and HPLC.
Identified three phenotypes of NPC1 mutants: intracellularly retained, slow-trafficking, and wild-type-like.
Determined that p.I1061T variant has the highest cholesterol levels and most severe biochemical profile.
Correlated trafficking patterns with cholesterol accumulation and lipid raft distribution.

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Investigates cholesterol accumulation in NPC1 mutants, revealing distinct trafficking phenotypes and implications for treatment.

Mahmoud et al. (2026) studied this question.

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