Pulmonary involvement in Niemann-Pick C type 1.

Area of Science:

• Genetics and rare diseases
• Pulmonology
• Lysosomal storage disorders

Background:

• Niemann-Pick disease type C (NPC) is a rare genetic disorder affecting cholesterol transport.
• Lung involvement is infrequently reported in NPC, primarily in NPC2 cases.
• The p.R404Q mutation in the NPC1 gene is investigated for its association with pulmonary issues.

Purpose of the Study:

• To investigate the prevalence and characteristics of pulmonary involvement in NPC1 patients with the p.R404Q mutation.
• To highlight that lung disease in NPC1 may be more common than previously recognized.
• To emphasize the need for early respiratory assessment in NPC1 patients.

Main Methods:

• Retrospective analysis of 12 patients from six families with NPC1.
• Detailed clinical follow-up and assessment of pulmonary manifestations.
• Review of imaging modalities for interstitial lung disease.

Main Results:

• Nine out of 12 NPC1 patients exhibited significant pulmonary involvement.
• Recurrent pneumonia and wheezing were common initial symptoms.
• Interstitial lung disease requiring oxygen support developed in several patients.

Conclusions:

• Pulmonary involvement in NPC1 is more prevalent than previously reported.
• Lung disease in NPC1 presents as obstructive and restrictive patterns, independent of neurological symptoms.
• Respiratory insufficiency and failure are potential severe outcomes of NPC1-related lung disease.