Interstitial lung diseases (ILD) in children represent a heterogeneous group of rare and not well defined disorders. Genetic abnormalities of surfactant proteins B (SFTPB) and more recently C (SFTPC) have been shown to be related to these pathologies. However, variability in the lung disease phenotype suggests the involvement of other surfactant-associated genes such as ABCA3 (ATP-binding cassette, sub-family A, member, 3). Thus, the aim of this project is: 1) to assess the prevalence of SFTPC mutation in children with chronic lung diseases, 2) to precise clinical and radiological features of children with SFTPC mutation, and 3) to identify environmental or genetic factors that may explain the extreme variability of this disease.
Primary Outcome Measures:
- To assess the prevalence of SFTPC mutation in children with chronic lung diseases [ Time Frame: At the inclusion visit ] [ Designated as safety issue: No ]
Secondary Outcome Measures:
- To precise clinical and radiological features of children with SFTPC mutation [ Time Frame: At the inclusion visit ] [ Designated as safety issue: No ]
- To identify environmental or genetic factors that may explain the extreme variability of this disease [ Time Frame: At the inclusion visit ] [ Designated as safety issue: No ]
Biospecimen Description:
Whole blood, plasma, DNA
| Estimated Enrollment: |
80 |
| Study Start Date: |
January 2009 |
| Estimated Study Completion Date: |
February 2012 |
| Estimated Primary Completion Date: |
July 2011 (Final data collection date for primary outcome measure) |
|
1
Children with chronic lung disease
|
Other: whole blood sample
2 ml of whole blood for children 5 ml of whole blood for parents that will be used only if 1 mutation is found in children
|
The first stage of this project will be to constitute a clinical, radiological, biological database of children (1 moth-17 years) with severe respiratory distress and/or an unexplained chronic ILD. Mutations in SFTPC, SFTPB and ABCA3 will be further identified by sequencing and documented with using the parents blood samples.
Purpose
