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Published in: Orphanet Journal of Rare Diseases 1/2019

Open Access 01-12-2019 | Research

New insights on congenital pulmonary airways malformations revealed by proteomic analyses

Authors: C. Barazzone-Argiroffo, J. Lascano Maillard, I. Vidal, M. L. Bochaton-Piallat, S. Blaskovic, Y. Donati, B. E. Wildhaber, A.-L. Rougemont, C. Delacourt, I. Ruchonnet-Métrailler

Published in: Orphanet Journal of Rare Diseases | Issue 1/2019

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Abstract

Background

Congenital Pulmonary Airway Malformation (CPAM) has an estimated prevalence between 0.87 and 1.02/10,000 live births and little is know about their pathogenesis. To improve our knowledge on these rare malformations, we analyzed the cellular origin of the two most frequent CPAM, CPAM types 1 and 2, and compared these malformations with adjacent healthy lung and human fetal lungs.

Methods

We prospectively enrolled 21 infants undergoing surgical resection for CPAM. Human fetal lung samples were collected after termination of pregnancy. Immunohistochemistry and proteomic analysis were performed on laser microdissected samples.

Results

CPAM 1 and 2 express mostly bronchial markers, such as cytokeratin 17 (Krt17) or α-smooth muscle actin (ACTA 2). CPAM 1 also expresses alveolar type II epithelial cell markers (SPC). Proteomic analysis on microlaser dissected epithelium confirmed these results and showed distinct protein profiles, CPAM 1 being more heterogeneous and displaying some similarities with fetal bronchi.

Conclusion

This study provides new insights in CPAM etiology, showing clear distinction between CPAM types 1 and 2, by immunohistochemistry and proteomics. This suggests that CPAM 1 and CPAM 2 might occur at different stages of lung branching. Finally, the comparison between fetal lung structures and CPAMs shows clearly different protein profiles, thereby arguing against a developmental arrest in a localized part of the lung.
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Metadata
Title
New insights on congenital pulmonary airways malformations revealed by proteomic analyses
Authors
C. Barazzone-Argiroffo
J. Lascano Maillard
I. Vidal
M. L. Bochaton-Piallat
S. Blaskovic
Y. Donati
B. E. Wildhaber
A.-L. Rougemont
C. Delacourt
I. Ruchonnet-Métrailler
Publication date
01-12-2019
Publisher
BioMed Central
Published in
Orphanet Journal of Rare Diseases / Issue 1/2019
Electronic ISSN: 1750-1172
DOI
https://doi.org/10.1186/s13023-019-1192-4

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