Paola Carrera1, Chiara Di Resta2, Chiara Volonteri3, Emanuela Castiglioni2, Silvia Bonfiglio4, Dejan Lazarevic4, Davide Cittaro4, Elia Stupka4, Maurizio Ferrari5, Marco Somaschini2. 1. Unit of Genomics for Diagnosis of Human Pathologies, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milano, Italy; Laboratory of Clinical Molecular Biology, IRCCS Ospedale San Raffaele, Milano, Italy. Electronic address: carrera.paola@hsr.it. 2. Unit of Genomics for Diagnosis of Human Pathologies, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milano, Italy. 3. Vita-Salute San Raffaele University, Milano, Italy. 4. Centre for Translational Genomics and Bioinformatics, IRCCS Ospedale San Raffaele, Milano, Italy. 5. Unit of Genomics for Diagnosis of Human Pathologies, Division of Genetics and Cell Biology, IRCCS Ospedale San Raffaele, Milano, Italy; Laboratory of Clinical Molecular Biology, IRCCS Ospedale San Raffaele, Milano, Italy; Vita-Salute San Raffaele University, Milano, Italy.
Abstract
BACKGROUND: Bronchopulmonary dysplasia (BPD) is the most common chronic lung disease in infancy, affecting preterm children with low birth weight. The disease has a multifactorial aetiology with a significant genetic component; until now published association studies have identified several candidate genes but only few of these data has been replicated. In this pilot study, we approached exome sequencing aimed at identifying non-common variants, which are expected to have a stronger phenotypic effect. MATERIALS AND METHODS: We performed this study on 26 Italian severely affected BPD preterm unrelated newborns, homogeneously selected from a large prospective cohort. We used an Illumina HiSeq 2000 for sequencing. Data analysis was focussed on genes previously associated to BPD susceptibility and to new candidates in related pathways, highlighted by a prioritization analysis performed using ToppGene Suite. RESULTS: By exome sequencing, we identified 3369 novel variants, with a median of 400 variations per sample. The top candidate genes highlighted were NOS2, MMP1, CRP, LBP and the toll-like receptor (TLR) family. All of them have been confirmed with Sanger sequencing. CONCLUSIONS: Potential candidate genes have been discovered in this preliminary study; the pathogenic role of identified variants will need to be confirmed with functional and segregation studies and possibly with further methods, able to evaluate the collective influence of rare variants. Moreover, additional candidates will be tested and genetic analysis will be extended to all affected children.
BACKGROUND:Bronchopulmonary dysplasia (BPD) is the most common chronic lung disease in infancy, affecting preterm children with low birth weight. The disease has a multifactorial aetiology with a significant genetic component; until now published association studies have identified several candidate genes but only few of these data has been replicated. In this pilot study, we approached exome sequencing aimed at identifying non-common variants, which are expected to have a stronger phenotypic effect. MATERIALS AND METHODS: We performed this study on 26 Italian severely affected BPD preterm unrelated newborns, homogeneously selected from a large prospective cohort. We used an Illumina HiSeq 2000 for sequencing. Data analysis was focussed on genes previously associated to BPD susceptibility and to new candidates in related pathways, highlighted by a prioritization analysis performed using ToppGene Suite. RESULTS: By exome sequencing, we identified 3369 novel variants, with a median of 400 variations per sample. The top candidate genes highlighted were NOS2, MMP1, CRP, LBP and the toll-like receptor (TLR) family. All of them have been confirmed with Sanger sequencing. CONCLUSIONS: Potential candidate genes have been discovered in this preliminary study; the pathogenic role of identified variants will need to be confirmed with functional and segregation studies and possibly with further methods, able to evaluate the collective influence of rare variants. Moreover, additional candidates will be tested and genetic analysis will be extended to all affected children.
Authors: Dara G Torgerson; Philip L Ballard; Roberta L Keller; Sam S Oh; Scott Huntsman; Donglei Hu; Celeste Eng; Esteban G Burchard; Roberta A Ballard Journal: Am J Physiol Lung Cell Mol Physiol Date: 2018-08-16 Impact factor: 5.464
Authors: María Álvarez-Fuente; Laura Moreno; Jane A Mitchell; Irwin K Reiss; Paloma Lopez; Dolores Elorza; Liesbeth Duijts; Alejandro Avila-Alvarez; Luis Arruza; Manuel Ramirez Orellana; Eugenio Baraldi; Patrizia Zaramella; Santiago Rueda; Álvaro Gimeno-Díaz de Atauri; Hercília Guimarães; Gustavo Rocha; Elisa Proença; Bernard Thébaud; Maria Jesús Del Cerro Journal: Pediatr Res Date: 2018-11-21 Impact factor: 3.756