TY - JOUR
T1 - Null ABCA3 in humans
T2 - Large homozygous ABCA3 deletion, correlation to clinical-pathological findings
AU - Carrera, Paola
AU - Ferrari, Maurizio
AU - Presi, Silvia
AU - Ventura, Luisa
AU - Vergani, Barbara
AU - Lucchini, Valeria
AU - Cogo, Paola E.
AU - Carnielli, Virgilio P.
AU - Somaschini, Marco
AU - Tagliabue, Paolo
PY - 2014/3
Y1 - 2014/3
N2 - A study was undertaken to analyze the clinical presentation, pulmonary function, and pathological features in two female siblings with neonatal pulmonary surfactant metabolism dysfunction, type 3 (MIM 610921). The clinical records of the siblings were examined; the genes encoding surfactant protein B (SFTPB), surfactant protein C (SFTPC), and ATP-binding cassette transporter 3 protein (ABCA3) were analyzed with direct sequencing and Southern blotting. The infants were homozygous for a 5,983 bp deletion in ABCA3 including exons 2-5 as well as the start AUG codon and a putative Golgi exit signal motif. Dense abnormalities of lamellar bodies at electron microscopy and absence of ABCA3 at immunohistochemical staining were in agreement with the presence of two null alleles. In addition, an increased lipid synthesis suggested a compensatory mechanism. The clinical course in the two sisters was influenced by different environmental factors like the time needed for molecular confirmation, the ventilatory assistance adopted, the occurrence of infections. A less aggressive clinical approach did not improve the course of the disease; the prognosis was always poor. Development of a fast molecular test, able to detect also structural variants, is needed.
AB - A study was undertaken to analyze the clinical presentation, pulmonary function, and pathological features in two female siblings with neonatal pulmonary surfactant metabolism dysfunction, type 3 (MIM 610921). The clinical records of the siblings were examined; the genes encoding surfactant protein B (SFTPB), surfactant protein C (SFTPC), and ATP-binding cassette transporter 3 protein (ABCA3) were analyzed with direct sequencing and Southern blotting. The infants were homozygous for a 5,983 bp deletion in ABCA3 including exons 2-5 as well as the start AUG codon and a putative Golgi exit signal motif. Dense abnormalities of lamellar bodies at electron microscopy and absence of ABCA3 at immunohistochemical staining were in agreement with the presence of two null alleles. In addition, an increased lipid synthesis suggested a compensatory mechanism. The clinical course in the two sisters was influenced by different environmental factors like the time needed for molecular confirmation, the ventilatory assistance adopted, the occurrence of infections. A less aggressive clinical approach did not improve the course of the disease; the prognosis was always poor. Development of a fast molecular test, able to detect also structural variants, is needed.
KW - ABCA3
KW - molecular diagnostic testing
KW - newborn
KW - patient care management
KW - respiratory distress syndrome
KW - sequence deletion
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U2 - 10.1002/ppul.22983
DO - 10.1002/ppul.22983
M3 - Article
C2 - 24420869
AN - SCOPUS:84894268534
VL - 49
JO - Pediatric Pulmonology
JF - Pediatric Pulmonology
SN - 8755-6863
IS - 3
ER -