Uniparental Disomy as a Novel Mechanism for Surfactant Protein B (SP-B) Deficiency

Allelic heterogeneity in hereditary surfactant protein B (SP-B) deficiency.

Inability to produce surfactant protein B (SP-B) causes fatal neonatal respiratory disease. A frame-shift mutation (121ins2) is the predominant but not exclusive cause of disease. To determine the range of mechanisms responsible for SP-B deficiency, both alleles from 32 affected infants were characterized. Sixteen infants were homozygous for the 121ins2 mutation, 10 infants were heterozygous fo...

Uniparental disomy: a novel mechanism for thalassemia major.

In vitro surfactant protein B (SP-B) deficiency inhibits lamellar body formation

Surfactant protein B is essential for normal pulmonary surfactant activity and lamellar body genesis in type 2 cells. However, the role of SP-B in lamellar body genesis is poorly understood. We developed an adenovirus vector expressing antisense SP-B as an alternative in vitro model of SP-B deficiency to begin to explore the role of SP-B in lamellar body genesis. RT-PCR analysis revealed that a...

Fatal familial surfactant protein B deficiency.

Fatal familial surfactant protein B deficiency EDrroR,-In 1993 a sibship of three infants who died of hyaline membrane disease had had an absence of surfactant protein B (SP-B) and its mRNA in lung tissue.' The gene coding for SP-B has been located and a frameshift mutation in this gene has been identified in the reported sibship and in two other families .2 A further six cases of SP-B deficien...

Lung Surfactant Protein A (SP-A) Interactions with Model Lung Surfactant Lipids and an SP-B Fragment

Surfactant protein A (SP-A) is the most abundant protein component of lung surfactant, a complex mixture of proteins and lipids. SP-A performs host defense activities and modulates the biophysical properties of surfactant in concerted action with surfactant protein B (SP-B). Current models of lung surfactant mechanism generally assume SP-A functions in its octadecameric form. However, one of th...