A non-BRICHOS surfactant protein c mutation disrupts epithelial cell function and intercellular signaling.

ABSTRACT:

Background

Heterozygous mutations of SFTPC, the gene encoding surfactant protein C (SP-C), cause sporadic and familial interstitial lung disease (ILD) in children and adults. The most frequent SFTPC mutation in ILD patients leads to a threonine for isoleucine substitution at position 73 (I73T) of the SP-C preprotein (proSP-C), however little is known about the cellular consequences of SP-CI73T expression.

Results

To address this, we stably expressed SP-CI73T in cultured MLE-12 alveolar epithelial cells. This resulted in increased intracellular accumulation of proSP-C processing intermediates, which matched proSP-C species recovered in bronchial lavage fluid from patients with this mutation. Exposure of SP-CI73T cells to drugs currently used empirically in ILD therapy, cyclop

SUBMITTER: Woischnik M 

PROVIDER: S-EPMC2994813 | biostudies-literature | 2010 Nov

REPOSITORIES: biostudies-literature