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  • Title: Overexpression of annexin V in cystic fibrosis epithelial cells from fetal trachea.
    Author: Della Gaspera B, Weinman S, Huber C, Lemnaouar M, Paul A, Picard J, Gruenert DC.
    Journal: Exp Cell Res; 1995 Aug; 219(2):379-83. PubMed ID: 7641788.
    Abstract:
    In this report, we investigated the expression of annexins I, II, V, and VI by Northern and Western blot analysis in four cell lines isolated from human fetal tracheae. Two cell lines were obtained from normal fetuses and the two others from fetuses with cystic fibrosis (CF). One CF fetus was heterozygous for the S549N and N1303K substitutions, whereas the other was homozygous for the delta F508 deletion. We found that the four annexins are always coexpressed. The expression of annexins I, II, and VI was the same in the four cell lines. In contrast, that of annexin V was significantly higher in CF than in normal cells. These observations demonstrate that annexins I, II, V, and VI are independently regulated in tracheal epithelial cell lines. Moreover, they suggest that the overexpressed annexin V, a Ca2+ channel, might profoundly modify Ca2+ transport across the membranes of CF cells.
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