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Lack of pancreatic tritiated estradiol binding activity in cystic fibrosis


, : Lack of pancreatic tritiated estradiol binding activity in cystic fibrosis. Journal of Steroid Biochemistry 28(3): 349-352

A major characteristic of cystic fibrosis (CF) is the progressive degeneration of acinar cells in the pancreas. It is now well established that the normal pancreas contains an abundant amount of an [3H]estradiol-binding protein. Although the physiological function of this protein is unknown, available evidence suggests that it modulates resting secretion from acinar cells. Analysis of pancreatic autopsy samples from 13 patients who had CF demonstrated a high degree of correlation between loss of acinar cells and loss of [3H]estradiol-binding activity. Autopsy samples taken from individual unaffected by CF contained large amounts of the [3H]estradiol-binding protein that were significantly correlated with the tissue content of amylase. This biological model demonstrates that the [3H]estradiol-binding protein in pancreas is localized primarily within acinar cells. Based on the presumed regulatory role this protein has on pancreatic secretion, an hypothesis is offered to account for acinar cell degeneration in individuals suffering from cystic fibrosis.

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