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pubmed-article:15029229pubmed:abstractTextAlthough adenovirus (Ad) exhibits tropism for epithelial cells, little is known about the cellular effects of adenoviral binding and internalization on epithelial functions. Here, we examine its effects on the secretory acinar epithelial cells of the lacrimal gland, responsible for stimulated release of tear proteins into ocular fluid. Exposure of reconstituted rabbit lacrimal acini to replication-defective Ad for 16-18 h under conditions that resulted in >80% transduction efficiency did not alter cytoskeletal filament or biosynthetic/endosomal membrane compartment organization. Transduction specifically altered the organization of the stimulated secretory pathway, eliciting major dispersal of rab3D immunofluorescence from apical stores normally associated with mature secretory vesicles. Biochemical studies revealed that this dispersal was not associated with altered rab3D expression nor its release from cellular membranes. Ultraviolet (UV)-inactivated Ad elicited similar dispersal of rab3D immunofluorescence. In acini exposed to replication-defective or UV-inactivated Ad, carbachol-stimulated release of bulk protein and beta-hexosaminidase were significantly (P< or =0.05) inhibited to an extent proportional to the loss of rab3D-enriched mature secretory vesicles associated with these treatments. We propose that the altered secretory compartment organization and function caused by Ad reflects changes in the normal maturation of secretory vesicles, and that these changes are caused by exposure to the Ad capsid.lld:pubmed
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pubmed-article:15029229pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:15029229pubmed:articleTitleAdenoviral capsid modulates secretory compartment organization and function in acinar epithelial cells from rabbit lacrimal gland.lld:pubmed
pubmed-article:15029229pubmed:affiliationDepartment of Pharmaceutical Sciences, University of Southern California, Los Angeles, 90033, USA.lld:pubmed
pubmed-article:15029229pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:15029229pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
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