New insights into canalicular organic anion secretion
dc.contributor.author | Moseley, Richard H. | en_US |
dc.date.accessioned | 2006-04-28T16:53:30Z | |
dc.date.available | 2006-04-28T16:53:30Z | |
dc.date.issued | 1991-01 | en_US |
dc.identifier.citation | Moseley, Richard H. (1991)."New insights into canalicular organic anion secretion." Hepatology 13(1): 195-197. <http://hdl.handle.net/2027.42/38344> | en_US |
dc.identifier.issn | 0270-9139 | en_US |
dc.identifier.issn | 1527-3350 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/38344 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=1988342&dopt=citation | en_US |
dc.description.abstract | The effect of partial and complete dissipation of the membrane potential and partial depletion of cellular ATP content on the efflux of dinitrophenyl-glutathione and oxidized glutathione was examined in hepatocytes isolated from normal and mutant (TR − ) rats exhibiting defective organic anion transport. Whereas alterations in the membrane potential difference had no effect on the initial efflux rate of dinitrophenyl-glutathione and oxidized glutathione, depletion of cellular ATP inhibited dinitrophenyl-glutathione and oxidized glutathione efflux and a linear relationship between the cellular ATP content and the initial efflux rate of dinitrophenyl-glutathione was observed in normal isolated rat hepatocytes. In contrast, depletion of cellular ATP content had no significant effect on the slower rate of dinitrophenyl-glutathione efflux from TR − rat hepatocytes. These findings implicate an ATP-dependent hepatic transport system for oxidized glutathione and glutathione conjugates that is absent in TR − mutants. Fluorescence image analysis reveals normal secretion of a fluorescent bile acid fluorescein isothiocyanate glycocholate into the canalicular lumen of isolated normal and TR − mutant rat hepatocyte couplets, but negligible canalicular accumulation of a non-bileacid organic anion (carboxydichlorofluorescein diacetate) in TR − hepatocyte couplets. Canalicular membrane vesicles derived from normal rats exhibited saturable temperature- and ATP-dependent transport of sulfobromophthalein and sulfobromophthalein-glutathione that was absent in canalicular membrane vesicles from TR − rats. However, ATP-dependent daunomycin transport, reflecting transport mediated by the multidrug resistance gene product, p-glycoprotein, was present in canalicular membrane vesicles from both normal and TR − rats. Canalicular membrane vesicles from normal and TR − rats contained equal amounts of p-glycoprotein on immunoblots. These studies demonstrate that the conjugated hyperbilirubinemia in TR − mutant rats is the result of a functional absence of an ATP-dependent organic anion transport system on the canalicular membrane. | en_US |
dc.format.extent | 422724 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | W.B. Saunders | en_US |
dc.publisher | Wiley Periodiocals, Inc. | en_US |
dc.subject.other | Life and Medical Sciences | en_US |
dc.subject.other | Hepatology | en_US |
dc.title | New insights into canalicular organic anion secretion | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Internal Medicine and Specialties | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Veterans Affairs Medical Center and University of Michigan Medical Center Ann Arbor, Michigan 48109 | en_US |
dc.identifier.pmid | 1988342 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/38344/1/1840130130_ftp.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1002/hep.1840130130 | en_US |
dc.identifier.source | Hepatology | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
Files in this item
Remediation of Harmful Language
The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.
Accessibility
If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.