Cl- and K+ transport in human biliary cell lines

Srisaila Basavappa, John Middleton, Allen W. Mangel, James M. Mcgill, Jonathan A. Cohn, J. Gregory Fitz

Research output: Contribution to journalArticle

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Abstract

Background: The cellular mechanisms which contribute to billing secretion and absorption are not fully defined. The purpose of these studies was to evaluate the membrane ion transport properties of Mz-ChA-1 and Sk-ChA-1 cell lines derived from human biliary tumors. Methods: In cultured cells, 125I and 36Cl efflux rates were used to assess membrane anion permeability, and 86Rb efflux rates were used to assess K+ permeability. Results: Sections of tumors grown on BALB/ Urd mice were used for morphological evaluation and for detection of cystic fibrosis transmembrane conductance regulator (CFTR), the protein product of the cystic fibrosis gene. There was organized development of ductular structures and cells stained for γ-glutamyl transpeptidase and CK-19. Immunoperoxidase staining for CFTR, which is likely a Cl- channel, was also present. Increases in intracellular Ca2+ stimulated by exposure to ionomycin or thapsigargin increased efflux of 125I, 36Cl, and 86Rb. Efflux of 125I was greater than 36Cl, and anion efflux was inhibited by the Cl- channel blocker 4,4′-diisothiocyanatostilbene-2,2′-disulfonic acid. Increases in 5′-cyclic adenosine monophosphate increased efflux of 36Cl greater than 125I but had no effect on 86Rb efflux. Both cell lines possess bumetanide-sensitive 86Rb uptake consistent with possible Na+/K+/2Cl- cotransport. Conclusions: These human cell lines retain certain phenotypic features of differentiated biliary cells and may be useful for further investigation of biliary fluid and electrolyte transport.

Original languageEnglish (US)
Pages (from-to)1796-1805
Number of pages10
JournalGastroenterology
Volume104
Issue number6
StatePublished - 1993

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Cystic Fibrosis Transmembrane Conductance Regulator
Cell Line
Anions
Permeability
Bumetanide
Ionomycin
Thapsigargin
Membranes
gamma-Glutamyltransferase
Ion Transport
Cystic Fibrosis
Cyclic AMP
Electrolytes
Cultured Cells
Neoplasms
Staining and Labeling
Acids
Genes
Proteins

ASJC Scopus subject areas

  • Gastroenterology

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Basavappa, S., Middleton, J., Mangel, A. W., Mcgill, J. M., Cohn, J. A., & Fitz, J. G. (1993). Cl- and K+ transport in human biliary cell lines. Gastroenterology, 104(6), 1796-1805.

Cl- and K+ transport in human biliary cell lines. / Basavappa, Srisaila; Middleton, John; Mangel, Allen W.; Mcgill, James M.; Cohn, Jonathan A.; Fitz, J. Gregory.

In: Gastroenterology, Vol. 104, No. 6, 1993, p. 1796-1805.

Research output: Contribution to journalArticle

Basavappa, S, Middleton, J, Mangel, AW, Mcgill, JM, Cohn, JA & Fitz, JG 1993, 'Cl- and K+ transport in human biliary cell lines', Gastroenterology, vol. 104, no. 6, pp. 1796-1805.
Basavappa S, Middleton J, Mangel AW, Mcgill JM, Cohn JA, Fitz JG. Cl- and K+ transport in human biliary cell lines. Gastroenterology. 1993;104(6):1796-1805.
Basavappa, Srisaila ; Middleton, John ; Mangel, Allen W. ; Mcgill, James M. ; Cohn, Jonathan A. ; Fitz, J. Gregory. / Cl- and K+ transport in human biliary cell lines. In: Gastroenterology. 1993 ; Vol. 104, No. 6. pp. 1796-1805.
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