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Cited by 371

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Reversal of charge selectivity in cation or anion-selective epithelial lines by expression of different claudins

Van Itallie, Christina M., Fanning, Alan S., Anderson, James M.·2003·American Journal of Physiology-Renal Physiology

Abstract

Tight junctions (TJ) regulate paracellular ionic charge selectivity and conductance across epithelial tissues and cell lines. These properties vary among epithelia, and recent evidence implicates the claudins, a family of TJ transmembrane proteins, as important determinants of both characteristics. To test the hypothesis that each claudin contributes a characteristic charge discrimination to the TJ, we expressed claudins-2, -4, -11, and -15 in both cation-selective Madin-Darby canine kidney (MDCK) II cells and in anion-selective LLC-PK 1 cells and examined changes in transepithelial electrical resistance (TER) and paracellular charge selectivity. Regulated expression and localization were verified by immunoblot analysis and immunofluorescence microscopy, respectively. Expression of claudin-4 increased TER in both cell lines, whereas effects of the others on TER were variable. Claudin-4 and -11 decreased paracellular permeability for Na+in MDCK II cells, whereas neither claudin-2 nor -15 had an effect. Conversely, in LLC-PK 1 cells, claudin-2 and -15 increased the permeability for Na+, whereas claudin-4 and -11 were without effect. We conclude that the contribution of each claudin is most easily detectable when it reverses the direction of monolayer charge selectivity. These results are consistent with a model in which exogenous claudins add new charge-selective pores, leading to a physiological phenotype that combines endogenous and exogenous contributions. Additionally, it is possible to rationalize the direction of charge selectivity conferred by the individual claudins on the basis of electrostatic effects of the charged amino acids in their first extracellular loops.

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Crossref · 10.1152/ajprenal.00116.2003

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Metadata

Authors
Van Itallie, C. M., Fanning, A. S., & Anderson, J. M.
Venue
American Journal of Physiology-Renal Physiology
Published
2003-12
Volume
285
Issue
6
Pages
F1078-F1084
ISSN
  • 1522-1466 (ISSN-L)
  • 1931-857X
OpenAlex
W2132226772
Cited by
371
References
24
FWCI
10.49
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Reversal of charge selectivity in cation or anion-selective epithelial lines by expression of different claudins. https://app.cochat.ai/papers/10.1152/ajprenal.00116.2003
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Van Itallie, C. M., Fanning, A. S., & Anderson, J. M. (2003). Reversal of charge selectivity in cation or anion-selective epithelial lines by expression of different claudins. American Journal of Physiology-Renal Physiology. https://doi.org/10.1152/ajprenal.00116.2003

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