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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Subtypes of intercalated cells in rat kidney collecting duct defined by antibodies against erythroid band 3 and renal vacuolar H+-ATPase.

The cellular distributions of the kidney form of the erythrocyte band 3 chloride/bicarbonate exchanger and the kidney vacuolar H+- transporting ATPase were examined in rat kidney collecting duct by immunocytochemical staining of adjacent semithin sections. Polyclonal anti-peptide antibodies directed against two regions of murine erythroid band 3 gave a pattern of basolateral labeling similar to that seen with antibodies directed against the entire protein. In the medullary collecting duct almost all intercalated cells expressed basolateral membrane band 3 and displayed apical membrane H+-ATPase. In the cortical collecting duct and the connecting segment, band 3 labeling was restricted to a subpopulation of intercalcated cells. In the cortical collecting duct 46% of intercalated cells had apical H+-ATPase and basolateral band 3. Cells that had either basolateral or diffuse cytoplasmic staining for H+-ATPase were all band 3-negative and accounted for 53% of the intercalated cells. In addition, occasional intercalated cells with apical H+-ATPase appeared to lack basolateral band 3. These results demonstrate the coexpression of H+-ATPase and band 3 in opposite plasma membrane domains of a subpopulation of intercalated cells that are probably the acid-excreting (type A) cells. All other intercalated cells lacked immunoreactive band 3 and probably include the bicarbonate-excreting (type B) cells.[1]

References

  1. Subtypes of intercalated cells in rat kidney collecting duct defined by antibodies against erythroid band 3 and renal vacuolar H+-ATPase. Alper, S.L., Natale, J., Gluck, S., Lodish, H.F., Brown, D. Proc. Natl. Acad. Sci. U.S.A. (1989) [Pubmed]
 
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