Monoclonal antibodies to human erythrocyte membrane Ca++-Mg++ adenosine triphosphatase pump recognize an epitope in the basolateral membrane of human kidney distal tubule cells

J. L. Borke, J. Minami, A. Verma, J. T. Penniston, Rajiv Kumar

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Abstract

Human calcium transporting tissues were examined to determine whether they contained a protein similar to the Ca++-Mg++ adenosine triphosphatase (Ca++-Mg++-ATPase) pump of the human erythrocyte membrane. Tissues were processed for immunoperoxidase staining using monoclonal antibodies against purified Ca++-Mg++-ATPase. In human kidneys, specific staining was found only along the basolateral membrane of the distal convoluted tubules. Glomeruli and other segments of the nephron did not stain. Staining of erythrocytes in human spleen was readily observed. Human small intestine, human parathyroid, and human liver showed no antigens that crossreacted with the antibodies to Ca++-Mg++-ATPase. Specific staining of distal tubule basolateral membranes from the kidney of a chimpanzee was also noted. Our experiments show, for the first time, that basolateral membranes of the human distal convoluted tubule contain a protein that is immunologically similar to the human erythrocyte Ca++-Mg++-ATPase. These observations suggest that the cells of the distal convoluted tubules of human kidney may have a calcium pump similar to that of human erythrocyte membranes.

Original languageEnglish (US)
Pages (from-to)1225-1231
Number of pages7
JournalJournal of Clinical Investigation
Volume80
Issue number5
StatePublished - 1987

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Distal Kidney Tubule
Erythrocyte Membrane
Adenosine Triphosphatases
Epitopes
Monoclonal Antibodies
Membranes
Staining and Labeling
Erythrocytes
Kidney Tubules
Calcium
Kidney
Pan troglodytes
Nephrons
Small Intestine

ASJC Scopus subject areas

  • Medicine(all)

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Monoclonal antibodies to human erythrocyte membrane Ca++-Mg++ adenosine triphosphatase pump recognize an epitope in the basolateral membrane of human kidney distal tubule cells. / Borke, J. L.; Minami, J.; Verma, A.; Penniston, J. T.; Kumar, Rajiv.

In: Journal of Clinical Investigation, Vol. 80, No. 5, 1987, p. 1225-1231.

Research output: Contribution to journalArticle

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AU - Kumar, Rajiv

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