Carbonic anhydrase IX, MN/CA IX

Analysis of stomach complementary DNA sequence and expression in human and rat alimentary tracts

S. Pastorekova, S. Parkkila, A. K. Parkkila, Rene Opavsky, V. Zelnik, J. Saarnio, J. Pastorek

Research output: Contribution to journalArticle

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Abstract

Background and Aims: CA IX (formerly MN protein) is a carbonic anhydrase isoenzyme whose expression is associated with human tumors. However, it has also been found in normal gastric mucosa. The aim of this study was to determine differences in complementary DNAs (cDNAs), to obtain an overview of distribution in the alimentary tract, and to obtain data on expression in tumors. Methods: A CA9 cDNA isolated from a human stomach library was sequenced along with the cDNA derived from HeLa cells. Western blotting and immunohistochemical analyses of human and animal tissues were performed using CA IX-specific monoclonal antibody and rabbit antiserum to human CA II. Results: Sequence analysis showed no differences between the stomach- and HeLa-derived cDNAs. CA IX was detected at the basolateral surface of gastric, intestinal, and gallbladder epithelia. In stomach tumor samples, expression of CA IX was lost or reduced. Conclusions: Differential distribution of CA IX in normal and tumor tissues is not associated with cDNA mutations. Evolutionary conservation in vertebrates as well as abundant expression of CA IX protein in normal human gastric mucosa, but not in derived tumors, indicate its physiological importance.

Original languageEnglish (US)
Pages (from-to)398-408
Number of pages11
JournalGastroenterology
Volume112
Issue number2
DOIs
StatePublished - Jan 1 1997

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Stomach
Complementary DNA
Neoplasms
Gastric Mucosa
Carbonic Anhydrases
Intestinal Mucosa
Gallbladder
HeLa Cells
Isoenzymes
Sequence Analysis
Vertebrates
Immune Sera
Proteins
Western Blotting
Monoclonal Antibodies
Carbonic Anhydrase IX
Rabbits
Mutation

ASJC Scopus subject areas

  • Gastroenterology

Cite this

Pastorekova, S., Parkkila, S., Parkkila, A. K., Opavsky, R., Zelnik, V., Saarnio, J., & Pastorek, J. (1997). Carbonic anhydrase IX, MN/CA IX: Analysis of stomach complementary DNA sequence and expression in human and rat alimentary tracts. Gastroenterology, 112(2), 398-408. https://doi.org/10.1053/gast.1997.v112.pm9024293

Carbonic anhydrase IX, MN/CA IX : Analysis of stomach complementary DNA sequence and expression in human and rat alimentary tracts. / Pastorekova, S.; Parkkila, S.; Parkkila, A. K.; Opavsky, Rene; Zelnik, V.; Saarnio, J.; Pastorek, J.

In: Gastroenterology, Vol. 112, No. 2, 01.01.1997, p. 398-408.

Research output: Contribution to journalArticle

Pastorekova, S, Parkkila, S, Parkkila, AK, Opavsky, R, Zelnik, V, Saarnio, J & Pastorek, J 1997, 'Carbonic anhydrase IX, MN/CA IX: Analysis of stomach complementary DNA sequence and expression in human and rat alimentary tracts', Gastroenterology, vol. 112, no. 2, pp. 398-408. https://doi.org/10.1053/gast.1997.v112.pm9024293
Pastorekova, S. ; Parkkila, S. ; Parkkila, A. K. ; Opavsky, Rene ; Zelnik, V. ; Saarnio, J. ; Pastorek, J. / Carbonic anhydrase IX, MN/CA IX : Analysis of stomach complementary DNA sequence and expression in human and rat alimentary tracts. In: Gastroenterology. 1997 ; Vol. 112, No. 2. pp. 398-408.
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