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Published in: BMC Cancer 1/2005

Open Access 01-12-2005 | Research article

Expression of a novel carbonic anhydrase, CA XIII, in normal and neoplastic colorectal mucosa

Authors: Laura Kummola, Jonna M Hämäläinen, Jyrki Kivelä, Antti J Kivelä, Juha Saarnio, Tuomo Karttunen, Seppo Parkkila

Published in: BMC Cancer | Issue 1/2005

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Abstract

Background

Carbonic anhydrase (CA) isozymes may have an important role in cancer development. Some isozymes control pH homeostasis in tumors that appears to modulate the behaviour of cancer cells. CA XIII is the newest member of the CA gene family. It is a cytosolic isozyme which is expressed in a number of normal tissues. The present study was designed to investigate CA XIII expression in prospectively collected colorectal tumor samples.

Methods

Both neoplastic and normal tissue specimens were obtained from the same patients. The analyses were performed using CA XIII-specific antibodies and an immunohistochemical staining method. For comparison, the tissue sections were immunostained for other cytosolic isozymes, CA I and II.

Results

The results indicated that the expression of CA XIII is down-regulated in tumor cells compared to the normal tissue. The lowest signal was detected in carcinoma samples. This pattern of expression was quite parallel for CA I and II.

Conclusion

The down-regulation of cytosolic CA I, II and XIII in colorectal cancer may result from reduced levels of a common transcription factor or loss of closely linked CA1, CA2 and CA13 alleles on chromosome 8. Their possible role as tumor suppressors should be further evaluated.
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Metadata
Title
Expression of a novel carbonic anhydrase, CA XIII, in normal and neoplastic colorectal mucosa
Authors
Laura Kummola
Jonna M Hämäläinen
Jyrki Kivelä
Antti J Kivelä
Juha Saarnio
Tuomo Karttunen
Seppo Parkkila
Publication date
01-12-2005
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2005
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/1471-2407-5-41

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