Volume 121, Issue 9 pp. 1958-1966
Cancer Cell Biology

The antibody MAB8051 directed against osteoprotegerin detects carbonic anhydrase II: Implications for association studies with human cancers

Elizabeth A. Waterman

Corresponding Author

Elizabeth A. Waterman

Academic Unit of Urology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom

Fax: +44-114-2711711.

Academic Unit of Urology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United KingdomSearch for more papers by this author
Neil A. Cross

Neil A. Cross

Academic Unit of Urology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom

Search for more papers by this author
Jenifer M. Lippitt

Jenifer M. Lippitt

Academic Unit of Urology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom

Search for more papers by this author
Simon S. Cross

Simon S. Cross

Academic Unit of Pathology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom

Search for more papers by this author
Ishtiaq Rehman

Ishtiaq Rehman

Academic Unit of Urology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom

Search for more papers by this author
Ingunn Holen

Ingunn Holen

Clinical Oncology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom

Search for more papers by this author
Freddie C. Hamdy

Freddie C. Hamdy

Academic Unit of Urology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom

Search for more papers by this author
Colby L. Eaton

Colby L. Eaton

Academic Unit of Urology, School of Medicine and Biomedical Sciences, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom

Search for more papers by this author
First published: 13 July 2007
Citations: 5

Abstract

A commonly used monoclonal antibody targeting osteoprotegerin (OPG), MAB8051, detects a truncated protein species in breast and prostate cancer cell lysates. OPG expression has been reported to contribute to cell survival of both of these cancers. We hypothesised that the truncated protein represented a unique tumour-associated OPG isoform. However, here we show that the truncated protein identified by MAB8051 in cancer cell lines is carbonic anhydrase II (CA II), also implicated in tumour biology. We clearly demonstrate cross-reactivity of this OPG antibody in western blots. OPG and CA II RNA-interference studies confirmed the identity of the bands. We show almost identical staining patterns between MAB8051 and CA II immunohistochemistry of different human tissue types and human tumour types using serial sections. We conclude that care should be exercised using this antibody for immunohistochemistry studies, without additional in situ hybridisation, or parallel use of other OPG-specific antibodies. © 2007 Wiley-Liss, Inc.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.