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Disease Markers
Volume 12, Issue 1, Pages 63-69

PCR Expression Analysis Of the Estrogeninducible Gene Bcei in Gastrointestinal and Other Human Tumors

Iris Wundrack,1 Roman Müllenbach,1 Cornelius Welter,2 Gerhard Seitz,3 and Nikolaus Blin1

1Div. of Molecular Genetics, University of Tübingen, Germany
2Dept. of Human Genetics, Saar University, Homburg/Saar, Germany
3Dept. of Pathology, Bamberg Hospital, Bamberg, Germany

Received 16 June 1994

Copyright © 1994 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A polymerase chain reaction (PCR) assay was developed to test for tumor cell specific expression of the BCEI gene. This new marker gene, reported at first for human breast cancer, was found specifically active in various gastrointestinal carcinomas by previously applying immunohistochemistry and RNA (Northern blot) analysis. Presently, by using reverse transcription -PCR analysis, a series of primary tumor tissues and established tumor cell lines were testcd for BCEI transcription. This approach was compared to immunostaining achieved by an antibody directed against the BCEI gene’s product. The result demonstrate the superior sensitivity of PCR by indicating the gene’ s expression in cases where immunohistochemical testing remained negative.