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Detection of Circulating Tumor Cells in Blood Using an Optimized Density Gradient Centrifugation

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Molecular Staging of Cancer

Part of the book series: Recent Results in Cancer Research ((RECENTCANCER,volume 162))


The aim of the study was to compare the new density gradient centrifugation system OncoQuick with the standard density gradient centrifugation system Ficoll for improved tumor cell enrichment in blood of tumor patients. Evaluation of OncoQuick and Ficoll density gradient centrifugation was performed by flow-cytometry and immunocytochemistry using 10 ml unspiked and tumor cell-spiked blood samples of tumor-free probands. From 10 ml blood, OncoQuick density gradient centrifugation separated a cell fraction which consisted of a mean cell number of 9.5×l04 mononuclear cells compared to 1.8×l07 cells by Ficoll. Density gradient centrifugation of tumor cell-spiked blood samples with OncoQuick and Ficoll led to similar tumor cell recovery rates, between 70% and 90% for both methods. The improved depletion of mononuclear blood cells by OncoQuick simplified further immunocytochemical evaluation of the enriched cell fraction, which could be spun onto 1–2 glass slides by cytocentrifugation. In comparison, the mononuclear cells separated by Ficoll had to be spun onto more than 50 glass slides for complete immunocytochemical evaluation. Consequently, tumor cell density on each cytospin was higher after OncoQuick preparation compared to Ficoll. Density gradient centrifugation with OncoQuick results in higher relative tumor cell enrichment than Ficoll density gradient centrifugation. This simplifies further immunocytochemical tumor cell detection and is a promising tool for the detection of circulating tumor cells in blood of tumor patients.

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© 2003 Springer-Verlag Berlin Heidelberg

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Gertler, R., Rosenberg, R., Fuehrer, K., Dahm, M., Nekarda, H., Siewert, J.R. (2003). Detection of Circulating Tumor Cells in Blood Using an Optimized Density Gradient Centrifugation. In: Allgayer, H., Heiss, M.M., Schildberg, F.W. (eds) Molecular Staging of Cancer. Recent Results in Cancer Research, vol 162. Springer, Berlin, Heidelberg.

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-63945-6

  • Online ISBN: 978-3-642-59349-9

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