X Y Zhong1, S Kaul, I Diel, A Eichler, G Bastert. 1. Department of Obstetrics and Gynaecology, University Hospital, Heidelberg, Germany. ZHONG@ubaclu.unibas.ch
Abstract
PURPOSE: The work aimed to evaluate the sensitivity and specificity of the cytokeratin (CK) 19 reverse transcriptase/polymerase chain reaction (RT-PCR) for the detection of occult breast cancer in bone marrow and leukapheresis products. MATERIALS AND METHODS: Peripheral blood and bone marrow samples, obtained from 96 and 8 healthy donors respectively, served as negative controls. A total of 115 bone marrow samples and 29 leukapheresis samples from routine patients with breast cancer were analysed by CK19 RT-PCR. The PCR results were compared with those from routine immunocytology for CK8, 18, 19. RESULTS: The CK19 RT-PCR technique with primer pairs from Datta et al. (J Clin Oncol 12: 475-482, 1994), using an annealing temperature of 72 degrees C, allowed the detection of one tumour cell in 10(7) mononuclear cells. None of the control samples (96 peripheral blood and 8 bone marrow) that were positive for beta2-microglobulin by RT-PCR showed a signal for CK19. However, expression of CK19 mRNA was observed in 40.87% (70/115) of bone marrow and in 24.13% (7/29) of leukapheresis samples of patients with breast cancer. Standard immunocytology and PCR were combined for the detection of tumour cells. Five of the 65 bone marrow samples were found to be positive by CK19 RT-PCR, but were negative with the immunocytology method. CONCLUSION: RT-PCR using CK19-specific primers and optimal experimental conditions is a reliable and specific method for the detection of micrometastatic breast cancer cells.
PURPOSE: The work aimed to evaluate the sensitivity and specificity of the cytokeratin (CK) 19 reverse transcriptase/polymerase chain reaction (RT-PCR) for the detection of occult breast cancer in bone marrow and leukapheresis products. MATERIALS AND METHODS: Peripheral blood and bone marrow samples, obtained from 96 and 8 healthy donors respectively, served as negative controls. A total of 115 bone marrow samples and 29 leukapheresis samples from routine patients with breast cancer were analysed by CK19 RT-PCR. The PCR results were compared with those from routine immunocytology for CK8, 18, 19. RESULTS: The CK19 RT-PCR technique with primer pairs from Datta et al. (J Clin Oncol 12: 475-482, 1994), using an annealing temperature of 72 degrees C, allowed the detection of one tumour cell in 10(7) mononuclear cells. None of the control samples (96 peripheral blood and 8 bone marrow) that were positive for beta2-microglobulin by RT-PCR showed a signal for CK19. However, expression of CK19 mRNA was observed in 40.87% (70/115) of bone marrow and in 24.13% (7/29) of leukapheresis samples of patients with breast cancer. Standard immunocytology and PCR were combined for the detection of tumour cells. Five of the 65 bone marrow samples were found to be positive by CK19 RT-PCR, but were negative with the immunocytology method. CONCLUSION: RT-PCR using CK19-specific primers and optimal experimental conditions is a reliable and specific method for the detection of micrometastatic breast cancer cells.
Authors: William E Gillanders; Kaidi Mikhitarian; Renee Hebert; Patrick D Mauldin; Yuko Palesch; Christian Walters; Marshall M Urist; G Bruce Mann; Gerard Doherty; Virginia M Herrmann; Arnold D Hill; Oleg Eremin; Mohamed El-Sheemy; Richard K Orr; Alvaro A Valle; Michael A Henderson; Robert L Dewitty; Sonia L Sugg; Eric Frykberg; Karen Yeh; Richard M Bell; John S Metcalf; Bruce M Elliott; Thomas Brothers; Jay Robison; Michael Mitas; David J Cole Journal: Ann Surg Date: 2004-06 Impact factor: 12.969
Authors: I H Benoy; H Elst; I Van der Auwera; S Van Laere; P van Dam; E Van Marck; S Scharpé; P B Vermeulen; L Y Dirix Journal: Br J Cancer Date: 2004-11-15 Impact factor: 7.640