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. 2001 Aug;85(4):557–562. doi: 10.1054/bjoc.2001.1924

Frequency of PSA-mRNA-bearing cells in the peripheral blood of patients after prostate biopsy

N Hara 1, T Kasahara 1, T Kawasaki 1, V Bilim 1, Y Tomita 1, K Obara 2, K Takahashi 2
PMCID: PMC2364088  PMID: 11506496

Abstract

Transrectal ultrasound (TRUS) guided prostate biopsy is standard diagnostic procedure for prostate cancer (PCa). However, possibility of dissemination of cancer cells by biopsy is not negligible. To investigate this possibility, we examined prostate specific antigen (PSA)-bearing cells in peripheral blood of the 108 patients before and after prostate biopsy. Peripheral blood samples were obtained from 108 patients with elevated serum PSA (sPSA) levels, who had undergone sextant prostate biopsy using TRUS. The presence of PSA-mRNA bearing cells was examined using the nested RT-PCR method enabling detection of one LNCaP cell diluted in 1 ml of whole blood. Among 108 patients, 62 and 46 were diagnosed with benign prostatic hyperplasia (BPH) and PCa, respectively. PSA-mRNA was detected in 3 PCa cases but in no BPH patients before and after biopsy, and in 16 BPH (25.8%) and in 21 PCa (45.7%) patients only after biopsy (P< 0.01). The patients with positive mRNA before biopsy had higher sPSA (P< 0.001), and those after biopsy had higher sPSA and PSA density (PSAD) levels (P< 0.05). Positive PSA-mRNA cases had more cancer involved biopsy cores than the negative PSA-mRNA cases (P< 0.001). Although further investigations are needed, the present findings suggest that prostate biopsy might scatter prostate cells in the blood stream especially in cases with high sPSA and, thus, might contribute to tumour spreading in the cases of prostate cancer. © 2001 Cancer Research Campaign http://www.bjcancer.com

Keywords: RT-PCR, PSA-mRNA bearing cells, prostate cancer

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Selected References

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