Expression of the gene for the multidrug resistance-associated protein in human prostate tissue
To characterize the clinical relevance of MRP gene in the chemoresistance of prostate carcinomas we determined the multidrug resistance-associated protein (MRP) expression in 30 samples from organ-confined prostate carcinoma, 9 samples from adjacent normal tissue and 4 hormone unresponsive cancers....
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
June 1999
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| In: |
Urological research
Year: 1999, Volume: 27, Issue: 3, Pages: 164-168 |
| ISSN: | 1434-0879 |
| DOI: | 10.1007/s002400050104 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/s002400050104
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| Author Notes: | Bernhard Schummer, Michael Siegsmund, Anette Steidler, Lira Toktomambetova, Kai-Uwe Köhrmann, Peter Alken |
| Summary: | To characterize the clinical relevance of MRP gene in the chemoresistance of prostate carcinomas we determined the multidrug resistance-associated protein (MRP) expression in 30 samples from organ-confined prostate carcinoma, 9 samples from adjacent normal tissue and 4 hormone unresponsive cancers. The measurement of MRP expression was carried out by reverse transcription polymerase chain reaction (RT-PCR) in combination with capillary electrophoresis. Incorporated fluorescence-labeled primers were disclosed by a laser-operated fluorescence detection module. MRP expression was quantified by integration of the peak area and correlated to the ubiquitously expressed β2 microglobulin. As positive control served the adriamycin-resistant HL60-ADR cell line, which overexpresses MRP. MRP expression was found in all samples. All samples showed a lower MRP/β2 ratio than HL60-ADR cells. The expression of the MRP gene was 30% higher in organ-confined tumors than in hormone-unresponsive anaplastic tumors. Normal tissue showed the same MRP mRNA level as the adriamycin-sensitive HL60 cells. A higher tumor stage correlated with an increase of MRP expression (>factor 2), whereas G3 tumors displayed a MRP expression 30% lower than in G2 tumors. The small alterations indicate that MRP expression seems not be involved in the chemoresistance of prostate carcinomas. |
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| Item Description: | Gesehen am 28.03.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1434-0879 |
| DOI: | 10.1007/s002400050104 |