Journal
PROSTATE
Volume 52, Issue 2, Pages 89-97Publisher
WILEY
DOI: 10.1002/pros.10097
Keywords
prostate cancer; metallothionein; cell growth; drug resistance; MT-3; PC-3
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Funding
- NIEHS NIH HHS [ES10039] Funding Source: Medline
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BACKGROUND. The third isoform of metallothionein (MT-3) is overexpressed in prostate cancers and PIN lesions. The expression of MT-3 is highly variable but appears to correlate to Gleason score. The goal of the present study was to determine the effect of MT-3 overexpression on the growth of the PC-3 prostate cancer cell line. METHODS. PC-3 cells were stably transfected with either the MT-3 or MT-1E gene. Cell growth was determined by counting DAPI-stained nuclei, drug resistance by the colony formation assay, MT mRNA expression by reverse transcriptase-polymerise chain reaction, and MT protein by immunoblot. RESULTS. PC-3 cells that overexpress the MT-3 gene are growth inhibited compared with either untransfected cells, cells with blank vector, or cells with similar overexpression of the MT-1E gene. Furthermore, increased chemotherapeutic drug resistance occurred in PC-3 clones derived from MT-3- and MT-1E-transfected cells. CONCLUSION. The overexpression of MT-3 can influence the growth and chemotherapeutic drug resistance of the PC-3 prostate cancer cell line.
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