KLK3, PCA3, and TMPRSS2-ERG expression in the peripheral blood mononuclear cell fraction from castration-resistant prostate cancer patients and response to docetaxel treatment.
Prostate
; 74(12): 1222-30, 2014 Sep.
Article
in En
| MEDLINE
| ID: mdl-25043536
BACKGROUND: To monitor systemic disease activity, the potential of circulating tumor cells (CTCs) bears great promise. As surrogate for CTCs we measured KLK3, PCA3, and TMPRSS2-ERG messenger RNA (mRNA) in the peripheral blood mononuclear cell (PBMC) fraction from a castration-resistant prostate cancer (CRPC) patient cohort and three control groups. Moreover, biomarker response to docetaxel treatment was evaluated in the patient group. METHODS: Blood samples from 20 CRPC patients were analyzed at four different time points (prior to docetaxel treatment, at 9 weeks, 27 weeks, and 2 months after treatment). Blood was drawn once from three control groups (10 age-matched men, 10 men under 35 years of age, 12 women). All samples were analyzed for KLK3, PCA3, and TMPRSS2-ERG mRNA by using a quantitative nucleic acid amplification assay with gene-specific primers in the complementary DNA synthesis. RESULTS: At baseline, mRNA for KLK3 was detected in 17 (89%, 95% CI 76-100%), PCA3 in 10 (53%, 95% CI 30-75%), and TMPRSS2-ERG in seven of 19 evaluable patients (37%, 95% CI 15-59%). In contrast, the blood samples from all 32 healthy volunteers were reproducible negative for all markers. In response to docetaxel treatment, KLK3 levels decreased in 80% (95% CI 60-100%), PCA3 in 89% (95% CI 68-100%), and TMPRSS2-ERG in 86% (95% CI 60-100%) of patients. CONCLUSIONS: The feasibility of a highly sensitive modified nucleic acid amplification assay to assess KLK3, PCA3, and TMPRSS2-ERG mRNA in the PBMC fraction from CRPC patients was demonstrated. Moreover, response of these markers to systemic treatment was shown.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Kallikreins
/
Biomarkers, Tumor
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Gene Expression Regulation, Neoplastic
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Oncogene Proteins, Fusion
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Prostate-Specific Antigen
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Taxoids
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Prostatic Neoplasms, Castration-Resistant
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Antigens, Neoplasm
Type of study:
Observational_studies
Limits:
Adult
/
Aged
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Female
/
Humans
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Male
/
Middle aged
Language:
En
Journal:
Prostate
Year:
2014
Document type:
Article
Affiliation country:
Netherlands
Country of publication:
United States