Annexin A3 (ANXA3) as Protein-Based Marker for Non-Invasive Molecular Diagnostics of Prostate Carcinoma
Emerging from a differential proteomic study of sample pairs of prostate cancer and benign tissue, annexin A3 (ANXA3) was chosen as a potential novel biomarker for the early and non-invasive diagnosis of prostate cancer. We wanted to show or investigate, that:
- ANXA3 can be detected in urine after standard digital rectal examination.
- ANXA3 has better specificities than tPSA, in particular in the grey zone of PSA
- ANXA3 can help avoid unnecessary biopsies
- ANXA3 can in the long run replace PSA as a marker
Benign Prostatic Hyperplasia
Prostatic Intraepithelial Neoplasia
|Study Design:||Observational Model: Defined Population
Primary Purpose: Screening
Time Perspective: Longitudinal
Time Perspective: Retrospective/Prospective
|Official Title:||Annexin A3 (ANXA3) as Protein-Based Marker for Non-Invasive Molecular Diagnostics of Prostate Carcinoma|
|Study Start Date:||September 2005|
|Estimated Study Completion Date:||September 2006|
The aim of this multi centre and double-blinded study was to investigate specificities and sensitivities of early detection of prostate cancer with a new protein biomarker, annexin A3, using urine after digital rectal examination/massage (exprimate urine) in direct comparison to the corresponding measurements of the gold standard, total PSA. The material obtained by this non-invasive procedure was moreover used to determine appropriate cut-off values and optimal fractions (e.g. after centrifugation) and calibrations for quantitative measurements of this novel marker.
Patients (500-750) were (and are) continuously recruited from four clinical centres in Germany (Berlin, Tübingen, Ludwigshafen) and Austria (Innsbruck). The major aspect was:
• Can annexin A3 provide a better specificity than tPSA, in particular in the grey zone of PSA (2-10 ng/ml) and can annexin A3 thus contribute to a significant reduction of invasive transrectal biopsies?
Please refer to this study by its ClinicalTrials.gov identifier: NCT00400894
|Principal Investigator:||Martin Schostak, PD Dr.||University Medical Centre Charité, Berlin, Germany|
|Study Director:||André Schrattenholz, Prof. Dr.||ProteoSys AG, Mainz, Germany|