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Kappler P, Morgan MA, Ivanyi P, Brunotte SJ, Ganser A, Reuter CWM. Prognostic role of docetaxel-induced suppression of free testosterone serum levels in metastatic prostate cancer patients. Sci Rep 2021; 11:16457. [PMID: 34385568 PMCID: PMC8361102 DOI: 10.1038/s41598-021-95874-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/30/2021] [Indexed: 11/09/2022] Open
Abstract
To date, only few data concerning the biologically active, free form of testosterone (FT) are available in metastatic prostate cancer (mPC) and the impact of FT on disease, therapy and outcome is largely unknown. We retrospectively studied the effect of docetaxel on FT and total testosterone (TT) serum levels in 67 mPC patients monitored between April 2008 and November 2020. FT and TT levels were measured before and weekly during therapy. The primary endpoint was overall survival (OS). Secondary endpoints were prostate-specific antigen response and radiographic response (PSAR, RR), progression-free survival (PFS), FT/TT levels and safety. Median FT and TT serum levels were completely suppressed to below the detection limit during docetaxel treatment (FT: from 0.32 to < 0.18 pg/mL and TT: from 0.12 to < 0.05 ng/mL, respectively). Multivariate Cox regression analyses identified requirement of non-narcotics, PSAR, complete FT suppression and FT nadir values < 0.18 pg/mL as independent parameters for PFS. Prior androgen-receptor targeted therapy (ART), soft tissue metastasis and complete FT suppression were independent prognostic factors for OS. FT was not predictive for treatment outcome in mPC patients with a history of ART.
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Affiliation(s)
- Paula Kappler
- Department of Hematology, Hemostaseology, Oncology, and Stem Cell Transplantation, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Michael A Morgan
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Philipp Ivanyi
- Department of Hematology, Hemostaseology, Oncology, and Stem Cell Transplantation, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Stefan J Brunotte
- Department of Hematology, Hemostaseology, Oncology, and Stem Cell Transplantation, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Arnold Ganser
- Department of Hematology, Hemostaseology, Oncology, and Stem Cell Transplantation, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - Christoph W M Reuter
- Department of Hematology, Hemostaseology, Oncology, and Stem Cell Transplantation, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
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