Changes in bone and mineral homeostasis after short-term androgen deprivation therapy with or without androgen receptor signalling inhibitor - substudy of a single-centre, double blind, randomised, placebo-controlled phase 2 trial.
Androgen deprivation therapy; Androgen receptor signalling inhibitor; Bone turnover marker; Prostate cancer; Stable calcium isotope; Androgen Antagonists; Androgens; Receptors, Androgen; Calcium; Androgen Receptor Antagonists; Minerals; Biomarkers; Male; Humans; Androgen Receptor Antagonists/adverse effects; Minerals/therapeutic use; Homeostasis; Androgen Antagonists/adverse effects; Prostatic Neoplasms/pathology; Prostatic Neoplasms; Biochemistry, Genetics and Molecular Biology (all); General Biochemistry, Genetics and Molecular Biology; General Medicine
Abstract :
[en] [en] BACKGROUND: Prostate cancer (PCa) patients treated with androgen deprivation therapy (ADT) have an increased fracture risk. Exploring biomarkers for early bone loss detection is of great interest.
METHODS: Pre-planned substudy of the ARNEO-trial (NCT03080116): a double blind, randomised, placebo-controlled phase 2 trial performed in high-risk PCa patients without bone metastases between March 2019 and April 2021. Patients were 1:1 randomised to treatment with gonadotropin-releasing hormone antagonist (degarelix) + androgen receptor signalling inhibitor (ARSI; apalutamide) versus degarelix + matching placebo for 12 weeks prior to prostatectomy. Before and following ADT, serum and 24-h urinary samples were collected. Primary endpoints were changes in calcium-phosphate homeostasis and bone biomarkers.
FINDINGS: Of the 89 randomised patients, 43 in the degarelix + apalutamide and 44 patients in the degarelix + placebo group were included in this substudy. Serum corrected calcium levels increased similarly in both treatment arms (mean difference +0.04 mmol/L, 95% confidence interval, 0.02; 0.06), and parathyroid hormone and 1,25-dihydroxyvitamin D3 levels decreased. Bone resorption markers increased, and stable calcium isotope ratios reflecting net bone mineral balance decreased in serum and urine similarly in both groups.
INTERPRETATION: This exploratory substudy suggests that 12 weeks of ADT in non-metastatic PCa patients results in early bone loss. Additional treatment with ARSI does not seem to more negatively influence bone loss in the early phase. Future studies should address if these early biomarkers are able to predict fracture risk, and can be implemented in clinical practice for follow-up of bone health in PCa patients under ADT.
FUNDING: Research Foundation Flanders; KU Leuven; University-Hospitals-Leuven.
Disciplines :
Laboratory medicine & medical technology
Author, co-author :
David, Karel ; Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium, Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
Devos, Gaëtan; Department of Urology, University Hospitals Leuven, Leuven, Belgium, Urogenital, Abdominal and Plastic Surgery, Department of Development and Regeneration, KU Leuven, Leuven, Belgium
Narinx, Nick; Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium, Department of Laboratory Medicine, University Hospitals Leuven, Leuven, Belgium
Antonio, Leen ; Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium, Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
Devlies, Wout; Department of Urology, University Hospitals Leuven, Leuven, Belgium, Urogenital, Abdominal and Plastic Surgery, Department of Development and Regeneration, KU Leuven, Leuven, Belgium, Molecular Endocrinology, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
Deboel, Ludo; Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium
Schollaert, Dieter; Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium
Eisenhauer, Anton; Geomar Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Osteolabs GmbH, Kiel, Germany
Cavalier, Etienne ; Centre Hospitalier Universitaire de Liège - CHU > > Service de chimie clinique
Vanderschueren, Dirk; Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium, Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium
Claessens, Frank; Molecular Endocrinology, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
Joniau, Steven; Department of Urology, University Hospitals Leuven, Leuven, Belgium, Urogenital, Abdominal and Plastic Surgery, Department of Development and Regeneration, KU Leuven, Leuven, Belgium
Decallonne, Brigitte ; Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium, Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium. Electronic address: brigitte.decallonne@uzleuven.be
Changes in bone and mineral homeostasis after short-term androgen deprivation therapy with or without androgen receptor signalling inhibitor - substudy of a single-centre, double blind, randomised, placebo-controlled phase 2 trial.
KD receives a PhD fellowship Fundamental Research from Flanders Research Foundation (FWO 1196522N). SJ received support from Janssen and Ferring for the study drugs. This work was funded by FWO research grant (G099518N), by KOOR grant University Hospitals Leuven (S63579) and by KU Leuven grant (C14/19/100).Research Foundation Flanders; KU Leuven; University-Hospitals-Leuven.KD receives a PhD fellowship Fundamental Research from Flanders Research Foundation (FWO 1196522N). SJ received support from Janssen and Ferring for the study drugs. This work was funded by FWO research grant (G099518N), by KOOR grant University Hospitals Leuven (S63579) and by KU Leuven grant (C14/19/100). We thank the clinical trial nurses of the department of Urology of the University Hospitals Leuven for their logistic support. We thank Annouschka Laenen for the statistical advice and support provided.
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