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A Bioluminescent and Fluorescent Orthotopic Syngeneic Murine Model of Androgen-dependent and Castration-resistant Prostate Cancer
Published on: March 6, 2018
Bone mineral density changes on androgen deprivation therapy for prostate cancer and response to antiresorptive
S Yaturu1, S DjeDjos, G Alferos
1Department of Endocrinology, Overton Brooks VAMC/LSU HSC, Shreveport, LA 71101-4295, USA. yaturu@yahoo.com
Abstract:
Androgen deprivation therapy improves survival of patients with prostate cancer and leads to hypogonadal state. Gonadal hormones are essential for skeletal integrity and hypogonadism constitutes a major risk factor for osteoporosis. To examine the bone loss secondary to androgen deprivation therapy, we reviewed the bone mineral density (BMD) studies of 152 patients with prostate cancer with mean duration of androgen deprivation therapy of 58 months. Among them 55 subjects had follow-up BMD measurement at 12-15 months with 39 of them on antiresorptive therapy. Osteoporosis was noted at least at one site in 92 (60.5%), among which 74 (48.7%) had changes at hip with the more prominent changes at ward's triangle, 18 (11.8%) at other sites. Osteopenia was present in 37 (24%) and only 17 (11%) were normal. The duration of antiandrogen therapy did not correlate with the degree of bone loss. Significant in improvement in the BMD is noted at 12-15 month follow-up on antiresorptive therapy. We conclude that men treated with androgen deprivation therapy are at risk for bone loss and should have BMD measured at the time of initiation of androgen deprivation therapy and periodically.
Insights
Androgen deprivation therapy for prostate cancer significantly increases osteoporosis risk. Bone mineral density (BMD) monitoring and antiresorptive therapy are crucial for managing bone loss in these patients.
Area of Science:
- Oncology
- Endocrinology
- Bone Metabolism
Background:
- Androgen deprivation therapy (ADT) is a cornerstone in prostate cancer treatment.
- ADT induces a hypogonadal state, a known risk factor for osteoporosis.
- Skeletal integrity is hormone-dependent, making ADT a concern for bone health.
Purpose of the Study:
- To investigate the extent of bone loss in prostate cancer patients undergoing ADT.
- To assess the impact of ADT duration on bone mineral density (BMD).
- To evaluate the efficacy of antiresorptive therapy in mitigating ADT-induced bone loss.
Main Methods:
- Retrospective review of BMD studies in 152 prostate cancer patients on ADT (mean duration 58 months).
- Analysis of follow-up BMD measurements at 12-15 months for 55 patients.
- Comparison of BMD changes in patients with and without antiresorptive therapy.
Main Results:
- Osteoporosis was diagnosed in 60.5% of patients, with hip involvement in 48.7%.
- Osteopenia was present in 24% of patients; only 11% had normal BMD.
- Antiresorptive therapy showed significant BMD improvement at 12-15 month follow-up.
Conclusions:
- Men receiving ADT for prostate cancer are at high risk for significant bone loss.
- Baseline and periodic BMD measurements are recommended for patients on ADT.
- Antiresorptive therapy can effectively improve BMD in patients undergoing ADT.
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