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NCT Number: NCT05838716

Vitamin D for Prostate Endocrine Therapy

This phase III trial tests whether high-dose vitamin D works in treating androgen-deprivation therapy (ADT)-induced bone loss in patients with prostate cancer who are undergoing androgen-deprivation therapy. Vitamins are substances that the body needs to grow and develop normally. Vitamin D helps the body absorb calcium. Calcium is one of the main building blocks of bone. A lack of vitamin D can lead to bone diseases such as osteoporosis or rickets. This trial may help researchers determine if high-dose vitamin D helps keep bones strong, lowers number of falls, and lessens fatigue in men getting androgen-deprivation therapy.

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Key information

Conditions

Stage I Prostate Cancer AJCC v8 Genital Diseases Genital Diseases, Male Genital Neoplasms, Male Male Urogenital Diseases Neoplasms Neoplasms by Site Prostatic Diseases Prostatic Neoplasms Stage II Prostate Cancer AJCC v8 Stage III Prostate Cancer AJCC v8 Stage IVA Prostate Cancer AJCC v8 Urogenital Diseases Urogenital Neoplasms

Age range

50 year and older

Sex eligibility

Male

Study type

Interventional

Phase

Phase 3

Primary location

Helen F Graham Cancer Center, Newark, Delaware, United States

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About this study

PRIMARY OBJECTIVES:

I. To evaluate the effect of high-dose vitamin D (HDVD) supplementation in prostate cancer patients on ADT-induced bone mineral density loss in the total hip over 52 weeks as measured by dual-energy x-ray absorptiometry (DXA).

II. To evaluate the effect of HDVD supplementation in prostate cancer patients on ADT-induced bone mineral density loss in the femoral neck, distal radius, and lumbar spine (L1-L4) over 52 weeks as measured by DXA.

SECONDARY OBJECTIVES:

I. To evaluate the effect of HDVD supplementation on falls over 52 weeks as measured by the Falls History questionnaire.

II. To evaluate the effect of HDVD supplementation on fractures over 52 weeks as determined by the Clinical Record Information - Follow-up Form.

III. To evaluate the effect of HDVD supplementation on quality of life over 52 weeks as measured by the Functional Assessment of Cancer Therapy- Prostate (FACT-P).

EXPLORATORY OBJECTIVE:

I. To evaluate the effect of HDVD supplementation on pain, fatigue, sleep, and activities of daily living over 52 weeks as measured by patient-reported outcomes.

OUTLINE: After undergoing collection of blood and DXA scan, patients are randomized to 1 of 2 arms.

ARM I: Patients receive HDVD orally (PO) once a week (QW) for 52 weeks. Patients also undergo collection of blood and DXA scan on study.

ARM II: Patients receive placebo PO QW for 52 weeks. Patients also undergo collection of blood and DXA scan on study.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Be diagnosed with Stage I-IV prostate cancer without metastases to bone (lymph node involvement and prior diagnosis of a primary cancer is allowed)
  • Be age 50 years or older
  • Be starting ADT or have received their first ADT treatment in the past 6 months, with a total of at least 6 planned months of treatment (both luteinizing hormone-releasing hormone [LHRH] antagonists and LHRH agonists are permitted)
  • Have a total serum vitamin D between 10 and 32 ng/ml
  • Have a total serum calcium of less than or equal to 10.5 mg/dl
  • Have a normal GFR (glomerular filtration rate > 30ml)
  • Agree not to take calcium and/or vitamin D supplements for the duration of the intervention other than those provided by the study
  • Be able to provide written informed consent
  • Be able to swallow pills and capsules
  • Be able to speak and read English

Exclusion criteria

  • Have long term (greater than 3 months) use of any pharmacologic bone-modifying agent including but not limited to oral or intravenous (IV) bisphosphonates, denosumab, or teriparatide prior to enrollment
  • Have a diagnosis of stage IV chronic kidney disease
  • Have a diagnosis of grade II or greater hypercalcemia (serum calcium greater than 11.5 mg/dl)
  • Have a history of hypercalcemia or vitamin D toxicity/sensitivity

Treatment and study plan

Biospecimen Collection

Procedure

Undergo collection of blood

Other names: Biological Sample Collection, Biospecimen Collected, Specimen Collection

D Vitamin

Dietary Supplement

Given PO

Other names: 3-[2-[7a-methyl-1-(1,4,5-trimethylhex-2-enyl)-1,2,3,3a,5,6,7,7a-octahydroinden-4-ylidene]ethylidene]-4-methylidene-cyclohexan-1-ol, Vitamin D, Vitamin D Compound, Vitamin-D

Dual X-ray Absorptiometry

Procedure

Undergo DXA scan

Other names: BMD scan, bone mineral density scan, DEXA, DEXA (Bone Density), DEXA Scan, dual energy x-ray absorptiometric scan, Dual Energy X-ray Absorptiometry, Dual X-Ray Absorptometry, DXA, DXA SCAN

Placebo Administration

Drug

Given PO

Quality-of-Life Assessment

Other

Ancillary studies

Other names: Quality of Life Assessment

Questionnaire Administration

Other

Ancillary studies

Primary outcomes

  1. Reduction of bone mineral density (BMD) loss as measured at the total hip

    Time frame: At 52 weeks

    Will determine the efficacy of high-dose vitamin D (HDVD) supplementation versus placebo in reducing BMD loss as measured at the total hip via dual-energy x-ray absorptiometry (DXA) at 52 weeks. Will use analysis of covariance (ANCOVA) with group (vitamin D or placebo) as the main factor, baseline timepoint ([T]1) BMD as covariate, and week 52 (T3) BMD as the outcome. Study site will be included as a random effect independent of residual error. An initial linear mixed model (LMM) will be fit using Restricted Maximum Likelihood (REML) estimation. The significance of the variance due to study site will be tested using the Wald Test.

  2. Reduction of BMD loss as measured at the femoral neck

    Time frame: At 52 weeks

    Will determine the efficacy of HDVD supplementation versus placebo in reducing BMD loss as measured at the femoral neck via DXA at 52 weeks. Will use ANCOVA with group (vitamin D or placebo) as the main factor, baseline (T1) BMD as covariate, and week 52 (T3) BMD as the outcome. Study site will be included as a random effect independent of residual error. An initial LMM will be fit using REML estimation. The significance of the variance due to study site will be tested using the Wald Test.

  3. Reduction of BMD loss as measured at the distal radius

    Time frame: At 52 weeks

    Will determine the efficacy of HDVD supplementation versus placebo in reducing BMD loss as measured at the distal radius via DXA at 52 weeks. Will use ANCOVA with group (vitamin D or placebo) as the main factor, baseline (T1) BMD as covariate, and week 52 (T3) BMD as the outcome. Study site will be included as a random effect independent of residual error. An initial LMM will be fit using REML estimation. The significance of the variance due to study site will be tested using the Wald Test.

  4. Reduction of BMD loss as measured at the lumbar spine

    Time frame: At 52 weeks

    Will determine the efficacy of HDVD supplementation versus placebo in reducing BMD loss as measured at the lumbar spine via DXA at 52 weeks. Will use ANCOVA with group (vitamin D or placebo) as the main factor, baseline (T1) BMD as covariate, and week 52 (T3) BMD as the outcome. Study site will be included as a random effect independent of residual error. An initial LMM will be fit using REML estimation. The significance of the variance due to study site will be tested using the Wald Test.

Secondary outcomes

  1. Change in falls

    Time frame: Baseline up to 52 weeks

    Will use generalized linear mixed models. Logistic regression models will be used to estimate the between group difference in (1) the proportion of participants who experience a fall/fracture (YES/NO) from T1 to T3. Will evaluate the distribution of total number of falls/fractures by Poisson models analysis to estimate the between group difference in (2) the total number of falls/fractures from T1 to T3. Both models (1, 2) will contain group as fixed effect and site as a random effect. Additional adjustment covariates will include falls in the previous 6 months, fractures in the previous 5 years, androgen-deprivation therapy (ADT) dose and duration, stage, radiation therapy, prior surgery, baseline vitamin D, age, body mass index (BMI), and race. Nonsignificant (P > 0.05) covariates will be removed from the model. Will report the estimates and associated 95% confidence intervals as (1) relative risk or (2) rate ratio.

  2. Change in fractures

    Time frame: Baseline up to 52 weeks

    Will use generalized linear mixed models. Logistic regression models will be used to estimate the between group difference in (1) the proportion of participants who experience a fall/fracture (YES/NO) from T1 to T3. Will evaluate the distribution of total number of falls/fractures by Poisson models analysis to estimate the between group difference in (2) the total number of falls/fractures from T1 to T3. Both models (1, 2) will contain group as fixed effect and site as a random effect. Additional adjustment covariates will include falls in the previous 6 months, fractures in the previous 5 years, ADT dose and duration, stage, radiation therapy, prior surgery, baseline vitamin D, age, BMI, and race. Nonsignificant (P > 0.05) covariates will be removed from the model. Will report the estimates and associated 95% confidence intervals as (1) relative risk or (2) rate ratio.

  3. Change in quality of life

    Time frame: Baseline up to 52 weeks

    Will be evaluated by Functional Assessment of Cancer Therapy-Prostate Trial Outcome Index score.

Sponsors and collaborators

Lead sponsor

University of Rochester

Other

Collaborators

  • National Cancer Institute (NCI)

Registry information

Official study title

High-dose Vitamin D Supplementation for ADT-Induced Bone Loss in Older Prostate Cancer Patients

Acronym: ViPER

Important dates

Study start
2023
Primary completion
2029
Study completion
2029
First posted
May 1, 2023
Registry last updated
Jan 15, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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