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Docetaxel With or Without Ascorbic Acid in Treating Patients With Metastatic Prostate Cancer

A Randomized Phase 2 Trial of Ascorbic Acid in Combination With Docetaxel in Men With Metastatic Prostate Cancer

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02516670
Enrollment
50
Registered
2015-08-06
Start date
2016-06-20
Completion date
2021-10-14
Last updated
2023-06-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hormone-Resistant Prostate Cancer, Metastatic Prostate Carcinoma, Stage IV Prostate Cancer

Brief summary

This randomized phase II trial studies how well docetaxel works when given with or without ascorbic acid in treating patients with prostate cancer that has spread to other places in the body. Drugs used in chemotherapy, such as docetaxel, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Ascorbic acid (vitamin C) is a water-soluble vitamin that may help inhibit the growth of cancer cells. It is not yet known whether docetaxel works better when given with or without ascorbic acid in treating prostate cancer.

Interventions

DIETARY_SUPPLEMENTAscorbic Acid

Given IV

DRUGDocetaxel

Given IV

OTHERLaboratory Biomarker Analysis

Correlative studies

OTHERPharmacological Study

Correlative studies

OTHERPlacebo

Given IV

OTHERQuality-of-Life Assessment

Ancillary studies

Sponsors

National Cancer Institute (NCI)
CollaboratorNIH
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
MALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Have metastatic castration-resistant prostate cancer (prostate cancer progressing despite castrate levels of testosterone \[\< 50 ng/dL\] using standard measures of progression defined by Prostate Cancer Working Group 2), are chemo-naïve for metastatic castration-resistant prostate cancer (mCRPC); patients must have symptomatic disease or visceral metastases or otherwise be eligible for docetaxel treatment per investigator judgment (e.g. for progression on imaging or rapidly rising PSA despite 2nd line hormonal treatment); * Note: Six cycles of prior docetaxel are allowed in hormone-sensitive disease, per Eastern Cooperative Oncology Group (ECOG) 3805 data and have been off of docetaxel for at least 12 months * Have a pathological diagnosis of prostate carcinoma * Patients may be receiving continuous hormonal ablation with surgical or medical castration with baseline testosterone \< 50 ng/dL * Patient may be receiving bone targeted agents * Have evaluable disease by Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 and/or Prostate Cancer Working Group 2 (PCWG2) criteria * Have ECOG performance status 0-1 * Have an estimated life expectancy \> 4 months * Absolute neutrophil count \>= 1500/mm\^3 * Platelets \>= 100,000/mm\^3 * Hemoglobin \>= 9 g/dL * Total bilirubin =\< 1.0 upper limit of normal (ULN) * Aspartate aminotransferase (AST)(serum glutamic oxaloacetic transaminase \[SGOT\])/alanine aminotransferase (ALT)(serum glutamate pyruvate transaminase \[SGPT\]) =\< 2.5 x ULN * Creatinine =\< 1.6 mg/dl (for patients with \> 1.6 mg/dl, calculated or measured creatinine clearance must be \>= 55 mL/minute \[Cockcroft-Gault\]) * Men of reproductive potential and those who are surgically sterilized (i.e., postvasectomy) must agree to practice effective barrier contraception that has an expected failure rate of \< 1% during and for 30 days after discontinuation of study treatment * If condoms are used as a barrier contraceptive, a spermicidal agent should be added to ensure that pregnancy does not occur * Have the ability to understand, and have given written informed consent before performance of any study-related procedure not part of normal medical care, with the understanding that consent may be withdrawn by the subject at any time without prejudice to future medical care

Exclusion criteria

* Have had known active central nervous system (CNS) metastases and/or carcinomatous meningitis; subjects with previously treated brain metastases may participate provided they are stable (without evidence of progression by imaging for at least four weeks prior to the first dose of trial treatment and any neurologic symptoms have returned to baseline), have no evidence of new or enlarging brain metastases, and are not using steroids for CNS involvement for at least one week prior to trial treatment; patients with primary brain tumors are not eligible; however, as patients are completing abiraterone therapy, they will be allowed to continue up to 10 mg/day of prednisone * Have had prior chemotherapy for metastatic disease in castration-resistant prostate cancer (prior chemotherapy for hormone-sensitive disease, more than twelve months prior to registration, is acceptable) * Have had had surgery within four weeks of dosing of investigational agent, excluding minor procedures (dental work, skin biopsy, etc.), celiac plexus block, and biliary stent placement * Have had palliative radiation or biological cancer therapy within 2 weeks prior to the first dose of study drug * Have received other investigational drugs within 28 days prior to enrollment * Is expected to require any other form of systemic or localized antineoplastic therapy while on study * Patients who require frequent (several times a day) monitoring of their blood glucose or patients who have recently been hospitalized for glucose control * Are being treated with anticoagulation therapy (aspirin and nonsteroidal anti-inflammatory drugs \[NSAIDS\] are allowed) * The subject requires concomitant treatment with the following inhibitors of cytochrome P450, family 3, subfamily A, polypeptide 4 (CYP3A4): * Antibiotics: clarithromycin, erythromycin, telithromycin, troleandomycin * Antifungals: itraconzaole, ketoconazole, voriconazole, fluconazole, posaconazole * Antidepressants: nefazodone * Antidiuretic: conivaptan * Anti-retrovirals: delaviridine or protease inhibitors (ritonavir, indinavir, lopinavir/ritonavir, saquinavir, nelfinavir) or cobicistat-boosted antiretrovirals * Gastrointestinal (GI): cimetidine, aprepitant * Hepatitis C: boceprevir, telaprevir * Miscellaneous: Seville oranges, grapefruit, or grapefruit juice and/or pummelos, star fruit, exotic citrus fruits, or grapefruit hybrids * Have uncontrolled intercurrent illness, including but not limited to ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements * Has glucose-6-phosphate dehydrogenase (G6PD) deficiency * Have end stage renal disease * Has history of calcium oxalate stones * Has history of iron overload * Have a known history of human immunodeficiency virus (HIV) (HIV 1/2 antibodies) * Have a know active uncontrolled hepatitis B, or hepatitis C infection

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With Adverse EventsUp to 30 days after the last dose of study drugNumber of participants experiencing fatigue, nausea, bone pain, and anorexia as defined by CTCAE 4.0
Number of Participates With a Decline in Prostate-specific Antigen From Their Baseline Measurementup to 24 weeksprostate-specific antigen decline will be defined as ≥ 50% from baseline measurement

Secondary

MeasureTime frameDescription
Number of Serious Adverse EventsUp to 30 days after last dose of study drugNumber of serious adverse events of all types as defined by Common Terminology Criteria for Adverse Events 4.0. A serious adverse event is an undesirable sign, symptom, or medical condition that: * Results in death * Is life threatening * Requires inpatient hospitalization or causes prolongation of existing hospitalization for \>24 hours * Results in persistent or significant disability/incapacity * Is a congenital anomaly/birth defect * Is an important medical event
Number of Participates Experiencing Serious Adverse Events (SAE)Up to 24 weeksNumber of serious adverse events defined as grade 3 or higher (fatigue, nausea, bone pain, and anorexia) in participates as defined by CTCAE 4.0
Average Number of Times Docetaxel Had Dose ReductionsUp to 24 weeksThe number of dose reductions and total number of completed cycles will be summarized by study arm.
Change in Quality of Life (QoL) as Measured by the FACT-P QuestionnaireUp to course 6 of therapy (18 weeks)The (FACT-P) is made up of 39 question, with the total score ranging between 0 and 156 with 0 being the best and 156 as the worst.
Radiographic Progression Free Survival (rPFS)Up to 3 yearsTo determine the rPFS of participates that receive at least one dose of ascorbic acid compared to those who received placebo

Other

MeasureTime frameDescription
F2-isoprostanes, a Pharmacodynamic Measure of Oxidant Injury in VivoUp to course 6 (18 weeks)Correlative analyses will assess the association between ascorbic acid and lipid peroxidation (F2-isoprostanes) in the two study arms, globally, and over time. Comparisons of ascorbic acid and F2-isoprostanes by study arm at cycle 1, cycle 2, cycle 4 and cycle 6, accounting for baseline measures obtained from the same patient, will be made by taking differences between post baseline and baseline values and comparing these differences between arms of the study with t-tests. Regression will also be used to assess the association between F2-isoprostane and ascorbic acid at cycle 4 and at cycle 6.
Effect of Ascorbic Acid on Docetaxel ExposureUp to 24 weeksTo determine whether ascorbic acid alters docetaxel exposure and compare between treatment arms, pharmacokinetics samples will be collected prior to, during, and after ascorbic acid and docetaxel infusions.
Peak and Trough Ascorbic Acid LevelsUp to 24 weeks

Countries

United States

Participant flow

Pre-assignment details

12 subjects were Screen fails

Participants by arm

ArmCount
Arm A (Docetaxel, Ascorbic Acid)
Patients receive docetaxel IV on day 1 and ascorbic acid IV twice weekly. The first ascorbic acid treatment will be given on day 1 (same day as docetaxel). Treatment repeats every 21 days for 8 courses in the absence of disease progression or unacceptable toxicity. Ascorbic Acid: Given IV Docetaxel: Given IV Laboratory Biomarker Analysis: Correlative studies Pharmacological Study: Correlative studies Quality-of-Life Assessment: Ancillary studies
34
Arm B (Docetaxel, Placebo)
Patients receive docetaxel IV on day 1 and placebo IV twice weekly.The first placebo treatment will be given on day 1 (same day as docetaxel). Treatment repeats every 21 days for 8 courses in the absence of disease progression or unacceptable toxicity. Docetaxel: Given IV Laboratory Biomarker Analysis: Correlative studies Pharmacological Study: Correlative studies Placebo: Given IV Quality-of-Life Assessment: Ancillary studies
16
Total50

Baseline characteristics

CharacteristicArm A (Docetaxel, Ascorbic Acid)TotalArm B (Docetaxel, Placebo)
Age, Continuous70 years70 years69 years
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants0 Participants0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
31 Participants47 Participants16 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
3 Participants3 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
1 Participants1 Participants0 Participants
Race (NIH/OMB)
Black or African American
5 Participants11 Participants6 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants1 Participants0 Participants
Race (NIH/OMB)
White
27 Participants37 Participants10 Participants
Region of Enrollment
United States
34 Participants50 Participants16 Participants
Sex: Female, Male
Female
0 Participants0 Participants0 Participants
Sex: Female, Male
Male
34 Participants50 Participants16 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 340 / 16
other
Total, other adverse events
34 / 3416 / 16
serious
Total, serious adverse events
8 / 343 / 16

Outcome results

Primary

Number of Participants With Adverse Events

Number of participants experiencing fatigue, nausea, bone pain, and anorexia as defined by CTCAE 4.0

Time frame: Up to 30 days after the last dose of study drug

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Arm A (Docetaxel, Ascorbic Acid)Number of Participants With Adverse Eventsbone pain2 Participants
Arm A (Docetaxel, Ascorbic Acid)Number of Participants With Adverse Eventsnausea17 Participants
Arm A (Docetaxel, Ascorbic Acid)Number of Participants With Adverse Eventsanorexia12 Participants
Arm A (Docetaxel, Ascorbic Acid)Number of Participants With Adverse Eventsfatigue25 Participants
Arm B (Docetaxel, Placebo)Number of Participants With Adverse Eventsanorexia2 Participants
Arm B (Docetaxel, Placebo)Number of Participants With Adverse Eventsnausea6 Participants
Arm B (Docetaxel, Placebo)Number of Participants With Adverse Eventsbone pain2 Participants
Arm B (Docetaxel, Placebo)Number of Participants With Adverse Eventsfatigue11 Participants
Primary

Number of Participates With a Decline in Prostate-specific Antigen From Their Baseline Measurement

prostate-specific antigen decline will be defined as ≥ 50% from baseline measurement

Time frame: up to 24 weeks

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Arm A (Docetaxel, Ascorbic Acid)Number of Participates With a Decline in Prostate-specific Antigen From Their Baseline Measurement13 Participants
Arm B (Docetaxel, Placebo)Number of Participates With a Decline in Prostate-specific Antigen From Their Baseline Measurement5 Participants
Secondary

Average Number of Times Docetaxel Had Dose Reductions

The number of dose reductions and total number of completed cycles will be summarized by study arm.

Time frame: Up to 24 weeks

ArmMeasureValue (MEAN)
Arm A (Docetaxel, Ascorbic Acid)Average Number of Times Docetaxel Had Dose Reductions7 dose reductions
Arm B (Docetaxel, Placebo)Average Number of Times Docetaxel Had Dose Reductions9 dose reductions
Secondary

Change in Quality of Life (QoL) as Measured by the FACT-P Questionnaire

The (FACT-P) is made up of 39 question, with the total score ranging between 0 and 156 with 0 being the best and 156 as the worst.

Time frame: Up to course 6 of therapy (18 weeks)

ArmMeasureValue (MEAN)
Arm A (Docetaxel, Ascorbic Acid)Change in Quality of Life (QoL) as Measured by the FACT-P Questionnaire116.4580 score on a scale
Arm B (Docetaxel, Placebo)Change in Quality of Life (QoL) as Measured by the FACT-P Questionnaire113.9834 score on a scale
Secondary

Number of Participates Experiencing Serious Adverse Events (SAE)

Number of serious adverse events defined as grade 3 or higher (fatigue, nausea, bone pain, and anorexia) in participates as defined by CTCAE 4.0

Time frame: Up to 24 weeks

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Arm A (Docetaxel, Ascorbic Acid)Number of Participates Experiencing Serious Adverse Events (SAE)fatigue0 Participants
Arm A (Docetaxel, Ascorbic Acid)Number of Participates Experiencing Serious Adverse Events (SAE)nausea0 Participants
Arm A (Docetaxel, Ascorbic Acid)Number of Participates Experiencing Serious Adverse Events (SAE)bone pain0 Participants
Arm A (Docetaxel, Ascorbic Acid)Number of Participates Experiencing Serious Adverse Events (SAE)anorexia1 Participants
Arm B (Docetaxel, Placebo)Number of Participates Experiencing Serious Adverse Events (SAE)anorexia0 Participants
Arm B (Docetaxel, Placebo)Number of Participates Experiencing Serious Adverse Events (SAE)fatigue0 Participants
Arm B (Docetaxel, Placebo)Number of Participates Experiencing Serious Adverse Events (SAE)bone pain0 Participants
Arm B (Docetaxel, Placebo)Number of Participates Experiencing Serious Adverse Events (SAE)nausea0 Participants
Secondary

Number of Serious Adverse Events

Number of serious adverse events of all types as defined by Common Terminology Criteria for Adverse Events 4.0. A serious adverse event is an undesirable sign, symptom, or medical condition that: * Results in death * Is life threatening * Requires inpatient hospitalization or causes prolongation of existing hospitalization for \>24 hours * Results in persistent or significant disability/incapacity * Is a congenital anomaly/birth defect * Is an important medical event

Time frame: Up to 30 days after last dose of study drug

ArmMeasureGroupValue (NUMBER)
Arm A (Docetaxel, Ascorbic Acid)Number of Serious Adverse Eventsgrade 24 events
Arm A (Docetaxel, Ascorbic Acid)Number of Serious Adverse Eventsgrade 43 events
Arm A (Docetaxel, Ascorbic Acid)Number of Serious Adverse Eventsgrade 318 events
Arm A (Docetaxel, Ascorbic Acid)Number of Serious Adverse Eventsgrade 50 events
Arm A (Docetaxel, Ascorbic Acid)Number of Serious Adverse Eventsgrade 10 events
Arm B (Docetaxel, Placebo)Number of Serious Adverse Eventsgrade 50 events
Arm B (Docetaxel, Placebo)Number of Serious Adverse Eventsgrade 10 events
Arm B (Docetaxel, Placebo)Number of Serious Adverse Eventsgrade 20 events
Arm B (Docetaxel, Placebo)Number of Serious Adverse Eventsgrade 36 events
Arm B (Docetaxel, Placebo)Number of Serious Adverse Eventsgrade 40 events
Secondary

Radiographic Progression Free Survival (rPFS)

To determine the rPFS of participates that receive at least one dose of ascorbic acid compared to those who received placebo

Time frame: Up to 3 years

ArmMeasureValue (MEDIAN)
Arm A (Docetaxel, Ascorbic Acid)Radiographic Progression Free Survival (rPFS)10.12 months
Arm B (Docetaxel, Placebo)Radiographic Progression Free Survival (rPFS)9.97 months
Other Pre-specified

Effect of Ascorbic Acid on Docetaxel Exposure

To determine whether ascorbic acid alters docetaxel exposure and compare between treatment arms, pharmacokinetics samples will be collected prior to, during, and after ascorbic acid and docetaxel infusions.

Time frame: Up to 24 weeks

Other Pre-specified

F2-isoprostanes, a Pharmacodynamic Measure of Oxidant Injury in Vivo

Correlative analyses will assess the association between ascorbic acid and lipid peroxidation (F2-isoprostanes) in the two study arms, globally, and over time. Comparisons of ascorbic acid and F2-isoprostanes by study arm at cycle 1, cycle 2, cycle 4 and cycle 6, accounting for baseline measures obtained from the same patient, will be made by taking differences between post baseline and baseline values and comparing these differences between arms of the study with t-tests. Regression will also be used to assess the association between F2-isoprostane and ascorbic acid at cycle 4 and at cycle 6.

Time frame: Up to course 6 (18 weeks)

Other Pre-specified

Peak and Trough Ascorbic Acid Levels

Time frame: Up to 24 weeks

Source: ClinicalTrials.gov · Data processed: Feb 9, 2026