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A Study of NOX66 and External Beam Radiotherapy in Patients With Metastatic Castration-resistant Prostate Cancer and Other Solid Tumors

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT04957290
Recruitment Status : Recruiting
First Posted : July 12, 2021
Last Update Posted : November 16, 2021
Sponsor:
Information provided by (Responsible Party):
Noxopharm Limited

Brief Summary:
This is a Phase 1b/Phase 2a, open-label, multicenter study to determine the safety, tolerability, recommended Phase 2 dose (RP2D), efficacy, pharmacokinetics (PK) and pharmacodynamic (PD) properties of idronoxil when rectally administered as a suppository (NOX66) to patients with any solid tumor (Part 1) and patients with metastatic castration-resistant prostate cancer (mCRPC), breast cancer (BC) and non-small-cell lung cancer (NSCLC) (Part 2) who are eligible for low-dose external beam radiotherapy (EBRT) for at least one symptomatic or minimally symptomatic lesion (for the prevention of symptoms).

Condition or disease Intervention/treatment Phase
Metastatic Castration-resistant Prostate Cancer and Other Solid Tumors Drug: NOX66 Radiation: EBRT Phase 1 Phase 2

Detailed Description:
The study is divided into 2 parts: Part 1 (dose escalation) and Part 2 (dose expansion). The study design allows an exploration of different doses of NOX66 (800 mg, 1200 mg, 1600 mg and 2400 mg) with safety monitoring to ensure the safety of the patients. In Cycle 1, NOX66 will be administered for 14 days followed by a 7-day rest period on a 21-day cycle. From Cycle 2 onwards, NOX66 will be administered for 7 days followed by a 7-day rest period on a 14-day cycle. Patients will continue to receive NOX66 on a cyclical basis until disease progression, unacceptable toxicity, withdrawal of consent, start of a new anticancer therapy, withdrawal of the patient by the Investigator or termination of the study by the Sponsor.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 100 participants
Allocation: Non-Randomized
Intervention Model: Sequential Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase 1b/2a Multicenter Study of NOX66 and External Beam Radiotherapy in Patients With Metastatic Castration-resistant Prostate Cancer and Other Solid Tumors
Actual Study Start Date : October 25, 2021
Estimated Primary Completion Date : October 31, 2022
Estimated Study Completion Date : February 28, 2024

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Prostate Cancer

Arm Intervention/treatment
Experimental: Part 1: Dose Cohort 1: NOX66 800 mg Drug: NOX66
NOX66 800 mg daily (400 mg suppository twice daily [BID]).

Radiation: EBRT
The dose levels of EBRT will be either 8 Gy as a single fraction, or 20/25 Gy as 5 fractions given over 5 to 10 days.

Experimental: Part 1: Dose Cohort 2: NOX66 1200 mg Drug: NOX66
NOX66 1200 mg daily (600 mg suppository BID).

Radiation: EBRT
The dose levels of EBRT will be either 8 Gy as a single fraction, or 20/25 Gy as 5 fractions given over 5 to 10 days.

Experimental: Part 1: Dose Cohort 3: NOX66 1600 mg Drug: NOX66
NOX66 1600 mg daily (800 mg suppository BID).

Radiation: EBRT
The dose levels of EBRT will be either 8 Gy as a single fraction, or 20/25 Gy as 5 fractions given over 5 to 10 days.

Experimental: Part 1: Dose Cohort 4: NOX66 2400 mg Drug: NOX66
NOX66 2400 mg daily (1200 mg suppository BID).

Radiation: EBRT
The dose levels of EBRT will be either 8 Gy as a single fraction, or 20/25 Gy as 5 fractions given over 5 to 10 days.

Experimental: Part 2: Arm 1: Patients with mCRPC (RP2D NOX66) Drug: NOX66
NOX66 RP2D

Radiation: EBRT
The dose levels of EBRT will be either 8 Gy as a single fraction, or 20/25 Gy as 5 fractions given over 5 to 10 days.

Experimental: Part 2: Arm 2: Patients with BC and NSCLC (RP2D NOX66) Drug: NOX66
NOX66 RP2D

Radiation: EBRT
The dose levels of EBRT will be either 8 Gy as a single fraction, or 20/25 Gy as 5 fractions given over 5 to 10 days.




Primary Outcome Measures :
  1. Part 1 (Dose Escalation): Number of dose-limiting toxicities (DLTs) [ Time Frame: Cycle 1 (Day 1 to Day 21) ]
    Determination of the maximum tolerated dose (MTD) and RP2D of NOX66 in combination with low-dose EBRT in patients with any solid tumor. MTD is defined as the dose level at which no more than 1 patient out of 6 experiences a DLT at the end of Cycle 1. RP2D is the highest dose administered at which no more than 1 patient out of 6 experiences a DLT at the end of Cycle 1 and the dosage form, including the dosing frequency, is acceptable to patients.

  2. Part 2 (Dose Expansion): Arm 1 (mCRPC only): Number of patients with change from Baseline in prostate-specific antigen (PSA) at the end of Cycles 3 and 6 [ Time Frame: At the end of Cycle 3 (Week 7) & Cycle 6 (Week 13) ]
    Evaluation of the effect of NOX66 on PSA response in patients with mCRPC. PSA response is defined as the proportion of patients with a reduction in PSA in plasma (ng/mL) of ≥ 30% from baseline at the end of Cycles 3 and 6.

  3. Part 2 (Dose Expansion): Arm 2: Disease control rate (DCR) [ Time Frame: Up to 14 months ]
    Evaluation of the effect of NOX66 on DCR in patients with BC and NSCLC. DCR is measured by the percentage of patients with a best overall confirmed response of complete response (CR) or partial response (PR) at any time plus stable disease (SD) from first dose administration until disease progression or death due to any cause or the start of new anticancer therapy.


Secondary Outcome Measures :
  1. Part 1 and Part 2: Incidence of adverse events (AEs) for NOX66 [ Time Frame: From Screening (Days -28 to -2) until the Follow-up visit (up to 30 months) ]
    Characterization of the safety and tolerability of NOX66.

  2. Part 1 and Part 2: Incidence of AEs related to 2 dose levels of EBRT [ Time Frame: From Screening (Days -28 to -2) until the Follow-up visit (up to 30 months) ]
    Evaluation of the safety and tolerability of both doses of EBRT (8 Gy or 20/25 Gy).

  3. Maximum observed concentration (Cmax) for idronoxil and selected metabolites [ Time Frame: Days 1, 2, 6, 14 and 15 of Cycle 1 (21-day Cycle), and Days 1 and 8 of Cycles 2 and 3 (14-day Cycles) ]
    Evaluation of the exposure of idronoxil.

  4. Time to first occurrence of Cmax (Tmax) for idronoxil and selected metabolites [ Time Frame: Days 1, 2, 6, 14 and 15 of Cycle 1 (21-day Cycle), and Days 1 and 8 of Cycles 2 and 3 (14-day Cycles) ]
    Evaluation of the exposure of idronoxil.

  5. Area under the concentration-time curve (AUC) from time zero (predose) to time of last quantifiable concentration (AUC(0-t)) for idronoxil and selected metabolites [ Time Frame: Days 1, 2, 6, 14 and 15 of Cycle 1 (21-day Cycle), and Days 1 and 8 of Cycles 2 and 3 (14-day Cycles) ]
    Evaluation of the exposure of idronoxil.

  6. AUC from time zero (predose) to 6 hours postdose (AUC(0-6)) for idronoxil and selected metabolites [ Time Frame: Days 1, 2, 6, 14 and 15 of Cycle 1 (21-day Cycle), and Days 1 and 8 of Cycles 2 and 3 (14-day Cycles) ]
    Evaluation of the exposure of idronoxil.

  7. AUC from time zero (predose) to 12 hours postdose (AUC(0-12)) for idronoxil and selected metabolites [ Time Frame: Days 1, 2, 6, 14 and 15 of Cycle 1 (21-day Cycle), and Days 1 and 8 of Cycles 2 and 3 (14-day Cycles) ]
    Evaluation of the exposure of idronoxil.

  8. AUC from time zero (predose) extrapolated to infinity (AUC(0-inf)) for idronoxil and selected metabolites [ Time Frame: Days 1, 2, 6, 14 and 15 of Cycle 1 (21-day Cycle), and Days 1 and 8 of Cycles 2 and 3 (14-day Cycles) ]
    Evaluation of the exposure of idronoxil.

  9. Minimum observed concentration (Cmin) for idronoxil and selected metabolites [ Time Frame: Days 1, 2, 6, 14 and 15 of Cycle 1 (21-day Cycle), and Days 1 and 8 of Cycles 2 and 3 (14-day Cycles) ]
    Evaluation of the exposure of idronoxil.

  10. Terminal phase half-life (t½) for idronoxil and selected metabolites [ Time Frame: Days 1, 2, 6, 14 and 15 of Cycle 1 (21-day Cycle), and Days 1 and 8 of Cycles 2 and 3 (14-day Cycles) ]
    Evaluation of the exposure of idronoxil.

  11. Part 1 and Part 2: Number of patients (mCRPC only) with change from Baseline in PSA at any time point [ Time Frame: Screening, Day 1 of Cycles 1 to 3, every second cycle thereafter, at End of Treatment (EOT)/ Early Discontinuation (ED) Visit, at the 6, 9 and 12 month Follow-up visits (Cycle 1:21-day Cycle, Cycle 2 onwards:14-day Cycles) (up to 30 months) ]
    Evaluation of the preliminary clinical efficacy of NOX66 plus low-dose EBRT in patients with mCRPC.

  12. Part 1 and Part 2: Overall response rate (ORR) [ Time Frame: Every 8 weeks (± 7 days) from the first dose administration up to Week 26, and every 12 weeks (± 7 days) thereafter until disease progression (up to 30 months) ]
    Evaluation of the preliminary clinical efficacy of NOX66 plus low-dose EBRT in patients with mCRPC and other solid tumors. The ORR, defined as the percentage of patients with CR and PR, will be assessed based on change from baseline imaging (Response Evaluation Criteria in Solid Tumors [RECIST] v1.1 [all tumor types] and Prostate Cancer Working Group 3 [PCWG3] criteria [mCRPC] for measurable or evaluable lesions).

  13. Part 1 and Part 2: Duration of response [ Time Frame: Up to 30 months ]
    Evaluation of the preliminary clinical efficacy of NOX66 plus low-dose EBRT in patients with mCRPC and other solid tumors. Duration of response is defined as the time from the first documented overall response of CR, PR or SD to the first documented overall response of progressive disease.

  14. Part 1 and Part 2: Change from Baseline in Eastern Cooperative Oncology Group (ECOG) scores [ Time Frame: Screening, Day 1 of Cycles 1 to 3, every second cycle thereafter (i.e., Cycles 5, 7, 9, 11 etc.) and the EOT/ED Visit (Cycle 1:21-day Cycle, Cycle 2 onwards:14-day Cycles) (Up to 30 months) ]
    Evaluation of the preliminary clinical efficacy of NOX66 plus low-dose EBRT in patients with mCRPC and other solid tumors. ECOG is a 6-point scale where 0= Fully active, 1= Restricted in physically strenuous activity, 2=Up and about more than 50% of waking hours, 3= Capable of only limited selfcare, confined to a bed or chair more than 50% of waking hours, 4= Completely disabled, and 5=Dead. Higher scores mean a worse outcome.

  15. Part 1 and Part 2: Change from Baseline in tumor size [ Time Frame: Screening, every 8 weeks (± 7 days) from the first study dose administration up to Week 26, and every 12 weeks (± 7 days) thereafter until disease progression, withdrawal of consent, initiation of new anticancer therapy or death (up to 30 months) ]
    Evaluation of the preliminary clinical efficacy of NOX66 plus low-dose EBRT in patients with mCRPC and other solid tumors.

  16. Part 1 and Part 2: Change from Baseline in tumor number [ Time Frame: Screening, every 8 weeks (± 7 days) from the first study dose administration up to Week 26, and every 12 weeks (± 7 days) thereafter until disease progression, withdrawal of consent, initiation of new anticancer therapy or death (up to 30 months) ]
    Evaluation of the preliminary clinical efficacy of NOX66 plus low-dose EBRT in patients with mCRPC and other solid tumors.

  17. Part 2: Arm 1: Progression-free survival (PFS) [ Time Frame: Every 8 weeks (± 7 days) from the first dose administration up to Week 26, and every 12 weeks (± 7 days) thereafter until disease progression according to RECIST v1.1 criteria (up to 30 months) ]
    Evaluation of the preliminary clinical efficacy of NOX66 plus low-dose EBRT in patients with mCRPC. Progression-free survival is defined as the duration of time from first dose administration to date of disease progression is objectively documented, including tumor progression, early discontinuation or death prior to data cut off.

  18. Part 2: Arm 1: Overall survival (OS) [ Time Frame: Up to 30 months ]
    Evaluation of the preliminary clinical efficacy of NOX66 plus low-dose EBRT in patients with mCRPC. Overall survival is defined as time from the date of first dose administration to date of death due to any cause.

  19. Part 1 and Part 2: Change from baseline in pain scores based on the Brief Pain Inventory - Short Form (BPI-SF) questionnaire [ Time Frame: Screening, on Day 1 of Cycles 3 and 5, followed by every 4 cycles thereafter (e.g., Cycle 9, Cycle 13 etc.), and at the EOT/ED Visit (each cycle is 14 days) (Up to 30 months) ]
    The effects of NOX66 on pain and other cancer-related signs and symptoms will be explored. Worst pain, general pain and pain's interference with daily life will be assessed during the study drug using the BPI-SF. The BPI-SF comprises a total of 15 items measuring 2 domains: pain severity and pain interference. Items measuring pain severity (including 'worst pain') are rated on an 11 point numeric rating scale ranging from 0=No pain to 10=Pain as bad as you can imagine. Higher scores mean a worse outcome.

  20. Part 1 and Part 2: Number of patients with skeletal-related events (SREs) and symptomatic skeletal events (SSEs) [ Time Frame: Up to 30 months ]
    The effects of NOX66 on pain and other cancer-related signs and symptoms will be explored. Skeletal-related events and SSEs will be evaluated based on the patient's clinical history and examinations, including but not limited to incidence of fractures and pain.

  21. Part 1 and Part 2: Change of dose of morphine administration and analgesic use [ Time Frame: Up to 30 months ]
    The effects of NOX66 on pain and other cancer-related signs and symptoms will be explored. The dose of morphine administration and analgesic use will be assessed based on the patient's concomitant medication use assessment.

  22. Part 1 and Part 2: Change of frequency of morphine administration and analgesic use [ Time Frame: Up to 30 months ]
    The effects of NOX66 on pain and other cancer-related signs and symptoms will be explored. The frequency of morphine administration and analgesic use will be assessed based on the patient's concomitant medication use assessment.

  23. Part 1 and Part 2: Quality of life (QoL) as assessed by change from Baseline in Patient Experience Questionnaire (PEQ) [ Time Frame: Day 2 of Cycle 1 (21-day Cycle), Day 1 of Cycle 3 (14-day Cycle) and at the EOT/ED Visit (up to 30 months) ]
    The Sponsor has developed a questionnaire to evaluate the patient's experience with the suppository dosage form. This will consist of a set of 10 questions, with some questions requiring simple yes or no answers, and other questions are to be rated on a scale of 10 (range 1 to 10) where higher scores mean a worse outcome.

  24. Part 1 and Part 2: QoL as assessed by change from Baseline in European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire for Cancer Patients (EORTC-QLQ-C30) [ Time Frame: Screening, on Day 1 of Cycles 3 and 5, followed by every 4 cycles thereafter (e.g., Cycle 9, Cycle 13 etc.), and at the EOT/ED Visit (each cycle is 14 days) (up to 30 months) ]
    The questionnaire assesses important functioning domains (e.g., physical, emotional, social) and common cancer symptoms (e.g., fatigue, pain, nausea, vomiting, appetite loss). The instrument is composed of 30 items. All symptom scales range from 1-4 with higher values representing higher levels of symptoms, except for the items that evaluate overall quality of life which are rated on a 7-point scale (range 1-7) where higher score represent a better quality of life.

  25. Part 1 and Part 2: QoL as assessed by change from Baseline in Functional Assessment of Cancer Therapy - Prostate (FACT-P) (mCRPC only) [ Time Frame: Screening, on Day 1 of Cycles 3 and 5, followed by every 4 cycles thereafter (e.g., Cycle 9, Cycle 13 etc.), and at the EOT/ED Visit (each cycle is 14 days) (up to 30 months) ]
    The FACT-P questionnaire is a relevant, worldwide tool used for assessing the health-related QoL in men with prostate cancer. The FACT-P is a 39-item questionnaire composed of the FACT-General (FACT-G) original subscales (Physical Well-being, Social/Family Well-being, Emotional Well-being and Functional Well-being) and a Prostate Cancer Subscale. Each item is rated on a 5-point scale ranging from 0 (not at all) to 4 (very much). A higher score indicates a better QoL.



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Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Patient has a minimum life expectancy of 6 months
  • Histological or cytological confirmation of prostate cancer, BC, NSCLC and any other solid tumors
  • Confirmed metastatic disease by imaging
  • Documented disease progression following first or later lines of anticancer systemic treatment
  • Patient is eligible for low-dose EBRT for at least one lesion
  • Patients with prior RT are eligible, only if there is no potential for field overlap between the prior RT and the planned RT
  • For patients with BC or NSCLC: Patient must have at least one measurable lesion as per RECIST v1.1 (in Part 2 only)
  • Patient has ECOG performance status of 0 to 2
  • Adequate bone marrow, renal, and liver function
  • Metastatic Castration-resistant Prostate Cancer: Baseline testosterone levels ≤ 14.4 ng/dL and ongoing medical castration must be maintained throughout the duration of the study; patient has evidence of symptomatic and/or progressive disease
  • Breast Cancer Patients: Known hormone receptor status (estrogen receptors/progesterone receptors or estrogen receptors alone). Breast cancer patients are allowed to be on background hormonal treatment.

Exclusion Criteria:

  • Patient has tumor involvement of the central nervous system
  • Impaired cardiac functioning or clinically significant cardiac disease
  • Uncontrolled hypertension despite two concomitant antihypertensive therapies
  • Patients who have had a colectomy (total or left hemicolectomy) with re-anastomosis
  • Patients for whom administration of the suppositories are likely to cause pain or difficulties in absorption
  • Patients with fecal impaction or uncontrolled irritable bowel disease
  • Patients with inflammatory bowel disease
  • Any other disease, metabolic dysfunction, physical examination finding or clinical laboratory finding that, in the Investigator's opinion, gives reasonable suspicion of a disease or condition that contraindicates the use of an investigational drug, may affect the interpretation of the results, render the patient at high risk from treatment complications or interferes with obtaining informed consent
  • Patients with oligometastatic disease (fewer than 5 metastatic lesions) amenable to standard therapy will be excluded
  • Patients who have had RT to the region of the rectum or will require RT to the region of the rectum during the trial
  • Uncontrolled active infection requiring intravenous antibiotic, antiviral or anti-fungal medications within 14 days before the first dose administration
  • Receiving or having received anticancer treatment
  • Patient has received corticosteroids at a dose of > 10 mg prednisone/day or equivalent for any reason within 4 weeks prior to receiving the first dose administration
  • Patient is not willing to use suppositories
  • Patient has a positive reverse transcription polymerase chain reaction (RT-PCR) test for severe acute respiratory coronavirus 2 (SARS-CoV-2) prior to Screening or enrollment, or has clinical signs and symptoms consistent with SARS-CoV-2 infection; e.g., fever, dry cough, dyspnea, sore throat, fatigue or positive SARS-CoV-2 test result within 2 weeks prior to Screening.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04957290


Contacts
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Contact: Gisela Mautner, MD, PhD 61 2 91442223 Gisela.Mautner@noxopharm.com

Locations
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United States, California
Beverly Hills Cancer Center Recruiting
Beverly Hills, California, United States, 90211
Contact: Gabayan Afshin         
United States, Texas
The University of Texas - MD Anderson Cancer Center - Genitourinary (GU) Cancer Center Recruiting
Houston, Texas, United States, 77030
Contact: Dr. Chad Tang         
Sponsors and Collaborators
Noxopharm Limited
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Responsible Party: Noxopharm Limited
ClinicalTrials.gov Identifier: NCT04957290    
Other Study ID Numbers: NOX66-005
First Posted: July 12, 2021    Key Record Dates
Last Update Posted: November 16, 2021
Last Verified: November 2021
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Noxopharm Limited:
Dose Escalation
Dose Expansion
Prostate-specific antigen
Maximum tolerated dose
Recommended Phase 2 dose
Additional relevant MeSH terms:
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Prostatic Neoplasms
Genital Neoplasms, Male
Urogenital Neoplasms
Neoplasms by Site
Neoplasms
Prostatic Diseases