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Completed

NCT Number: NCT03618355

Trial of eRapa in Prostate Cancer Patients

This study is to determine the safety, pharmacokinetics/pharmacodynamics, and immunologic impact of encapsulated rapamycin in patients with low risk prostate cancer under active surveillance. There will be four groups of patients, each receiving a different dose of rapamycin.

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Key information

Conditions

Prostate Cancer Genital Diseases Genital Diseases, Male Genital Neoplasms, Male Male Urogenital Diseases Neoplasms Neoplasms by Site Prostatic Diseases Prostatic Neoplasms Urogenital Diseases Urogenital Neoplasms

Age range

18 year and older

Sex eligibility

Male

Study type

Interventional

Phase

Phase 1

Primary location

UT Health San Antonio

San Antonio, Texas, 78229, United States

About this study

This is a phase Ib trial of encapsulated rapamycin to determine safety, pharmacokinetics/pharmacodynamics, and immunologic impact in patients with low risk prostate cancer under active surveillance. This new formulation, encapsulated rapamycin (sirolimus), provides a more predictable bioavailability of this drug than [the other formulation]. The encapsulated and targeted rapamycin (eRapa) can be delivered at a consistent and lower dosage, not only improving the toxicity profile but also capitalizing on the newly appreciated mechanism of partial and/or intermittent mTOR inhibition, making eRapa an ideal immuno-oncologic and chemopreventative agent. Low dose rapamycin has been shown to prevent cancer formation, progression, and/or recurrence in the majority of cancer histologies including the most prevalent: lung, breast, prostate, and colon cancers.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

-

The patient must:

  • Have pathologically (histologically) proven diagnosis of prostate cancer with a Gleason score ≤7 (3+4) and already undergoing active surveillance
  • Be able to give informed consent
  • Be age 18 or older

Exclusion criteria

  • Prostate cancer with a Gleason score >7
  • Unable to give informed consent
  • Age < 18
  • Immunosuppressed state (e.g., HIV, use of chronic steroids)
  • Active, uncontrolled infections
  • On medications with strong inhibitors or inducers of CYP3A4 and or P-gp.
  • On agents known to alter rapamycin metabolism significantly (Appendix H)
  • Have another cancer requiring active treatment (except basal cell carcinoma or squamous cell carcinoma of the skin)
  • Individuals with a reported history of liver disease (e.g., cirrhosis)
  • Individuals who are not a good candidate for active surveillance in their treating physician's opinion
  • Have a medical condition (e.g., anemia, anticoagulated) for which repeated phlebotomy may be problematic.
  • Uncontrolled hypertension.
  • Individuals that have abnormal screening vital organ function prior to enrollment
  • Liver Function Test
  • Bilirubin >2.0
  • Alkaline phosphatase >5x upper limit of normal (ULN)
  • ALT/AST >2x ULN
  • Complete Blood Count:
  • WBC elevated above the normal standard per the testing laboratory
  • Hgb/Hct below the normal standards of the testing lab
  • Platelets below the normal standards of the testing lab
  • Total Cholesterol >240 mg/dL
  • Triglycerides > 200 mg/dL
  • Serum creatinine >2 and BUN >30
  • Urinary protein: proteinuria >1+ on urinalysis or >1 gm/24hr

Treatment and study plan

eRapa (encapsulated rapamycin)

Drug

The eRapa (encapsulated rapamycin) drug product consists of sub-micron rapamycin particles incorporated into poly(methyl methacrylate) polymer (Eudragit® L 100 / S 100).

This improved formulation and better bioavailability enables eRapa to consistently provide approximately 30% more drug than sirolimus (unpublished data). Improved and predictable delivery allows for consistent and sustained lower dosing, which will result in an improved toxicity profile since the latter is proven to be related to blood concentration levels. This is a phase Ib trial in low risk (Gleason score ≤7 (3+4)) prostate cancer patients under active surveillance to establish dosage safety and treatment levels.

Primary outcomes

  1. Primary Safety and Tolerability (Incidence of Treatment-Emergent Adverse Events)

    Time frame: After 4 weeks of treatment in each dosing cohort.

    To analyze the overall safety of eRapa by evaluating the number, frequency, duration, and relation of toxicity events as defined by the Common Terminology Criteria for Adverse Events (CTCAE) v4.03.

  2. Primary Safety and Tolerability (Incidence of Treatment-Emergent Adverse Events)

    Time frame: After completion of treatment, approximately 12 weeks, in each dosing cohort.

    To analyze the overall safety of eRapa by evaluating the number, frequency, duration, and relation of toxicity events as defined by the Common Terminology Criteria for Adverse Events (CTCAE) v4.03.

  3. Primary Safety and Tolerability (Incidence of Treatment-Emergent Adverse Events)

    Time frame: This will be completed after all dosing cohorts have been enrolled and treated, anticipated to occur at 1 year.

    To compare safety between dosing cohorts of eRapa by evaluating the number, frequency, duration, and relation of toxicity events as defined by the Common Terminology Criteria for Adverse Events (CTCAE) v4.03 at the 4 week time point.

  4. Primary Safety and Tolerability (Incidence of Treatment-Emergent Adverse Events)

    Time frame: This will be completed after all dosing cohorts have been enrolled and treated, anticipated to occur after 1 year.

    To compare safety between dosing cohorts of eRapa by evaluating the number, frequency, duration, and relation of toxicity events as defined by the Common Terminology Criteria for Adverse Events (CTCAE) v4.03 at the 12 week time point.

Secondary outcomes

  1. Secondary Pharmacokinetics: AUC

    Time frame: Cohorts 1 and 2 PK analysis will occur during the first week. Cohorts 3 and 4 PK analysis will occur during week 12 of treatment.

    Pharmacokinetics of eRapa in blood will be evaluated throughout the trial and compared within and between the dosing cohorts. For cohorts 1 and 2, single dose exposure curves will be generated by assessing the rapamycin levels in whole blood and spot card collection at 0, 0.5, 1, 2, 4, 6, 8, 24, 48, and 72 hrs after the first dose on week 1. Cohorts 3 and 4, exposure curves will be generated during the last week of treatment with blood draws and spot card collection after a dose during the final week at 0, 0.5, 1, 1.5, and 2 hrs.

  2. Secondary Pharmacokinetics: Exposure Trough Levels

    Time frame: Cohorts 3 and 4 PK analysis will occur during the first week of treatment.

    Pharmacokinetics of eRapa in blood will be evaluated throughout the trial and compared within and between the dosing cohorts. Cohorts 3 and 4, eRapa troughs will be gathered before the first 5 doses of eRapa during the week 1.

  3. Secondary Pharmacodynamics: mTOR inhibition in PBMC by assessment of phosphorylation of S6

    Time frame: Cohorts 1 and 2 PD analysis will occur during the first week. Cohorts 3 and 4 PD analysis will occur during week 12 of treatment.

    Pharmacodynamics of eRapa in blood will be evaluated throughout the trial and compared within and between dosing cohorts. For cohorts 1 and 2, mTOR inhibition in PBMC by assessment of phosphorylation of S6 will also be assessed at 0, 0.5, 1, 2, 4, 6, 8, 24, 48, and 72 hrs after the first dose on week 1. Cohorts 3 and 4, mTor inhibitions will be gathered before the first 5 doses of eRapa during the week 1. In addition, during the last week of treatment after a dose during the final week at 0, 0.5, 1, 1.5, and 2 hrs.

  4. Secondary Pharmacodynamics: mTOR inhibition upon initial dose

    Time frame: Cohorts 1 and 2 PD analysis will occur during the first week.

    Pharmacodynamics of eRapa in blood will be evaluated throughout the trial and compared within and between dosing cohorts. For cohorts 1 and 2, mTOR inhibition in PBMC by assessment of phosphorylation of S6 will also be assessed at 0, 0.5, 1, 2, 4, 6, 8, 24, 48, and 72 hrs after the first dose on week 1.

  5. Secondary Pharmacodynamics: mTOR inhibition first week of daily dosing

    Time frame: Cohorts 3 and 4 PD analysis will occur during week 12 of treatment.

    Pharmacodynamics of eRapa in blood will be evaluated throughout the trial and compared within and between dosing cohorts. For cohorts 3 and 4, mTOR inhibition in PBMC by assessment of phosphorylation of S6 will also be assessed before the first 5 doses of eRapa during the week 1.

  6. Secondary Pharmacodynamics: mTOR inhibition during final week of treatment

    Time frame: Cohorts 3 and 4 PD analysis will occur during week 12 of treatment.

    Pharmacodynamics of eRapa in blood will be evaluated throughout the trial and compared within and between dosing cohorts. For cohorts 3 and 4, mTOR inhibition in PBMC by assessment of phosphorylation of S6 will also be assessed during the last week of treatment after a dose during the final week at 0, 0.5, 1, 1.5, and 2 hrs.

  7. Secondary Immunologic Response: T cell phenotype individually

    Time frame: Assessments will occur at baseline, during (after 4 weeks), after short-term completion of treatment (after 12 weeks), and long-term completion of treatment (6 months).

    Immunologic response will be measured and compared from baseline at specified time points throughout the trial. The specific analysis of T cell naïve/memory/effector phenotype. These results will be assessed individually.

  8. Secondary Immunologic Response: T cell function individually

    Time frame: Assessments will occur at baseline, during (after 4 weeks), after short-term completion of treatment (after 12 weeks), and long-term completion of treatment (6 months).

    Immunologic response will be measured and compared from baseline at specified time points throughout the trial. The specific analysis of T cell exhaustion markers (PD-1, LAG3, TIM3), and homing markers (CD62L, CCR7). These results will be assessed individually.

  9. Secondary Immunologic Response: T cell phenotype within each dosing cohort

    Time frame: Assessments will occur at baseline, during (after 4 weeks), after short-term completion of treatment (after 12 weeks), and long-term completion of treatment (6 months).

    Immunologic response will be measured and compared from baseline at specified time points throughout the trial. The specific analysis of T cell naïve/memory/effector phenotype. These results will be assessed within each dosing cohort.

  10. Secondary Immunologic Response: T cell function within each dosing cohort

    Time frame: Assessments will occur at baseline, during (after 4 weeks), after short-term completion of treatment (after 12 weeks), and long-term completion of treatment (6 months).

    Immunologic response will be measured and compared from baseline at specified time points throughout the trial. The specific analysis of T cell exhaustion markers (PD-1, LAG3, TIM3), and homing markers (CD62L, CCR7). These results will be assessed within each dosing cohort.

  11. Secondary Immunologic Response: T cell phenotype overall study-wide

    Time frame: Assessments will occur at baseline, during (after 4 weeks), after short-term completion of treatment (after 12 weeks), and long-term completion of treatment (6 months).

    Immunologic response will be measured and compared from baseline at specified time points throughout the trial. The specific analysis of T cell naïve/memory/effector phenotype. These results will be assessed overall study-wide.

  12. Secondary Immunologic Response: T cell function overall study-wide

    Time frame: Assessments will occur at baseline, during (after 4 weeks), after short-term completion of treatment (after 12 weeks), and long-term completion of treatment (6 months).

    Immunologic response will be measured and compared from baseline at specified time points throughout the trial. The specific analysis of T cell exhaustion markers (PD-1, LAG3, TIM3), and homing markers (CD62L, CCR7). These results will be assessed overall study-wide.

  13. Secondary Quality of Life Analysis

    Time frame: Assessments performed baseline, after completion of therapy (approximately 12 weeks), and after 6 months.

    Quality of life will be assessed and compared to characterize the impact of eRapa before, during, and after treatment by using the National Institute of Health Patient-Reported Outcomes Measurement Information System (PROMIS-29) and Cognition (long form) assessments.

Sponsors and collaborators

Lead sponsor

Rapamycin Holdings, Inc. dba Emtora Biosciences

Industry

Collaborators

  • Cancer Insight, LLC

Registry information

Official study title

Phase Ib Trial of Encapsulated Rapamycin (eRapa) in Prostate Cancer Patients Under Active Surveillance

Important dates

Study start
2018
Primary completion
2019
Study completion
2019
First posted
Aug 7, 2018
Registry last updated
Mar 31, 2020

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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