ClinicalTrials.gg
WithdrawnNCT04572776Updated Nov 9, 2021

Phase 3 Study to Assess Resiniferatoxin vs Standard of Care for the Treatment of Intractable Cancer Pain

A Phase 3 interventional study of Resiniferatoxin and Standard of Care in Pain, Intractable and Pain Cancer, sponsored by Sorrento Therapeutics, Inc.. Withdrawn. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-11-09.

Sponsored by Sorrento Therapeutics, Inc. · Phase 3, Interventional, and Treatment

Why this study was withdrawn
To be replaced by a different protocol
Phase
Phase 3
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This is a Phase 3 study to assess the safety and efficacy of a single epidural administration of Resiniferatoxin versus standard of care for the treatment of intractable pain associated with cancer.

Read the detailed description

This study is a multicenter, randomized Phase 3 study to assess the safety and efficacy of a single epidural administration of Resiniferatoxin versus standard of care (SOC) for the treatment of intractable pain associated with cancer. Subjects will be followed for 12 weeks after treatment.

02

Conditions studied

  • Pain, Intractable
  • Pain Cancer

Keywords

  • pain
  • cancer pain
  • intractable pain
  • RTX
  • resiniferatoxin
03

In context

Pain, Intractable

90 studies on the registry are indexed under Pain, Intractable; 16 are open to participants now.

Browse Pain, Intractable studies →

Lead sponsor

Sorrento Therapeutics, Inc. is the lead sponsor of 46 studies on the registry; 4 are open to participants now.

Of its 10 completed or terminated interventional studies of FDA-regulated products, 1 (10%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • confirmed clinical diagnosis of advanced cancer or .
  • Pain in the target area (lower thoracic or chest level down to lower extremities) most likely attributed to cancer as per Investigator.
  • Pain severity at the target area is moderate-to-severe, defined as worst pain ≥6 on the NPRS during screening (average of the 3 days prior to Day 1), despite available pain therapy or analgesia. Subjects with multiple sites of pain are eligible as long as the intensity of pain at the intended target location for treatment fulfills the score of ≥6 and can be differentiated from other areas.
  • Must report NPRS scores in the daily diary for at least 3 days prior to Day 1.
  • Must be at least 18 years of age or older at Screening.
  • Subject has reasonable expectation that they will be able to complete the study (through at least the week 4 visit).
  • of at least 6 months at screening
  • Minimum score of 50 at screening
  • Sexually active female participants of must be willing to use an effective method of method to avoid pregnancy
  • Must have provided written which includes signing the institutional review board approved consent form prior to participating in any study related activity.
  • Must be willing and capable of understanding and cooperating with the requirements of the study, including the ability to perform/undergo all required assessments for the duration of the study.
  • Must be able to understand, and complete study related forms and adequately communicate with the investigator and/or site staff.

Exclusion criteria

Exclusion Criteria:

  • Undergoing or have plans to undergo changes to current cancer treatment from 7 days prior to Day 1 to 4 weeks after Day 1. Continuation of existing anti-cancer therapy without any planned change in dose or regimen is permitted. Participants may receive new cancer therapy 4 weeks after Day 1 including agents in another clinical trial while participating in this study. If participating in another trial, it is requested that the subject agree to continue clinic visits and completion of patient diaries in this trial.
  • Participants with in the lumbar area.
  • Level of intended epidural injection is in the site of prior lumbar spine surgical procedures, such as posterior spinal fusions, that could impair the ability to perform the injection, as assessed by the Investigator.
  • Evidence of increased intracranial pressure as determined by symptoms, history, physical examination, and/or magnetic resonance imaging (MRI).
  • Patients with an intra-thecal pump implanted within 2 weeks of the baseline visit will be excluded. Pump placement during the study will not be permitted for 4 weeks after the study drug is administered; and existing pump medications cannot be changed during that same initial 4 week period.
  • Has evidence of a non-correctable coagulopathy or hemostasis problem at Screening (V1) or Baseline (V2) as defined by:
  • /International Normalized Ratio ≥1.3 times (ULN) range with blood drawn within 1 week of the planned injection.
  • Partial thromboplastin time ≥1.5times upper limit of normal (ULN) with blood drawn within 1 week of the planned injection.
  • count \<75,000 cells/mm3 with blood drawn within 1 week of the planned injection. Participants must stop any anticoagulant (e.g., warfarin) or antiplatelet (e.g., aspirin) before and during IP administration according to acceptable medical guidelines. Participants with abnormal PT or PTT at Screening, but whose PT or PTT is expected to normalize once anticoagulation is held, are eligible as long as the PT or PTT has normalized prior to the planned injection.
  • Participants with a total \<750 cells/mm3 at Screening (V1) or Baseline (V2).
  • Is febrile or has other evidence of an infection within 24 hours of the planned injection.
  • Has an allergy or to capsaicin, or radiographic contrast agents used in diagnostic imaging studies.
  • Female participants who are pregnant at Screening (V1) or Day 1 (V2), are planning on becoming pregnant, or are currently breastfeeding.
  • Participants with any medical condition that, in the Investigator's opinion, could adversely impact study participation or safety, the conduct of the study, or interfere with the pain assessments.
  • Participants with additional loci of pain above the midthoracic level or other pain disorder due to noncancer etiology at Screening (V1), unless both the investigator and the subject are clearly able to distinguish this pain from the target pain due to cancer.
  • Non-study related minor surgical procedure ≤2 days or major surgical procedure ≤7 days prior to the Screening Visit. In all cases, the subject must be sufficiently recovered and stable prior to IP administration on D1.
  • Participants who have not recovered from any toxicities from previous chemotherapy, hormone therapy, immunotherapy, or radiotherapies that are Grade 3 or higher by . Participants are eligible if the toxicities are Grade 2 or less, as long as all other inclusion/exclusion criteria are fulfilled.
  • Arterial thrombi (including stroke), myocardial infarction, admission for unstable angina, within 3 months prior to Screening (V1).
  • Evidence or history of bleeding disorder, i.e., any hemorrhage or bleeding event of CTCAE >Grade 2 within 4 weeks prior to D1.
Terms in these criteria, in plain language(15)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Karnofsky performance status (KPS)

A 0–100 scale of how well someone can carry out everyday activities. 100 is no complaints and no signs of illness; 70 is able to look after yourself but not to work or keep up normal activity; 50 is needing considerable help and frequent medical care.

Studies often ask for 60 or 70 and above. Your doctor gives the score.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Leptomeningeal disease

Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.

Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

CTCAE grade

The US National Cancer Institute’s scale of how severe an adverse event is — any unwanted medical event during a study, such as a symptom, an illness or an abnormal test result, whether or not a treatment caused it. Whether it did is judged separately.

1
Mild.
2
Moderate.
3
Severe.
4
Life-threatening.
5
Death due to the event.

“Side effects of earlier treatment resolved to grade 1 or less” means they have settled to mild or gone.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
0 participants (actual)

Study arms

  • Experimental
    Resiniferatoxin

    Single dose of Resiniferatoxin (25 mcg in 3 mL) injected epidurally

    Drug: Resiniferatoxin

  • Active comparator
    Standard of Care

    Standard of care treatment as determined by the investigator

    Other: Standard of Care

Interventions

  • Resiniferatoxin is a TRPV-1 agonist which works by specifically ablating nociceptive nerve fibers.

    Also known as: RTX

  • OtherStandard of Care

    Standard of care for intractable pain with the exception of intra-thecal pump placement as determined by the investigator.

    Also known as: SOC

06

What researchers measure

Primary outcomes

  1. Change in worst pain as assessed using the Numeric Pain Rating Scale (NPRS)

    Change from baseline to Week 4 in the intensity of worst pain over the previous 24 hours in the area targeted for treatment as measured by the 11-point NPRS (0-10 where 0 is no pain and 10 is worst pain imaginable)

    Time frame: Baseline to Week 4

Secondary outcomes

  1. Change in worst pain as assessed using the NPRS

    Change from baseline to Weeks 8 and 12 in the intensity of worst pain over the previous 24 hours in the area targeted for treatment as measured by the 11-point NPRS (0-10 where 0 is no pain and 10 is worst pain imaginable)

    Time frame: Baseline to Weeks 8 and 12

  2. Change in area under the curve (AUC) of worst pain as assessed using the NPRS

    AUC calculated on change from baseline through Week 4 in worst pain in the target pain location over the previous 24 hours, using the NPRS (0-10)

    Time frame: Baseline through Week 4

  3. Incidence and severity of adverse events (AEs)

    Incidence and severity of AEs assessed using the Common Terminology Criteria for Adverse Events (CTCAE) criteria

    Time frame: Baseline through Week 12

  4. Change in Quality of Life (QOL) as assessed using the modified Brief Pain Inventory-Short Form (BPI-SF)

    Change in Quality of Life from baseline to week 4 based on total score from the BPI-SF, modified to record the target pain treated with study drug

    Time frame: Baseline to Week 4

  5. Duration of response in subjects who experienced ≥20% decrease from baseline in worst pain as assessed using the NPRS

    Duration of response defined as time from ≥20% decrease from baseline in worst pain score in the target pain location to ≥20% increase from the nadir of the worst pain score

    Time frame: Randomization through Week 12

  6. Change in intensity of average pain as assessed using the NPRS

    Change from baseline to Week 4 in the intensity of average pain over the previous 24 hours in the target pain location as measured by the NPRS (0-10)

    Time frame: Baseline to Week 4

07

Study locations

No study locations are listed for this record.

08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Dec 2020; primary completion for Mar 2023, 27 months later.

How these figures are worked out, and which studies are left out of them.

Registered
Sep 29, 2020
First posted
Oct 1, 2020
StartEst.
Dec 2020
Primary completionEst.
Mar 2023
CompletionEst.
Mar 2023
Last update
Nov 9, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Nov 9, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT04572776
Responsible party
Sponsor
First posted
Oct 1, 2020
Start date
Dec 2020 (estimated)
Primary completion
Mar 2023 (estimated)
Completion
Mar 2023 (estimated)
Last update
Nov 9, 2021

Study contacts

Monica Luchi, MD
study director · Sorrento Therapeutics

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in Nov 2021. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: Resiniferatoxin

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