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Temsirolimus Adventitial Delivery to Improve ANGioplasty and/or Atherectomy Revascularization Outcomes Below the Knee (TANGO-3)

Primary Purpose

Peripheral Artery Disease, Critical Limb Ischemia

Status
Not yet recruiting
Phase
Phase 3
Locations
Study Type
Interventional
Intervention
Temsirolimus
Saline placebo
Sponsored by
Mercator MedSystems, Inc.
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Peripheral Artery Disease

Eligibility Criteria

18 Years - 90 Years (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria

  • Age ≥18 years and <90 years
  • Patient has documented severe claudication (Rutherford 3) or chronic Critical Limb Ischemia (CLI) (Rutherford 4-5) in the target limb due to arterial stenosis between the knee joint space and the ankle joint prior to the study procedure
  • Life expectancy >1 year in the Investigator's opinion
  • Patient has been informed of the nature of the study, agrees to participate, agrees to the follow-up schedule, and has signed an IRB approved consent form
  • Female patients of childbearing potential have a negative pregnancy test ≤7 days before the procedure and are willing to use a highly effective method of birth control for one month preceding and 12 months following study treatment

Exclusion Criteria

  • Patient is already enrolled in another clinical study of systemic drug therapy or another device study that has not completed its primary endpoint, including prior enrollment in this study
  • Patient is unwilling or unlikely to comply with visit schedule
  • Patient is incapable of providing consent and/or incapable of understanding the nature, significance and implications of the clinical trial
  • Patient is already receiving or planned to receive systemic immunotherapy or chemotherapy
  • Patient is at high risk of thrombosis and taking systemic anticoagulant therapy that is unable to be withheld during the procedure
  • Patient has a CNS tumor or elevated risk for intracerebral bleeding and is receiving chronic anticoagulation therapy e.g. warfarin or oral anticoagulant (note: chronic antiplatelet therapy, e.g. aspirin and clopidogrel, and procedural anticoagulation therapy, e.g. heparin or bivalirudin, are allowed)
  • Recent (<30 days prior to study procedure) myocardial infarction
  • Cerebrovascular accident <60 days prior to the study procedure or any history of intracerebral hemorrhage
  • Any surgical or endovascular procedure performed within 14 days prior to the index procedure or planned within 30 days post index procedure is exclusionary; allowable exceptions to this exclusion include the following:

    1. concurrent procedures during the index procedure
    2. prior staged revascularization in the target limb, e.g. for inflow revascularization within 14 days of and prior to the index procedure
  • Planned major (above the ankle) target limb amputation
  • Active foot infection, including osteomyelitis of the metatarsal or more proximal region; allowable exceptions to this exclusion include the following:

    1. osteomyelitis in the toes
    2. mild cellulitis around the perimeter of gangrene
    3. small ulcers (<25mm largest diameter)
  • Inability to receive temsirolimus or iodinated contrast medium due to labeled contra-indications or known sensitivity reactions
  • Stage 3 (per SVS WIfI classification) or worse heel ulcers or heel ulcers that are determined to be primarily neuropathic in nature or non-ischemic in origin
  • Risk of amputation based on WIfI clinical staging = HIGH
  • Patient has active viral infection of SARS-CoV-2 or active disease diagnosis of COVID-19 (must be determined within 7 days of index procedure)
  • Patient has a bilirubin level of >1.5xULN
  • Estimated glomerular filtration rate (eGFR, calculated from serum creatinine using an isotope dilution mass spectrometry (IDMS)-traceable equation) less than 30 mL/min, except for patients with end stage renal disease on chronic hemodialysis

Sites / Locations

    Arms of the Study

    Arm 1

    Arm 2

    Arm Type

    Active Comparator

    Placebo Comparator

    Arm Label

    Temsirolimus

    Placebo

    Arm Description

    Temsirolimus delivered to adventitia and perivascular tissue after primary revascularization

    Saline placebo delivered to adventitia and perivascular tissue after primary revascularization

    Outcomes

    Primary Outcome Measures

    Freedom from Cinical Relevant Target Lesion Failure
    Superiority of treatment vs. control group in the composite freedom from the following: Clinically Relevant Target Lesion Occlusion Clinically Driven Target Lesion Revascularization Ischemia-Driven Major Amputation of the Target Limb
    MALE + POD
    Noninferiority of treatment vs. control groups in the composite freedom from Major Adverse Limb Event (MALE) in the target limb or Perioperative Death (POD)

    Secondary Outcome Measures

    Freedom from Target Lesion Failure
    Superiority of treatment vs. control group in the composite freedom from the following: Target Lesion Occlusion Clinically Driven Target Lesion Revascularization Ischemia-Driven Major Amputation of the target limb
    To determine non-inferiority in long-term mortality rate
    Death at the following time points
    To determine non-inferiority in freedom from all-cause death or major adverse limb event.
    Composite of all-cause death or MALE of the target limb
    To determine non-inferiority in amputation-free survival.
    Freedom from death and ischemia-driven major amputation of the target limb
    Safety and tolerability will be assessed from overall rate of adverse events (subclassified as major, serious, non-serious, unanticipated, revascularization procedure-related, device-related and drug-related).
    AEs/ARs will be categorized into one of the following: MALE of the target limb Non-MALE target limb SAE/SAR Other SAE/SAR Non-serious AE/AR AEs/ARs will further be classified as: Expected UADE SUSAR AEs/ARs will also be classified for relatedness (definitely, probably, possibly or not) to the following: Revascularization procedure Use of the Bullfrog device The study drug
    Change of the individual components of the primary and secondary endpoints (ischemia-driven major amputation, clinically driven target lesion revascularization, clinically relevant target lesion occlusion or all target lesion occlusion)
    Taken individually: Ischemia-driven major amputation of the target limb CD-TLR Clinically relevant target lesion occlusion Any target lesion occlusion
    Freedom from major adverse limb events
    MALE of the target limb
    Composite of the following wound healing measures
    Total size of foot wounds on the target limb, percent and absolute change from baseline Status of foot wounds on the target limb Unassisted wound healing
    Reduction in unplanned minor amputations
    Unplanned minor amputation rate, overall and by level (forefoot, midfoot, hindfoot)
    Rutherford score improvement
    Rutherford category and change from baseline
    WIfI score improvement
    WIfI category and change from baseline
    Composite of hemodynamic improvement measures (ABI, TBI and toe pressure)
    Ankle-brachial index and change from baseline Toe-brachial index and change from baseline Toe pressure and change from baseline
    Patient reported quality of life benefits (VascuQoL)
    VascuQoL results and change from baseline
    Patient reported outcomes (walking impairment questionnaire) benefits
    WIQ results and change from baseline
    Primary and primary assisted patency rates
    Primary patency rate Primary assisted patency rate
    Primary and secondary sustained clinical improvement rates
    Primary sustained clinical improvement rate Secondary sustained clinical improvement rate

    Full Information

    First Posted
    June 9, 2020
    Last Updated
    June 12, 2020
    Sponsor
    Mercator MedSystems, Inc.
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    1. Study Identification

    Unique Protocol Identification Number
    NCT04433572
    Brief Title
    Temsirolimus Adventitial Delivery to Improve ANGioplasty and/or Atherectomy Revascularization Outcomes Below the Knee
    Acronym
    TANGO-3
    Official Title
    Temsirolimus Adventitial Delivery to Improve ANGioplasty and/or Atherectomy Revascularization Outcomes Below the Knee: A Multicenter, Randomized, Double-Blind, Placebo-Controlled Trial to Evaluate the Effect of Temsirolimus Perivascular Injection 0.1 mg/mL on the Incidence of Ischemia-Driven Major Amputation, Clinically Driven Target Lesion Revascularization, and Clinically Relevant Target Lesion Occlusion After Revascularization of Lesions Below the Knee in Patients With Symptomatic Rutherford 3-5 Peripheral Artery Disease
    Study Type
    Interventional

    2. Study Status

    Record Verification Date
    June 2020
    Overall Recruitment Status
    Not yet recruiting
    Study Start Date
    December 1, 2020 (Anticipated)
    Primary Completion Date
    December 1, 2025 (Anticipated)
    Study Completion Date
    December 1, 2025 (Anticipated)

    3. Sponsor/Collaborators

    Responsible Party, by Official Title
    Sponsor
    Name of the Sponsor
    Mercator MedSystems, Inc.

    4. Oversight

    Studies a U.S. FDA-regulated Drug Product
    Yes
    Studies a U.S. FDA-regulated Device Product
    No
    Data Monitoring Committee
    Yes

    5. Study Description

    Brief Summary
    A multicenter, randomized, double-blind, placebo-controlled trial to evaluate the effect of Temsirolimus Perivascular Injection 0.1 mg/mL on the incidence of ischemia-driven major amputation, clinically driven target lesion revascularization, and clinically relevant target lesion occlusion after revascularization of lesions below the knee in patients with symptomatic Rutherford 3-5 peripheral artery disease. The primary safety endpoint will be gathered at 1-month post-index procedure. The primary efficacy endpoint will be gathered at 6 months post-index procedure. Participants will be followed for up to 5 years post-index procedure.
    Detailed Description
    After completion of revascularization therapy and any decision to place stents, participants will be qualified for final enrollment in the study and will be randomized 1:1 and treated with the investigational drug or placebo. Any stents will be placed only after randomization, assignment, and adventitial drug therapy, although any stenting decisions (other than for treatment of AEs) must be made prior to randomization and adventitial drug delivery in order to avoid bias toward or against stenting.

    6. Conditions and Keywords

    Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
    Peripheral Artery Disease, Critical Limb Ischemia

    7. Study Design

    Primary Purpose
    Treatment
    Study Phase
    Phase 3
    Interventional Study Model
    Parallel Assignment
    Model Description
    Block randomization will be stratified for Rutherford 3 and for Rutherford 4/5 participants such that each strata will be randomized 1:1. Block randomization will also be stratified by site such that each site will be assigned a 1:1 randomization.
    Masking
    ParticipantCare ProviderInvestigatorOutcomes Assessor
    Masking Description
    The active vials and placebo vials will be identical in size, color and appearance on reconstitution. Investigators and participants will be blinded to assignment. Any stents will be placed only after randomization, assignment, and adventitial drug therapy, although any stenting decisions (other than for treatment of AEs) must be made prior to randomization and adventitial drug delivery in order to avoid bias toward or against stenting. Participants will not be told of their treatment assignment until after they complete the trial.
    Allocation
    Randomized
    Enrollment
    400 (Anticipated)

    8. Arms, Groups, and Interventions

    Arm Title
    Temsirolimus
    Arm Type
    Active Comparator
    Arm Description
    Temsirolimus delivered to adventitia and perivascular tissue after primary revascularization
    Arm Title
    Placebo
    Arm Type
    Placebo Comparator
    Arm Description
    Saline placebo delivered to adventitia and perivascular tissue after primary revascularization
    Intervention Type
    Drug
    Intervention Name(s)
    Temsirolimus
    Intervention Description
    0.1 mg/mL temsirolimus, including contrast medium with approximately 75 mg iodine per mL. The dosage will be delivered in a volume of 0.50 mL per cm of target lesion length, up to 30 cm, with +50% allowance for anatomical considerations; for a total volume of up to 22.5 mL and a total dose of up to 2.25 mg in participants assigned to treatment. The same volumes of comparator agent will be delivered in control participants.
    Intervention Type
    Drug
    Intervention Name(s)
    Saline placebo
    Intervention Description
    Saline placebo, including contrast medium with approximately 75 mg iodine per mL. The dosage will be delivered in a volume of 0.50 mL per cm of target lesion length, up to 30 cm, with +50% allowance for anatomical considerations; for a total volume of up to 22.5 mL and a total dose of up to 2.25 mg in participants assigned to treatment. The same volumes of comparator agent will be delivered in control participants.
    Primary Outcome Measure Information:
    Title
    Freedom from Cinical Relevant Target Lesion Failure
    Description
    Superiority of treatment vs. control group in the composite freedom from the following: Clinically Relevant Target Lesion Occlusion Clinically Driven Target Lesion Revascularization Ischemia-Driven Major Amputation of the Target Limb
    Time Frame
    6 Months
    Title
    MALE + POD
    Description
    Noninferiority of treatment vs. control groups in the composite freedom from Major Adverse Limb Event (MALE) in the target limb or Perioperative Death (POD)
    Time Frame
    30 Days
    Secondary Outcome Measure Information:
    Title
    Freedom from Target Lesion Failure
    Description
    Superiority of treatment vs. control group in the composite freedom from the following: Target Lesion Occlusion Clinically Driven Target Lesion Revascularization Ischemia-Driven Major Amputation of the target limb
    Time Frame
    6 Months
    Title
    To determine non-inferiority in long-term mortality rate
    Description
    Death at the following time points
    Time Frame
    12, 24, 36, 48, 60 months
    Title
    To determine non-inferiority in freedom from all-cause death or major adverse limb event.
    Description
    Composite of all-cause death or MALE of the target limb
    Time Frame
    30 days, 6, 12 months
    Title
    To determine non-inferiority in amputation-free survival.
    Description
    Freedom from death and ischemia-driven major amputation of the target limb
    Time Frame
    30 days, 6, 12, 24 months
    Title
    Safety and tolerability will be assessed from overall rate of adverse events (subclassified as major, serious, non-serious, unanticipated, revascularization procedure-related, device-related and drug-related).
    Description
    AEs/ARs will be categorized into one of the following: MALE of the target limb Non-MALE target limb SAE/SAR Other SAE/SAR Non-serious AE/AR AEs/ARs will further be classified as: Expected UADE SUSAR AEs/ARs will also be classified for relatedness (definitely, probably, possibly or not) to the following: Revascularization procedure Use of the Bullfrog device The study drug
    Time Frame
    30 days, 6, 12, 24 months
    Title
    Change of the individual components of the primary and secondary endpoints (ischemia-driven major amputation, clinically driven target lesion revascularization, clinically relevant target lesion occlusion or all target lesion occlusion)
    Description
    Taken individually: Ischemia-driven major amputation of the target limb CD-TLR Clinically relevant target lesion occlusion Any target lesion occlusion
    Time Frame
    6, 12, 24 months
    Title
    Freedom from major adverse limb events
    Description
    MALE of the target limb
    Time Frame
    30 days, 6, 12, 24 months
    Title
    Composite of the following wound healing measures
    Description
    Total size of foot wounds on the target limb, percent and absolute change from baseline Status of foot wounds on the target limb Unassisted wound healing
    Time Frame
    30 days, 6, 12 months
    Title
    Reduction in unplanned minor amputations
    Description
    Unplanned minor amputation rate, overall and by level (forefoot, midfoot, hindfoot)
    Time Frame
    30 days, 6, 12 months
    Title
    Rutherford score improvement
    Description
    Rutherford category and change from baseline
    Time Frame
    30 days, 6, 12, 24 months
    Title
    WIfI score improvement
    Description
    WIfI category and change from baseline
    Time Frame
    30 days, 6, 12, 24 months
    Title
    Composite of hemodynamic improvement measures (ABI, TBI and toe pressure)
    Description
    Ankle-brachial index and change from baseline Toe-brachial index and change from baseline Toe pressure and change from baseline
    Time Frame
    30 days, 6, 12, 24 months
    Title
    Patient reported quality of life benefits (VascuQoL)
    Description
    VascuQoL results and change from baseline
    Time Frame
    30 days, 6, 12, 24 months
    Title
    Patient reported outcomes (walking impairment questionnaire) benefits
    Description
    WIQ results and change from baseline
    Time Frame
    30 days, 6, 12, 24 months
    Title
    Primary and primary assisted patency rates
    Description
    Primary patency rate Primary assisted patency rate
    Time Frame
    30 days, 6, 12, 24 months
    Title
    Primary and secondary sustained clinical improvement rates
    Description
    Primary sustained clinical improvement rate Secondary sustained clinical improvement rate
    Time Frame
    30 days, 6, 12, 24 months

    10. Eligibility

    Sex
    All
    Minimum Age & Unit of Time
    18 Years
    Maximum Age & Unit of Time
    90 Years
    Accepts Healthy Volunteers
    No
    Eligibility Criteria
    Inclusion Criteria Age ≥18 years and <90 years Patient has documented severe claudication (Rutherford 3) or chronic Critical Limb Ischemia (CLI) (Rutherford 4-5) in the target limb due to arterial stenosis between the knee joint space and the ankle joint prior to the study procedure Life expectancy >1 year in the Investigator's opinion Patient has been informed of the nature of the study, agrees to participate, agrees to the follow-up schedule, and has signed an IRB approved consent form Female patients of childbearing potential have a negative pregnancy test ≤7 days before the procedure and are willing to use a highly effective method of birth control for one month preceding and 12 months following study treatment Exclusion Criteria Patient is already enrolled in another clinical study of systemic drug therapy or another device study that has not completed its primary endpoint, including prior enrollment in this study Patient is unwilling or unlikely to comply with visit schedule Patient is incapable of providing consent and/or incapable of understanding the nature, significance and implications of the clinical trial Patient is already receiving or planned to receive systemic immunotherapy or chemotherapy Patient is at high risk of thrombosis and taking systemic anticoagulant therapy that is unable to be withheld during the procedure Patient has a CNS tumor or elevated risk for intracerebral bleeding and is receiving chronic anticoagulation therapy e.g. warfarin or oral anticoagulant (note: chronic antiplatelet therapy, e.g. aspirin and clopidogrel, and procedural anticoagulation therapy, e.g. heparin or bivalirudin, are allowed) Recent (<30 days prior to study procedure) myocardial infarction Cerebrovascular accident <60 days prior to the study procedure or any history of intracerebral hemorrhage Any surgical or endovascular procedure performed within 14 days prior to the index procedure or planned within 30 days post index procedure is exclusionary; allowable exceptions to this exclusion include the following: concurrent procedures during the index procedure prior staged revascularization in the target limb, e.g. for inflow revascularization within 14 days of and prior to the index procedure Planned major (above the ankle) target limb amputation Active foot infection, including osteomyelitis of the metatarsal or more proximal region; allowable exceptions to this exclusion include the following: osteomyelitis in the toes mild cellulitis around the perimeter of gangrene small ulcers (<25mm largest diameter) Inability to receive temsirolimus or iodinated contrast medium due to labeled contra-indications or known sensitivity reactions Stage 3 (per SVS WIfI classification) or worse heel ulcers or heel ulcers that are determined to be primarily neuropathic in nature or non-ischemic in origin Risk of amputation based on WIfI clinical staging = HIGH Patient has active viral infection of SARS-CoV-2 or active disease diagnosis of COVID-19 (must be determined within 7 days of index procedure) Patient has a bilirubin level of >1.5xULN Estimated glomerular filtration rate (eGFR, calculated from serum creatinine using an isotope dilution mass spectrometry (IDMS)-traceable equation) less than 30 mL/min, except for patients with end stage renal disease on chronic hemodialysis
    Central Contact Person:
    First Name & Middle Initial & Last Name or Official Title & Degree
    Kirk Seward, PhD
    Phone
    (510) 614-4555
    Email
    kseward@mercatormed.com

    12. IPD Sharing Statement

    Plan to Share IPD
    No
    IPD Sharing Plan Description
    No, there is not a plan to make individual participant data available to other researchers.

    Learn more about this trial

    Temsirolimus Adventitial Delivery to Improve ANGioplasty and/or Atherectomy Revascularization Outcomes Below the Knee

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