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
About this trial
This is an interventional treatment trial for Peripheral Artery Disease
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
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
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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