Working…
ClinicalTrials.gov
ClinicalTrials.gov Menu

Phase III Efficacy and Safety Study of AB103 in the Treatment of Patients With Necrotizing Soft Tissue Infections (ACCUTE)

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. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT02469857
Recruitment Status : Completed
First Posted : June 12, 2015
Results First Posted : October 5, 2021
Last Update Posted : October 5, 2021
Sponsor:
Collaborator:
Biomedical Advanced Research and Development Authority
Information provided by (Responsible Party):
Atox Bio Ltd

Brief Summary:
The purpose of this study is to determine whether AB103 is safe and effective in the treatment of patients with necrotizing soft tissue infections (NSTI) receiving standard of care therapy.

Condition or disease Intervention/treatment Phase
Necrotizing Soft Tissue Infections Necrotizing Fasciitis Fournier's Gangrene Drug: AB103 0.5 mg/kg Other: NaCl 0.9% Phase 3

Detailed Description:

The primary hypothesis of this study is that in addition to standard of care treatment (which includes surgical intervention, antimicrobial therapy and critical care support for organ dysfunction or failure), AB103 will demonstrate a clinically significant treatment benefit over placebo.

This hypothesis will be addressed by measuring the effect of AB103 on a composite of clinical parameters associated with the disease course of patients with NSTI, using a responder analysis. A responding patient must meet all 5 parameters of the composite clinical success end point, while a non-responding patient can fail by not meeting any one of the parameters. These analyses are designed to demonstrate that in addition to being safe, one dose of 0.5 mg/kg of AB103 will:

Improve systemic signs of the infection by improving organ function of patients compared to placebo as measured by:

  • Survival at Day 28
  • Modified SOFA (mSOFA) score on Day 14 and change from baseline to Day 14 ≥ 3. A Day 14 mSOFA score of ≤1 and a change from baseline (pre-treatment) to Day 14 ≥3 will be required for a patient to achieve the primary composite clinical success endpoint (NICCE)

Improve the local signs of the infection, as measured by:

  • Reduced number of debridements, counted to Day 14. No more than 3 debridements to Day 14 will be required for a patient to achieve composite clinical success
  • No amputation after the first debridement (amputation on the first debridement is not considered a failure). A patient will be required to have had no amputations done after the first surgical procedure in order to achieve composite clinical success.

    290 patients will be recruited into the study and randomized to receive either 0.5 mg/kg AB103 or placebo in a 1:1 ratio. Randomization will be stratified within center by the diagnosis of Fournier's Gangrene and mSOFA score category (3-4 vs >4) at screening. The study will be conducted with interim analyses for futility at 100 patients and safety monitored by an independent Data Monitoring Board at regular planned intervals.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 290 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Phase III, Randomized, Double-Blind, Placebo-Controlled, Parallel Group, Study of AB103 as Compared to Placebo in Patients With Necrotizing Soft Tissue Infections. ACCUTE (AB103 Clinical Composite Endpoint Study in Necrotizing Soft Tissue Infections)
Actual Study Start Date : December 1, 2015
Actual Primary Completion Date : August 18, 2019
Actual Study Completion Date : October 18, 2019

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: AB103 0.5 mg/kg
AB103 0.5 mg/kg, IV, single dose
Drug: AB103 0.5 mg/kg
Other Name: reltecimod

Placebo Comparator: NaCl 0.9%
NaCl 0.9%, IV, single dose
Other: NaCl 0.9%
Other Name: Normal saline




Primary Outcome Measures :
  1. Number of Patients Achieving Necrotizing Infections Clinical Composite Endpoint (NICCE) [ Time Frame: 28 days ]

    NICCE was made up of the following 5 components, all of which had to be met to successfully achieve the primary outcome measure (i.e., a "responder"): (i) Alive at Day 28, (ii) ≤ 3 debridements through Day 14, (iii) No amputation performed after the first debridement, (iv) Day 14 modified Sequential Organ Failure Assessment (mSOFA) score ≤ 1, and (v) Reduction of ≥ 3 mSOFA score points between Baseline and Day 14. This analysis compared responders in the reltecimod group versus responders in the placebo group.

    Modified Sequential Organ Failure Assessment (mSOFA) total scores range from 0 to 20, with higher scores reflecting a worse clinical status or outcome. An mSOFA total score of 0 or 1 reflects resolution of organ dysfunction/failure.



Secondary Outcome Measures :
  1. Number of Patients With One or More Adverse Events (AEs) [ Time Frame: 28 days ]
    Number of Patients With One or More Adverse Events (AEs). Serious Adverse Events (SAEs) are included in this outcome measure since SAEs are a subset of AEs.

  2. Number of Patients With One or More Serious Adverse Events (SAEs) [ Time Frame: 28 days ]
    Number of Patients with One or More Serious Adverse Events (SAEs) During the Study

  3. Number of Patients With One or More Secondary Infections [ Time Frame: 28 days ]
    Number of Patients with One or More Secondary Infections During the Study

  4. Number of Patients Achieving Day 14 Modified Sequential Organ Failure Assessment (mSOFA) Score of 0 or 1 [ Time Frame: 14 days ]
    Modified Sequential Organ Failure Assessment (mSOFA) total scores range from 0 to 20, with higher scores reflecting a worse clinical status or outcome. An mSOFA total score of 0 or 1 reflects resolution of organ dysfunction/failure.

  5. Intensive Care Unit (ICU)-Free Days [ Time Frame: 28 days ]
    ICU-free days refers to the number of days a patient did not spend time in the ICU through Day 28.

  6. Ventilator-free Days [ Time Frame: 28 days ]
    Ventilator-free days refers to the number of days a patient was not on a ventilator through Day 28.

  7. Vasopressor-free Days [ Time Frame: 28 days ]
    Vasopressor-free days refers to the number of days a patient did not receive a vasopressor through Day 28.

  8. Hospital Days [ Time Frame: 90 days or until end of follow up ]
    Hospital days refers to the number of days a patient spent time in the hospital.

  9. Number of Patients With a More Favorable or Less Favorable Hospital Discharge Location [ Time Frame: 90 days ]
    Number of patients with more favorable discharge location (home or rehabilitation facility) or less favorable discharge location (skilled nursing facility, another acute care facility, death, other)


Other Outcome Measures:
  1. Number of Deaths From Day 0 Through Day 90 [ Time Frame: 90 days ]
    The number of deaths occurring from Study Day 0 through Study Day 90

  2. Number of Deaths After Day 14 Through Day 90 [ Time Frame: 76 days (after Day 14 through Day 90) ]
    Number of deaths after Study Day 14 through Study Day 90

  3. Number of Deaths From Day 0 Through Day 90 Among Patients With a Screening mSOFA Score of at Least 5 [ Time Frame: 90 days ]
    Number and percentage of patients with a Screening mSOFA score of at least 5 who were alive on Study Day 0 and subsequently died through Study Day 90.

  4. Number of Deaths After Day 14 Through Day 90 Among Patients With a Screening mSOFA Score of at Least 5 [ Time Frame: 76 days (after Day 14 through Day 90) ]
    Number and percentage of patients with a Screening mSOFA score of at least 5 who were alive on Study Day 14 and subsequently died through Study Day 90.

  5. Number of Deaths From Day 0 Through Day 90 Among Patients With Baseline Cardiovascular Failure (Shock) [ Time Frame: 90 days ]
    Number and percentage of patients with baseline cardiovascular failure (shock) who died through Study Day 90.

  6. Number of Deaths After Day 14 Through Day 90 Among Patients With Baseline Cardiovascular Failure (Shock) [ Time Frame: 76 days (after Day 14 through Day 90) ]
    Number and percentage of patients with baseline cardiovascular failure (shock) who were alive on Study Day 14 and subsequently died through Study Day 90.

  7. Number of Patients With a Screening Modified Sequential Organ Failure Assessment (mSOFA) Score of at Least 5 Who Achieved NICCE [ Time Frame: 28 days ]

    NICCE was made up of the following 5 components, all of which had to be met to successfully achieve the primary outcome measure: (i) Alive at Day 28, (ii) ≤ 3 debridements through Day 14, (iii) No amputation performed after the first debridement, (iv) Day 14 modified Sequential Organ Failure Assessment (mSOFA) score ≤ 1, and (v) Reduction of ≥ 3 mSOFA score points between Baseline and Day 14.

    Modified Sequential Organ Failure Assessment (mSOFA) total scores range from 0 to 20, with higher scores reflecting a worse clinical status or outcome. An mSOFA total score of 0 or 1 reflects resolution of organ dysfunction/failure.


  8. Number of Patients With a Screening mSOFA Score of at Least 5 Who Achieved Day 14 Modified Sequential Organ Failure Assessment (mSOFA) Score of 0 or 1 [ Time Frame: 14 days ]
    Modified Sequential Organ Failure Assessment (mSOFA) total scores range from 0 to 20, with higher scores reflecting a worse clinical status or outcome. An mSOFA total score of 0 or 1 reflects resolution of organ dysfunction/failure.

  9. Number of Patients With Baseline Cardiovascular Failure (Shock) Who Achieved NICCE [ Time Frame: 28 days ]
    NICCE was made up of the following 5 components, all of which had to be met to successfully achieve the primary outcome measure: (i) Alive at Day 28, (ii) ≤ 3 debridements through Day 14, (iii) No amputation performed after the first debridement, (iv) Day 14 modified Sequential Organ Failure Assessment (mSOFA) score ≤ 1, and (v) Reduction of ≥ 3 mSOFA score points between Baseline and Day 14.

  10. Number of Patients With Baseline Cardiovascular Failure (Shock) Who Achieved Day 14 Modified Sequential Organ Failure Assessment (mSOFA) Score of 0 or 1 [ Time Frame: 14 days ]
    Modified Sequential Organ Failure Assessment (mSOFA) total scores range from 0 to 20, with higher scores reflecting a worse clinical status or outcome. An mSOFA total score of 0 or 1 reflects resolution of organ dysfunction/failure.



Information from the National Library of Medicine

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.


Layout table for eligibility information
Ages Eligible for Study:   12 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  1. Surgical confirmation of NSTI by attending surgeon;
  2. mSOFA score ≥3 (in any one or combination of the 5 major components of SOFA score with one organ component having a score of at least 2: cardiovascular, respiratory, renal, coagulation, CNS), measured as close as possible to the first debridement;
  3. IV drug administration within 6 hours from the clinical diagnosis and the decision at the study site, to have an urgent surgical exploration and debridement (drug should not be administered until surgical confirmation is established);
  4. If a woman is of childbearing potential, she must consistently use an acceptable method of contraception from baseline through Day 28;
  5. If a male patient's sexual partner is of childbearing potential, the male patient must acknowledge that they will consistently use an acceptable method of contraception (defined above) from baseline through Day 28.
  6. Signed and dated informed consent (ICF) as defined by the Institutional Review Board (IRB) and, if applicable, California Bill of Rights. If patient is unable to comprehend or sign the ICF, patient's legally acceptable representative may sign the ICF

Exclusion Criteria:

  1. BMI>51;
  2. Patient who has been operated at least once for the current NSTI infection and had a curative deep tissue debridement;
  3. Patients with overt peripheral vascular disease in the involved area ;
  4. Diabetic patients with peripheral vascular disease who present with below the ankle infection;
  5. Removed deep vein thrombosis (DVT) in area of NSTI as an exclusion criteria
  6. Patient with burn wounds;
  7. Current condition of: (a) Inability to maintain a mean arterial pressure > 50 mmHg and/or systolic blood pressure > 70 mmHg for at least 1 hour prior to screening despite the presence of vasopressors and IV fluids or (b) a patient with respiratory failure such that an SaO2 of 80% cannot be achieved or (c) a patient with refractory coagulopathy (INR >5) or thrombocytopenia (platelet count <20,000) that does not partially correct with administration of appropriate factors or blood products;
  8. Chronic neurological impairment that leads to a neuro mSOFA component ≥2;
  9. Recent cerebrovascular accident in the last 3 months;
  10. Patients with cardiac arrest requiring cardiopulmonary resuscitation within the past 30 days;
  11. Patient is not expected to survive throughout 28 days of study due to underlying medical condition, such as poorly controlled neoplasm;
  12. Patient or patient's family are not committed to aggressive management of the patient's condition;
  13. Any concurrent medical condition, which in the opinion of the Investigator, may compromise the safety of the patient or the objectives of the study or the patient will not benefit from treatment such as:

    • Congestive heart failure (CHF){ New York Heart Association (NYHA) class III-IV}
    • Severe chronic pulmonary obstructive disease (COPD)
    • Liver dysfunction {Childs-Pugh class C}
    • Immunosuppression (see Appendix F, Section 15.6 for list of excluded immunosuppressive medications)
    • Neutropenia < 1,000 cells/mm3not due to the underlying infection
    • Idiopathic Thrombocytopenia Purpura
    • Receiving or about to receive chemotherapy or biologic anti-cancer treatment although hormonal manipulation therapies for breast and prostate malignancies are permitted
    • Hematological and lymphatic malignancies in the last 5 years;
  14. Known HIV infection with CD4 (cluster of differentiation 4) count < 200 cells/mm3 or < 14% of all lymphocytes;
  15. Patients with known chronic kidney disease (documented pre-illness creatinine value(s) ≥2.0) or patients receiving renal replacement therapy for chronic kidney disease;
  16. Patients that are treated with continuous hemofiltration (e.g. Continuous Veno-Venous Hemofiltration) for acute kidney dysfunction, not due to NSTI, starting prior to study drug administration;
  17. Pregnant or lactating women;
  18. Previous enrollment in a clinical trial involving investigational drug or a medical device within 30 days;
  19. Previous enrollment in this protocol, ATB-202 or the Phase 2 trial of AB103, ATB-201.

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): NCT02469857


Locations
Show Show 71 study locations
Sponsors and Collaborators
Atox Bio Ltd
Biomedical Advanced Research and Development Authority
Investigators
Layout table for investigator information
Study Director: Wayne M Dankner, MD Atox Bio Ltd
Principal Investigator: Eileen M Bulger, MD Harborview Injury Prevention and Research Center
  Study Documents (Full-Text)

Documents provided by Atox Bio Ltd:
Study Protocol  [PDF] August 23, 2018
Statistical Analysis Plan  [PDF] September 24, 2019

Publications of Results:
Layout table for additonal information
Responsible Party: Atox Bio Ltd
ClinicalTrials.gov Identifier: NCT02469857    
Other Study ID Numbers: ATB-202
First Posted: June 12, 2015    Key Record Dates
Results First Posted: October 5, 2021
Last Update Posted: October 5, 2021
Last Verified: October 2021
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Keywords provided by Atox Bio Ltd:
AB103
Necrotizing fasciitis
Additional relevant MeSH terms:
Layout table for MeSH terms
Infections
Communicable Diseases
Soft Tissue Infections
Fournier Gangrene
Fasciitis
Fasciitis, Necrotizing
Gangrene
Disease Attributes
Pathologic Processes
Musculoskeletal Diseases
Necrosis
Bacterial Infections
Bacterial Infections and Mycoses