Anti-TF Antibody (ALT-836) to Treat Septic Patients With Acute Lung Injury or Acute Respiratory Distress Syndrome

Study Overview
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Brief Summary
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This is a prospective, randomized (1:1), double-blind, multi-center, Phase II clinical study to test the safety and efficacy of a recombinant chimeric anti-tissue factor antibody (ALT-836) versus placebo in patients with sepsis and acute lung injury/acute respiratory distress syndrome (ALI/ARDS). This study was divided into two parts and the first part of the study has been completed. In the first part of the study, sixty patients were randomized at a 1:1 ratio to receive one dose of the study drug or placebo. In the second part of the study, ninety patients will be randomized at a 1:1 ratio to receive a multi-dose treatment regimen of single doses every 72 hours up to a maximum of 4 doses of the study drug or placebo, provided there are no safety concerns.

Detailed Description
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Tissue factor (TF)-dependent procoagulant activity and associated inflammatory processes may play a role in the severity and progression of ALI/ARDS. Recent studies demonstrated that TF levels were elevated in plasma and pulmonary edema fluid of ARDS/ALI patients compared to control patients with hydrostatic pulmonary edema. These higher plasma TF levels were correlated with increased mortality, fewer ventilation-free days, the presence of disseminated intravascular coagulation and the presence of sepsis in patients with ALI/ARDS, suggesting that systemic activation of coagulation may be clinically important in ALI/ARDS. Moreover, the pulmonary TF levels in patients with ALI/ARDS were found to range between 0.5 and 2 nM, approximately 100-fold higher than simultaneous plasma levels, suggesting an intra-alveolar source of TF. Thus, anti-TF antibody blockage of TF activity may therefore provide an effective therapeutic mechanism for the treatment of inflammatory disorders such as ALI and ARDS. This study will test the hypothesis that administration of anti-TF antibody (ALT-836) to septic patients with ALI/ARDS will improve the clinical outcome by shortening the duration of mechanical ventilation for these patients.

Official Title
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Efficacy and Safety Evaluation of ALT-836 in Patients With Sepsis and Acute Lung Injury/Acute Respiratory Distress Syndrome

Conditions
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Sepsis, Acute Lung Injury, Acute Respiratory Distress Syndrome

Intervention / Treatment
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* Drug: ALT-836
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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INCLUSION CRITERIA: Suspected or proven infection Hypoxemia: PaO2/FiO2is ≤300 mm Hg Bilateral infiltrates consistent with pulmonary edema Positive-pressure mechanical ventilation through an endotracheal tube No clinical evidence of left atrial hypertension to explain bilateral infiltrates Presence of at least three of the four SIRS criteria. If only two criteria are evidenced, one must be temperature or WBC Criteria 2 and 3 must occur within a 24-hour interval. The 48-hour enrollment time window begins when criteria 2, 3, and 4 are met. EXCLUSION CRITERIA: <18 years Inability to obtain consent Patient, surrogate, or physician not committed to full support Moribund state in which death was perceived to be imminent Morbid obesity Malignancy or other irreversible disease or condition for which 6-month mortality is estimated to be >50% Known HIV positive with known end stage processes Prior cardiac arrest requiring CPR without fully demonstrated neurological recovery; or New York Heart Association Class IV Pregnant or nursing ALI/ARDS induced by mechanical or chemical injury directly to the lung (including burns, trauma, and near drowning) >48 hours since all inclusion criteria are met Neuromuscular disease that impairs ability to ventilate without assistance Severe chronic respiratory disease, severe pulmonary hypertension, or ventilator dependency Chest wall deformity resulting in severe exercise restriction, secondary polycythemia, or respirator dependent History of organ transplant (including bone marrow) Severe chronic liver disease, as determined by a Child-Pugh Score >10 Hemoglobin persistently < 7.0 g/dL Platelet count <50,000/mm3 Prolonged INR >3 Bleeding disorders unless corrective surgery has been performed Active internal bleeding Major surgery within 24 hours before study drug infusion, or evidence of active bleeding postoperatively, or plan for any major surgery within 3 days after study drug infusion. Diffuse alveolar hemorrhage from vasculitis Known bleeding diathesis Presence of an epidural catheter or lumbar puncture within 48 hours before study drug infusion or anticipation of receiving an epidural catheter or a lumbar puncture within 48 hours after study drug infusion Stroke within 3 months of study entry Trauma with an increased risk of life-threatening bleeding A history of severe head trauma that required hospitalization, or intracranial surgery within two months of study entry Any history of intracerebral arteriovenous malformation, cerebral aneurysm, or central nervous system mass lesion Uses of certain medications or treatment regimens such as chemotherapy, unfractionated heparin, low-molecular-weight heparin, Warfarin, antithrombin III, acetylsalicylic acid, glycoprotein IIb/IIIa antagonists, thrombolytic therapy, and activated Protein C are restricted. Participation in another experimental medication study within 30 days of study entry.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: 1<br>Participants will be randomized to receive ALT-836. | Drug: ALT-836<br>* In the first part of this study, recombinant chimeric anti-tissue factor antibody ALT-836 was administered as a single dose (0.06 mg/Kg) via intravenous infusion over 15 minutes. In the second part of this study, up to four doses (0.06 mg/Kg) of ALT-836 will be administered via intravenous infusion over 15 minutes.<br>* Other names: Formerly TNX-832; Sunol-cH36;|
| Placebo Comparator: 2<br>Patients will be randomized to receive placebo. | Drug: Placebo<br>* In the first part of this study, a single dose of Placebo was administered via intravenous infusion over 15 minutes. In the second part of this study, up to four doses of Placebo will be administered via intravenous infusion over 15 minutes.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Safety profile of the study drug |  | Throughout the 28 days following treatment | 
| Number of ventilator-free days at Day 28 |  | Determined at Day 28 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mortality at Day 7, 14, 21, 28 and 60 |  | Determined at Day 7, 14, 21, 28 and 60 | 
| Length of hospitalization at Day 28 |  | Determined at Day 28 | 
| Length of ICU stay at Day 28 |  | Determined at Day 28 | 
| Number of Non-pulmonary organ failure free days at Day 28 |  | Determined at Day 28 | 
| Changes in physiological variables of lung injury |  | Throughout the 28 days following treatment | 
| Changes in disease severity and lung injury scores |  | Throughout the 28 days following treatment | 
| Effects of the study drug and the etiology of the disease (i.e. pulmonary or extra-pulmonary origin) |  | Determined at Day 28 | 
| Pharmacokinetics & Pharmacodynamics |  | Throughout the 28 days following treatment | 
| Immunogenicity |  | Throughout the 28 days following treatment | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Acute Respiratory Distress Syndrome, ALI/ARDS, Lung Disease, Sepsis, Acute Lung Injury