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Phase IIb Study of MP4OX in Traumatic Hemorrhagic Shock Patients

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. Identifier: NCT01262196
Recruitment Status : Completed
First Posted : December 17, 2010
Last Update Posted : August 22, 2013
Information provided by (Responsible Party):

Brief Summary:
MP4OX is a novel oxygen therapeutic agent being developed as an ischemic rescue therapy to enhance perfusion and oxygenation of tissues at risk during hemorrhagic shock. MP4OX is a pegylated hemoglobin-based colloid. Due to its molecular size and unique oxygen dissociation characteristics, MP4OX targets delivery of oxygen to ischemic tissues. This study will evaluate the safety and efficacy of MP4OX treatment in trauma patients suffering from lactic acidosis due to severe hemorrhagic shock. The study hypothesis is that MP4OX will reverse the lactic acidosis by enhancing perfusion and oxygenation of ischemic tissues and thereby prevent and reduce the duration of organ failure and improve outcome in these patients.

Condition or disease Intervention/treatment Phase
Shock, Hemorrhagic Shock, Traumatic Acidosis, Lactic Drug: MP4OX Drug: Saline Phase 2

Detailed Description:

Acute traumatic injury, including both blunt and penetrating injury, is often associated with severe uncontrolled bleeding which can lead to hemorrhagic shock. During shock, inadequate blood flow results in local ischemia and tissue hypoxia (insufficient oxygenation) of critical organs, which can be detected by an increase in serum lactate levels in these trauma victims. Despite optimal care, more than 10% of trauma victims who reach hospital alive will die, and many will suffer from organ failure. Death and significant, persistent morbidity are consequences of trauma, and traumatic injuries are associated with lost productivity, reduced quality of life, and direct costs to patients and health care systems worldwide.

The primary treatment of trauma is to support ventilation and oxygenation, limit blood loss, and maintain cardiovascular function so that organs are perfused. The patient's airway may be intubated to allow oxygenated airflow to the lungs. Mechanical ventilation is used if the patient cannot maintain oxygenation and carbon dioxide elimination. Damage-control surgery is used to limit blood loss and to intentionally delay definitive repair until the patient can better tolerate procedures. Blood transfusions are provided to maintain the oxygen-carrying capacity of the circulation. Platelets and coagulation factors are infused to correct any coagulopathy from dilution of blood and consumption of clotting factors. Vasopressor and inotropic agents may be used to support low cardiac output or blood pressure. Renal replacement therapy may be instituted if kidney failure occurs.

Despite optimal care, organ dysfunction is present in many patients. Hypoperfusion and anaerobic metabolism of organs and tissues can be detected by the presence of lactic acidosis. Current therapy is aimed at supporting failing organs, but an agent that accelerates the repayment of an oxygen debt and prevents or shortens the duration of organ failure is sought. Blood transfusion improves circulation of oxygen-carrying red blood cells but is insufficient if lactic acidosis is present, even when the hemoglobin level has been restored. Studies in critically ill intensive care patients have demonstrated that elevated initial and 24-hour lactate levels are significantly correlated with mortality, and prolonged elevation of blood lactate levels after trauma has been correlated with increased organ failure and mortality.

Support for the efficacy of MP4OX in resuscitation of severe hemorrhage shock comes from several preclinical studies in hamster, rat, and swine. Using a swine model of uncontrolled hemorrhage and resuscitation, survival was greater and restoration of hemodynamics and acid-base status were improved with MP4OX relative to equivalent volume of crystalloid, pentastarch, or unmodified hemoglobin. Administration of MP4OX improved 24-hour survival, stabilized cardiac output and arterial pressure at nearly normal levels, and reduced lactate more effectively than control fluids. Importantly, these benefits of MP4OX were observed with or without co-administration of autologous blood, suggesting that blood alone is not sufficient to achieve resuscitation, and that the effects of MP4OX are additional to those of blood.

Additional support comes from a recently completed phase IIa trauma study in 51 patients with lactic acidosis due to severe hemorrhage. MP4OX treatment was associated with a more rapid and sustained reduction of high lactate levels, and a greater proportion of MP4OX-treated patients who normalized lactate by four hours after dosing. There was also a trend toward shorter median hospital stay and a greater proportion of MP4OX-treated patients being discharged from hospital alive by Day 28. These phase IIa results suggest improved oxygen delivery and utilization by ischemic tissues in the MP4OX-treated patients, based on the reversal of lactic acidosis, and support the positive results from the preclinical models of hemorrhagic shock resuscitation.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 348 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Multi-center, Randomized, Double-blind, Controlled Study to Evaluate the Safety and Efficacy of MP4OX Treatment, in Addition to Standard Treatment, in Severely Injured Trauma Patients With Lactic Acidosis Due to Hemorrhagic Shock
Study Start Date : May 2011
Actual Primary Completion Date : October 2012
Actual Study Completion Date : November 2012

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Shock

Arm Intervention/treatment
Experimental: MP4OX
250-mL dose
Drug: MP4OX
4.3 g/dL pegylated hemoglobin in balanced lactate-electrolyte solution
Other Names:
  • Hemoglobin pegylated
  • MalPEG-Hb
  • MP4
  • PEG-Hb
  • Pegylated-Hb

Placebo Comparator: Control
250-mL of normal saline solution
Drug: Saline
Normal saline (0.9%) solution
Other Names:
  • Normal saline
  • Saline solution
  • Sodium chloride 0.9%

Primary Outcome Measures :
  1. Proportion of patients discharged from hospital through day 28 and alive at the Day 28 follow-up visit [ Time Frame: 28 days ]

Secondary Outcome Measures :
  1. Hospital-free, ICU-free, and ventilator-free days [ Time Frame: Through 28 days ]
  2. Composite endpoint of Time to Complete Organ Failure Resolution (CTCOFR) [ Time Frame: At 14 and 21 days ]
  3. Proportion of patients who normalize (≤ 2.2 mmol/L) lactate levels [ Time Frame: 2, 4, 6, 8 and 12 hours ]
  4. Proportion of patients remaining: (1) in hospital, (2) in ICU, and (3) on ventilator through Day 28 [ Time Frame: 28 days ]
  5. Number of days: (1) in hospital, (2) in ICU, and (3) on the ventilator [ Time Frame: Through 28 days ]
  6. All-cause mortality [ Time Frame: At 48 hours and at 28 days ]
  7. Time (days) from randomization to: (1) death, (2) discharge from hospital, (3) discharge from ICU, and (4) liberation from mechanical ventilation [ Time Frame: Through 28 days ]
  8. Sequential organ failure assessment (SOFA score) [ Time Frame: Daily ]
  9. Modified Denver score [ Time Frame: Daily ]

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Adult male or female (surgically sterile or post-menopausal or confirmed not to be pregnant)
  • Trauma injury (blunt and/or penetrating) resulting in lactic acidosis due to hemorrhagic shock
  • Acidosis (blood lactate level ≥ 5 mmol/L; equivalent to 45 mg/dL) arterial or venous

Exclusion Criteria:

  • Massive injury incompatible with life
  • Normalization of lactate prior to dosing (≤ 2.2 mmol/L)
  • Patients with evidence of severe traumatic brain injury as defined by ANY one of the following: Known non-survivable head injury or open brain injury; Glasgow Coma Score (GCS) = 3, 4 or 5; Known AIS (head region) ≥ 4 shown by an appropriate imaging methodology; Contemplated CNS surgery; or Abnormal physical exam indicative of severe CNS or any spinal cord injury above T5 level
  • Cardiac arrest prior to randomization
  • Age below the legal age for consenting
  • Estimated time from injury to randomization> 4 hours
  • Estimated time from hospital admission to randomization > 2 hours
  • Known pregnancy
  • Use of any oxygen carrier other than RBCs
  • Known previous participation in this study
  • Professional or ancillary personnel involved with this study
  • Known receipt of any investigational drug(s) within 30 days prior to study

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 identifier (NCT number): NCT01262196

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Sponsors and Collaborators
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Principal Investigator: Karim Brohi, MD The Royal London Hospital

Additional Information:

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Responsible Party: Sangart Identifier: NCT01262196     History of Changes
Other Study ID Numbers: TRA-205
First Posted: December 17, 2010    Key Record Dates
Last Update Posted: August 22, 2013
Last Verified: August 2013
Keywords provided by Sangart:
Hemorrhagic shock
Lactic acidosis
Oxygen carriers
Oxygen therapeutics
Hemoglobin solutions
Red cell substitutes
Additional relevant MeSH terms:
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Acidosis, Lactic
Shock, Hemorrhagic
Shock, Traumatic
Pathologic Processes
Acid-Base Imbalance
Metabolic Diseases
Wounds and Injuries
Pharmaceutical Solutions