Clinical trial NCT00499902: Phase 2 Proof-of-Concept Study of the Safety and Efficacy of Alfimeprase to Rapidly Open Arteries and Restore Brain Function Following a Stroke
Official title: Phase 2, Multicenter, Open-Label, Two-Stage Study to Evaluate the Safety and Efficacy of Intra-Arterial Catheter-Directed Alfimeprase for Restoration of Neurologic Function and Rapid Opening of Arteries in Stroke (CARNEROS-1)
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: PHASE2
Conditions: Acute Ischemic Stroke
Keywords: AIS
acute ischemic stroke
stroke
alfimeprase
blood clot
brain
thrombus
thrombolytic
thrombosis
plasminogen activator
arterial flow
neurology
intra-arterial
intra-thrombus
catheter-directed
symptomatic ICH
ICH
AOL
arterial occlusive lesion
recanalization
Lead sponsor: ARCA Biopharma, Inc.
Sponsor class: INDUSTRY
First posted: 2007-07-12
Enrollment: 7
Sex: ALL
Minimum age (years): 18
Maximum age (years): 85
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to identify a safe and effective bolus dose of intra-arterial/intra-thrombus alfimeprase in acute ischemic stroke (AIS) 3 to 9 hours from symptom onset.

Detailed description: Currently approved drug therapy for AIS is limited by the need to treat within 3 hours of symptom onset. Alfimeprase acts to degrade fibrin directly and is inactivated locally by circulating alpha-2 macroglobulin. This study will determine whether treatment with alfimeprase facilitates rapid restoration of arterial blood flow with avoidance of symptomatic hemorrhagic conversion in subjects with AIS within 3 to 9 hours of symptom onset.

Eligibility criteria: Inclusion Criteria:

* Clinical diagnosis of AIS defined as the sudden onset of an acute focal neurological deficit presumed to be due to cerebral ischemia
* Arterial occlusion of the carotid T or a M1, M2, or M1-M2 branch of the middle cerebral artery (MCA) as documented by CT angiography or magnetic resonance angiography
* Arteriographically confirmed occlusion of the carotid T or a M1, M2, or M1-M2 branch of the MCA
* The subject (or legally acceptable representative) must give written informed consent
* Age 18 years to 85 years
* Onset of symptoms of AIS (i.e., last known well time) within 3-9 hours
* Baseline NIHSS of 4 to 25
* Available for follow-up assessments at 30 and 90 days

Exclusion Criteria:

* Contraindication to systemic anticoagulation including any history of prior intracranial hemorrhage
* Uncontrolled hypertension at study entry as defined by systolic blood pressure greater than 180 mmHg or diastolic blood pressure greater than or equal to 100 mmHg on repeated measures prior to study entry despite the use of IV antihypertensive agents
* Expectation based on timing of presentation that alfimeprase administration will not be able to be completed by 9 hours after stroke onset
* Inability to initiate alfimeprase within 120 minutes of the qualifying imaging scan
* Coma
* Rapidly improving neurological symptoms at the time of screening
* Brain CT or MRI evidence of intracranial bleeding of any age
* High clinical suspicion for subarachnoid hemorrhage despite a negative baseline CT or MRI
* CT evidence of an acute and/or evolving hypodensity greater than 1/3 of the MCA territory in the vascular territory to be treated or Alberta Stroke Program Early CT Score (ASPECTS) of less than or equal to 5
* MRI diffusion weighted imaging lesion greater than 1/3 of the MCA territory in the vascular distribution to be treated
* Carotid artery and/or intracranial artery stenosis that precludes safe passage of a microcatheter to treat the primary AOL
* Life expectancy of less than 6 months
* History of significant acute or chronic kidney disease, including known nephrotic syndrome, that would preclude safe contrast angiography
* Known allergy to contrast agents
* History of immune deficiency
* History of heparin-induced thrombocytopenia
* Participation in any study of an investigational device, medication, biologic, or other agent within 30 days prior to enrollment (Stage I)/randomization (Stage II)
* Any stroke, myocardial infarction, or use of thrombolytic therapy (including investigational thrombolytic therapy) within 3 months prior to enrollment (Stage I)/randomization (Stage II)
* Past participation in any alfimeprase clinical trial
* Pregnant, lactating, or actively menstruating women and women of child-bearing potential who are not using adequate contraceptive precautions
* Current use of oral anticoagulants or an international normalized ratio (INR) greater than 1.4
* Any non-atherosclerotic arteriopathy
* Any prior neurologic event that would obscure the radiographic or clinical evaluation of the new index neurological deficits
* Subjects with known renal insufficiency defined as a serum creatinine \>2 mg/dL (\>180 mmoL/L)
* Subjects with known clinically significant hepatic disease defined as transaminase values \> 3x upper limit of normal
* Subjects with any malignant neoplasm diagnosed within five years prior to screening, with the exception of basal cell carcinoma of the skin and fully resected squamous cell carcinoma of the skin
* Subjects with a platelet count less than 100,000/mm3
* Subjects with a baseline serum glucose level less than 50 mg/dL or greater than 300 mg/dL
* Subjects receiving any dose of a heparinoid or a non-prophylactic intensity dose of a low molecular weight heparin within the 24-hour period prior to study drug administration
* Any other subject feature that in the opinion of the investigator should preclude study participation

Primary outcomes:
measure: Symptomatic intracerebral hemorrhage (ICH) defined as a greater than or equal to 4-point increase in NIHSS compared to baseline at the time of CT evidence of ICH within 24 hours of study drug administration.
measure: Recanalization of primary arterial occlusive lesion (AOL) using the Thrombolysis in Myocardial Infarction (TIMI) classification; a score of II or III will be considered success.
Secondary outcomes:
measure: Relative hypotension requiring treatment (i.e. volume expanders and/or vasopressors)
measure: New cardiac events (e.g., cardiac ischemia, congestive heart failure, and dysrhythmia)
measure: Relative hypotension not requiring treatment
measure: Major bleeding events (TIMI definition)
measure: Hemorrhagic transformation: hemorrhagic infarction (Type 1 and 2), parenchymal hematoma formation (Type 1 and 2)
measure: Intracerebral hemorrhage outside of the stroke territory
measure: New AIS
measure: AEs/SAEs/All cause mortality
measure: Changes in chemistry, hematology, coagulation, and alpha-2-macroglobulin parameters based on central laboratory measurements
measure: Anti-alfimeprase antibody detection based on central laboratory measurements
measure: Recanalization of the primary AOL
measure: Global reperfusion of the primary AOL distal vascular bed defined by the Thrombolysis in Cerebral Infarction (TICI) score
measure: Neurological benefit as assessed by individual and combined analysis of NIHSS, mRS, and BI
Other outcomes:
Locations:
city: Los Angeles
country: United States
facility: UCLA Medical Center
state: California
city: Chicago
country: United States
facility: Northwestern Medical Center
state: Illinois
city: Des Moines
country: United States
facility: Ruan Neurology & Clinical Research Center
state: Iowa
city: Iowa City
country: United States
facility: University of Iowa Hospital
state: Iowa
city: Iowa City
country: United States
facility: University of Iowa Hospital
state: Iowa
city: Wichita
country: United States
facility: University of Kansas School of Medicine, Via Christi Regional Medical Center
state: Kansas
city: Louisville
country: United States
facility: Norton Hospital
state: Kentucky
city: Lansing
country: United States
facility: Michigan State University, Sparrow Hospital
state: Michigan
city: Albany
country: United States
facility: Albany Medical Center Hospital
state: New York
city: Buffalo
country: United States
facility: Kalieda Health, MFH
state: New York
city: New York
country: United States
facility: Columbia Presbyterian Medical Center
state: New York
city: Cincinnati
country: United States
facility: University of Cincinnati
state: Ohio
city: Columbus
country: United States
facility: Riverside Methodist Hospital
state: Ohio
city: Portland
country: United States
facility: Oregon Stroke Center
state: Oregon
city: Pittsburg
country: United States
facility: University of Pittsburg Medical Center
state: Pennsylvania
city: Houston
country: United States
facility: Baylor College of Medicine
state: Texas
city: Milwaukee
country: United States
facility: St. Luke's Medical Center
state: Wisconsin
city: Calgary
country: Canada
facility: University of Calgary, Foothills Medical Centre
state: Alberta
city: Vancouver
country: Canada
facility: Vancouver General Hospital
state: British Columbia
city: Mississauga
country: Canada
facility: Trilium Health Center
state: Ontario
city: Toronto
country: Canada
facility: University Health Network Toronto
state: Ontario
city: Montreal
country: Canada
facility: Montreal Neurological Institute
state: Quebec
Study officials:
affiliation: ARCA Biopharma, Inc.
name: Susan M Begelman, MD
role: STUDY_DIRECTOR
References: