Biomarkers of Acute Stroke in Clinic (BASIC)

September 26, 2023 updated by: Ischemia Care LLC

The proposed study will investigate the clinical use of the ISCDX test that may differentiate between diverse stroke etiologies as listed below:

Aim 1: Differentiate between cardioembolic and large artery atherosclerotic ischemic strokes, when hemorrhagic stroke is ruled out, as defined by TOAST classification of subtypes of acute ischemic stroke.

Aim 2: In cases of ischemic strokes of unknown or "cryptogenic" etiology, determine the ability of biomarker blood tests to predict etiology between cardioembolic and large artery atherosclerotic.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Acute ischemic stroke (AIS) is a leading cause of adult mortality and morbidity in the United States, affecting over 800,000 individuals, annually, leaving many with permanent disability. Emergent evaluation, prompt acute treatment, and identification of stroke etiology for secondary prevention are key to decreasing the morbidity and mortality associated with cerebrovascular disease. Key to treatment and prevention is the identification of stroke etiology - large vessel atherosclerosis, cardioembolic phenomenon, or in-situ small vessel cerebrovascular disease - since primary and secondary prevention measures differ based on stroke subtype. The diagnosis of ischemic stroke includes a combination of patient history, clinical assessment, and brain imaging. However, identifying the cause of cerebrovascular ischemia is challenging and routinely assigned of cryptogenic origin.

Therefore, the need is great, to understand the pathogenesis of AIS events in order to develop more effective preventative measures. Recent studies have identified the differential expression of genes in whole blood which may differentiate the major ischemic stroke types. Such differences may help identify AIS events that are more likely to respond to therapy specifically tailored to the major stroke type. Furthermore, by establishing a more robust standard for secondary prevention, future stroke events may be avoided.

BASIC is a multisite prospective study with a estimated enrollment of up to 500 consecutive adult subjects including no more than 50 age, gender and co-morbidity matched controls ("Controls"). Stroke subjects will be recruited from patients who present to the Emergency Department (ED) or hospital with suspected AIS. Research personnel will identify potential patients by responding to "Brain Attack" pages from the ED to the Stroke Team for patients who meet current Brain Attack criteria. Following evaluation by the ED and neurology physicians, the clinical coordinator will verify the patient had a suspected AIS and meets eligibility criteria. The patient or their legal surrogate will be approached for study participation. Written informed consent will be obtained for all subjects enrolled.

Control subjects will be those who present to the Emergency Department for non-stroke reasons but have one or more risk factors for stroke. These subjects will not have a recruitment window. They can be consented as they present to the hospital. Tubes will be marked as controls. In past studies, these have been collected during slow times in the Emergency Department. Once the study has reached 50 controls, the sponsor will stop enrolling for this group. This has been done in the past by sending the sites a communication that the control group quota has been reached.

The recruitment window will be determined by time of symptom onset, time of presentation at ED or hospital, and ability to consent. This will include patients that present within 30 hours of symptom onset or last known normal time and clinical evidence suggesting Acute Ischemic Stroke.

Study Type

Observational

Enrollment (Estimated)

500

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

  • Name: Judy Morgan, MBA, CCRC
  • Phone Number: 513-827-9106
  • Email: judy@iscdx.com

Study Contact Backup

Study Locations

  • United States
    • Ohio
      • Columbus, Ohio, United States, 43214
        • Recruiting
        • Ohio Health Riveside Methodist Hospital
        • Contact:
          • Jennifer Czerniak, RN
          • Phone Number: 614-566-1254
        • Principal Investigator:
          • William J Hicks, MD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years to 78 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Source of Subject Population:

Ischemic stroke population will be adult patients who present to the Emergency Department or hospital with an acute ischemic strokeor meet the definition of a control subject who meet the inclusion/exclusion criteria.

Controls subjects will be non-neurologic patients who are matched with the stroke patients for age, race, gender and smoking plus one or more of the following co-morbidities or vascular risk factors:

  1. Diabetes
  2. Hypertension
  3. Atrial fibrillation
  4. Hyperlipidemia

Description

Inclusion Criteria:

  • Patients >18 and < 80 years of age.
  • Signs and symptoms suggestive of AIS due to cardioembolic, large vessel, or unknown etiology according to TOAST criteria.
  • Arrival to the ED within 30 hours of symptom onset or last known normal time and clinical evidence suggesting Acute Ischemic Stroke.
  • Head CT or MRI ruling out other pathology such as vascular malformation, hemorrhage, tumor or abscess which would likely be responsible for presenting neurologic symptoms
  • Informed consent obtained

Exclusion Criteria:

  • Any central nervous system infection, i.e. meningitis or encephalitis in the past 30 days
  • Any form of head trauma, stroke or intracranial hemorrhage in the past 30 days
  • Any history of primary or metastatic brain cancer
  • Active cancer defined as a diagnosis of cancer, within 6 months before enrollment, any treatment for cancer within the previous 6 months, or recurrent or metastatic cancer.
  • Autoimmune diseases: such as lupus, rheumatoid arthritis, Crohn's disease, ulcerative colitis
  • Active chronic infectious diseases (eg. HIV/AIDS, hepatitis C)
  • Any underlying medical condition which in the opinion of the investigator would prohibit the patient from providing informed consent
  • Major surgery within three months prior to the index event
  • Signs and symptoms suggestive of (i) AIS due to small vessel occlusion (lacune) and other known etiology according to TOAST criteria, as well as (ii) stroke mimics, transient ischemic attacks, or transient neurological events.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Ischemic Stroke

Ischemic stroke subjects presenting within 30 hours from symptom onset will have al PAX Gene Blood RNA tubes drawn upon arrival to the Emergency Department (if available) or hospital.

Biomarker blood draw
Diagnostic test: ISCDX blood test

The ISCDX test is based on gene expression changes that occur as a result of the ischemic stroke. When the stroke occurs, the immune system in the body reacts and causes changes in gene expression in several types of cells, including white blood cells, related to activation of innate and adaptive immune systems.

The ISCDX test distinguishes between cardioembolic and large artery atherosclerotic origin of stroke using a gene signature. The pattern or signature of up or down regulation for all genes for a patient determines whether the patient's pattern of gene expression is more like the pattern seen in other cardioembolic patients or more like the pattern seen in patients with large artery atherosclerotic cause of stroke.
Control

Control group subjects will have PAX Gene Blood RNA tubes drawn. Control group matched with ischemic stroke subjects for age, race, gender, smoking history with at least one of the following vascular risk factors: diabetes, hypertension, atrial fibrillation, hyperlipidemia.

Biomarker blood draw

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Comparison of the rates of patients presenting with acute ischemic stroke identified with ISCDX testing with TOAST criteria
Time Frame: up to 1 year
The ISCDX test results will be compared to acute ischemic stroke assessment as defined by the TOAST criteria
up to 1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Ischemia Care LLC

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 1, 2019

Primary Completion (Estimated)

December 31, 2024

Study Completion (Estimated)

December 31, 2024

Study Registration Dates

First Submitted

March 25, 2019

First Submitted That Met QC Criteria

March 29, 2019

First Posted (Actual)

April 1, 2019

Study Record Updates

Last Update Posted (Actual)

September 28, 2023

Last Update Submitted That Met QC Criteria

September 26, 2023

Last Verified

September 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • NCT02014896-2

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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