Experimental stroke drug RNS60 passes early safety check in small trial
NCT ID NCT04693715
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This Phase 2 trial tested the safety of an experimental drug called RNS60 in 83 people having a severe stroke caused by a large blood clot. Participants received either RNS60 or a placebo as a 48-hour infusion, starting within 30 minutes of consent. The main goal was to check for serious side effects and survival at 90 days.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- RNS60 injection solution
- What this could lead to
- If safe and effective, RNS60 could improve recovery after severe stroke by protecting brain cells during treatment.
- What could go wrong
- This is an early Phase 2 safety trial with only 83 participants, so results may not confirm benefit. The drug is still experimental and not yet proven to work.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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83 people
The number who actually took part.
- Started
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Jul 2021
- Finished
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Nov 2023
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Acute ischemic stroke (AIS) selected for emergency endovascular treatment. 2. Age 18 years or older. 3. Onset (last-known-well) time to randomization time within 24 hours. 4. Disabling stroke defined as a baseline National Institutes of Health Stroke Score (NIHSS) 1. NIHSS \> 5 for internal carotid artery (ICA) and M1-middle cerebral artery (MCA) occlusion or 2. NIHSS \> 10 for M2-MCA occlusion. 5. Confirmed symptomatic intracranial occlusion at one or more of the following locations: Intracranial carotid I/T/L, M1 or M2 segment MCA. Tandem extracranial carotid and intracranial occlusions are permitted. 6. Pre-stroke (24 hours prior to stroke onset) historical modified Rankin Scale (mRS) ≤2. Patient must be living independently without requiring nursing care. 7. Qualifying imaging performed less than 2 hours prior to randomization. 8. Consent process completed as per applicable laws and regulation and the IRB requirements. Exclusion Criteria: 1. Evidence of a large core of established infarction defined as Alberta Stroke Program Early Computerized Tomography Score (ASPECTS) 0-4. 2. Evidence of absence of collateral circulation on qualifying imaging (collateral score of 0 or 1 if multiphase computed tomography angiography (mCTA) is used, or absence of adequate ischemic penumbra in the judgment of the Investigator if computed tomographic perfusion (CTP) is used). 3. Any evidence of intracranial hemorrhage or mass lesion on the qualifying imaging. 4. Planned use of an endovascular device not having approval or clearance by the relevant regulatory authority. 5. Endovascular thrombectomy procedure is completed as defined by the presence of arterial access closure. 6. Clinical history, past imaging or clinical judgment suggesting that the intracranial occlusion is chronic or there is suspected intracranial dissection such that there is a predicted lack of success with endovascular intervention. 7. Estimated or known weight \> 130 kg (287 lbs). 8. Known pregnant/lactating female. 9. Myocardial infarction (MI) within 6 months prior to Screening including non-Q wave MI; Diagnosis of congestive heart failure (CHF) with either: 1. current clinical signs and symptoms of ventricular dysfunction (e.g., edema, shortness of breath), 2. CHF medication adjustment within the prior 30 days or 3. ejection fraction (if report available) of 30% or less measured in the 6 months prior to Screening; as either medically documented or reported by patient or another person considered by the Investigator to be reasonably reliable. 10. Known renal impairment defined as requiring renal replacement therapy (hemo- or peritoneal dialysis). 11. Inability to have magnetic resonance imaging (MRI) (Non-magnetic resonance \[MR\] compatible implants or any other foreseeable reason, including claustrophobia) 12. Severe or fatal comorbid illness that will prevent improvement or follow up. 13. Inability to complete follow-up treatment to Day 90. 14. Participation in another clinical trial investigating a drug, medical device, or a medical procedure in the 30 days preceding trial inclusion and throughout the duration of the trial. 15. Reported known seizure at time of stroke onset. 16. Ischemic stroke within previous 30 days. 17. Patients in normal sinus rhythm with a known QTcF \> 460 ms at Screening. 18. Any other symptom that in the investigator's opinion may complicate or preclude the subject from participating in this trial.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Chattanooga Center for Neurologic Research
Chattanooga, Tennessee, 37404, United States
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Houston Methodist Hospital
Houston, Texas, 77030, United States
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Northwestern University
Chicago, Illinois, 60611, United States
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Oregon Health & Science University
Portland, Oregon, 97239, United States
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Rhode Island Hospital
Providence, Rhode Island, 02903, United States
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The Hospital of the University of Pennsylvania
Philadelphia, Pennsylvania, 19104, United States
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Thomas Jefferson University
Philadelphia, Pennsylvania, 19107, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- After a stroke, does the heart inflame? MRI study probes the link
- Natural capsule tested as Add-On for stroke recovery
- Can a stent retriever plus suction clear stroke clots faster?
- Can a drug infused into brain arteries protect stroke patients during clot removal?
- Can a Clot-Busting drug help stroke patients treated later?