A Phase 2a Study to Evaluate the Dose-response, Safety, Tolerability, Efficacy, and Population Pharmacokinetics of Intravenous NTS-521 Infusions in the Early Recovery Treatment From Acute Ischemic Stroke (ACT-IVATE)

July 31, 2026 updated by: NeuroTrauma Sciences, LLC

A Phase 2a Multicenter, Randomized, Double-blind, Placebo-controlled, Parallel-arm Domain Within the ACT-GLOBAL Trial Platform, to Evaluate the Dose-response, Safety, Tolerability, Efficacy, and Population Pharmacokinetics of Intravenous NTS-521 Infusions in the Early Recovery Treatment From Acute Ischemic Stroke

This is a trial to evaluate the safety and effect of three intravenous (IV) doses of NTS-521 for the early recovery treatment of acute ischemic stroke (AIS). Participants will be followed for 90 days.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Stroke represents a major global public health crisis, characterized by a paradox: declining age-standardized rates yet a rapidly expanding absolute global burden. According to recent epidemiological analyses from the Global Burden of Disease (GBD) study there were 11.9 million incident strokes worldwide in 2021, corresponding to a global age-standardized incidence rate of 141.5 per 100,000 person-years. Stroke claimed 7.3 million lives (an age-standardized mortality rate of 87.4 per 100,000), making it the third leading cause of mortality worldwide, accounting for 10.7% of all deaths.

The trial's target population for NTS-521 intervention consists of participants undergoing endovascular thrombectomy (EVT), and/or intravenous thrombolysis (IVT), or medical care without reperfusion treatment.

Study Type

Interventional

Enrollment (Estimated)

140

Phase

  • Phase 2

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

Study Contact Backup

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Acute ischemic stroke with moderate to severe hemiparesis
  • Functional independence in activities of daily living without requiring nursing care before the index stroke.
  • Consent process by participant or proxy, with reconsent provision.
  • Age ≥ 45 to ≤ 80 years of age (inclusive) on the date of randomization
  • Sufficient attention, comprehension, and cooperation to carry out instructions

Exclusion Criteria:

  • Pre-existing motor deficit prior to index stroke
  • Posterior circulation ischemic stroke
  • Lacunar stroke
  • Qualifying brain imaging demonstrating intracranial hemorrhage, malignant middle cerebral artery (MCA) infarct with edema, or bilateral/multifocal infarcts, clinically significant vascular malformation, brain tumor, or other central nervous system (CNS) pathology
  • Recent major surgery or trauma (<30 days)

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

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Placebo 0.9% saline solution
0.9% saline solution
Other: Placebo Control
0.9% saline solution delivered intravenously
Experimental: Low Dose NTS-521
Low Dose NTS-521 in 0.9% saline delivered IV
Drug: NTS-521
Intravenous NTS-521
Experimental: Medium Dose NTS-521
Medium Dose NTS-521 in 0.9% saline delivered IV
Drug: NTS-521
Intravenous NTS-521
Experimental: High Dose NTS-521
High Dose NTS-521 in 0.9% saline delivered IV
Drug: NTS-521
Intravenous NTS-521

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Safety Assessment
Time Frame: Safety assessments between baseline and Day 30 and Day 90
Count of incident adverse events by treatment arm, including Treatment Emergent Adverse Events (TEAEs), Serious Adverse Events (SAEs), and Suspected Unexpected Serious Adverse Reaction (SUSARs) as assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI - CTCAE v6.0), Vital signs and electrocardiograph (ECG) assessed by descriptive statistics, shift tables, and normal range criteria, and standard biochemical and hematology laboratory panel, assessed by descriptive statistics, shift tables, and normal range criteria
Safety assessments between baseline and Day 30 and Day 90

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Fugl-Meyer- Upper Extremity Motor Score (FMA-UE)
Time Frame: Change from Baseline Total Fugl-Meyer-Upper Extremity Motor Score, assessed as a continuous variable to Day 90
Change from baseline to Day 90 in the FMA-UE motor score (0-66; higher is better)
Change from Baseline Total Fugl-Meyer-Upper Extremity Motor Score, assessed as a continuous variable to Day 90
National Institutes of Health Stroke Scale Assessment (NIHSS)
Time Frame: Assessed as a continuous variable from baseline to Day 90
National Institutes of Health Stroke Scale (0-42; higher is worse)
Assessed as a continuous variable from baseline to Day 90
Modified Rankin Score (mRS)
Time Frame: Assessed as an ordinal variable from Baseline to Day 90
Modified Rankin Score (mRS) (0-6; higher is worse), assessed as an ordinal variable
Assessed as an ordinal variable from Baseline to Day 90
EuroQual-5D-5L Assessment (EQ-5D-5L)
Time Frame: Assessed as a continual variable from Baseline to Day 90
Change from baseline to Day 90 for EQ-5D-5L Quality of Life Assessment Score (5 to 25, lower indicating better quality of life)
Assessed as a continual variable from Baseline to Day 90

Collaborators and Investigators

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

Sponsor

NeuroTrauma Sciences, LLC

Investigators

  • Principal Investigator: Bijoy A Menon, MD, The University of Calgary Stroke Program & Stroke Clinical Trial Group

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 (Estimated)

October 31, 2026

Primary Completion (Estimated)

December 15, 2028

Study Completion (Estimated)

December 15, 2028

Study Registration Dates

First Submitted

July 27, 2026

First Submitted That Met QC Criteria

July 31, 2026

First Posted (Actual)

August 3, 2026

Study Record Updates

Last Update Posted (Actual)

August 3, 2026

Last Update Submitted That Met QC Criteria

July 31, 2026

Last Verified

July 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • NTS-521-A015-201

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

product manufactured in and exported from the U.S.

Yes

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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