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WithdrawnNCT05484154RHAPSODY-2Updated Oct 1, 2024

Efficacy and Safety Evaluation of 3K3A-APC in Ischemic Stroke

A Phase 3 interventional study of 3K3A-APC and Placebo in Ischemic Stroke, sponsored by ZZ Biotech, LLC. Withdrawn. Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2024-10-01.

Sponsored by ZZ Biotech, LLC · Phase 3, Interventional, and Treatment

Why this study was withdrawn
NIH funding suspension.
Phase
Phase 3
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years to 90 Years
Sex
All
01

Study summary

The purpose of this study is to evaluate the efficacy and safety of intravenous doses of 3K3A-APC, a recombinant variant of human activated protein C (APC), in the treatment of acute ischemic stroke following treatment with thrombolysis, mechanical thrombectomy or both.

Read the detailed description

This multicenter, randomized, placebo-controlled, double-blind, Phase 3 study is being performed in coordination with StrokeNet to evaluate efficacy and safety of 3K3A-APC following administration of thrombolysis, mechanical thrombectomy, or both in subjects with moderate to severe acute ischemic stroke.

The study will be conducted in two phases. During a lead-in dose-finding phase, a maximum of 360 subjects will be randomized to 3K3A-APC or placebo using a Bayesian adaptive approach. Randomized subjects will receive 3K3A-APC or placebo every 12 hours for up to 5 doses (approximately 3 days) or until discharge from the hospital (whichever occurs first). The lead-in phase will transition to one selected 3K3A APC dose-and recruitment will continue-when a single dose proves superior to all other doses and safe.

The definitive phase will continue with the selected dose of 3K3A-APC from the lead-in phase. Randomization will be stratified on 4 variables. Lead-in patients who received the dose selected for the definitive phase will be included in the final data analysis.

02

Conditions studied

  • Ischemic Stroke

Keywords

  • Ischemic Stroke
  • Stroke
  • APC
  • 3K3A
  • 3K3A-APC
  • Activated protein C
  • RHAPSODY
03

In context

Ischemic Stroke

2,653 studies on the registry are indexed under Ischemic Stroke; 936 are open to participants now.

Browse Ischemic Stroke studies →

Lead sponsor

ZZ Biotech, LLC is the lead sponsor of 3 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 90 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Acute ischemic stroke
  • Able to receive thrombolysis, mechanical thrombectomy or both
  • National Institutes of Health Stroke Scale (NIHSS) score of ≥ 5
  • Signed informed consent
  • Agreement to use effective birth control throughout the study

Exclusion criteria

Exclusion Criteria:

  • Neurologic deficit is non-disabling
  • History of stroke or penetrating head injury within 90 days prior to enrollment
  • History of previous or current diagnosis of intracranial hemorrhage
  • Moyamoya disease, cerebral arteriovenous malformation, or known unsecured aneurysm requiring intervention during the acute study period
  • Presence of tandem lesions suggesting a likely need for proximal artery stenting during the thrombectomy procedure that would mandate post-operative dual antiplatelet therapy
  • Presence of other neurological or non-neurological co-morbidities, independently of the current stroke, that may lead to further deterioration in the subject's neurological status during the study period
  • Prolonged prothrombin time (PT) or activated partial thromboplastin time (aPTT)
  • Severe hypertension or hypotension
  • Blood glucose concentration \< 50 mg/dL
  • Prior exposure to any exogenous form of a recombinant variant of human APC
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
0 participants (actual)

Study arms

  • Active comparator
    10mg of 3K3A-APC

    3K3A-APC, q12h for up to 5 doses

    Biological: 3K3A-APC

  • Active comparator
    15mg of 3K3A-APC

    3K3A-APC, q12h for up to 5 doses

    Biological: 3K3A-APC

  • Active comparator
    30mg of 3K3A-APC

    3K3A-APC, q12h for up to 5 doses

    Biological: 3K3A-APC

  • Placebo comparator
    Placebo

    Matching placebo, q12h for up to 5 doses

    Other: Placebo

Interventions

  • Biological3K3A-APC

    3K3A-APC, diluted in 0.9% sodium chloride in water, given at 100 mL IV infusion

    Also known as: 3K3A-Activated Protein C

  • OtherPlacebo

    Matching placebo, 0.9% sodium chloride in water, given at 100 mL IV infusion

    Also known as: Matching Placebo

06

What researchers measure

Primary outcomes

  1. To evaluate the effect of 3K3A-APC on 90-day disability

    Day 90 mRS scores will be compared between groups using ordinal (shift) analysis

    Time frame: Day 90 mRS

Secondary outcomes

  1. To evaluate the safety of 3K3A-APC

    The percentage of subjects who experienced any treatment-related AE will be compared using a Fisher's exact test.

    Time frame: Baseline to Day 90

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 1, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05484154
Lead sponsor
ZZ Biotech, LLC
Responsible party
Sponsor
First posted
Aug 2, 2022
Start date
Oct 2024 (estimated)
Primary completion
Jul 2026 (estimated)
Completion
Oct 2026 (estimated)
Last update
Oct 1, 2024

Study contacts

Patrick D Lyden, MD
principal investigator · University of Southern California

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is withdrawn, as verified in Sep 2024. You cannot join it, but the record below documents what was studied.

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