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CompletedNCT06707987Updated Dec 5, 2025

Post-registration Trial of the Non-immunogenic Staphylokinase in Acute Ischemic Stroke (FORPI Registry)

An observational study in Acute Ischemic Stroke, sponsored by Supergene, LLC. Completed at 1 site in Russia. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-12-05.

Sponsored by Supergene, LLC · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
23,250
Ages
18 Years and older
Sex
All
01

Study summary

The aim of FORPI Registry is to study the safety and efficacy of the non-immunogenic staphylokinase in patients with acute ischemic stroke in routine clinical practice.

Read the detailed description

Acute ischemic stroke is caused by the formation of blood clot in the major vessel which gives blood supply to a certain part of the brain. New approaches to the treatment of acute ischemic stroke include the use of modern highly effective methods of reperfusion of brain tissue in the first hours of the disease, aimed at restoring blood flow in the affected vessel, which helps prevent the development of irreversible damage to brain tissue or reduce its volume, i.e. minimize the severity of residual neurological deficit.

In December 2019, a multicenter, open-label, randomized non-inferiority trial of the efficacy and safety of the non-immunogenic staphylokinase (Fortelyzin®) compared with alteplase (Actilyse®) in patients with acute ischemic stroke (FRIDA) was completed (NCT03151993).

The primary efficacy outcome in both the non-immunogenic staphylokinase and alteplase groups, as well as in their subgroups depending on age, body weight, onset to treatment time, baseline NIHSS, localization and subtype of acute ischemic stroke showed that the non-immunogenic staphylokinase administered as a single bolus in a dose of 10 mg regardless of body weight is non-inferior to alteplase, administered as a bolus infusion at a dose of 0.9 mg/kg body weight, at a maximum dose of 90 mg in the treatment of patients with acute ischemic stroke within 4.5 hours from the symptoms onset. The non-immunogenic staphylokinase has demonstrated high safety profile. The indication "acute ischemic stroke" is included in the Instructions for medical use of the non-immunogenic staphylokinase. In routine clinical practice, the non-immunogenic staphylokinase is used for acute ischemic stroke treatment since 2021.

The aim of FORPI Registry is to study the safety and efficacy of the non-immunogenic staphylokinase in patients with acute ischemic stroke in routine clinical practice.

02

Conditions studied

  • Acute Ischemic Stroke

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Keywords

  • Acute ischemic stroke
  • Fibrinolysis
  • Thrombolysis
  • Non-immunogenic staphylokinase
03

In context

Ischemic Stroke

2,593 studies on the registry are indexed under Ischemic Stroke; 930 are open to participants now.

This study's enrollment of 23,250 is above the median of 300 across 777 observational studies indexed under Ischemic Stroke.

Browse Ischemic Stroke studies →

Lead sponsor

Supergene, LLC is the lead sponsor of 9 studies on the registry; 3 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Men and women aged 18 years and older with verified acute ischemic stroke, less than 4.5 h symptoms onset to treatment, who received a single intravenous bolus of the non-immunogenic staphylokinase (10 mg).

Inclusion criteria

  • Men and women aged 18 years and older.
  • Verified diagnosis of acute ischemic stroke.
  • The time from the symptoms onset is no more than 4.5 hours.
  • Thrombolysis with the non-immunogenic staphylokinase, 10 mg as a single intravenous bolus.

Exclusion criteria

Exclusion Criteria:

  • The time from the symptoms onset is more than 4.5 hours or the time of the symptoms onset is unknown.
  • Increased sensitivity to the non-immunogenic staphylokinase.
  • Systolic blood pressure above 185 mm Hg or diastolic blood pressure above 110 mm Hg or the need in the drug administration to reduce blood pressure to these levels.
  • Neuroimaging (CT, MRI) signs of intracranial hemorrhage, brain tumors, arteriovenous malformation, brain abscess, aneurysm of cerebral vessels.
  • Surgery on the brain or spinal cord.
  • Suspicion of subarachnoid hemorrhage.
  • Signs of severe stroke: clinical signs (stroke scale NIH > 25), neuroimaging (according to CT of the brain and / or MRI of the brain in the DWI, the ischemia focuses on the territory of more than 1/3 of the CMA pool).
  • Simultaneous reception of oral anticoagulants, for example, warfarin with INR> 1.3.
  • The use of direct anticoagulants (heparin, heparinoids) in the preceding stroke of 48 h with APTT values above the norm.
  • Prior stroke or severe head injury within 3 months.
  • Significant regression of neurological symptoms during the observation of the patient before thrombolysis.
  • Hemorrhagic stroke or stroke, unspecified in history.
  • Strokes of any genesis in the history of a patient with diabetes mellitus.
  • Gastrointestinal bleeding or bleeding from the genitourinary system in the last 3 weeks. Confirmed exacerbations of gastric ulcer and duodenal ulcer during the last 3 months.
  • Extensive bleeding now or within the previous 6 months.
  • Severe liver disease, including liver failure, cirrhosis, portal hypertension (with varicose veins of the esophagus), active hepatitis.
  • Acute pancreatitis.
  • Bacterial endocarditis, pericarditis.
  • Aneurysms of arteries, malformations of arteries and veins. Suspicion of exfoliating aortic aneurysm.
  • Neoplasms with an increased risk of bleeding.
  • Large operations or severe injuries within the last 14 days, minor surgery or invasive manipulation in the last 10 days.
  • Puncture of uncompensated arteries and veins during the last 7 days.
  • Prolonged or traumatic cardiopulmonary resuscitation (more than 2 min).
  • Pregnancy, obstetrics, 10 days after birth.
  • The number of platelets is less than 100,000 / μL.
  • Blood glucose less than 2.7 mmol / L or more than 22.0 mmol / L.
  • Hemorrhagic diathesis, including renal and hepatic insufficiency.
  • Data on bleeding or acute trauma (fracture) at the time of examination.
  • Seizures in the onset of the disease, if there is no certainty that the seizure is a clinical manifestation of acute ischemic stroke with a postictal residual deficiency.
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
23,250 participants (actual)
Target follow-up
90 Days
Patient registry
Yes

Groups and cohorts

  • Non-immunogenic staphylokinase

    Drug: non-immunogenic staphylokinase

    Drug: Non-immunogenic staphylokinase

Interventions

  • DrugNon-immunogenic staphylokinase

    Drug: non-immunogenic staphylokinase 10 mg as a single intravenous bolus Other Names: Fortelyzin®

    Also known as: Fortelyzin®

06

What researchers measure

Primary outcomes

  1. Modified Rankin Scale (mRS) score of 0-2 on day 90 after drug administration

    The number of patients with Modified Rankin Scale (mRS) scores 0-2 on day 90 after drug administration, where 0 - No symptoms, 1 - No significant disability, 2 - Slight disability.

    Time frame: day 90 after drug administration

Secondary outcomes

  1. mRS score on day 90 after drug administration

    The median of mRS score on day 90 after drug administration, where: 0 - No symptoms, 1 - No significant disability, 2 - Slight disability, 3 - Moderate disability, 4 - Moderately severe disability, 5 - Severe disability, 6 - Dead.

    Time frame: day 90 after drug administration

  2. The National Institutes of Health Stroke Scale (NIHSS) at 24 hours after drug administration

    The median of The National Institutes of Health Stroke Scale (NIHSS) at 24 h after drug administration, where: 0 - No stroke symptoms, 1-4 - Minor stroke, 5-15 - Moderate stroke, 16-20 - Moderate to severe stroke, 21-42 - Severe stroke.

    Time frame: 24 hours after drug administration

  3. NIHSS on day 7 after drug administration

    The median of NIHSS on discharge

    Time frame: day 7 after drug administration

Other outcomes

  1. All-cause mortality

    The number of death from any causes during 90 days after drug administration

    Time frame: day 90 after drug administration

  2. Intracranial haemorrhage

    The number of intracranial haemorrhage during 90 days after drug administration

    Time frame: day 90 after drug administration

  3. Symptomatic intracerebral haemorrhage

    The number of symptomatic intracranial haemorrhage (sICH) defined as an NIHSS decline of ≥4 points compared with baseline NIHSS or the lowest NIHSS value or death between baseline and 7 days, associated with any haemorrhage judged by core lab evaluation to be responsible for the decline. Blood may be anywhere in the intracranial space including in the intraventricular, intraparenchymal and/or subarachnoid space (modified ECASS III definition) during 90 days after drug administration

    Time frame: day 90 after drug administration

  4. Major bleedings

    The number of major bleedings (according to BARC classification type 3 and 5) during 90 days after drug administration

    Time frame: day 90 after drug administration

  5. Thrombectomy

    The number of thrombectomy during 90 days after drug administration

    Time frame: day 90 after drug administration

  6. Allergic reactions

    The number of allergic reactions during 90 days after drug administration

    Time frame: day 90 after drug administration

  7. Pulmonary embolism

    The number of pulmonary embolism during 90 days after drug administration

    Time frame: day 90 after drug administration

07

Study locations

1 site
  • Federal Brain and Neurotechnology Center
    Moscow, 117513, Russia
08

References and documents

Publications

  • Gusev EI, Martynov MY, Nikonov AA, Shamalov NA, Semenov MP, Gerasimets EA, Yarovaya EB, Semenov AM, Archakov AI, Markin SS; FRIDA Study Group. Non-immunogenic recombinant staphylokinase versus alteplase for patients with acute ischaemic stroke 4.5 h after symptom onset in Russia (FRIDA): a randomised, open label, multicentre, parallel-group, non-inferiority trial. Lancet Neurol. 2021 Sep;20(9):721-728. doi: 10.1016/S1474-4422(21)00210-6. PubMed 34418399 ↗
  • Alasheev AM, Lantsova EV, Tretyakov DA. [Efficacy and safety of non-immunogenic staphylokinase in the ischemic stroke in real-world clinical practice in the Sverdlovsk region]. Zh Nevrol Psikhiatr Im S S Korsakova. 2023;123(7):74-79. doi: 10.17116/jnevro202312307174. Russian. PubMed 37490668 ↗
  • Ramazanov GR, Kokov LS, Shamalov NA, Kovaleva EA, Klychnikova EV, Akhmatkhanova LK, Cheboksarov DV, Khamidova LT, Muslimov RS, Rybalko NV, Petrikov SS. [First case of thrombolysis with non-immunogenic staphylokinase in a patient with ischemic stroke receiving dabigatran etexilate followed by thrombectomy]. Zh Nevrol Psikhiatr Im S S Korsakova. 2022;122(6):145-151. doi: 10.17116/jnevro2022122061145. Russian. PubMed 35758961 ↗
  • Kulesh AA, Syromyatnikova LI, Krapivin S, Astanin PV. [Comparison of the effectiveness of non-immunogenic staphylokinase and alteplase for intravenous thrombolysis in ischemic stroke: analysis of hospital registry data]. Zh Nevrol Psikhiatr Im S S Korsakova. 2024;124(7):139-144. doi: 10.17116/jnevro2024124071139. Russian. PubMed 39113454 ↗
  • Gusev EI, Martynov MY, Shamalov NA, Yarovaya EB, Semenov MP, Semenov AM, Orlovsky AA, Kutsenko VA, Nikonov AA, Aksentiev SB, Yunevich DS, Alasheev AM, Androfagina OV, Bobkov VV, Choroshavina KV, Gorbachev VI, Korobeynikov IV, Greshnova IV, Dobrovolskiy AV, Elemanov UA, Zhukovskaya NV, Zakharov SA, Chirkov AN, Korsunskaya LL, Nesterova VN, Nikonova AA, Nizov AA, Girivenko AI, Ponomarev EA, Popov DV, Pribylov SA, Semikhin AS, Timchenko LV, Jadan ON, Fedyanin SA, Chefranova ZY, Lykov YA, Chuprina SE, Vorobev AA, Archakov AI, Markin SS. [Nonimmunogenic staphylokinase in the treatment of acute ischemic stroke (FRIDA trial results)]. Zh Nevrol Psikhiatr Im S S Korsakova. 2022;122(7):56-65. doi: 10.17116/jnevro202212207156. Russian. PubMed 35904293 ↗
  • Shamalov NA, Martynov MY, Yarovaya EB, Chefranova ZY, Kutsenko VA, Semenov AM, Ivanov SV, Semenov MP, Markin SS, Gusev EI; FORPI Study Group. Thrombolysis With the Non-Immunogenic Staphylokinase for Acute Ischemic Stroke in the FORPI Registry: An Observational Study. Stroke. 2026 Feb;57(2):394-403. doi: 10.1161/STROKEAHA.125.051115. Epub 2025 Nov 26. PubMed 41293810 ↗
  • Shamalov NA, Chefranova ZY, Yarovaya EB, Kutsenko VA, Marskaya NA, Semenov AM, Semenov MP, Ivanov SV, Romashova YA, Markin SS. Prognostic outcome of intravenous thrombolysis with non-immunogenic staphylokinase in patients aged >/= 60 years with acute ischemic stroke by THRIVE scale. J Thromb Thrombolysis. 2026 Apr;59(4):993-1002. doi: 10.1007/s11239-025-03212-0. Epub 2025 Nov 16. PubMed 41243072 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 5, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06707987
Lead sponsor
Supergene, LLC
Collaborators
Federal Center of Cerebrovascular Pathology and Stroke, Russian Federation Ministry of Health
Responsible party
Sponsor
First posted
Nov 27, 2024
Start date
Mar 1, 2021
Primary completion
Dec 31, 2024
Completion
Feb 1, 2025
Last update
Dec 5, 2025

Study contacts

Nikolay A. Shamalov, MD, PhD Prof
principal investigator · Federal Brain and Neurotechnology Center

Oversight

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

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This study is completed, as verified in Nov 2025. You cannot join it, but the record below documents what was studied.

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