Assess the Safety and Efficacy of Sovateltide in Patients With Acute Cerebral Ischemic Stroke
RESPECT-ETB
A Multicentric, Randomized, Double-blind, Parallel, Placebo-controlled Phase III Study to Assess the Safety and Efficacy of Sovateltide in Patients With Acute Cerebral Ischemic Stroke.
1 other identifier
interventional
514
4 countries
42
Brief Summary
Extensive research is being conducted in search of neuroprotective agents for possible use in the acute phase of stroke and agents that can be used for neurorepair in later stages of stroke. Several trials have been conducted and are in progress using different pharmacological agents, but none of the studies involve the stimulation of ETB receptors to treat cerebral ischemic stroke. Sovateltide (IRL-1620, PMZ-1620) has been effective in animal models of cerebral ischemic stroke. Its safety and tolerability have been demonstrated in a human phase I study with 7 subjects. Clinical phase II and III results indicate that sovateltide is a novel, first-in-class, highly effective drug candidate for treating cerebral ischemic stroke. Safety and significant efficacy in improving the National Institutes of Health Stroke Scale (NIHSS), Modified Rankin scale (mRS), and Barthel index (BI) obtained in phase II and III studies in patients with cerebral ischemic stroke in India are convincing and encouraged us to investigate its safety and efficacy in cerebral ischemic stroke patients in the United States. Therefore, the plan is to conduct a phase III clinical study to evaluate the safety and efficacy of sovateltide therapy along with standard of care in patients of acute ischemic stroke.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for phase_3
Started Jul 2025
Shorter than P25 for phase_3
42 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
January 11, 2023
CompletedFirst Posted
Study publicly available on registry
January 19, 2023
CompletedStudy Start
First participant enrolled
July 24, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
September 1, 2026
ExpectedStudy Completion
Last participant's last visit for all outcomes
November 1, 2026
December 30, 2025
December 1, 2025
1.1 years
January 11, 2023
December 26, 2025
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Determine the efficacy of sovateltide in patients with acute cerebral ischemic stroke assessed by modified Rankin Scale (mRS) score of 0-2 at day 90 post-randomization.
The proportion of acute cerebral ischemic stroke patients having a good functional outcome with a modified Rankin Scale score of 0-2 on day 90 post-randomization.
Day 1 through Day 90
Secondary Outcomes (10)
Determine a good functional outcome in patients with acute cerebral ischemic stroke assessed by the National Institute of Health Stroke Scale (NIHSS) score of <6 at day 90 post-randomization.
Day 1 through Day 90
Determine a good functional outcome in patients with acute cerebral ischemic stroke assessed by the Barthel Index (BI) score of ≥90 at day 90 post-randomization.
Day 1 through Day 90
Determine an excellent functional outcome in patients with acute cerebral ischemic stroke assessed by a modified Rankin Scale score of 0-1 at day 90 post-randomization.
Day 1 through Day 90
Determine a change in Quality-of-life (QoL) as assessed by EuroQol-EQ-5D-5L and Stroke-Specific Quality of Life (SS-QOL) at days 30, 60, and 90 post-randomization.
Day 1 through Day 90
Determine the incidence of recurrent cerebral ischemic stroke within 90 days post-randomization.
Day 1 through Day 90
- +5 more secondary outcomes
Other Outcomes (5)
Determine a good functional outcome in patients with acute cerebral ischemic stroke assessed by mRS score of 0-2 at day 30 post-randomization.
Day 1 through Day 30
Determine a good functional outcome in patients with acute cerebral ischemic stroke assessed by the NIHSS score of <6 at day 30 post-randomization.
Day 1 through Day 30
Determine a good functional outcome in patients with acute cerebral ischemic stroke assessed by the BI score of ≥90 at day 30 post-randomization.
Day 1 through Day 30
- +2 more other outcomes
Study Arms (2)
Normal Saline + Standard of care
ACTIVE COMPARATORNormal saline will be used as a comparator. It will be available in a 5.0 mL vial. Three doses will be administered as an IV bolus over one minute every 3 hours ± 1 hour on day 1. The dose will be repeated on days 3 and 6 post randomization. The study drug will be administered as an IV bolus dose over 1 minute within 24 hours of the stroke onset.
Sovateltide + Standard of care
EXPERIMENTALThe test product is sovateltide. It is available as a lyophilized injection containing 30 µg of sovateltide in a 5.0 mL vial. Three doses of 0.3 μg/kg will be administered as an IV bolus over one minute every 3 hours ± 1 hour on day 1. The dose will be repeated on days 3 and 6 post randomization. The study drug will be administered as an IV bolus dose over 1 minute within 24 hours of the stroke onset.
Interventions
Normal saline to be used as vehicle in the phase-III study to assess efficacy of sovateltide in patients with acute cerebral ischemic stroke.
Phase-III study to assess efficacy of sovateltide in patients with acute cerebral ischemic stroke.
Eligibility Criteria
You may qualify if:
- Adult males or females aged 18 - 80 years of age.
- Consent obtained per national laws and regulations, and in accordance with the applicable ethics committee requirements prior to study procedures.
- A stroke is ischemic in origin that is diagnosed clinically and/or radiologically confirmed by Computed Tomography (CT) scan or diagnostic magnetic resonance imaging (MRI) prior to enrolment. No hemorrhage as proved by cerebral CT/MRI scan.
- Cerebral ischemic stroke patients presenting within 24 hours after the onset of symptoms with NIHSS score of ≥8 and \<20, NIHSS Level of Consciousness (1A) score \<2 at the time of screening. This includes cerebral ischemic stroke patients who completely recovered from earlier episodes before having a new or fresh stroke having a pre-stroke historical measure of mRS score of 0-2.
- The patient is \<24 hours from the time of stroke onset when the first dose of sovateltide is administered. Time of onset is when symptoms began; for stroke that occurred during sleep, time of onset is when the patient was last seen or was self- reported to be normal.
- Reasonable expectation of availability to receive the full sovateltide/placebo course of therapy and to be available for subsequent follow-up visits.
You may not qualify if:
- Patients receiving endovascular therapy or is a candidate for any surgical intervention for the treatment of stroke, which may include but not limited to endovascular techniques.
- Patients classified as comatose are defined as a patient who requires repeated stimulation to attend or is obtunded and requires strong or painful stimulation to make movements (NIHSS Level of Consciousness (1A) score ≥2).
- Evidence of intracranial hemorrhage (intracerebral hematoma, intraventricular hemorrhage, subarachnoid hemorrhage (SAH), epidural hemorrhage, acute or chronic subdural hematoma (SDH)) on the baseline CT or MRI scan.
- Known pregnancy and lactating women.
- Known medical history of neurological (other than current acute ischemic stroke) or psychiatric condition that, in the investigator's opinion, would confound the neurological and functional evaluations, lead to further deterioration of neurological status, or interfere with participation in this study.
- Concurrent participation in any other therapeutic clinical trial.
- Evidence of any other major life-threatening or serious medical condition that would prevent completion of the study protocol impair the assessment of outcome, or in which sovateltide therapy would be contraindicated or might cause harm to the patient.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Pharmazz, Inc.lead
Study Sites (42)
The University of Arizona - College of Medicine
Tuscon, Arizona, 85719, United States
Mercy Medical Group
Carmichael, California, 95608, United States
St. John's Regional Medical Center
Oxnard, California, 93030, United States
SSM Health Neurosciences
Bridgeton, Missouri, 63044, United States
OSU Wexner Medical Center
Columbus, Ohio, 43210, United States
UPMC Presbyterian Hospital
Pittsburgh, Pennsylvania, 15213, United States
CHI Memorial Neuroscience Institute
Chattanooga, Tennessee, 37404, United States
Houston Medical Neurological Institute
Houston, Texas, 77030, United States
Memorial Hermann Hospital
Houston, Texas, 77030, United States
Klinikum Altenburger Land GmbH
Altenburg, Altenburg, 04600, Germany
Universitaetsklinikum Goettingen
Göttingen, Lower Saxony, 37075, Germany
Klinikum der Stadt Ludwigshafen gGmbh
Rhein, Ludwigshafen Am, 67063, Germany
Muhlenkreiskliniken (MKK) - Johannes Wesling Klinikum Minden - Neurologische Klinik
Minden, North Rhine-Westphalia, 32427, Germany
Klinik fuer Neurologie, Stroke Unit und Fruehrehabilitation Dorstener Strae 151
Recklinghausen, Recklinghausen, 45657, Germany
Charite-Universitaetsmedizin Berlin
Berlin, State of Berlin, 12203, Germany
Universitätsklinikum Essen AöR
Essen, 45147, Germany
Universitätsklinikum Schleswig-Holstein AöR
Lübeck, 23538, Germany
Hospital Germans Trias i Pujol
Badalona, Barcelona, 08916, Spain
Hospital Universitari Vall d'Hebron
Barcelona, Barcelona, 08035, Spain
Complejo Hospitalario Universitario de Albacete
Albacete, Castille-La Mancha, 2006, Spain
Hospital Universitario La Paz
Madrid, Madrid, 28046, Spain
Hospital Universitario Puerta de Hierro Majadahonda
Madrid, Madrid, 28222, Spain
Hospital Clínico Universitario Virgen de Arrixaca
El Palmar, Murcia, 30120, Spain
Hospital Universitario Virgen Macarena
Seville, Sevilla, 41009, Spain
Hospital Universitari Joan XXIII
Tarragona, Tarragona, 43005, Spain
Instituto de Investigación Biomédica de A Coruña
A Coruña, 15006, Spain
Hospital Universitario Infanta Cristina (HUB)
Badajoz, 06080, Spain
Hospital Universitario de Cruces
Barakaldo, 48903, Spain
Institut Catala d'Oncologia (ICO) - Hospital Universitari Doctor Josep Trueta
Girona, 17007, Spain
Hospital Universitario Ramon y Cajal
Madrid, 28034, Spain
Hospital Clinico San Carlos
Madrid, 28040, Spain
Hospital Clinico Universitario de Santiago
Santiago, 15706, Spain
Hospital Universitario Virgen del Rocio
Seville, 41013, Spain
Hospital Clinico Universitario de Valencia
Valencia, 46010, Spain
Hospital Universitari i Politecnic La Fe de Valencia
Valencia, 46026, Spain
Hospital Universitario Miguel Servet
Zaragoza, 50009, Spain
Fairfield General Hospital
Bury, Bury, BL9 7TD, United Kingdom
National Hospital for Neurology & Neurosurgery
London, London, NW1 2BU, United Kingdom
King's College Hospital NHS Foundation Trust
London, London, SE5 9RS, United Kingdom
University Hospital Southampton
Southampton, Southampton, SO16 6YD, United Kingdom
New Cross Hospital - Royal Wolverhampton NHS Trust
Wolverhampton, Wolverhampton, WV10 0QP, United Kingdom
Hospitals NHS Foundation Trust - Royal Victoria Infirmary RVI
Newcastle, NE1 4LP, United Kingdom
Related Publications (15)
Gulati A, Adwani SG, Vijaya P, Agrawal NR, Ramakrishnan TCR, Rai HP, Jain D, Sundarachary NV, Pandian JD, Sardana V, Sharma M, Sidhu GK, Anand SS, Vibha D, Aralikatte S, Khurana D, Joshi D, Karadan U, Siddiqui MSI. Efficacy and Safety of Sovateltide in Patients with Acute Cerebral Ischaemic Stroke: A Randomised, Double-Blind, Placebo-Controlled, Multicentre, Phase III Clinical Trial. Drugs. 2024 Dec;84(12):1637-1650. doi: 10.1007/s40265-024-02121-5. Epub 2024 Nov 15.
PMID: 39542995BACKGROUNDRanjan AK, Gulati A. Sovateltide Mediated Endothelin B Receptors Agonism and Curbing Neurological Disorders. Int J Mol Sci. 2022 Mar 15;23(6):3146. doi: 10.3390/ijms23063146.
PMID: 35328566BACKGROUNDGulati A, Agrawal N, Vibha D, Misra UK, Paul B, Jain D, Pandian J, Borgohain R. Safety and Efficacy of Sovateltide (IRL-1620) in a Multicenter Randomized Controlled Clinical Trial in Patients with Acute Cerebral Ischemic Stroke. CNS Drugs. 2021 Jan;35(1):85-104. doi: 10.1007/s40263-020-00783-9. Epub 2021 Jan 11.
PMID: 33428177BACKGROUNDRamos MD, Briyal S, Prazad P, Gulati A. Neuroprotective Effect of Sovateltide (IRL 1620, PMZ 1620) in a Neonatal Rat Model of Hypoxic-Ischemic Encephalopathy. Neuroscience. 2022 Jan 1;480:194-202. doi: 10.1016/j.neuroscience.2021.11.027. Epub 2021 Nov 23.
PMID: 34826534BACKGROUNDRanjan AK, Briyal S, Gulati A. Sovateltide (IRL-1620) activates neuronal differentiation and prevents mitochondrial dysfunction in adult mammalian brains following stroke. Sci Rep. 2020 Jul 29;10(1):12737. doi: 10.1038/s41598-020-69673-w.
PMID: 32728189BACKGROUNDRanjan AK, Briyal S, Khandekar D, Gulati A. Sovateltide (IRL-1620) affects neuronal progenitors and prevents cerebral tissue damage after ischemic stroke. Can J Physiol Pharmacol. 2020 Sep;98(9):659-666. doi: 10.1139/cjpp-2020-0164. Epub 2020 Jun 23.
PMID: 32574518BACKGROUNDGulati A, Hornick MG, Briyal S, Lavhale MS. A novel neuroregenerative approach using ET(B) receptor agonist, IRL-1620, to treat CNS disorders. Physiol Res. 2018 Jun 27;67(Suppl 1):S95-S113. doi: 10.33549/physiolres.933859.
PMID: 29947531BACKGROUNDBriyal S, Nguyen C, Leonard M, Gulati A. Stimulation of endothelin B receptors by IRL-1620 decreases the progression of Alzheimer's disease. Neuroscience. 2015 Aug 20;301:1-11. doi: 10.1016/j.neuroscience.2015.05.044. Epub 2015 May 27.
PMID: 26022359BACKGROUNDLeonard MG, Prazad P, Puppala B, Gulati A. Selective Endothelin-B Receptor Stimulation Increases Vascular Endothelial Growth Factor in the Rat Brain during Postnatal Development. Drug Res (Stuttg). 2015 Nov;65(11):607-13. doi: 10.1055/s-0034-1398688. Epub 2015 Mar 25.
PMID: 25806822BACKGROUNDBriyal S, Shepard C, Gulati A. Endothelin receptor type B agonist, IRL-1620, prevents beta amyloid (Abeta) induced oxidative stress and cognitive impairment in normal and diabetic rats. Pharmacol Biochem Behav. 2014 May;120:65-72. doi: 10.1016/j.pbb.2014.02.008. Epub 2014 Feb 20.
PMID: 24561065BACKGROUNDLeonard MG, Gulati A. Endothelin B receptor agonist, IRL-1620, enhances angiogenesis and neurogenesis following cerebral ischemia in rats. Brain Res. 2013 Aug 28;1528:28-41. doi: 10.1016/j.brainres.2013.07.002. Epub 2013 Jul 11.
PMID: 23850649BACKGROUNDLeonard MG, Briyal S, Gulati A. Endothelin B receptor agonist, IRL-1620, provides long-term neuroprotection in cerebral ischemia in rats. Brain Res. 2012 Jun 29;1464:14-23. doi: 10.1016/j.brainres.2012.05.005. Epub 2012 May 9.
PMID: 22580085BACKGROUNDLeonard MG, Briyal S, Gulati A. Endothelin B receptor agonist, IRL-1620, reduces neurological damage following permanent middle cerebral artery occlusion in rats. Brain Res. 2011 Oct 28;1420:48-58. doi: 10.1016/j.brainres.2011.08.075. Epub 2011 Sep 7.
PMID: 21959172BACKGROUNDKeam SJ. Sovateltide: First Approval. Drugs. 2023 Sep;83(13):1239-1244. doi: 10.1007/s40265-023-01922-4.
PMID: 37486545BACKGROUNDBriyal S, Ranjan AK, Gulati A. Oxidative stress: A target to treat Alzheimer's disease and stroke. Neurochem Int. 2023 May;165:105509. doi: 10.1016/j.neuint.2023.105509. Epub 2023 Mar 11.
PMID: 36907516BACKGROUND
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Intervention Hierarchy (Ancestors)
Study Officials
- STUDY CHAIR
Anil Gulati, MD, PhD
Pharmazz, Inc.
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- QUADRUPLE
- Who Masked
- PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
- Masking Details
- In this double-blind study, the subject and all relevant personnel involved with the conduct and interpretation of the study (including investigator, investigational site personnel, and the sponsor or designee's staff) will remain blinded to the identity of the Investigational Product (IP) assigned and the randomization codes. The final randomization list will be kept strictly confidential, filed securely by the independent biostatistician, and accessible only to authorized persons as per the sponsor's standard operating procedures until the completion of the study.
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
January 11, 2023
First Posted
January 19, 2023
Study Start
July 24, 2025
Primary Completion (Estimated)
September 1, 2026
Study Completion (Estimated)
November 1, 2026
Last Updated
December 30, 2025
Record last verified: 2025-12
Data Sharing
- IPD Sharing
- Will share
- Shared Documents
- STUDY PROTOCOL
- Time Frame
- December 2027
- Access Criteria
- Following completion of the trial in 2027, the anonymized patient datasets created and/or analyzed for the current study can be accessed from the corresponding author at a reasonable request from a bona fide researcher/research group.
Following completion of the trial in 2027, the anonymized patient datasets created and/or analyzed for the current study can be accessed from the corresponding author at a reasonable request from a bona fide researcher/research group.