Can an enzyme calm the immune storm after a stroke?
NCT ID NCT05880524
First seen Sep 11, 2026 · Last updated Sep 11, 2026
Summary
Researchers are testing whether an intravenous dose of the enzyme dornase alfa can reduce the body's inflammatory response after an acute ischemic stroke. The trial enrolls 36 adults who arrive at the hospital within 12 hours of symptom onset and have moderate to severe stroke symptoms. Participants receive either dornase alfa or a saline placebo twice within about a day of symptom onset, and researchers measure inflammatory markers in their blood over the following days.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Dornase alfa, an enzyme drug given intravenously
- What this could lead to
- If it works, this could offer a way to calm the body's inflammatory response after a stroke and limit further brain damage.
- What could go wrong
- This is a small phase 2 trial with 36 participants, so any signal may not hold in larger studies. DNase can also affect blood clotting and immune defenses, which researchers must watch closely.
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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About 36 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Oct 2026
An estimate. Start dates often move.
- Expected to finish
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Jul 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
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: * Patients with suspected acute ischemic stroke with symptom onset (last-seen-well) until Investigational drug application of less than 12 hours. * Consent to participate in the study. * Age ≥ 18 years. * NIHSS ≥10 at admission. Exclusion Criteria: * Presence of any of the following conditions: Sinus or cerebral venous thrombosis, intracerebral haemorrhage, subarachnoid haemorrhage on qualified imaging (cCT with CT-A or MRI with MR-A). However, petechial haemorrhagic transformations of the index infarct and cerebral microhaemorrhages may be included. * Active malignant tumour disease in the last 6 months. * Current known immunosuppression due to immunomodulatory medication with immunosuppressive dose or underlying immunosuppressive disease (e.g. HIV). * Acute fulminant infectious disease in the last 7 days (fever \> 38.5°C or suspected by the Investigator). * Breastfeeding or pregnant woman, women of childbearing age without known use of contraceptives with positive urine or serum beta-human choriogonadotropin test. * Ischemic stroke or myocardial infarction in the previous 30 days. * Surgery in the previous 30 days, except minor dermatological or gynaecological surgery without anaesthesia and wound healing disorders and patients with thrombectomy. * Estimated or known weight \> 100 kg. * Known allergies or intolerance to dornase alfa (Pulmozyme) or recombinant protein products derived from Chinese hamster ovary cells. * Thrombocytopenia, leukocyte count \<1500/μl. * Known participation in another clinical trial investigating a drug and/or medical product in the last 7 days before study inclusion. * Severe renal insufficiency with GFR≤29 ml/min/ 1.73m³ and/or renal insufficiency requiring dialysis.
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
5 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Charité Universitätsmedizin
RECRUITINGBerlin, Germany
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Institute for Stroke and Dementia Research, Ludwig Maximilian University Munich, University Hospital
NOT_YET_RECRUITINGMunich, Bavaria, 81377, Germany
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MHH Hannover
RECRUITINGHanover, Germany
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TUM Klinikum München
NOT_YET_RECRUITINGMunich, Germany
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University Medical Center Hamburg-Eppendorf
RECRUITINGHamburg, Germany
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Other studies related to the condition(s) this trial covers.
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- Heart hole or stroke trigger? global registry tracks who gets closure and what happens next
- Two ways to catch a hidden heart rhythm after stroke
- Blood test may reveal who recovers after a stroke
- Can a smart bracelet and app stop a second stroke?
- Pharmacist and coach team takes aim at blood pressure after stroke