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Cerebral IschemiaNCT04998357

Autologous Mitochondrial Transplant for Cerebral Ischemia

A study testing Endovascular autologous mitochondrial transplantation in people with Cerebral Ischemia, run by University of Washington at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

The investigators propose to infuse healthy autologous mitochondria into cerebral vessels supplying brain tissue experiencing ischemia in patients who undergo standard-of- care endovascular reperfusion therapy. Read more about this study

Who is it for?
Ages 18 to 85 years
Conditions the study is for
Cerebral Ischemia
What is being tested?
Endovascular autologous mitochondrial transplantation
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
20 participants
Where
1 siteUnited States
Study dates
29 Apr 2021to 29 Oct 2026
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 85 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Eligible for endovascular thrombectomy to treat acute large vessel occlusion
  • Eligible for angioplasty (microcatheter-based balloon/mechanical and chemical angioplasty) to treat acute cerebral vasospasm after aneurysmal subarachnoid hemorrhage
  • Subjects for whom there is likely to be enough time to obtain meaningful consent from patient or legally-authorized representative

Who cannot join

  • Unable to receive a brain MRI scan
  • Known mitochondrial disease
  • Hemodynamically unstable patients in whom standard of care endovascular reperfusion treatment cannot safely be performed or completed

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Study Coordinator contact

206-897-5802

sanslab@uw.edu

United States1 site, 1 recruiting
  • Harborview Medical Center

    Seattle, Washington, 98104

    Melanie Walker, MD, 206-744-3000

    Michael Levitt, MD

    Recruiting

Other trials in United States

About this study

Official title: Study Title: Autologous Mitochondrial Transplant for Cerebral Ischemia

The investigators propose to infuse healthy autologous mitochondria into cerebral vessels supplying brain tissue experiencing ischemia in patients who undergo standard-of- care endovascular reperfusion therapy.

Read the detailed description

Stroke is one of the leading causes of morbidity and mortality worldwide. More than 80% of strokes are the result of ischemia caused by blockage of one or more cerebral arteries. Lack of blood supply starves brain cells of necessary glucose and oxygen, and disturbs cellular homeostasis, eventually resulting in neuronal death.

Mitochondria are tiny organelles present in nearly all types of human cells and are vital to our survival. Much like a battery, they generate most of our adenosine triphosphate (ATP), the energy currency of the cell. Mitochondria are also involved in other tasks, such as signaling between cells and cell death. All these functions can be impaired during ischemia because of the damage caused to mitochondria.

Based on many preclinical studies in animals, damage caused by ischemia can be reversed after infusing healthy mitochondria into injured tissues. An ongoing clinical trial in human hearts at Boston Children's Hospital has also demonstrated that transplanting autologous mitochondria via infusion or direct injection is well-tolerated and safe.

The investigators at the University of Washington are recruiting subjects for a first-in-human-brain trial to confirm the safety of autologous mitochondrial transplant during brain ischemia. The transplantation will be performed within the same procedure as the clinically indicated reperfusion treatment.

During standard-of-care endovascular treatment for cerebral ischemia, the investigators will obtain a very small biopsy from the muscle tissue adjacent to our surgical access site. Muscle tissue will be processed at bedside to extract the autologous mitochondria as performed in prior human cardiac trial and validated in animal studies. The endovascular treatment proceeds without disruption as clinically indicated, and the mitochondria are infused into the brain artery via micro-catheter during reperfusion.

Being tested
Endovascular autologous mitochondrial transplantation
Keywords
autologous mitochondrial transplantation, ischemic stroke
Medical subject headings
Brain Ischemia, Ischemic Stroke

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Endovascular autologous mitochondrial transplantationOther

    During standard-of-care endovascular reperfusion procedure, subjects will have autologous mitochondria infused via microcatheter into ischemic brain.

Study groups in NCT04998357
Study groupRoleWhat they receive
TransplantationExperimentalEndovascular infusion
Receives: Other: Endovascular autologous mitochondrial transplantation

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Incidence of severe adverse events during mitochondrial infusion

    Cerebral angiography is performed and reviewed in real-time throughout the standard of care reperfusion treatment, including before and after microcatheter infusion of mitochondria.

    Measured: Through completion of reperfusion therapy, up to one hour post-infusion

  2. Incidence of severe adverse vascular events immediately post-mitochondrial infusion

    Post-reperfusion therapy, CT scans are performed as part of the standard of care. The post-procedure CT scan will be reviewed for severe adverse events associated with the microcatheter infusion of mitochondria.

    Measured: Up to 3 hours post-mitochondrial infusion

  3. Incidence of severe systemic adverse events associated with mitochondrial infusion

    Post-reperfusion therapy, peripheral blood studies are performed and reviewed as part of the standard of care to assess systemic function. These include complete blood counts, coagulation studies, and serum chemistry.

    Measured: Up to seven days after procedure completion

  4. Incidence of severe adverse events related to muscle biopsy

    Muscle biopsy is obtained through the same incision as vascular access. The access site is evaluated via physical examination by medical personnel for six hours post-intervention per standard of care protocol.

    Measured: Up to six hours after procedure completion

Secondary outcomes (1)
  1. Reduction of infarct volume post-mitochondrial infusion

    Patients undergo brain MRI as part of standard of care evaluation after reperfusion therapy. These studies are compared with initial brain imaging studies obtained prior to reperfusion therapy.

    Measured: Up to seven days after procedure completion.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted10 Aug 2021
  2. Study start29 Apr 2021
  3. Primary completion29 Apr 2026 (estimated)
  4. Study completion29 Oct 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
20 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04998357
Sponsor's protocol ID
STUDY00006638
Status last verified
May 2025
First submitted
21 Jul 2021
Last updated
21 May 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Preble JM, Pacak CA, Kondo H, MacKay AA, Cowan DB, McCully JD. Rapid isolation and purification of mitochondria for transplantation by tissue dissociation and differential filtration. J Vis Exp. 2014 Sep 6;(91):e51682. doi: 10.3791/51682.

    PubMed 25225817
  • Guariento A, Piekarski BL, Doulamis IP, Blitzer D, Ferraro AM, Harrild DM, Zurakowski D, Del Nido PJ, McCully JD, Emani SM. Autologous mitochondrial transplantation for cardiogenic shock in pediatric patients following ischemia-reperfusion injury. J Thorac Cardiovasc Surg. 2021 Sep;162(3):992-1001. doi: 10.1016/j.jtcvs.2020.10.151. Epub 2020 Dec 1.

    PubMed 33349443
  • Weixler V, Lapusca R, Grangl G, Guariento A, Saeed MY, Cowan DB, Del Nido PJ, McCully JD, Friehs I. Autogenous mitochondria transplantation for treatment of right heart failure. J Thorac Cardiovasc Surg. 2021 Jul;162(1):e111-e121. doi: 10.1016/j.jtcvs.2020.08.011. Epub 2020 Aug 10.

    PubMed 32919774
  • Doulamis IP, Guariento A, Duignan T, Kido T, Orfany A, Saeed MY, Weixler VH, Blitzer D, Shin B, Snay ER, Inkster JA, Packard AB, Zurakowski D, Rousselle T, Bajwa A, Parikh SM, Stillman IE, Del Nido PJ, McCully JD. Mitochondrial transplantation by intra-arterial injection for acute kidney injury. Am J Physiol Renal Physiol. 2020 Sep 1;319(3):F403-F413. doi: 10.1152/ajprenal.00255.2020. Epub 2020 Jul 20.

    PubMed 32686525
  • Orfany A, Arriola CG, Doulamis IP, Guariento A, Ramirez-Barbieri G, Moskowitzova K, Shin B, Blitzer D, Rogers C, Del Nido PJ, McCully JD. Mitochondrial transplantation ameliorates acute limb ischemia. J Vasc Surg. 2020 Mar;71(3):1014-1026. doi: 10.1016/j.jvs.2019.03.079. Epub 2019 Jul 26.

    PubMed 31353269
  • Ramirez-Barbieri G, Moskowitzova K, Shin B, Blitzer D, Orfany A, Guariento A, Iken K, Friehs I, Zurakowski D, Del Nido PJ, McCully JD. Alloreactivity and allorecognition of syngeneic and allogeneic mitochondria. Mitochondrion. 2019 May;46:103-115. doi: 10.1016/j.mito.2018.03.002. Epub 2018 Mar 26.

    PubMed 29588218
  • McCully JD, Levitsky S, Del Nido PJ, Cowan DB. Mitochondrial transplantation for therapeutic use. Clin Transl Med. 2016 Mar;5(1):16. doi: 10.1186/s40169-016-0095-4. Epub 2016 Apr 29.

    PubMed 27130633
  • Hayakawa K, Esposito E, Wang X, Terasaki Y, Liu Y, Xing C, Ji X, Lo EH. Transfer of mitochondria from astrocytes to neurons after stroke. Nature. 2016 Jul 28;535(7613):551-5. doi: 10.1038/nature18928.

    PubMed 27466127
  • Pluchino S, Peruzzotti-Jametti L, Frezza C. Astrocyte power fuels neurons during stroke. Swiss Med Wkly. 2016 Nov 10;146:w14374. doi: 10.4414/smw.2016.14374. eCollection 2016. No abstract available.

    PubMed 27878792
  • Bambrick L, Kristian T, Fiskum G. Astrocyte mitochondrial mechanisms of ischemic brain injury and neuroprotection. Neurochem Res. 2004 Mar;29(3):601-8. doi: 10.1023/b:nere.0000014830.06376.e6.

    PubMed 15038607
  • Wu M, Gu X, Ma Z. Mitochondrial Quality Control in Cerebral Ischemia-Reperfusion Injury. Mol Neurobiol. 2021 Oct;58(10):5253-5271. doi: 10.1007/s12035-021-02494-8. Epub 2021 Jul 18.

    PubMed 34275087
  • Norat P, Soldozy S, Sokolowski JD, Gorick CM, Kumar JS, Chae Y, Yagmurlu K, Prada F, Walker M, Levitt MR, Price RJ, Tvrdik P, Kalani MYS. Mitochondrial dysfunction in neurological disorders: Exploring mitochondrial transplantation. NPJ Regen Med. 2020 Nov 23;5(1):22. doi: 10.1038/s41536-020-00107-x.

    PubMed 33298971
  • Norat P, Sokolowski JD, Gorick CM, Soldozy S, Kumar JS, Chae Y, Yagmurlu K, Nilak J, Sharifi KA, Walker M, Levitt MR, Klibanov AL, Yan Z, Price RJ, Tvrdik P, Kalani MYS. Intraarterial Transplantation of Mitochondria After Ischemic Stroke Reduces Cerebral Infarction. Stroke Vasc Interv Neurol. 2023 May;3(3):e000644. doi: 10.1161/svin.122.000644. Epub 2023 Mar 2.

    PubMed 37545759
  • Miralles FJ, Prijoles KL, Winter A, Levitt MR, Sancak Y, Walker M. Periprocedural therapeutics do not impair extracellular mitochondrial viability in transplantation. J Cereb Blood Flow Metab. 2026 Feb;46(2):350-358. doi: 10.1177/0271678X251340232. Epub 2025 May 14.

    PubMed 40367391
  • Walker, M., Federico, E., Sancak, Y. et al. Mitochondrial Transplantation in Ischemic Stroke: Insights from a First-in-Human Brain Trial. Curr Transpl Rep 11, 53-62 (2024). https://doi.org/10.1007/s40472-024-00428-6

Questions about this trial

What is this clinical trial studying?

A study testing Endovascular autologous mitochondrial transplantation in people with Cerebral Ischemia, run by University of Washington at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 21 May 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Study Coordinator (206-897-5802, sanslab@uw.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Incidence of severe adverse events during mitochondrial infusion (time frame: Through completion of reperfusion therapy, up to one hour post-infusion). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04998357, which also lists 17 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 May 2025.

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