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A Prospective Observational Study of Cerebrospinal Fluid Mitochondrial Biomarkers Measured by Flow Cytometry in Patients With Ischemic Stroke and Alzheimer Disease Controls

15. maj 2026 opdateret af: Ji Xunming,MD,PhD, Capital Medical University

This prospective observational study aims to investigate cerebrospinal fluid mitochondrial biomarkers in patients with ischemic stroke and Alzheimer disease controls who undergo diagnostic lumbar puncture for clinical indications at Xuanwu Hospital, Capital Medical University.

Residual cerebrospinal fluid samples will be analyzed by flow cytometry to quantify mitochondrial content, mitochondrial membrane potential, and cellular or vesicular source-related markers. The flow cytometry panel will include MitoTracker, JC-1, and membrane-associated markers including CD45, CD41, CD24, vWF, and EAAT1.

In patients with ischemic stroke, the study will further examine whether cerebrospinal fluid mitochondrial measurements are associated with neurological severity and functional outcomes, including admission and discharge NIHSS scores and the 90-day modified Rankin Scale score. Alzheimer disease patients undergoing diagnostic lumbar puncture will serve as disease controls for biomarker comparison.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Mitochondrial dysfunction is closely associated with ischemic brain injury, but the clinical relevance of extracellular or cell-associated mitochondrial signals in the cerebrospinal fluid of patients with ischemic stroke remains insufficiently characterized. Cerebrospinal fluid may provide a biologically informative compartment for assessing mitochondrial injury, mitochondrial membrane potential, and potential cellular sources of mitochondrial signals in neurological diseases.

This is a single-center, prospective, observational study conducted at Xuanwu Hospital, Capital Medical University. The study will enroll patients with ischemic stroke or Alzheimer disease who require diagnostic lumbar puncture as part of routine clinical evaluation between March 2026 and May 2026. No lumbar puncture will be performed solely for research purposes. After completion of clinically required testing, available residual cerebrospinal fluid will be collected for research flow cytometry analysis.

Flow cytometry will be used to evaluate cerebrospinal fluid mitochondrial content and related phenotypic features. MitoTracker will be used to detect mitochondrial signal, JC-1 will be used to assess mitochondrial membrane potential, and membrane-associated markers including CD45, CD41, CD24, vWF, and EAAT1 will be used to characterize potential leukocyte-associated, platelet-associated, neuronal/extracellular vesicle-associated, endothelial-associated, and astrocytic/glial-associated components.

The primary analysis will focus on patients with ischemic stroke and will evaluate the association between cerebrospinal fluid mitochondrial content and 90-day functional outcome measured by the modified Rankin Scale. Secondary analyses will examine associations between cerebrospinal fluid mitochondrial measurements and admission NIHSS, discharge NIHSS, and changes in NIHSS during hospitalization. Exploratory analyses will compare cerebrospinal fluid mitochondrial and membrane-marker profiles between ischemic stroke patients and Alzheimer disease controls.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

40

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

  • Kina
    • None Selected
      • Beijing, None Selected, Kina, 100053
        • Rekruttering
        • Xuanwu Hospital
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

The study population will include adult patients treated at Xuanwu Hospital, Capital Medical University between March 2026 and May 2026 who are diagnosed with ischemic stroke or Alzheimer disease and require diagnostic lumbar puncture for clinical indications. Only patients with available residual cerebrospinal fluid after completion of routine clinical testing will be included.

Beskrivelse

Inclusion Criteria:

  • Age 18 years or older. Patients treated at Xuanwu Hospital, Capital Medical University between March 2026 and May 2026.

Diagnosis of ischemic stroke or Alzheimer disease according to standard clinical diagnostic criteria.

Diagnostic lumbar puncture performed for clinical indications as part of routine medical care.

Availability of residual cerebrospinal fluid after completion of clinically required testing.

Ability to provide written informed consent, or availability of a legally authorized representative to provide consent when appropriate.

For ischemic stroke patients, availability of baseline neurological assessment and planned follow-up for 90-day modified Rankin Scale assessment.

Exclusion Criteria:

  • Lumbar puncture performed solely for research purposes rather than clinical indication.

Insufficient residual cerebrospinal fluid volume for research flow cytometry analysis.

Grossly bloody or severely contaminated cerebrospinal fluid sample that precludes reliable flow cytometry analysis.

Known central nervous system infection, malignant meningitis, or other inflammatory or neoplastic condition that, in the investigator's judgment, may substantially confound cerebrospinal fluid mitochondrial measurements.

Inability to obtain informed consent from the participant or legally authorized representative.

Missing key clinical outcome data, including admission NIHSS, discharge NIHSS, or planned 90-day mRS follow-up for ischemic stroke participants.

Any condition judged by the investigator to make the participant unsuitable for inclusion in the study.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Ischemic Stroke Cohort
Patients diagnosed with ischemic stroke who undergo diagnostic lumbar puncture for clinical indications at Xuanwu Hospital, Capital Medical University. Residual cerebrospinal fluid will be analyzed by flow cytometry to assess mitochondrial content, mitochondrial membrane potential, and membrane-associated markers. Clinical outcomes will include admission NIHSS, discharge NIHSS, and 90-day modified Rankin Scale score.
Diagnostisk test: Cerebrospinal Fluid Flow Cytometry
Residual cerebrospinal fluid obtained during clinically indicated diagnostic lumbar puncture will be analyzed by flow cytometry. The assay will measure mitochondrial signal using MitoTracker, mitochondrial membrane potential using JC-1, and membrane-associated markers including CD45, CD41, CD24, vWF, and EAAT1. The study does not assign participants to any treatment or diagnostic procedure beyond routine clinical care.
Alzheimer Disease Control Cohort
Patients diagnosed with Alzheimer disease who undergo diagnostic lumbar puncture for clinical indications at Xuanwu Hospital, Capital Medical University. Residual cerebrospinal fluid will be analyzed by the same flow cytometry panel and used as a disease control group for comparison of cerebrospinal fluid mitochondrial and membrane-marker profiles.
Diagnostisk test: Cerebrospinal Fluid Flow Cytometry
Residual cerebrospinal fluid obtained during clinically indicated diagnostic lumbar puncture will be analyzed by flow cytometry. The assay will measure mitochondrial signal using MitoTracker, mitochondrial membrane potential using JC-1, and membrane-associated markers including CD45, CD41, CD24, vWF, and EAAT1. The study does not assign participants to any treatment or diagnostic procedure beyond routine clinical care.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Association Between Cerebrospinal Fluid Mitochondrial Content and 90-Day Modified Rankin Scale Score in Ischemic Stroke
Tidsramme: From baseline cerebrospinal fluid collection to 90 days after stroke onset or hospital admission
The primary outcome is the association between cerebrospinal fluid mitochondrial content, measured by flow cytometry using MitoTracker-positive events or MitoTracker fluorescence intensity, and functional outcome at 90 days assessed by the modified Rankin Scale. The modified Rankin Scale ranges from 0 to 6, with higher scores indicating greater disability or death.
From baseline cerebrospinal fluid collection to 90 days after stroke onset or hospital admission

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Association Between Cerebrospinal Fluid Mitochondrial Content and Admission NIHSS Score
Tidsramme: At hospital admission or baseline clinical assessment
The association between cerebrospinal fluid mitochondrial content and baseline neurological deficit severity will be assessed using the National Institutes of Health Stroke Scale. Higher NIHSS scores indicate more severe neurological impairment.
At hospital admission or baseline clinical assessment
Association Between Cerebrospinal Fluid Mitochondrial Content and Discharge NIHSS Score
Tidsramme: At hospital discharge, up to 7 days after admission
The association between cerebrospinal fluid mitochondrial content and neurological deficit at discharge will be assessed using the NIHSS score recorded at hospital discharge.
At hospital discharge, up to 7 days after admission
Cerebrospinal Fluid Mitochondrial Membrane Potential Measured by JC-1
Tidsramme: At baseline cerebrospinal fluid collection
Mitochondrial membrane potential in cerebrospinal fluid-associated mitochondrial events will be assessed by JC-1 flow cytometry. JC-1 fluorescence parameters will be used to characterize mitochondrial polarization status.
At baseline cerebrospinal fluid collection
Comparison of Cerebrospinal Fluid Mitochondrial Biomarkers Between Ischemic Stroke and Alzheimer Disease Controls
Tidsramme: At baseline cerebrospinal fluid collection
Cerebrospinal fluid mitochondrial content, JC-1-related mitochondrial membrane potential measures, and membrane-associated marker profiles will be compared between ischemic stroke patients and Alzheimer disease controls.
At baseline cerebrospinal fluid collection

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Capital Medical University

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. marts 2026

Primær færdiggørelse (Anslået)

31. august 2026

Studieafslutning (Anslået)

30. november 2026

Datoer for studieregistrering

Først indsendt

15. maj 2026

Først indsendt, der opfyldte QC-kriterier

15. maj 2026

Først opslået (Faktiske)

22. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

22. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • CSF-MITO

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

The study is proceeding.

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Ingen

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Kliniske forsøg med Cerebrospinal Fluid Flow Cytometry

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