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Micro-nanoplastic Exposure and Coronary Microcirculatory Dysfunction as Well as Cardiovascular Outcomes

19. august 2026 opdateret af: Beijing Anzhen Hospital

Association of Micro-Nanoplastic Exposure With Coronary Microvascular Dysfunction and Subsequent Cardiovascular Outcomes: A Prospective Cohort Study

With strict quality control procedures applied throughout microplastic testing, this study will assess the association between baseline circulating micro-nanoplastic exposure and coronary microvascular dysfunction, as well as subsequent long-term cardiovascular outcomes.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Using a prospective cohort study design, this study will enroll patients with clinical indications scheduled for invasive coronary angiography and coronary functional assessment. With a two-tiered framework of "pre-intervention baseline exposure assessment + procedural contamination quantification", it will be the first study to systematically evaluate the dose-response relationship between circulating microplastics and nanoplastics (MNPs) levels and coronary microvascular dysfunction (CMD). Through 2 years of follow-up, the effect of MNPs on the long-term prognosis of patients with CMD will also be assessed.

Multi-modal omics technologies including pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS), laser direct infrared spectroscopy (LDIR), and scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDS) will be applied for the qualitative and quantitative detection of MNPs. The index of microcirculatory resistance (IMR) and coronary flow reserve (CFR), measured via the invasive thermodilution method recommended by the European Society of Cardiology (ESC), will be used to define and evaluate CMD.

The core innovations of this protocol are twofold:

The key blood samples for exposure measurement are strictly collected before any medical procedures are performed after admission, to maximally eliminate the confounding bias from iatrogenic interference in baseline MNPs exposure quantification.

A three-level blank quality control system (procedural blank, environmental blank, device blank) is established to realize full-process monitoring and quantification of iatrogenic contamination.

The entire study design strictly adheres to current technical recommendations and industry consensus in clinical practice, and demonstrates high feasibility, reproducibility, and reliability.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

184

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

Patients older than 18 years old, with clinical indications for planned invasive coronary angiography and coronary functional assessment.

Beskrivelse

Inclusion Criteria:

  • Age ≥ 18;
  • Patients with clinical indications for undergoing invasive coronary angiography and coronary functional assessment (including fractional flow reserve [FFR], CFR, and IMR);
  • Voluntarily sign the written informed consent form.

Exclusion Criteria:

  • The surgeon (or attending physician) determines that the patient is not suitable for or cannot tolerate a coronary physiological examination;
  • Intraoperative coronary angiography reveals a stenosis of>90% in any non-left main coronary artery lumen or a stenosis of>50% in the left main coronary artery lumen;
  • Left ventricular ejection fraction <35% or cardiogenic shock or cardiac arrest;
  • Previous history of invasive procedures/treatments;
  • Active inflammatory diseases;
  • Connective tissue disease;
  • History of malignant tumors;
  • Expected lifespan <2 years;
  • Pregnancy or lactation;
  • Subjects who refuse to comply with the pollution control measures set in this study;
  • Currently participating in other interventional clinical trials.

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
Micro-nanoplastic Exposure and CVOT
According to the baseline circulating MNPs exposure level of the patients, participants will be categorized into the high-exposure group and low-exposure group using the median value as the cutoff point.
In this prospective cohort study, the investigators plan to perform a low-contamination protocol for the detection of circulating micro-nanoplastic particles in eligible subjects prior to the administration of invasive coronary angiography and concomitant coronary microvascular function assessment, so as to clarify the impact of micro-nanoplastic exposure status on coronary microvascular function and long-term prognosis.
Using a catheter to perform invasive coronary functional assessment, including flow fraction reserve(FFR), coronary flow reserve (CFR) and index of microcirculation resistance (IMR)

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Baseline Peripheral Circulatory MNPs Concentration(μg/g, particles/ml)
Tidsramme: baseline
Using multi-modal omics methodologies (Py-GC/MS, LDIR, and SEM-EDS), the investigators will evaluate the correlation between the total baseline peripheral circulatory concentration of MNPs and the baseline concentration of each specific particle type (reported as mass concentration in μg/g and particle count in particles/mL) in peripheral circulating blood and coronary sinus blood, and baseline coronary microvascular function
baseline
Coronary Microvascular Function
Tidsramme: baseline
Using invasive functional examinations (Coronary Flow Reverse, CFR and Index of Microcirculatory Resistance, IMR) to evaluate coronary microvascular function. Coronary Microvascular Dysfunction (CMD) is diagnosed by CFR<2.0 and IMR≥25.
baseline

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Baseline Intracoronary MNPs Concentration(μg/g, particles/ml)
Tidsramme: Baseline
Using multi-modal omics methodologies (Py-GC/MS, LDIR, and SEM-EDS), the investigators will evaluate the correlation between the total baseline intracoronary concentration of MNPs and the baseline concentration of each specific particle type (reported as mass concentration in μg/g and particle count in particles/mL) in both peripheral circulating blood and coronary sinus blood, and baseline coronary microvascular function.
Baseline
2 years Follow-up MACE
Tidsramme: 2 years
Major Adverse Cardiovascular Events (MACE) is defined as a composition endpoint including all-cause death, non-fatal stroke, non-fatal myocardial infarction, hospitalization due to unstable angina, or heart failure events
2 years

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Baseline Peripheral MNPs Subpopulations
Tidsramme: Baseline
Using multi-modal omics methodologies (Py-GC/MS, LDIR, SEM-EDS), the investigators will evaluate the correlations between CMD and multiple variables of MNPs in both peripheral circulating blood and coronary sinus blood, including MNP particle counts, morphological characteristics of each specific particle type (particle size, shape, polymer type, surface charge, etc.)
Baseline
Baseline Intracoronary MNPs Subpopulations
Tidsramme: Baseline
Using multi-modal omics methodologies (Py-GC/MS, LDIR, SEM-EDS), the investigators will evaluate the correlations between CMD and multiple variables of MNPs in both peripheral circulating blood and coronary sinus blood, including MNP particle counts, morphological characteristics of each specific particle type (particle size, shape, polymer type, surface charge, etc.)
Baseline
Baseline Circulatory Inflammation Biomarkers
Tidsramme: Baseline
Circulatory Inflammation Biomarkers includes interleukin-6 (IL-6), high-sensitivity C-reactive protein (hsCRP), procalcitonin (PCT), among other related molecular indicators.
Baseline

Samarbejdspartnere og efterforskere

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

Sponsor

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 (Anslået)

1. januar 2027

Primær færdiggørelse (Anslået)

31. december 2029

Studieafslutning (Anslået)

31. december 2029

Datoer for studieregistrering

Først indsendt

26. juli 2026

Først indsendt, der opfyldte QC-kriterier

31. juli 2026

Først opslået (Faktiske)

6. august 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

21. august 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

19. august 2026

Sidst verificeret

1. juli 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • MNPs-CMD

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .