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Ultrastructural Characteristics of Mitochondria in Cardiomyocytes in Heart Failure

NCT05770349 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 45

Last updated 2026-04-02

No results posted yet for this study

Summary

According to modern concepts, mitochondrial dysfunction may be the fundamental basis for the development and progression of CHF, including in patients undergoing myocardial revascularization. The processes of mitochondrial fusion, division and mitophagy are aimed at maintaining cellular homeostasis. A change in the balance of these processes can lead to the accumulation of damaged organelles with impaired functions. In patients with CHF, dysfunctional mitochondria are characterized by size dispersion, crist disorganization, and localization changes relative to myofibrils.

At the same time, the topic of the influence of mitochondrial dysfunction on the prognosis and clinical course of CHF remains debatable today. Direct study of the structural and functional features of mitochondria in human cardiomyocytes is an extremely difficult task, and therefore, such studies are carried out extremely rarely and on very limited cohorts. In the planned study, due to the long time of the study material recruitment, the ultrastructure of mitochondria in a large cohort of patients, ranging from 45 to 60 people, will be studied.

The aim of this study is to study the association of mitochondrial dysfunction with the clinical course and outcomes of CHF of ischemic etiology, as well as to assess the degree of compliance of indirect criteria of mitochondrial dysfunction with direct ultrastructural characteristics of mitochondria in cardiomyocytes.

This single-center prospective cohort study will involve 45-60 patients. The patients will have biopsy samples taken from the right auricle, as well as blood collection and preservation and its derivatives. Electron microscopy of myocardial samples will be performed to assess the ultrastructure of mitochondria of cardiomyocytes. The results of a direct study of mitochondria will be compared with indirect signs of mitochondrial dysfunction: the registration of the phenomenon of increased leaching of radiopharmaceuticals from the myocardium, an increase in the number of copies of mitochondrial DNA and the concentration of cytochrome C in the blood, the affiliation of mitochondrial DNA to haplogroup K. The results obtained in each of the research tasks will have high scientific significance and publication potential.

Conditions

Interventions

PROCEDURE

coronary artery bypass grafting

Coronary artery bypass grafting

Sponsors & Collaborators

  • Russian Science Foundation

    collaborator OTHER

  • Tomsk National Research Medical Center of the Russian Academy of Sciences

    lead OTHER

Principal Investigators

  • Alla A Garganeeva, Ph.D. · Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-03-31
Primary Completion
2026-11-30
Completion
2027-11-30

Countries

  • Russia

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05770349 on ClinicalTrials.gov