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Aortic Aneurysm and DissectionMITAORTANCT05434481

MITAORTA - Role of Mitochondrial Dynamic in Aneurysm and Dissection of Ascending Thoracic Aorta

A study testing Mitochondrial dynamic analysis in the aorta samples and metabolomic profiling in the aortic diseases in people with Aortic Aneurysm and Dissection, run by University Hospital, Angers at 1 site in France.

Unknown status

Status not confirmed. The sponsor has not verified this record for over two years, so it may be out of date.

Official record
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Trial summary

The main objective is to compare the mitochondrial dynamic between patients operated for aneurysm of ascending aorta or type A aortic dissection (AAD) or control group Read more about this study

Who is it for?
Ages 18 to 90 yearsHealthy volunteers can take part
Conditions the study is for
Aortic Aneurysm and Dissection
What is being tested?
Mitochondrial dynamic analysis in the aorta samples and metabolomic profiling in the aortic diseases
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
60 participants
Where
1 siteFrance
Study dates
7 Sep 2022to 23 Oct 2024
Phase
Interventional
Are there results?
None posted in the registry

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 90 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Aneurysm aortic group: patients treated for an aneurysm of the ascending thoracic aorta with surgical indication according to the ESC guidelines (2014).
  • Aortic dissection group: patients treated for type A acute aortic dissection or intramural hematoma of the ascending thoracic aorta in emergency.
  • Control group: patients operated for aortic valve replacement (little aortic sample before closing aortotomy) or coronary artery bypass grafting which the use of a saphenous graft and the performance of a proximal anastomosis on the ascending aorta is planned

Who cannot join

  • Patients under 18 years old
  • Other acute aortic syndromes (penetrating ulcers, iatrogenic or traumatic dissections)
  • Patients treated for aortic valve replacement in the context of infective endocarditis
  • Patients treated for emergency aortic valve replacement or coronary bypass surgery**
  • Pregnant, parturient and breastfeeding women
  • Patients protected by an administrative or judicial measure (curatorship, guardianship)
Show all 10Show fewer
  • Patients receiving psychiatric care under duress
  • Adults subject to a legal protection measure.
  • Patients whose the samples planned for the study could not be taken;
  • Patients in the control group whose tissue sampling will not be performed.

Trial locations and contacts

1 site in 1 country.

France1 site
  • Olivier FOUQUET

    Angers

Other trials in France

About this study

The main objective is to compare the mitochondrial dynamic between patients operated for aneurysm of ascending aorta or type A aortic dissection (AAD) or control group

Read the detailed description

In an aortic aneurysm process, the alteration of the extracellular matrix (ECM) as well as the apoptosis of the smooth muscle cells are due to inflammatory phenomena and oxydative stress, involving mitochondria which has a key place within cells.

Mitochondrial fusion and fission constitute mitochondrial dynamic and are involved in the mechanisms described above.

The alteration of mitochondrial dynamics has been demonstrated in many pathologies, in particular neurological, cancer and cardiovascular disease and generally occurs in favor of fission.

In a mouse model (FASEB J, 2021, Robert P ), the role of mitochondrial fusion has been demostrated as a protective factor against hypertension in resistance arteries and a deletion of OPA1 (optic Atrophy 1) fusion protein may lead to aneurysm until aortic dissection. The results of this experimental study suggest a role of the alteration of mitochondrial dynamic in the development of aneurysm and aortic dissection.

Being tested
Mitochondrial dynamic analysis in the aorta samples and metabolomic profiling in the aortic diseases
Keywords
extracellular matrix, cell survival, oxydative stress, mitochondrial fusion, metabolomic profiling of aortic aneurym, metabolomic profilng of aortic dissection
Medical subject headings
Aortic Dissection

What participants receive

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

  • Mitochondrial dynamic analysis in the aorta samples and metabolomic profiling in the aortic diseasesOther

    • For each patient: a segment of aorta will be sampled and cutted into 4 parts
    • 1 fragment placed in a Falcon tube containing DMEM (Dulbecco's Modified Eagle Medium, Thermo Fisher®), temporarily stored at + 4°C, for primary culture of smooth muscle cells will allow analysis of the mitochondrial network.
    • 1 fragment placed in a Falcon tube containing Allprotect Tissue Reagent (QIAGEN®), stored at -80°C for gene (RT-PCR) and protein (Western Blot) analysis.
    • 2 fragments each placed in dry cryotube stored at - 80°C will be used for metabolomic analysis.
    • For each patient, 2 arterial blood samples will be collected before general anaesthesia
    • One tube of whole blood stored at -80°C for metabolomic analysis.
    • One tube of blood stored at -80°C for plasma cytokines
Study groups in NCT05434481
Study groupRoleWhat they receive
Aneurysm groupActive comparatorPatients operated for aneurysm of the ascending aorta according the guidelines on the diagnosis and treatment of aortic diseases (European Society of Cardiology - 2014).
Receives: Other: Mitochondrial dynamic analysis in the aorta samples and metabolomic profiling in the aortic diseases
Type A aortic dissection groupActive comparatorPatients operated for type A aortic dissection according the guidelines on the diagnosis and treatment of aortic diseases (European Society of Cardiology - 2014).
Receives: Other: Mitochondrial dynamic analysis in the aorta samples and metabolomic profiling in the aortic diseases
Control groupSham comparatorPatients without aortic aneurysm or aortic dissection operated for aortic valve replacement (AVR) and/or coronary artery bypass with a saphenous vein graft for proximal aortic anastomosis to collect the aortic sample. For patients operated for AVR, an aortic sample will be collected before closing the aorta.
Receives: Other: Mitochondrial dynamic analysis in the aorta samples and metabolomic profiling in the aortic diseases

What is being measured

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

  1. Level of tissue expression of the genes and coding for the proteins (Optic Atrophy 1) OPA1

    Level expression of, (Optic Atrophy 1) OPA1 by RT-qPCR

    Measured: 1 month

  2. Level of tissue expression of the genes and coding for the proteins MFN1 (Mitofusin 1)

    Level expression of MFN1 (Mitofusin 1) by RT-qPCR

    Measured: 1 month

  3. Level of tissue expression of the genes and coding for the proteins MFN2 (Mitofusin 2)

    Level expression of MFN2 (Mitofusin 2) by RT-qPCR

    Measured: 1 month

  4. Level of tissue expression of the genes and coding for the proteins Fis1

    Level expression of Fis1 by RT-qPCR

    Measured: 1 month

  5. Level of tissue expression of the genes and coding for the proteins Drp1

    Level expression of Drp1 by RT-qPCR

    Measured: 1 month

  6. Level of tissue expression of the genes and coding for the proteins Nfr1

    Level expression of Nfr1 by RT-qPCR

    Measured: 1 month

  7. Level of tissue expression of the genes and coding for the proteins Tfam

    Level expression of Tfam by RT-qPCR

    Measured: 1 month

  8. Level of tissue expression of the genes and coding for the proteins PGC1⍺

    Level expression of PGC1⍺ by RT-qPCR

    Measured: 1 month

  9. Analysis of mitochondrial network

    To analyze the mitochondrial network, vascular smooth muscle cells will be extracted from the wall of aorta samples and seeded in Petri dish. When 80% confluence is obtained, cells will be incubated with a green fluorescent marker (Mitotacker Green Probes) and 3D fluorescence microscopy will be used. Analysis of mitochondrial network will be done after characterization of mitochondrial shapes and distribution in the different aorta samples.

    Measured: 1 month

Secondary outcomes (16)
  1. Protein of remodelling and constitution of extracellular matrix: Metalloprotease MMp2

    Level expression of Metalloprotease MMp2 by western blot

    Measured: 1 month

  2. Proteins of remodelling and constitution of extracellular matrix: Timp 1/2

    Level expression of Timp 1/2 by western blot

    Measured: 1 month

  3. Proteins of remodelling and constitution of extracellular matrix: Collagene I/III

    Level expression of Collagene I/III by western blot

    Measured: 1 month.

  4. Protein of remodelling and constitution of extracellular matrix: Elastine

    Level expression of Elastine by western blot

    Measured: 1 month

  5. Proteins of survival cell: Bcl2/Bax

    Level expression of Bcl2/Bax by western blot

    Measured: 1 month

  6. Proteins of survival cell: Cytochrome C

    Level expression of Cytochrome C by western blot

    Measured: 1 month

  7. Proteins of oxydative stress: NADPH

    Level expression of NADPH by western blot

    Measured: 1 month

  8. Proteins of oxydative stress: OxyD

    Level expression of OxyD by western blot

    Measured: 1 month

  9. Proteins of oxydative stress: Sod 1/2

    Level expression of Sod 1/2 by western blot

    Measured: 1 month

  10. Proteins of Smooth Muscle Cell reactivity: Myh11

    Level expression of Myh11 by western blot

    Measured: 1 month

  11. Proteins of Smooth Muscle Cell reactivity: Acta 2

    Level expression of Acta 2 by western blot

    Measured: 1 month

  12. Proteins of Smooth Muscle Cell reactivity: MLC20

    Level expression of MLC20 by western blot

    Measured: 1 month

  13. Proteins of Smooth Muscle Cell reactivity: Rock1

    Level expression of Rock1 by western blot

    Measured: 1 month

  14. Proteins of Smooth Muscle Cell reactivity: Rhoa

    Level expression of Rhoa by western blot

    Measured: 1 month

  15. Analysis of Plasma Metabolomes

    154 metabolites will be measured in plasma samples. Plasma data blocks will be submitted to multiblock orthogonal component analysis (MOCA) after normalizing concentrations of plasma samples by their weights.

    Measured: 2 years

  16. Analysis of Aorta Metabolomes

    136 metabolites will be measured in plasma samples. Plasma data blocks will be submitted to multiblock orthogonal component analysis (MOCA) after normalizing concentrations of aorta samples by their weights.

    Measured: 2 years

Timeline

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

  1. First posted28 Jun 2022
  2. Study start7 Sep 2022
  3. Primary completion23 Oct 2023
  4. Study completion23 Oct 2024 (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
Other
Allocation
Non-randomised
Intervention model
Parallel groups
Model description
Aneurysm and Dissection of Ascending Thoracic Aorta
Masking
None (open label)
Enrolment
60 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05434481
Sponsor's protocol ID
2022-A00719-34
Acronym
MITAORTA
Status last verified
Jun 2024
First submitted
3 Jun 2022
Last updated
11 Jun 2024
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: The data will be collected in a coded manner: first letter of the surname, first letter of the patient's first name, serial number of inclusion in the center by the physicians investigating the study in the electronic observation notebook managed by the DRCI of University Hospital of Angers

Publications

  • Trabado S, Al-Salameh A, Croixmarie V, Masson P, Corruble E, Feve B, Colle R, Ripoll L, Walther B, Boursier-Neyret C, Werner E, Becquemont L, Chanson P. The human plasma-metabolome: Reference values in 800 French healthy volunteers; impact of cholesterol, gender and age. PLoS One. 2017 Mar 9;12(3):e0173615. doi: 10.1371/journal.pone.0173615. eCollection 2017.

    PubMed 28278231
  • Robert P, Nguyen PMC, Richard A, Grenier C, Chevrollier A, Munier M, Grimaud L, Proux C, Champin T, Lelievre E, Sarzi E, Vessieres E, Henni S, Prunier D, Reynier P, Lenaers G, Fassot C, Henrion D, Loufrani L. Protective role of the mitochondrial fusion protein OPA1 in hypertension. FASEB J. 2021 Jul;35(7):e21678. doi: 10.1096/fj.202000238RRR.

    PubMed 34133045
  • Toda M, Yamamoto K, Shimizu N, Obi S, Kumagaya S, Igarashi T, Kamiya A, Ando J. Differential gene responses in endothelial cells exposed to a combination of shear stress and cyclic stretch. J Biotechnol. 2008 Jan 20;133(2):239-44. doi: 10.1016/j.jbiotec.2007.08.009. Epub 2007 Aug 9.

    PubMed 17850909
  • Archer SL. Mitochondrial dynamics--mitochondrial fission and fusion in human diseases. N Engl J Med. 2013 Dec 5;369(23):2236-51. doi: 10.1056/NEJMra1215233. No abstract available.

    PubMed 24304053
  • Piquereau J, Caffin F, Novotova M, Prola A, Garnier A, Mateo P, Fortin D, Huynh le H, Nicolas V, Alavi MV, Brenner C, Ventura-Clapier R, Veksler V, Joubert F. Down-regulation of OPA1 alters mouse mitochondrial morphology, PTP function, and cardiac adaptation to pressure overload. Cardiovasc Res. 2012 Jun 1;94(3):408-17. doi: 10.1093/cvr/cvs117. Epub 2012 Mar 8.

    PubMed 22406748
  • Le Page S, Niro M, Fauconnier J, Cellier L, Tamareille S, Gharib A, Chevrollier A, Loufrani L, Grenier C, Kamel R, Sarzi E, Lacampagne A, Ovize M, Henrion D, Reynier P, Lenaers G, Mirebeau-Prunier D, Prunier F. Increase in Cardiac Ischemia-Reperfusion Injuries in Opa1+/- Mouse Model. PLoS One. 2016 Oct 10;11(10):e0164066. doi: 10.1371/journal.pone.0164066. eCollection 2016.

    PubMed 27723783

Questions about this trial

What is this clinical trial studying?

A study testing Mitochondrial dynamic analysis in the aorta samples and metabolomic profiling in the aortic diseases in people with Aortic Aneurysm and Dissection, run by University Hospital, Angers at 1 site in France.

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 10 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: status not confirmed, as of the sponsor's last update on 11 Jun 2024. 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 France. 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. Some participants in this study may receive a placebo. 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?

Results are not available in the source record.

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

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Level of tissue expression of the genes and coding for the proteins (Optic Atrophy 1) OPA1 (time frame: 1 month). The study lists 9 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 NCT05434481, which also lists 6 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 11 Jun 2024.

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