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NCT Number: NCT07697235

Impact of an Optimized Omega-3 Formulation on Inflammation and Endothelial Dysfunction in Pulmonary Arterial Hypertension

The objective of this research project is to evaluate the biological effects of long-chain omega-3 supplementation, administered in an optimized, high-purity formulation (EPA:DHA 6:1, >95% v/v), as an adjunct to standard-of-care treatment in patients with pulmonary arterial hypertension (PAH).

The expected results are confirmation in humans of our preliminary data, namely a beneficial effect on systemic inflammation and pulmonary endothelial dysfunction in PAH. If our hypothesis is confirmed, omega-3s could constitute a complementary nutritional approach to current PAH therapies, subsequently requiring validation through a larger-scale, randomized, controlled study.

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Key information

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Men or women between the ages of 18 and 75;
  • Idiopathic, hereditary, drug-induced, or anorexigen-induced PAH, or PAH associated with connective tissue disease;
  • Stable PAH treatment for at least 90 days;
  • Subjects capable of understanding the objectives and risks associated with the study and of providing dated and signed informed consent;
  • Subjects enrolled in a health insurance plan;
  • Subjects who have signed an informed consent form;
  • For women of childbearing age: negative pregnancy test at the screening/inclusion visit; effective contraception* throughout the study (recommended in PAH)
  • Effective and accepted methods of contraception during the study (subject, partner): oral contraceptive pill, intrauterine device (IUD), condom (male or female). Patients who practice total abstinence do not need to use contraception.

Exclusion criteria

  • Patients treated with Omacor®;
  • Daily consumption of fish oil or fish oil-based dietary supplements (omega-3);
  • Hypersensitivity or allergy to fish, shellfish, peanuts, soy, corn oil, or coconut oil;
  • Anticoagulant therapy at therapeutic doses;
  • Cardiac decompensation within the month prior to enrollment;
  • Other causes of pulmonary hypertension (groups 2, 3, 4, or 5);
  • Persistent atrial fibrillation (AF);
  • Left ventricular ejection fraction < 45% on echocardiography;
  • Recent episode of pulmonary embolism, within the past 6 months;
  • Myocardial infarction or placement of a coronary stent within the month prior to enrollment;
  • eGFR < 30 mL/min/1.73 m²;
  • Malignant disease (not considered in remission);
  • Severe sepsis;
  • Participation in another clinical trial within the previous 3 months;
  • Subjects under legal guardianship, conservatorship, or curatorship

Treatment and study plan

Omega 3

Dietary Supplement

The investigational product is an oral nutritional supplement consisting of an optimized omega-3 fatty acid formulation derived from fish oil. Each hard capsule (hydroxypropyl methylcellulose, HPMC) contains 667 mg of combined eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), with a stoichiometric EPA:DHA ratio of 6:1.

The product is provided as transparent hard capsules intended for oral administration.

Dosage and administration:

Participants will receive a total of four capsules per day, administered as two capsules in the morning and two capsules in the evening, taken with meals to improve gastrointestinal tolerance and absorption. The total daily dose of omega-3 fatty acids is approximately 2.7 g.

Treatment duration:

The intervention will be administered for a total duration of 12 weeks.

Primary outcomes

  1. Change from baseline in M1/M2 macrophage polarization markers in peripheral blood mononuclear cells (PBMCs)

    Time frame: From baseline to end of treatment (12 weeks)

    Change from baseline to Week 12 in the expression of M1 (CD86, CD80, iNOS) and M2 (CD163, CD206, Arg1) macrophage polarization markers in PBMCs measured by RT-PCR and confirmed by Western blot.

Study contacts

Contact information is provided by the study sponsor or research team.

Sarah HUSTACHE

CONTACT

[email protected]

+33 3 88 11 54 15 ext. 00 33

Sponsors and collaborators

Lead sponsor

University Hospital, Strasbourg, France

Other

Registry information

Acronym: OMEGA-PAH

Important dates

Study start
2026
Primary completion
2029
Study completion
2030
First posted
Jul 13, 2026
Registry last updated
Jul 13, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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