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- Essai clinique NCT07730385
Fish Oil and HDL Function in Patients on Maintenance Hemodialysis (EFFLUX-HD)
Mechanistic Effects of n-3 Polyunsaturated Fatty Acid Supplementation on HDL Function in Patients Receiving Maintenance Hemodialysis (EFFLUX-HD): Study Protocol for a Randomized, Open-label, Crossover Trial
Patients who receive maintenance hemodialysis have a very high risk of cardiovascular disease, and standard cholesterol-lowering treatments such as statins have not been shown to reduce cardiovascular events in this group. A recent clinical trial (PISCES) found that high-dose omega-3 fatty acids (fish oil) reduced cardiovascular events in hemodialysis patients, but the reason for this benefit is not understood.
One possible explanation is that, in kidney failure, high-density lipoprotein (HDL) no longer works normally. This study investigates whether omega-3 fatty acid supplementation improves the function of HDL in people on maintenance hemodialysis.
Forty adults on maintenance hemodialysis will take part. Each participant receives fish oil (4 g per day) for 8 weeks and also has an 8-week period without supplementation; participants are randomly assigned to the order of these two periods (crossover design), for a total of 16 weeks each. The main measure is cholesterol efflux capacity, a laboratory test of how well HDL removes cholesterol from cells. The study also examines other markers of HDL quality.
This is an exploratory, mechanistic study. Its aim is to determine whether omega-3 fatty acids change HDL function and to inform the design of larger future trials.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Patients receiving maintenance hemodialysis (HD) experience exceptionally high cardiovascular (CV) mortality that is not adequately addressed by conventional lipid-lowering strategies. The PISCES trial demonstrated that high-dose n-3 polyunsaturated fatty acid (n-3 PUFA) supplementation reduces CV events in HD patients, yet the underlying mechanism remains unknown.
In the uremic milieu, HDL undergoes qualitative changes-including enrichment with serum amyloid A (SAA), loss of anti-oxidative capacity, and impaired cholesterol efflux capacity (CEC)-that render it dysfunctional and may contribute to CV risk independently of HDL cholesterol concentration. Evidence from non-dialysis populations suggests that n-3 PUFA can favorably modify the HDL proteome and improve HDL function. The investigators hypothesize that n-3 PUFA supplementation favorably modulates HDL function in HD patients, which could help explain the CV benefit observed in PISCES.
EFFLUX-HD is a single-center, prospective, randomized, open-label, crossover, exploratory mechanistic study conducted at the Chronic Hemodialysis Unit of the Vienna General Hospital (Medical University of Vienna). Forty adults on maintenance HD are randomized 1:1 to one of two treatment sequences that differ in the order of an 8-week n-3 PUFA supplementation period (4 g/day fish oil; approximately 1.6 g EPA and 0.8 g DHA, matching the PISCES dose) and an 8-week off-treatment period, without a formal washout, for a total of 16 weeks per participant. The crossover design allows each participant to serve as their own control, removing the substantial between-participant variability in HDL functional measures.
Outcomes are analyzed using linear mixed-effects models. No formal sample-size calculation was performed given the exploratory, mechanistic design; the target of 40 participants is intended to estimate within-participant effects and the variability of HDL functional parameters to inform future confirmatory trials. The study was approved by the Ethics Committee of the Medical University of Vienna and is conducted in accordance with the Declaration of Helsinki and the principles of Good Clinical Practice.
Type d'étude
Inscription (Estimé)
Phase
- N'est pas applicable
Contacts et emplacements
Coordonnées de l'étude
- Nom: Janosch Niknam-Saeidi, MD
- E-mail: janosch.niknamsaeidi@meduniwien.ac.at
Sauvegarde des contacts de l'étude
- Nom: Manfred Hecking, MD, PhD
- E-mail: manfred.hecking@meduniwien.ac.at
Lieux d'étude
-
-
State of Vienna
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Vienna, State of Vienna, L'Autriche, 1090
- Chronic Hemodialysis Unit, Division of Nephrology and Dialysis, Department of Medicine III, Medical University of Vienna
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Contact:
- Janosch Niknam-Saeidi, MD
- E-mail: janosch.niknamsaeidi@meduniwien.ac.at
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Sous-enquêteur:
- Janosch Niknam-Saeidi, MD
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
La description
Inclusion Criteria:
- age ≥ 18 years
- receiving maintenance in-center hemodialysis
- able to provide written informed consent
- clinically stable condition (no hospitalization within 4 weeks prior to baseline)
Exclusion Criteria:
- inability or unwillingness to provide informed consent
- known hypersensitivity or intolerance to fish oil or n-3 PUFA-containing products
- use of n-3 PUFA supplements at baseline or within the preceding 8 weeks
- pregnancy
- acute infection, hospitalization or major inflammatory condition at the time of baseline assessment
- any condition that, in the investigator's opinion, would make participation unsafe or interfere with study participation or data interpretation
- inherited lipid metabolism disorders
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: La prévention
- Répartition: Randomisé
- Modèle interventionnel: Affectation croisée
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Expérimental: Group A: n-3 PUFA then off-treatment
Participants receive n-3 PUFA supplementation (4 g/day fish oil) for 8 weeks, followed by an 8-week off-treatment period.
|
4g/day fish oil (four 1 g capsules) providing approximately 1.6 g EPA and 0.8 g DHA, taken for 8 weeks, matching the PISCES dose
|
|
Expérimental: Group B: off-treatment then n-3 PUFA
Participants undergo an 8-week off-treatment period, followed by 8 weeks of n-3 PUFA supplementation (4 g/day fish oil).
|
4g/day fish oil (four 1 g capsules) providing approximately 1.6 g EPA and 0.8 g DHA, taken for 8 weeks, matching the PISCES dose
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Cholesterol Efflux Capacity (CEC)
Délai: Weeks 1, 8, and 16
|
Cholesterol efflux capacity of apolipoprotein B-depleted serum, measured with a cell-based fluorescent assay and reported as percentage cholesterol efflux (%).
|
Weeks 1, 8, and 16
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Serum Amyloid A (SAA)
Délai: Weeks 1, 8, and 16
|
Serum amyloid A concentration in serum, obtained from routine clinical laboratory measurement and reported in mg/L.
|
Weeks 1, 8, and 16
|
|
Biologically Effective HDL
Délai: Weeks 1, 8, and 16
|
Biologically effective HDL, calculated from concomitantly measured HDL cholesterol and serum amyloid A concentrations and reported in mg/dL.
|
Weeks 1, 8, and 16
|
Collaborateurs et enquêteurs
Parrainer
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
- Maladies urogénitales
- Processus pathologiques
- Maladies urogénitales masculines
- Maladies rénales
- Maladies urologiques
- Maladies urogénitales féminines
- Maladies urogénitales féminines et complications de la grossesse
- Maladie chronique
- Attributs de la maladie
- Insuffisance rénale
- Conditions pathologiques, signes et symptômes
- Maladies cardiovasculaires
- Insuffisance rénale chronique
- Acides gras
- Lipides
- Acides gras, insaturés
- Huiles
- Graisses alimentaires
- Graisses
- Graisses alimentaires, insaturés
- Huiles de poisson
- Acides gras, oméga-3
Autres numéros d'identification d'étude
- EK Nr: 1072/202 (EFFLUX-HD)
Plan pour les données individuelles des participants (IPD)
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Informations sur les médicaments et les dispositifs, documents d'étude
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