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CompletedNCT05756062Updated Mar 6, 2023

Supplementation With a Highly-Concentrated Docosahexaenoic Acid (DHA) Triglyceride in Patients With Keratoconus

An interventional study of Highly-concentrated DHA triglyceride (Tridocosahexanoin-AOX 70%) in Keratoconus, sponsored by Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana. Completed at 1 site in Spain. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2023-03-06.

Sponsored by Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Registered 4 years after the study started (first participant enrolled Feb 2019, registered Feb 2023).
Phase
Not applicable
Study type
Interventional
Enrollment
34
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The goal of this randomized controlled preliminary study is to assess the effect of daily supplementation with a nutraceutical formulation of a highly-concentrated DHA triglyceride plus minerals on ophthalmological parameters and biomarkers of oxidative stress and inflammation in blood samples of patients with keratoconus.The main questions it aims to answer are:

  • Improvements in ophthalmological parameters.
  • Increase in antioxidant capacity, decrease in inflammatory status, and changes in lipidomic biomarkers.

Participants are patients with keratoconus who will be given the nutraceutical supplementation for 3 months.

If there is a comparison group: Researchers will compare patients with keratoconus not given the nutraceutical formulation to see differences in the study variables

Read the detailed description

Among omega-3 polyunsaturated fatty acids (PUFAs), docosahexaenoic acid (DHA, C22:6-n3), a critical component of cell membrane phospholipids, exerts pleiotropic effects at both central and peripheral levels with health benefits in many aspects of neuronal, immune, cognitive, and cardiovascular functions Clinical studies of dietary sup-plementation with a highly-concentrated DHA triglyceride have shown consistent an-ti-inflammatory, antioxidant, antiangiogenic, and antiproliferative effects targeting pathophysiological pathways involved in different eye diseases, including diabetic retinopathy and macular edema, ocular surface disorders, meibomian gland dysfuncton, and pseudoexfoliative glaucoma.

Based on this experience, it was considered of interest to explore the antioxidant and anti-inflammatory potential of a highly-concentrated DHA triglyceride supplement in patients with keratoconus. For this purpose, a prospective preliminary study was designed to assess the effects of 3-month DHA nutritional supplementation on clinical variables, and inflammatory and oxidative stress biomarkers of patients with early and moderate keratoconus.

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Conditions studied

  • Keratoconus

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03

In context

Keratoconus

307 studies on the registry are indexed under Keratoconus; 56 are open to participants now.

This study's enrollment of 34 is below the median of 40 across 203 interventional studies indexed under Keratoconus.

Browse Keratoconus studies →

Lead sponsor

Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana is the lead sponsor of 43 studies on the registry; 5 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Diagnosis of keratoconus stages I to III according to the Amsler-Krumeich classification
  • Non-contact lens wearers
  • No history of previous corneal surgery
  • Capacity to volunteer and willing and able to follow the study protocol

Exclusion criteria

Exclusion Criteria:

  • Advanced keratoconus (stage IV of the Amsler-Krumeich classification
  • Other ectasias (e.g. iatrogenic secondary to ocular surface surgery with excimer laser, radial keratotomy, traumatic corneal ectasia, etc.)
  • Eyelid alterations
  • Previous ocular surgery
  • Any ocular or systemic condition that may affect the interpretation of results
  • Glaucoma or ocular hypertension
  • History of ocular trauma, infection or inflammation
  • Current treatment with topical or anti-inflammatory drugs
  • Use of nutritional supplements including omega-3 fatty acids, vitamins and minerals (unless a washout period of 1 month had been established)
  • Hypersensitivity to fish proteins
  • Pregnant women
  • Refusal to sign the written informed consent
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
34 participants (actual)

Study arms

  • Experimental
    DHA group

    Supplementation with a highly-concentrated docosahexaenoic acid (DHA) triglyceride (1000 g/day) for 3 months

    Dietary Supplement: Highly-concentrated DHA triglyceride (Tridocosahexanoin-AOX 70%)

  • No intervention
    Control group

    Routine care

Interventions

  • Dietary supplementHighly-concentrated DHA triglyceride (Tridocosahexanoin-AOX 70%)

    Daily administration of 2 capsules of the study product (1000 mg DHA triglyceride) for 3 months

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What researchers measure

Primary outcomes

  1. Corneal topography

    Changes of ophthalmological parameters

    Time frame: Baseline and after 3 months of supplementation (end of study)

  2. Antioxidant variables

    Changes in plasma total antioxidant capacity (TAC), malondialdehyde (MDA) and glutathione (GSH), and GSH/GSSH ratio

    Time frame: Baseline and after 3 months of supplementation (end of study)

  3. Anti-inflammatory variables

    cytokine levels IL-1beta, IL-4, IL-6, IL-10, IL-18, TNFalpha, VEGF-A

    Time frame: Baseline and after 3 months of supplementation (end of study)

Secondary outcomes

  1. Lipidomic variables

    Serum levels of DHA, arachidonic acid (ARA), n-6 PUFA/n-3 PUFA, omega-3 index

    Time frame: Baseline and after 3 months of supplementation (end of study)

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Study locations

1 site
  • FISABIO Medical Ophthalmology (FOM)
    Valencia, 46015, Spain
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 6, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT05756062
Lead sponsor
Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana
Responsible party
Cristina Peris (Head Unit of Cornea and Anterior Eye Diseases, FISABIO Medical Ophthalmology (FOM), Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana) — Principal investigator
First posted
Mar 6, 2023
Start date
Feb 1, 2019
Primary completion
Jan 10, 2022
Completion
Jan 10, 2022
Last update
Mar 6, 2023

Study contacts

Cristina Peris-Martinez, MD
principal investigator · FISABIO Medical Ophthalmology (FOM)

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2023. You cannot join it, but the record below documents what was studied.

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