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Completed

NCT Number: NCT03406897

Pilot Study of OMEGA-3 and Vitamin D in High-Dose in Type I Diabetic Patients

The investigator propose to test the safety and efficacy of a regimen that combines Omega-3 Fatty Acids and Vitamin D in a design that considers timing and duration of administration in relation to their effects and predicted synergies.

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Key information

Age range

6 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1 / Phase 2

Primary location

Diabetes Research Institute, University of Miami Miller School of Medicine

Miami, Florida, 33136, United States

About this study

These agents may afford promote sustained immune regulation, reduce inflammation, and provide support for the residual beta cell mass. This integrated therapeutic regimen addresses major pathogenic mechanisms in T1D (Type 1 Diabetes) and thus represents a rational and well supported approach to preserve insulin secretion in T1D (Type 1 Diabetes). This approach could halt the disease progress, preserve β-cell function and hopefully reduce dose of insulin required to manage T1D (Type 1 Diabetes). The investigator hypothesizes that Omega-3 Fatty Acids and Vitamin D, administered to patients with newly or established T1D (Type 1 Diabetes) and residual stimulated C-peptide secretion will be safe and may preserve insulin secretion.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

Patients must meet all of the following criteria to be eligible to participate in this study:

  • Subject must be able to understand and provide informed consent.
  • Males and females, 6-17 years for children and 18-65 years of age for adult group.
  • For new onset T1D - from onset to 6 months (180 days) post-diagnosis at the time of randomization.
  • For established T1D - At least 6 months and up to 10 years from the diagnosis at the time of randomization.
  • Affected by T1D, according to ADA standard criteria, and confirmed by positivity of at least one T1D-associated autoantibody, to GAD65, IA-2, ZnT8, or insulin autoantibody (if patient has been treated with insulin for less than 2 weeks).
  • T1D must be treated with insulin (except if participant is in Honeymoon period/phase).
  • Stimulated C-peptide peak level, at the baseline 1 visit MMTT, ≥ 0.2 ng/ml.
  • Female subjects of childbearing potential must have a negative pregnancy test upon study entry.
  • Adequate venous access to support study required blood draws.

Exclusion criteria

Patients must not meet any of the following criteria to be eligible to participate:

  • Inability or unwillingness of a participant to give written informed consent or comply with study protocol.
  • BMI>30 kg/m2.
  • Contra-indications to any of the drugs used in the trial (as per package insert, e.g., knowledge of hypersensitivity to drugs or its excipients).
  • Uncompensated heart failure, fluid overload, myocardial infarction or liver disease or severe impairment of a vital organ within the last 6 weeks before enrollment.
  • Any of the following laboratory findings indicating hemoglobin <10.0 g/dL; leukocytes <3,000/μL; neutrophils <1,500/μL; lymphocytes <800/μL; platelets <100,000/μL.
  • Any sign or diagnosis of significant chronic active infection (e.g., hepatitis, tuberculosis, EBV, or CMV), or screening laboratory evidence consistent with a significant chronic active infection (such as positive for HIV, IGRA test for TB, or hepatitis B-C).
  • Ongoing acute infections, e.g., acute respiratory tract, urinary tract, or gastrointestinal tract infections.
  • Ongoing or anticipated use of diabetes medications other than insulin.
  • Current or ongoing use of non-insulin pharmaceuticals that affect glycemic control within prior 7 days of screening.
  • Recent recipient of any licensed or investigational live attenuated vaccine(s) within 6 weeks of randomization.
  • Use of investigational drugs within 3 months of participation.
  • Concomitant therapy with immunosuppressive drugs, immunomodulators, or cytotoxic agents, or previous therapy less than 3 months from randomization.
  • History or diagnosis of malignancy, with the exception of a history of localized basal or squamous cell carcinoma.
  • History of gastroparesis or other severe gastrointestinal disease..
  • Presence of an allograft.
  • AST, ALT or Alkaline Phosphatase >2 times upper limit of normal or total bilirubin >1.5 times upper limit of normal.
  • History of mental illness deemed to be clinically unstable or any situation that, in the opinion of the investigator, would interfere with the participant's ability to comply with study requirements.
  • History of illicit drug or alcohol abuse.
  • Pregnancy or ongoing breastfeeding for women; unwillingness or inability of both females and males of childbearing age to use a reliable and effective form of contraception, for the entire duration of the study.
  • Past or current medical problems or findings from physical examination or laboratory testing that are not listed above, which, in the opinion of the investigator, may pose additional risks from participation in the study, may interfere with the participant's ability to comply with study requirements or that may impact the quality or interpretation of the data obtained from the study.

Treatment and study plan

Cholecalciferol

Drug

Oral Administration

Other names: Vitamin D

Omega 3 fatty acid

Drug

Oral Administration

Other names: Omega 3

Primary outcomes

  1. Change in MMTT (Mixed Meal Tolerance Test) 90 Min C-peptide

    Time frame: Baseline and 1-Year Visit

    Stimulated (90-minute sample of a MMTT) C-peptide at the 1-year visit greater or equal to baseline level measured by ng/mL.

    Change in 90-minute C-peptide between baseline and 1-year visit

Secondary outcomes

  1. Change in Hemoglobin A1c Level

    Time frame: Baseline and 1-Year Visit

    Change in HbA1c between baseline and 1-year

  2. Change in Insulin Requirements

    Time frame: Baseline and 1-Year Visit

    Difference in insulin requirement at the 1-year visit compared to baseline measured in units/kg/day

  3. Number of Adverse Events (AE)

    Time frame: Through study completion, and average of one year

    Number of adverse events (AE) comparable to general diabetes population

Sponsors and collaborators

Lead sponsor

Rodolfo Alejandro

Other

Collaborators

  • Diabetes Research Institute Foundation

Registry information

Official study title

A Pilot, Safety and Feasibility Trial of High-Dose Omega-3 Fatty Acids and High-Dose Cholecalciferol (Vitamin D) Supplementation in Type 1 Diabetes

Acronym: POSEIDON

Important dates

Study start
2018
Primary completion
2024
Study completion
2024
First posted
Jan 23, 2018
Registry last updated
Sep 17, 2025

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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