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

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

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03406897
Acronym
POSEIDON
Enrollment
27
Registered
2018-01-23
Start date
2018-07-23
Completion date
2024-07-31
Last updated
2025-09-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Diabetes, Autoimmune, Diabetes Mellitus, Diabetes Mellitus, Type 1, Hypoglycemia

Brief summary

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.

Detailed description

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.

Interventions

DRUGCholecalciferol

Oral Administration

DRUGOmega 3 fatty acid

Oral Administration

Sponsors

Diabetes Research Institute Foundation
CollaboratorOTHER
Rodolfo Alejandro
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

The study is a two-arm, open label, randomized trial. All four groups will receive standard intensive diabetes treatment with insulin and dietary management. Group I: Fourteen (14) adults (18-65 years) of established T1D \> 6 months (\>180 days) and up to 10 years of T1D duration Group II: Fourteen (14) adults (18-65 years) of new-onset T1D diagnosed within last 6 months (≤ 180 days) Group III: Fourteen (14) children (6-17 years) of established T1D \> 6 months (\>180 days) and up to 10 years of T1D duration Group IV: Fourteen (14) children (6-17 years) of new-onset T1D diagnosed within last 6 months (≤ 180 days) Participants in each group will be randomly assigned in a 1:1 ratio to receive either one year of high dose Omega-3 fatty acids and Vitamin D combination (Arm A) or Vitamin D alone (Arm B). Both arms will receive Vitamin D supplementation.

Eligibility

Sex/Gender
ALL
Age
6 Years to 65 Years
Healthy volunteers
No

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.

Design outcomes

Primary

MeasureTime frameDescription
Change in MMTT (Mixed Meal Tolerance Test) 90 Min C-peptideBaseline and 1-Year VisitStimulated (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

MeasureTime frameDescription
Change in Hemoglobin A1c LevelBaseline and 1-Year VisitChange in HbA1c between baseline and 1-year
Change in Insulin RequirementsBaseline and 1-Year VisitDifference in insulin requirement at the 1-year visit compared to baseline measured in units/kg/day
Number of Adverse Events (AE)Through study completion, and average of one yearNumber of adverse events (AE) comparable to general diabetes population

Countries

United States

Participant flow

Participants by arm

ArmCount
Omega-3 and Vitamin D Combination
The treatment arm A includes Omega-3 Fatty Acids and Cholecalciferol (Vitamin D) supplement. Cholecalciferol: Oral Administration Omega 3 fatty acid: Oral Administration
12
Vitamin D Only
The treatment arm B (control group) will receive only Cholecalciferol (Vitamin D) supplement. Cholecalciferol: Oral Administration
15
Total27

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyLost to Follow-up12
Overall StudyPhysician Decision01
Overall StudyWithdrawal by Subject44

Baseline characteristics

CharacteristicOmega-3 and Vitamin D CombinationVitamin D OnlyTotal
Age, Categorical
<=18 years
10 Participants12 Participants22 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
2 Participants3 Participants5 Participants
Race/Ethnicity, Customized
Asian
1 Participants1 Participants2 Participants
Race/Ethnicity, Customized
White, Hispanic
5 Participants7 Participants12 Participants
Race/Ethnicity, Customized
White, Non-Hispanic
6 Participants7 Participants13 Participants
Region of Enrollment
United States
12 participants15 participants27 participants
Sex: Female, Male
Female
4 Participants7 Participants11 Participants
Sex: Female, Male
Male
8 Participants8 Participants16 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 120 / 15
other
Total, other adverse events
8 / 128 / 15
serious
Total, serious adverse events
0 / 122 / 15

Outcome results

Primary

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

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

Time frame: Baseline and 1-Year Visit

Population: Group A: 7/12 subjects completed 1year follow-up. Group B: 8/15 subjects completed 1year follow up.

ArmMeasureValue (MEDIAN)
Omega-3 and Vitamin D CombinationChange in MMTT (Mixed Meal Tolerance Test) 90 Min C-peptide-1.23 ng/mL
Vitamin D OnlyChange in MMTT (Mixed Meal Tolerance Test) 90 Min C-peptide-0.62 ng/mL
Secondary

Change in Hemoglobin A1c Level

Change in HbA1c between baseline and 1-year

Time frame: Baseline and 1-Year Visit

Population: Group A: 7/12 subjects completed 1year follow-up. Group B: 8/15 subjects completed 1year follow up.

ArmMeasureValue (MEDIAN)
Omega-3 and Vitamin D CombinationChange in Hemoglobin A1c Level0.00 percentage of HbA1c
Vitamin D OnlyChange in Hemoglobin A1c Level-0.55 percentage of HbA1c
Secondary

Change in Insulin Requirements

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

Time frame: Baseline and 1-Year Visit

Population: Group A: 7/12 subjects completed 1year follow-up. Group B: 8/15 subjects completed 1year follow up.

ArmMeasureValue (MEDIAN)
Omega-3 and Vitamin D CombinationChange in Insulin Requirements0.16 units/kg/day
Vitamin D OnlyChange in Insulin Requirements0.15 units/kg/day
Secondary

Number of Adverse Events (AE)

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

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

ArmMeasureValue (NUMBER)
Omega-3 and Vitamin D CombinationNumber of Adverse Events (AE)31 number of adverse events
Vitamin D OnlyNumber of Adverse Events (AE)28 number of adverse events

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026