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Influence of high dose vitamin D substitution onto the immune system in patients with type 1 diabetes mellitus or Addison´s disease (ViDDA1)

Influence of high dose vitamin D substitution on humoral immunity and lymphocyte function in patients with type 1 diabetes mellitus or Addison´s disease (ViDDA1) - EMR200109-619

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2010-022677-34-DE
Enrollment
Unknown
Registered
2011-06-01
Start date
2011-09-07
Completion date
Unknown
Last updated
2014-02-03

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

Conditions

Type 1 diabetes mellitus or Addison´s disease (ViDDA1) MedDRA version: 14.1 Level: HLGT Classification code 10001353 Term: Adrenal gland disorders System Organ Class: 10014698 - Endocrine disorders MedDRA version: 14.1 Level: HLT Classification code 10012602 Term: Diabetes mellitus (incl subtypes) System Organ Class: 10014698 - Endocrine disorders

Interventions

Trade Name: Vigantol Oil Product Name: Colecalciferol Pharmaceutical Form: Oral drops INN or Proposed INN: Colecalciferol CAS Number: 67 97 0 Other descriptive name: Vigantol Concentration unit: mg/ml

Sponsors

Dekan des Fachbereichs Humanmedizin
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: • Written informed consent before any study-related activities • Ambulatory subject >18 and =65 years) no F.1.3.1 Number of subjects for this age range

Exclusion criteria

Exclusion criteria: • Known hypersensitivity to colecalciferol, or to any other excipient or to Miglyol Oil • Active, consuming diseases (cancer, HIV) • Renal failure (creatinine > 1,5mg/dl, GFR = 80) • Malfunction of renal calcium and/or phosphate excretion • Liver disease (AST, ALT > 1.5x ULN) • Psychiatric diseases • Hypercalcaemia (serum calcium > 2,6 mmol/l) or hypercalciuria (urine calcium to creatinine ratio > 1 mmol/l x (mmol/l) -1 • Nephrolyths (current or in patient’s history) • Sarcoidosis (current or in patient’s history) • Treatment with phenytoin, barbiturates, glycosides, benzothiazidine containing drugs, metabolites or analogues of bisphosphonates, calcium mimetics or vitamin D at present or in the last 6 weeks. • Any significant disease, which, in the Investigator’s opinion, would have excluded the subject from the study • Pregnancy or lactation • Women of child-bearing potential not applying adequate contraceptive protection. • Immobilised patients • Pseudohypoparathyreodism

Design outcomes

Primary

MeasureTime frame
Main Objective: Difference in vitamin D levels, T lymphocyte subsets, T regulatory lymphocytes, dendritic cells and NK lymphocytes after 3 months of treatment between Vigantol Oil and Placebo Oil.;Secondary Objective: Difference in lymphocyte cytokine status (IL-1, IL-4, IL-10, TNFa), pharmacogenomics of vitamin D variables and vitamin D-dependent immune signatures after 3 months of treatment between Vigantol Oil and Placebo Oil.;Primary end point(s): The sample size calculation is based on the assumption that a variance of 4 and a difference of 0,5 for the quantification of the T lymphocyte subsets and dendritic cells and/or c) on the genes´ mRNA expression can be detected with a power of 80% and an alpha of 0.05.;Timepoint(s) of evaluation of this end point: After 3 months of study treatment in each arm

Secondary

MeasureTime frame
Secondary end point(s): none;Timepoint(s) of evaluation of this end point: none

Countries

Germany

Contacts

Public ContactUlrike Burkhardt

Consultant Clinical Research

ubu_home@web.de496819582660

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026