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A Study to Assess the Effect of a 3-month Folate Supplementation on Systemic Homocysteine Plasma Concentration and Ocular Blood Flow in Patients With Diabetes

Diabetes Clinical Trial

Official title:
A Pilot Study to Assess the Effect of a 3-month Folate Supplementation on Systemic Homocysteine Plasma Concentration and Ocular Blood Flow in Patients With Diabetes

Clinical Trial Summary

There is evidence that a folate deficiency - and as the biological consequence of the latter - higher homocysteine plasma levels are associated with an increased risk of vascular associated diseases. For the eye, it has been shown that higher intake of folate reduces the risk of vascular related diseases such as age related macular degeneration. Further studies suggest that decreased serum levels of folate and vitamin B12 may be an independent risk factor for diabetic retinopathy. The reason for the association of low folate levels and the increased risk for vascular-associated ocular diseases is not entirely clear but may be at least partially related to an impairment of local blood flow regulation in these patients.

Whether supplementation with folate may improve vascular regulation has not yet been sufficiently investigated. However, given that the potential effect size of a folate substitution on blood flow and systemic blood parameters is unclear, a proper statistical design for a large, controlled, randomized study is difficult. Thus, the present pilot study should (1) provide information about the homocysteine lowering potential of the formulation under study and (2) identify potential vascular related outcome parameters for further, larger, placebo-controlled studies and provide sufficient data to allow for a proper statistical planning for such a study.

Consequently, the current study seeks to investigate the effect of a 3-month supplementation with folate on systemic homocysteine plasma levels. Further, ocular blood flow and endothelial function in the ocular microcirculation will be assessed. For this purpose, a group of 25 patients with diabetes mellitus will be included in the study. Outcome parameters will be assessed at baseline and after a 3-month supplementation with folate.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT03997032
Study type Interventional
Source Medical University of Vienna
Contact
Status Completed
Phase N/A
Start date July 31, 2017
Completion date July 17, 2018
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