NCT00708929

Does Complement Factor H Gene Polymorphism Play a Role in the Regulation of Vascular Tone in the Choroid?

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 100 (actual)
• Sponsor: Medical University of Vienna · Academic / Other
• Sex: All
• Age: 18 Years – 45 Years
• Healthy volunteers: Accepted

Summary

Age related macular degeneration (AMD) is a multifactorial disease with a strong genetic component. Most importantly a genetic polymorphism in the gene encoding for the complement factor H (CFH) has been recently identified which is highly associated with an increased risk of developing AMD. This Tyr402His polymorphism located on chromosome 1q31 has been implicated to play a role in the development of the disease. Given that it is known that impaired regulation of choroidal vascular tone is present in patients with AMD, the current study seeks to investigate whether the Tyr402His polymorphism is associated with altered choroidal autoregulation in healthy subjects. For this purpose a total of 100 healthy volunteers will be included in order to test the hypothesis that an impaired regulation of choroidal blood flow is present in subjects with homozygous Tyr402His variant.

Conditions

• Genetic Polymorphism
• Macular Degeneration
• Regional Blood Flow
• Ocular Physiology

Interventions

Type	Name	Description
PROCEDURE	Squatting	Squatting for 6 minutes

Timeline

• Start date: 2009-06-01
• Primary completion: 2011-12-01
• Completion: 2011-12-01
• First posted: 2008-07-03
• Last updated: 2013-03-19

Locations

1 site across 1 country: Austria