Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

Logo MUG-Forschungsportal

Gewählte Publikation:

SHR Neuro Krebs Kardio Lipid

Told, R; Palkovits, S; Haslacher, H; Frantal, S; Schmidl, D; Boltz, A; Lasta, M; Kaya, S; Werkmeister, RM; Garhöfer, G; Schmetterer, L.
Alterations of choroidal blood flow regulation in young healthy subjects with complement factor H polymorphism.
PLoS One. 2013; 8(4):e60424-e60424 [OPEN ACCESS]
Web of Science PubMed PUBMED Central FullText FullText_MUG

 

Autor/innen der Med Uni Graz:
Palkovits Stefan
Altmetrics:

Dimensions Citations:

Plum Analytics:
Number of Figures: 3
| | |
Abstract:
A common polymorphism in the complement factor H gene (rs1061170, Y402H) is associated with a high risk of age-related macular degeneration (AMD). In the present study we hypothesized that healthy young subjects homozygous for the high-risk haplotype (CC) show abnormal choroidal blood flow (ChBF) regulation decades before potentially developing the disease. A total of 100 healthy young subjects were included in the present study, of which 4 subjects were excluded due to problems with genotyping or blood flow measurements. ChBF was measured continuously using laser Doppler flowmetry while the subjects performed isometric exercise (squatting) for 6 minutes. The increase in ChBF was less pronounced than the response in ocular perfusion pressure (OPP), indicating for some degree of choroidal blood flow regulation. Eighteen subjects were homozygous for C, 47 subjects were homozygous for T and 31 subjects were heterozygous (CT). The increase in OPP during isometric exercise was not different between groups. By contrast the increase in ChBF was more pronounced in subjects homozygous for the high risk C allele (p = 0.041). This was also evident from the pressure/flow relationship, where the increase in ChBF in homozygous C carriers started at lower OPPs as compared to the other groups. Our data indicate that the regulation of ChBF is abnormal in rs1061170 CC carriers. So far this polymorphism has been linked to age related macular degeneration (AMD) mainly via inflammatory pathways associated with the complement system dysfunction. Our results indicate that it could also be related to vascular factors that have been implicated in AMD pathogenesis.
Find related publications in this database (using NLM MeSH Indexing)
Adolescent -
Adult -
Blood Pressure -
Choroid - blood supply
Complement Factor H - genetics
Female -
Heart Rate -
Hemodynamics -
Heterozygote -
Homozygote -
Humans -
Intraocular Pressure -
Macular Degeneration - genetics
Male -
Polymorphism, Genetic -
Regional Blood Flow -
Young Adult -

© Meduni Graz Impressum