TY  - JOUR
A1  - Üçeyler, Nurcan
A1  - Homola, György A.
A1  - González, Hans Guerrero
A1  - Kramer, Daniela
A1  - Wanner, Christoph
A1  - Weidemann, Frank
A1  - Solymosi, László
A1  - Sommer, Claudia
T1  - Increased Arterial Diameters in the Posterior Cerebral Circulation in Men with Fabry Disease
N2  - A high load of white matter lesions and enlarged basilar arteries have been shown in selected patients with Fabry disease, a disorder associated with an increased stroke risk. We studied a large cohort of patients with Fabry disease to differentially investigate white matter lesion load and cerebral artery diameters. We retrospectively analyzed cranial magnetic resonance imaging scans of 87 consecutive Fabry patients, 20 patients with ischemic stroke, and 36 controls. We determined the white matter lesion load applying the Fazekas score on fluid-attenuated inversion recovery sequences and measured the diameters of cerebral arteries on 3D-reconstructions of the time-of-flight-MR-angiography scans. Data of different Fabry patient subgroups (males – females; normal – impaired renal function) were compared with data of patients with stroke and controls. A history of stroke or transient ischemic attacks was present in 4/30 males (13%) and 5/57 (9%) females with Fabry disease, all in the anterior circulation. Only one man with Fabry disease showed confluent cerebral white matter lesions in the Fazekas score assessment (1%). Male Fabry patients had a larger basilar artery (p<0.01) and posterior cerebral artery diameter (p<0.05) compared to male controls. This was independent of disease severity as measured by renal function and did not lead to changes in arterial blood flow properties. A basilar artery diameter of >3.2 mm distinguished between men with Fabry disease and controls (sensitivity: 87%, specificity: 86%, p<0.001), but not from stroke patients. Enlarged arterial diameters of the posterior circulation are present only in men with Fabry disease independent of disease severity.
KW  - Arterial Diameters
KW  - ischemic stroke
KW  - magnetic resonance imaging
KW  - stroke
KW  - cerebral arteries
KW  - renal system
KW  - central nervous system
KW  - blood flow
KW  - lesions
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-112614
ER  - 
TY  - THES
A1  - Guerrero González, Hans
T1  - Quantifizierung von prä- und postsynaptischen Protein-Veränderungen in der Amygdala-Region in SPRED2-defizienten Mäusen
T1  - Quantification of pre- and postsynaptic protein-alterations in the amygdala-region in SPRED2-deficient mice
N2  - SPRED2 ist ein Membran-assoziiertes Protein, das als wichtiger Regulator der Zelle fungiert. Es übt eine inhibitorische Wirkung auf dem Ras/ERK/MAPK-Signalweg und ist u.a. in der Neurogenese im zentralen Nervensystem beteiligt. Durch diverse Verhaltenstests in SPRED2-KO Mäusen konnten OCD-ähnliche Symptome bei den Tieren festgestellt werden sowie eine vermehrte Aktivität in thalamo-amygdalen Synapsen.  Zur weiteren Abklärung dieser synaptischen Dysfunktion, wurde eine Quantifizierung von prä- und postsynaptischen Protein-Veränderungen in der Amygdala-Region in SPRED2-defizienten Mäusen im Vergleich zur Wildtyp Mäusen durchgeführt. Hier konnten signifikante Unterschiede festgestellt werden.
N2  - SPRED2 is a membran associated protein that functions as an important cell-regulator. It has an inhibitory effect on the Ras/ERK/MAPK signaling pathway and is involved in neurogenesis of the central nervous system. Various behavioral tests in the SPRED2-KO mice displayed signs of OCD-behavior and showed an increased activity in thalamo-amygdal synapses. To further explain this synaptic dysfunction, a quantification of pre- and postsynaptic protein-alterations in the amygdala region was carried out in SPRED2-KO Mice. We were able to show significant difference between both groups.
KW  - Spred-Proteine
KW  - SPRED2
KW  - OCD
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-216701
ER  -