Blood–brain barrier permeability in type II diabetes
| Autor: | J V Bowler |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Gadolinium DTPA
Male medicine.medical_specialty Time Factors Contrast Media Vascular permeability Blood–brain barrier Capillary Permeability Reference Values Diabetes mellitus Internal medicine Medicine Dementia Humans Stroke Aged Cerebrospinal Fluid business.industry Cerebral infarction Leukoaraiosis Brain Cognition medicine.disease Magnetic Resonance Imaging Psychiatry and Mental health Editorial Commentary medicine.anatomical_structure Diabetes Mellitus Type 2 Blood-Brain Barrier Cardiology Surgery Neurology (clinical) business Neuroscience |
| Popis: | Patients with type II diabetes are at increased risk of cognitive impairment. The retinal and renal complications of diabetes follow microvascular damage permitting small arterioles to leak, hence the cerebral damage might also follow loss of blood-brain barrier (BBB) integrity. Magnetic resonance (MR) brain imaging with intravenous gadolinium (Gd) diethylenetriamine pentaacetic acid (Gd-DTPA) was used to identify increased BBB permeability.Ten well controlled type II diabetic patients aged 65-70 years and 10 controls underwent MR brain imaging with fluid attenuated inversion recovery (FLAIR); T1 weighted (T1W) volumetric imaging before; and T1W volumetric imaging at 5, 15, 30, 45, 60, and 90 minutes after intravenous Gd-DTPA. The T1W image before Gd-DTPA was subtracted from the images at each time point after Gd-DTPA. Net signal intensity was plotted against time for different brain regions. White matter hyperintensities were scored from the FLAIR image.The signal intensity/time curves showed that brain signal intensity increased more in the diabetic group than controls during the first 15 minutes after Gd-DTPA, particularly in the basal ganglia (p=0.018). Signal intensity in controls peaked at five minutes and diabetics at 15 minutes. Subjects with more white matter hyperintensities had greater signal increase after Gd-DTPA, whether diabetic or not (p=0.001).Increased BBB permeability with MR imaging was detected in patients with type II diabetes or white matter hyperintensities. Increased permeability of the BBB might account for some of the cerebral effects of type II diabetes, and so possibly also for the effect of other conditions that affect the microvasculature (like hypertension), on the brain. |
| Databáze: | OpenAIRE |
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