florbetapir-f-18 and Multiple-Sclerosis

We evaluated myelin changes throughout the central nervous system in Multiple Sclerosis (MS) patients by using hybrid [. We included 18 relapsing-remitting MS patients and 12 healthy controls. Each subject performed a hybrid [. Our findings demonstrate that [

Topics: Aniline Compounds; Brain; Diffusion Tensor Imaging; Ethylene Glycols; Humans; Magnetic Resonance Imaging; Multiple Sclerosis; Multiple Sclerosis, Relapsing-Remitting; Positron-Emission Tomography; White Matter

The observation that amyloid radiotracers developed for Alzheimer's disease bind to cerebral white matter paved the road to nuclear imaging of myelin in multiple sclerosis. The lysolecithin (lysophosphatidylcholine (LPC)) rat model of demyelination proved useful in evaluating and comparing candidate radiotracers to target myelin. Focal demyelination following stereotaxic LPC injection is larger than lesions observed in experimental autoimmune encephalitis models and is followed by spontaneous progressive remyelination. Moreover, the contralateral hemisphere may serve as an internal control in a given animal. However, demyelination can be accompanied by concurrent focal necrosis and/or adjacent ventricle dilation. The influence of these side effects on imaging findings has never been carefully assessed. The present study describes an optimization of the LPC model and highlights the use of MRI for controlling the variability and pitfalls of the model. The prototypical amyloid radiotracer [

Topics: Aniline Compounds; Animals; Autoradiography; Brain Edema; Carbon Radioisotopes; Cerebral Ventricles; Corpus Callosum; Corpus Striatum; Demyelinating Diseases; Dilatation, Pathologic; Disease Models, Animal; Ethylene Glycols; False Positive Reactions; Fluorine Radioisotopes; Image Processing, Computer-Assisted; Injections; Lysophosphatidylcholines; Magnetic Resonance Imaging; Male; Multiple Sclerosis; Myelin Sheath; Neuroimaging; Positron-Emission Tomography; Radiopharmaceuticals; Rats; Rats, Sprague-Dawley; Stereotaxic Techniques; Thiazoles