Imaging of Sigma1 Receptors in the Human Brain Using PET and [11C]SA4503

Title: Imaging of Sigma1 Receptors in the Human Brain Using PET and [11C]SA4503

Volume: 9 Issue: 3

Author(s): Jun Toyohara, Muneyuki Sakata and Kiichi Ishiwata

Affiliation:

Keywords: Sigma1 receptor, SA4503, positron emission tomography, brain

Abstract: Sigma1 receptors were imaged in living human brain by positron emission tomography (PET) using [11C] SA4503. A dynamic 90-min scan and kinetic analysis enabled quantification of receptor density in the brain. The sigma1 receptors were distributed throughout the brain in normal subjects, but decreased in the frontal, temporal, and occipital lobes, cerebellum and thalamus in patients with early Alzheimers disease and in the putamen in patients with Parkinsons disease. In addition, rates of receptor occupancy by the neuroleptic haloperidol and the selective serotonin reuptake inhibitor fluvoxamine were evaluated by [11C]SA4503-PET and found to be high. [11C]SA4503-PET is useful for studying the pathophysiology of neurological and psychiatric disorders such as schizophrenia and for evaluation of the pharmacodynamics of psychiatric drugs.

Cite this article as:

Toyohara Jun, Sakata Muneyuki and Ishiwata Kiichi, Imaging of Sigma1 Receptors in the Human Brain Using PET and [11C]SA4503, Central Nervous System Agents in Medicinal Chemistry 2009; 9 (3) . https://dx.doi.org/10.2174/1871524910909030190