Synthesis and Preclinical Evaluation of an 18F-Labeled Synaptic Vesicle Glycoprotein 2A PET Imaging Probe: [18F]SynVesT-2
摘要:
Synaptic vesicle glycoprotein 2A (SV2A) is a 12-pass transmembrane glycoprotein ubiquitously expressed in presynaptic vesicles. In vivo imaging of SV2A using PET has potential applications in the diagnosis and prognosis of a variety of neuropsychiatric diseases, e.g., Alzheimer's disease, Parkinson's disease, schizophrenia, multiple sclerosis, autism, epilepsy, stroke, traumatic brain injury, post-traumatic stress disorder, depression, etc. Herein, we report the synthesis and evaluation of a new F-18-labeled SV2A PET imaging probe, [F-18]SynVesT-2, which possesses fast in vivo binding kinetics and high specific binding signals in non-human primate brain.
The invention provides a polymyxin compound of formula (I) and salts, solvates and protected forms thereof, pharmaceutical compositions comprising the compounds of formula (I), and the use of the compounds and compositions in methods of treatment, such as methods for the treatment of microbial infections. The compounds of formula (I) are represented thus: formula (I) wherein -R15 is a group: formula (II) and -R16 is hydrogen; -R17 is hydrogen; -L- is a covalent bond or methylene; and -Ar is optionally substituted aryl. The groups -X-, -R1, -R2, -R3, -R4, and -R8 are as defined herein.