Synthesis, radiolabeling and initial in vivo evaluation of [(11)C]KSM-01 for imaging PPAR-α receptors.
Bioorg Med Chem Lett
; 22(19): 6233-6, 2012 Oct 01.
Article
in En
| MEDLINE
| ID: mdl-22939697
ABSTRACT
Peroxisome proliferator-activated receptor alpha (PPAR-α) is a ligand-activated nuclear receptor transcription factor that regulates the fatty acid ß-oxidation. An in vitro assay identified the p-methoxy phenyl ureido thiobutyric acid derivative KSM-01 (IC(50)=0.28±0.09nM) having a higher affinity to activate PPAR-α than the PPAR-α agonist GW7647 (IC(50)=0.46±0.19nM). In this study, we report the synthesis and initial in vivo evaluation of [(11)C]KSM-01. The radiosynthesis was carried out by first alkylating the corresponding p-phenol precursor with [(11)C]MeI in DMF using NaOH, followed by deprotection of the t-butyl ester group by TFA, yielding [(11)C]KSM-01. SUV analysis of dynamic micro PET/CT imaging data showed that [(11)C]KSM-01 accumulation was â¼2.0-fold greater in cardiac-specific PPAR-α overexpressing transgenic mice compared to wild-type littermates. The post-PET biodistribution studies were consistent with these results and demonstrated 2.5-fold greater radiotracer uptake in the heart of transgenic mice compared to the wild-type littermates. These results demonstrate the potential utility of PPAR-α agonists as PET radiopharmaceuticals.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phenylurea Compounds
/
Butyrates
/
Radiopharmaceuticals
/
PPAR alpha
/
Isotope Labeling
Type of study:
Prognostic_studies
Limits:
Animals
/
Humans
Language:
En
Journal:
Bioorg Med Chem Lett
Journal subject:
BIOQUIMICA
/
QUIMICA
Year:
2012
Type:
Article
Affiliation country:
United States