Structure Dependence of Long-Chain [18F]Fluorothia Fatty Acids as Myocardial Fatty Acid Oxidation Probes
摘要:
In vivo imaging of regional fatty acid oxidation (FAO) rates would have considerable potential for evaluation of mammalian diseases. We have synthesized and evaluated F-18-labeled thia fatty acid analogues as metabolically trapped FAO probes to understand the effect of chain length, degree of unsaturation, and placement of the thia substituent on myocardial uptake and retention. 18-[F-18]Fluoro-4-thia-(9Z)-octadec-9-enoic acid (3) showed excellent heart/background radioactivity concentration ratios along with highest retention in heart and liver. Pretreatment of rats with the CPT-1 inhibitor, POCA, caused >80% reduction in myocardial uptake of 16-[F-18]fluoro-4-thiahexadecanoic acid (2) and 3, indicating high specificity for FAO. In contrast, 18-[F-18]fluoro-4-thiaoctadecanoic acid (4) showed dramatically reduced myocardial uptake and blunted response to POCA. 18-[F-18]Fluoro-6-thiaoctadecanoic acid (5) showed moderate myocardial uptake and no sensitivity of myocardial uptake to POCA. The results demonstrate relationships between structures of F-18-labeled thia fatty acid and uptake and their utility as FAO probes in various tissues.
Structure Dependence of Long-Chain [18F]Fluorothia Fatty Acids as Myocardial Fatty Acid Oxidation Probes
摘要:
In vivo imaging of regional fatty acid oxidation (FAO) rates would have considerable potential for evaluation of mammalian diseases. We have synthesized and evaluated F-18-labeled thia fatty acid analogues as metabolically trapped FAO probes to understand the effect of chain length, degree of unsaturation, and placement of the thia substituent on myocardial uptake and retention. 18-[F-18]Fluoro-4-thia-(9Z)-octadec-9-enoic acid (3) showed excellent heart/background radioactivity concentration ratios along with highest retention in heart and liver. Pretreatment of rats with the CPT-1 inhibitor, POCA, caused >80% reduction in myocardial uptake of 16-[F-18]fluoro-4-thiahexadecanoic acid (2) and 3, indicating high specificity for FAO. In contrast, 18-[F-18]fluoro-4-thiaoctadecanoic acid (4) showed dramatically reduced myocardial uptake and blunted response to POCA. 18-[F-18]Fluoro-6-thiaoctadecanoic acid (5) showed moderate myocardial uptake and no sensitivity of myocardial uptake to POCA. The results demonstrate relationships between structures of F-18-labeled thia fatty acid and uptake and their utility as FAO probes in various tissues.
Neue schwefelhaltige Phospholipide, Verfahren zu deren Herstellung und diese Verbindungen enthaltende Arzneimittel
申请人:BOEHRINGER MANNHEIM GMBH
公开号:EP0050327B1
公开(公告)日:1984-06-20
US4444766A
申请人:——
公开号:US4444766A
公开(公告)日:1984-04-24
Structure Dependence of Long-Chain [<sup>18</sup>F]Fluorothia Fatty Acids as Myocardial Fatty Acid Oxidation Probes
作者:Mukesh K. Pandey、Anthony P. Belanger、Shuyan Wang、Timothy R. DeGrado
DOI:10.1021/jm301345v
日期:2012.12.13
In vivo imaging of regional fatty acid oxidation (FAO) rates would have considerable potential for evaluation of mammalian diseases. We have synthesized and evaluated F-18-labeled thia fatty acid analogues as metabolically trapped FAO probes to understand the effect of chain length, degree of unsaturation, and placement of the thia substituent on myocardial uptake and retention. 18-[F-18]Fluoro-4-thia-(9Z)-octadec-9-enoic acid (3) showed excellent heart/background radioactivity concentration ratios along with highest retention in heart and liver. Pretreatment of rats with the CPT-1 inhibitor, POCA, caused >80% reduction in myocardial uptake of 16-[F-18]fluoro-4-thiahexadecanoic acid (2) and 3, indicating high specificity for FAO. In contrast, 18-[F-18]fluoro-4-thiaoctadecanoic acid (4) showed dramatically reduced myocardial uptake and blunted response to POCA. 18-[F-18]Fluoro-6-thiaoctadecanoic acid (5) showed moderate myocardial uptake and no sensitivity of myocardial uptake to POCA. The results demonstrate relationships between structures of F-18-labeled thia fatty acid and uptake and their utility as FAO probes in various tissues.