LONG-CHAIN F-18 FATTY-ACIDS FOR THE STUDY OF REGIONAL METABOLISM IN HEART AND LIVER - ODD-EVEN EFFECTS OF METABOLISM IN MICE
- 1 January 1979
- journal article
- research article
- Vol. 20 (11), 1170-1175
Abstract
Regarding the potential usefulness of fluorine-tagged fatty acids in the study of regional metabolism in the heart and liver, the time courses of uptake and release of 9,10-[18F]fluorostearic acid, 2-[18F]fluorostearic acid, 16-[18F]fluorohexadecanoic acid, 17-[18F]fluoroheptadecanoic acid were investigated in several organs of NMRI mice. Whereas 2-[18F]fluorostearic acid shows very little uptake in the heart muscle but an increasing accumulation in the liver, the fatty acids with the F-18 label in the middle or at the end of the carbon chain exhibit uptake and elimination behavior similar to that of the analogous C-11 labeled compounds. After rapid concentration in the heart within 1 min, clearance takes place with fast and slow components. 16-[18F]fluorohexadecanoic acid and 17-[18F]fluoroheptadecanoic acid have different half-times of elimination. These differences are also reflected by the fact that nearly all the activity present in the heart can be recovered as fluoride(F-18) in the case of 17-[18F]fluoroheptadecanoic acid, whereas practically no fluoride was found among the metabolites of 16-[18F]fluorohexadecanoic acid. Similar differences were observed for the F-18 activity in bone. The results can be interpreted in terms of the odd-even rule: .beta. oxidation of even-numbered fatty acids ends up with [18F]fluoroacetic acid, whereas the odd-numbered fatty acids give rise to .beta.-[18F]fluoropropionic acid. Only in the latter case does dehalogenation take place leading to free fluoride, whereas fluoroacetic acid undergoes further reactions in the citric acid cycle.This publication has 7 references indexed in Scilit:
- COMPARATIVE EVALUATION OF FATTY-ACIDS LABELED WITH C-11, CL-34M, BR-77, AND I-123 FOR METABOLIC STUDIES OF MYOCARDIUM1978
- External detection and visualization of myocardial ischemia with 11C-substrates in vitro and in vivo.Circulation Research, 1976
- EXPERIMENTAL BASIS FOR MYOCARDIAL IMAGING WITH I-123-LABELED HEXADECENOIC ACID1976
- Studies on glutathione S-alkyltransferase of the ratBiochemical Journal, 1966
- Use of Radioiodinated Fatty Acid for Photoscans of the HeartCirculation Research, 1965
- Biochemical studies of toxic agents. 12. The biosynthesis of n-propylmercapturic acid from n-propyl halidesBiochemical Journal, 1960
- A SIMPLE METHOD FOR THE ISOLATION AND PURIFICATION OF TOTAL LIPIDES FROM ANIMAL TISSUESJournal of Biological Chemistry, 1957