Significance of cytoplasmic fatty acid-binding protein for the ischemic heart.
Ischemia of the heart is accompanied by the tissue accumulation of long-chain fatty acids and their metabolic derivatives such as beta-hydroxy fatty acids and fatty acyl-CoA and acyl-L-carnitine esters. These substances might be detrimental for proper myocardial function. Previously, it has been suggested that intracellular lipid binding proteins like cytoplasmic fatty acid-binding protein (FABP) and acyl-CoA binding protein (ACBP) may bind these accumulating fatty acyl moieties to prevent their elevated levels from potentially harmful actions. In addition, the suggestion has been made that the abundantly present FABP may scavenge free radicals which are generated during reperfusion of the ischemic heart. However, these protective actions are challenged by the continuous physico-chemical partition of fatty acyl moieties between FABP and membrane structures and by the rapid release of FABP from ischemic and reperfused cardiac muscle. Careful evaluation of the available literature data reveals that at present no definite conclusion can be drawn about the potential protective effect of FABP on the ischemic and reperfused heart.
Glatz
J F
JF
Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), University of Limburg, The Netherlands.
Vork
M M
MM
van der Vusse
G J
GJ
D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism*; D003593:Cytoplasm / Q000378:metabolism*; D000071438:Fatty Acid-Binding Protein 7; D050556:Fatty Acid-Binding Proteins; D005227:Fatty Acids / Q000378:metabolism*; D006801:Humans; D017202:Myocardial Ischemia / Q000378:metabolism*; D009363:Neoplasm Proteins; D025521:Tumor Suppressor Proteins
D002352:Carrier Proteins; C107608:FABP7 protein, human; D000071438:Fatty Acid-Binding Protein 7; D050556:Fatty Acid-Binding Proteins; D005227:Fatty Acids; D009363:Neoplasm Proteins; D025521:Tumor Suppressor Proteins