Abstract:
:Rat Langendorff hearts perfused with media that do not contain erythrocytes or fluorocarbon as oxygen carriers are borderline aerobic during 5 Hz pacing. This follows from the release of catabolic products measured: lactate, urate and Iysophosphatidyl-choline (IysoPC). Addition of L-carnitine to the perfusion medium reduced the level of these compounds, while the release of long-chain acylcarnitine (LCAC) increased. Previously, we found (Biochim Biophys Acta 847:62-66,1985) that micromolar LCAC protects membranes during reperfusion after ischemia. Therefore, the observed inverse relation between LCAC and the other compounds measured suggests that LCAC is the basis of an acute relief of imminent ischemia by carnitine addition. LCAC may be released from various cell types, including vascular endothelium, as demonstrated. The cationic amphiphilic nature of LCAC is responsible for protection of membrane functions in imminent ischemia.
journal_name
Mol Cell Biochemjournal_title
Molecular and cellular biochemistryauthors
Hulsmann WC,Peschechera A,Serafini F,Ferrari LEdoi
10.1007/BF00239323subject
Has Abstractpub_date
1996-03-09 00:00:00pages
87-91issue
1eissn
0300-8177issn
1573-4919journal_volume
156pub_type
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