Am. Buzaleh et al., ALTERATIONS IN FLUORINATED ETHER ANESTHETICS EFFECTS ON HEME METABOLISM FOLLOWING CHRONIC ETHANOL-CONSUMPTION, General pharmacology, 26(6), 1995, pp. 1425-1429
1. The effect of enflurane or isoflurane anesthesia (1 ml/kg, i.p.) in
animals chronically treated with ethanol (30%, v/v, in drinking water
during a week) on heme metabolism and its regulation was investigated
. 2. In those animals previously intoxicated with ethanol that receive
d isoflurane, ALA-S activity was increased (control values: 0.071+/-0.
022 nmol/mg, n=10; treated animals: 0.110+/-0.034 nmol/mg, n=8) and bl
ood PBGase and deaminase were strikingly diminished (control values, n
=10: PBGase: 0.101+/-0.015 nmol/mg, deaminase: 0.242+/-0.075 nmol/mg;
treated animals, n=6: PBGase: 0.063+/-0.013 nmol/mg; deaminase: 0.145/-0.045 nmol/mg). 3. The time-response study showed that liver ALA-S i
s enhanced at shorter times of anesthesia with isoflurane and that blo
od PBGase and deaminase appeared inhibited later in animals previously
treated with ethanol. 4. Results reproduce some biochemical alteratio
ns known to occur in acute intermittent porphyria.