TY - JOUR
T1 - δ-Aminolevulinic acid-induced lipid peroxidation in rat kidney and liver is attenuated by melatonin
T2 - An in vitro and in vivo study
AU - Carneiro, Regina C.G.
AU - Reiter, Russel J.
PY - 1998
Y1 - 1998
N2 - Acute intermittent porphyria (AIP) is a genetically inherited disease characterized by a partial block in liver heme biosynthesis and by increased urinary excretion of the δ-aminolevulinic acid (ALA). Recently, it has been proposed that the toxic effects of ALA are related to the generation of free radicals. In the present study the in vitro and in vivo effect of melatonin, a recently described antioxidative agent, on ALA-induced lipid peroxidation in rat liver and kidney was determined. The concentration of malonaldehyde (MDA) and 4-hydroxyalkenals (4-HDA) was assayed as an index of induced membrane oxidative damage. In vitro melatonin protected, in a concentration-dependent manner, against ALA-induced lipid peroxidation in liver and kidney homogenates. In in vivo experiments as well, it was demonstrated that ALA (40 mg/kg)-induced lipid peroxidation in liver and kidney was reduced by acute melatonin (10 mg/kg) treatment. The results support the involvement of free radicals in ALA toxicity and show that in vitro and in vivo melatonin confers protection against this toxicity, likely due to the antioxidative capability of the indole.
AB - Acute intermittent porphyria (AIP) is a genetically inherited disease characterized by a partial block in liver heme biosynthesis and by increased urinary excretion of the δ-aminolevulinic acid (ALA). Recently, it has been proposed that the toxic effects of ALA are related to the generation of free radicals. In the present study the in vitro and in vivo effect of melatonin, a recently described antioxidative agent, on ALA-induced lipid peroxidation in rat liver and kidney was determined. The concentration of malonaldehyde (MDA) and 4-hydroxyalkenals (4-HDA) was assayed as an index of induced membrane oxidative damage. In vitro melatonin protected, in a concentration-dependent manner, against ALA-induced lipid peroxidation in liver and kidney homogenates. In in vivo experiments as well, it was demonstrated that ALA (40 mg/kg)-induced lipid peroxidation in liver and kidney was reduced by acute melatonin (10 mg/kg) treatment. The results support the involvement of free radicals in ALA toxicity and show that in vitro and in vivo melatonin confers protection against this toxicity, likely due to the antioxidative capability of the indole.
KW - Antioxidant
KW - Kidney, liver
KW - Lipid peroxidation
KW - Melatonin
KW - δ-Aminolevulinic acid
UR - http://www.scopus.com/inward/record.url?scp=0031971571&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031971571&partnerID=8YFLogxK
U2 - 10.1111/j.1600-079X.1998.tb00524.x
DO - 10.1111/j.1600-079X.1998.tb00524.x
M3 - Article
C2 - 9551848
AN - SCOPUS:0031971571
SN - 0742-3098
VL - 24
SP - 131
EP - 136
JO - Journal of pineal research
JF - Journal of pineal research
IS - 3
ER -