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Kostrucha, J. et al.

Inverse relationship of ethane or n-pentane and malondialdehyde formed during lipid peroxidation in rat liver microsomes with different oxygen concentrations.

When we incubated rat liver microsomes with ferrous ions and an NADPH-regenerating system, ethane and n-pentane formation increased correspondingly with decreasing concentrations of oxygen in the atmosphere above the incubation, whereas malondialdehyde increased with increasing oxygen concentrations up to a plateau. At very low oxygen concentrations - 100% helium as atmosphere, but presumably traces of oxygen were present in the microsomes - ethane and n-pentane formation were maximal and dependent on the concentrations of ferrous ions, in the case of ethane, a peak being reached at about 20 microM Fe2+, whereas n-pentane continuously increased with increasing concentrations of Fe2+. It is suggested that the inverse relationship of ethane or n-pentane and malondialdehyde is due to two different reaction sequences of microsomal lipid peroxidation with different oxygen sensitivities.[1]

References

Inverse relationship of ethane or n-pentane and malondialdehyde formed during lipid peroxidation in rat liver microsomes with different oxygen concentrations. Kostrucha, J., Kappus, H. Biochim. Biophys. Acta (1986) [Pubmed]

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