Determination of free malonaldehyde formed in liver microsomes upon CCl4 oxidation.

The research study focuses on the process and measurement of free malonaldehyde produced in liver microsomes upon oxidation by CCl4 in various animal species, which might provide insights into lipid peroxidation, a biochemical process.

Objective of the Study

• The study’s main objective was to understand and measure the production of free malonaldehyde when liver microsomes from different animal species are oxidized with carbon tetrachloride (CCl4). This could provide insights into understanding the in-vitro lipid peroxidation process.

Methodology

• Free malonaldehyde was obtained from the microsomes prepared from the livers of several animals including monkeys, rats, rabbits, mice, cows, pigs, dogs, sheep, and horses.
• The CCl4 oxidation treatment was administered to these microsomes and the resulting free malonaldehyde was derivatized, i.e., chemically modified, by reacting with N-methylhydrazine to form 1-methylpyrazole.
• The formed 1-methylpyrazole was analyzed using capillary gas chromatography, a technique used for separating and analyzing compounds that can be vaporized without decomposition.

Findings

• Among the tested animal livers, those from the monkey and rat produced the most amount of malonaldehyde when treated with CCl4.
• The horse liver demonstrated strong resistance to CCl4 oxidation, indicating less production of malonaldehyde.
• The capillary gas chromatography method used in the study exhibited precise and specific measurement of free malonaldehyde, validating its effectiveness.

Implications

• This research provides a better understanding of the biochemical process of in-vitro lipid peroxidation using the formation of malonaldehyde as an indicator. Lipid peroxidation is a process where free radicals steal electrons from the lipids in our cell membranes, resulting in cell damage.