Related Experiment Videos
Effect of malathion on the initiation and elongation steps of transcription
1Department of Molecular Genetics, University of Lódź, Poland.
Acta Biochimica Polonica
|January 1, 1990
Abstract:
In isolated cell nuclei of pig thymus malathion, S-1,2-bis(ethoxycarbonyl)-ethyl-O,O-dimethyldithiophosphate inhibited both initiation and elongation of all three classes of nuclear RNA polymerases; proflavin was used as an inhibitor of initiation, and actinomycin, as an inhibitor of elongation.
Insights
Malathion, an organophosphate pesticide, inhibits RNA synthesis in pig thymus cell nuclei. It affects both the start (initiation) and continuation (elongation) of RNA production by all three nuclear RNA polymerases.
Area of Science:
- Biochemistry
- Toxicology
- Molecular Biology
Background:
- Malathion is an organophosphate insecticide.
- Nuclear RNA polymerases are crucial for gene expression.
- Understanding pesticide effects on cellular processes is vital.
Purpose of the Study:
- To investigate the impact of malathion on RNA synthesis in pig thymus cell nuclei.
- To determine how malathion affects different stages of RNA transcription.
Main Methods:
- Isolated pig thymus cell nuclei were used.
- Malathion (S-1,2-bis(ethoxycarbonyl)-ethyl-O,O-dimethyldithiophosphate) was applied.
- Proflavin and actinomycin were used as specific inhibitors for initiation and elongation, respectively.
Main Results:
- Malathion inhibited both the initiation and elongation phases of RNA synthesis.
- This inhibition affected all three classes of nuclear RNA polymerases.
- The effects were observed in isolated cell nuclei.
Conclusions:
- Malathion disrupts eukaryotic transcription at both initiation and elongation steps.
- The pesticide interferes with the function of multiple nuclear RNA polymerases.
- These findings highlight the potential of malathion to impair fundamental cellular processes.