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Published on: September 29, 2023
Carcinogenesis of β-Propiolactone: A Computational Study.
1Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia.
Beta-propiolactone (BPL) can damage DNA, but glutathione may protect against its harmful effects. Computer simulations reveal how BPL reacts with DNA bases and glutathione.
Area of Science:
- Computational chemistry
- Toxicology
- Molecular biology
Background:
- Beta-propiolactone (BPL) is a potential human carcinogen linked to tumor formation in animals.
- Despite risks, BPL is used in vaccines for viral inactivation due to its efficacy.
- Understanding BPL's reaction mechanisms is crucial for assessing its safety and applications.
Purpose of the Study:
- To investigate the reaction mechanisms of BPL with DNA nucleobases and glutathione (GSH).
- To elucidate the molecular interactions using quantum chemical methods and computer simulations.
- To evaluate the potential protective role of GSH against BPL-induced DNA damage.
Main Methods:
- Quantum chemical calculations were employed to simulate BPL reactions.
- Solvent effects were incorporated to determine activation energies.
- Reaction pathways (alkylation vs. acylation) and adduct formation were analyzed.
Main Results:
- Guanine showed the highest reactivity towards BPL, forming adducts via an SN2 mechanism.
- Alkylation was found to be energetically more favorable than acylation for all nucleobases.
- Glutathione exhibited a high scavenging potential for BPL, comparable to guanine.
Conclusions:
- Glutathione may act as a natural scavenger, protecting DNA from BPL.
- This protective mechanism could mitigate BPL's genotoxicity, mutagenicity, and carcinogenicity.
- The findings support the potential use of BPL in specific applications while highlighting protective biological mechanisms.
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