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Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay
Published on: February 9, 2021
Cytotoxicity and antineoplastic activities of alkylamines and their borane derivatives
I H Hall1, E Y Tse, R A Muhammad
1Division of Medicinal Chemistry and Natural Products School of Pharmacy University of North Carolina Chapel Hill NC 27599-7360 USA.
Abstract:
The alkylamines and their related boron derivatives demonstrated potent cytotoxicity against the growth of murine and human tissue cultured cells. These agents did not necessarily require the boron atom to possess potent cytotoxic action in certain tumor lines. Their ability to suppress tumor cell growth was based on their inhibition of DNA and protein syntheses. DNA synthesis was reduced because purine synthesis was blocked at the enzyme site of IMP dehydrogenase by the agents. In addition ribonucleotide reductase and nucleoside kinase activities were reduced by the agents which would account for the reduced d[NTP] pools. The DNA template or molecule may be a target of the drugs with regard to binding of the drug to nucleoside bases or intercalaction of the drug between DNA base pairs. Only some Of the agents caused DNA fragmentation with reduced DNA viscosity. These effects would contribute to overall cell death afforded by the agents.
Insights
Alkylamine compounds show potent anti-cancer effects by inhibiting DNA and protein synthesis in tumor cells. These agents disrupt purine synthesis and reduce nucleotide pools, leading to cell death.
Area of Science:
- Biochemistry
- Molecular Biology
- Pharmacology
Background:
- Alkylamines and boron derivatives exhibit significant cytotoxicity.
- Cytotoxic action is not solely dependent on the boron atom for certain tumor types.
Purpose of the Study:
- To investigate the cytotoxic mechanisms of alkylamines and related boron derivatives.
- To understand how these agents inhibit tumor cell growth.
Main Methods:
- Assessing cytotoxicity in murine and human tissue cultured cells.
- Measuring inhibition of DNA and protein synthesis.
- Analyzing effects on IMP dehydrogenase, ribonucleotide reductase, and nucleoside kinase activities.
Main Results:
- Alkylamines inhibit DNA and protein synthesis.
- Purine synthesis is blocked at IMP dehydrogenase.
- Reduced ribonucleotide reductase and nucleoside kinase activities lead to decreased d[NTP] pools.
- Some agents cause DNA fragmentation and reduced DNA viscosity.
Conclusions:
- Alkylamines suppress tumor cell growth through multifaceted inhibition of DNA and protein synthesis.
- Potential mechanisms include blocking purine synthesis, depleting nucleotide pools, and direct DNA interaction.
- These molecular effects contribute to the observed cell death.
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