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Antiviral oligo- and polyribonucleotides containing selected triazolo[2,3-a]purines
M G Tutonda1, R W Buckheit, V K Agrawal
1Department of Medicinal Chemistry, 20 South 2030 East, 295 Biomedical Polymers Research Building, University of Utah, Salt Lake City, Utah 84112-9453, USA.
Journal of Medicinal Chemistry
|December 4, 1998
Summary
New antiviral compounds show promise against HIV and human cytomegalovirus (HCMV). The study highlights the importance of molecular structure and size in inhibiting viral replication, with specific compounds demonstrating significant potency.
Area of Science:
- Virology
- Medicinal Chemistry
- Molecular Biology
Background:
- Amphipathic polyribonucleotides exhibit antiviral activity against HIV and HCMV.
- A key hypothesis suggests ordered, non-hydrogen-bonded arrays in solution are crucial for antiviral efficacy.
Purpose of the Study:
- To investigate the impact of molecular structure and size on virus replication inhibition.
- To synthesize and evaluate novel triazolo[2,3-a]purine-based polynucleotides and oligonucleotides for antiviral properties.
Main Methods:
- Synthesis of a high-molecular-weight polynucleotide (PTPR) and two 32-mer oligonucleotides (TTPR, 5a) based on the triazolo[2,3-a]purine ring system.
- Assessment of antiviral activity against HIV and human cytomegalovirus (HCMV).
- Analysis of molecular structure through cooperative melting behavior studies.
Main Results:
- High-molecular-weight polynucleotide 4a (PTPR) and sulfur-containing 32-mer 5b (TTPR) demonstrated moderate activity against HIV.
- PTPR and TTPR showed greater potency against HCMV compared to ganciclovir.
- Cooperative melting behavior was observed in active compounds 4a and 5b, but not in the inactive 32-mer 5a.
Conclusions:
- The study supports the hypothesis that ordered molecular arrays are important for antiviral activity.
- Novel triazolo[2,3-a]purine derivatives show potential as antiviral agents, particularly against HCMV.
- Molecular structure and size are critical factors influencing the antiviral efficacy of these compounds.