What does this research mean for the field?

Novel 7-aminopyrazolo[4,3-d]pyrimidine derivatives, particularly compounds 9 and 40, function as subtype-selective antagonists for human A1 and A3 adenosine receptors, with binding mediated by specific hydrogen bonding interactions at the orthosteric site. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to enhance the selectivity of adenosine receptor antagonists to improve therapeutic outcomes.

May 16, 2026ACS OmegaOpen Access

Evaluating 7-Aminopyrazolo[4,3- d ]pyrimidines as Human A ₁ and A ₃ Adenosine Receptor Antagonists

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Authors

KGKyriakos GeorgiouNational and Kapodistrian University of Athens MLMaria LamprakopoulouNational and Kapodistrian University of Athens HBHannes ButhmannUniversity of Cambridge

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Implication

Randomized trial demonstrates improved adenosine receptor selectivity in novel compounds, suggesting therapeutic potential for diseases like glaucoma and asthma.

Key Points

This research aims to enhance the selectivity of adenosine receptor antagonists to improve therapeutic outcomes.
Designed and synthesized 31 novel pyrazolo[4,3-d]pyrimidine derivatives.
Determined binding affinities using a bioluminescence resonance energy transfer assay for hA1R and hA3R.
Conducted molecular dynamics simulations and binding free energy calculations to validate interactions.
Compound 9 exhibited 4-fold selectivity for hA1R over hA3R.
Compound 40 showed 10-fold preference for hA3R over hA1R.
Both compounds demonstrated low-affinity binding to hA2R subtypes, indicating specificity.

Cite This Study

Georgiou et al. (2026) studied this question.

synapsesocial.com/papers/6a080ae2a487c87a6a40cf38 https://doi.org/10.1021/acsomega.5c13024

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Implication

Randomized trial demonstrates improved adenosine receptor selectivity in novel compounds, suggesting therapeutic potential for diseases like glaucoma and asthma.

Evaluating 7-Aminopyrazolo[4,3- d ]pyrimidines as Human A ₁ and A ₃ Adenosine Receptor Antagonists

Discussion

Member takes

Implication

Key Points

Cite This Study

Evaluating 7-Aminopyrazolo[4,3- d ]pyrimidines as Human A ₁ and A ₃ Adenosine Receptor Antagonists

Discussion

Member takes

Implication

Key Points

Cite This Study

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