Short answer

When designing new chemical entities for biological targets, consider exploring novel scaffolds like aminopyridine-3,5-dicarbonitriles and systematically vary substituents to fine-tune affinity, selectivity, and efficacy.

Field: Innovation & Design
Source: Florence Research (University of Florence) (2017)
Method: Synthesis and biological evaluation (binding and functional assays), supported by molecular modelling.
Evidence: Strong effect

New chemical compounds, specifically aminopyridine-3,5-dicarbonitriles, exhibit diverse affinities and efficacies at adenosine receptor subtypes, offering potential for targeted therapeutic development. This innovation & design research insight is drawn from a 2017 study published in Florence Research (University of Florence). Using Synthesis and biological evaluation (binding and functional assays), supported by molecular modelling., researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing new chemical entities for biological targets, consider exploring novel scaffolds like aminopyridine-3,5-dicarbonitriles and systematically vary substituents to fine-tune affinity, selectivity, and efficacy.

Study

Innovation & DesignHigh ImpactStrong effect

Aminopyridine-3,5-dicarbonitriles: Novel Adenosine Receptor Ligands with Tunable Efficacy

Florence Research (University of Florence) · 2017

Key Findings

01Aminopyridine-3,5-dicarbonitrile derivatives show a wide range of affinities and varying degrees of efficacy at different adenosine receptor subtypes.
02Compounds designed to target A1 and A2B receptors (DCP1 and DCP2B sets) demonstrated high affinity and selectivity for the human A1 receptor.
03One compound (compound 1) acted as a dual A1 inverse agonist/A2A antagonist and effectively reversed allodynia in a mouse model of neuropathic pain at low oral doses.
04Compound 1 exhibited stability in mouse and human plasma.

Application

Design takeaway

How to apply

In drug discovery projects, systematically synthesize and test libraries of compounds based on promising scaffolds, using computational modelling to predict and optimize interactions with target receptors.

Project actions

01When exploring new chemical structures, consider their potential for interaction with known biological targets.
02Use computational tools to predict how molecular changes might affect biological activity.

Method & Evidence

AimTo design, synthesize, and evaluate new aminopyridine-3,5-dicarbonitrile derivatives as ligands for adenosine receptors, assessing their affinity, selectivity, and efficacy.

MethodSynthesis and biological evaluation (binding and functional assays), supported by molecular modelling.

ProcedureResearchers synthesized numerous aminopyridine-3,5-dicarbonitrile derivatives and tested them for their ability to bind to adenosine receptors and elicit a biological response. Molecular modelling was used to guide the design of compounds targeting specific receptor subtypes (A1 and A2B). Selected compounds were further evaluated in a neuropathic pain model in mice and subjected to plasma stability studies.

ContextMedicinal chemistry, pharmacology, drug discovery.

Variables

IV["Chemical structure of aminopyridine-3,5-dicarbonitrile derivatives","Modifications at the thiazole moiety"]

DV["Affinity for adenosine receptor subtypes","Selectivity for adenosine receptor subtypes","Efficacy (agonist, partial agonist, inverse agonist) at adenosine receptors","Reversal of allodynia in a neuropathic pain model","Plasma stability"]

CV["Adenosine receptor subtypes (A1, A2A, A2B)","Experimental conditions for binding and functional assays","Dosage of compounds in animal models","Plasma composition (mouse vs. human)"]

Strengths & Limitations

Strengths

+Exploration of a relatively under-investigated chemical series (aminopyridine-3,5-dicarbonitriles).
+Integration of synthesis, biological evaluation, and molecular modelling.
+Demonstration of in vivo efficacy for a promising compound.

Limitations

The study acknowledges that further research is needed to fully understand the compounds' mechanisms and optimize their properties. The complexity of biological systems means that results from animal models may not always directly translate to humans.

Reliability & validity

The reliability of the synthesis would depend on the reproducibility of the chemical reactions. Validity would be supported by consistent results across binding and functional assays, and by the use of appropriate controls in biological testing. The in vivo study's validity would depend on the appropriate design of the animal model and statistical analysis.

Think critically

How might the 'paradoxical data' regarding compound 1's efficacy be explained, and what further experiments would be necessary to clarify these findings?

Design Principles

"Modulate chemical structure to achieve specific pharmacological profiles at biological targets."

Understanding the structure-activity relationships of novel chemical scaffolds is crucial for drug discovery and the development of new therapeutic agents. This research highlights a promising class of compounds that can be modulated to achieve specific pharmacological outcomes, impacting the design of future medicinal chemistry projects.

What This Means for Your Design

Scientists made new molecules that can attach to certain parts of our bodies called adenosine receptors. Some of these molecules work better than others and can be changed to do different things, like help with pain.

How to use in your project

1.Refer to this study when investigating the design of novel compounds for specific biological functions or therapeutic targets.
2.Use the findings to justify the exploration of structure-activity relationships in your own design project.

Add to My Project

Quick Cite

Paragraph starter

The development of novel aminopyridine-3,5-dicarbonitrile derivatives, as demonstrated by Betti (2017), offers a compelling case study in the design of targeted pharmacological agents. This research highlights how systematic structural modifications can yield compounds with diverse affinities and efficacies at adenosine receptors, including a dual A1 inverse agonist/A2A antagonist that showed significant efficacy in a neuropathic pain model. Such work underscores the value of exploring new chemical scaffolds and employing molecular modelling to guide the design of molecules with specific therapeutic potential.

Source

Florence Research (University of Florence)

Design, synthesis and pharmacological evaluation of new adenosine receptor ligands

journal · 2017

View source

Questions About This Research

What does the research say about aminopyridine-3,5-dicarbonitriles: novel adenosine receptor ligands with tunable efficacy?: When designing new chemical entities for biological targets, consider exploring novel scaffolds like aminopyridine-3,5-dicarbonitriles and systematically vary substituents to fine-tune affinity, selectivity, and efficacy. Evidence: Florence Research (University of Florence) (2017).
Why does "Aminopyridine-3,5-dicarbonitriles: Novel Adenosine Receptor Ligands with Tunable Efficacy" matter for design?: Understanding the structure-activity relationships of novel chemical scaffolds is crucial for drug discovery and the development of new therapeutic agents. This research highlights a promising class of compounds that can be modulated to achieve specific pharmacological outcomes, impacting the design of future medicinal chemistry projects.
How can designers apply this research?: When designing new chemical entities for biological targets, consider exploring novel scaffolds like aminopyridine-3,5-dicarbonitriles and systematically vary substituents to fine-tune affinity, selectivity, and efficacy.
What were the main findings?: Aminopyridine-3,5-dicarbonitrile derivatives show a wide range of affinities and varying degrees of efficacy at different adenosine receptor subtypes.. Compounds designed to target A1 and A2B receptors (DCP1 and DCP2B sets) demonstrated high affinity and selectivity for the human A1 receptor.. One compound (compound 1) acted as a dual A1 inverse agonist/A2A antagonist and effectively reversed allodynia in a mouse model of neuropathic pain at low oral doses.. Compound 1 exhibited stability in mouse and human plasma.
What research method was used?: Synthesis and biological evaluation (binding and functional assays), supported by molecular modelling..
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2017 journal from Florence Research (University of Florence).
What should I do differently in my next project?: In drug discovery projects, systematically synthesize and test libraries of compounds based on promising scaffolds, using computational modelling to predict and optimize interactions with target receptors.
What are the limitations?: The research is described as needing further deepening, suggesting that the findings are preliminary and require more extensive investigation. The exact mechanisms underlying the observed effects, particularly the 'paradoxical data' mentioned, require further clarification.