Heterocyclic Compounds Lowering Blood RBP4 for Diabetes

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Solution Overview

Problem

Current compounds fail to effectively lower blood Retinol Binding Protein 4 (RBP4) concentrations, which are associated with insulin resistance and diabetes, limiting their therapeutic potential for lifestyle-related diseases.

Innovation Solution

Development of specific heterocyclic compounds represented by formula (I) or their salts/prodrugs, which inhibit the binding of RBP4 and retinol, thereby preventing the formation of a complex with Transthyretin, leading to reduced RBP4 levels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If current compounds are used to lower blood RBP4 concentrations, then some therapeutic effect is achieved, but the RBP4-lowering action is insufficient for effective diabetes treatment

Engineering Contradiction:
Improveblood RBP4 concentrationVSAvoidtherapeutic effectiveness
Core Design Contradiction:
Quantity of substanceVSReliability

Solution Approach 1:

The patent applies parameter changes by modifying the chemical structure of retinoid compounds through specific substitutions at defined positions (R1, R2, R3, R4, R5, R6, R7, R8) with various groups including hydrogen, halogen, alkyl, alkoxy, and heterocyclic groups. These structural parameter changes enhance the compounds' ability to inhibit RBP4-TTR binding, thereby achieving superior RBP4-lowering action and reliable therapeutic effectiveness for diabetes treatment.

Inventive Principle:
Principle #35Parameter changes

2Quantity of substance

If fenretinide is used to inhibit RBP4-retinol binding, then blood RBP4 concentration is lowered, but the compound lacks sufficient selectivity and potency for optimal therapeutic use

Engineering Contradiction:
Improveblood RBP4 concentrationVSAvoidbinding inhibition specificity
Core Design Contradiction:
Quantity of substanceVSManufacturing precision

Solution Approach 1:

The patent applies local quality by introducing specific substituents at defined positions on the retinoid molecular structure. Each position (R1-R8) can be independently substituted with specific groups to optimize local interactions with the RBP4 binding site. This localized modification enhances binding inhibition specificity while maintaining the ability to lower blood RBP4 concentration effectively.

Inventive Principle:
Principle #3Local quality

3Ease of manufacture

If a compound structure is simplified for ease of synthesis, then manufacturing becomes easier, but the RBP4-lowering activity and therapeutic potential are reduced

Engineering Contradiction:
Improvecompound synthesis difficultyVSAvoidRBP4-lowering activity
Core Design Contradiction:
Ease of manufactureVSQuantity of substance

Solution Approach 1:

The patent applies segmentation by dividing the complex retinoid molecule into distinct functional regions with specific substitutable positions (R1-R8). This modular structure allows independent optimization of each position to balance synthetic accessibility with biological activity. The segmented approach enables systematic structure-activity relationship studies while maintaining ease of manufacture through standardized substitution patterns.

Inventive Principle:
Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

These compounds demonstrate a superior RBP4-lowering action, providing a prophylactic or therapeutic agent for diabetes and related conditions by improving insulin sensitivity and correcting hyperglycemia.

Implementation Method 1

compounds represented by formula (I) or their salts/prodrugs, which inhibit the binding of RBP4 and retinol, thereby preventing the formation of a complex with Transthyretin

Methodology Applied
Scientific EffectMolecular binding inhibition:

Data Source

PatentUS9487509B2Heterocyclic compound
Publication Date: 2016.11.08 TAKEDA PHARMA CO LTD
  • US9487509B2 patent drawing
  • US9487509B2 patent drawing
  • US9487509B2 patent drawing

AI summary

The present invention relates towherein each symbol is as defined in the specification. The compound of the present invention has a superior RBP4-lowering action, and is useful as a medicament for the prophylaxis or treatment of disease and condition mediated by increased RBP4.