PAD1 Inhibitor Chemistry for Potency and Cell Permeability
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Solution Overview
Problem
There is an urgent need for novel therapeutics and treatment methods that provide improved clinical effectiveness with reduced side effects, particularly through safe and effective inhibition or inactivation of protein arginine deiminase 1 (PAD1), which is implicated in autoimmune diseases and certain cancers, as existing inhibitors like o-Cl-amidine exhibit poor cellular efficacy due to limited cell permeability.
Innovation Solution
Development of novel, highly selective and potent PAD1 inhibitors with iodine substitutions that form halogen bonds, enhancing potency and selectivity, along with corresponding pharmaceutical compositions and molecular probes for PAD1 detection and inhibition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing PAD inhibitors like o-Cl-amidine are used, then PAD inhibition potency is achieved, but cell permeability is limited resulting in poor cellular efficacy
Solution Approach 1:
The patent modifies the chemical parameters of PAD inhibitors by replacing the carboxylate group with a fluorinated hydrocarbon chain, changing the physical and chemical properties of the molecule to improve both potency and cell permeability simultaneously
Solution Approach 2:
The invention creates a composite molecular structure combining the amidine warhead with a fluorinated hydrocarbon chain and carboxylic acid moiety, resulting in a hybrid molecule that achieves both high PAD inhibition potency and improved cellular penetration
2Adaptability or versatility
If pan-PAD inhibitors with chloroacetamidine warhead are used, then broad PAD inhibition is achieved, but selectivity for specific PAD isozymes is reduced
Solution Approach 1:
The patent introduces specific local modifications to the inhibitor structure, including the fluorinated hydrocarbon chain and terminal carboxylic acid, which create localized interactions with specific PAD isozyme active sites to enhance selectivity while maintaining broad inhibition capability
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
The iodine-substituted PAD1 inhibitors demonstrate remarkable cellular efficacy and proteome selectivity, effectively inhibiting histone H3 citrullination in cellular models and mouse zygotes, offering potential therapeutic benefits for autoimmune diseases and cancers.
Implementation Method 1
Development of novel, highly selective and potent PAD1 inhibitors with iodine substitutions that form halogen bonds, enhancing potency and selectivity
Implementation Method 2
Cl-amidine and BB-Cl-amidine are two widely used pan-PAD inhibitors that possess a chloroacetamidine warhead that covalently modifies the active site cysteine
Data Source
AI summary
The invention provides novel inhibitors or inactivators of protein arginine deiminase 1. pharmaceutical compositions and methods of use thereof. The invention also relates to molecular probes based on such compounds and methods of use thereof.