Neuroactive Steroid Amides for Selective GABA A Modulation
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Solution Overview
Problem
There is a need for new compounds that act as modulators of brain excitability and are effective in treating CNS-related disorders, as existing neuroactive steroids and benzodiazepines have limitations in efficacy and specificity.
Innovation Solution
Development of 3α-hydroxy-17β-amide neuroactive steroids that selectively modulate the GABA A receptor, particularly the α4β3δ subunit composition, to treat CNS-related disorders such as depression and other conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing neuroactive steroids and benzodiazepines are used to modulate brain excitability, then therapeutic effects are achieved, but efficacy and specificity are limited
Solution Approach 1:
The patent segments the GABA A receptor into specific subunit compositions (α4β3δ) and develops compounds that selectively target this specific segmentation, rather than acting on all GABA A receptors non-specifically. This selective segmentation approach resolves the contradiction by achieving both therapeutic efficacy through targeted modulation and specificity by distinguishing between different receptor subtypes.
Solution Approach 2:
The invention applies local quality by designing compounds with specific molecular structures (3α-hydroxy-17β-amide neuroactive steroids) that interact with particular regions and subunit compositions of the GABA A receptor. This localized interaction at the α4β3δ subunit interface enables selective modulation, simultaneously achieving therapeutic effects and receptor specificity.
2Reliability
If new compounds are developed to act as GABA modulators, then therapeutic benefits for CNS disorders are achieved, but complexity of compound structure increases
Solution Approach 1:
The patent employs parameter changes by systematically modifying specific molecular parameters of the neuroactive steroid structure (such as the 17β-amide substitution pattern and 3α-hydroxy configuration) to optimize both therapeutic benefit and selectivity. These controlled parameter changes within the steroid framework achieve the desired therapeutic effects without excessive structural complexity.
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 compounds effectively modulate brain excitability and treat CNS-related disorders by enhancing or reducing neuronal activity through the GABA A receptor, providing therapeutic benefits for conditions like depression and other neurological issues.
Implementation Method 1
GABA interacts with its recognition site on the GRC to facilitate the flow of chloride ions down an electrochemical gradient of the GRC into the cell
Data Source
AI summary
Provided herein is a compound of Formula (I) or pharmaceutically acceptable salt thereof, wherein R2a, R2b, R4a, R4b, R6, R7, R11a, R11b, R16, R17, R3, R5, R19 and RX are defined herein and wherein RY represents optionally substituted heteroaryl. Also provided herein are pharmaceutical compositions comprising a compound of Formula (I) and methods of using the compounds, e.g., in the treatment of CNS-related disorders.