Recombinant Cells Expressing Alpha6 Nicotinic Receptors
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Solution Overview
Problem
Current drug discovery efforts are hindered by the inability to robustly express α6-containing nicotinic acetylcholine receptors (nAChRs) in recombinant systems, which are essential for modulating the mesolimbic dopamine system to treat mood disorders.
Innovation Solution
The development of isolated recombinant cells that express α6-containing nAChRs, specifically by co-expressing heterologous nucleic acids encoding the α6 subunit and other necessary subunits, along with chaperone proteins like BARP, SULT2B1, LAMP5, CHAT, and NACHO, to enhance expression and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If α6-containing nAChRs are expressed in recombinant systems, then functional assessment for drug discovery becomes possible, but robust expression is not achieved
Solution Approach 1:
The patent segments the expression system into multiple components: α6 subunit, β2 subunit, β3 subunit, and several chaperone proteins (BARP, SULT2B1, LAMP5, NACHO, CHAT). Each component is encoded by separate heterologous nucleic acids that are co-expressed in the recombinant cell, allowing systematic optimization of each element's contribution to overall receptor expression and function.
Solution Approach 2:
The patent introduces chaperone proteins as intermediary molecules that facilitate the proper folding, assembly, and trafficking of the α6-containing nAChR complex. These chaperones (BARP, SULT2B1, LAMP5, NACHO, CHAT) act as mediators between the synthesized receptor subunits and their functional membrane localization, enabling robust expression that would otherwise not be achieved.
2Reliability
If multiple heterologous nucleic acids are co-expressed to form functional nAChR complex, then functional assessment becomes possible, but system complexity increases
Solution Approach 1:
The patent merges multiple heterologous nucleic acids (encoding α6, β2, β3 subunits and chaperone proteins) into a coordinated expression system within a single recombinant cell type. This combining approach allows all necessary components to be produced simultaneously in the same cellular environment, simplifying the overall system compared to using multiple separate expression systems.
Solution Approach 2:
The recombinant cell system is designed to perform multiple functions simultaneously: expressing nAChR subunits, providing chaperone assistance for proper folding and assembly, trafficking the complex to the membrane, and enabling functional drug screening. This multi-functionality reduces the need for separate specialized systems for each step of the process.
Data Source
AI summary
Disclosed herein are isolated recombinant cells for the expression of α6 containing nicotinic acetylcholine receptors (nAChR) and methods of use thereof.