APES Non-Coding RNA Stabilizes Host Cell Gene Expression
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Solution Overview
Problem
Existing methods struggle to stably co-express multiple foreign genes in host cells for recombinant protein production, particularly those with similar functions or involved in the same metabolic pathways, often resulting in unstable gene expression and reduced yields of proteins like antibodies.
Innovation Solution
The use of APES (Antibody Production Enhancing Sequence), a non-coding RNA that suppresses NfkBia expression, is introduced to host cells to stabilize the expression of difficult-to-express genes, including transporters and metabolic enzymes, thereby enhancing the production of recombinant proteins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple foreign genes are transferred to host cells to improve protein production efficiency, then the yield of desired protein increases, but the stability of gene expression deteriorates
Solution Approach 1:
The patent introduces a non-coding RNA molecule as an intermediary element that mediates between multiple foreign genes and the host cell's gene expression machinery. This non-coding RNA stabilizes the expression of difficult-to-express genes (such as transporter genes and metabolic enzyme genes) by acting as a molecular scaffold or regulatory element, thereby maintaining gene expression stability while enabling co-expression of multiple foreign genes for improved protein production efficiency
Solution Approach 2:
The patent changes the molecular parameters of the host cell system by introducing specific non-coding RNA sequences that alter the expression patterns of foreign genes. By modifying the RNA landscape within the cell (adding non-coding RNA elements), the system achieves stable co-expression of multiple genes that would otherwise be incompatible, thus resolving the contradiction between productivity improvement and expression stability
2Productivity
If genes of proteins with similar functions or enzymes in the same metabolic pathway are co-expressed, then the yield of desired protein increases, but the stability of co-expression deteriorates
Solution Approach 1:
The patent employs non-coding RNA molecules as intermediary elements that specifically stabilize the co-expression of genes encoding proteins with similar functions or enzymes in the same metabolic pathway. These non-coding RNAs act as molecular mediators that prevent the instability typically observed when co-expressing functionally related genes, thereby enabling stable high-yield production of desired proteins through coordinated expression of pathway enzymes or functionally similar proteins
3Ease of manufacture
If the expression level of a gene identical to foreign genes or counterpart genes in host cells is low, then the transfer of foreign genes is easier, but the establishment of highly co-expressing cell lines becomes impossible
Solution Approach 1:
The patent applies preliminary anti-action by pre-introducing non-coding RNA molecules into the host cell system before transferring foreign genes. This preliminary step creates a molecular environment that is pre-conditioned to support high-level co-expression of multiple foreign genes, even when the host cell naturally expresses low levels of corresponding genes. The non-coding RNA acts as a pre-established molecular scaffold that prevents future expression instability, thereby enabling both easy gene transfer and high co-expression levels
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
APES enables the stable overexpression of multiple foreign genes, leading to increased yields of recombinant proteins and the establishment of cell lines with shorter doubling times, facilitating efficient recombinant protein production.
Implementation Method 1
a gene of a non-coding RNA which suppresses expression of NfkBia
Data Source
AI summary
An object of the present invention is to establish a cell line that is useful as a host cell for use in recombinant protein production, highly expresses transgenes stably, and grows stably.The present invention provides a method for establishing a cell line for recombinant protein production capable of stably expressing two or more foreign genes, comprising transferring a gene of a non-coding RNA suppressing the expression of NfkBia to a cell.