Trace Element Control for Recombinant Glycoprotein Maturity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current methods for producing recombinant glycoproteins face challenges in effectively regulating cell growth and glycosylation, particularly in achieving desired N-glycan maturity and biomass generation, due to the complex interactions of trace elements like iron, copper, and manganese, which can be toxic at high concentrations and require tight regulation.

Innovation Solution

Adjusting the concentrations of iron, copper, and manganese in the culture medium during fermentation to specifically target biomass generation or N-glycan maturity, allowing for tailored production of mature or immature N-glycosylated glycoproteins and non-fucosylated species by optimizing trace element levels to direct cellular activity towards growth or glycoprotein production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If trace element concentrations (iron, copper, zinc, manganese) are increased to enhance cell growth and biomass generation, then productivity improves, but toxicity increases and biological homeostasis is disrupted

Engineering Contradiction:

Improvebiomass generationVSAvoidtoxicity

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by systematically varying the concentrations of trace elements (iron, copper, zinc, manganese) in the culture medium to identify optimal levels that maximize cell growth and glycoprotein production while avoiding toxic effects. Different trace element concentrations are tested to find the precise parameter settings that balance productivity and safety.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics by adjusting trace element concentrations at different stages of the fermentation process rather than maintaining static levels. The composition of the culture medium is dynamically modified to match the changing metabolic needs of cells during different growth phases, thereby optimizing biomass generation while preventing toxicity.

Inventive Principle:

Principle #15Dynamics

2Reliability

If trace element concentrations are tightly regulated to maintain biological homeostasis and avoid toxicity, then safety improves, but control complexity increases

Engineering Contradiction:

Improvebiological homeostasisVSAvoidregulation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent uses parameter changes to establish specific concentration ranges for each trace element that maintain biological homeostasis. By defining optimal parameter windows for iron, copper, zinc, and manganese levels, the patent simplifies regulation while ensuring reliability and avoiding toxic effects.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If trace element concentrations are optimized for biomass generation, then productivity improves, but glycosylation control is compromised

Engineering Contradiction:

Improvebiomass generationVSAvoidglycosylation control

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies dynamics by implementing stage-specific trace element supplementation strategies. During the growth phase, trace elements are optimized for biomass generation, while during the production phase, concentrations are adjusted to optimize glycosylation patterns. This dynamic approach allows the system to achieve both high productivity and precise glycosylation control at different time points.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent uses segmentation by dividing the fermentation process into distinct phases (growth phase and production phase) with different trace element optimization goals. This segmentation allows independent optimization of biomass generation in the first phase and glycosylation control in the second phase, resolving the contradiction between productivity and manufacturing precision.

Inventive Principle:

Principle #1Segmentation

4Manufacturing precision

If trace element concentrations are adjusted to achieve desired N-glycan maturity, then manufacturing precision improves, but productivity may be reduced

Engineering Contradiction:

ImproveN-glycan maturityVSAvoidbiomass generation

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent applies preliminary action by ensuring adequate biomass generation during the growth phase with optimized trace element concentrations before transitioning to the production phase. This preliminary biomass accumulation provides a robust cell population that can then be directed toward high-precision glycosylation without sacrificing overall productivity.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20240327890A1Modulation of cell growth and glycosylation in recombinant glycoprotein production

Publication Date: 2024.10.03 F HOFFMANN LA ROCHE INC

AI summary

The present invention relates to methods for selecting between conditions which enhance cell growth or biomass generation and conditions which affect the N-glycosylation maturity of expressed glycoprotein produced by eukaryotic cells under fermentation culture conditions. Thus, in the methods of the present invention, the glycoprotein producing cells are cultured in a medium which is tailored to a desired end result. The invention also embraces the medium and the use thereof.