TRIS Buffer Stabilizes Peptides Against Aggregation
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Solution Overview
Problem
Peptides, polypeptides, and proteins tend to undergo gelation, fibrillation, or aggregation during up- and down-stream processing and purification, leading to instability and high clearance rates, which are problematic for maintaining high plasma concentrations over time.
Innovation Solution
The use of tris(hydroxymethyl)aminomethane (TRIS) as a buffering agent or additive in aqueous solutions, particularly in the presence of organic modifiers like ethanol, reduces the tendency of peptides and proteins to gel, fibrillate, or aggregate, thereby stabilizing them during processing and purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If peptides and proteins are processed at higher concentrations, then productivity is improved, but gelation and aggregation increase leading to reduced stability
Solution Approach 1:
TRIS acts as an intermediary substance that mediates between the peptide/protein and the solution environment. It forms stabilizing interactions with the peptide backbone and side chains, preventing direct self-association that leads to gelation and aggregation, thereby enabling higher concentration processing without loss of stability
Solution Approach 2:
The invention changes the chemical parameters of the solution by introducing TRIS, which alters the electrostatic and hydrogen-bonding environment. This parameter change modifies the intermolecular forces between peptide molecules, preventing gelation and aggregation while allowing higher concentrations to be processed stably
2Ease of operation
If temperature control is relaxed, then ease of operation is improved, but gelation and fibrillation increase
Solution Approach 1:
TRIS provides beforehand cushioning by pre-establishing stabilizing interactions with the peptide molecules before temperature fluctuations can induce gelation or fibrillation. This protective effect cushions against thermal stress, allowing relaxed temperature control during processing without compromising stability
3Ease of operation
If pH control is relaxed, then ease of operation is improved, but aggregation increases
Solution Approach 1:
TRIS provides beforehand cushioning against pH-induced aggregation by establishing protective interactions with the peptide molecules. This cushioning effect counteracts the destabilizing influence of pH fluctuations, allowing relaxed pH control during processing while maintaining resistance to aggregation
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
TRIS effectively stabilizes peptides and proteins, including Glucagon-Like Peptides, by reducing physical degradation and maintaining solution stability, allowing for higher concentration processing with less stringent temperature and pH control, thus enhancing the stability and longevity of the final drug product.
Implementation Method 1
The use of tris(hydroxymethyl)aminomethane (TRIS) as a buffering agent or additive in aqueous solutions
Implementation Method 2
TRIS effectively stabilizes peptides and proteins, including Glucagon-Like Peptides, by reducing physical degradation and maintaining solution stability
Data Source
AI summary
The present invention is directed to a method for reducing the onset or incidence of gelation/fibrillation/aggregation during the up- and down-stream processing and purification of peptides, polypeptides and proteins analogs and/or derivatives thereof, including Glucagon-Like Peptides (GLPs). More particularly, the present invention relates to methods of processing and purifying such peptides, polypeptides and proteins in the presence of tris(hydroxymethyl)aminomethane.