Multi-Angle Light Scattering for Biological Product Process Control
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Solution Overview
Problem
Current downstream processing methods for biological products face challenges in detecting and monitoring biological products and bioburden contamination, particularly in continuous processes, due to low detection specificity and background noise from UV-based methods, and the difficulty in monitoring consumable integrity and functionality in real-time.
Innovation Solution
Utilizing multi-angle light scattering (MALS) as an analytical tool for process control to efficiently, reliably, and specifically monitor biological products and bioburden contamination, and assess consumable integrity by measuring scattered light intensity at different angles, suitable for chromatography separation methods and continuous processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If UV-based detection methods are used for monitoring biological products in downstream processing, then the detection can be performed with existing equipment, but the detection specificity is low and background noise is high due to UV-absorbing amino acids in proteins, DNA, RNA, and lipids
Solution Approach 1:
The patent changes the detection parameter from UV absorbance to multi-angle light scattering (MALS) measurements. By measuring light scattering intensity at multiple angles (typically 5-15 angles from 0 to 180 degrees), the system obtains angular distribution data that is characteristic of particle size and shape, enabling specific detection of biological products like viruses, virus-like particles, vesicles, exosomes, and antibodies while distinguishing them from impurities based on their different scattering patterns.
2Productivity
If real-time detection is performed in continuous processes for process control, then productivity is improved, but measurement conditions become more complex and detection reliability decreases
Solution Approach 1:
The patent implements real-time feedback control by continuously monitoring the light scattering signal during chromatography operations. The system compares the measured scattering intensity and angular distribution against predefined thresholds and patterns to detect breakthrough events, aggregate formation, or bioburden contamination. This feedback enables automatic adjustment of process parameters such as flow rate, column pressure, and buffer composition to maintain optimal separation conditions throughout continuous operation.
Solution Approach 2:
The patent replaces complex mechanical sampling and offline analysis systems with an optical detection system that performs real-time analysis directly in the flow path. Instead of mechanically extracting samples at discrete time points for laboratory analysis, the MALS detector continuously measures light scattering properties of the flowing material, eliminating sampling artifacts and enabling true real-time process control.
3Measurement precision
If multi-angle light scattering is used for detecting biological products, then detection specificity is improved, but device complexity increases
Solution Approach 1:
The patent employs a multi-functional light scattering detection system that can simultaneously monitor multiple aspects of biological product characterization including concentration, molecular weight, particle size distribution, and shape factors. The same optical system detects breakthrough events, aggregate levels, and bioburden contamination using the angular scattering pattern data, eliminating the need for separate detection systems for each parameter.
4Ease of manufacture
If conventional detection methods are used for monitoring consumable integrity, then existing equipment can be used, but real-time monitoring capability is insufficient and product quality consistency deteriorates
Solution Approach 1:
The patent enables continuous real-time monitoring of consumable integrity throughout the entire chromatography process. By measuring light scattering properties at multiple angles continuously, the system detects changes in the optical characteristics of the flowing material that indicate consumable degradation, membrane fouling, or column equilibrium shifts. This continuous monitoring allows for real-time adjustment of process parameters to maintain consistent product quality throughout continuous operation.
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
MALS enables efficient, reliable, and specific detection of biological products and bioburden, ensuring optimal chromatography media utilization, reduced buffer consumption, and improved product quality and consistency in continuous processes.
Implementation Method 1
providing a signal from a multi-angle light scattering detector in response to light scattered by the biological product
Implementation Method 2
the feed signal and the effluent signal can be detected with devices measuring UV absorbance, pH, conductivity, light scattering, fluorescence, IR or visible light
Data Source
Figure 1
Figure 2A~2B
Figure 2C
AI summary
The present invention concerns methods for processing and/or purification of a biological product involving multi-angle light scattering as analytical tool for process control. The methods of the invention apply multi-angle light scattering to detect the biological product, the presence of a bioburden or the functionality and/or integrity of a consumable employed in the method for processing and/or purification of the biological product. Further, the invention relates to systems for processing and/or purification of a biological product configured to perform the methods of the invention. Lastly, the invention concerns computer program products which can be used in the methods of the invention.