Source 1primary paper2026MED
Toolkit/single pass tangential flow filtration
single pass tangential flow filtration
Also known as: SPTFF
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Single pass tangential flow filtration (SPTFF) was implemented at bench scale ... At pilot scale, a multi-membrane staged SPTFF module was designed ...
Usefulness & Problems
Why this is useful
SPTFF is used here to preconcentrate clarified AAV cell lysate inline before affinity chromatography. The paper reports both bench-scale and pilot-scale SPTFF implementations for intensified downstream processing.; inline concentration of clarified AAV cell lysate before affinity chromatography; intensifying large-scale AAV downstream processing
Source:
SPTFF is used here to preconcentrate clarified AAV cell lysate inline before affinity chromatography. The paper reports both bench-scale and pilot-scale SPTFF implementations for intensified downstream processing.
Source:
inline concentration of clarified AAV cell lysate before affinity chromatography
Source:
intensifying large-scale AAV downstream processing
Problem solved
The method addresses the need to reduce load volume and increase AAV concentration before affinity capture, which in turn improves operating time, resin utilization, and overall productivity.; reducing affinity column load volume by preconcentrating clarified lysate; improving downstream productivity in AAV purification
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The method addresses the need to reduce load volume and increase AAV concentration before affinity capture, which in turn improves operating time, resin utilization, and overall productivity.
Source:
reducing affinity column load volume by preconcentrating clarified lysate
Source:
improving downstream productivity in AAV purification
Problem links
improving downstream productivity in AAV purification
LiteratureThe method addresses the need to reduce load volume and increase AAV concentration before affinity capture, which in turn improves operating time, resin utilization, and overall productivity.
Source:
The method addresses the need to reduce load volume and increase AAV concentration before affinity capture, which in turn improves operating time, resin utilization, and overall productivity.
reducing affinity column load volume by preconcentrating clarified lysate
LiteratureThe method addresses the need to reduce load volume and increase AAV concentration before affinity capture, which in turn improves operating time, resin utilization, and overall productivity.
Source:
The method addresses the need to reduce load volume and increase AAV concentration before affinity capture, which in turn improves operating time, resin utilization, and overall productivity.
Published Workflows
Objective: Design intensified AAV downstream manufacturing processes at bench and pilot scale to improve affordability and accessibility of gene therapy manufacturing.
Why it works: The workflow is expected to work because preconcentration by SPTFF reduces the volume of material loaded onto the affinity column while increasing AAV concentration in the load, which the abstract links to shorter operating time and better resin utilization.
preconcentration of clarified cell lysate before affinity chromatographycontinuous removal of cell debris during clarificationDNA removal during further clarificationclarification by tangential flow microfiltrationmembrane adsorber-based clarificationsingle pass tangential flow filtrationaffinity chromatography
Stages
- 1.Clarification(broad_screen)
This stage prepares crude AAV material for downstream concentration and capture by removing cell debris and additional impurities.
Selection: Removal of cell debris and further clarification including DNA removal.
- 2.Single-pass tangential flow filtration preconcentration(functional_characterization)
This stage preconcentrates clarified lysate before affinity chromatography to reduce load volume and increase AAV concentration entering the affinity column.
Selection: Inline volumetric concentration of clarified cell lysate while maintaining high AAV yield.
- 3.Integrated affinity capture process(confirmatory_validation)
This proof-of-concept stage tests whether upstream clarification and preconcentration translate into practical gains in the full pilot-scale affinity purification workflow.
Selection: Demonstration that linking clarification, SPTFF, and affinity chromatography improves process performance versus batch processing.
Steps
- 1.Remove cell debris using BioOptimal MF-SL tangential flow microfiltersclarification component
Continuously remove cell debris from AAV process material.
Cell debris is removed before downstream concentration so that clarified cell lysate can be fed into SPTFF.
- 2.Further clarify material and remove DNA using membrane adsorbers
Provide further clarification including DNA removal before SPTFF.
This additional clarification occurs before SPTFF because the next step explicitly uses clarified cell lysate as input.
- 3.Feed clarified cell lysate into bench-scale SPTFF cassettespreconcentration method and membrane module
Concentrate clarified AAV cell lysate inline before affinity chromatography.
SPTFF is performed after clarification because the input is clarified cell lysate and before affinity capture because preconcentration reduces the affinity column load volume.
- 4.Link clarification, SPTFF, and affinity chromatography in a pilot-scale integrated processintegrated preconcentration component upstream of affinity capture
Demonstrate pilot-scale process intensification by integrating upstream clarification and preconcentration with affinity chromatography.
This integrated proof-of-concept follows development of the clarification and SPTFF steps so the authors can test whether preconcentration improves the downstream affinity step in practice.
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete measurement method used to characterize an engineered system.
Mechanisms
single-pass concentrationsize-based retention/separationtangential flow membrane filtrationTarget processes
recombinationImplementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationimplementation constraint: payload burdenoperating role: sensor
The abstract states that SPTFF was applied to clarified cell lysate, with bench-scale use of two Pellicon XL50 cassettes carrying 100 kDa regenerated cellulose membranes and a pilot-scale multi-membrane staged module. An appropriate buffer chase was also required to achieve the reported high AAV yield.; requires clarified cell lysate input; bench-scale implementation used Pellicon XL50 cassettes with 100 kDa regenerated cellulose membranes; high yield depended on an appropriate buffer chase
The abstract does not show that SPTFF alone fully removes impurities, since host cell protein removal remained partial and additional clarification plus affinity chromatography were part of the integrated process.; host cell protein removal was partial rather than complete
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Host cell protein removal in the SPTFF processes was 48% at bench scale and 37% at pilot scale.
host cell protein removal 48 %host cell protein removal 37 %
Bench-scale and pilot-scale SPTFF systems provided 12-fold inline volumetric concentration of AAV clarified cell lysate with AAV yield greater than 99% after an appropriate buffer chase.
AAV yield 99 %inline volumetric concentration 12 fold
A pilot-scale integrated process linking clarification, SPTFF, and affinity chromatography reduced total operating time by 81%, improved affinity resin utilization by 36%, reduced raw material costs by an estimated 10%, and increased overall productivity 8.5-fold compared with an equivalent batch process.
affinity resin utilization improvement 36 %overall productivity increase 8.5 foldraw material cost reduction 10 %total operating time reduction 81 %
BioOptimal MF-SL tangential flow microfilters were used at bench scale for continuous removal of cell debris during clarification.
Approval Evidence
1 source3 linked approval claimsfirst-pass slug single-pass-tangential-flow-filtration
Single pass tangential flow filtration (SPTFF) was implemented at bench scale ... At pilot scale, a multi-membrane staged SPTFF module was designed ...
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impurity removalsupports
Host cell protein removal in the SPTFF processes was 48% at bench scale and 37% at pilot scale.
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performancesupports
Bench-scale and pilot-scale SPTFF systems provided 12-fold inline volumetric concentration of AAV clarified cell lysate with AAV yield greater than 99% after an appropriate buffer chase.
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process intensificationsupports
A pilot-scale integrated process linking clarification, SPTFF, and affinity chromatography reduced total operating time by 81%, improved affinity resin utilization by 36%, reduced raw material costs by an estimated 10%, and increased overall productivity 8.5-fold compared with an equivalent batch process.
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Comparisons
Source-stated alternatives
The paper contrasts the integrated SPTFF-enabled process with an equivalent batch process. It also places SPTFF alongside clarification and affinity chromatography rather than as a standalone replacement for those steps.
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The paper contrasts the integrated SPTFF-enabled process with an equivalent batch process. It also places SPTFF alongside clarification and affinity chromatography rather than as a standalone replacement for those steps.
Source-backed strengths
provided 12X inline volumetric concentration; maintained AAV yield above 99% after an appropriate buffer chase; enabled reduced operating time and improved affinity resin utilization in the integrated process
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provided 12X inline volumetric concentration
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maintained AAV yield above 99% after an appropriate buffer chase
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enabled reduced operating time and improved affinity resin utilization in the integrated process
Compared with chromatography
The paper contrasts the integrated SPTFF-enabled process with an equivalent batch process. It also places SPTFF alongside clarification and affinity chromatography rather than as a standalone replacement for those steps.
Shared frame: source-stated alternative in extracted literature
Strengths here: provided 12X inline volumetric concentration; maintained AAV yield above 99% after an appropriate buffer chase; enabled reduced operating time and improved affinity resin utilization in the integrated process.
Relative tradeoffs: host cell protein removal was partial rather than complete.
Source:
The paper contrasts the integrated SPTFF-enabled process with an equivalent batch process. It also places SPTFF alongside clarification and affinity chromatography rather than as a standalone replacement for those steps.
Ranked Citations
- 1.