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Published on: March 2, 2012
M13 bacteriophage purification using poly(ionic liquids) as alternative separation matrices
Maria João Jacinto1, David J S Patinha2, Isabel M Marrucho3
1iBB-Institute for Bioengineering and Biosciences, Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal.
Abstract:
M13 is a filamentous, non-lytic bacteriophage that infects Escherichia coli via the F pilus. Currently, phage M13 is widely used in phage display technology and bio-nanotechnology, and is considered a possible antibacterial therapeutic agent, among other applications. Conventional phage purification involves 5-7 operational steps, with high operational costs and significant product loss (approximately 60%). In this work, we propose a scalable purification process for M13 bacteriophage using a novel stationary phase based on a polymeric ionic liquid (PIL) with a positively charged backbone structure. Poly (1-vinyl-3-ethyl imidazolium bis(trifluoromethylsulfonyl) imide) - poly(VEIM-TFSI) predominantly acted as an anion exchanger under binding-elution mode. This revealed to be a rapid and simple method for the recovery of phage M13 with an overall separation yield of over 70% after a single downstream step. To the best of our knowledge, PILs have never been used as separation matrices for biological products and the results obtained, together with the large number of cations and anions available to prepare PILs, illustrate well the large potential of the proposed methodology.
Insights
Researchers developed a new method using polymeric ionic liquids (PILs) to purify M13 bacteriophage. This efficient process significantly improves yield and reduces steps compared to traditional methods.
Area of Science:
- Biotechnology
- Materials Science
- Virology
Background:
- M13 bacteriophage is crucial for phage display, bio-nanotechnology, and potential therapeutics.
- Conventional M13 purification is costly, labor-intensive, and results in substantial product loss (approx. 60%).
Purpose of the Study:
- To develop a scalable and efficient purification process for M13 bacteriophage.
- To introduce polymeric ionic liquids (PILs) as novel separation matrices for biological products.
Main Methods:
- A novel stationary phase utilizing a positively charged polymeric ionic liquid (PIL), poly(1-vinyl-3-ethyl imidazolium bis(trifluoromethylsulfonyl) imide) (poly(VEIM-TFSI)), was synthesized.
- The PIL was employed as an anion exchanger in a binding-elution mode for M13 bacteriophage purification.
Main Results:
- The proposed method achieved a rapid and simple recovery of M13 bacteriophage.
- An overall separation yield exceeding 70% was obtained in a single downstream processing step.
- This represents a significant improvement over conventional multi-step purification methods.
Conclusions:
- Polymeric ionic liquids (PILs) demonstrate significant potential as effective separation matrices for biological products like M13 bacteriophage.
- The developed PIL-based purification method offers a scalable, cost-effective, and high-yield alternative to traditional techniques.
- This work highlights the novelty of using PILs in bioseparations and their broad applicability due to tunable properties.
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