Seminars & Webinars

Event: LabRoots Webinar
Date: January 24, 2024
Presenter: Marko Narobe, Sartorius BIA Separations

The downstream processing of virus particles, vesicles, RNAs, plasmids and other forms of DNA, contains multiple interdependent steps, each requiring optimization for best results. This webinar will showcase how to shorten the development time by screening multiple conditions at once, with small sample intake and process automatization. In these processes we used our newly launched CIM® monolithic plates.

The CIM® monolithic plates are a standard plate design, manufactured according to ANSI standard. In each well there is a defined amount of monolithic chromatographic media. Due to its intrinsic properties the mass flow through the monolith is convective. This enables us to have fast processes, and no shaking or incubation is required with our plates.

First, we present the screening of different mobile phases for rAAV capture step. Optimization of capture step leads to increased process productivity and product purity, as well as improves the polishing step. High vector recovery and greater reduction of impurities translate to preparative scale.

Subsequent part of the webiar focuses on the importance of finding conditions that increase dynamic binding capacity (DBC) of mRNA on Oligo dT. Screening experiments help to to identify the factors that affect the binding capacity and achieve a DBC of >6 mg/mL.

In both cases, the optimized conditions were scaled-up to preparative scale chromatography, resulting in successful implementation of screening tools for process development optimization. Watch the webinar to learn how CIM® (Convective Interaction Media) monolithic chromatography products solve challenges in DSP for gene therapy and vaccines.

Viruses & VLPs pDNA Nucleic acids Extracellular vesicles

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Speaker: Katja Vrabec, Project Manager

The development of fast and efficient processes for the isolation of extracellular vesicles (EVs) depends on the availability of chromatography media that meet the special fractionation needs of these products and analytical methods for process monitoring. Convective Interaction Media (CIM®) monolithic columns offer high binding capacities and low shear stress conditions for the purification of large biologics such as EVs. Multiple-detector PATfix™ technology was developed for monitoring sample composition and product detection in upstream and downstream processes. We will present the EV isolation process from clarified conditioned media and fractionation using CIMmultus™ chromatography columns. Testing of the raw materials, analysis of upstream samples produced in different cell lines, and analysis of downstream samples were performed using PATfix™ analytical approaches. The composition of EV populations was monitored through the detection of tetraspanins using immunofluorescent labelling and SEC analytics. High-throughput analysis of in-process samples and impurity composition was monitored using CIMac™ anion exchange columns.

Extracellular vesicles

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Presenter: Aleš Štrancar

Date: August 27, 2020

2nd Bacteriophage Therapy Summit 2020 (digital event)

Many of the most compelling applications of bacteriophages involve human therapy, some pertinent to gene therapy, others to antibiotic replacement. These applications require removal of host cell contaminants to acceptable levels, including proteins, DNA and, most of all, endotoxins. This presentation will highlight some of the challenges with effective endotoxin removal, and introduce a new chromatography product that achieves good endotoxin removal while maintaining high recovery of bacteriophage. Case study data will be shared documenting the performance of a platform purification method that enable complete bacteriophage purification within a single shift. Fast analytical methods for qualification of raw materials and tracking phages through the steps of a purification process will also be presented.

Bacteriophages