Tecan Journal

Flexibility for speed

Maintaining a flexible approach can be difficult in biopharmaceutical research; core laboratories must balance the ability to adapt to individual project requirements with the need for efficient, high throughput processing of ever-increasing sample numbers. Novo Nordisk’s Research Bioanalysis Department has adopted a semi-automated workflow, which combines the versatility to work across the company’s various research areas with accurate and reproducible testing of thousands of samples a day.

Originally established in the early 1920s to manufacture insulin for the Nordic market, Novo Nordisk has retained a strong focus on the treatment of diabetes. Today, this expertise in protein and peptide technologies is also being used to develop products for hemophilia and other bleeding disorders, as well as growth and hormone replacement therapies.

Biopharmaceutical development and biomanufacturing rely on an in-depth understanding of the complex in vivo actions of therapeutic products to ensure their safety and efficacy. The Research Bioanalysis Department, based at Novo Nordisk’s research center in Måløv, Denmark, is responsible for investigating the pharmacokinetic and pharmacodynamic profi les of drug candidates from across the company’s research pipeline. Samples from animal or cell culture experiments are tested with a panel of 100 to 200 immunoassays to gain a thorough understanding of their activities. Around 15 years ago, the laboratory automated its ELISA procedures to increase throughput, and improve the accuracy and reproducibility of testing.

"Staff like the Fluent platform – it is completely reliable, very fast, accurate and nice to work with."

The sensitivity and convenience off ered by bead-based AlphaLISA® immunoassays have made it the technology of choice within the department, and these chemiluminescent assays now account for over 70 percent of the total immunoassay workload. Johannes Fels, Principal Scientist, explained the department’s workflow: “We have a total daily throughput of around 35,000 tests, and use a combination of fully and semi-automated set-ups to ensure rapid turnaround times, and to give us the flexibility to adapt to changing project priorities. We purchased a Fluent® Laboratory Automation Solution last year to further increase our throughput, and it is now used to perform various liquid transfers and sample dilutions as part of both our automated and semiautomated workflows. AlphaLISA is a very easy technology to run in a relatively high throughput format – there are only two reagent additions and two incubations – and so, although many of our protocols could be completely automated on the Fluent, semi-automation frees up the platform for other users to perform fast assay set-up or dilutions during the incubation steps. This way, each plate only takes two or three minutes, occupying the liquid handling workstation for just a short time.”

“A typical semi-automated AlphaLISA protocol starts with the Fluent diluting samples 10-, 20- or 40-fold from mother to daughter plates. Next, the Fluent is used to transfer samples from both mother and diluted daughter plates into a 384-well assay plate containing two replicates of each source plate. After this step, the assay plates are manually transferred to a benchtop dispenser, where assay buff er containing biotinlabeled antibodies and AlphaLISA acceptor beads is added. By running both the mother and daughter plates, we can more than double the experimental window for each assay, helping us to overcome large variations in sample or analyte concentration without performing repeat testing. Plates are incubated offl ine for one hour, and then moved back to the benchtop dispenser for addition of streptavidin donor beads, followed by another 30 minutes incubation. Finally, the plates are transferred to a reader for chemiluminescence measurements.”

“Accurate and reproducible low volume dispensing is vital to achieve reliable assay performance using this very sensitive immunoassay technology, and we worked closely with the local Tecan team to design a site acceptance test that would demonstrate the suitability of the system for our needs. We were immediately able to achieve very low CVs of 2-3 % for 1 μl plasma transfers into dry 384-well assay plates, so we were confi dent that it would perform as expected. Another nice feature is the extended volume tip adaptor, allowing us to combine four channels of the Multiple Channel Arm to perform 96-well dispensing of up to 500 μl at a time. This makes it very versatile; you can perform 100-fold dilutions in a single step, something we have not seen on any other liquid handling system.” “Staff like the Fluent platform – it is completely reliable, very fast, accurate and nice to work with – and everyone in the department runs the same set of universal scripts, simply changing the dispense volumes, dilutions, matrices and buff ers between the various assay procedures. Everything we need is programmed into the user-friendly FluentControl™ interface, and I especially like the way the liquid classes are built up within the software. Our local Tecan application scientist helped me to do the initial scripting, so we were able to get the various protocols up and running as we wanted within two weeks of delivery,” Johannes concluded.

All Tecan products mentioned are for research use only. Not for use in clinical diagnostics.

To fi nd out more about Tecan’s Fluent, visit www.tecan.com/fluent
For more information on Novo Nordisk, go to www.novonordisk.com