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Seven tones of an Operetta – MultiPark’s new high content analysis platform

Photo of Anna and Roman doing computer analysis.
Anna Hammarberg guides the Ph.D. student Roman Sattarov on how to analyze his sample on the software.

A machine allowing researchers to rely on objective, automatized readouts instead of subjective manual counting under the microscope. Incredible pictures. And the possibility to follow live cellular events. The Operetta is the answer to these demands. The interest in using the new MultiPark infrastructure is big.

In March, MultiPark received the new Operetta CLS instrument, upgrading the former Cellomics, for high content screening and analysis. Anna Hammarberg is in charge of the platform. With her expertise and long experience in cell sorting, imaging, and analysis, she can offer practical support to MultiPark researchers that wish to use the equipment but do not yet have knowledge in how to use it. Already in April, when Perkin Elmer held an online training, the interest was substantial. During a visit to the platform, Anna demonstrated the instrument and told more about its potential. Her excitation about the opportunities with the new machine is obvious.

it provides the researcher with quantitative and reliable data so that they no longer have to rely on subjective manual counting.

“The most valuable with this system, is that it provides the researcher with quantitative and reliable data so that they no longer have to rely on subjective manual counting,” explains Anna Hammarberg.

A collage showing neurons at 40x and a quick scan at low magnification generating a heat map and dot plot of GFP intensities.
With the confocal mode, it is possible to deeply investigate neuronal maturation (left, 40x). With the fast scanning function, the Operetta rapidly provides you with heat maps and dot plots of the staining intensity in several wells (left, 5x).

With the help of machine learning, the software can correctly distinguish different structures and cells from the background. It also helps to define the lowest quantity of images you need to get a reliable analysis. While it was longtime desirable to keep a maximum stock of images, experts nowadays have realized the logistic and sustainability-related problems that come with handling unreasonable amounts of images. Hence, the software’s smart cutoff in selecting the minimum of images to keep for robust analysis, is welcomed to avoid the waste of oversampling.

The machine and software are optimized to read cell culture plates of different sizes, but with an insert it is also possible to analyze tissue samples, sliced and mounted on traditional slides for microscopy. Still, since tissue samples tend to vary more, the user may have to adjust more settings in the software manually between samples, compared to cell culture, where the settings usually are the same between experiments.

Photo of an insert for slides to the Operetta machine and an image of a sagittal section captured in the machine.
With an insert (left), it is possible to analyze tissue samples, such as the sagittal section of a mouse brain with Aβ42 deposition (right picture). Photo: Emelie Andersson.

“Since the exact application and need for hands on-support varies between researchers, I offer personalized training and guidance during regular office hours, depending on the need. At the moment, this  machine is also new to me, so during this initial phase, I will have to discover the functions together with the researchers. We have the advantage to have access to active support from application specialists at Perkin Elmer during this learning process.” says Anna. She also hints for those who are interested to contact her at least a week in advance since she is already helping several of MultiPark’s research groups. But she is eager to explore the full potential of the Operetta together with new researchers. To give some inspiration to which research questions the platform may be useful to answer, we listed a few of them below.

7 experiments you can do with the Operetta

  • Phenotypic fingerprinting: to detect subtle differences, i.e. morphological changes.
  • Complementing conventional confocal microscopy (quick and automatized imaging+analysis).
  • Live-cell assays: Following cell migration events in real-time (you can set ideal CO2 and temp), with or without fluorophores.
  • FRET: Protein-protein interactions and conformational changes can be tracked in live cells.
  • Fixed cell assays: from fluorescent widefield and confocal imaging (8 different excitation sources).
  • Co-culture systems, for example containing stem cells.
  • Study distribution and levels of intracellular proteins.

Research in progress

One researcher using the platform regularly for his Ph.D. project is Roman Sattarov in Niklas Mattsson-Carlgren’s group. His research is focused on inducing neurons from fibroblasts available in skin biopsies from Alzheimer’s disease patients.

The pictures from the Operetta are just amazing.

 

Photo of Roman Sattarov with his cell culture plate in front of the Operetta machine.
Roman Sattarov prepares his cell culture plate for analysis.

“I use the instrument to confirm that my protocol for inducing neurons works and that it is reproducible. The pictures from the Operetta are just amazing.”, tells Roman.

After inducing neurons in culture, Roman uses the Operetta to check that the induction generated branched and mature neurons. Further, the instrument can also be used to measure the levels of molecules of interest inside the cells. The long-term goal of Roman’s project is to study clinically relevant biomarkers of Alzheimer’s disease in a cellular model derived from patient samples. And for this purpose, the Operetta is highly valuable.