ACCELERATOR NEWS

OPM image data

Oblique Plane Microscopy (OPM) is a core technology for our Accelerator and we will implement OPM systems at all our partner sites. Here we present renderings of exemplar OPM image data of 3D cancer models from our consortium.

Sections of EGFR mutant mouse lung tissue treated with latest EGFR inhibitors- Sahai lab, Crick

This work aims to improve our understanding of residual disease and its microenvironment after treatment. The figure above shows a section of mouse lung tissue treated with an EGFR inhibitor imaged using the OPM system. Actin is labelled in green. The yellow-red-purple false-colour indicates the FRET ratio reported by the YPet/ECFP EKAR-EV FRET biosensor for ERK activity. The field of view shown is approximately 1.5×0.32×0.14 mm3.

Melanoma spheroids – Bakal lab, ICR

We are interested in how changes in cell size and shape drive melanoma metastasis in 3D. We aim to study this using melanoma spheroids expressing mutant NRAS (G12D) and also expressing membrane (CAAX-GFP) and nuclear (iRFP670-H2B) labels. The spheroids were cultured in reduced growth factor basement membrane extract (BME). Fifteen spheroids were imaged in the same experiment at 15 min intervals. The dOPM images above show a near-isotropic resolution in all three dimensions, which will aid the automated extraction of cell shape features for analysis.

Patient and mouse-derived colon cancer organoids – Battle lab, IRB

We aim to quantify the dynamics of cancer stem cell division and differentiation using engineered PDOs where specific marker genes are labelled to quantify the proportion of proliferating and non-proliferating stem cells. Readouts in this work include the specific markers for stem cells, LGR5-GFP and Ki67-RFP. We imaged 8 fields in a multi-well plate where the field of view was 2×0.32×0.14 mm3 and the image acquisition time was 3 minutes per field for 3 colours. The figure above shows representative data from patient-derived (well 2) and mouse-derived (well 3) organoids acquired using the OPM system .

Patient-derived glioma stem cell spheroid model – Carragher lab, CRUK Edinburgh

We are aiming to develop an automated 3D phenotypic screening assay to identify small therapeutic molecules targeting the quiescent glioma stem cell niche near the hypoxic core and not the proliferating glioma stem cells on the periphery of the spheroid. The figure above shows a fixed patient-derived glioma stem cell spheroid model expressing the FUCCI cell cycle reporter imaged using OPM.

GFP (green) nucleus – G1 phase cell cycle
Cherry (red) nucleus – S phase cell cycle
Red and green – G2/ML phase cell cycle