Imaging & Microscopy

Imaging and microscopy make the otherwise invisible behaviour of chondrocytes measurable, from the organisation of the actin cytoskeleton to the architecture of the surrounding matrix [2]. High-content and single-cell imaging allow individual cells to be characterised by shape, marker expression and spatial position rather than as an averaged population [1]. Spatially resolved transcriptomic imaging of human cartilage has shown that most osteoarthritis-associated changes concentrate in the articular surface and superficial zone, information that only location-aware imaging can provide [1]. Fluorescence microscopy of F-actin, vinculin and chondrogenic markers links a cell's mechanical state to its phenotype, for example under different matrix stiffnesses [2].

Quantitative imaging also underpins biomechanical models, since the collagen and proteoglycan architecture that determines how cartilage responds to load must first be measured [3]. Combining imaging with computational modelling therefore connects structure, cell response and tissue function in a single framework [3]. Reliable, reproducible image analysis is what turns micrographs into the quantitative single-cell data on which downstream statistics depend [1]. High-content single-cell image analysis is a core method in Jessica's morpho-proteomic profiling of chondrocytes [2].