Scientists at the Centre for Cell Dynamics, School of Biological and Behavioural Sciences, Queen Mary University of London, in collaboration with Carl Zeiss, have introduced a groundbreaking live-cell imaging method that merges a remarkable 60-nanometer resolution with fluorescence recovery after photobleaching, while notably minimizing light-induced harm to cells. This pioneering technique enables researchers to observe intricate cellular processes with unparalleled clarity, offering new insights into fundamental biological mechanisms like DNA repair and chromosome dynamics and potentially revolutionizing drug screening methods that surpass the diffraction limit of conventional systems.
The team, under the guidance of Professor Viji Draviam, combined Lattice Structured Illumination Microscopy (diSIM/SIM²) with Fluorescence Recovery After Photobleaching (FRAP) to develop the innovative FRAP-SR (FRAP in Super-Resolution regime) method. Unlike traditional microscopy and previous super-resolution techniques that often caused cellular stress due to phototoxicity, this new approach allows the visualization of structures as small as 60 nanometers within live cells. Through FRAP-SR, the researchers explored the dynamics of 53BP1, a crucial protein involved in double-strand DNA break repair, revealing the complex liquid-like condensates formed by this protein and indicating functional specialization within these repair centers.
Professor Draviam emphasizes the transformative potential of FRAP-SR in dissecting the dynamic architecture of protein assemblies at the nanoscale in living cells, providing unprecedented insights into fundamental cellular processes while minimizing disturbance. This innovation is poised to impact fields such as optogenetics in the super-resolution realm and aid in the development of new anti-cancer drugs targeting dynamic DNA damage repair pathways. Furthermore, this advancement offers immense promise for researchers studying light-sensitive processes like DNA damage response, chromosome organization, mitochondrial dynamics, and cellular senescence, enabling high-resolution investigations without causing cellular damage and accelerating discoveries in these areas.
The research funded by UK Research and Innovation (UKRI) and Queen Mary University of London, supported by a £2.1 million grant, has led to the establishment of the state-of-the-art Centre for Cell Dynamics, offering cutting-edge resources to the broader UK scientific community. The study, facilitated by the ZEISS Elyra 7 system with FRAP capabilities from Rapp OptoElectronics, underscores the importance of advanced super-resolution imaging tools in unraveling the intricate details of cellular processes. By leveraging the FRAP-SR method, researchers can exploit the DNA damage marker 53BP1 in live cells to hasten the development of novel DNA repair drugs, especially relevant to personalized medicine, aligning with the growing global DNA repair drugs market expected to reach USD 13.97 billion by 2030.
In summary, the integration of FRAP-SR into live-cell imaging represents a significant advancement in the field, offering researchers a powerful tool to investigate cellular processes at the nanoscale with unprecedented detail and minimal disruption. This innovative approach not only expands our understanding of fundamental biological mechanisms but also holds promise for accelerating drug development and personalized medicine by enabling precise visualization of dynamic protein assemblies within living cells, paving the way for transformative discoveries in cell biology and beyond.
Key Takeaways:
– FRAP-SR combines super-resolution microscopy techniques with fluorescence recovery after photobleaching, enabling high-resolution live-cell imaging with minimal cellular damage.
– The method allows for the visualization of cellular structures as small as 60 nanometers, offering insights into dynamic processes like DNA repair and protein assembly.
– FRAP-SR has the potential to revolutionize drug screening methods by surpassing diffraction limits and providing detailed information on protein dynamics within live cells.
– The collaboration between Queen Mary University of London, Carl Zeiss, and Rapp OptoElectronics, supported by UKRI funding, has led to the establishment of a cutting-edge research facility and significant advancements in live-cell imaging technology.
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