Biological Microscopy in Biological Research
Atomic Force Microscopy (AFM) can be used to study the dynamic behaviour of living or stationary cells such as erythrocytes, leukocytes, platelets, cardiomyocytes, living renal epithelial cells, and neuroglial cells. Atomic Force Microscopy (AFM) has a remarkable ability to analyse dynamic cells in vitro. Most of these studies involve placing the sample directly on the slide without staining or fixation, making the sample preparation and handling environment quite simple. Labelling of cell membranes with colloidal gold** opens the door to high-resolution localisation of cell surface antigens.
Atomic Force Microscopy (AFM) Cellular Imaging e.g.: Atomic Force Microscopy (AFM) studies of live renal epithelial cells allow observation of cytoskeletal elements, plasma membrane depressions and membrane-bound filaments on plasma membrane speckles at a resolution of 50nm. Observation of platelet motility by AFM reveals microfilament structure, transport of particles to the outer cytoplasm, and redistribution of cellular components during activation. The plasma membrane of wandering epithelial cells can be imaged in real time with an atomic force microscope (AFM). The surface cytoskeleton structure of living or fixed mammalian cells in water can be viewed with 50 nm resolution using AFM. Changes in cellular conformation can be tracked in time in living cells, and changes in cytoskeletal forces can be characterised by the introduction of ** (colchicine) induced cytoskeletal surface receptor cross-linking (binding to the IgE receptor via IgE antibody), among other things. Parpura et al. observed the movement of microfilaments under the plasma membrane of neurons and glial cells in vivo with atomic force microscopy (AFM), and proposed the concept of nanosurgery because of the intuitive, real-time, and dynamic characteristics of the images, i.e., nanoscale manual manipulation of cells to achieve the purpose of "surgery" on pathological cells. The purpose of "surgery" on pathological cells.
Application Perspectives The application of atomic force microscopy (AFM) techniques in biology depends on the study of sample preparation methods and buffers suitable for tip-sample interaction. Atomic force microscopy (AFM) is now a powerful tool for obtaining high-resolution images of the surface structure of a sample. Even more attractive is its ability to observe biochemical reaction processes and conformational changes of biomolecules. Therefore, there is no doubt that AFM has a promising future in the field of biology. As for the AFM technology itself, the following advances will further facilitate its application in biology. Most biological processes are quite fast, and the improved temporal resolution of AFM will facilitate the observation of these processes. Life science research has its own characteristics, and AFMs need to be designed for biological research. High resolution is an advantage of AFM. Its resolution can theoretically reach the atomic level, but it has not been realised yet. How to make a finer tip will help to further improve its resolution. And with the improvement of sample preparation techniques
