Colominic acid sodium salt is widely used in biomedical research due to its role as a mimic of polysialic acid, a naturally occurring carbohydrate polymer. It is particularly valuable in studying cell adhesion, neural development, and immune system modulation. Researchers utilize it to investigate the interactions between polysialic acid and proteins, such as neural cell adhesion molecules (NCAM), which are critical in brain development and plasticity. Additionally, it serves as a tool in the development of vaccines and drug delivery systems, where polysialic acid coatings can enhance the stability and targeting of therapeutic agents. Its application also extends to the study of bacterial virulence, as polysialic acid is a component of certain bacterial capsules, aiding in understanding host-pathogen interactions.