Self‐assembly of lipid rafts revealed by fluorescence correlation spectroscopy in living breast cancer cells

摘要： In the study, imaging this polarisation Lipids and proteins in the plasma membrane are laterally heterogeneous and formalised as lipid rafts featuring unique biophysical properties. However, self-assembly mechanism of lipid raft cannot be revealed even its physical properties and components were determined in specific physiological two-photon processes. generalised and fluorescence correlation spectroscopy were used to study the fusion of lipid rafts through the membrane phase and the lateral diffusion of lipids in living breast cancer cells. A self-assembly model of lipid rafts and lipid associated with to phase was membrane demonstrate the lipid sorting ability of lipid rafts in the plasma membrane. The results showed that the increased proportion of slow subdiffusion of GM1-binding cholera toxin B-subunit (CT-B) is accompanied with an increased liquid-ordered domain during the β-estradiol-induced fusion of lipid rafts. And slow subdiffusion of CT-B was vanished with the depletion of lipid rafts. Whereas the dialkylindocarbocyanine (DiIC18) diffusion was not specifically regulated by lipid rafts. This study will open up a new insight for uncovering the self-assembly of lipid rafts in specific pathophysiological processes.