cy3-DSPE在红细胞膜上的稳定性及其与血清相互作用
文献资料:Surface Modification of Erythrocytes with Lipid Anchors: Structure–Activity Relationship for Optimal Membrane Incorporation, in vivo Retention, and Immunocompatibility原作者:Hanmant Gaikwad, Guankui Wang, Yue Li, David Bourne, Dmitri Simberg资料链接代码: Thus, RBCs labeled with diacyl glycerol derivative Cy3-C12 and phospholipid Cy3-DSPE showed much faster removal than stable DiI-C12. To compare the stability of different lipids in vitro, we measured the fluorescence of labeled RBCs after incubation in mouse serum for 3 h. According to Figure 5A, DiI-C18, DiI-C18:2, DiI-PEG3400Mtz, DiI-C12, Cy3-C12, and Cy3-cholesterol RBCs showed less than 15% loss in MFI at 3 h. At the same time, Cy3-DSPE RBCs showed over 60% loss of MFI. Confocal microscopy showed that Cy3-DSPE and DiI-C18 had similar uniform labeling of RBCs prior to incubation in serum (Figure 5B). After 3 h incubation in serum, there was five times more fluorescence released in serum from Cy3-DSPE RBCs than from DiI-C18 RBCs (Figure 5C). Thin layer chromatography (TLC) analysis showed the presence of intact Cy3-DSPE along with some degradation products (Figure 5D). While 3 h time incubation is shorter than the in vivo longevity of some of the lipids (Figure 3B), the data indicate the removal of the phospholipid from RBC membrane through interaction with serum.