Citation
- Authors: Fan C. et al.
- Year: 2022
- Journal: J Cell Biol 221 e202109168
- Applications: in vitro / DNA / jetOPTIMUS
- Cell type: L929
Method
Mouse fibroblast L929 cells, normal rat kidney epithelial cells (NRK cells), and human stomach (gastric) cancer MGC803 cells were kindly given by Dr. Li Yu (Tsinghua University, China). 293T cells were kindly given by Dr. Jing Zhong (Institute Pasteur of Shanghai, Chinese Academy of Sciences, China). All cells were maintained in high glucose (4.5 g/l) DMEM (06-1055-57-1A; Biological Industries) supplemented with 10% FBS (10270-106; Gibco), 100 U/ml penicillin, 100 µg/ml streptomycin, and 4 mM L-glutamine (complete DMEM) at 37°C in a humidified atmosphere with 5% CO2. Transient transfections were performed with JetPrime (Polyplus-transfection) according to the manufacturer’s instructions using a DNA:JetOPTIMUS ratios of 1:1.25 and 24-h incubation per assay.
Abstract
Migrasomes are recently discovered vesicle-like structures on retraction fibers of migrating cells that have been linked with transfer of cellular contents, shedding of unwanted materials, and information integration. However, whether and how the cell migration paradigm regulates migrasome formation is not clear. Here, we report that there are significantly fewer migrasomes in turning cells compared with straight persistently migrating cells. The major insight underlying this observation is that as the cells elongate, their rear ends become narrower, subsequently resulting in fewer retraction fibers during impersistent migration. In addition to migration persistence, we reveal that migration speed positively corelates with migrasome formation, owing to the derived length of retraction fibers. Substantiating our hypothesis, genetically removing vimentin compromises cell migration speed and persistence and leads to fewer migrasomes. Together, our data explicate the critical roles of two cell migration patterns, persistence and speed, in the control of migrasome formation by regulating retraction fibers.