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Detection, Purification, Characterization, and Manipulation of Migrasomes
Dong Jiang1, Ying Li1, Li Yu1
1State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China.
Abstract:
Migrasomes are newly discovered cellular organelles, first described in 2015, that are formed by migrating cells. During migration, cells leave behind long membrane tethers called retraction fibers. Numerous micrometer-scale vesicles grow from the tips or junctions of these fibers, which we have named migrasomes. Migrasomes play important roles in various physiological processes, including releasing signaling factors to ensure organ morphogenesis during zebrafish embryo development, transferring mRNAs among cells, disposing of damaged mitochondria from the cell to maintain cell homeostasis, and secreting pro-angiogenic molecules to promote angiogenesis during chicken embryo development. Migrasomes are beginning to attract the attention of researchers in multiple fields. Here, we summarize the most commonly used protocols for migrasome detection using fluorescence microscopy imaging, purification through density-gradient centrifugation, characterization using electron microscopy (EM) imaging and biochemical analysis, and manipulation of migrasomes by targeting integrins and tetraspanins. © 2023 Wiley Periodicals LLC. Basic Protocol 1: Detection and observation of migrasomes by fluorescence microscopy imaging Basic Protocol 2: Purification of migrasomes from cultured cell lines and embryos by density-gradient centrifugation Basic Protocol 3: Characterization of migrasomes by electron microscopy imaging and biochemical analysis.
Insights
Migrasomes, newly discovered cellular organelles, are formed by migrating cells and play key roles in development and homeostasis. This study details protocols for their detection, purification, characterization, and manipulation.
Area of Science:
- Cell Biology
- Organelle Biology
- Developmental Biology
Background:
- Migrasomes are recently identified cellular organelles originating from migrating cells.
- They form from retraction fibers and are involved in intercellular communication and homeostasis.
- Their roles in organogenesis, mRNA transfer, and angiogenesis are increasingly recognized.
Purpose of the Study:
- To provide standardized protocols for the study of migrasomes.
- To facilitate research on migrasome function and biogenesis.
- To outline methods for detection, purification, characterization, and manipulation.
Main Methods:
- Fluorescence microscopy for migrasome detection and observation.
- Density-gradient centrifugation for migrasome purification from cell lines and embryos.
- Electron microscopy and biochemical analysis for migrasome characterization.
- Targeting integrins and tetraspanins for migrasome manipulation.
Main Results:
- Established protocols for visualizing migrasomes using fluorescence microscopy.
- Developed methods for purifying migrasomes via density-gradient centrifugation.
- Detailed techniques for characterizing migrasomes using electron microscopy and biochemical assays.
- Outlined strategies for manipulating migrasomes through specific molecular targets.
Conclusions:
- Standardized protocols are crucial for advancing migrasome research.
- These methods enable comprehensive study of migrasome biogenesis and function.
- Migrasome research holds significant potential for understanding development and disease.
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