Exosome Antibodies

Exosome antibodies are specialized antibodies designed to target and detect proteins associated with exosomes, which are small extracellular vesicles (30-150 nm in diameter) secreted by cells. Exosomes play a key role in intercellular communication by carrying and transferring proteins, lipids, RNA, and other molecules between cells. 

Content: Exosome antibodies can target a wide range of exosome-associated proteins, including:

• MHC Proteins (Major Histocompatibility Complex): Such as MHC class I and class II, which can be found on exosomes released by immune cells. These proteins are involved in antigen presentation and immune response, and antibodies against MHC proteins are used to study the role of exosomes in immune modulation.
• Endosomal Sorting Complex Required for Transport (ESCRT) Proteins: Including Alix and TSG101, which play key roles in the biogenesis of exosomes. Anti-ESCRT protein antibodies are used to study the mechanisms of exosome formation and release.
• Cell-Specific Markers: Exosomes often carry proteins that reflect the cell of origin, such as EpCAM (epithelial cell adhesion molecule) for epithelial cells, CD11b for myeloid cells, and LAMP1 for lysosome-associated processes. Antibodies against these markers help in identifying the cellular source of exosomes.

Applications: Exosome antibodies are widely used in various research and clinical applications, including:

• Flow Cytometry (ExoFlow): To analyze and quantify exosomes based on the presence of specific surface markers. Flow cytometry allows for the detection of exosome subpopulations and helps study their heterogeneity and changes in marker expression under different conditions.
• Western Blotting (WB): To confirm the presence of exosome-specific proteins in purified exosome samples. This technique is used to verify successful isolation and to analyze the protein composition of exosomes. Typical exosome markers detected by Western blot include CD9, CD63, and Alix.
• Importance in Diagnostics and Therapeutics: Exosomes are gaining significant interest as diagnostic biomarkers and therapeutic agents due to their ability to carry molecular cargo that reflects the physiological state of the originating cell. For instance, exosomes from tumor cells can carry oncogenic proteins and RNA, providing a non-invasive way to detect cancer.

Exosome antibodies are indispensable tools in cell biology, cancer research, and regenerative medicine. They enable the isolation and analysis of exosomes from complex samples, allowing for the study of intercellular communication, disease mechanisms, and the development of novel diagnostic and therapeutic approaches.