Exosomes in Tumor Angiogenesis.

Exosomes are small vesicles ranging in size between 30 and 150 nm, derived from the luminal membranes of the endosome and are constitutively released by fusion with the cell membrane. Several studies have revealed that exosomes play crucial roles in mediating local and systemic cell communication through the horizontal transfer of information in the form of nucleic material and proteins. This is particularly relevant in the context of the tumor-microenvironment cross talk. Here we describe the method of isolating exosomes and their role in modifying the tumor environment and more specifically in enabling metastasis and promoting angiogenesis.