Figure 1.
Characteristics of exosomes isolated from the supernatant of Kasumi-1 (AML) cell line using differential centrifugation, ultrafiltration, size-exclusion chromatography and ultracentrifugation were studied. In A, following ultracentrifugation, exosomes were floated on a continuous sucrose density gradient, and the collected gradient fractions were tested by Western blots for CD34 and CD81. CD34+ and CD81+ exosomes were recovered at the sucrose density of 1.10–1.14 g/mL. In B, transmission electron microscopy of negatively-stained Kasumi-1 exosomes. In C, Western blots of Kasumi-1 exosomes (Kas) and exosomes isolated from plasma of a normal donor (NC). Each lane was loaded with 10µg exosomal protein. Reproduced from Hong CS, Muller L, Boyiadzis M, Whiteside TL, Isolation and characterization of CD34+ blast-derived exosomes in acute myeloid leukemia. PLoS One, 9(8), e103310 (2014) [80].