Research Paper Volume 12, Issue 9 pp 8001—8015

Figure 1. Characterization of exosomes. (A) Representative transmission electron microscopy (TEM) image of exosomes isolated from NSCLC patients before osimertinib treatment. Scale bar: 100 nm; (B) Representative TEM image of exosomes isolated from plasma of osimertinib-resistant NSCLC patients. Scale bar: 100 nm; (C) Nanoparticle tracking analysis of the size of exosomes isolated from NSCLC patients before osimertinib treatment; (D) Nanoparticle tracking analysis of the size of exosomes isolated from plasma of osimertinib-resistant NSCLC patients. (E) Western blot analysis of exosomal marker CD9, CD63 and CD81. Calnexin, which is an integral protein of the endoplasmic reticulum, and GAPDH were used as negative control for identification of exosomes. Supernatant was used as control samples. OS exos: Osimertinib-sensitive exosomes; OR exos: Osimertinib-resistant exosomes.