Further analysis suggests that PSMA3 and PSMA3‐AS1 are present in MM exosomes and play a unique role in delivering resistance to proteasome inhibitors (PI).[87] Additionally, icotinib‐resistant NSCLC cells produce exosomes that contain MET mRNA and transfer it to surrounding icotinib‐sensitive cells. The gene discussed is PSMA3; the disease is non-small cell lung carcinoma.