a. Ts cells (Group B) or their culture supernatant (Ts Sup, Group C) suppressed adoptive transfer of CS. b. Electron microscopy revealed that Nl Sup, Sham Sup and TNP-Ts Sup pellets contained nanovesicles resembling exosomes at 80,000 times magnification (the bar is 65nm). c. Nanoparticle tracking analysis (NTA) showed homogenous sized nanovesicles from control RAW cell line supernatant and from TNP-Ts Sup pellets, indicating particle size/concentration. d. Western immunoblotting showed CD9 tetraspanin expression by extracts of pellets from TNP-Ts Sup, Nl Cell Sup, Sham Sup and RAW cell line Sup, compared to control RAW cell lysate.