It is notable that MSC have antitumor activity when they are engulfed by cancer cells.34 The MSC secretome is known to be regenerative and modulate cancer cell activity.35 The secretome of MSC isolated from various tissues may diverge, but it is known to include cytokines such as TGFb, VEGF, IL-6, and more.35 This suggests that the total cargo of exosomes likely increases cell migration in a concerted manner. Here, TGFB1 is linked to cancer.