Figure 4. Examples of paracrine/endocrine actions of intravenously delivered cells.
(A) Intravenously injected cells trapped in the lungs produce TSG-6, which has anti-inflammatory actions and inhibits myocardial recruitment of Ly6G+ and Ly6C+ immune cells. This is an example of endocrine actions of transplanted cells. (B) Intravenously injected cells home to the spleen and modulate splenic inflammatory cells by secreting paracrine factors; this reduces immune cells recruitment in the myocardium.