The supernatant of apoptotic cells causes transcriptional activation of hypoxia-inducible factor–1α in macrophages via sphingosine-1-phosphate and transforming growth factor-β
Barbara Herr, Jie Zhou, Christian Werno, Heidi Menrad, Dmitry Namgaladze, Andreas Weigert, Nathalie Dehne, and Bernhard Brüne