TNF alpha-guided paracrine regulation of Leydig cell steroidogenesis by testicular interstitial macrophages. Yuting. Xiong 10027/19174 https://indigo.uic.edu/articles/thesis/TNF_alpha-guided_paracrine_regulation_of_Leydig_cell_steroidogenesis_by_testicular_interstitial_macrophages_/10834121 TNF alpha-guided paracrine regulation of Leydig cell steroidogenesis by testicular interstitial macrophages. 2014-12-04 00:00:00 Biology, Animal Physiology.