has_participant has participant positive regulation of cell population proliferation regulation of cell population proliferation positive regulation of smooth muscle cell proliferation activation of smooth muscle cell proliferation GO:0048661 up regulation of smooth muscle cell proliferation positive regulation of SMC proliferation stimulation of smooth muscle cell proliferation upregulation of smooth muscle cell proliferation up-regulation of smooth muscle cell proliferation Any process that activates or increases the rate or extent of smooth muscle cell proliferation. biological_process tumor necrosis factor (human) interleukin-6 receptor subunit alpha (human) fibroblast growth factor 2 (human) platelet-derived growth factor receptor beta (human) serine/threonine-protein kinase mTOR (human) nuclear receptor subfamily 4 group A member 3 (human)