bioengineering Article Human Mesenchymal Stem Cells Overexpressing Interleukin 2 Can Suppress Proliferation of Neuroblastoma Cells in Co-Culture and Activate Mononuclear Cells In Vitro Daria S. Chulpanova 1,2 , Valeriya V. Solovyeva 1,2 , Victoria James 3 , Svetlana S. Arkhipova 1, Marina O. ...