Constitutive IDO expression in human cancer is sustained by an autocrine signaling loop involving IL-6, STAT3 and the AHR

// Ulrike M. Litzenburger 1,2,* , Christiane A. Opitz 1,2,3,* , Felix Sahm 2,4,5 , Katharina J. Rauschenbach 1,2 , Saskia Trump 6 , Marcus Winter 6 , Martina Ott 1,2 , Katharina Ochs 1,2 , Christian Lutz 7 , Xiangdong Liu 8 , Natasa Anastasov 9 , Irina Lehmann 6 , Thomas Höfer 10 , Andreas von Deimling 4,5 , Wolfgang Wick 1,11 , and Michael Platten 1,2 1 Department of Neurooncology, Neurology Clinic and National Center for Tumor Diseases...