Article
作者: Friese, Manuel A ; Mezler, Mario ; Krieg, Kim ; Klein, Christoph A ; Werner-Klein, Melanie ; Siegmund, Heiko ; Pless, Ole ; Rachad, Fatima-Zahra ; Krasemann, Susanne ; Woo, Marcel S ; Kauven, Pia ; Naber, Tobias ; Haferkamp, Undine ; Siegmund, Malte ; Evert, Katja ; Zaliani, Andrea ; Materna-Reichelt, Silvia ; Walkenhorst, Mark ; Blick, Robert ; Weller, Arjen ; Wittich, Annika ; Wegener, Joachim ; Harberts, Jann ; Miltner, Dominik ; Conze, Christian ; Gužvić, Nataša Stojanović ; Muschong, Patricia ; Zierold, Robert
Effective systemic therapies against brain metastases are severely limited. To understand and target vulnerabilities of human metastases in a brain niche context, we developed reproducible melanoma brain metastasis (MBM) models for metastasis-integrating drug screening. We co-cultured A375 melanoma cells or tumor regional lymph node-derived disseminated cancer cells (DCCs) in close proximity with human induced pluripotent stem cell-derived cortical organoids (hCOs). In these, RNA sequencing revealed an upregulation of metastasis-associated features. First, A375 cells and DCCs were screened against an anti-cancer library containing 315 compounds. Hits were ranked by neurotoxicity, central nervous system permeation, and anti-DCC efficacy. Only a minority of hits effectively targeted A375-MBMs, with the first-in-class XPO1 inhibitor selinexor emerging as top hit. Selinexor also demonstrated efficacy in DCC-MBM models and low toxicity on hCOs, suggesting a promising therapeutic window in clinically applied doses. Collectively, the MBM model provides a tool for identifying candidate therapies counteracting metastatic progression.