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  2. Blocking the angiopoietin-2-dependent integrin β-1 signaling axis abrogates small cell lung cancer invasion and metastasis

Blocking the angiopoietin-2-dependent integrin β-1 signaling axis abrogates small cell lung cancer invasion and metastasis

  • JCI Insight. 2024 May 22;9(10):e166402. doi: 10.1172/jci.insight.166402.
Lydia Meder 1 2 Charlotte Isabelle Orschel 2 3 4 Christoph Julius Otto 2 3 4 Mirjam Koker 3 4 Johannes Brägelmann 2 4 5 Meryem S Ercanoglu 6 Sabrina Dähling 6 Anik Compes 2 3 4 Carolin Selenz 3 4 Marieke Nill 3 4 Felix Dietlein 7 8 Alexandra Florin 9 Marie-Lisa Eich 9 Sven Borchmann 3 10 11 12 Margarete Odenthal 4 9 Raquel Blazquez 13 Frank Hilberg 14 Florian Klein 6 Michael Hallek 3 4 12 Reinhard Büttner 4 9 12 H Christian Reinhardt 15 Roland T Ullrich 2 3 4 12
Affiliations

Affiliations

  • 1 Friedrich-Alexander-Universität Erlangen-Nürnberg, Faculty of Medicine, Department of Experimental Medicine 1, Erlangen, Germany.
  • 2 Mildred Scheel School of Oncology and.
  • 3 Department I of Internal Medicine, University of Cologne, Faculty of Medicine at the University Hospital Cologne, Cologne, Germany.
  • 4 Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany.
  • 5 Department of Translational Genomics and.
  • 6 Institute of Virology, Laboratory of Experimental Immunology, University of Cologne, Faculty of Medicine at the University Hospital Cologne, Cologne, Germany.
  • 7 Department of Medical Oncology, Dana-Faber Cancer Institute, Boston, Massachusetts, USA.
  • 8 Cancer Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA.
  • 9 Institute for Pathology, University of Cologne, Faculty of Medicine at the University Hospital Cologne, Cologne, Germany.
  • 10 Else Kröner Forschungskolleg Clonal Evolution in Cancer, University Hospital Cologne, Cologne, Germany.
  • 11 German Hodgkin Study Group, Department I of Internal Medicine, University Hospital Cologne, Cologne, Germany.
  • 12 Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Faculty of Medicine at the University Hospital Cologne, Cologne, Germany.
  • 13 University Hospital Regensburg, Department of Internal Medicine III, Hematology and Medical Oncology, Regensburg, Germany.
  • 14 Department of Pharmacology, Boehringer Ingelheim RCV GmbH & Co KG, Vienna, Austria.
  • 15 Department of Hematology and Stem Cell Transplantation, West German Cancer Center, University Hospital Essen, German Cancer Consortium (DKTK), Essen, Germany.
Abstract

Small cell lung Cancer (SCLC) is the most aggressive lung Cancer entity with an extremely limited therapeutic outcome. Most patients are diagnosed at an extensive stage. However, the molecular mechanisms driving SCLC invasion and metastasis remain largely elusive. We used an autochthonous SCLC mouse model and matched samples from patients with primary and metastatic SCLC to investigate the molecular characteristics of tumor metastasis. We demonstrate that tumor cell invasion and liver metastasis in SCLC are triggered by an Angiopoietin-2 (ANG-2)/Integrin β-1-dependent pathway in tumor cells, mediated by focal adhesion kinase/Src kinase signaling. Strikingly, CRISPR-Cas9 KO of Integrin β-1 or blocking Integrin β-1 signaling by an anti-ANG-2 treatment abrogates liver metastasis formation in vivo. Interestingly, analysis of a unique collection of matched samples from patients with primary and metastatic SCLC confirmed a strong increase of Integrin β-1 in liver metastasis in comparison with the primary tumor. We further show that ANG-2 blockade combined with PD-1-targeted by anti-PD-1 treatment displays synergistic treatment effects in SCLC. Together, our data demonstrate a fundamental role of ANG-2/Integrin β-1 signaling in SCLC cells for tumor cell invasion and liver metastasis and provide a potentially new effective treatment strategy for patients with SCLC.

Keywords

Lung cancer; Oncology.

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