PMID- 29844572 OWN - NLM STAT- MEDLINE DCOM- 20190227 LR - 20190523 IS - 1476-5594 (Electronic) IS - 0950-9232 (Linking) VI - 37 IP - 37 DP - 2018 Sep TI - RANK-c attenuates aggressive properties of ER-negative breast cancer by inhibiting NF-kappaB activation and EGFR signaling. PG - 5101-5114 LID - 10.1038/s41388-018-0324-y [doi] AB - The RANK/RANKL axis emerges as a key regulator of breast cancer initiation, progression, and metastasis. RANK-c is a RANK receptor isoform produced through alternative splicing of the TNFRSF11A (RANK) gene and a dominant-negative regulator of RANK-induced nuclear factor-kappaB (NF-kappaB) activation. Here we report that RANK-c transcript is expressed in 3.2% of cases in The Cancer Genome Atlas breast cancer cohort evenly between ER-positive and ER-negative cases. Nevertheless, the ratio of RANK to RANK-c (RANK/RANK-c) is increased in ER-negative breast cancer cell lines compared to ER-positive breast cancer cell lines. In addition, forced expression of RANK-c in ER-negative breast cancer cell lines inhibited stimuli-induced NF-kappaB activation and attenuated migration, invasion, colony formation, and adhesion of cancer cells. Further, RANK-c expression in MDA-MB-231 cells inhibited lung metastasis and colonization in vivo. The RANK-c-mediated inhibition of cancer cell aggressiveness and nuclear factor-kappaB (NF-kappaB) activation in breast cancer cells seems to rely on a RANK-c/TNF receptor-associated factor-2 (TRAF2) protein interaction. This was further confirmed by a mutated RANK-c that is unable to interact with TRAF2 and abolishes the ability to attenuate NF-kappaB activation, migration, and invasion. Additional protein interaction characterization revealed epidermal growth factor receptor (EGFR) as a novel interacting partner for RANK-c in breast cancer cells with a negative effect on EGFR phosphorylation and EGF-dependent downstream signaling pathway activation. Our findings further elucidate the complex molecular biology of the RANKL/RANK system in breast cancer and provide preliminary data for RANK-c as a possible marker for disease progression and aggressiveness. FAU - Sirinian, Chaido AU - Sirinian C AD - Clinical and Molecular Oncology Laboratory, Division of Oncology, Department of Medicine, University of Patras, Patras, Greece. FAU - Papanastasiou, Anastasios D AU - Papanastasiou AD AD - Clinical and Molecular Oncology Laboratory, Division of Oncology, Department of Medicine, University of Patras, Patras, Greece. apapanasta@upnet.gr. FAU - Schizas, Michail AU - Schizas M AD - Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA. FAU - Spella, Magda AU - Spella M AD - Laboratory for Molecular Respiratory Carcinogenesis, Department of Physiology, Faculty of Medicine, University of Patras, Patras, Greece. FAU - Stathopoulos, Georgios T AU - Stathopoulos GT AUID- ORCID: 0000-0002-9215-6461 AD - Laboratory for Molecular Respiratory Carcinogenesis, Department of Physiology, Faculty of Medicine, University of Patras, Patras, Greece. FAU - Repanti, Maria AU - Repanti M AD - Department of Pathology, Patras General Hospital, Patras, Greece. FAU - Zarkadis, Ioannis K AU - Zarkadis IK AD - Department of Biology, School of Medicine, University of Patras, Patras, Greece. FAU - King, Tari A AU - King TA AD - Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA. AD - Surgical Oncology, Brigham and Women's Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA. FAU - Kalofonos, Haralabos P AU - Kalofonos HP AD - Clinical and Molecular Oncology Laboratory, Division of Oncology, Department of Medicine, University of Patras, Patras, Greece. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180529 PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (NF-kappa B) RN - 0 (RANK Ligand) RN - 0 (Receptor Activator of Nuclear Factor-kappa B) RN - 0 (Receptors, Estrogen) RN - 0 (Tnfrsf11a protein, mouse) RN - EC 2.7.10.1 (EGFR protein, mouse) RN - EC 2.7.10.1 (ErbB Receptors) SB - IM MH - Animals MH - Breast Neoplasms/*metabolism MH - Cell Line, Tumor MH - ErbB Receptors/*metabolism MH - Female MH - Gene Expression Regulation, Neoplastic/physiology MH - Humans MH - Male MH - Mice MH - Mice, Inbred NOD MH - Mice, SCID MH - NF-kappa B/*metabolism MH - RANK Ligand/metabolism MH - Receptor Activator of Nuclear Factor-kappa B/*metabolism MH - Receptors, Estrogen/*metabolism MH - Signal Transduction/*physiology EDAT- 2018/05/31 06:00 MHDA- 2019/02/28 06:00 CRDT- 2018/05/31 06:00 PHST- 2017/08/09 00:00 [received] PHST- 2018/04/21 00:00 [accepted] PHST- 2018/04/21 00:00 [revised] PHST- 2018/05/31 06:00 [pubmed] PHST- 2019/02/28 06:00 [medline] PHST- 2018/05/31 06:00 [entrez] AID - 10.1038/s41388-018-0324-y [pii] AID - 10.1038/s41388-018-0324-y [doi] PST - ppublish SO - Oncogene. 2018 Sep;37(37):5101-5114. doi: 10.1038/s41388-018-0324-y. Epub 2018 May 29.