title: TMEM43/LUMA is a key signaling component mediating EGFR-induced NF-κB activation and tumor progression.
abstract: Epidermal growth factor receptor (EGFR) family members play pivotal roles in cell proliferation, differentiation and survival. Overexpression and mutations of EGFRs, or aberrant EGFR signaling are commonly associated with the development of various cancers, where constitutive NF-κB activation is often found to promote the expression of various proteins involved in the proliferation, survival, migration and epithelial-to-mesenchymal transition of cancer cells. However, the mechanism of EGFR-induced NF-κB activation is not fully defined. Here, we used a Bimolecular Fluorescence Complementation-based functional genomics method to perform a high throughput screening and identified TMEM43/LUMA as a critical component in EGFR signaling network, mediating EGFR-induced NF-κB activation. Our data show that EGFR recruits TMEM43 following EGF stimulation. TMEM43 interacts with the scaffold protein CARMA3 and its associating complex to induce downstream NF-κB activation, and plays a critical role in controlling cell survival. TMEM43 deficiency significantly affects colony formation, survival of anoikis-induced cell death, migration and invasion of cancer cells in vitro, as well as tumor progression in vivo. Importantly, higher expression of TMEM43 closely correlates with brain tumor malignancy, and suppression of TMEM43 expression in brain tumor cells inhibited their growth both in vitro and in vivo. Altogether, our studies reveal a crucial link of EGF receptor to NF-κB activation and tumor progression.
authors.affiliation: Department of Molecular and Cellular Oncology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA.
authors.forename: C
authors.initials: C
authors.lastname: Jiang
authors.affiliation: Department of Molecular and Cellular Oncology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Department of Molecular and Cellular Oncology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: Department of Neurosurgery, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
authors.forename: J
authors.initials: J
authors.lastname: Gumin
authors.affiliation: Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Bengtsson
authors.affiliation: Department of Molecular and Cellular Oncology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA.
authors.forename: W
authors.initials: W
authors.lastname: Wu
authors.affiliation: Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Songyang
authors.affiliation: Department of Neurosurgery, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
authors.forename: F F
authors.initials: FF
authors.lastname: Lang
authors.affiliation: Department of Molecular and Cellular Oncology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA.|Institute for Immunology, Department of Basic Medical Sciences, Tsinghua University School of Medicine, Beijing, China.
authors.forename: X
authors.initials: X
authors.lastname: Lin
mesh_terms: D000818:Animals; D053468:CARD Signaling Adaptor Proteins / Q000378:metabolism; D045744:Cell Line, Tumor; D002465:Cell Movement / Q000235:genetics; D049109:Cell Proliferation; D002470:Cell Survival; D004195:Disease Models, Animal; D018450:Disease Progression; D066246:ErbB Receptors / Q000378:metabolism*; D005260:Female; D015870:Gene Expression; D055785:Gene Knockdown Techniques; D023281:Genomics / Q000379:methods; D064593:Heterografts; D006801:Humans; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D016328:NF-kappa B / Q000378:metabolism*; D009369:Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000401:mortality / Q000473:pathology*; D011379:Prognosis; D011485:Protein Binding; D015398:Signal Transduction; D047368:Tumor Burden
chemical_list: D053468:CARD Signaling Adaptor Proteins; C430880:CARD10 protein, human; D008565:Membrane Proteins; D016328:NF-kappa B; C528696:TMEM43 protein, human; D066246:ErbB Receptors