PMID- 36878305 OWN - NLM STAT- MEDLINE DCOM- 20230523 LR - 20230523 IS - 1879-260X (Electronic) IS - 0925-4439 (Linking) VI - 1869 IP - 5 DP - 2023 Jun TI - Tenascin-C affects invasiveness of EGFR-mutated lung adenocarcinoma through a putative paracrine loop. PG - 166684 LID - S0925-4439(23)00050-9 [pii] LID - 10.1016/j.bbadis.2023.166684 [doi] AB - Tenascin C (TNC) is an extracellular matrix (ECM) protein and a potential biomarker affecting progression of different tumor types, such as pancreatic and lung cancer. Alternative splicing variants of TNC are known to have an impact on interaction partners like other ECM proteins or cell surface receptors, including epidermal growth factor receptor (EGFR), leading to numerous and sometimes opposite roles of TNC in tumor cell dissemination and proliferation. Only little is known about the impact of TNC on biologic characteristics of lung cancer, such as invasion and metastatic potential. In the present study, we could link an increased expression of TNC in lung adenocarcinoma (LUAD) tissues with an unfavorable clinical outcome of patients. Furthermore, we investigated the functional role of TNC in LUAD. Immunohistochemical staining of TNC revealed a significant increase of TNC levels in primary tumours and metastases compared to normal lung tissue. Additionally, a significant correlation between TNC mRNA expression and EGFR copy number and protein expression levels has been determined. Moreover, inhibition of TNC in lung fibroblasts led to reduced invasiveness of LUAD cells harboring EGFR-activating mutations and to a shorter lamellipodia perimeter and a reduced lamellipodia area on the surface of LUAD cells. This study provides the evidence that TNC expression might be a biological relevant factor in LUAD progression in an EGFR-dependent manner and that it regulates tumor cell invasion by rearrangement of the actin cytoskeleton, especially affecting lamellipodia formation. CI - Copyright (c) 2023 Elsevier B.V. All rights reserved. FAU - Schlensog, Martin AU - Schlensog M AD - Institute of Pathology, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. FAU - Ruehlmann, Ann-Cathrin AU - Ruehlmann AC AD - Institute of Pathology, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. FAU - Haeberle, Lena AU - Haeberle L AD - Institute of Pathology, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. FAU - Opitz, Friederike AU - Opitz F AD - Institute of Pathology, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. FAU - Becher, Ann-Kathrin AU - Becher AK AD - Institute of Pathology, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. FAU - Goering, Wolfgang AU - Goering W AD - Institute of Pathology, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. FAU - Buth, Juliane AU - Buth J AD - Institute of Pathology, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. FAU - Knoefel, Wolfram Trudo AU - Knoefel WT AD - Department of General, Visceral and Pediatric Surgery, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. FAU - Ladage, Dennis AU - Ladage D AD - Department of Pneumology, Kliniken Maria Hilf GmbH, Moenchengladbach, Germany. FAU - Meyer, Andreas AU - Meyer A AD - Department of Pneumology, Kliniken Maria Hilf GmbH, Moenchengladbach, Germany. FAU - Esposito, Irene AU - Esposito I AD - Institute of Pathology, Medical Faculty of the Heinrich Heine University, Duesseldorf, Germany. Electronic address: irene.esposito@med.uni-duesseldorf.de. LA - eng PT - Journal Article DEP - 20230304 PL - Netherlands TA - Biochim Biophys Acta Mol Basis Dis JT - Biochimica et biophysica acta. Molecular basis of disease JID - 101731730 RN - EC 2.7.10.1 (EGFR protein, human) RN - EC 2.7.10.1 (ErbB Receptors) RN - 0 (Tenascin) RN - 0 (TNC protein, human) SB - IM MH - Humans MH - *Adenocarcinoma of Lung/genetics/metabolism MH - ErbB Receptors/genetics/metabolism MH - Extracellular Matrix/metabolism MH - *Lung Neoplasms/genetics/metabolism MH - Tenascin/genetics/metabolism OTO - NOTNLM OT - EGFR OT - LUAD OT - Lung cancer OT - TNC OT - cancer invasion COIS- Declaration of competing interest The authors declare no potential conflicts of interest for the following manuscript. EDAT- 2023/03/07 06:00 MHDA- 2023/05/08 10:17 CRDT- 2023/03/06 19:23 PHST- 2022/09/12 00:00 [received] PHST- 2023/01/26 00:00 [revised] PHST- 2023/02/28 00:00 [accepted] PHST- 2023/05/08 10:17 [medline] PHST- 2023/03/07 06:00 [pubmed] PHST- 2023/03/06 19:23 [entrez] AID - S0925-4439(23)00050-9 [pii] AID - 10.1016/j.bbadis.2023.166684 [doi] PST - ppublish SO - Biochim Biophys Acta Mol Basis Dis. 2023 Jun;1869(5):166684. doi: 10.1016/j.bbadis.2023.166684. Epub 2023 Mar 4.