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Hepatoblastoma (HB) is the most common malignant liver tumor in children. High-risk patients, especially those with tumor metastasis, have poor prognosis. Serpin family E member 2 (SERPINE2) is overexpressed in a variety of tumors, especially adenocarcinoma, and promotes tumor invasion and metastasis. The function and mechanism of SERPINE2 in HB are still unclear. The purpose of this study was to investigate the potential clinical prognostic value and molecular mechanism of SERPINE2 in HB. Methods. We performed bioinformatics analyses on HB microarray data GSE131329 to study the role of SERPINE2. The expression level of SERPINE2 in HB and its clinical significance were further analyzed by quantitative real-time polymerase chain reaction (qRT-PCR), Western blot, and immunohistochemistry. After constructing the SERPINE2 overexpression and knockdown in HepG2 and HUH6 cells, the 5-ethynyl-29-deoxyuridine (EdU) assay, wound healing assay, Transwell experiment, and apoptosis assay were performed to explore the role of SERPINE2 in HB progress. Results. Upregulation of SERPINE2 was found in HB tissues and was associated with a poor prognosis. Moreover, the SERPINE2 expression was related to tumor size, vascular invasion, and tumor metastasis. The Cox regressions show that high SERPINE2 expression is an independent risk factor for HB. SERPINE2 overexpression remarkably enhanced HB cell migration and invasion and suppressed apoptosis, while knockdown of SERPINE2 exerted the opposite effect. In addition, SERPINE2 facilitated the epithelial to mesenchymal transformation (EMT) phenotype of HB cells in vitro. Conclusion. Our findings indicated that SERPINE2 accelerates HB progression, suggesting that SERPINE2 may be a potential prognostic biomarker and an underlying therapeutic target for HB.<\/jats:p>","DOI":"10.1155\/2022\/2283541","type":"journal-article","created":{"date-parts":[[2022,12,2]],"date-time":"2022-12-02T23:05:05Z","timestamp":1670022305000},"page":"1-12","source":"Crossref","is-referenced-by-count":4,"title":["Upregulation of SERPINE2 Results in Poor Prognosis of Hepatoblastoma via Promoting Invasion Abilities"],"prefix":"10.1155","volume":"2022","author":[{"given":"Guoyou","family":"Zou","sequence":"first","affiliation":[{"name":"Department of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu 610041, China"},{"name":"Department of General Surgery, People\u2019s Hospital of Tibet Autonomous Region, Tibet 850000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Lv","sequence":"additional","affiliation":[{"name":"Department of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu 610041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meng","family":"Kong","sequence":"additional","affiliation":[{"name":"Department of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu 610041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9794-6801","authenticated-orcid":true,"given":"Bo","family":"Xiang","sequence":"additional","affiliation":[{"name":"Department of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu 610041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5540-0878","authenticated-orcid":true,"given":"Jing","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu 610041, China"},{"name":"Laboratory of Pediatric Surgery, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1016\/S1470-2045(16)30598-8"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1002\/pbc.25128"},{"key":"3","doi-asserted-by":"crossref","first-page":"15330338221087830","DOI":"10.1177\/15330338221087830","article-title":"Diagnostic and prognostic value of miRNAs in hepatoblastoma: a systematic review with meta-analysis","volume":"21","author":"B. 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