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Wnt inhibitory factor-1 functions as a tumor suppressor through modulating Wnt/β-catenin signaling in neuroblastoma
West China Hospital, Sichuan University, Chengdu, China.
IWest China Hospital, Sichuan University, Chengdu, China.
DWest China Hospital, Sichuan University, Chengdu, China.
West China Hospital, Sichuan University, Chengdu, China.
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2014 (Engelska)Ingår i: Cancer Letters, ISSN 0304-3835, E-ISSN 1872-7980, Vol. 348, nr 1–2, s. 12-19Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Neuroblastoma is the most common extracranial solid tumor in childhood and is associated with serious morbidity and mortality. The effective treatment of neuroblastoma remains one of the major challenges in pediatric oncology. The Wnt signaling pathway has been shown to play a significant role in the pathogenesis of adult and pediatric tumors. WIF-1 has been identified as an important Wnt antagonist which inhibits Wnt/β-catenin signaling by directly binding to Wnt proteins. However, the expression and function of WIF-1 in neuroblastoma remains unknown. The present study showed that WIF-1 was downregulated with high level promoter methylation in neuroblastoma cells, and was significantly upregulated after exposure to demethylating agent. This finding suggests that downregulation of WIF-1 was associated with its promoter methylation in neuroblastoma. To further study the potential function of WIF-1 in neuroblastoma, we constructed a plasmid that over-expressed WIF-1 and transfected the plasmid into one neuroblastoma cell line SK-N-SH. We found that restoration of WIF-1 inhibited the growth and proliferation of neuroblastoma cells in vitro. Morever, Wnt/β-catenin signaling activity and target genes expression were reduced by WIF-1 restoration. These results provide support that WIF-1 is downregulated and functions as a tumor suppressor by antagonizing Wnt/β-catenin signaling in neuroblastoma, suggesting a potential role as a therapeutic target in neuroblastoma.

Ort, förlag, år, upplaga, sidor
Elsevier, 2014. Vol. 348, nr 1–2, s. 12-19
Nyckelord [en]
Neuroblastoma, Wnt inhibitory factor-1 (WIF-1), Wnt/β-catenin signaling, Methylation
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Cancer och onkologi Cell- och molekylärbiologi
Identifikatorer
URN: urn:nbn:se:liu:diva-106900DOI: 10.1016/j.canlet.2014.02.011ISI: 000336878100002PubMedID: 24561119OAI: oai:DiVA.org:liu-106900DiVA, id: diva2:719336
Tillgänglig från: 2014-05-23 Skapad: 2014-05-23 Senast uppdaterad: 2018-01-11Bibliografiskt granskad

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