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MiR-127 and miR-376a act as tumor suppressors by in vivo targeting of COA1 and PDIA6 in giant cell tumor of bone

Giant cell tumors of bone (GCTB) are generally benign bone tumors associated with expansive osteolytic defects, a high rate of recurrence and potential malignant transformation. We recently observed silencing of miR-127-3p and miR-376a-3p in GCTB and identified COA1 and PDIA6 as their target genes....

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Main Authors: Herr, Ingrid (Author) , Sähr, Heiner (Author) , Zhao, Zhefu (Author) , Yin, Libo (Author) , Omlor, Georg (Author) , Lehner, Burkhard (Author) , Fellenberg, Jörg (Author)
Format: Article (Journal)
Language:English
Published: 2017
In: Cancer letters
Year: 2017, Volume: 409, Pages: 49-55
ISSN:1872-7980
DOI:10.1016/j.canlet.2017.08.029
Online Access:Verlag, Volltext: http://dx.doi.org/10.1016/j.canlet.2017.08.029
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0304383517305165
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Author Notes:Ingrid Herr, Heiner Sähr, Zhefu Zhao, Libo Yin, Georg Omlor, Burkhard Lehner, Jörg Fellenberg
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Summary:Giant cell tumors of bone (GCTB) are generally benign bone tumors associated with expansive osteolytic defects, a high rate of recurrence and potential malignant transformation. We recently observed silencing of miR-127-3p and miR-376a-3p in GCTB and identified COA1 and PDIA6 as their target genes. Here, we investigate the impact of these microRNAs and their target genes on tumor engraftment and progression of giant cell tumor stromal cells (GCTSC) in vivo by xenotransplantation on the chorioallantoic membrane of chicken eggs. Prior to transplantation, the neoplastic GCTSCs were transfected with miRNA mimics or siRNAs directed against their target genes. Restoration of miR-127-3p and miR-376a-3p reduced the tumor take rate to 17% and 47% compared to 95% in the controls. The tumor volumes were significantly reduced to 29% by both miRNAs. Silencing of COA1 and PDIA6 significantly decreased the tumor volumes to 37.7% and 42.7%, while the tumor take rates remained stable. Our results indicate that re-expression of miR-127-3p and miR-376a-3p induces a strong tumor suppressor effect in GCTSC, which is partially mediated via COA1 and PDIA6.
Item Description:Available online 1 September 2017
Gesehen am 08.06.2018
Physical Description:Online Resource
ISSN:1872-7980
DOI:10.1016/j.canlet.2017.08.029

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