Abstract:
:In this study, we examined the role of the E-cadherin-repressed gene human Nanos1 (hNanos1) in tumor invasion process. First, our in vivo study revealed that hNanos1 mRNAs were overexpressed in invasive lung carcinomas. Moreover, hNanos1 was co-localized with MT1-MMP (membrane type 1-matrix metalloproteinase) in E-cadherin-negative invasive lung tumor clusters. Using an inducible Tet-on system, we showed that induction of hNanos1 expression in DLD1 cells increased their migratory and invasive abilities in a three-dimensional migration and in a modified Boyden chamber assay. Accordingly, we demonstrated that hNanos1 upregulated MT1-MMP expression at the mRNA and protein levels. Inversely, using an RNA interference strategy to inhibit hNanos1 expression in invasive Hs578T, BT549 and BZR cancer cells, we observed a downregulation of MT1-MMP mRNA and protein and concomitantly a decrease of the invasive capacities of tumor cells in a modified Boyden chamber assay. Taken together, our results demonstrate that hNanos1, by regulating MT1-MMP expression, plays an important role in the acquisition of invasive properties by epithelial tumor cells.
journal_name
Oncogenejournal_title
Oncogeneauthors
Bonnomet A,Polette M,Strumane K,Gilles C,Dalstein V,Kileztky C,Berx G,van Roy F,Birembaut P,Nawrocki-Raby Bdoi
10.1038/sj.onc.1211035subject
Has Abstractpub_date
2008-06-12 00:00:00pages
3692-9issue
26eissn
0950-9232issn
1476-5594pii
1211035journal_volume
27pub_type
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