Do the alternated B cells and CD4+ T cells modulate metastasis in Spns2-deficient mice?
Although our understanding of metastasis-relevant miRNAs has advanced rapidly in well-studied malignancies such as breast cancer (Valastyan et al., 2009a, 2010, 2011; Yi et al., 2008), we know little about whether and how miRNAs modulate metastasis in HNSCC.
Notably, some of these miRNAs, such as miR-146a and miR-223, have also been implicated in modulating metastasis in other tumor types (Hurst et al., 2009; Li et al., 2011).
It has been assumed that demethylation of BMP6 and re-expression of this gene might modulate metastasis and invasion in breast cancer [ 34, 35].
There are some reports that ABCG2 located on the membranes of mitochondria, in perinuclear region or in nuclear as a transcription regulator to modulate the metastasis in lung cancer.
Therefore, we next investigated whether miR-16 modulates sarcoma metastasis in vivo.
For example, we recently showed that a single miRNA (miR-182) modulated sarcoma metastasis in vivo (Sachdeva et al., 2014).
The link between miRNAs and metastasis in multiple malignancies including PDAC is reported to be the ability of some miRNAs to epigenetically modulate metastasis-related gene expression and vital molecules of signaling pathways.
A role in modulating metastasis is supported by analysis of a subset of TNBC patient samples, where miR-184 was epigenetically silenced in lymph node metastases, suggesting silencing of miR-184 can promote metastatic dissemination.
Considering our finding that BMP-6-induced E-cadherin transactivation occurs indirectly, through the reduction of δEF1 expression, we speculate that overexpression of BMP-6 by breast cancer cells may represent a novel mechanism that regulates specific target genes such as E-cadherin and δEF1, in modulating metastasis and invasion of breast cancer.
Several studies have shown that VEGFR1 modulates BMDC infiltration in tumors, and that BMDCs are modulating metastasis.
