CD109 and cancer: Crystal violent staining demonstrated that significantly higher number of cells passed through the matrigel coated membrane, as 57.3% invasive cells were detected when cancer cells were treated with CM derived from hBM-MSCs transfected with CD109-specific siRNA, while only 27.3% and 28.7% invasive cells were detected in cells treated from un-transfected hBM-MSCs and from hBM-MSCs transfected with Control siRNA, respectively.