we thank all the members of the cytoskeleton and cancer group and our collaborators , who collectively participated to the original manuscripts . this work was supported by grants from anr-13-jjc - jsv10005 , la ligue nationale contre le cancer and fondation arc pour la recherche sur le cancer . v.m . is supported by funding from  equipe labellise ligue nationale contre le cancer 2011 .
accumulation of type i collagen fibrils in tumors is associated with an increased risk of metastasis . 
 we recently demonstrated that the collagen sensor discoidin domain receptor 1 ( ddr1 ) interacts with type i collagen fibrils to allow proteolysis - based cancer cell invasion through the formation of a new class of invadosomes , termed linear invadosomes .