The description of metastasis as an orderly sequence of basic steps local invasion, intravasation, survival in circulation, extravasation, matrix remodeling, reinitiation, and colonization has helped to rationalize the complex set of biological properties that must be acquired in order for a particular malignancy to progress toward overt metastatic disease (Vanharanta & Massague, 2013).
In vitro, the CXCL12 ligand stimulated breast cancer cells to carry out the basics of invasion, including pseudopodial protrusion, directed migration and penetration of extracellular matrix barriers.
The cascade of metastasis consists of five basic steps: (1) invasion and migration; (2) intravasation; (3) circulation; (4) extravasation; and (5) colonization, proliferation, and angiogenesis (Chamber et al. 2002; Leber and Efferth 2009).
As such, this model is a valuable new tool with which to dissect basic mechanisms of invasion and metastasis and develop new therapeutic approaches in a physiologically relevant, yet inexpensive and highly tunable, in vitro setting.
This involves the identification of the basic signs of invasion.
53 But cancer cells do not only lose epithelial properties during this process they may modify their epithelial phenotype by aberrant (de novo) expression of epithelial markers such as keratin 7. The term "epithelial-epithelial transition" has been suggested by our group for this hitherto unrecognized basic principle of invasion.
Molecular characterization of CTCs can expand our knowledge of basic molecular pathways of invasion, migration and immune surveillance and might contribute to the identification of metastatic stem cells with important implications for the development of improved therapies in the near future [ 40].
This phase has other nine main activities, which follow the basic flow of an attack (recognition, invasion, and post-invasion), previously mentioned.
In "America at the Crossroads" he claims that the invasion contradicted a basic neoconservative principle: that large social-engineering projects (ie, state-building) often lead to unexpected consequences and undermine their own ends.
This invasion of elementary basic rights of freedom of the press is not diminished by the "corrective remedial" action taken to restore the integrity and impartiality of the IRS.
