In addition to the molecular consequences of initiating mutations, the gene expression profiles of metastatic cells may be influenced by their supporting microenvironment in target organs (Nakamura et al, 2007).
When NSCs are defective, as they are in Atm-/ mice, transplanting normal Atm+/+ NSCs may rescue impaired NSCs by restoring homeostasis to the NSCs themselves, or by stabilizing normal metabolism and redox balance in the supporting cell microenvironment.
Ultimately, the work presented by Neman and colleagues places us one step closer to successful therapeutic strategies targeting not only breast cancer cells themselves, but also the supporting brain microenvironment, with the goal of improving survival for patients with BCBM.
A reduction in the ethanol concentration in the immediate microenvironment of the organism due to the formation of a protective layer or specific adsorption of ethanol by the support may act to minimize end product inhibition.
Abnormalities in haemopoietic stem cells' (HSC) survival, proliferation and aging have been described in patients affected by RA and ascribed to abnormal support by the BM microenvironment.
Noll et al. reported that MM cells alter the microenvironment of MM by supporting the proliferation of mesenchymal stem cells through soluble factors as IL-6 [ 48].
Colon cancer induces the production of factors required for 'liver prometastatic reaction' by creating a special microenvironment supporting the colonization of hepatic sinusoidal cells by metastatic cancer cells.
The fact that cancer cells attach specifically to the capsule when they enter the lymph node strongly supports a role for capsular myofibroblasts in helping these metastatic cells establish themselves by providing a supportive microenvironment.
In neuroblastoma (Ara et al, 2009) and multiple myeloma (Mitsiades et al, 2006), IL-6 derived from stromal cells was shown to be an important mediator between cancer cells and the bone microenvironment by supporting tumour survival and affecting osteoclast differentiation, respectively.
Grunewald et al. [ 48] have shown that myeloid cells are (1) recruited to tumors, (2) "educated" by the tumor microenvironment and (3) support tumor growth by secretion of SDF-1.
