In i n vitro models, however, the active synthesis of new matrix occurs independently of biomechanical loading.
The endothelial cell monolayer is one of the most commonly used in vitro models; however, it only represents a simplified view of the BBB.
These data are based only on in vitro models, however, and correlation with the in vivo situation is not always a straightforward matter.
A major disadvantage of these in vitro models, however, is that the native tissue environment is lost during cell isolation, which might affect cell behaviour [ 15].
Prior to being introduced into large clinical trials, novel combination therapies should be supported by in vitro models, however, healthy skepticism should be maintained since robust preclinical data may not always translate into meaningful clinical benefit, as illustrated by the recent disappointing results of combination trials with an FTI or an mTOR inhibitor.
However, these in vitro models are still useful to study amastigotes in simple controllable conditions.
55 One study showed that mir-143 was the most downregulated miRNA in human osteosarcoma cell lines in a mouse model; however, in vitro transfection of miR-143 decreased cell invasiveness and intravenous injection of miR-143 suppressed lung metastasis of 143B sarcoma cells in the mouse model.
Attempts to establish in vitro models were unsuccessful, however.
However, an in vitro model is necessary in order to screen large numbers of new compounds for hypnozoiticidal activity.
However, using in vitro model systems of the various stages of wound healing, such as the re-epithelialization step, would enable the identification of genetic associations using considerably fewer individual samples.
