EMT/EMT-like processes in bioinformatics to study cancer progression First I am not sure why, but it seems EMT can be used to infer the status of cancer progression.

What kind of databases are there for the EMT process in the context of cancer? 

I saw this book which mentions ArrayExpress, but I need some help to understand what kind of data it stores. 

Are there similar/better resources? How can I use EMT in the context of cancer progression study? 


Are there other process like EMT that are being used to study cancer progression? 
Are there EMT like events in leukemia progression?
EMT describe cells' change in their state from being epithelial to the mesenchymal class. So, if a cancer cell line is gaining properties that allow it to move, it might reach the metastasis phase, were a cell can move to any point of the body and start a new tumor there.  As in the wikipedia page you linked:


  EMT has also been shown to occur in wound healing, in organ fibrosis and in the initiation of metastasis in cancer progression.


I am not aware of any kind of database for the EMT process, the most relevant resource might be the gene ontology, which has a term for it, which lists 185 (human) genes as related to this biological process.

ArrayExpress is a database of transcriptomics, it :


  stores data from high-throughput functional genomics experiments


You can evaluate the role of EMT in the data stored in the database.