Densely connected protein networks based on proteins which were two-fold increased or four-fold decreased in the MSC/AML-CM culture supernatants compared to AML-CM (i.e., corresponding AML cells cultured alone). Proteins with significantly altered protein abundance were imported to String for protein interaction network analysis. The protein networks were further imported to Cytoscape where the MCODE application was used to find closely connected protein networks containing at least five proteins. The GO annotations were identified by the String database. Red color indicates increased abundance in MSC/AML-CM and blue color indicates decreased abundance in MSC/AML-CM relative to AML-CM. BP, biological processes; CC, cellular compartment; Uniprot KW, Uniprot Keywords; ECM, extracellular matrix; ER, endoplasmic reticulum.