LIFR and endometriosis: Based on a previous study employing Notch inhibitors in endometriosis [30], we could show that the leukemia inhibitory factor receptor (LIFR) expression, a key inhibitor of cell invasion and motility, was downregulated in MSI knockdown cells both in qPCR (by more than 60%, p < 0.001, Figure 5A1) and flow cytometry analysis (p < 0.05, Figure 5A1,A2).