To further validate the authentic effects of RIN-1, and CB-103 as specific modulators of Notch signalling in HNSCC, a series of qPCR experiments were performed, based on the expression levels of Notch-receptors themselves, and Notch-regulated or responsive genes, including HES1, HEY1, NOTCH1, NOTCH2, NOTCH3, JAG1 and DLL1 mRNA level (Fig. 2B). The gene discussed is RIN1; the disease is head and neck squamous cell carcinoma.