YAP1 and mesothelioma: Accordingly, we used a PLCß4-expressing GIST48 cell line to explore the oncogenic function of PLCß4 in GISTs and its regulatory link to YAP1 as other possible non-amplified mechanism to increase expression in light of the recent discovery of involvement of PLCß4 in YAP1-active mesothelioma cell proliferation [9].