GSTM2 and cystic fibrosis: The expression of GSTM, causing a reduction in spontaneous contractility [19], was higher in DF-iPSC, while the expression of ARGBP2, playing an important role in the assembly and maintenance of myofibrils [20,21,22], and of GPR177, playing a role in regulating Wnt secretion [23], was higher in the CF-iPSCs (Figure 4A–C, p < 0.05).