ORAI1 and posterior cortical atrophy: Furthermore, the study by Dubois and colleagues has demonstrated that Orai1/Orai3 heteromers promote proliferation following stimulation of M3 muscarinic receptors (M3-AChR) [44], thus further investigations are needed to evaluate if PCa progression mediated by parasympathetic cholinergic fibers is at least partly due to Orai1/Orai3 heteromers.