Numerous studies have shown the crucial importance of rapid and transient activation of mitogen-activated protein kinase (MAPK, ERK) signaling for the neuroprotective actions of estradiol. Activation of MAPK signaling is accompanied by activation of cAMP response element binding protein (CREB), induction of BCL2 expression, and inhibition of the apoptotic cascade [11,12]. The rapid neuroprotective effects induced by estradiol, such as transient activation of MAPK, may involve signaling mediated by non-classical ERs. One such candidate is Gprotein-coupled receptor 30 (GPR30). Although the role of GPR30 as a putative estrogen receptor is a matter of debate, recent studies have shown that a GPR30 agonist is able to imitate neuroprotective and neuritogenic actions of estradiol on hippocampal neurons [13–15].