A recently disclosed Erk-induced PARP1 activation mediates the expression of immediate early genes (IEG) in response to a variety of extra- and intra-cellular signals implicated in memory acquisition, development and proliferation. Here, we review this mechanism, which is initiated by stimulation-induced binding of PARP1 to phosphorylated Erk translocated into the nucleus. Their binding maintains their long-lasting activity in a synergism, which offers a new pattern for targeted therapy.
