“…Six1 has been shown to regulate cellular proliferation at the G2-M checkpoint (Ford et al, 1998;Ford et al, 2000), to be over-expressed in a number of tumours (Ford et al, 1998;Li et al, 2002a;Reichenberger et al, 2005), inhibit apoptosis within ovarian tumours (Behbakht et al, 2007), and has been shown to be involved in metastasis (Yu et al, 2004). A common feature of tumour development is often the co-ordinate regulation of both cell proliferation and apoptosis, with up-regulation of the former and inhibition of the latter being central to mutation fixation and tumour growth (Roberts et al, 1995;Plant et al, 1998;Pliskova et al, 2005). It is thus interesting that GO analysis clearly shows that genes associated with both apoptotic cell death and cell cycling are affected by VPA treatment.…”