Also, the inhibitor STX64 has been investigated in intact mouse endometrial cancer xenografts and ovariectomized mouse endometrial cancer xenograft models, and in the latter case, STX64 showed significant inhibition after daily 1–10 mg/kg oral doses (Foster et al., 2008c), thus demonstrating the great potential of STS inhibitors as novel anticancer drugs. Here, STS is linked to endometrial cancer.