GRPR and cancer: Overexpression of GRPR has been reported to induce cancer cell proliferation and facilitate malignant neoplasm development (Jensen et al. 2008; Weber 2009; Cornelio et al. 2007; Hajri et al. 1996; Moody et al. 1996; Preston et al. 1995, 1994; Gugger and Reubi 1999; Markwalder and Reubi 1999; Roesler et al. 2006; Shimoda 1992; Qin et al. 1994).