Somatotropinomas, but not nonfunctioning pituitary adenomas, maintain a functional apoptotic RET/Pit1/ARF/p53 pathway that is blocked by excess GDNF. - Diaz-Rodriguez E; Garcia-Rendueles AR; Ibáñez-Costa A; Gutierrez-Pascual E; Garcia-Lavandeira M; Leal A; Japon MA; Soto A; Venegas E; Tinahones FJ; Garcia-Arnes JA; Benito P; et al. (Endocrinology, 2014)