In conclusion, we synthetized and evaluate both in vitro and ex vivo in tumour-bearing immunocompromised mice four different gold nanocarriers for 68Ga-labelled bombesin and neurotensin analogues that exhibited high stability in physiological conditions, minimum accumulation in non-targeted organs and fast distribution in colon and prostate tumour tissue. The gene discussed is GRP; the disease is prostate neoplasm.