GNRH1 and cancer: LHRH (Luteinizing hormone-releasing hormone), also known as GnRH (Gonadotropin-releasing hormone), is a decapeptide (QHWSYGLRPG) produced by the hypothalamus, has been used to deliver various anti-cancer agents or drugs to cancer cells by using the principle that LHRH peptide will specifically bind to cancer cells with LHRH-receptor being abundant on their cell membrane rather than to the normal cells with low or no expression of LHRH-receptor [18,19,20].