title: The sustained release of LH X RH agonist from LH X RH agonist-polymer composite in patients with prostatic cancer.
abstract: Luteinizing hormone-releasing hormone (LH X RH) agonist can be administered daily to patients with prostatic cancer with resulting clinical efficacy. A sustained drug release formulation of an LH X RH agonist, (D-Leu6)-des Gly-NH2(10)-LH X RH ethylamide (leuprolide)-vinyl polymer composite, was prepared by means of radiation-induced polymerization under a supercooled state. The sustained release of leuprolide from subcutaneously implanted leuprolide-vinyl polymer composite (14 mm in diameter and 4 mm in thickness) was obtained over a period of several months in five patients with prostatic cancer. Serum testosterone levels began to decrease on the tenth day, fell below 1 ng/ml after three weeks of implantation, and thereafter remained at the castration level until removal of the polymer composite. Clinical improvement was associated with serum hormonal changes, and support this as a novel and superior method of administration of LH X RH agonist.
mesh_terms: D000368:Aged; D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D003692:Delayed-Action Preparations; D005640:Follicle Stimulating Hormone / Q000097:blood; D007987:Gonadotropin-Releasing Hormone / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use; D006728:Hormones / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D016729:Leuprolide; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D011108:Polymers; D011471:Prostatic Neoplasms / Q000188:drug therapy*; D013739:Testosterone / Q000097:blood
chemical_list: D000970:Antineoplastic Agents; D003692:Delayed-Action Preparations; D006728:Hormones; D011108:Polymers; D007987:Gonadotropin-Releasing Hormone; D013739:Testosterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D016729:Leuprolide