title: Scintigraphic study on the distribution of radiolabeled cis-diamminedichloroplatinum (II) in the tumor-bearing rabbit: a comparison between intra-arterial injection with lipiodol and intravenous injection.
abstract: To compare the distribution of cis-diamminedichloroplatinum (II) (CDDP) on scintigraphic images between intra-arterial injection with lipiodol and intravenous injection, we obtained serial scintigraphic images using radiolabeled CDDP (Pt-195m CDDP), which had a high specific activity (7.4 x 10(6) Bq [200 microCi]/mg-CDDP), in the rabbit VX-2 tumor system. A dose of 9.25 x 10(6) Bq (250 microCi) of Pt-195m CDDP was injected at one shot via an ear vein, while 7.4 x 10(6) Bq (200 microCi of Pt-195m CDDP mixed with 1 ml of lipiodol was injected at one shot via a saphenous artery. Mean pixel count, which was corrected for the total dose injected, in the arterially injected tumor always exceeded than that in the intravenously injected tumor. Pt-195m CDDP uptake by the rabbit tumor at 2 hr was 7.8% of the total injected dose with intravenous injection and 16.0% with intra-arterial injection. These data suggest that intra-arterial injection with lipiodol is a more useful method to increase CDDP uptake by tumors than intra-venous injection.
authors.affiliation: Department of Radiology, Ehime University School of Medicine, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kataoka
authors.forename: M
authors.initials: M
authors.lastname: Kawamura
authors.forename: Y
authors.initials: Y
authors.lastname: Nishiyama
authors.forename: T
authors.initials: T
authors.lastname: Fujii
authors.forename: H
authors.initials: H
authors.lastname: Mogami
authors.forename: H
authors.initials: H
authors.lastname: Itoh
authors.forename: K
authors.initials: K
authors.lastname: Akuta
authors.forename: M
authors.initials: M
authors.lastname: Akaboshi
authors.forename: K
authors.initials: K
authors.lastname: Kawai
authors.forename: K
authors.initials: K
authors.lastname: Hamamoto
mesh_terms: D000818:Animals; D002945:Cisplatin / Q000008:administration & dosage / Q000493:pharmacokinetics*; D005260:Female; D006614:Hindlimb; D007261:Infusions, Intra-Arterial; D007262:Infusions, Intravenous; D007269:Injections, Intra-Arterial; D007275:Injections, Intravenous; D007459:Iodized Oil / Q000008:administration & dosage; D009368:Neoplasm Transplantation; D009374:Neoplasms, Experimental / Q000000981:diagnostic imaging*; D010984:Platinum; D011817:Rabbits; D011868:Radioisotopes; D011877:Radionuclide Imaging
chemical_list: D011868:Radioisotopes; D010984:Platinum; D007459:Iodized Oil; D002945:Cisplatin