title: Pharmacokinetic advantage of intraperitoneal injection of docetaxel in the treatment for peritoneal dissemination of cancer in mice.
abstract: Intraperitoneal administration of docetaxel has been used to treat peritoneal dissemination of cancer, but its safety has not yet been confirmed. We have compared the pharmacokinetic behaviour of docetaxel after intravenous and intraperitoneal administration in CD-1-nu/nu mice bearing MKN45P, a gastric cancer variant line producing peritoneal dissemination. Docetaxel (8 mg kg(-1)) was intravenously or intraperitoneally injected into the mice and at designated times the drug concentration was measured in plasma, ascites fluid, and abdominal tissues (liver, kidney, intestine and spleen, solid cancer, and suspended free cancer). The pharmacokinetic behaviour of docetaxel was similar in control mice and cancer-bearing mice after administration via either route, except that the transfer of docetaxel from the abdominal cavity to systemic blood (plasma) was slower in cancerbearing mice than in control mice. As expected, the intraperitoneal drug concentration was much higher (approximately 100-fold) and was maintained for a longer time in the intraperitoneal injection group than in the intravenous injection group. The drug concentrations in peritoneal solid cancer tissue and suspended free cancer cells were also significantly higher for a longer time in the intraperitoneal injection group than in the intravenous injection group. The values of the plasma area under concentration-time curves (AUC) were similar for both administration routes. The ratio of AUC ascite/AUC plasma after intraperitoneal administration was higher than after intravenous administration. The drug concentration in abdominal organs after intraperitoneal injection was lower during the first 2 h, then became similar to those after intravenous injection. These results indicated that the intraperitoneal administration of docetaxel for peritoneal dissemination was likely to be an effective treatment method, without causing any increase in systemic toxicity.
authors.affiliation: Department of Hospital Pharmacy, Kanazawa University School of Medicine, 13-1 Takara-machi, Kanazawa 920-8641, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Shimada
authors.forename: Masaaki
authors.initials: M
authors.lastname: Nomura
authors.forename: Koichi
authors.initials: K
authors.lastname: Yokogawa
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Endo
authors.forename: Takuma
authors.initials: T
authors.lastname: Sasaki
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Miyamoto
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yonemura
mesh_terms: D000818:Animals; D019540:Area Under Curve; D001202:Ascitic Fluid / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism; D045744:Cell Line, Tumor; D000077143:Docetaxel; D005260:Female; D006801:Humans; D007274:Injections, Intraperitoneal; D007275:Injections, Intravenous; D007413:Intestinal Mucosa / Q000378:metabolism; D007422:Intestines / Q000737:chemistry / Q000187:drug effects; D007564:Japan; D008099:Liver / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism; D051379:Mice; D008813:Mice, Inbred ICR; D009368:Neoplasm Transplantation / Q000379:methods; D009374:Neoplasms, Experimental / Q000097:blood / Q000188:drug therapy / Q000209:etiology; D010529:Peritoneal Cavity / Q000503:physiopathology; D010534:Peritoneal Neoplasms / Q000737:chemistry / Q000188:drug therapy* / Q000556:secondary*; D013154:Spleen / Q000737:chemistry / Q000187:drug effects; D043823:Taxoids / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics*; D013997:Time Factors
chemical_list: D043823:Taxoids; D000077143:Docetaxel