Plachitin, which is reconstituted by the combination of CDDP and
chitin, has been reported to have a slow releasing property of CDDP and an antitumor effect. The antitumor effect and pharmacokinetics of
Plachitin for intraarterial chemoembolization
therapy were studied in rabbits using VX2
tumor inoculated in the hind limb. One gram of
Plachitin contained 300 mg CDDP, and the form of
Plachitin was modified into particles (about 50 microns in diameter).
Plachitin was injected into the femoral artery. The study was carried out in four groups. The
tumor growth ratio was significantly lower in the
Plachitin group than in the CDDP,
chitin, and control groups (p < 0.05).
Tumor regression was noticed only in the
Plachitin group. The
tumor platinum (Pt.) level was higher than the serum Pt. level for 5 days after
Plachitin injection. From the above results it can be concluded that
Plachitin particles released CDDP slowly around the
tumor and the
tumor growth was suppressed by the additive effect of CDDP and embolization.
Plachitin was considered a useful agent for chemoembolization
therapy for the
cancer patients.