Augmentation for intratumoral accumulation and anti-tumor activity of liposome-encapsulated adriamycin by tumor necrosis factor-alpha in mice

Int J Cancer. 1990 Dec 15;46(6):1095-100. doi: 10.1002/ijc.2910460624.

Abstract

The effect of recombinant human tumor necrosis factor-alpha (rhTNF-alpha) on anti-tumor activity of adriamycin entrapped in small unilamellar liposomes (ADM-Lip) has been studied using BALB/c mice bearing subdermal Meth-A fibrosarcoma. Accumulation of i.v. injected ADM-Lip, but not of free ADM, into tumor tissue was augmented by a single i.v. injection of rhTNF-alpha. The maximum effect of rhTNF-alpha was expressed when it was injected 1 hr before ADM-Lip. This rhTNF-alpha treatment did not result in increased accumulation of ADM-Lip in normal organs. Based on these results, we treated mice bearing Meth-A tumor with rhTNF-alpha and then with ADM-Lip 1 hr later. By 2-cycle treatments using this regimen, tumor growth was markedly inhibited, and 5 out of 13 mice tested were cured of tumor, while treatment with rhTNF-alpha alone, ADM alone, ADM-Lip alone or rhTNF-alpha plus ADM resulted neither in prolongation of survival time nor in cure of mice. Our results indicate that ADM-Lip can express a potent and systemic anti-tumor activity after pretreatment of animals with TNF, but only when administration of these drugs is appropriately timed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Doxorubicin / administration & dosage*
  • Doxorubicin / pharmacokinetics
  • Drug Carriers
  • Fibrosarcoma / drug therapy*
  • Fibrosarcoma / metabolism
  • Liposomes
  • Male
  • Mice
  • Mice, Inbred BALB C
  • Tissue Distribution / drug effects
  • Tumor Necrosis Factor-alpha / pharmacology*

Substances

  • Drug Carriers
  • Liposomes
  • Tumor Necrosis Factor-alpha
  • Doxorubicin