Opioid antagonists inhibit the growth of metastatic murine neuroblastoma

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Naltrexone (NTX), an opiate antagonist, had an inhibitory effect on the growth of S20Y neuroblastoma (NB) in A Jax mice. Daily injections of 0.1 mg/kg NTX resulted in a 69% tumor take, 70% delay in time prior to tumor appearance, and a 60% increase in median survival time. Inoculation of NB in control mice resulted in 100% tumor take within 15 days. The pattern and incidence of metastases of NTX and control mice were similar. These results show that NTX has antineoplastic activity, and suggests a role for the endogenous opioid system in neuro-oncogenic events.

Original languageEnglish (US)
Pages (from-to)89-94
Number of pages6
JournalCancer Letters
Issue number1
StatePublished - Nov 1983

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research


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