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Opioids and Cancer Mortality.

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Current Treatment Options in Oncology
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Opioid use in cancer patients shows mixed results in preclinical studies, with no high-quality human trials confirming effects on survival. Cancer pain itself impacts survival, necessitating continued opioid use for effective pain management.

Keywords:
CancerMortalityOpioidPainSurvival

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Area of Science:

  • Oncology
  • Pain Management
  • Pharmacology

Background:

  • Opioids are standard for cancer pain, but preclinical data suggest both pro-tumor and anti-tumor effects.
  • Opioid-induced immunosuppression, enhanced cell migration, and angiogenesis are implicated in pro-tumor activity.
  • Conversely, opioids may induce apoptosis and phagocytosis, suggesting anti-tumor potential.

Purpose of the Study:

  • To review the conflicting evidence regarding opioid use and cancer survival.
  • To highlight the lack of high-quality human trials on this association.
  • To emphasize the importance of managing cancer pain for patient quality of life.

Main Methods:

  • Literature review of preclinical studies and human clinical trials.
  • Analysis of proposed mechanisms for opioid effects on tumor progression and regression.
  • Evaluation of the impact of cancer pain on patient survival.

Main Results:

  • Preclinical studies in mice show opioids can promote tumor growth via immunosuppression and angiogenesis.
  • Some preclinical data suggest opioids may also have anti-tumor effects through apoptosis.
  • High-quality human randomized controlled trials are lacking to confirm these findings in cancer patients.

Conclusions:

  • Preclinical findings on opioid effects on cancer survival should be interpreted cautiously due to conflicting data and lack of human trials.
  • Cancer progression and cancer pain itself are significant factors associated with poor survival in advanced cancer patients.
  • Effective cancer pain management with opioids is crucial for improving quality of life and performance status, despite ongoing research questions.