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Related Experiment Videos

Advanced neuroblastoma impairs dendritic cell function in adoptive immunotherapy.

Richard E Redlinger1, Robbie B Mailliard, Edward M Barksdale

  • 1Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.

Journal of Pediatric Surgery
|June 5, 2003
PubMed
Summary

Interleukin-12 transduced dendritic cells (DC) from tumor-bearing mice showed reduced effectiveness against neuroblastoma (NB). Tumor exposure duration, not cell phenotype, impacted DC antitumor activity.

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Area of Science:

  • Immunotherapy
  • Cancer Research
  • Dendritic Cell Biology

Background:

  • Neuroblastoma (NB) is a challenging malignancy.
  • Previous studies showed complete NB regression using interleukin-12 (IL-12) transduced dendritic cells (DC) from naive mice.
  • Malignancies like NB can impair DC immunostimulation.

Purpose of the Study:

  • To investigate if IL-12 transduced DC from NB-bearing mice retain antitumor properties.
  • To test the hypothesis that DC from tumor-bearing mice can effectively treat established NB.

Main Methods:

  • Established NB in A/J mice received peritumoral injection of DC (DC, IL-12 DC, day 7 IL-12 DC, or day 14 IL-12 DC).
  • Tumor growth, DC phenotype, and NK/T cell activity were measured.

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Main Results:

  • Naive IL-12 DC induced 100% tumor regression and prolonged survival.
  • IL-12 DC from tumor-bearing mice showed partial responses (75% for day 7, 25% for day 14).
  • No significant differences in DC phenotype or effector cell activation were observed between tumor-bearing and naive mice.

Conclusions:

  • IL-12 DC from tumor-bearing mice have diminished antitumor activity against established murine NB.
  • Decreased efficacy is linked to tumor exposure duration, with day 14 DC being less effective than day 7 DC.
  • Phenotype and immune cell activation potential were similar despite varying antitumor effects.