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A self-designed CpG ODN enhanced the anti-melanoma effect of pimozide

Huijie Jia1, Jing Guo2, Pingping Wang3

  • 1Institute of Precision Medicine, Xinxiang Medical University, 601 Jinsui Road, Xinxiang 453007, China; Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang, China; Department of Pathology, Xinxiang Medical University, Xinxiang, China.

International Immunopharmacology
|March 30, 2020
PubMed

Insights

This study shows that combining pimozide with CpG oligodeoxynucleotides (CpG ODN) effectively inhibits melanoma growth and enhances anti-tumor immunity in mice. This combination therapy offers a promising strategy for improving melanoma treatment outcomes.

Area of Science:

  • Oncology
  • Immunology
  • Dermatology

Background:

  • Melanoma is an aggressive skin cancer requiring novel therapeutic strategies.
  • Pimozide demonstrates melanoma growth inhibition, but its efficacy needs enhancement.
  • Tumor immunotherapy, particularly using Toll-like receptor 9 (TLR9) agonists like CpG ODN, shows promise in cancer eradication.

Purpose of the Study:

  • To investigate the combined therapeutic effects of pimozide and CpG ODN in a melanoma mouse model.
  • To evaluate the impact of this combination therapy on tumor growth, survival, and immune cell profiles.

Main Methods:

  • Melanoma-bearing mice were treated with pimozide alone, CpG ODN alone, or a combination of both.
  • Tumor growth, survival rates, and immune cell infiltration (CD4+, CD8+ T cells, NK cells) were assessed.
  • Expression levels of MMP2 and p-Stat5 were analyzed.

Main Results:

  • The combination of pimozide and CpG ODN significantly inhibited melanoma tumor growth and prolonged mouse survival.
  • Combined treatment suppressed MMP2 and p-Stat5 expression.
  • Increased infiltration and ratios of CD4+, CD8+ T cells, and NK cells were observed in tumors.

Conclusions:

  • Pimozide combined with CpG ODN demonstrates enhanced anti-melanoma efficacy compared to monotherapy.
  • The combination therapy may exert its effects through inducing apoptosis, inhibiting invasion, and modulating the immune response.
  • Further research into optimized combination therapies involving pimozide is warranted.
Keywords:
CpG ODNImmunotherapyMelanomaPimozideSTAT

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