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Cannabinoid Receptor Type-2 in B Cells Is Associated with Tumor Immunity in Melanoma

Thomas Gruber1,2, Steve Robatel1,2, Mirela Kremenovic1,2

  • 1Institute of Pathology, University of Bern, 3008 Bern, Switzerland.

Cancers
|April 30, 2021
PubMed

Insights

Cannabinoid receptor 2 (CB2R) plays a protective role in melanoma by modulating B cell immunity. Targeting CB2R may offer new avenues for cancer therapy.

Area of Science:

  • Immunology
  • Oncology
  • Pharmacology

Background:

  • The endocannabinoid system (ECS) is being explored for cancer treatment potential.
  • Cannabinoid receptor 2 (CB2R) influences lymphocyte development and inflammation.

Purpose of the Study:

  • To investigate the role of CB2R in the immune response against melanoma.
  • To explore CB2R as a potential therapeutic target for melanoma.

Main Methods:

  • Analysis of The Cancer Genome Atlas (TCGA) data for CB2R expression and patient survival.
  • Utilizing a murine melanoma model to study CB2R's effect on tumor growth and immune cell infiltration.
  • Single-cell RNA sequencing of tumor-infiltrating B cells.

Main Results:

  • CB2R expression positively correlated with survival and B cell infiltration in human melanoma.
  • CB2R deficiency led to increased melanoma growth and altered B cell frequencies in the tumor microenvironment.
  • Tumor-infiltrating B cells in CB2R-deficient mice exhibited a less differentiated phenotype.

Conclusions:

  • CB2R plays a protective role in melanoma through a B cell-mediated immune response.
  • These findings suggest CB2R as a potential therapeutic target for novel melanoma treatments.
Keywords:
CB2Rcannabinoid receptor type-2endocannabinoid systemmelanomaregulatory B cells

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