Camphor white oil induces tumor regression through cytotoxic T cell-dependent mechanisms

Yalda Moayedi, Sophie A. Greenberg, Blair A. Jenkins, Kara L. Marshall, Lina V. Dimitrov, Aislyn M. Nelson, David M. Owens, Ellen A. Lumpkin

Research output: Contribution to journalArticlepeer-review


Bioactive derivatives from the camphor laurel tree, Cinnamomum camphora, are posited to exhibit chemopreventive properties but the efficacy and mechanism of these natural products are not fully understood. We tested an essential-oil derivative, camphor white oil (CWO), for anti-tumor activity in a mouse model of keratinocyte-derived skin cancer. Daily topical treatment with CWO induced dramatic regression of pre-malignant skin tumors and a two-fold reduction in cutaneous squamous cell carcinomas. We next investigated underlying cellular and molecular mechanisms. In cultured keratinocytes, CWO stimulated calcium signaling, resulting in calcineurin-dependent activation of nuclear factor of activated T cells (NFAT). In vivo, CWO induced transcriptional changes in immune-related genes identified by RNA-sequencing, resulting in cytotoxic T cell-dependent tumor regression. Finally, we identified chemical constituents of CWO that recapitulated effects of the admixture. Together, these studies identify T cell-mediated tumor regression as a mechanism through which a plant-derived essential oil diminishes established tumor burden.

Original languageEnglish (US)
Pages (from-to)722-734
Number of pages13
JournalMolecular Carcinogenesis
Issue number5
StatePublished - May 2019


  • NFAT
  • calcium
  • camphor white oil
  • inflammation
  • squamous cell carcinoma

ASJC Scopus subject areas

  • Molecular Biology
  • Cancer Research


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