4.6 Article

3,5,4 '-Trimethoxy-trans-stilbene loaded microemulsion for cutaneous melanoma therapy by transdermal drug delivery

Journal

DRUG DELIVERY AND TRANSLATIONAL RESEARCH
Volume 11, Issue 1, Pages 169-181

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s13346-020-00757-w

Keywords

3,5,4 '-Trimethoxy-trans-stilbene; Topical administration; Melanoma; Drug delivery; Microemulsion

Funding

  1. Nature Science Foundation of China [NSFC81573718]
  2. Fundamental Research Funds for Central Universities of Central South University [2019zzts360]
  3. Hunan Provincial Science and Technology Plan [2016TP2002]

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The study successfully prepared an oil-in-water microemulsion loaded with BTM for transdermal therapy of melanoma. The microemulsion can penetrate the skin, increase the retention of BTM in the epidermis, and effectively suppress tumor growth when combined with Taxol, while also having lower toxicity to normal organs. This combination therapy shows potential for skin cancer therapy.
For therapy of skin cancer, transdermal administration has been a potential way to enhance chemotherapy. However, the drug delivery efficacy remained unsatisfactory because of the physiological barriers from the skin to the tumor, which hindered the effect of 3,5,4 '-trimethoxy-trans-stilbene (BTM), a drug that has toxicity to cancer. Herein, we prepared an oil-in-water (O/W) microemulsion to load BTM (BTM-ME) for transdermal therapy of melanoma. BTM-ME was characterized by size, zeta potential, and polymer disperse index (PDI). B16F10 melanoma cell line was used for cell experiments and animal models. And cell uptake, viability assay, and flow cytometry were to test the cell internalization and the ability of BTM-ME to induce cancer cell apoptosis. Skin penetration testing was to detect its penetration efficiency to the skin. And tumor-bearing mice were used to prove the improvement of anti-cancer efficacy of BTM-ME with the combination of Taxol. BTM was successfully loaded in O/W microemulsion, with a drug loading capacity of 24.82 mg/mL. BTM-ME can penetrate the skin and increase the retention of BTM in the epidermis. And the combination of Taxol and BTM-ME effectively suppressed tumor growth and has lower toxicity to normal organs. BTM-ME provides adjuvant therapy to cutaneous melanoma and the combination of Taxol and BTM-ME has the clinical potential for skin cancer therapy.

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