AAPS PharmSciTech

, Volume 19, Issue 8, pp 3501–3511 | Cite as

Enhancement in the Transdermal and Localized Delivery of Honokiol Through Breast Tissue

  • Xinyi Gao
  • Meera Gujjar Patel
  • Pooja Bakshi
  • Dipali Sharma
  • Ajay K. BangaEmail author
Research Article Theme: Advances in Topical Delivery of Drugs
Part of the following topical collections:
  1. Theme: Advances in Topical Delivery of Drugs


Honokiol is a natural phenolic anti-cancer compound isolated from an extract of seed cones from Magnolia grandiflora. This study investigated the transdermal delivery of honokiol using various enhancement methods and to explore the potential of honokiol to treat breast cancer directly via delivery through mammary papilla. Poration of dermatomed human skin with microneedles significantly increased the delivery of honokiol by nearly 3-fold (97.81 ± 18.96 μg/cm2) compared with passive delivery (32.56 ± 5.67 μg/cm2). Oleic acid was found to be the best chemical penetration enhancer, increasing the delivery almost 27-fold (868.06 ± 100.91 μg/cm2). Addition of oleic acid also resulted in better retention of drug in the porcine mammary papilla (965.41 ± 80.26 μg/cm2) compared with breast skin (294.16 ± 8.49 μg/cm2). Anti-cancer effect of honokiol was demonstrated with the decrease in the release of cytokine IL-6 and further suppression of Ki-67 proliferative protein. In addition, the topical honokiol formulation investigated was found to be safe and non-irritant. In summary, both microneedles and chemical enhancers can improve the absorption of honokiol through skin. Directly applying honokiol on mammary papilla is a potential administration route which can increase localized delivery into breast tissue.


honokiol breast cancer transdermal drug delivery microneedle chemical enhancer 


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Copyright information

© American Association of Pharmaceutical Scientists 2018

Authors and Affiliations

  • Xinyi Gao
    • 1
  • Meera Gujjar Patel
    • 1
  • Pooja Bakshi
    • 1
  • Dipali Sharma
    • 2
  • Ajay K. Banga
    • 1
    Email author
  1. 1.Center for Drug Delivery, Department of Pharmaceutical SciencesMercer UniversityAtlantaUSA
  2. 2.Department of OncologyJohns Hopkins University School of Medicine and the Sidney Kimmel Comprehensive Cancer Center at Johns HopkinsBaltimoreUSA

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