Evaluation of phototoxic potential of aerial components of the fig tree against human melanoma

Cell Prolif. 2012 Jun;45(3):279-85. doi: 10.1111/j.1365-2184.2012.00816.x. Epub 2012 Apr 2.

Abstract

Objectives: To date, Ficus carica L. cultivar Dottato (F. carica) has not been studied from a phototoxic point of view. In the present work, aerial components of F. carica from Italy, were examined to assess their antioxidant and phototoxic activity on human melanoma cells. A relationship between antioxidant, phototoxic activities and chemical composition has also been investigated.

Materials and methods: Coumarin and fatty acid content in F. carica leaves, bark and woody parts were examined and compared by capillary GC and GC/MS. Polyphenolic content was also determined. Linoleic acid peroxidation and DPPH test were used to assess antioxidant activities, and MTT assay was used to evaluate anti-proliferative activity, on C32 human melanoma cells, after irradiation with a UVA dose of 1.08 J/cm(2).

Results: Leaves demonstrated the best antioxidant and anti-proliferative activity in comparison to bark and wood. In particular, leaves were shown to possess the highest anti-radical activity and inhibition of peroxidation, with IC(50) values of 64 and 1.48 μg/ml respectively. The leaves had highest anti-proliferative activity with IC(50) value of 3.92 μg/ml. The phytochemical investigation revealed different composition between the coumarins, psoralen and bergapten, fatty acids, polyphenols and flavonoid content among plant parts.

Conclusions: Data obtained indicate that this type of fig tree may constitute an excellent source of bioactive compounds, such as phenolics, coumarins and fatty acids. This study offers a new perspective in developing others formulations potentially useful in photodynamic therapy for treatment of non-melanoma skin cancers.

MeSH terms

  • Antineoplastic Agents, Phytogenic / pharmacology*
  • Antioxidants / pharmacology
  • Cell Line, Tumor
  • Ficus / chemistry*
  • Gas Chromatography-Mass Spectrometry
  • Humans
  • Lipid Peroxidation / drug effects*
  • Lipid Peroxidation / radiation effects
  • Melanoma / metabolism
  • Plant Bark / chemistry
  • Plant Components, Aerial / chemistry
  • Plant Extracts / chemistry
  • Plant Extracts / pharmacology*
  • Plant Leaves / chemistry
  • Plant Stems / chemistry
  • Ultraviolet Rays

Substances

  • Antineoplastic Agents, Phytogenic
  • Antioxidants
  • Plant Extracts