Planta Med 2010; 76 - P497
DOI: 10.1055/s-0030-1264795

Preparation and characterization of PLGA nanoparticles containing demethylfruticulin A from Salvia corrugata Vahl. (Lamiaceae)

E Russo 1, B Parodi 1, G Caviglioli 1, A Bisio 1, E Giacomelli 1, G Romussi 1, A Schito 2, S Cafaggi 1
  • 1University of Genoa, Dept. of of Chemistry and Pharmaceutical and Food Technologies, Via Brigata Salerno 13, 16147 Genova, Italy
  • 2University of Genoa, Di.S.C. Sezione di Microbiologia, Largo R. Benzi 10, 16132 Genova, Italy

Demethylfruticulin A (SCO1) is the major diterpenoid component of the exudate produced by the trichomes of Salvia corrugata leaves. The activity of this new compound against Gram-positive pathogens [1] and the apoptosis effect on mammalian cell lines [2] were investigated in previous works. The aim of this study was to evaluate the possibility of incorporating this natural product into PLGA nanoparticles in order to improve its solubility in the aqueous medium and to favour the interaction with bacterial membrane. Nanoparticles were prepared by an emulsion-diffusion-evaporation method, using Poloxamer 407 as a stabilizer. A Doehlert design for two variables was used to study the influence of the stirring time and the final volume of water on the size (D) and the zeta potential (Z) of the nanoparticles. The obtained nanoparticles showed interesting features: small size (D=207±8nm), a negative zeta potential (Z=–14.0±0.4 mV), an increasable drug loading (3% w/w) and high encapsulation efficiency (95% w/w). They also showed a good stability after redispersion in water for 30 days. These preliminary results indicate that PLGA nanoparticles can be designed as a carrier for delivery of SCO1, possibly allowing this new compound to exceed the intrinsic resistance of some bacteria to several antibiotics and to carry out its potential antitumour activity.

References: 1. Bisio A., Romussi G., Russo E., Cafaggi S., Schito A.M., Repetto B., De Tommasi N. (2008)J. Agric. Food Chem. 56: 10468–10472.

2. Giannoni P., Narcisi R., De Torero D., Romussi G., Quarto R., Bisio A. (2010) Phytomedicine 17: 449–456.