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Anti-Angiogenic Effects of Betulinic Acid Administered in Nanoemulsion Formulation Using Chorioallantoic Membrane Assay

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Betulinic acid (3, hydroxy-lup-20(29)-en-28-oic acid, BA), a pentacyclic triterpenoid, is derived from a widely distributed natural anticancer compound betulin. It has selective anticancer activity against several tumor cells, and recently it was shown that it also possess anti-angiogenic effects. The objective of this study was to formulate betulinic acid, a poorly aqueous-soluble compound, in flax-seed oil containing nanoemulsion formulation for enhanced delivery efficiency and to effectively inhibit the tumor angiogenic process. The nanoemulsion was prepared using high pressure homogenization method with a Microfludizer® processor. The betulinic acid nanoemulsion was studied for the effect on the angiogenic process by performing the in vivo chick embryo chorioallantoic membrane (CAM) assay. The sample volume of 1 l and 5 l of the blank and BA nanoemulsions were applied directly on the CAM. The preliminary results from macroscopic, morphological and immunohistochemical evaluations have shown that morphological change was produced in the CAM mesenchyme with a negative impact on the normal growth of the capillaries. Betulinic acid does possess anti-angiogenic activity in a dose dependent manner, and the nanoemulsion formulation maintained this effect.
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Keywords: ANTI-ANGIOGENIC EFFECT; BETULINIC ACID; CHORIOALLANTOIC MEMBRANE; NANOEMULSION

Document Type: Research Article

Publication date: April 1, 2011

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  • Journal of Biomedical Nanotechnology (JBN) is a peer-reviewed multidisciplinary journal providing broad coverage in all research areas focused on the applications of nanotechnology in medicine, drug delivery systems, infectious disease, biomedical sciences, biotechnology, and all other related fields of life sciences.
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