Formulating a single thioether-bridged oleate prodrug into a self-nanoemulsifying drug delivery system to facilitate oral absorption of docetaxel

Biomater Sci. 2019 Feb 26;7(3):1117-1131. doi: 10.1039/c8bm00947c.

Abstract

Oral chemotherapy of docetaxel (DTX) is restricted by active P-glycoprotein (P-gp) efflux, hepatic first-pass metabolism and then poor oral absorption. Herein, a lipophilic thioether-bridged oleate prodrug (DTX-S-OA) and an ester-bond linked oleate prodrug of docetaxel (DTX-OA) were synthesized and efficiently incorporated into a self-nanoemulsifying drug delivery system (SNEDDS) using core-matching technology with a high drug-loading rate. DTX-S-OA SNEDDS produced a uniform droplet size of about 30 nm and a significantly high drug loading capability (60 mg mL-1), compared with DTX SNEDDS (20 mg mL-1). Additionally, DTX-S-OA SNEDDS exhibited a markedly slower drug release property and higher (>2-fold) drug solubilization in the aqueous phase after 60 min lipolysis compared with DTX SNEDDS. In situ single-pass intestinal perfusion and intestinal biodistribution studies demonstrated that the membrane permeability and intestinal bioadhesion of SNEDDS were significantly increased. Moreover, DTX-S-OA showed a comparable ability with verapamil in inhibiting P-gp efflux. Lymphatic transport studies confirmed that DTX-S-OA SNEDDS could significantly enhance intestinal lymphatic transport. Notably, the bioavailability of DTX-S-OA SNEDDS was 6.2-fold and 2.0-fold higher than that of the DTX solution and DTX SNEDDS, respectively. Furthermore, DTX-S-OA achieved a more rapid release of free DTX from the prodrug in systemic circulation than DTX-OA. Therefore, such a unique combination strategy of the single thioether-bridged DTX-oleate prodrug and SNEDDS is a promising platform to enable effective oral delivery of DTX.

MeSH terms

  • Administration, Oral
  • Animals
  • Coumarins / chemistry
  • Docetaxel / chemistry*
  • Docetaxel / metabolism
  • Drug Carriers / chemistry*
  • Drug Liberation
  • Emulsions / chemistry
  • Intestinal Mucosa / metabolism
  • Intestines / pathology
  • Mice
  • Oleic Acid / chemistry
  • Particle Size
  • Prodrugs / chemistry*
  • Prodrugs / metabolism
  • Rats
  • Rats, Sprague-Dawley
  • Solubility
  • Sulfides / chemistry*
  • Thiazoles / chemistry

Substances

  • Coumarins
  • Drug Carriers
  • Emulsions
  • Prodrugs
  • Sulfides
  • Thiazoles
  • coumarin 6
  • Docetaxel
  • Oleic Acid