Formulation and characterization of self-nanoemulsifying drug delivery systems containing monoacyl phosphatidylcholine

TY - JOUR

T1 - Formulation and characterization of self-nanoemulsifying drug delivery systems containing monoacyl phosphatidylcholine

AU - Tran, Thuy

AU - Xi, Xi

AU - Rades, Thomas

AU - Müllertz, Anette

N1 - Copyright © 2016 Elsevier B.V. All rights reserved.

PY - 2016/4/11

Y1 - 2016/4/11

N2 - The study investigated the use of monoacyl phosphatidylcholine (MAPC) in self-nanoemulsifying drug delivery system (SNEDDS). A D-optimal design was used to generate two sets of formulations containing long-chain (LC) or medium-chain (MC) glycerides, caprylocaproyl macrogol-8 glycerides (Labrasol), Lipoid S LPC 80 (LPC) (80% MAPC) and ethanol. The formulations were characterized using dynamic light scattering, microscopy, in vitro lipolysis and viscometric measurements. All LC formulations within the investigated range were predicted to generate polydisperse emulsions while MC formulations generated nanoemulsions with droplet sizes from 23 to 167 nm. Using LPC in MC formulations reduced the nanoemulsion droplet sizes in simulated gastric and intestinal media. The nanoemulsion droplet size of MC SNEDDS containing LPC was not affected by gastrointestinal pH, while the zeta potentials increased at low pH. During in vitro lipolysis, less fatty acids were released when LPC was incorporated into the formulations (2.05 ± 0.02 mmol reduced to 1.76 ± 0.05 mmol when incorporating 30% LPC). Replacing Labrasol by LPC increased the formulation dynamic viscosity from 57 ± 1 mPa s (0% LPC) to 436 ± 8 mPa s (35% LPC) at 25°C, however, this did not considerably prolong the formulation dispersion time. In conclusion, MC SNEDDS containing LPC are promising formulations when desiring to reduce the amount of synthetic surfactants and possibly modify the digestion rate.

AB - The study investigated the use of monoacyl phosphatidylcholine (MAPC) in self-nanoemulsifying drug delivery system (SNEDDS). A D-optimal design was used to generate two sets of formulations containing long-chain (LC) or medium-chain (MC) glycerides, caprylocaproyl macrogol-8 glycerides (Labrasol), Lipoid S LPC 80 (LPC) (80% MAPC) and ethanol. The formulations were characterized using dynamic light scattering, microscopy, in vitro lipolysis and viscometric measurements. All LC formulations within the investigated range were predicted to generate polydisperse emulsions while MC formulations generated nanoemulsions with droplet sizes from 23 to 167 nm. Using LPC in MC formulations reduced the nanoemulsion droplet sizes in simulated gastric and intestinal media. The nanoemulsion droplet size of MC SNEDDS containing LPC was not affected by gastrointestinal pH, while the zeta potentials increased at low pH. During in vitro lipolysis, less fatty acids were released when LPC was incorporated into the formulations (2.05 ± 0.02 mmol reduced to 1.76 ± 0.05 mmol when incorporating 30% LPC). Replacing Labrasol by LPC increased the formulation dynamic viscosity from 57 ± 1 mPa s (0% LPC) to 436 ± 8 mPa s (35% LPC) at 25°C, however, this did not considerably prolong the formulation dispersion time. In conclusion, MC SNEDDS containing LPC are promising formulations when desiring to reduce the amount of synthetic surfactants and possibly modify the digestion rate.

KW - Journal Article

KW - Research Support, Non-U.S. Gov't

UR - http://www.sciencedirect.com/science/article/pii/S0378517316302769?via%3Dihub

U2 - 10.1016/j.ijpharm.2016.02.026

DO - 10.1016/j.ijpharm.2016.02.026

M3 - Journal article

C2 - 26915809

SN - 0378-5173

VL - 502

SP - 151

EP - 160

JO - International Journal of Pharmaceutics

JF - International Journal of Pharmaceutics

IS - 1-2

ER -