KMID : 0043320150380071325
|
|
Archives of Pharmacal Research 2015 Volume.38 No. 7 p.1325 ~ p.1335
|
|
Increased brain uptake of venlafaxine loaded solid lipid nanoparticles by overcoming the efflux function and expression of P-gp
|
|
Zhou Yan
Zhang Guoqiang Rao Zhi Yang Yang Zhou Qian Qin Hongyan Wei Yuhui Wu Xin¡¯an
|
|
Abstract
|
|
|
Venlafaxine (VLX) could be pumped out of the brain by P-glycoprotein (P-gp). Moreover, the expression of P-gp distributed in blood?brain barrier could be significantly induced by VLX. Thus, P-gp could be considered as the nature barrier for delivering of VLX to the brain. The aim of this study was to investigate whether the efflux function and increased expression of P-gp could be reversed by utilizing solid lipid nanoparticles (SLN). VLX solid lipid nanoparticles (VLX ? SLN) were prepared and evaluated. Pharmacokinetics and brain distribution of VLX in different formulations were conducted after oral or intravenous administration. P-gp efflux function to VLX was evaluated by the brain uptake amount of VLX, while P-gp expression was investigated by Western blotting. Results indicated that the entrapment, mean size and zata potential of VLX ? SLN was 74.9 ¡¾ 3.0 %, 186.3 ¡¾ 69.26 nm and ?22.8 ¡¾ 7.78 mv, respectively. After vein injection of VLX formulations, the brain uptake amount of VLX from VLX ? SLN was significantly higher than that of VLX solution, VLX solution with empty SLN (VLX+ empty SLN) and VLX solution with Verapamil (VLX + Ver), respectively. Furthermore, the protein mass of P-gp in VLX ? SLN treated group was the lowest among all the investigated groups. These results indicated that SLN could overcome P-gp and achieve brain target by intravenous administration.
|
|
KEYWORD
|
|
P-glycoprotein, Blood?brain barrier, Solid lipid nanoparticles, Venlafaxine
|
|
FullTexts / Linksout information
|
|
|
|
Listed journal information
|
|
|