Brain Transport Profiles of Ginsenoside Rb1 by Glucose Transporter 1: In Vitro and in Vivo
Ginsenoside Rb1 (Rb1) has been demonstrated its protection for central nervous system and is apparently highly distributed to the brain. The objective of this study was to characterize Rb1 transport at the blood–brain barrier (BBB) using primary cultured rat brain microvascular endothelial cells (rB...
Main Authors: | , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Frontiers Media S.A.
2018-04-01
|
Series: | Frontiers in Pharmacology |
Subjects: | |
Online Access: | http://journal.frontiersin.org/article/10.3389/fphar.2018.00398/full |
id |
doaj-0595a3e40aca48f083a0bbdc69c90804 |
---|---|
record_format |
Article |
spelling |
doaj-0595a3e40aca48f083a0bbdc69c908042020-11-24T22:08:56ZengFrontiers Media S.A.Frontiers in Pharmacology1663-98122018-04-01910.3389/fphar.2018.00398344147Brain Transport Profiles of Ginsenoside Rb1 by Glucose Transporter 1: In Vitro and in VivoYu-Zhu WangQing XuWei WuYing LiuYing JiangQing-Qing CaiQian-Zhou LvXiao-Yu LiGinsenoside Rb1 (Rb1) has been demonstrated its protection for central nervous system and is apparently highly distributed to the brain. The objective of this study was to characterize Rb1 transport at the blood–brain barrier (BBB) using primary cultured rat brain microvascular endothelial cells (rBMEC), an in vitro BBB model. The initial uptake velocity of Rb1 in rBMEC was temperature- and concentration-dependent, and was significantly reduced by phloretin, an inhibitor of GLUT1 transporter, but was independent of metabolic inhibitor. Furthermore, the transport of Rb1 into rBMEC was significantly diminished in the presence of natural substrate α-D-glucose, suggesting a facilitated transport of Rb1 via GLUT1 transporter. The impact of GLUT1 on the distribution of Rb1 between brain and plasma was studied experimentally in rats. Administration of phloretin (5 mg/kg, i.v.) to normal rats for consecutive 1 week before Rb1 (10 mg/kg, i.v.) at 0.5, 2, and 6 h did not alter Rb1 concentrations in plasma, but resulted in significant decreased brain concentrations of Rb1 compared to in the phloretin-untreated normal rats (489.6 ± 58.3 versus 105.1 ± 15.1 ng/g, 193.8 ± 11.1 versus 84.8 ± 4.1 ng/g, and 114.2 ± 24.0 versus 39.9 ± 4.9 ng/g, respectively). The expression of GLUT1 in the phloretin-treated group by western blotting analysis in vitro and in vivo experiments was significantly decreased, indicating that the decreased transport of Rb1 in brain was well related to the down-regulated function and level of GLUT1. Therefore, our in vitro and in vivo results indicate that the transport of Rb1 at the BBB is at least partly mediated by GLUT1 transporter.http://journal.frontiersin.org/article/10.3389/fphar.2018.00398/fullcarrier-mediated transporterdrug transportblood–brain barrierglucose transporter 1ginsenoside Rb1 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yu-Zhu Wang Qing Xu Wei Wu Ying Liu Ying Jiang Qing-Qing Cai Qian-Zhou Lv Xiao-Yu Li |
spellingShingle |
Yu-Zhu Wang Qing Xu Wei Wu Ying Liu Ying Jiang Qing-Qing Cai Qian-Zhou Lv Xiao-Yu Li Brain Transport Profiles of Ginsenoside Rb1 by Glucose Transporter 1: In Vitro and in Vivo Frontiers in Pharmacology carrier-mediated transporter drug transport blood–brain barrier glucose transporter 1 ginsenoside Rb1 |
author_facet |
Yu-Zhu Wang Qing Xu Wei Wu Ying Liu Ying Jiang Qing-Qing Cai Qian-Zhou Lv Xiao-Yu Li |
author_sort |
Yu-Zhu Wang |
title |
Brain Transport Profiles of Ginsenoside Rb1 by Glucose Transporter 1: In Vitro and in Vivo |
title_short |
Brain Transport Profiles of Ginsenoside Rb1 by Glucose Transporter 1: In Vitro and in Vivo |
title_full |
Brain Transport Profiles of Ginsenoside Rb1 by Glucose Transporter 1: In Vitro and in Vivo |
title_fullStr |
Brain Transport Profiles of Ginsenoside Rb1 by Glucose Transporter 1: In Vitro and in Vivo |
title_full_unstemmed |
Brain Transport Profiles of Ginsenoside Rb1 by Glucose Transporter 1: In Vitro and in Vivo |
title_sort |
brain transport profiles of ginsenoside rb1 by glucose transporter 1: in vitro and in vivo |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Pharmacology |
issn |
1663-9812 |
publishDate |
2018-04-01 |
description |
Ginsenoside Rb1 (Rb1) has been demonstrated its protection for central nervous system and is apparently highly distributed to the brain. The objective of this study was to characterize Rb1 transport at the blood–brain barrier (BBB) using primary cultured rat brain microvascular endothelial cells (rBMEC), an in vitro BBB model. The initial uptake velocity of Rb1 in rBMEC was temperature- and concentration-dependent, and was significantly reduced by phloretin, an inhibitor of GLUT1 transporter, but was independent of metabolic inhibitor. Furthermore, the transport of Rb1 into rBMEC was significantly diminished in the presence of natural substrate α-D-glucose, suggesting a facilitated transport of Rb1 via GLUT1 transporter. The impact of GLUT1 on the distribution of Rb1 between brain and plasma was studied experimentally in rats. Administration of phloretin (5 mg/kg, i.v.) to normal rats for consecutive 1 week before Rb1 (10 mg/kg, i.v.) at 0.5, 2, and 6 h did not alter Rb1 concentrations in plasma, but resulted in significant decreased brain concentrations of Rb1 compared to in the phloretin-untreated normal rats (489.6 ± 58.3 versus 105.1 ± 15.1 ng/g, 193.8 ± 11.1 versus 84.8 ± 4.1 ng/g, and 114.2 ± 24.0 versus 39.9 ± 4.9 ng/g, respectively). The expression of GLUT1 in the phloretin-treated group by western blotting analysis in vitro and in vivo experiments was significantly decreased, indicating that the decreased transport of Rb1 in brain was well related to the down-regulated function and level of GLUT1. Therefore, our in vitro and in vivo results indicate that the transport of Rb1 at the BBB is at least partly mediated by GLUT1 transporter. |
topic |
carrier-mediated transporter drug transport blood–brain barrier glucose transporter 1 ginsenoside Rb1 |
url |
http://journal.frontiersin.org/article/10.3389/fphar.2018.00398/full |
work_keys_str_mv |
AT yuzhuwang braintransportprofilesofginsenosiderb1byglucosetransporter1invitroandinvivo AT qingxu braintransportprofilesofginsenosiderb1byglucosetransporter1invitroandinvivo AT weiwu braintransportprofilesofginsenosiderb1byglucosetransporter1invitroandinvivo AT yingliu braintransportprofilesofginsenosiderb1byglucosetransporter1invitroandinvivo AT yingjiang braintransportprofilesofginsenosiderb1byglucosetransporter1invitroandinvivo AT qingqingcai braintransportprofilesofginsenosiderb1byglucosetransporter1invitroandinvivo AT qianzhoulv braintransportprofilesofginsenosiderb1byglucosetransporter1invitroandinvivo AT xiaoyuli braintransportprofilesofginsenosiderb1byglucosetransporter1invitroandinvivo |
_version_ |
1725813749052342272 |