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中国生物工程杂志

China Biotechnology
China Biotechnology  2017, Vol. 37 Issue (12): 1-7    DOI: 10.13523/j.cb.20171201
Orginal Article     
Construction of Blood-brain Barrier in vitro Model Based on Microfluidic Chip
Li-li JIANG,Jun-song ZHENG,Yan LI,Jun DENG,Li-chao FANG,Hui HUANG()
Department of Clinical Laboratory Medicine,The First Affiliated Hospital,Third Military Medical University ,Chongqing 400038,China
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Abstract   Objective:

To create a blood-brain barrier in vitro model by microfluidic chip technology, which were easy to control and close to microenvironment.

Methods:

The microfluidic chips were composed of dual pool structure, separated by the polycarbonate membrane, and there were two sets of flow control system, mouse brain vascular endothelial cells and astrocytes were isolated and purified, the cells were identified by immunofluorescence. Then cells were added to the two pools according to the order, and infused at 1μl/min flow rate. The blood-brain barrier(BBB) model was constructed, and then identified and evaluated.

Results:

Two kinds of cells were obtained by isolation and purification, and the cells were identified by immunofluorescence and the purity was above 95%. After 3 days of co-culture, tight junctions began to develop, and the peak is on the fifth day, the ultrastructural observation showed that the mouse brain vascular endothelial cells formed tight junctions, the penetration experiments of fluorescein sodium and the measurement of TEER showed that barrier formation was good.

Conclusion:

The blood-brain barrier model was constructed based on the microfluidic chip, It may become a new platform for drug screening, neural system basis and other studies.



Key wordsMicrofluidic chip      Blood-brain barrier model      Microenvironment     
Received: 05 July 2017      Published: 16 December 2017
ZTFLH:  Q819  
Cite this article:

Li-li JIANG,Jun-song ZHENG,Yan LI,Jun DENG,Li-chao FANG,Hui HUANG. Construction of Blood-brain Barrier in vitro Model Based on Microfluidic Chip. China Biotechnology, 2017, 37(12): 1-7.

URL:

https://manu60.magtech.com.cn/biotech/10.13523/j.cb.20171201     OR     https://manu60.magtech.com.cn/biotech/Y2017/V37/I12/1

Fig.1 Design and fabrication of BBB model for microfluidic chip
(a) Chip design upper layer (b) Chip design lower layer (c) The diagram of chip mounting (d) The diagram of cells with chip (e)Silicon mold (f) Microfluidic device system
Fig.2 Cell preparation of the BBB model based on the microfluidic chip
(a) Cerebral microvascular endothelial cells were cultured for 7 days (×100) (b) vWF staining ,DAPI staining (×200) (c) Astrocytes were purified for fourth generations (×100) (d) GFAP staining ,DAPI staining (×200)
Fig.3 Transmission electron microscope of BBB model based on microfluidic chip
(a) Two layers of cells were co-culture and separated by PC membranes (b)The tight junction protein of the cerebral vascular endothelial cells
Fig.4 The penetration experiments of fluorescein sodium with BBB model
Fig.5 The TEER measurement of BBB model
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