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• Original Article •
Mechanism of epidural artery implantation in accelerating the drainage of thalamic interstitial fluid by using tracer-based MRI
ZHOU Jie  LIAN Jingge  REN Qiushi  WANG Hui  KONG Dongsheng  WANG Wei  LIU Huipo  LI Hongfeng  CHENG Jin  HAN Hongbin 

Cite this article as: ZHOU J, LIAN J G, REN Q S, et al. Mechanism of epidural artery implantation in accelerating the drainage of thalamic interstitial fluid by using tracer-based MRI[J]. Chin J Magn Reson Imaging, 2023, 14(2): 97-102. DOI:10.12015/issn.1674-8034.2023.02.017.


[Abstract] Objective To investigate the effect of epidural arterial implantation (EAI) on the drainage of interstitial fluid (ISF) in rat thalamus and its mechanism.Materials and Methods Thirty 240-280 g male SD rats were randomly divided into control group, EAI group and EAI contralateral measurement group. The latter two groups were randomly divided into two subgroups on the 7th and 14th day after operation, with six rats in each group. The ISF drainage in thalamus was detected by tracer-based MRI and using diffusion of extracellular space-mapping (DECS-mapping) techniques to study the structure of extracellular space (ECS). The macroscopic distribution index of ISF drainage: half-life time (T1/2), and the structural parameters of ECS: diffusion rate (D*), tortuosity (λ), volume fraction (α) were obtained. The changes of regional cerebral blood flow in the parietal cortex of rats were observed by laser Doppler flow meter under the guidance of stereotactic instrument. Motor and cognitive performance was quantified with open filed test and novel recognition test at baseline and 7, 14 days after EAI.Results Tracer-based MRI and DECS-mapping analysis showed that the half-life time of EAI7 and EAI14 groups was lower than that of the other groups (P＜0.01); the diffusion rate and volume fraction of EAI7 and EAI14 groups increased compared with other groups (P＜0.05), and the tortuosity decreased compared with other groups (P<0.05), indicating that the molecular diffusion movement in ECS was accelerated and the structure of ECS was changed. There was no difference in cerebral blood flow between the control group and EAI14 group (P＞0.05), indicating that the operation did not change the local cerebral blood flow of rats in a short time. There was no difference in the indexes of animal behavior test among the groups (P＞0.05), indicating that the operation did not damage the motor and cognitive abilities of rats.Conclusions EAI changed the microstructure of ECS in the ipsilateral thalamus of rats and promoted the drainage of ISF, which was a stable, safe and effective means of active regulation of brain ECS.
[Keywords] epidural arterial implantation；brain；extracellular space；interstitial fluid；tracer-based magnetic resonance imaging；magnetic resonance imaging

ZHOU Jie1, 2, 3   LIAN Jingge1, 2, 3   REN Qiushi1, 4   WANG Hui1, 2, 3   KONG Dongsheng5   WANG Wei6   LIU Huipo3   LI Hongfeng1   CHENG Jin7*   HAN Hongbin1, 2, 3*  

1 Institute of Medical Technology, Peking University Health Science Center, Beijing 100191, China

2 Department of Radiology, Peking University Third Hospital, Beijing 100191, China

3 Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China

4 Shenzhen Research Institute of Peking University, Shenzhen 518055, China

5 Department of Neurosurgery, First Medical Center, General Hospital of Chinese PLA, Beijing 100191, China

6 Department of Radiology, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100191, China

7 School of Mathematical Science, Fudan University, Shanghai 200433, China

*Correspondence to: Han HB, E-mail: hanhongbin@bjmu.edu.cn Cheng J, E-mail: jcheng@fudan.edu.cn

Conflicts of interest   None.

ACKNOWLEDGMENTS National Natural Science Foundation of China (No. 12126601); Shenzhen Science and Technology Program (No. KQTD20180412181221912).
Received  2022-10-21
Accepted  2023-01-12
DOI: 10.12015/issn.1674-8034.2023.02.017
Cite this article as: ZHOU J, LIAN J G, REN Q S, et al. Mechanism of epidural artery implantation in accelerating the drainage of thalamic interstitial fluid by using tracer-based MRI[J]. Chin J Magn Reson Imaging, 2023, 14(2): 97-102. DOI:10.12015/issn.1674-8034.2023.02.017.

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