title: In Vivo Targeted MR Imaging of Endogenous Neural Stem Cells in Ischemic Stroke.
abstract: Acute ischemic stroke remains a leading cause of death and disability. Endogenous neurogenesis enhanced via activation of neural stem cells (NSCs) could be a promising method for stroke treatment. In vivo targeted tracking is highly desirable for monitoring the dynamics of endogenous NSCs in stroke. Previously, we have successfully realized in vivo targeted MR imaging of endogenous NSCs in normal adult mice brains by using anti-CD15 antibody-conjugated superparamagnetic iron oxide nanoparticles (anti-CD15-SPIONs) as the molecular probe. Herein, we explore the performance of this molecular probe in targeted in vivo tracking of activated endogenous NSCs in ischemic stroke. Our study showed that intraventricular injection of anti-CD15-SPIONs could label activated endogenous NSCs in situ seven days after ischemic stroke, which were detected as enlarged areas of hypo-intense signals on MR imaging at 7.0 T. The treatment of cytosine arabinosine could inhibit the activation of endogenous NSCs, which was featured by the disappearance of areas of hypo-intense signals on MR imaging. Using anti-CD15-SPIONs as imaging probes, the dynamic process of activation of endogenous NSCs could be readily monitored by in vivo MR imaging. This targeted imaging strategy would be of great benefit to develop a new therapeutic strategy utilizing endogenous NSCs for ischemic stroke.
authors: Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong, China. xinxin110007@126.com.
authors: Fang
authors: F
authors: Zhang
authors: Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong, China. duanxiaohui-128@163.com.
authors: Xiaohui
authors: X
authors: Duan
authors: Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong, China. luliejing@foxmail.com.
authors: Liejing
authors: L
authors: Lu
authors: Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong, China. xiangz2007@163.com.
authors: Xiang
authors: X
authors: Zhang
authors: Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong, China. zhxm07@126.com.
authors: Xiaomei
authors: X
authors: Zhong
authors: Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong, China. canterburybells@126.com.
authors: Jiaji
authors: J
authors: Mao
authors: Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong, China. anyway90@163.com.
authors: Meiwei
authors: M
authors: Chen
authors: Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, Guangdong, China. shenjun@mail.sysu.edu.cn.
authors: Jun
authors: J
authors: Shen
mesh_terms: D000818:Animals; D000906:Antibodies / Q000494:pharmacology*; D002545:Brain Ischemia / Q000000981:diagnostic imaging* / Q000378:metabolism; D058948:Cell Tracking / Q000379:methods*; D003287:Contrast Media / Q000494:pharmacology*; D005647:Fucosyltransferases / Q000037:antagonists & inhibitors*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D058185:Magnetite Nanoparticles; D051379:Mice; D058953:Neural Stem Cells / Q000378:metabolism / Q000473:pathology*; D020521:Stroke / Q000000981:diagnostic imaging* / Q000473:pathology
chemical_list: D000906:Antibodies; D003287:Contrast Media; D058185:Magnetite Nanoparticles; D005647:Fucosyltransferases; C541914:Fut4 protein, mouse
keywords: adult; iron oxide nanoparticles; ischemic stroke; magnetic resonance imaging; monoclonal anit-CD15 antibody; neural stem cells