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(Stroke. 2005;36:2725.)
© 2005 American Heart Association, Inc.

Original Contributions

Bone Marrow Stromal Cells That Enhanced Fibroblast Growth Factor-2 Secretion by Herpes Simplex Virus Vector Improve Neurological Outcome After Transient Focal Cerebral Ischemia in Rats

Naokado Ikeda, MD; Naosuke Nonoguchi, MD; Ming Zhu Zhao, MD; Takuji Watanabe, MD, PhD; Yoshinaga Kajimoto, MD, PhD; Daisuke Furutama, MD, PhD; Fumiharu Kimura, MD, PhD; Mari Dezawa, MD, PhD; Robert S. Coffin, MD, PhD; Yoshinori Otsuki, MD, PhD; Toshihiko Kuroiwa, MD, PhD Shin-Ichi Miyatake, MD, PhD

From the Department of Neurosurgery (N.I., N.N., M.Z.Z., T.W., Y.K., T.K., S.-I.M.), First Department of Internal Medicine (D.F., F.K.), and Department of Anatomy and Biology (Y.O.), Osaka Medical College, Japan; Department of Anatomy and Neurobiology (M.D.), Kyoto University Graduate School of Medicine, Kyoto University, Japan; and Department of Molecular Pathology (R.S.C.), University College London, United Kingdom.

Reprint requests to Drs Shin-Ichi Miyatake and Toshihiko Kuroiwa, Department of Neurosurgery, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka, 569-8686, Japan. E-mail neu070{at}poh.osaka-med.ac.jp and neu040@poh.osaka-med.ac.jp

Background and Purpose— Fibroblast growth factor-2 (FGF-2) administration and bone marrow stromal cell (MSC) transplantation could improve neurological deficits after occlusive cerebrovascular disease. In the present study, we examined the effects of neurological improvement after transient middle cerebral artery occlusion (MCAO) in rats by a novel therapeutic strategy with FGF-2 gene–transferred MSCs by the herpes simplex virus type 1 (HSV-1) vector.

Methods— Adult Wistar rats were anesthetized. Nonmodified MSCs, FGF-2–modified MSCs with HSV-1 1764/-4/pR19/ssIL2-FGF-2, or PBS was administered intracerebrally 24 hours after transient right MCAO. All animals underwent behavioral tests for 21 days, and the infarction volume with 2-3-5-triphenylterazolium was detected 3 days and 14 days after the MCAO. Three days and 7 days after the MCAO, the FGF-2 production in the ipsilateral hemisphere of the MCAO was measured with ELISA. Seven and 14 days after the MCAO, immunohistochemical staining for FGF-2 was applied.

Results— The stroke animals receiving FGF-2–modified MSCs demonstrated significant functional recovery compared with the other groups. Fourteen days after the MCAO, there was a significant reduction in infarction volume only in FGF-2–modified MSC-treated group. FGF-2 production in the FGF-2–modified MSC-treated brain was significantly higher compared with the other groups at 3 and 7 days after MCAO. Administrated FGF-2–modified MSCs strongly expressed the FGF-2 protein, which was proven by ELISA.

Conclusions— Our data suggest that the FGF-2 gene–modified MSCs with the HSV-1 vector can contribute to remarkable functional recovery after stroke compared with MSCs transplantation alone.

Key Words: bone marrow cell • cerebral infarct • FGF-2 • HSV-1 vector

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