名古屋市立大学脳神経科学研究所

SAWAMOTO LAB 澤本研究室 - 名古屋市立大学医学研究科脳神経科学研究所 神経発達・再生医学分野

SAWAMOTO LAB 澤本研究室 - 名古屋市立大学医学研究科脳神経科学研究所 神経発達・再生医学分野

脳梗塞モデルにおける血管に沿った再生ニューロンの移動に関する新しい論文が掲載されました。

Subventricular Zone-Derived Neural Progenitor Cells Migrate Along a Blood Vessel Scaffold Toward the Post-Stroke Striatum

Kojima T, Hirota Y, Ema M, Takahashi S, Miyoshi I, Okano H, Sawamoto K.

The subventricular zone (SVZ) of the adult brain contains neural stem cells that have the capacity to regenerate new neurons after various insults. Brain ischemia causes damage to brain tissue and induces neural regeneration together with angiogenesis. We previously reported that, after ischemic injury in mice, SVZ-derived neural progenitor cells (NPCs) migrate into the striatum, and these NPCs are frequently associated with blood vessels in the regenerating brain tissue. Here we studied the role of blood vessels during the neural regeneration in more detail. BrdU administration experiments revealed that newly generated NPCs were associated with both newly formed and pre-existing blood vessels in the ischemic striatum, suggesting that the angiogenic environment is not essential for the neuron-blood-vessel interaction. To observe migrating NPCs and blood vessels simultaneously in damaged brain tissue, we performed live imaging of cultured brain slices after ischemic injury. In this system, we virally labeled SVZ-derived NPCs in Flk1-EGFP knock-in mice, in which the blood vessels are labeled with EGFP. Our results provide direct evidence that SVZ-derived NPCs migrate along blood vessels from the SVZ toward the ischemic region of the striatum. The leading process of the migrating NPCs was closely associated with blood vessels, suggesting that this interaction provides directional guidance to the NPCs. These findings suggest that blood vessels play an important role as a scaffold for NPCs migration toward the damaged brain region.

Stem Cells 2010 Jan 13. [Epub ahead of print]

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澤本研究室

SAWAMOTO LAB

Department of Developmental and Regenerative Neurobiology
Institute of Brain Science
Nagoya City University Graduate School of Medical Sciences

1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan

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