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eCAM Advance Access published online on October 5, 2006
eCAM, doi:10.1093/ecam/nel055
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© 2006 The Author(s).
Received October 19, 2005
Accepted July 5, 2006

Original Article

Recovery of Small-Sized Blood Vessels in Ischemic Bone Under Static Magnetic Field

Shenzhi Xu 1, Naohide Tomita 2 *, Ken Ikeuchi 3, and Yoshito Ikada 4

1 International Innovation Center, Kyoto University, Kyoto, Japan; Department of Sciences, Pip Tokyo Co., Ltd, Tokyo, Japan
2 International Innovation Center, Kyoto University, Kyoto, Japan
3 Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
4 Faculty of Medical Engineering, Suzuka University of Medical Science, Mie, Japan

* To whom correspondence should be addressed.
Naohide Tomita, E-mail: ntomita{at}iic.kyoto-u.ac.jp


  Abstract

Effects of static magnetic field (SMF) on the vascularization in bone were evaluated using an ischemic bone model, where rat femoral artery was ligated. Magnetized and unmagnetized samarium- cobalt rods were implanted transcortically into the middle diaphysis of the ischemic femurs. Collateral circulation was evaluated by injection of microspheres into the abdominal aorta at the third week after ligation. It was found that the bone implanted with a magnetized rod showed a larger amount of trapped microspheres than that with an unmagnetized rod at the proximal and the distal region (P < 0.05 proximal region). There were no significant differences at the middle and the distal region. This tendency was similar to that of the bone mineral density in the SMF-exposed ischemic bone.

Keywords: blood vessel; ischemic model; microsphere; static magnetic field.
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