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eCAM Advance Access originally published online on July 21, 2004
eCAM 2004 1(2):187-191; doi:10.1093/ecam/neh024
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© 2004, the authors Evidenced-based Complementary and Alternative Medicine, Vol. 1, Issue 2 © Oxford University Press 2004; all rights reserved. The online version of this article has been published under an open access model. Users are entitled to use, reproduce, disseminate, or display the open access version of this article provided that: the original authorship is properly and fully attributed; the Journal and Oxford University Press are attributed as the original place of publication with the correct citation details given; if an article is subsequently reproduced or disseminated not in its entirety but only in part or as a derivative work this must be clearly indicated.

Original Article

Study on Application of Static Magnetic Field for Adjuvant Arthritis Rats

Norimasa Taniguchi1,3,*, Shigeyuki Kanai1,2, Masazumi Kawamoto2, Hiroshi Endo2 and Hideaki Higashino2

1Kansai College of Oriental Medicine Sennan-gun, Osaka, Japan, 2Department of Pharmacology, Kinki University School of Medicine Osaka-Sayama, Osaka, Japan, and 3Department of Science, Pip-Fujimoto Co., Ltd Chuo-ku, Osaka, Japan

In order to examine the effectiveness of the application of static magnetic field (SMF) on pain relief, we performed a study on rats with adjuvant arthritis (AA). Sixty female Sprague–Dawley (SD) rats (age: 6 weeks, body weight: approximately 160 g) were divided into three groups [SMF-treated AA rats (Group I), non-SMF-treated AA rats (Group II) and control rats (Group III)]. The SD rats were injected in the left hind leg with 0.6 mg/0.05 ml Mycobacterium butyrium to induce AA. The rats were bred for 6 months as chronic pain model. Thereafter, the AA rats were or were not exposed to SMF for 12 weeks. We assessed the changes in the tail surface temperature, locomotor activity, serum inflammatory marker and bone mineral density (BMD) using thermography, a metabolism measuring system and the dual-energy X-ray absorptiometry (DEXA) method, respectively. The tail surface temperature, locomotor activity and femoral BMD of the SMF-exposed AA rats were significantly higher than those of the non-SMF-exposed AA rats, and the serum inflammatory marker was significantly lower. These findings suggest that the pain relief effects are primarily due to the increased blood circulation caused by the rise in the tail surface temperature. Moreover, the pain relief effects increased with activity and BMD of the AA rats.

Keywords: static magnetic field – adjuvant arthritis – thermography – locomotor activity

*For reprints and all correspondence: Norimasa Taniguchi, Kansai College of Oriental Medicine, 2–11–1 Wakaba Kumatori-cho, Sennan-gun, Osaka 590-0482, Japan. Tel: +81-724-53-8251; Fax: +81-724-53-0276. E-mail: n-taniguchi{at}pipfujimoto.co.jp; kanai{at}kansai.ac.jp


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