Effects of Lumbricus on the Change of Cerebral Hemodynamics in Rats

구인(蚯蚓)이 흰쥐의 뇌혈류역학 변화에 미치는 효과

  • Lee, Chong-Woo (Dept. of Oriental Rehabilitation Medicine, College of Oriental Medicine, Won-Kwang University) ;
  • Kwon, Young-Dal (Dept. of Oriental Rehabilitation Medicine, College of Oriental Medicine, Won-Kwang University) ;
  • Yeom, Seung-Ryong (Dept. of Oriental Rehabilitation Medicine, College of Oriental Medicine, Won-Kwang University) ;
  • Song, Yung-Sun (Dept. of Oriental Rehabilitation Medicine, College of Oriental Medicine, Won-Kwang University)
  • 이정우 (원광대학교 한의과대학 한방재활의학과교실) ;
  • 권영달 (원광대학교 한의과대학 한방재활의학과교실) ;
  • 염승룡 (원광대학교 한의과대학 한방재활의학과교실) ;
  • 송용선 (원광대학교 한의과대학 한방재활의학과교실)
  • Received : 2007.12.21
  • Accepted : 2008.01.18
  • Published : 2008.01.31
  • 27 0


Abstract

Objectives : This experimental study was designed to investigate the effects of Lumbricus extract (LE) on the changes in regional cerebral blood flow (rCBF) and mean arterial blood pressure (MABP) in normal rats, and further to determine the mechanism of action of LE. Methods : The changes of rCBF were observed by Laser-Doppler flowmetry (LDF) and the changes of MABP were recorded by a data acquisition system assembled with MacLab and Macintosh. Results : LE significantly increased rCBF in a high dosage(10.0 mg/kg, i.p), but MABP was somewhat increased as compared with baseline. This result suggests that LE significantly increased rCBF by dilating pial arterial diameter. Increase of LE-induced rCBF was significantly inhibited by pretreatment with indomethacin (1 mg/kg, i.p), an inhibitor of cyclooxygenase, but was not significantly inhibited by pretreatment with methylene blue ($10{\mu}g/kg$, i.p), an inhibitor of guanylate cyclase. Conclusions : LE increased rCBF by dilating pial arterial diameter, and the action of this response was mediated by cyclooxygenase.