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논문 기본 정보

자료유형
학술저널
저자정보
Jeong Ji Hoon (Department of Pharmacology, College of Pharmacy, Chung Ang University) Choi Kyung Bum (Department of Pharmacology, College of Pharmacy, Chung Ang University) Moon Nam Ju (Department of Ophthalmology, Chung Ang University) Park Eon Sub (Department of Pathology, College of Medicine, Chung Ang University) Sohn Uy Dong (Department of Pharmacology, College of Pharmacy, Chung Ang University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제28권 제2호
발행연도
2005.1
수록면
238 - 242 (5page)

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Many reports demonstrate that extremely low frequency magnetic fields (ELF MFs, 60 Hz) may be involved in hyperalgesia. In a previous investigation, we suggested that MFs may produce hyperalgesia and such a response may be regulated by the benzodiazepine system. In order to further confirm this effect of MFs, we used diazepam and/or flumazenil with MFs exposure. When testing the pain threshold of rats using hot plate tests, MFs or diazepam ($0.5\;{\mu}g$, i.c.v.; a benzodiazepine receptor agonist) induced hyperalgesic effects with the reduction of latency. These effects were blocked by a pretreatment of flumazenil (1.5 mg/kg, i.p.; a benzodiazepine receptor antagonist). When the rats were exposed simultaneously to MFs and diazepam, the latency tended to decrease without statistical significance. The induction of hyperalgesia by co-exposure to MFs and diazepam was also blocked by flumazenil. However, the pretreatment of GABA receptor antagonists such as bicuculline ($0.1\;{\mu}g$, i.c.v.; a $GABA_A$ antagonist) or phaclofen ($10\;{\mu}g$, i.c.v.; a $GABA_B$ antagonist) did not antagonize the hyperalgesic effect of MFs. These results suggest that the benzodiazepine system may be involved in MFs-induced hyperalgesia.

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