신경세포 배양법을 이용한 methamphetamine과 cadmium의 신경독성 평가

Neurotoxicity Assessment of Methamphetamine and Cadmium Using Cultured Neuronal Cells of Long-Evans Rats

  • 조대현 (식품의약품안전본부 독성연구소 독성부) ;
  • 김준규 (식품의약품안전본부 독성연구소 독성부) ;
  • 정용 (식품의약품안전본부 독성연구소 독성부) ;
  • 이봉훈 (식품의약품안전본부 독성연구소 독성부) ;
  • 김은엽 (식품의약품안전본부 독성연구소 독성부) ;
  • 김정구 (식품의약품안전본부 독성연구소 독성부) ;
  • 조태순 (성균관대학교 약학대학) ;
  • 김진석 (건국대학교 수의과대학) ;
  • 문화회 (식품의약품안전본부 독성연구소 독성부)
  • Cho, Dae-Hyun (Department of Toxicology, Korea Food and Drug Administration) ;
  • Kim, Jun-Gyon (Department of Toxicology, Korea Food and Drug Administration) ;
  • Jeong, Yong (Department of Toxicology, Korea Food and Drug Administration) ;
  • Lee, Bong-Hun (Department of Toxicology, Korea Food and Drug Administration) ;
  • Kim, Eun-Youb (Department of Toxicology, Korea Food and Drug Administration) ;
  • Kim, Jeong-Goo (Department of Toxicology, Korea Food and Drug Administration) ;
  • Cho, Tai-Soon (College of Pharmacy, Sung Kyun Kwan University) ;
  • Kim, Jin-Suk (College of Veterinary Medicine, Kon-Kuk University) ;
  • Moon, Hwa-Hwey (Department of Toxicology, Korea Food and Drug Administration)
  • 발행 : 1996.06.01

초록

Primary culture of cerebellar neuronal cells derived from 8-day old Long-Evans rats was used. Pure granule cells, astrocytes or mixed cells culture systems were prepared. These cells were differentiated and developed synaptic connections. And the astrocytes were identified by immunostaining with glial fibrillary acidic protein (GFAP). Methamphetamine (MAP), which acts on dopaminergic system and cadmium (Cd), a toxic heavy metal, were applied and biochemical assays and electrophysiological studies were performed. $LC_50$ values estimated by MTT assay of MAP and Cd were 3 mM and 2$\mu M$ respectively. Cells were treated with 1 mM or 2 mM MAP and 1$\mu M$ $CdCl_2$ for 48 hour, and the incubation media were analyzed for the content of released LDH. MAP (2 mM) and Cd significantly increased the LDH release. Cell viability was decreased in both groups and some cytopathological changes like cell swelling or vacuolization were seen. The cerebellar granule cells were used for measuring membrane currents using whole-cell clamp technique. Sodium and potassium currents were not affected by MAP neither Cd, but calcium current was significantly reduced by Cd but not affected by MAP. Therefore, in vitro neurotoxicity test system using neuronaI cells and astrocytes cultures were established and can be used in screening of potential neurotoxic chemicals.

키워드

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