BDNF 유전자 이입 슈반세포와 PGA 도관을 이용한 백서 좌골신경 재생에 관한 연구

PERIPHERAL NERVE REGENERATION USING POLYGLYCOLIC ACID CONDUIT AND BRAIN-DERIVED NEUROTROPHIC FACTOR GENE TRANSFECTED SCHWANN CELLS IN RAT SCIATIC NERVE

  • 최원재 (서울대학교 치과대학 구강악안면외과학교실) ;
  • 안강민 (서울대학교 치과대학 구강악안면외과학교실) ;
  • 고은봉 (서울대학교 치과대학 구강악안면외과학교실) ;
  • 신영민 (서울대학교 치과대학 구강악안면외과학교실) ;
  • 김윤태 (서울대학교 치과대학 구강악안면외과학교실) ;
  • 황순정 (서울대학교 치과대학 구강악안면외과학교실) ;
  • 김남열 (연세대학교 의과대학 약리학교실) ;
  • 김명진 (서울대학교 치과대학 구강악안면외과학교실) ;
  • 조승우 (한양대학교 공과대학 화공학과) ;
  • 김병수 (한양대학교 공과대학 화공학과) ;
  • 김윤희 (경희대학교 문리대학 생물학과) ;
  • 김성민 (강릉대학교 치과대학 구강악안면외과학교실) ;
  • 이종호 (서울대학교 치과대학 구강악안면외과학교실)
  • Choi, Won-Jae (Department of Oral & Maxillofacial Surgery, College of Dentistry, Seoul National University) ;
  • Ahn, Kang-Min (Department of Oral & Maxillofacial Surgery, College of Dentistry, Seoul National University) ;
  • Gao, En-Feng (Department of Oral & Maxillofacial Surgery, College of Dentistry, Seoul National University) ;
  • Shin, Young-Min (Department of Oral & Maxillofacial Surgery, College of Dentistry, Seoul National University) ;
  • Kim, Yoon-Tae (Department of Oral & Maxillofacial Surgery, College of Dentistry, Seoul National University) ;
  • Hwang, Soon-Jeong (Department of Oral & Maxillofacial Surgery, College of Dentistry, Seoul National University) ;
  • Kim, Nam-Yeol (Department of Pharmacology, Yonsei Medical School) ;
  • Kim, Myung-Jin (Department of Oral & Maxillofacial Surgery, College of Dentistry, Seoul National University) ;
  • Jo, Seung-Woo (Department of Chemical Engineering, Hanyang University) ;
  • Kim, Byung-Soo (Department of Chemical Engineering, Hanyang University) ;
  • Kim, Yun-Hee (Department of Biology, Kyung-Hee University) ;
  • Kim, Soung-Min (Department of Oral & Maxillofacial Surgery, College of Dentistry, Kangnung National University) ;
  • Lee, Jong-Ho (Department of Oral & Maxillofacial Surgery, College of Dentistry, Seoul National University)
  • 발행 : 2004.12.31

초록

Purpose : The essential triad for nerve regeneration is nerve conduit, supporting cell and neurotrophic factor. In order to improve the peripheral nerve regeneration, we used polyglycolic acid(PGA) tube and brain-derived neurotrophic factor(BDNF) gene transfected Schwann cells in sciatic nerve defects of SD rat. Materials and methods : Nerve conduits were made with PGA sheet and outer surface was coated with poly(lactic-co-glycolic acid) for mechanical strength and control the resorption rate. The diameter of conduit was 1.8mm and the length was 17mm Schwann cells were harvested from dorsal root ganglion(DRG) of SD rat aged 1 day. Schwann cells were cultured on the PGA sheet to test the biocompatibility adhesion of Schwann cell. Human BDNF gene was obtained from cDNA library and amplified using PCR. BDNF gene was inserted into E1 deleted region of adenovirus shuttle vector, pAACCMVpARS. BDNF-adenovirus was multiplied in 293 cells and purified. The BDNF-Adenovirus was then infected to the cultured Schwann cells. Left sciatic nerve of SD rat (250g weighing) was exposed and 14mm defects were made. After bridging the defect with PGA conduit, culture medium(MEM), Schwann cells or BDNF-Adenovirus infected Schwann cells were injected into the lumen of conduit, respectively. 12 weeks after operation, gait analysis for sciatic function index, electrophysiology and histomorphometry was performed. Results : Cultured Schwann cells were well adhered to PGA sheet. Sciatic index of BDNF transfected group was $-53.66{\pm}13.43$ which was the best among three groups. The threshold of compound action potential was between 800 to $1000{\mu}A$ in experimental groups which is about 10 times higher than normal sciatic nerve. Conduction velocity and peak voltage of action potential of BDNF group was the highest among experimental groups. The myelin thickness and axonal density of BDNF group was significantly greater than the other groups. Conclusion : BDNF gene transfected Schwann cells could regenerate the sciatic nerve gap(14mm) of rat successfully.

키워드

참고문헌

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