Effects of BCG on Gastric Chief Cells of the Mouse Implanted with Ehrlich Carcinoma Cells

BCG가 Ehrlich 암세포를 이식한 생쥐 위점막 으뜸세포의 미세구조에 미치는 영향

  • Ryoo, In-Sang (Department of Anatomy, College of Medicine, Soonchunhyang University) ;
  • Ahn, E-Tay (Department of Anatomy, College of Medicine, Soonchunhyang University) ;
  • Park, Kyung-Ho (Department of Anatomy, College of Medicine, Soonchunhyang University) ;
  • Park, Dae-Kyoon (Department of Anatomy, College of Medicine, Soonchunhyang University) ;
  • Kim, Myeong-Soo (Department of Radiological Science, Division of Health Science, Hanseo University) ;
  • Ko, Jeong-Sik (Department of Anatomy, College of Medicine, Soonchunhyang University)
  • 류인상 (순천향대학교 의과대학 해부학교실) ;
  • 안의태 (순천향대학교 의과대학 해부학교실) ;
  • 박경호 (순천향대학교 의과대학 해부학교실) ;
  • 박대균 (순천향대학교 의과대학 해부학교실) ;
  • 김명수 (한서대학교 보건대학 방사선학과) ;
  • 고정식 (순천향대학교 의과대학 해부학교실)
  • Published : 2005.09.01

Abstract

This experiment was performed to evaluate the morphological responses of the gastric chief cells of the mouse, inoculated with Ehrlich carcinoma cells in the inguinal area, following administration of BCG (Bacillus Calmette-Guerin). Healthy adult ICR mice weighing 25 gm each were divided into normal and experimental groups (experimental control group and BCG treated group). In the experimental groups, each mouse was inoculated with $1x10^7$ Ehrlich carcinoma cells subcutaneously in the inguinal area. From next day after inoculations, 0.2 mL of saline or BCG (0.5 mL/25 g B.W.: $0.03{\times}10^8{\sim}0.32{\times}10^8$ CFU) were injected subcutaneously to the animals every other day, respectively. The day following the last injection, each mouse was sacrificed. Pieces of the tissue were taken from the stomach, prefixed with 2.5% glutaraldehyde-1.5% paraformaldehyde solution, followed by post-fixation with 1% osmium tetroxide solution. The ultrathin sections were stained with uranyl acetate and lead citrate. The size of zymogen granule and the size of the mitochondrion of the gastric chief cells were observed and calculated. In the BCG treated group, most chief cells did not show any difference in ultrastructure, except that myelin figures were more frequently observed, in comparison with that of nornmal control group. The size of zymogen granule in the gastric chief cells of normal control, experimental control and BCG-treated groups were $0.98({\pm}0.108){\mu}m,\;1.05({\pm}0.092){\mu}m\;and\;0.93({\pm}0.053){\mu}m$, respectively. And the mitochondrial size of the gastric chief cells of normal control, experimental control and BCG-treated groups were $0.80({\pm}0.130){\mu}m,\;0.83({\pm}0.143){\mu}m\;and\;0.72({\pm}0.078){\mu}m$, respectively. From the above results, it was concluded that BCG may slightly suppress function of the gastric chief cells.

이 연구는 생쥐의 샅부위에 Ehrlich 암세포를 이식한 후 BCG (Bacillus Calmette-Guerin)를 투여하였을 때, 위점막 으뜸세포의 미세구조에 미치는 영향을 알아보기 위하여 시행하였다. 실험동물로는 체중 25 g 내외의 ICR생쥐를 사용하였으며 정상대조군과 실험군으로 구분하였다. 정상대조군 이외의 실험군 동물들은 샅부위 피부밑조직에 각각 $1x10^7$개의 Ehrlich암세포를 이식한 후, 다음날부터 BCG 투여군은 BCG를 피부밑조직에 격일 간격으로 7회 투여했으며, 종양대조군은 암세포이식 후에 약제 대신 0.2 mL의 생리식염수를 피부밑조직에 격일간격으로 7회 주사하였고, 정상대조군은 암세포를 이식하지 않은 동물을 사용하였다. 모든 실험군은 마지막 주사한 다음날 오전 10시에서 11시 사이에 ether마취하에 앞배벽을 열어 위조직을 절취하였다. 절취한 조직은 통상적인 방법으로 전자현미경관찰을 위한 표본을 작성한 후, JEM 100 CX-II 전자현미경으로 비교 관찰하였다. 각 세포는 5,300 배율로 촬영한 후 3배로 확대 인화한 사진을 비교 관찰하였으며, 각 실험군마다 200개 이상의 과립의 지름과 사립체의 크기(장경)를 측정하였으며 student-t test를 이용하여 통계처리 하였다. BCG 투여군의 으뜸세포는 과립세포질세망과 골지복합체의 수조가 다소 팽대되고 수초구조가 다소 많이 관찰되는 이외는 정상대조군에 비해 큰 차이가 없었다. 으뜸 세포의 분비과립의 크기는 정상대조군, 종양대조군 및 BCG 투여군의 경우 각각 $0.98({\pm}0.108){\mu}m,\;1.05({\pm}0.092){\mu}m$$0.93({\pm}0.053){\mu}m$ 였다. 으뜸세포의 사립체의 크기는 정상대조군, 종양대조군 및 BCG 투여군이 각각 $0.80({\pm}0.130){\mu}m,\;0.83({\pm}0.143){\mu}m$$0.72({\pm}0.078){\mu}m$ 였다. 이상의 결과를 종합해보면 BCG를 반복 투여하면 위점막으뜸세포의 분비과립이 약간 작아지는 등 분비기능이 다소 억제되나 그 정도가 경미하여 으뜸세포의 분비기능에 큰 손상을 주지 않는 것으로 생각된다.

Keywords

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