Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Histological Study of Rat Olfactory Mucosa following Inhalation of Xylene

자일렌이 흡입된 흰쥐 후각점막에 대한 조직학적 연구

  • Moon, Yong-Suk (Department of Anatomy, College of Medicine, Catholic University of Daegu)
  • 문용석 (대구가톨릭대학교 의과대학 해부학교실)
  • Received : 2018.07.20
  • Accepted : 2018.08.23
  • Published : 2018.09.30
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Abstract

The purpose of this study was to investigate the structure and the glycoconjugate properties of the olfactory mucosa in the rat after inhalation of xylene. Sprague-Dawley male rats were inhalated 300 ppm xylene for 5 times with 5 hours exposure. The olfactory mucosa in the nasal cavity was taken from the animals on 5, 10, 15, 20, and 30 days after inhalation of xylene. The properties of the glycoconjugates in the olfactory mucosa were investigated using 10 biotinylated lectins: (PSA, UEA I, PHA-L, GSL I B4, GSL I, PNA, ECL, SBA, GSL II, and sWGA). In the experimental groups, degenerative changes of the olfactory epithelium were observed until 20 days after inhalation of xylene. In the control group, the olfactory cells in the olfactory epithelium reacted with PSA, UEA I, PNA, SBA, and sWGA, the supporting cells reacted with PSA, PHA-L, GSL I, PNA, ECL, SBA, GSL II, and sWGA, and the Bowman's glands reacted with all 10 lectins. In the experimental groups, the reactivity to PSA, PNA, and SBA in the olfactory cells were decreased, and the reactivity to PSA, PNA, SBA, and GSL II in the supporting cells were decreased. And in the Bowman's gland, the reactivity to PSA, UEA I, GSL I, and sWGA were decreased. Conclusively, the olfactory mucosa was shown a lot of changes in the structure through degenerative process and in the properties of the glycoconjugates after inhalation of xylene. These results suggest that the sugar residues of the glycoconjugates in the olfactory mucosa can be changed by xylene inhalation.

자일렌이 흡입된 흰쥐 후각점막의 구조와 복합당질 특성을 조사할 목적으로 Sprague-Dawley계 수컷 흰쥐를 사용하여 300 ppm의 자일렌을 하루에 5시간씩 5일간 흡입시키고 30일까지 회복시켰다. 자일렌 흡입에 대한 후각점막의 형태적 변화를 비교하였고, PSA, UEA I, PHA-L, GSL I B4, GSL I, PNA, ECL, SBA, GSL II 및 sWGA의 10종류 렉틴을 이용한 렉틴조직화학을 실시하여 복합당질의 특성을 비교하였다. 자일렌 흡입 후 20일까지 후각상피는 상피세포의 수와 상피의 높이가 감소되는 퇴행성 변화를 보였다. 대조군에서 후각상피의 후각신경세포는 PSA, UEA I, PNA, SBA 및 sWGA에서, 지지세포는 PSA, PHA-L, GSL I, PNA, ECL, SBA, GSL II 및 sWGA에서, 그리고 후각샘은 10종류의 모든 렉틴에서 양성반응이 관찰되었다. 실험군에서 후각신경세포는 PSA, PNA 및 SBA에서 반응성이 감소하였고, 지지세포는 PSA, PNA, SBA 및 GSL II에서 반응성이 감소하였으며, 후각샘은 PSA, UEA I, GSL I 및 sWGA에서 그 반응성이 감소하였다. 결론적으로, 자일렌에 노출된 후각점막은 구조와 복합당질양상이 대조군에 비하여 많은 변화를 나타내었다. 이상의 결과들은 후각점막의 복합당질 당잔기가 자일렌 흡입 후에 변화할 수 있음을 시사한다.

Keywords

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