| CHANGE OF VASOACTIVE INTESTINAL POLYPEPTIDE(VIP) IMMUNOREACTIVE CELLS FOLLOWING PULP EXTIRPATION IN RAT TRIGEMINAL GANGLION: A CONFOCAL LASER SCANNING MICROSCOPIC STUDY |
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| 치수제거 후 흰쥐 삼차신경절에서 VIP 면역반응세포의 변화: 공초점레이저주사현미경적 연구 |
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김흥중1, 김승재1, 박주철1, 이창섭2, 이상호2 |
1조선대학교 치과대학 구강생물학연구소
2조선대학교 치과대학 소아치과학교실 |
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| Abstract |
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The purpose of this study was to investigate the distribution and fluorescence intensity of vasoactive intestinal polypeptide immunoreactive (VIP-IR) cells in rat trigeminal ganglion following pulp extirpation of rat mandibular molar. The animals were divided into control group(n=6) and experimental group(n=6). The experimental animals were sacrificed at 14 days after pulp extirpation. The trigeminal ganglion was removed and immersed in the 4% paraformaldehyde in 0.1M phosphate buffer. Serial frozen sections about 20μm in thickness were cut with a cryostat. The immunofluorescence staining was performed. The rabbit anti-VIP(1 : 8,000) was used as primary antibody and fluorescene isothiocynate(FITC) conjugated anti-rabbit IgG(1 : 80) as secondary antibody. The slides were observed under confocal laser scanning microscope (CLSM). Unprocessed optical sections were obtained and stored on a optical disk. Color pictures were printed by a video copy processor. The results were as follows; 1. The positive ratio of VIP-IR cells in mandibular part of trigeminal ganglion were 7.40% in control group and 28.42% in experimental group(14 days after pulp extirpation). 2. The relative fluorescence intensity of VIP-IR cells in mandibular part of trigeminal ganglion were 87.78 in control group and 138.65 in experimental group. The relative fluorescence intensity of experimental group was 58% higher than that of control group. 3. In optical serial section analysis of VIP-IR cells of experimental group, most of the 9 sections showed high fluorescence intensity. At high magnification, axons of the experimental group displayed greater VIP-IR than in the control group, and the positive cells were mainly of medium size. The result indicate that number and fluorescence intensity of VIP-IR cells were increased in the mandibular part of trigeminal ganglion following pulp extirpation of mandibular molar, and it suggests that VIP could play a role in processing of nociception. |
| Key Words:
Trigeminal ganglion, Pulp extirpation, VIP, CLSM |
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