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난소절제 생쥐 구강점막 상처회복 과정에서 SLPI의 발현

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Author(s)
박진주
Issued Date
2011
Abstract
상처회복은 응혈, 염증, 재상피화, 육아조직의 형성, 기질 재형성의 연속적인 과정에 의해 진행 된다. 에스트로겐은 염증반응, 사이토카인의 발현, 기질 침착을 조절하여 재상피화 촉진과 혈관형성, 상처 수축을 자극하여 상처회복 과정을 증가시킨다. 난소절제 시술(ovariectomized, OVX)에 의한 에스트로겐 분비의 결여는 상처회복 과정을 지연시킨다. 분비백혈구단백분해효소억제제(secretory leukocyte protease inhibitor, SLPI)는 세린계열의 단백분해효소 억제분자로서, 상처회복 과정 동안 호중구 엘라스타제의 활성을 조절하여 과도한 염증반응을 억제하여 피부와 구강점막의 상처회복을 촉진한다. 에스트로겐에 의해 증가되는 SLPI의 발현과 분비는 염증성 사이토카인의 분비를 억제한다. 따라서, SLPI와 에스트로겐은 상처회복 과정에서 밀접한 관계를 가질 것으로 생각되고 조직형태학적 분석, 역전사 중합효소반응, 면역화학적 단백질검출법, 면역조직화학적염색, 젤라틴 자이모그래피와 엘라스타제 활성측정법 등을 이용하여 OVX 생쥐 모델에서 구강점막 상처회복 과정 동안 SLPI의 발현과 기능을 규명하고자 하였다. 본 연구에서 OVX 생쥐의 구강점막 상처는 상처 면적의 증가, 과도한 염증세포의 유입, 교원질 침착이 감소 함으로써 회복이 지연되었다. OVX 상처회복 과정 중 TGF-β1과 교원질의 발현은 낮았고 fibronectin의 발현은 정상그룹보다 높았다. 엘라스타제, MMP-2와 MMP-9의 활성도는 OVX 상처군에서 낮았고, SLPI의 발현은 증가되었다.
본 연구와 다른 연구결과들을 비교해 보면 SLPI는 OVX 구강 상처에서 과도한 염증반응과 비정상적인 교원질 침착을 억제하는 역할을 하지만 상처회복을 촉진시키기에는 충분한 역할을 하지 못했다. 따라서, 본 연구의 결과로 SLPI는 OVX 모델의 구강상처 부위의 회복 과정에서 전신적 조절 인자라기 보다는 국소적 인자로서 작용할 것으로 생각된다.|Wound healing consists of continuous processes including coagulation, inflammation, re-epithelialization, granulation tissue, matrix remolding, sequentially. Estrogen increases wound healing by modulating the inflammatory response, cytokine expression and matrix deposition, promoting re-epithelialization, stimulating angiogenesis and wound contraction. The systemic depletion of estrogen level such as ovariectomy (OVX) leads to delayed wound healing. Secretory leukocyte protease inhibitor (SLPI) is serine protease inhibitor, which promotes wound healing of skin and oral mucosa by controlling the activity of neutrophil elastase for inhibition of excessive inflammatory response during wound healing processes. SLPI expression and secretion is increased by estrogen and this regulation inhibits the secretion of pro-inflammatory cytokines. Therefore, we hypothesized that SLPI and estrogen may have a close relation on wound healing and investigated the expression and function of SLPI during oral mucosa healing process of OVX animal model using the histomorphometrical analysis, RT-PCR, western blotting, immunohistochemistry, gelatin zymography and elastase activity.
As a result, oral mucosa wound healing in OVX mouse is delayed as showed that increased wound area, excessive infiltration of inflammatory cell, decreased collagen deposition. The expression of TGF-β1 and collagen was low and fibronectin was high in OVX wound compared that normal group. The activity of elastase, MMP-2, and MMP-9 was low and SLPI expression was up-regulated in OVX wound. On the basis of previous and our results, the increased SLPI in the OVX oral wound is associated with the prevention of an excessive inflammatory response and aberrant collagen deposition but it is not enough to accelerate OVX oral wound healing. In conjunction with our and other reports, it is known that SLPI promotes wound healing. Therefore, SLPI may act as a local rather than a systemic modulating molecule in OVX mouse oral wounds.
Alternative Title
Expression of secretory leukocyte protease inhibitor (SLPI) in oral mucosal healing on the ovariectomized (OVX) mice wound
Alternative Author(s)
Park,Jin Ju
Affiliation
구강조직학교실
Department
일반대학원 구강조직학
Advisor
정문진
Awarded Date
2012-02
Table Of Contents
LIST OF FIGURES……………………………………………….……………………iii
ABBREVIATIONS……………………………………………………………………...iv
ABSTRACT IN KOREAN…………………..……………………………………v
I. INTRODUCTION…………………………………………………………………...1
II. MATREIALS AND METHODS ………………………..………………5
II-1. Induction of the ovariectomized (OVX) condition……….5
II-2. Induction of the oral mucosa wound……………………….……..5
II-3. Histology and histomorphometrical analysis ….…………..6
II-4. Extraction of total RNA and reverse transcription
and polymerase chain reaction.…………………..…………..…….…7
II-5. Western blotting ………………………………………………….……….….9
II-6. Gelatin zymography ……………………………………….………….……10
II-7. Immunohistochemistry……………………………………………………10
II-8. Elastase activity…………………………………….………………………...12
II-9. Statistical analysis…………………………….…………..…………….…..12
III. RESULTS ……………………………………………………………………….……13
III-1. Wound distance…….……………..…………………….………………........13
III-2. Infiltrated inflammatory cell…………………………………..…..…13
III-3. Collagen deposition ………………..…………………………..……..…..13
III-4. Differential expression of type I collagen and
fibronectin mRNA ……………………………….……..…….…………......14
III-5. Expression of MMP-2 and MMP-9…………………………......14
III-6. Differential expression of SLPI mRNA and protein…..15
III-7. Expression of TGF-β1 mRNA and protein………..…….....16
IV. DISCUSSION ……………………………………………….……………….…......17
REFERENCES………………………………….…………………..…………….……….25
FIGURE LEGENDS…………………….……………………..………………....…....36
FIGURES ……………………………………………………………..……...………….…....39
ABSTRACT………………………………………………………….……………….……..51
ACKNOWLEDGEMENT……….………...……………………………………..53
Degree
Master
Publisher
조선대학교 대학원
Citation
박진주. (2011). 난소절제 생쥐 구강점막 상처회복 과정에서 SLPI의 발현.
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/9312
http://chosun.dcollection.net/common/orgView/200000256665
Appears in Collections:
General Graduate School > 3. Theses(Master)
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