南方医科大学学报
南方醫科大學學報
남방의과대학학보
JOURNAL OF SOUTHERN MEDICAL UNIVERSITY
2013年
9期
1341-1346
,共6页
余常辉%陈燕%李婷%李维%蔡绍曦%孟莹
餘常輝%陳燕%李婷%李維%蔡紹晞%孟瑩
여상휘%진연%리정%리유%채소희%맹형
慢性肺阻塞%动物模型%高血压大鼠%吸烟
慢性肺阻塞%動物模型%高血壓大鼠%吸煙
만성폐조새%동물모형%고혈압대서%흡연
chronic obstructive pulmonary disease%animal models%spontaneously hypertensive rat%cigarette smoking
目的通过单纯烟熏法和烟熏联合气管内滴入脂多糖法建立符合慢性肺阻塞(COPD)病人病理生理特点的原发性高血压大鼠COPD模型,比较两种方法复制COPD模型的效果。方法将15只原发性高血压雄性大鼠随机分为3组,每组5只。其中一组为正常对照组,其他两组分别为单纯烟熏(CS)组和脂多糖联合烟熏(LPS+CS)组建立COPD模型组。八周后观察动物一般情况,测量大鼠肺功能,肺组织病理学;Western blot检测各组肺组织中肺泡表面活性物质结合蛋白A(SP-A)、核蛋白NF-κB、Histone、胞浆蛋白p-Iκ-Kα/β、Iκ-Kα/β、IκB-α蛋白表达;qRT-PCR检测TNF-α和IL-6 mRNA表达的变化。结果两个模型组大鼠消瘦,伴有间歇咳嗽和气促。有创肺功能检测CS组气道阻力(RI)较对照组增高,但差异无统计学意义;气峰流速(PEF)较对照组明显降低。LPS+CS组PEF明显低于对照组和CS组,而RI较对照组和CS组明显增高(P<0.05)。肺组织HE染色显示两个模型组大鼠均具有慢性支气管炎和肺气肿的典型病变,CS组和CS+LPS组平均肺泡数(MAN )明显低于对照组,而肺组织平均内衬间隔(ML I)和肺泡破坏指数(DI)明显高于对照组,差异有统计学意义(P<0.05);CS+LPS组ML I和DI值较CS组明显升高,MAN值较CS组明显降低,差异有统计学意义(P<0.05)。各组大鼠肺组织中,SP-A和IκB-α表达水平在CS+LPS组和CS组中表达较对照组明显减少(P<0.05),CS+LPS组较CS组明显减少(P<0.05);而NF-κB表达水平及Iκ-Kα/β的磷酸化水平表达在CS+LPS组和CS组中表达较Control组明显增加(P<0.05),CS+LPS组较CS组明显增加(P<0.05)。CS和CS+LPS组大鼠肺组织中TNF-α组和IL-6 mRNA表达水平较正常组明显增加(P<0.05),且CS+LPS组TNF-α和IL-6 mRNA表达水平较CS组明显增加(P<0.05)。结论烟熏加气管注内毒素及单纯熏香烟,在原发性高血压大鼠上可复制较理想的COPD模型,但烟熏加气管注内毒素较单纯熏香烟建立的COPD大鼠模型更为理想。
目的通過單純煙熏法和煙熏聯閤氣管內滴入脂多糖法建立符閤慢性肺阻塞(COPD)病人病理生理特點的原髮性高血壓大鼠COPD模型,比較兩種方法複製COPD模型的效果。方法將15隻原髮性高血壓雄性大鼠隨機分為3組,每組5隻。其中一組為正常對照組,其他兩組分彆為單純煙熏(CS)組和脂多糖聯閤煙熏(LPS+CS)組建立COPD模型組。八週後觀察動物一般情況,測量大鼠肺功能,肺組織病理學;Western blot檢測各組肺組織中肺泡錶麵活性物質結閤蛋白A(SP-A)、覈蛋白NF-κB、Histone、胞漿蛋白p-Iκ-Kα/β、Iκ-Kα/β、IκB-α蛋白錶達;qRT-PCR檢測TNF-α和IL-6 mRNA錶達的變化。結果兩箇模型組大鼠消瘦,伴有間歇咳嗽和氣促。有創肺功能檢測CS組氣道阻力(RI)較對照組增高,但差異無統計學意義;氣峰流速(PEF)較對照組明顯降低。LPS+CS組PEF明顯低于對照組和CS組,而RI較對照組和CS組明顯增高(P<0.05)。肺組織HE染色顯示兩箇模型組大鼠均具有慢性支氣管炎和肺氣腫的典型病變,CS組和CS+LPS組平均肺泡數(MAN )明顯低于對照組,而肺組織平均內襯間隔(ML I)和肺泡破壞指數(DI)明顯高于對照組,差異有統計學意義(P<0.05);CS+LPS組ML I和DI值較CS組明顯升高,MAN值較CS組明顯降低,差異有統計學意義(P<0.05)。各組大鼠肺組織中,SP-A和IκB-α錶達水平在CS+LPS組和CS組中錶達較對照組明顯減少(P<0.05),CS+LPS組較CS組明顯減少(P<0.05);而NF-κB錶達水平及Iκ-Kα/β的燐痠化水平錶達在CS+LPS組和CS組中錶達較Control組明顯增加(P<0.05),CS+LPS組較CS組明顯增加(P<0.05)。CS和CS+LPS組大鼠肺組織中TNF-α組和IL-6 mRNA錶達水平較正常組明顯增加(P<0.05),且CS+LPS組TNF-α和IL-6 mRNA錶達水平較CS組明顯增加(P<0.05)。結論煙熏加氣管註內毒素及單純熏香煙,在原髮性高血壓大鼠上可複製較理想的COPD模型,但煙熏加氣管註內毒素較單純熏香煙建立的COPD大鼠模型更為理想。
목적통과단순연훈법화연훈연합기관내적입지다당법건립부합만성폐조새(COPD)병인병리생리특점적원발성고혈압대서COPD모형,비교량충방법복제COPD모형적효과。방법장15지원발성고혈압웅성대서수궤분위3조,매조5지。기중일조위정상대조조,기타량조분별위단순연훈(CS)조화지다당연합연훈(LPS+CS)조건립COPD모형조。팔주후관찰동물일반정황,측량대서폐공능,폐조직병이학;Western blot검측각조폐조직중폐포표면활성물질결합단백A(SP-A)、핵단백NF-κB、Histone、포장단백p-Iκ-Kα/β、Iκ-Kα/β、IκB-α단백표체;qRT-PCR검측TNF-α화IL-6 mRNA표체적변화。결과량개모형조대서소수,반유간헐해수화기촉。유창폐공능검측CS조기도조력(RI)교대조조증고,단차이무통계학의의;기봉류속(PEF)교대조조명현강저。LPS+CS조PEF명현저우대조조화CS조,이RI교대조조화CS조명현증고(P<0.05)。폐조직HE염색현시량개모형조대서균구유만성지기관염화폐기종적전형병변,CS조화CS+LPS조평균폐포수(MAN )명현저우대조조,이폐조직평균내츤간격(ML I)화폐포파배지수(DI)명현고우대조조,차이유통계학의의(P<0.05);CS+LPS조ML I화DI치교CS조명현승고,MAN치교CS조명현강저,차이유통계학의의(P<0.05)。각조대서폐조직중,SP-A화IκB-α표체수평재CS+LPS조화CS조중표체교대조조명현감소(P<0.05),CS+LPS조교CS조명현감소(P<0.05);이NF-κB표체수평급Iκ-Kα/β적린산화수평표체재CS+LPS조화CS조중표체교Control조명현증가(P<0.05),CS+LPS조교CS조명현증가(P<0.05)。CS화CS+LPS조대서폐조직중TNF-α조화IL-6 mRNA표체수평교정상조명현증가(P<0.05),차CS+LPS조TNF-α화IL-6 mRNA표체수평교CS조명현증가(P<0.05)。결론연훈가기관주내독소급단순훈향연,재원발성고혈압대서상가복제교이상적COPD모형,단연훈가기관주내독소교단순훈향연건립적COPD대서모형경위이상。
Objective To establish a chronic obstructive pulmonary disease (COPD) model by passive cigarette smoking and (or) intratracheal instillation of lipopolysaccharide (LPS) in spontaneously hypertensive (SH) rats. Methods Fifteen male SH rats were randomly divided into control group, cigarette smoking exposure (CS) group and CS+LPS (cigarette smoking exposure plus intratracheal instillation of LPS) group. After 8 weeks' treatment, the COPD model was validated by inspecting the general condition and examining lung function and pulmonary pathological changes. The expressions of surfactant-associated protein A (SP-A), NF-κB, histone, p-Iκ-Kα/β, Iκ-Kα/β, and IκB-αwere determined with Western blotting, and the expression of TNF-αand IL-6 mRNA were measured using qRT-PCR. Results The rats in both CS and CS+LPS groups were marantic with intermittent cough and tachypnea. Lung function test showed increased RI and lowered peak expiratory flow in CS group, which were more prominent in CS+LPS group (P<0.05). HE staining demonstrated typical chronic bronchitic inflammation and emphysema in the lungs of the two model groups with significantly decreased mean alveolar number and significantly increased mean lining intermiment and destrction index. The emphysema level was more serious in CS+LPS group than in CS group. Western blotting showed markedly decreased expressions of SP-A and IκB-αin CS group and CS+LPS , especially the latter group. The protein levels of NF-κB, Iκ-K phosphorylation and mRNA expressions of TNF-α and IL-6 increased obviously in the two model groups. Conclusion COPD model can be established by passive smoking and (or) intratracheal instillation of LPS in SH rats, and the model induced by combined exposures is optimal.