实用肝脏病杂志
實用肝髒病雜誌
실용간장병잡지
JOURNAL OF CLINICAL HEPATOLOGY
2015年
2期
173-177
,共5页
江远%张玲%钟肖英%吴文如%何金洋
江遠%張玲%鐘肖英%吳文如%何金洋
강원%장령%종초영%오문여%하금양
肝纤维化%铁%去铁铵%肝星状细胞%库普弗细胞%大鼠
肝纖維化%鐵%去鐵銨%肝星狀細胞%庫普弗細胞%大鼠
간섬유화%철%거철안%간성상세포%고보불세포%대서
Liver fibrosis%Iron%Desferrioxamine%Hepatic stellate cell%Kupffer cell%Rats
目的:探讨铁沉积对大鼠肝纤维化影响的机制。方法随机将39只SD大鼠分为模型组和空白对照组,采用二甲基亚硝胺(DMN,10μL·kg-1)腹腔注射,制作大鼠肝纤维化模型。造模大鼠在注射DMN 1 w后,再将模型大鼠随机分为模型组(15只)和去铁铵组(12只)。两组大鼠分别自第3 w开始腹腔注射生理盐水或100 mg· kg-1去铁铵,3次/w,2 w后处死动物。取肝组织分别行HE染色、Masson染色、普鲁士蓝染色;采用免疫组化法检测肝组织α-平滑肌肌动蛋白(α-SMA)的表达;采用火焰原子吸收光谱法(FAAS)测定大鼠肝组织铁浓度(HIC);采用ELISA法检测大鼠血清铁蛋白、转铁蛋白;使用全自动生化分析仪检测肝功能、血清铁水平;采用PCR法检测肝组织转化生长因子(TGF)-β1 mRNA水平。结果肝组织病理学检查显示,伴随着胶原纤维的沉积、肝细胞变性坏死和肝星状细胞(HSC)大量活化,模型组大鼠铁负载显著增加;铁沿纤维间隔分布,主要沉积于库普弗细胞(KC)和HSC;模型组肝组织铁浓度为(0.778±0.098) mg/g,空白对照组为(0.436±0.043) mg/g,两组差别有统计学意义(LSD-t=5.15,P<0.01);去铁铵组为(0.595±0.146) mg/g,显著低于模型组(LSD-t=-2.76,P<0.05);模型组血清铁蛋白和转铁蛋白分别为(47.657±27.851) ng/mL和(0.322±0.099) mg/mL,空白对照组分别为(24.166±27.626) ng/mL和(0.653±0.170) mg/mL,去铁铵组分别为(10.261±12.466) ng/mL和(0.584±0.180) mg/mL,说明模型组铁蛋白明显增加,血清转铁蛋白明显减少,与空白对照组比较,差异均有统计学意义(LSD-t=2.21和-4.78,P<0.05和P<0.01);去铁铵能明显降低血清铁蛋白水平,增加血清转铁蛋白水平,与模型组比较差异有统计学意义(LSD-t=-3.52和3.77,P<0.05和P=0.01);模型组肝组织TGF-β1mRNA水平为(11.896±0.63),空白对照组为(2.292±0.222),两组差别有统计学意义(LSD-t=25.95,P<0.01),去铁铵组为(7.481±0.745),显著低于模型组(LSD-t=-11.95,P<0.01)。结论铁沉积对肝纤维化的发生发展起到重要作用,其机制可能与铁沉积于KC和HSC并促进HSC活化有关。
目的:探討鐵沉積對大鼠肝纖維化影響的機製。方法隨機將39隻SD大鼠分為模型組和空白對照組,採用二甲基亞硝胺(DMN,10μL·kg-1)腹腔註射,製作大鼠肝纖維化模型。造模大鼠在註射DMN 1 w後,再將模型大鼠隨機分為模型組(15隻)和去鐵銨組(12隻)。兩組大鼠分彆自第3 w開始腹腔註射生理鹽水或100 mg· kg-1去鐵銨,3次/w,2 w後處死動物。取肝組織分彆行HE染色、Masson染色、普魯士藍染色;採用免疫組化法檢測肝組織α-平滑肌肌動蛋白(α-SMA)的錶達;採用火燄原子吸收光譜法(FAAS)測定大鼠肝組織鐵濃度(HIC);採用ELISA法檢測大鼠血清鐵蛋白、轉鐵蛋白;使用全自動生化分析儀檢測肝功能、血清鐵水平;採用PCR法檢測肝組織轉化生長因子(TGF)-β1 mRNA水平。結果肝組織病理學檢查顯示,伴隨著膠原纖維的沉積、肝細胞變性壞死和肝星狀細胞(HSC)大量活化,模型組大鼠鐵負載顯著增加;鐵沿纖維間隔分佈,主要沉積于庫普弗細胞(KC)和HSC;模型組肝組織鐵濃度為(0.778±0.098) mg/g,空白對照組為(0.436±0.043) mg/g,兩組差彆有統計學意義(LSD-t=5.15,P<0.01);去鐵銨組為(0.595±0.146) mg/g,顯著低于模型組(LSD-t=-2.76,P<0.05);模型組血清鐵蛋白和轉鐵蛋白分彆為(47.657±27.851) ng/mL和(0.322±0.099) mg/mL,空白對照組分彆為(24.166±27.626) ng/mL和(0.653±0.170) mg/mL,去鐵銨組分彆為(10.261±12.466) ng/mL和(0.584±0.180) mg/mL,說明模型組鐵蛋白明顯增加,血清轉鐵蛋白明顯減少,與空白對照組比較,差異均有統計學意義(LSD-t=2.21和-4.78,P<0.05和P<0.01);去鐵銨能明顯降低血清鐵蛋白水平,增加血清轉鐵蛋白水平,與模型組比較差異有統計學意義(LSD-t=-3.52和3.77,P<0.05和P=0.01);模型組肝組織TGF-β1mRNA水平為(11.896±0.63),空白對照組為(2.292±0.222),兩組差彆有統計學意義(LSD-t=25.95,P<0.01),去鐵銨組為(7.481±0.745),顯著低于模型組(LSD-t=-11.95,P<0.01)。結論鐵沉積對肝纖維化的髮生髮展起到重要作用,其機製可能與鐵沉積于KC和HSC併促進HSC活化有關。
목적:탐토철침적대대서간섬유화영향적궤제。방법수궤장39지SD대서분위모형조화공백대조조,채용이갑기아초알(DMN,10μL·kg-1)복강주사,제작대서간섬유화모형。조모대서재주사DMN 1 w후,재장모형대서수궤분위모형조(15지)화거철안조(12지)。량조대서분별자제3 w개시복강주사생리염수혹100 mg· kg-1거철안,3차/w,2 w후처사동물。취간조직분별행HE염색、Masson염색、보로사람염색;채용면역조화법검측간조직α-평활기기동단백(α-SMA)적표체;채용화염원자흡수광보법(FAAS)측정대서간조직철농도(HIC);채용ELISA법검측대서혈청철단백、전철단백;사용전자동생화분석의검측간공능、혈청철수평;채용PCR법검측간조직전화생장인자(TGF)-β1 mRNA수평。결과간조직병이학검사현시,반수착효원섬유적침적、간세포변성배사화간성상세포(HSC)대량활화,모형조대서철부재현저증가;철연섬유간격분포,주요침적우고보불세포(KC)화HSC;모형조간조직철농도위(0.778±0.098) mg/g,공백대조조위(0.436±0.043) mg/g,량조차별유통계학의의(LSD-t=5.15,P<0.01);거철안조위(0.595±0.146) mg/g,현저저우모형조(LSD-t=-2.76,P<0.05);모형조혈청철단백화전철단백분별위(47.657±27.851) ng/mL화(0.322±0.099) mg/mL,공백대조조분별위(24.166±27.626) ng/mL화(0.653±0.170) mg/mL,거철안조분별위(10.261±12.466) ng/mL화(0.584±0.180) mg/mL,설명모형조철단백명현증가,혈청전철단백명현감소,여공백대조조비교,차이균유통계학의의(LSD-t=2.21화-4.78,P<0.05화P<0.01);거철안능명현강저혈청철단백수평,증가혈청전철단백수평,여모형조비교차이유통계학의의(LSD-t=-3.52화3.77,P<0.05화P=0.01);모형조간조직TGF-β1mRNA수평위(11.896±0.63),공백대조조위(2.292±0.222),량조차별유통계학의의(LSD-t=25.95,P<0.01),거철안조위(7.481±0.745),현저저우모형조(LSD-t=-11.95,P<0.01)。결론철침적대간섬유화적발생발전기도중요작용,기궤제가능여철침적우KC화HSC병촉진HSC활화유관。
Objective To investigate the effects of iron deposition on the liver fibrosis and its potential mechanisms in rats. Methods 39 SD rats were randomly divided into fibrosis group (n=27) and control group (n=12). Rats with hepatic fibrosis (n=27) were established by intraperitoneal injection of dimethylnitrosamine (DMN,10 μL.kg-1). After one-week DMN injection,the 27 rats were randomly divided into model group (n=15) and desferrioxamine group (n=12). At the beginning of the third week,rats in model and desferrioxamine group were respectively injected intraperitoneally with normal saline or desferrioxamine at the dose of 100 mg·kg-1·d-1,3 times per week for 2 weeks before they were sacrificed. Liver tissues were stained with HE,Masson and Prussian blue,respectively;Immunohistochemistry was applied for the detection of α-smooth muscle actin (α-SMA) expres-sion;Hepatic iron concentration (HIC) in liver tissues were evaluated by flame atomic absorption spectrophotome-try (FAAS);ELISA was adopted to examine the concentrations of serum ferritin and transferrin. Automatic bio-chemical analyzer was used to detect the liver func-tion and the serum level of iron. The mRNA levels of transforming growth factor-β1 (TGF-β1) was de-tected by quantitative PCR. Results Our histopatho-logical findings showed that iron loads in liver tissues in model group increased obviously,accompanied with excessive collagen deposition,hepatocyte denaturation and necrosis and activation of a great number of hepatic stellate cells (HSCs) and the iron distributed in fibrous septa with main deposition in Kupffer cells(KCs)and HSCs;The hepatic iron concentration in model group [(0.778± 0.098) mg/g] was higher than that in control group[(0.436±0.043) mg/g,LSD-t=5.15,P<0.01] and than in desfer-rioxamine group[(0.595±0.146) mg/g,LSD-t=-2.76,P<0.05];Compared with in control,the level of serum ferritin in model group significantly increased,and the level of serum transferrin obviously decreased [ferritin,(47.657±27.851) ng/mL vs.(24.166±27.626) ng/mL,LSD-t=2.21,P<0.05;transferrin,(0.322±0.099) mg/mL vs.(0.653±0.170) mg/mL, LSD-t=-4.78,P<0.01];Compared with in the model group,the serum level of ferritin had reduced and the serum level of transferrin increased in desferrioxamine group [ferritin,(10.261±12.466) ng/mL vs. (47.657±27.851) ng/mL,LSD-t=-3.52,P<0.01;transferrin,(0.584 ±0.180) mg/mL vs.(0.322 ±0.099) mg/mL,LSD-t=3.77,P=0.01];Com-pared with in control,TGF-β1 mRNA in model group was significantly up-regulated [(11.896±0.639)vs.(2.292±0.222), LSD-t=25.95,P<0.01],which decreased as compared with in desferrioxamine group[(7.481±0.745),LSD-t=-11.95, P<0.01]. Conclusion Iron deposition in the liver may play an important role in the onset and development of hepatic fibrosis. The potential mechanism might be related to iron deposition in KCs and HSCs ,facilitating the ac-tivation of HSCs.