摘要
目的探讨Wilson病的临床病理学特征及其肝纤维化机制。方法对48例临床资料完整并行肝穿刺检查的Wilson病例做临床和实验室资料分析。采用光镜观察、电镜观察、Rhodanine/Rubeanicacid铜染色及网状纤维和胶原纤维染色探讨Wilson病的病理学特点;应用免疫组织化学方法观察肝组织内金属蛋白酶组织抑制因子TIMP1、TIMP2的表达,并以原位末端标记与αSMA免疫组织化学双标记法观测肝星状细胞(HSC)的活化与凋亡状况。结果本组患者发病年龄10.0±3.8岁,有家族史者29.2%,K F环阳性68.8%,血清铜蓝蛋白和铜氧化酶异常分别为93.0%和95.0%,血清ALT、AST、ALP、及GGT均值分别为正常上限值3.6、3.0、2.7和2.0倍。肝脏主要病变表现为汇管区及小叶内不同程度慢性炎症及界面炎,肝细胞小泡/微泡或大、小泡混合性脂肪变性,77.0%肝细胞内呈较弥漫性铜颗粒沉积,以腺泡I带肝细胞为甚,可见大而不整的凋亡小体、糖原核肝细胞、Mallory小体及嗜伊红颗粒肝细胞;超微观察示肝细胞内可见肿胀或怪异线粒体,溶酶体颗粒增多,并见泡状圆形包涵体。本组病例均存在不同程度肝纤维化,表现为早期汇管区扩大,中期纤维间隔形成及晚期肝硬化改变。活动性病变肝组织内,尤其在铜颗粒沉积明显区域活化HSC数目明显增加,凋亡减少,TIMP1。
Objective To explore the clinical pathological features of Wilson's disease and the pathogenesis of liver fibrosis. Methods The clinical data and liver biopsy specimens obtained from 48 children with Wilson's disease were analysed. The pathological changes were studied with light microscopy, electron microscopy, combined with rhodanine and rubeanic acid for copper staining, Gordon-Sweet's staining for reticular fibers and Masson's staining for collagen fibers. Meanwhile, immunohistochemistry was used to investigate the expression of tissue inhibitors of metalloproteinase (TIMP) -1 and TIMP-2. The apoptosis of activated hepatic stellate cells (HSC) in liver tissues was illustrated with in situ end labeling (ISEL)(TUNEL POD method) and α-SMA double staining. Results In all the cases, the mean onset age was 10.0±3.8 years, and the positive rates of family history, Kayser-Fleischer’s ring and decreased serum ceruloplasmin level were 29.2%, 68.8% and 93.0%, respectively. The levels of serum ALT, AST, ALP and γ-Glo were 3.6, 3.0, 2.7 and 2.0 fold of normal cutoff values. The major pathological changes in childhood patients with Wilson’s disease presented various chronic inflammatory changes in hepatic acini and portal tracts, interface hepatitis, focal or diffuse vesicular/ microvesicular steatosis, with large and irregular apoptotic bodies, Mallory's bodies, glycogenated nuclei, and eosinophilc granular hepatocytes. Among all the cases, 77.0% of liver specimens were positive for rhodanine and rubeanic acid staining for copper in hepatocyts, especially in the zone I of acinus. Ultrastructural observation showed swollen and unusual giant mitochondria, increased lysosomes and vesicular inclusions in hepatocytes. The incidence of hepatic fibrosis was 100%, presenting expanded portal tracts in the early, fibrotic septa in the moderate and cirrhosis in the late stage. The extent of TIMP-1 and TIMP-2 expression and number of activated HSC were increased in various degrees in all the liver specimens, while apoptotic HS
出处
《解放军医学杂志》
CAS
CSCD
北大核心
2005年第4期300-302,共3页
Medical Journal of Chinese People's Liberation Army
