重症肌无力伴胸腺瘤32例病理与临床分析

目的：探讨重症肌无力（MG）伴胸腺瘤的病理与临床关系。方法：分析32例MG伴胸腺瘤手术切除后病理学改变与临床表现。结果：32例MG伴胸腺瘤Osserman分型：I型3例（9．3％）,Ⅱa型8例（23．5％）,Ⅱb型14例（43．8％）,Ⅲ型4例（12．5％）,Ⅳ型2例（6．25％）和Ⅴ型1例（4．65％）,Masaoka分期：Ⅰ期10例（31．25％）,Ⅱ期14例（43．75％）,Ⅲ期8例（25％）,病理分型：上皮细胞型16例（50％）,淋巴细胞型5例（15．6％）,混合细胞型9例（28．1％）,梭形细胞型2例（6．25％）,结论：MG伴胸腺瘤的病理分型以上皮细胞型和混合细胞型为主,分期为Ⅰ,Ⅱ期为主,临床分型以Ⅱa,Ⅱb为主。危象发生率,死亡率以恶性胸腺瘤伴MG为高。     

大鼠去势后胸腺变化的组织学及超微结构的观察

目的：探讨去势对大鼠胸腺淋巴细胞超微结构与细胞功能的影响。方法：分别于去势大鼠术后2周、4周、6周、8周后,取胸腺组织进行HE染色和透射电镜观察。结果：实验表明去势导致胸腺淋巴细胞结构坏死,或者细胞器严重受损。结论：去势后胸腺淋巴细胞形态和功能均受到损害。     

小鼠胸腺基质细胞株MTECB的细胞学特性

用免疫组织化学和透射电镜技术对本室所建立的小鼠胸腺基质细胞株ＭＴＥＣＢ进行了细胞学鉴定。免疫组织化学观察显示：４０ｋＤ、４５ｋＤ角蛋白和波形蛋白呈现强阳性，５２ｋＤ，５４ｋＤ，５８ｋＤ角蛋白和Ｓ－１００蛋白呈现阴性。电镜下见到，具有桥粒和张力丝结构，含较多的囊泡和髓样体，发达的高尔基复合体和线粒体。另外ＭＴＥＣＢ还表现为酸性磷酸酶、碱性磷酸酶、非特异性酯酶弱阳性。据此我们认为ＭＴＥＣＢ为上皮细胞来     

当归多糖体外免疫调节作用的实验研究

当归多糖（ＡＳＰ）单独对小鼠脾淋巴细胞有明显促进增殖作用，促进增殖刺激指数最大为１７．５０，并且与ＣｏｎＡ、ＬＰＳ有协同促进小鼠脾淋巴细胞增殖作用当归多糖单独对小鼠胸腺细胞无促进增殖作用，但对由亚适剂量ＣｏｎＡ活化的小鼠胸腺细胞有明显促进增殖作用。此外，当归多糖体外可对抗氢化可的松对小鼠胸腺细胞增殖抑制作用。     

胸腺和胸腺素研究进展

胸腺是免疫系统中重要的中枢免疫器官，可分泌数十种胸腺素以调节其免疫功能的作用，胸腺素类制剂目前已成为人们十分关注的免疫增强剂，目前临床上应用的胸腺素类制剂均是多种肽类的混合物。有的胸腺因子仅来源于胸腺，如ＦＴＳ，ｐｒｏＴα，ＴＨＦγ２、胸腺生成素等。天然和人工合成的这些因子具有广阔的应用前景。     

胸腺因子D对实验性大鼠肝纤维化防治作用的研究

目的　研究胸腺因子D(TFD)的体内抗肝纤维化作用。方法　用四氯化碳 (CCL4 )复制大鼠肝纤维化模型 ;造模开始或造模 30d后予TFD ;实验结束后分别测定肝功能、纤维化指标 (Ⅲ型前胶原、透明质酸和层粘连素 )、肝组织中谷胱甘肽、超氧化物岐化酶及丙二醛含量 ,并作肝病理检查。结果　TFD可显著减轻CCl4 肝纤维化程度 ,能明显降低血清Ⅲ型前胶原、透明质酸、层粘连素和肝组织中丙二醛含量 ;显著提高谷胱甘肽和超氧化物岐化酶活性 ,改善肝功能 ,组织学检查亦显示具有抗肝纤维化作用。结论　TFD在体内具有抗肝纤维化的作用 ,可望用于肝纤维化的防治。     

Adaptive response of thymocyte apoptosis and cell cycle progression induced by low dose X-ray irradiation in mice

The dose-effect of adaptive response of thymocyte apoptosis and cell cycle progression induced by whole-body X-ray irradiation (WBI) was studied in male Kunming mice. The inductive doses (D1) were 25, 50, 75, 100 or 200 mGy 6 h before the challenging doses (D2) of 1.0, 1.5 or 2.0 Gy. The changes in the percentages of the thymocyte apoptotic bodies (TAB) and the cells in different phases of cell cycle were measured with flow cytometry. The percentages of TAB decreased, the arrests of G1 and G2 + M phases diminished, and the cells of DNA synthesis of S phase increased when the D1 + D2 groups was compared with the D2 groups. When D1 was 200 mGy, the adaptive response of thymocyte apoptosis and cell cycle progression were no longer induced by low dose radiation (LDR). In addition, the extracellular fluid from the splenocytes were cultured with Con A for 48 h in vitro 24 h after 75 mGy WBI was placed in the murine thymocyte suspension from mice irradiated with 2.0 Gy WBI and co-incubated. The thymocyte apoptosis decreased. Especially, noteworthy was that the percentages of TAB after the incubation for 72 h were significantly lower than those in 2.0 Gy irradiated thymocytes (P < 0.05). These results indicate that when the mice were irradiated with 25-100 mGy (D1, 12.5 mGy/min) 6 h before 1.0-2.0 Gy (D2, 0.287 Gy/min) exposure, an adaptive response of thymocyte apoptosis and cell cycle progression may be induced under the condition of WBI, and LDR (75 mGy) may change the microenvironment of immune cells and decrease the thymocyte apoptosis.     

蝎毒抗癌多肽纯化组分Ⅲ对小鼠肝癌的生长抑制作用及带 …

目的：观察蝎毒抗癌多肽纯化组分Ⅲ地小鼠肝癌的生长抑制作用及对带瘤小鼠胸腺重量的影响。方法：将接种Ｈ２２细胞２４ｈ后的昆明咱小鼠６５只,随机分为５组;５－Ｆｕ组１０只;ＡＰＢＭＶ组１０只;ＡＰ－Ⅲ实验组,每组１０只;非正常对照组２５只,均腹腔注射给药,１次／ｄ连续给药１０ｄ。于末产欠给药２４ｈ后,颈椎脱臼处死小鼠,离肿瘤和胸腺,称重,并作数据处理。结果：ＡⅢ实验组和ＡＰＢＭＶ组对Ｈ２２有明显的抑制作