人食管不典型增生上皮与原位癌的计算机纹理分析研究

采用计算机图象纹理分析和相关点阵检测技术,对人食管正常粘膜、不典型增生上皮及原位癌的不同纹理特征进行了观察。观察样品为常规病理切片,用计算机图象分析系统检测了组织的纹理特征。对受检图象建立了三种灰色分层关系矩阵,同时计算了8种纹理测度。结果显示,在重度不典型增生上皮和原位癌之间,其纹理测度和相关点阵检测数据均有显著性差异(P<0.05)。全部测量数据经计算机多元逐步判别分析,其正判率达90%以上。本研究结果表明,计算机纹理分析方法可正确地判别食管癌前病变和原位癌的组织结构异型性。提示本技术在食管癌的早期诊断方面具有肯定的实用性价值。     

食管癌发生中不同标志Langerhans细胞的比较

分别采用组织化学和免疫组织化学方法，观察５７例人食管癌切除标本中ＡＴＰ酶阳性和ｓ－１００蛋白阳性Ｌａｎｇｅｒｈａｎｓ细胞（ＬＣ）的形态和分布。结果２种方法均可地显示食管正常粘膜上皮、不典型增生上皮、原位癌及鳞状细胞癌组织中的ＬＣ。ＬＣ的形态随所处组织的病变不同而有所改变。部分与ＬＣ密切接触的癌细胞呈现变性的形态改变。除形态变化外，在不同的病变组织中，ＬＣ的数量均不相同。但２种标志的ＬＣ分布趋势基本     

CD44+/CD24-细胞在乳腺癌组织及细胞系中的数量与分布

Objective To study the distribution and quantity of CD44VCD24- cells in breast cancer tissue and the cell lines,and as well as its correlation with the expression of various breast cancer markers and molecular subtyping of breast carcinoma.Methods The expression of CD44 / CD24,estrogen receptor,progesterone receptor,HER2,human estrogen-induced protein PS2,bcl-2 and nm23 in 60 cases of invasive ductal carcinoma of breast were studied by either single or double immunohistochemical staining.The co-expression of CD44 and CD24 in 3 breast cancer cell lines (MCF-7,MDA-MB-468,and MDA-MB- 231) was also examined.Results The quantity and distribution of CD44 + /CD24- cells varied greatly and no specific patterns were identified.The percentage of CD44 + /CD24- in breast cancer was 65%.The amount of CD44+/CD24- cells did not correlate with the age of patients,lymph node metastasis,tumor　 size,molecular subtypes and expression of various breast cancer markers in breast carcinoma.The proportion of CD44+/CD24- cells in MCF-7,MDA-MB-468,and MDA-MB-231 cell lines was < 1%,5% and > 80% ,respectively.Conclusions CD44+ /CD24- cells are demonstrated in certain breast cancer tissues and cell lines.However,there is no relationship obtained between the quantity or the distribution of these cells and the molecular subtyping or the clinicopathologic parameters in breast cancer.     

食管鳞癌组织中NDRGl mRNA和蛋白的表达

目的:探讨食管鳞癌组织中NDRG1 mRNA和蛋白的表达情况及其与临床病理因素的关系.方法:分别采用RT-PCR和免疫组织化学SP法检测49例食管鳞癌组织(分化程度Ⅰ级14例,Ⅱ级23例,Ⅲ级12例;有淋巴结转移21例,无淋巴结转移28例)、23例癌旁不典型增生黏膜组织及49例正常食管黏膜组织中NDRG1 mRNA和蛋白的表达.结果:食管鳞癌组织中NDRG1 mRNA相对含量低于癌旁不典型增生黏膜组织及正常食管黏膜组织(P＜0.05或0.01);不同分化程度的食管鳞癌组织之间NDRG1 mRNA相对含量差异无统计学意义(P＞0.05);伴淋巴结转移的食管鳞癌组织与无淋巴结转移的食管鳞癌组织NDRG1 mRNA相对含量差异无统计学意义(P＞0.05).癌旁不典型增生组织及食管鳞癌组织中NDRG1蛋白( )阳性率(3/23和4/49)均低于正常黏膜组织的43/49(P＜0.01);食管鳞癌组织中NDRG1蛋白表达与癌组织的分级及有、无淋巴结转移无关(P均＞0.05).结论:食管鳞癌组织中NDRG1 mRNA和蛋白表达降低,其低表达可能与食管鳞癌发生有关.     

缺氧诱导因子-1与肿瘤的研究进展

缺氧是在许多实体性肿瘤中普遍存在的一种现象，近年来在肿瘤缺氧生物学行为方面的研究取得很大进展。缺氧诱导因子-1（hypoxia inducible fector-1．HIF-1）是缺氧状态下广泛存在于哺乳动物和人体内的一种转录因子，能激活多种缺氧反应基因的表达，并受多种因子的调控和影响。研究发现，HIF-1调控的靶基因血管内皮生长因子（VEGF）、促红细胞生成素（EPO）、内皮素-1（endothehin-1）及糖酵解酶等因子均与氧和能量代谢有关。     

乳癌组织中nm23、MMP-2、TIMP-2蛋白的表达

目的:探讨乳癌组织中nm23、MMP-2和TIMP-2蛋白的表达情况.方法:采用免疫组织化学SP法,对20例乳腺纤维腺瘤、24例乳腺导管内原位癌、58例乳腺浸润性导管癌(26例无淋巴结转移,32例有淋巴结转移)组织中上述3个指标进行检测.结果:乳腺浸润癌组织中nm23和TIMP-2蛋白阳性率低于乳腺纤维腺瘤和导管内原位癌组织(P＜0.05);乳癌组织中MMP-2蛋白阳性率高于乳腺纤维腺瘤组织(P＜0.05).伴有淋巴结转移的浸润性导管癌组织nm23阳性率低于无淋巴结转移者.结论:联合检测上述3种指标将有助于乳癌的早期诊断和预后判断.     

CD44+/CD24-细胞在乳腺癌组织及细胞系中的数量与分布

Objective To study the distribution and quantity of CD44VCD24- cells in breast cancer tissue and the cell lines,and as well as its correlation with the expression of various breast cancer markers and molecular subtyping of breast carcinoma.Methods The expression of CD44 / CD24,estrogen receptor,progesterone receptor,HER2,human estrogen-induced protein PS2,bcl-2 and nm23 in 60 cases of invasive ductal carcinoma of breast were studied by either single or double immunohistochemical staining.The co-expression of CD44 and CD24 in 3 breast cancer cell lines (MCF-7,MDA-MB-468,and MDA-MB- 231) was also examined.Results The quantity and distribution of CD44 + /CD24- cells varied greatly and no specific patterns were identified.The percentage of CD44 + /CD24- in breast cancer was 65%.The amount of CD44+/CD24- cells did not correlate with the age of patients,lymph node metastasis,tumor　 size,molecular subtypes and expression of various breast cancer markers in breast carcinoma.The proportion of CD44+/CD24- cells in MCF-7,MDA-MB-468,and MDA-MB-231 cell lines was < 1%,5% and > 80% ,respectively.Conclusions CD44+ /CD24- cells are demonstrated in certain breast cancer tissues and cell lines.However,there is no relationship obtained between the quantity or the distribution of these cells and the molecular subtyping or the clinicopathologic parameters in breast cancer.     

CD44+/CD24-细胞在乳腺癌组织及细胞系中的数量与分布

Objective To study the distribution and quantity of CD44VCD24- cells in breast cancer tissue and the cell lines,and as well as its correlation with the expression of various breast cancer markers and molecular subtyping of breast carcinoma.Methods The expression of CD44 / CD24,estrogen receptor,progesterone receptor,HER2,human estrogen-induced protein PS2,bcl-2 and nm23 in 60 cases of invasive ductal carcinoma of breast were studied by either single or double immunohistochemical staining.The co-expression of CD44 and CD24 in 3 breast cancer cell lines (MCF-7,MDA-MB-468,and MDA-MB- 231) was also examined.Results The quantity and distribution of CD44 + /CD24- cells varied greatly and no specific patterns were identified.The percentage of CD44 + /CD24- in breast cancer was 65%.The amount of CD44+/CD24- cells did not correlate with the age of patients,lymph node metastasis,tumor　 size,molecular subtypes and expression of various breast cancer markers in breast carcinoma.The proportion of CD44+/CD24- cells in MCF-7,MDA-MB-468,and MDA-MB-231 cell lines was < 1%,5% and > 80% ,respectively.Conclusions CD44+ /CD24- cells are demonstrated in certain breast cancer tissues and cell lines.However,there is no relationship obtained between the quantity or the distribution of these cells and the molecular subtyping or the clinicopathologic parameters in breast cancer.     

神经干细胞移植对实验性脑挫裂伤大鼠神经元及其环路的修复再生作用

背景：神经干细胞体内可发育成终末神经细胞，替代受损组织，重建神经环路恢复功能。目的：探讨神经干细胞移植对动物实验性脑挫裂伤的治疗作用。设计：完全随机对照实验研究。地点与材料：郑州市第二人民医院脑外科。18只Wistar(来源于河南省实验动物中心)成年大鼠雌雄不拘。清洁级。干预：将18只大鼠随机分为3组。对照组：单侧大脑半球致伤未移植；实验组：单侧致伤行细胞移植；双侧半球致伤组：一侧对照，对侧移植。主要观察指标：损伤区脑组织大体观察和该区脑组织苏木精-伊红染色切片。结果：移植组(侧)大脑半球肉眼观损伤区脑组织基本平坦，镜下见大量新生的细胞和血管，而变性或坏死细胞少见。实验组(侧)大脑局限性凹陷。组织坏死，镜下有细胞变性、坏死，区域性融合呈空泡状，缺乏细胞增生迹象。结论：神经干细胞移植对实验性脑挫裂伤具有显著的修复作用。     

不同分子亚型乳腺浸润性导管癌组织中Sox2和Oct4蛋白的表达

目的:探讨不同分子亚型乳腺浸润性导管癌组织中Sox2与Oct4蛋白的表达及意义。方法:根据癌组织ER、PR、HER-2的表达情况将120例乳腺浸润性导管癌分型为LuminalA45例、LuminalB29例、HER-2过表达27例和Basal-like19例。采用免疫组化SP法检测不同分子亚型乳腺浸润性导管癌组织中Sox2与Oct4蛋白的表达。结果:4种分子亚型乳腺浸润性导管癌组织中Sox2与Oct4蛋白的表达比较,差异有统计学意义(H=27.688和50.737,P<0.001);Basal-like型乳腺浸润性导管癌组织中Sox2与Oct4蛋白的表达高于其他3种类型,LuminalA型低于其他3种类型(P<0.05)。乳腺浸润性导管癌组织中Oct4与Sox2的表达相关(rS=0.506,P<0.001)。结论:肿瘤干细胞标志物Sox2与Oct4蛋白的表达可能与乳腺浸润性导管癌的生物学行为密切相关。